pike.git/src/modules/Parser/html.c:5f58bdeecb41320455102b95b9180cba3c5d04f5

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5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.h" #include "config.h" #include "pike_macros.h" #include "object.h" #include "constants.h" #include "interpret.h" #include "svalue.h" #include "threads.h" #include "array.h" #include "pike_error.h" #include "operators.h" #include "builtin_functions.h" #include "module_support.h" #include "mapping.h" #include "stralloc.h" #include "program_id.h" #include "block_allocator.h" #include <ctype.h> #include "parser.h" #define sp Pike_sp extern struct program *parser_html_program; /* #define SCAN_DEBUG */ /* #define DEBUG */ #ifdef DEBUG #undef DEBUG #define DEBUG(X) do if (THIS->flags & FLAG_DEBUG_MODE) {fprintf X;} while (0) #define DEBUG_MARK_SPOT debug_mark_spot #define HTML_DEBUG #else #define DEBUG(X) do {} while(0) #define DEBUG_MARK_SPOT(TEXT,FEED,C) do {} while(0) #endif #if 0 #define free(X) fprintf(stderr,"free line %d: %p\n",__LINE__,X); free(X) #endif #define MAX_FEED_STACK_DEPTH 10 /* Define this to get configurable markup chars (i.e. the '<' '>' '&' * '"' etc). It's currently undefined since there are no user access * functions for it, and it slows the parser down. Besides, I honestly * can't see the point with making these things changeable. */ /* #define CONFIGURABLE_MARKUP */ /*! @module Parser */ /*! @class HTML *! This is a simple parser for SGML structured markups. It's not *! really HTML, but it's useful for that purpose. *! *! The simple way to use it is to give it some information about *! available tags and containers, and what callbacks those are to *! call. *! *! The object is easily reused, by calling the @[clone()] function. *! *! @seealso *! @[add_tag], @[add_container], @[finish] */ struct location { int byteno; /* current byte, first=0 */ int lineno; /* line number, first=1 */ int linestart; /* byte current line started at */ }; static const struct location init_pos = {0, 1, 0}; struct piece { struct pike_string *s; struct piece *next; }; static struct block_allocator piece_allocator = BA_INIT_PAGES(sizeof(struct piece), 2); static INLINE struct piece * alloc_piece(void) { struct piece * p = ba_alloc(&piece_allocator); p->next = NULL; return p; } static INLINE void really_free_piece(struct piece * p) { free_string(p->s); ba_free(&piece_allocator, p); } struct out_piece { struct svalue v; struct out_piece *next; }; static struct block_allocator out_piece_allocator = BA_INIT_PAGES(sizeof(struct out_piece), 2); static INLINE struct out_piece * alloc_out_piece(void) { struct out_piece * p = ba_alloc(&out_piece_allocator); p->next = NULL; return p; } static INLINE void really_free_out_piece(struct out_piece * p) { free_svalue(&p->v); ba_free(&out_piece_allocator, p); } struct feed_stack { int ignore_data, parse_tags; struct feed_stack *prev; /* this is a feed-stack, ie these contains the result of callbacks, if they are to be parsed. The bottom stack element is also the global feed (parser_html_storage.top). */ /* current position; if not local feed, use global feed */ struct piece *local_feed; ptrdiff_t c; struct location pos; }; static struct block_allocator feed_stack_allocator = BA_INIT_PAGES(sizeof(struct feed_stack), 1); static INLINE struct feed_stack * alloc_feed_stack(void) { struct feed_stack * p = ba_alloc(&feed_stack_allocator); p->local_feed = NULL; return p; } static INLINE void really_free_feed_stack(struct feed_stack * p) { while (p->local_feed) { struct piece *f=p->local_feed; p->local_feed=f->next; really_free_piece (f); } ba_free(&feed_stack_allocator, p); } enum types { TYPE_TAG, /* empty tag callback */ TYPE_CONT, /* container tag callback */ TYPE_ENTITY, /* entity */ TYPE_QTAG, /* quote tag callback */ TYPE_DATA /* data callback */ }; enum contexts { CTX_DATA, /* in normal text data */ CTX_TAG, /* in a tag, before an arg name */ CTX_SPLICE_ARG, /* in a splice arg */ CTX_TAG_ARG, /* before an unquoted tag arg */ CTX_TAG_QUOTED_ARG/*+ n*/, /* in a tag arg quoted with quote n */ }; /* flag: case sensitive tag matching */ #define FLAG_CASE_INSENSITIVE_TAG 0x00000001 /* flag: arg quote may have tag_end to end quote and tag */ #define FLAG_LAZY_END_ARG_QUOTE 0x00000002 /* flag: the chars in lazy_entity_ends ends the search for entity ends */ #define FLAG_LAZY_ENTITY_END 0x00000004 /* flag: match '<' and '>' for in-tag-tags (<foo <bar>>) */ #define FLAG_MATCH_TAG 0x00000008 /* flag: treat unknown tags and entities as text */ #define FLAG_IGNORE_UNKNOWN 0x00000020 /* flag: debug output */ #define FLAG_DEBUG_MODE 0x00000040 /* flag: xml tag syntax */ #define FLAG_XML_TAGS 0x00000080 /* flag: strict html or xml syntax, corresponding to flags 0 or 3 to * the xml_tag_syntax() function */ #define FLAG_STRICT_TAGS 0x00000100 /* flag: allow whitespace before the tag name */ #define FLAG_WS_BEFORE_TAG_NAME 0x00000200 /* flag: parse tags */ #define FLAG_PARSE_TAGS 0x00000400 /* flag: understand nestled entities (send it all to entity callback) */ /* disabled by FLAG_LAZY_ENTITY_END */ #define FLAG_NESTLING_ENTITY_END 0x00000800 /* flag: ignore --...-- in tag parsing (as in ) */ #define FLAG_IGNORE_COMMENTS 0x00001000 /* flag: reparse plain strings used as tag/container/entity callbacks */ #define FLAG_REPARSE_STRINGS 0x00002000 /* flag: attribute quote stapling. (q=f"o'o"'b"a'r == q="fo'ob"ar") */ #define FLAG_QUOTE_STAPLING 0x00004000 /* default characters */ #define DEF_WS ' ', '\n', '\r', '\t', '\v' #define DEF_TAG_START '<' #define DEF_TAG_END '>' #define DEF_TAG_FIN '/' #define DEF_ENT_START '&' #define DEF_ENT_END ';' #define DEF_ARGQ_STARTS '\"', '\'' #define DEF_ARGQ_STOPS '\"', '\'' #define DEF_EQ '=' #define DEF_LAZY_EENDS DEF_WS, DEF_TAG_START, DEF_TAG_END, DEF_TAG_FIN, \ DEF_ENT_START, DEF_ENT_END, DEF_ARGQ_STARTS, DEF_EQ #define DEF_TAG_COMMENT '-' /* --..-- */ static const p_wchar2 argq_start[] = {DEF_ARGQ_STARTS}; static const p_wchar2 argq_stop[] = {DEF_ARGQ_STOPS}; static const p_wchar2 lazy_entity_ends[] = {DEF_LAZY_EENDS}; static const p_wchar2 whitespace[] = {DEF_WS}; #ifdef CONFIGURABLE_MARKUP #define MAX_ARGQ 8 #define TAG_START(this) (this->tag_start) #define TAG_END(this) (this->tag_end) #define TAG_FIN(this) (this->tag_fin) #define ENTITY_START(this) (this->entity_start) #define ENTITY_END(this) (this->entity_end) #define NARGQ(this) (this->nargq) #define ARGQ_START(this) (this->argq_start) #define ARGQ_STOP(this) (this->argq_stop) #define ARG_EQ(this) (this->arg_eq) #define LAZY_ENTITY_ENDS(this) (this->lazy_entity_ends) #define N_LAZY_ENTITY_ENDS(this) (this->n_lazy_entity_ends) #define TAG_COMMENT(this) DEF_TAG_COMMENT #define WS(this) (this->ws) #define N_WS(this) (this->n_ws) #else #define MAX_ARGQ NELEM (argq_start) static const p_wchar2 tag_start = DEF_TAG_START, tag_end = DEF_TAG_END, tag_fin = DEF_TAG_FIN, entity_start = DEF_ENT_START, entity_end = DEF_ENT_END, arg_eq = DEF_EQ; #define TAG_START(this) tag_start #define TAG_END(this) tag_end #define TAG_FIN(this) tag_fin #define ENTITY_START(this) entity_start #define ENTITY_END(this) entity_end #define NARGQ(this) NELEM (argq_start) #define ARGQ_START(this) argq_start #define ARGQ_STOP(this) argq_stop #define ARG_EQ(this) arg_eq #define LAZY_ENTITY_ENDS(this) lazy_entity_ends #define N_LAZY_ENTITY_ENDS(this) NELEM (lazy_entity_ends) #define TAG_COMMENT(this) DEF_TAG_COMMENT #define WS(this) whitespace #define N_WS(this) NELEM (whitespace) #endif struct calc_chars /* Calculated char sets. */ { /* whitespace + end argument ('=', '<', '>' and '/') + * start quote + start entity + tag comment */ #ifdef CONFIGURABLE_MARKUP p_wchar2 *arg_break_chars; #else p_wchar2 arg_break_chars[N_WS(0) + 4 + NARGQ(0) + 2]; #endif size_t n_arg_break_chars; /* end argument ('=', '>' and '/') + start quote */ p_wchar2 look_for_start[MAX_ARGQ+5]; size_t num_look_for_start; /* end(s) of _this_ arg quote */ p_wchar2 look_for_end[MAX_ARGQ][MAX_ARGQ+4]; size_t num_look_for_end[MAX_ARGQ]; }; #ifdef CONFIGURABLE_MARKUP #define ARG_BREAK_CHARS(this) (this->cc.arg_break_chars) #define N_ARG_BREAK_CHARS(this) (this->cc.n_arg_break_chars) #define LOOK_FOR_START(this) (this->cc.look_for_start) #define NUM_LOOK_FOR_START(this) (this->cc.num_look_for_start) #define LOOK_FOR_END(this) (this->cc.look_for_end) #define NUM_LOOK_FOR_END(this) (this->cc.num_look_for_end) #define TAG_END_STRING(this) make_shared_binary_string2 (&TAG_END (this), 1) #define TAG_FIN_STRING(this) make_shared_binary_string2 (&TAG_FIN (this), 1) #else /* All combinations of the flags that affect the calculated char sets: * * o (this->flags & (FLAG_STRICT_TAGS|FLAG_XML_TAGS)) == FLAG_STRICT_TAGS * o this->flags & FLAG_LAZY_END_ARG_QUOTE * o this->flags & FLAG_IGNORE_COMMENTS */ static struct calc_chars char_variants[ 1 << 3]; #define ARG_BREAK_CHARS(this) (this->cc->arg_break_chars) #define N_ARG_BREAK_CHARS(this) (this->cc->n_arg_break_chars) #define LOOK_FOR_START(this) (this->cc->look_for_start) #define NUM_LOOK_FOR_START(this) (this->cc->num_look_for_start) #define LOOK_FOR_END(this) (this->cc->look_for_end) #define NUM_LOOK_FOR_END(this) (this->cc->num_look_for_end) static struct pike_string *tag_end_string, *tag_fin_string; #define TAG_END_STRING(this) (add_ref (tag_end_string), tag_end_string) #define TAG_FIN_STRING(this) (add_ref (tag_fin_string), tag_fin_string) #endif struct parser_html_storage { /*--- current state -----------------------------------------------*/ /* Where new fed info is added. */ struct piece *feed_end; /* Feed chain waiting to be passed to the data callback. */ struct piece *data_cb_feed, *data_cb_feed_end; struct location data_cb_pos; /* resulting data */ struct out_piece *out,*out_end; /* Upper bound for the string shift in the output queue. -1 when in * mixed mode. */ int out_max_shift; /* Total length of all strings in the output queue, or the number * of values in it when in mixed mode. */ ptrdiff_t out_length; /* The current context in the output queue. */ enum contexts out_ctx; /* parser stack */ struct feed_stack *stack; struct feed_stack top; int stack_count; int max_stack_depth; /* current range (ie, current tag/entity/whatever) */ /* start is also used to flag callback recursion */ struct piece *start,*end; ptrdiff_t cstart,cend; /* the type of the current thing being parsed */ enum types type; /*--- user configurable -------------------------------------------*/ /* extra arguments */ struct array *extra_args; /* named stuff */ struct mapping *maptag; struct mapping *mapcont; struct mapping *mapentity; struct mapping *mapqtag; /* mapqtag is indexed on the first two chars in each tag name. The * values are concatenated tuples of ({name, to_do, end}), where * every name that's a prefix of some other name comes after it. */ /* string to use for magic splice argument */ struct pike_string *splice_arg; /* callback functions */ struct svalue callback__tag; struct svalue callback__data; struct svalue callback__entity; /* flag bitfield; see FLAG_* above */ int flags; #ifdef CONFIGURABLE_MARKUP p_wchar2 tag_start,tag_end,tag_fin; /* tag_fin is the '/'s in <t/><c></c> */ p_wchar2 entity_start,entity_end; size_t nargq; p_wchar2 argq_start[MAX_ARGQ],argq_stop[MAX_ARGQ]; p_wchar2 arg_eq; /* = as in foo=bar */ p_wchar2 *lazy_entity_ends; size_t n_lazy_entity_ends; p_wchar2 *ws; size_t n_ws; struct calc_chars cc; #else struct calc_chars *cc; #endif }; /* P_WAIT was already used by MSVC++ :( /Hubbe */ typedef enum { STATE_DONE=0, STATE_WAIT, STATE_REREAD, STATE_REPARSE } newstate; #ifdef THIS #undef THIS /* Needed for NT */ #endif #define THIS ((struct parser_html_storage*)(Pike_fp->current_storage)) #define THISOBJ (Pike_fp->current_object) static void tag_name(struct parser_html_storage *this, struct piece *feed, ptrdiff_t c, int skip_tag_start); static void tag_args(struct parser_html_storage *this, struct piece *feed, ptrdiff_t c,struct svalue *def, int skip_name, int to_tag_end); static int quote_tag_lookup (struct parser_html_storage *this, struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, int finished, struct svalue **mapqentry); /****** debug helper ********************************/ /* Avoid loss of precision warnings. */ #ifdef __ECL static inline long TO_LONG(ptrdiff_t x) { return DO_NOT_WARN((long)x); } #else /* !__ECL */ #define TO_LONG(x) ((long)(x)) #endif /* __ECL */ #ifdef HTML_DEBUG static void debug_mark_spot(char *desc,struct piece *feed,int c) { ptrdiff_t l, i, i0, m; char buf[40]; if (!(THIS->flags & FLAG_DEBUG_MODE)) return; l=strlen(desc)+1; if (l<40) l=40; m=75-l; if (m<10) m=10; fprintf(stderr,"%-*s `",DO_NOT_WARN((int)l),desc); i=c-m/2; if (i+m>=feed->s->len) i=feed->s->len-m; if (i<0) i=0; for (i0=i;i<feed->s->len && i-i0<m;i++) { p_wchar2 ch=index_shared_string(feed->s,i); /* if (i==c) { fprintf(stderr,"^"); continue; }*/ if (ch<32 || (ch>126 && ch<160) || ch>255) fprintf(stderr,"."); else fprintf(stderr,"%c",ch); } sprintf(buf,"(%ld) %p:%d/%ld ^", DO_NOT_WARN((long)i0), (void *)feed, c, DO_NOT_WARN((long)feed->s->len)); fprintf(stderr,"`\n%*s\n", DO_NOT_WARN((int)(l+c-i0+3)), buf); } static void debug_print_chars (const p_wchar2 *chars, size_t numchars) { size_t i; for (i=0; i<numchars; i++) if (i > 30) { fprintf (stderr, "... (number of chars suspiciously large: " "%"PRINTSIZET"u)", numchars); break; } else if (chars[i]<33 || (chars[i]>126 && chars[i]<160) || chars[i]>255) fprintf(stderr,"%d ",chars[i]); else fprintf(stderr,"'%c' ",chars[i]); fprintf(stderr,"\n"); } static void debug_print_search_chars (struct parser_html_storage *this) { size_t i; fprintf (stderr, " arg_break_chars: "); debug_print_chars (ARG_BREAK_CHARS (this), N_ARG_BREAK_CHARS (this)); fprintf (stderr, " look_for_start: "); debug_print_chars (LOOK_FOR_START (this), NUM_LOOK_FOR_START (this)); for (i = 0; i < NARGQ (this); i++) { fprintf (stderr, " look_for_end[%"PRINTSIZET"u]: ", i); debug_print_chars (LOOK_FOR_END (this)[i], NUM_LOOK_FOR_END (this)[i]); } } #endif /****** init & exit *********************************/ static INLINE void reset_stack_head (struct parser_html_storage *this) { this->top.ignore_data=0; this->top.parse_tags=this->flags & FLAG_PARSE_TAGS; this->top.pos=init_pos; this->top.c=0; } static void reset_feed(struct parser_html_storage *this) { struct feed_stack *st; /* kill top feed */ while (this->top.local_feed) { struct piece *f=this->top.local_feed; this->top.local_feed=f->next; really_free_piece (f); } this->feed_end=NULL; /* kill data cb feed */ while (this->data_cb_feed) { struct piece *f=this->data_cb_feed; this->data_cb_feed=f->next; really_free_piece (f); } this->data_cb_feed_end=NULL; /* kill out-feed */ while (this->out) { struct out_piece *f=this->out; this->out=f->next; really_free_out_piece (f); } if (this->out_max_shift > 0) this->out_max_shift = 0; this->out_length = 0; this->out_ctx = CTX_DATA; /* Free stack and init new stack head. */ while (1) { st=this->stack; if (!st->prev) break; this->stack=st->prev; really_free_feed_stack (st); } this->stack_count=0; reset_stack_head (this); } static void calculate_chars ( #ifdef CONFIGURABLE_MARKUP struct parser_html_storage *this #define CC (&this->cc) #define FLAGS (this->flags) #else struct calc_chars *CC, int FLAGS #endif ) { size_t n,i,j,k; int check_fin = (FLAGS & (FLAG_STRICT_TAGS|FLAG_XML_TAGS)) != FLAG_STRICT_TAGS; p_wchar2 *ws_or_endarg; ptrdiff_t n_ws_or_endarg; /* prepare look for start of argument quote or end of tag */ CC->look_for_start[0] = TAG_END (this); CC->look_for_start[1] = ARG_EQ (this); CC->look_for_start[2] = TAG_START (this); if (check_fin) { CC->look_for_start[3] = TAG_FIN (this); n=4; } else n=3; for (i=0; i < NARGQ (this); i++) { for (j=0; j<n; j++) if (CC->look_for_start[j] == ARGQ_START (this)[i]) goto found_start; CC->look_for_start[n++] = ARGQ_START (this)[i]; found_start: ; } CC->num_look_for_start=n; #ifdef PIKE_DEBUG if (n > NELEM (CC->look_for_start)) Pike_fatal ("Static size of calc_chars.look_for_start is " "%"PRINTSIZET"d but %"PRINTSIZET"d required.\n", NELEM (CC->look_for_start), n); #endif for (k=0; k < NARGQ (this); k++) { n=0; CC->look_for_end[k][n++] = ARGQ_STOP (this)[k]; CC->look_for_end[k][n++] = ENTITY_START (this); for (i=0; i < NARGQ (this); i++) if (ARGQ_START (this)[k] == ARGQ_START (this)[i]) { for (j=0; j < NARGQ (this); j++) if (CC->look_for_end[k][j] == ARGQ_START (this)[i]) goto found_end; CC->look_for_end[k][n++] = ARGQ_START (this)[i]; found_end: ; } if (FLAGS & FLAG_LAZY_END_ARG_QUOTE) { CC->look_for_end[k][n++] = TAG_END (this); if (check_fin) CC->look_for_end[k][n++] = TAG_FIN (this); } CC->num_look_for_end[k]=n; #ifdef PIKE_DEBUG if (n > NELEM (CC->look_for_end[k])) Pike_fatal ("Static size of calc_chars.look_for_end[k] is " "%"PRINTSIZET"d but %"PRINTSIZET"d required.\n", NELEM (CC->look_for_end[k]), n); #endif } #ifdef PIKE_DEBUG if (k > NELEM (CC->look_for_end)) Pike_fatal ("Static size of calc_chars.look_for_end is " "%"PRINTSIZET"d but %"PRINTSIZET"d required.\n", NELEM (CC->look_for_end), k); #endif n = check_fin ? 4 : 3; n_ws_or_endarg = (ptrdiff_t)(N_WS(this) + n); ws_or_endarg=alloca(sizeof(p_wchar2)*n_ws_or_endarg); if (!ws_or_endarg) Pike_error ("Out of stack.\n"); memcpy(ws_or_endarg+n, WS (this), N_WS (this) * sizeof(p_wchar2)); ws_or_endarg[0] = ARG_EQ (this); ws_or_endarg[1] = TAG_END (this); ws_or_endarg[2] = TAG_START (this); if (check_fin) ws_or_endarg[3] = TAG_FIN (this); CC->n_arg_break_chars= n_ws_or_endarg + NARGQ (this) + 1 + ((FLAGS & FLAG_IGNORE_COMMENTS)?1:0); #ifdef CONFIGURABLE_MARKUP if (CC->arg_break_chars) { free(CC->arg_break_chars); CC->arg_break_chars=NULL; } CC->arg_break_chars= (p_wchar2*)xalloc(sizeof(p_wchar2)*(CC->n_arg_break_chars)); #else #ifdef PIKE_DEBUG if (CC->n_arg_break_chars > NELEM (CC->arg_break_chars)) Pike_fatal ("Static size of calc_chars.arg_break_chars is " "%"PRINTSIZET"d but %"PRINTSIZET"d required.\n", NELEM (CC->arg_break_chars), CC->n_arg_break_chars); #endif #endif memcpy(CC->arg_break_chars, ws_or_endarg, n_ws_or_endarg*sizeof(p_wchar2)); memcpy(CC->arg_break_chars+n_ws_or_endarg, ARGQ_START (this), NARGQ (this) * sizeof(p_wchar2)); CC->arg_break_chars[CC->n_arg_break_chars-1] = ENTITY_START (this); if ((FLAGS & FLAG_IGNORE_COMMENTS)) CC->arg_break_chars[CC->n_arg_break_chars-2] = TAG_COMMENT (this); } #undef CC #undef FLAGS #ifdef CONFIGURABLE_MARKUP #define init_calc_chars() #define exit_calc_chars() #define recalculate_argq(this) \ calculate_chars (this); \ DEBUG ((stderr, "Recalculated search chars:\n"); \ debug_print_search_chars (this)) #else #define recalculate_argq(this) \ this->cc = select_variant (this->flags); \ DEBUG ((stderr, "Using precalculated search chars:\n"); \ debug_print_search_chars (this)) static INLINE void init_calc_chars(void) { int i; for (i = 0; i < 1 << 3; i++) calculate_chars (char_variants + i, ((i & 1) ? FLAG_STRICT_TAGS : 0) | ((i & 2) ? FLAG_LAZY_END_ARG_QUOTE : 0) | ((i & 4) ? FLAG_IGNORE_COMMENTS : 0)); tag_end_string = make_shared_binary_string2 (&TAG_END (0), 1); tag_fin_string = make_shared_binary_string2 (&TAG_FIN (0), 1); } static INLINE void exit_calc_chars(void) { free_string (tag_end_string); free_string (tag_fin_string); } static INLINE struct calc_chars *select_variant (int flags) { return char_variants + (((flags & (FLAG_STRICT_TAGS|FLAG_XML_TAGS)) == FLAG_STRICT_TAGS ? 1 : 0) | (flags & FLAG_LAZY_END_ARG_QUOTE ? 2 : 0) | (flags & FLAG_IGNORE_COMMENTS ? 4 : 0)); } #endif static void init_html_struct(struct object *UNUSED(o)) { #ifdef HTML_DEBUG THIS->flags=0; #endif DEBUG((stderr,"init_html_struct %p\n",THIS)); /* state */ THIS->start=NULL; #ifdef CONFIGURABLE_MARKUP /* default set */ THIS->tag_start=DEF_TAG_START; THIS->tag_end=DEF_TAG_END; THIS->tag_fin=DEF_TAG_FIN; THIS->entity_start=DEF_ENT_START; THIS->entity_end=DEF_ENT_END; THIS->nargq=NELEM(argq_start); memcpy(THIS->argq_start,argq_start,sizeof(argq_start)); memcpy(THIS->argq_stop,argq_stop,sizeof(argq_stop)); THIS->arg_eq=DEF_EQ; /* allocated stuff */ THIS->lazy_entity_ends=NULL; THIS->ws=NULL; THIS->cc.arg_break_chars=NULL; #endif THIS->flags=FLAG_MATCH_TAG|FLAG_PARSE_TAGS; /* initialize feed */ THIS->data_cb_feed = NULL; THIS->out=NULL; THIS->out_length = THIS->out_max_shift = 0; THIS->stack = &THIS->top; THIS->top.prev = NULL; THIS->top.local_feed = NULL; reset_feed(THIS); /* settings */ THIS->max_stack_depth=MAX_FEED_STACK_DEPTH; /* this may now throw */ #ifdef CONFIGURABLE_MARKUP THIS->lazy_entity_ends=(p_wchar2*)xalloc(sizeof(lazy_entity_ends)); memcpy(THIS->lazy_entity_ends,lazy_entity_ends,sizeof(lazy_entity_ends)); THIS->n_lazy_entity_ends=NELEM(lazy_entity_ends); THIS->ws=(p_wchar2*)xalloc(sizeof(whitespace)); memcpy(THIS->ws,whitespace,sizeof(whitespace)); THIS->n_ws=NELEM(whitespace); #endif THIS->maptag=allocate_mapping(32); THIS->mapcont=allocate_mapping(32); THIS->mapentity=allocate_mapping(32); THIS->mapqtag=allocate_mapping(8); recalculate_argq(THIS); } static void exit_html_struct(struct object *UNUSED(o)) { DEBUG((stderr,"exit_html_struct %p\n",THIS)); reset_feed(THIS); #ifdef CONFIGURABLE_MARKUP if (THIS->lazy_entity_ends) free(THIS->lazy_entity_ends); if (THIS->ws) free(THIS->ws); if (THIS->cc.arg_break_chars) free(THIS->cc.arg_break_chars); #endif DEBUG((stderr,"exit_html_struct %p done\n",THIS)); } /****** setup callbacks *****************************/ /*! @decl Parser.HTML _set_tag_callback(function|string|array to_call) *! @decl Parser.HTML _set_entity_callback(function|string|array to_call) *! @decl Parser.HTML _set_data_callback(function|string|array to_call) *! *! These functions set up the parser object to call the given *! callbacks upon tags, entities and/or data. The callbacks will *! @i{only@} be called if there isn't another tag/container/entity *! handler for these. *! *! The callback function will be called with the parser object as *! first argument, and the active string as second. Note that no *! parsing of the contents has been done. Both endtags and normal *! tags are called; there is no container parsing. *! *! The return values from the callbacks are handled in the same way *! as the return values from callbacks registered with @[add_tag] and *! similar functions. *! *! The data callback will be called as seldom as possible with the *! longest possible string, as long as it doesn't get called out of *! order with any other callback. It will never be called with a zero *! length string. *! *! If a string or array is given instead of a function, it *! will act as the return value from the function. Arrays *! or empty strings is probably preferable to avoid recursion. *! *! @returns *! Returns the object being called. */ static void html__set_tag_callback(INT32 args) { if (!args) Pike_error("_set_tag_callback: too few arguments\n"); dmalloc_touch_svalue(sp-args); assign_svalue(&(THIS->callback__tag),sp-args); pop_n_elems(args); ref_push_object(THISOBJ); } static void html__set_data_callback(INT32 args) { if (!args) Pike_error("_set_data_callback: too few arguments\n"); dmalloc_touch_svalue(sp-args); assign_svalue(&(THIS->callback__data),sp-args); pop_n_elems(args); ref_push_object(THISOBJ); } static void html__set_entity_callback(INT32 args) { if (!args) Pike_error("_set_entity_callback: too few arguments\n"); dmalloc_touch_svalue(sp-args); assign_svalue(&(THIS->callback__entity),sp-args); pop_n_elems(args); ref_push_object(THISOBJ); } /*! @decl Parser.HTML add_tag(string name,mixed to_do) *! @decl Parser.HTML add_container(string name,mixed to_do) *! @decl Parser.HTML add_entity(string entity,mixed to_do) *! @decl Parser.HTML add_quote_tag(string name,mixed to_do,string end) *! @decl Parser.HTML add_tags(mapping(string:mixed) tags) *! @decl Parser.HTML add_containers(mapping(string:mixed) containers) *! @decl Parser.HTML add_entities(mapping(string:mixed) entities) *! *! Registers the actions to take when parsing various things. Tags, *! containers, entities are as usual. @[add_quote_tag()] adds a special *! kind of tag that reads any data until the next occurrence of the *! end string immediately before a tag end. *! *! @param to_do *! This argument can be any of the following. *! *! @mixed *! @type function *! The function will be called as a callback function. It will *! get the following arguments, depending on the type of *! callback. *! @pre{ *! mixed tag_callback(Parser.HTML parser,mapping args,mixed ... extra) *! mixed container_callback(Parser.HTML parser,mapping args,string content,mixed ... extra) *! mixed entity_callback(Parser.HTML parser,mixed ... extra) *! mixed quote_tag_callback(Parser.HTML parser,string content,mixed ... extra) *! @} *! *! @type string *! This tag/container/entity is then replaced by the string. *! The string is normally not reparsed, i.e. it's equivalent to *! writing a function that returns the string in an array (but *! a lot faster). If @[reparse_strings] is set the string will *! be reparsed, though. *! *! @type array *! The first element is a function as above. It will receive *! the rest of the array as extra arguments. If extra arguments *! are given by @[set_extra()], they will appear after *! the ones in this array. *! *! @type int(0..) *! If there is a tag/container/entity with the given name in *! the parser, it's removed. *! *! @endmixed *! *! The callback function can return: *! *! @mixed *! *! @type string *! This string will be pushed on the parser stack and be *! parsed. Be careful not to return anything in this way that *! could lead to a infinite recursion. *! *! @type array *! The element(s) of the array is the result of the function. *! This will not be parsed. This is useful for avoiding *! infinite recursion. The array can be of any size, this means *! the empty array is the most effective to return if you don't *! care about the result. If the parser is operating in *! @[mixed_mode], the array can contain anything. Otherwise *! only strings are allowed. *! *! @type int(0..0) *! This means "don't do anything", ie the item that generated *! the callback is left as it is, and the parser continues. *! *! @type int(1..1) *! Reparse the last item again. This is useful to parse a tag *! as a container, or vice versa: just add or remove callbacks *! for the tag and return this to jump to the right callback. *! @endmixed *! *! @returns *! Returns the object being called. *! *! @seealso *! @[tags], @[containers], @[entities] *! */ static void html_add_tag(INT32 args) { check_all_args("add_tag",args,BIT_STRING, BIT_INT|BIT_STRING|BIT_ARRAY|BIT_FUNCTION|BIT_OBJECT|BIT_PROGRAM,0); if (TYPEOF(sp[1-args]) == T_ARRAY) { struct array *a = sp[1-args].u.array; if (!a->size || (TYPEOF(a->item[0]) != T_FUNCTION && TYPEOF(a->item[0]) != T_OBJECT && TYPEOF(a->item[0]) != T_PROGRAM)) SIMPLE_BAD_ARG_ERROR("add_tag", 1, "array with function as first element"); } else if (TYPEOF(sp[1-args]) == T_INT && sp[1-args].u.integer) SIMPLE_BAD_ARG_ERROR("add_tag", 1, "zero, string, array or function"); if (THIS->maptag->refs>1) { push_mapping(THIS->maptag); THIS->maptag=copy_mapping(THIS->maptag); pop_stack(); } if (THIS->flags & FLAG_CASE_INSENSITIVE_TAG) { stack_swap(); f_lower_case(1); stack_swap(); } if (UNSAFE_IS_ZERO(sp-1)) map_delete(THIS->maptag,sp-2); else mapping_insert(THIS->maptag,sp-2,sp-1); pop_n_elems(args); ref_push_object(THISOBJ); } static void html_add_container(INT32 args) { check_all_args("add_container",args,BIT_STRING, BIT_INT|BIT_STRING|BIT_ARRAY|BIT_FUNCTION|BIT_OBJECT|BIT_PROGRAM,0); if (TYPEOF(sp[1-args]) == T_ARRAY) { struct array *a = sp[1-args].u.array; if (!a->size || (TYPEOF(a->item[0]) != T_FUNCTION && TYPEOF(a->item[0]) != T_OBJECT && TYPEOF(a->item[0]) != T_PROGRAM)) SIMPLE_BAD_ARG_ERROR("add_container", 1, "array with function as first element"); } else if (TYPEOF(sp[1-args]) == T_INT && sp[1-args].u.integer) SIMPLE_BAD_ARG_ERROR("add_tag", 1, "zero, string, array or function"); if (args > 2) { pop_n_elems(args-2); args = 2; } if (THIS->mapcont->refs>1) { push_mapping(THIS->mapcont); THIS->mapcont=copy_mapping(THIS->mapcont); pop_stack(); } if (THIS->flags & FLAG_CASE_INSENSITIVE_TAG) { stack_swap(); f_lower_case(1); stack_swap(); } if (UNSAFE_IS_ZERO(sp-1)) map_delete(THIS->mapcont,sp-2); else mapping_insert(THIS->mapcont,sp-2,sp-1); pop_n_elems(args); ref_push_object(THISOBJ); } static void html_add_entity(INT32 args) { check_all_args("add_entity",args,BIT_STRING, BIT_INT|BIT_STRING|BIT_ARRAY|BIT_FUNCTION|BIT_OBJECT|BIT_PROGRAM,0); if (TYPEOF(sp[1-args]) == T_ARRAY) { struct array *a = sp[1-args].u.array; if (!a->size || (TYPEOF(a->item[0]) != T_FUNCTION && TYPEOF(a->item[0]) != T_OBJECT && TYPEOF(a->item[0]) != T_PROGRAM)) SIMPLE_BAD_ARG_ERROR("add_entity", 1, "array with function as first element"); } else if (TYPEOF(sp[1-args]) == T_INT && sp[1-args].u.integer) SIMPLE_BAD_ARG_ERROR("add_tag", 1, "zero, string, array or function"); if (THIS->mapentity->refs>1) { push_mapping(THIS->mapentity); THIS->mapentity=copy_mapping(THIS->mapentity); pop_stack(); } if (UNSAFE_IS_ZERO(sp-1)) map_delete(THIS->mapentity,sp-2); else mapping_insert(THIS->mapentity,sp-2,sp-1); pop_n_elems(args); ref_push_object(THISOBJ); } static void html_add_quote_tag(INT32 args) { int remove; struct mapping *map; struct pike_string *name; struct pike_string *prefix; struct svalue *val; ONERROR uwp; check_all_args("add_quote_tag",args,BIT_STRING, BIT_INT|BIT_STRING|BIT_ARRAY|BIT_FUNCTION|BIT_OBJECT|BIT_PROGRAM, BIT_STRING|BIT_VOID,0); if (TYPEOF(sp[1-args]) == T_ARRAY) { struct array *a = sp[1-args].u.array; if (!a->size || (TYPEOF(a->item[0]) != T_FUNCTION && TYPEOF(a->item[0]) != T_OBJECT && TYPEOF(a->item[0]) != T_PROGRAM)) SIMPLE_BAD_ARG_ERROR("add_quote_tag", 1, "array with function as first element"); } else if (TYPEOF(sp[1-args]) == T_INT && sp[1-args].u.integer) SIMPLE_BAD_ARG_ERROR("add_tag", 1, "zero, string, array or function"); remove = UNSAFE_IS_ZERO (sp+1-args); if (!remove && args < 3) SIMPLE_TOO_FEW_ARGS_ERROR ("add_quote_tag", 3); if (THIS->mapqtag->refs>1) { push_mapping(THIS->mapqtag); /* Note: Deferred copy; the arrays might still have only one ref. */ THIS->mapqtag=copy_mapping(THIS->mapqtag); pop_stack(); } map = THIS->mapqtag; if (!remove) { struct pike_string *end = TAG_END_STRING (THIS); pop_n_elems (args-3); args = 3; push_string (end); f_add (2); } name = dmalloc_touch (struct pike_string *, sp[-args].u.string); if (name->len > 2) prefix = string_slice (name, 0, 2); else copy_shared_string (prefix, name); SET_ONERROR (uwp, do_free_string, prefix); val = low_mapping_string_lookup (map, prefix); if (val) { int i; struct array *arr; #ifdef PIKE_DEBUG if (TYPEOF(*val) != T_ARRAY) Pike_fatal ("Expected array as value in mapqtag.\n"); #endif arr = val->u.array; for (i = 0; i < arr->size; i += 3) { struct pike_string *curname; #ifdef PIKE_DEBUG if (TYPEOF(arr->item[i]) != T_STRING) Pike_fatal ("Expected string as name in mapqtag.\n"); #endif curname = dmalloc_touch (struct pike_string *, arr->item[i].u.string); if (curname == name) { if (remove) if (arr->size == 3) { struct svalue tmp; SET_SVAL(tmp, T_STRING, 0, string, prefix); map_delete (map, &tmp); } else { if (arr->refs > 1 || mapping_data_is_shared (map)) { push_array (arr = copy_array (arr)); mapping_string_insert (map, prefix, sp - 1); pop_stack(); } free_svalues (arr->item+i, 3, BIT_MIXED); memmove (arr->item+i, arr->item+i+3, (arr->size-i-3) * sizeof(struct svalue)); arr->size -= 3; } else { if (arr->refs > 1 || mapping_data_is_shared (map)) { push_array (arr = copy_array (arr)); mapping_string_insert (map, prefix, sp - 1); pop_stack(); } assign_svalue (arr->item+i+1, sp-2); assign_svalue (arr->item+i+2, sp-1); } pop_n_elems (args); goto done; } else if (curname->len < name->len && !remove) { struct pike_string *cmp = string_slice (name, 0, curname->len); if (cmp == curname) { /* Found a shorter prefix to name; insert before. */ free_string (cmp); if (arr->refs > 1 || mapping_data_is_shared (map)) { arr = copy_array (arr); push_array (arr = resize_array (arr, arr->size+3)); mapping_string_insert (map, prefix, sp - 1); pop_stack(); } else arr = val->u.array = resize_array (arr, arr->size+3); memmove (arr->item+i+3, arr->item+i, (arr->size-i-3) * sizeof(struct svalue)); memcpy (arr->item+i, sp-=3, 3 * sizeof(struct svalue)); goto done; } else free_string (cmp); } } if (!remove) { if (arr->refs > 1 || mapping_data_is_shared (map)) { arr = copy_array (arr); push_array (arr = resize_array (arr, arr->size+3)); mapping_string_insert (map, prefix, sp - 1); pop_stack(); } else arr = val->u.array = resize_array (arr, arr->size+3); memcpy (arr->item+arr->size-3, sp-=3, 3 * sizeof(struct svalue)); } done: ; } else if (!remove) { f_aggregate (3); mapping_string_insert (map, prefix, sp-1); pop_stack(); } free_string (prefix); UNSET_ONERROR (uwp); ref_push_object(THISOBJ); } static void html_add_tags(INT32 args) { INT32 e; struct keypair *k; struct mapping_data *md; check_all_args("add_tags",args,BIT_MAPPING,0); md = sp[-1].u.mapping->data; NEW_MAPPING_LOOP(md) { push_svalue(&k->ind); push_svalue(&k->val); html_add_tag(2); pop_stack(); } pop_n_elems(args); ref_push_object(THISOBJ); } static void html_add_containers(INT32 args) { INT32 e; struct keypair *k; struct mapping_data *md; check_all_args("add_containers",args,BIT_MAPPING,0); md = sp[-1].u.mapping->data; NEW_MAPPING_LOOP(md) { push_svalue(&k->ind); push_svalue(&k->val); html_add_container(2); pop_stack(); } pop_n_elems(args); ref_push_object(THISOBJ); } static void html_add_entities(INT32 args) { INT32 e; struct keypair *k; struct mapping_data *md; check_all_args("add_entities",args,BIT_MAPPING,0); md = sp[-1].u.mapping->data; NEW_MAPPING_LOOP(md) { push_svalue(&k->ind); push_svalue(&k->val); html_add_entity(2); pop_stack(); } pop_n_elems(args); ref_push_object(THISOBJ); } /*! @decl Parser.HTML clear_tags() *! @decl Parser.HTML clear_containers() *! @decl Parser.HTML clear_entities() *! @decl Parser.HTML clear_quote_tags() *! *! Removes all registered definitions in the different categories. *! *! @returns *! Returns the object being called. *! *! @seealso *! @[add_tag], @[add_tags], @[add_container], @[add_containers], *! @[add_entity], @[add_entities] */ static void html_clear_tags (INT32 args) { pop_n_elems(args); free_mapping (THIS->maptag); THIS->maptag = allocate_mapping (32); ref_push_object (THISOBJ); } static void html_clear_containers (INT32 args) { pop_n_elems(args); free_mapping (THIS->mapcont); THIS->mapcont = allocate_mapping (32); ref_push_object (THISOBJ); } static void html_clear_entities (INT32 args) { pop_n_elems(args); free_mapping (THIS->mapentity); THIS->mapentity = allocate_mapping (32); ref_push_object (THISOBJ); } static void html_clear_quote_tags (INT32 args) { pop_n_elems(args); free_mapping (THIS->mapqtag); THIS->mapqtag = allocate_mapping (32); ref_push_object (THISOBJ); } /*! @decl mapping(string:mixed) tags() *! @decl mapping(string:mixed) containers() *! @decl mapping(string:mixed) entities() *! *! Returns the current callback settings. When matching is done case *! insensitively, all names will be returned in lowercase. *! *! Implementation note: These run in constant time since they return *! copy-on-write mappings. *! *! @seealso *! @[add_tag], @[add_tags], @[add_container], @[add_containers], *! @[add_entity], @[add_entities] */ static void html_tags(INT32 args) { pop_n_elems(args); push_mapping(copy_mapping(THIS->maptag)); /* deferred copy */ } static void html_containers(INT32 args) { pop_n_elems(args); push_mapping(copy_mapping(THIS->mapcont)); /* deferred copy */ } static void html_entities(INT32 args) { pop_n_elems(args); push_mapping(copy_mapping(THIS->mapentity)); /* deferred copy */ } /*! @decl mapping(string:array(mixed|string)) quote_tags() *! *! Returns the current callback settings. The values are arrays *! ({callback, end_quote}). When matching is done case insensitively, *! all names will be returned in lowercase. *! *! Implementation note: @[quote_tags()] allocates a new mapping for *! every call and thus, unlike e.g. @[tags()] runs in linear time. *! *! @seealso *! @[add_quote_tag] */ static void html_quote_tags(INT32 args) { struct mapping *res = allocate_mapping (32); INT32 e; struct keypair *k; struct mapping_data *md = THIS->mapqtag->data; pop_n_elems(args); NEW_MAPPING_LOOP(md) { int i; struct array *arr = k->val.u.array; for (i = 0; i < arr->size; i += 3) { struct pike_string *end; push_svalue (arr->item+i+1); #ifdef PIKE_DEBUG if (TYPEOF(arr->item[i+2]) != T_STRING) Pike_fatal ("Expected string as end in mapqtag.\n"); #endif end = arr->item[i+2].u.string; push_string (string_slice (end, 0, end->len-1)); f_aggregate (2); mapping_insert (res, arr->item+i, sp-1); pop_stack(); } } push_mapping (res); } /* ---------------------------------------- */ /* helper function to figure out what to do */ static INLINE void recheck_scan(struct parser_html_storage *this, int *scan_entity) { if (TYPEOF(this->callback__entity) != T_INT || m_sizeof(this->mapentity)) *scan_entity=1; else *scan_entity=0; } /* -------------- */ /* feed to output */ static void put_out_feed(struct parser_html_storage *this, struct svalue *v) { struct out_piece *f; #ifdef PIKE_DEBUG if (TYPEOF(*v) != T_STRING && this->out_max_shift >= 0) Pike_fatal ("Putting a non-string into output queue in non-mixed mode.\n"); #endif f = alloc_out_piece(); assign_svalue_no_free(&f->v,v); f->next=NULL; if (this->out==NULL) this->out=this->out_end=f; else { this->out_end->next=f; this->out_end=f; } if (this->out_max_shift >= 0) { this->out_max_shift = MAXIMUM (this->out_max_shift, v->u.string->size_shift); this->out_length += v->u.string->len; } else this->out_length++; } /* ---------------------------- */ /* feed range in feed to output */ static void put_out_feed_range(struct parser_html_storage *this, struct piece *head, ptrdiff_t c_head, struct piece *tail, ptrdiff_t c_tail) { DEBUG((stderr,"put out feed range " "%p:%"PRINTPTRDIFFT"d - %p:%"PRINTPTRDIFFT"d\n", head,c_head,tail,c_tail)); /* fit it in range (this allows other code to ignore eof stuff) */ if (c_tail>tail->s->len) c_tail=tail->s->len; if (head != tail && c_head) { if (head->s->len-c_head) /* Ignore empty strings. */ { push_string(string_slice(head->s,c_head,head->s->len-c_head)); put_out_feed(this,sp-1); pop_stack(); } c_head=0; head=head->next; } while (1) { if (head==tail) { if (c_tail-c_head) /* Ignore empty strings. */ { push_string(string_slice(head->s,c_head,c_tail-c_head)); put_out_feed(this,sp-1); pop_stack(); } return; } #ifdef PIKE_DEBUG if (!head) Pike_fatal("internal error: tail not found in feed (put_out_feed_range)\n"); #endif /* Should never have empty strings in the feed. */ ref_push_string(head->s); put_out_feed(this,sp-1); pop_stack(); head=head->next; } UNREACHABLE(); } /* ------------------------ */ /* push feed range on stack */ static INLINE int low_push_feed_range(struct piece *head, ptrdiff_t c_head, struct piece *tail, ptrdiff_t c_tail) { int n=0; /* fit it in range (this allows other code to ignore eof stuff) */ if (c_tail>tail->s->len) c_tail=tail->s->len; if (head != tail && c_head) { if (head->s->len - c_head) { push_string(string_slice(head->s,c_head,head->s->len-c_head)); n++; } c_head = 0; head = head->next; } while (1) { if (head==tail) { if (c_head < c_tail) { push_string(string_slice(head->s,c_head,c_tail-c_head)); n++; } break; } #ifdef PIKE_DEBUG if (!head) Pike_fatal("internal error: tail not found in feed (push_feed_range)\n"); #endif ref_push_string(head->s); n++; if (n==32) { f_add(32); n=1; } head=head->next; } if (!n) { DEBUG((stderr,"push empty\n")); return 0; } else if (n>1) f_add(n); DEBUG((stderr,"push len=%"PRINTPTRDIFFT"d\n",sp[-1].u.string->len)); return 1; } static INLINE void push_feed_range(struct piece *head, ptrdiff_t c_head, struct piece *tail, ptrdiff_t c_tail) { if (!low_push_feed_range(head, c_head, tail, c_tail)) ref_push_string(empty_pike_string); } /* -------------------------------------------------------- */ /* go forward by adjusting for a positive displacement in c */ #define FORWARD_CHAR(feed, c, dest, dp) do { \ (dest) = (struct piece *) (feed); \ (dp) = (ptrdiff_t) (c) + 1; \ while ((dp) == (dest)->s->len && (dest)->next) { \ (dp) = 0; \ (dest) = (dest)->next; \ } \ } while (0) static INLINE int n_pos_forward (struct piece *feed, ptrdiff_t c, struct piece **dest, ptrdiff_t *dp) { while (feed->s->len <= c) { if (!feed->next) { *dest = feed; *dp = feed->s->len; return 0; } c -= feed->s->len; feed = feed->next; } *dest = feed; *dp = c; return 1; } /* ------------------------- */ /* compare positions in feed */ static INLINE int cmp_feed_pos(struct piece *piece_a, ptrdiff_t pos_a, struct piece *piece_b, ptrdiff_t pos_b) { struct piece *a_save = piece_a; if (piece_a == piece_b) return pos_a < pos_b ? -1 : (pos_a > pos_b ? 1 : 0); while (piece_a && piece_a != piece_b) piece_a = piece_a->next; if (piece_a) return -1; while (piece_b && piece_b != a_save) piece_b = piece_b->next; if (piece_b) return 1; return 17; /* Not in the same feed! */ } /* ------------------------------------ */ /* skip feed range and count lines, etc */ /* count lines, etc */ static INLINE void skip_piece_range(struct location *loc, struct piece *p, ptrdiff_t start, ptrdiff_t stop) { int b=loc->byteno; switch (p->s->size_shift) { #define LOOP(TYPE) \ { \ TYPE *s=(TYPE *)p->s->str + start; \ for (;start<stop;start++) \ { \ if (*(s++)=='\n') \ { \ loc->linestart=b; \ loc->lineno++; \ } \ b++; \ } \ } case 0: LOOP (p_wchar0); break; case 1: LOOP (p_wchar1); break; case 2: LOOP (p_wchar2); break; #undef LOOP #ifdef PIKE_DEBUG default: Pike_fatal("unknown width of string\n"); #endif } loc->byteno=b; } static void skip_feed_range(struct feed_stack *st, struct piece **headp, ptrdiff_t *c_headp, struct piece *tail, ptrdiff_t c_tail) { struct piece *head=*headp; ptrdiff_t c_head=*c_headp; if (!*headp) { DEBUG((stderr,"skip_feed_range: already at end<tm>\n")); return; } DEBUG_MARK_SPOT("skip_feed_range from",*headp,*c_headp); DEBUG_MARK_SPOT(" to",tail,c_tail); while (head) { if (head==tail && c_tail<tail->s->len) { skip_piece_range(&(st->pos),head,c_head,c_tail); *headp = head; *c_headp=c_tail; return; } skip_piece_range(&(st->pos),head,c_head,head->s->len); { struct piece *next = head->next; really_free_piece (head); head = next; } c_head=0; } *headp = head; *c_headp = 0; } static p_wchar2 next_character(struct piece *feed, ptrdiff_t pos) { FORWARD_CHAR(feed,pos,feed,pos); if (pos==feed->s->len) return 0; /* in lack of anything better */ return index_shared_string(feed->s,pos); } /* ------------------------------ */ /* scan forward for certain chars */ static int scan_forward(struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, const p_wchar2 *look_for, ptrdiff_t num_look_for) /* negative = skip those */ { int rev=0; if (num_look_for<0) num_look_for=-num_look_for,rev=1; #ifdef HTML_DEBUG if (THIS->flags & FLAG_DEBUG_MODE) { DEBUG_MARK_SPOT("scan_forward",feed,c); fprintf(stderr," n=%"PRINTPTRDIFFT"d%s; ",num_look_for,rev?"; rev":""); debug_print_chars (look_for, num_look_for); } #define SCAN_DEBUG_MARK_SPOT(A,B,C) DEBUG_MARK_SPOT(A,B,C) #else #define SCAN_DEBUG_MARK_SPOT(A,B,C) do {} while (0); #endif while (c >= feed->s->len) { c -= feed->s->len; if (!feed->next) { *destp = feed; *d_p = feed->s->len; SCAN_DEBUG_MARK_SPOT("scan_forward end (start offset beyond feed end)", *destp,*d_p); return 0; } feed = feed->next; } switch (num_look_for) { case 0: /* optimize, skip to end */ while (feed->next) feed=feed->next; *destp=feed; *d_p=feed->s->len; SCAN_DEBUG_MARK_SPOT("scan_forward end (nothing to look for)", *destp,*d_p); return 0; /* not found :-) */ case 1: if (!rev) { while (feed) { ptrdiff_t ce = feed->s->len - c; p_wchar2 f=(p_wchar2)*look_for; SCAN_DEBUG_MARK_SPOT("scan_forward piece loop (1)",feed,c); switch (feed->s->size_shift) { #define LOOP(TYPE) \ { \ TYPE *s=((TYPE *)feed->s->str)+c; \ while (ce--) \ if ((p_wchar2)*(s++)==f) \ { \ c=feed->s->len-ce; \ goto found; \ } \ } case 0: LOOP (p_wchar0); break; case 1: LOOP (p_wchar1); break; case 2: LOOP (p_wchar2); break; #undef LOOP #ifdef PIKE_DEBUG default: Pike_fatal("unknown width of string\n"); #endif } if (!feed->next) break; c=0; feed=feed->next; } break; } /* FALL THROUGH */ default: /* num_look_for > 1 */ while (feed) { ptrdiff_t ce = feed->s->len - c; SCAN_DEBUG_MARK_SPOT("scan_forward piece loop (>1)",feed,c); switch (feed->s->size_shift) { #define LOOP(TYPE) \ { \ int n; \ TYPE *s=((TYPE *)feed->s->str)+c; \ while (ce--) \ { \ for (n=0; n<num_look_for; n++) \ if (((p_wchar2)*s)==look_for[n]) \ { \ c=feed->s->len-ce; \ if (!rev) goto found; else break; \ } \ if (rev && n==num_look_for) goto found; \ s++; \ } \ } case 0: LOOP (p_wchar0); break; case 1: LOOP (p_wchar1); break; case 2: LOOP (p_wchar2); break; #undef LOOP #ifdef PIKE_DEBUG default: Pike_fatal("unknown width of string\n"); #endif } if (!feed->next) break; c=0; feed=feed->next; } break; } SCAN_DEBUG_MARK_SPOT("scan_forward not found",feed,feed->s->len); *destp=feed; *d_p=feed->s->len; return 0; /* not found */ found: c-=!rev; while (c == feed->s->len && feed->next) { c = 0; feed = feed->next; } *destp=feed; *d_p=c; SCAN_DEBUG_MARK_SPOT("scan_forward found",feed,c); return 1; } static int scan_for_string (struct parser_html_storage *UNUSED(this), struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, struct pike_string *str) { if (!str->len) { *destp = feed; *d_p = c; return 1; } #define LOOP(SHIFT) { \ p_wchar2 look_for = INDEX_CHARP(str->str, 0, SHIFT); \ for (;;) { \ PIKE_CONCAT(p_wchar, SHIFT) *p, *e; \ struct piece *dst; \ ptrdiff_t cdst; \ if (!scan_forward (feed, c, &feed, &c, &look_for, 1)) { \ *destp = feed; \ *d_p = c; \ return 0; \ } \ \ p = ((PIKE_CONCAT(p_wchar, SHIFT) *) str->str) + 1; \ e = ((PIKE_CONCAT(p_wchar, SHIFT) *) str->str) + str->len; \ dst = feed; \ cdst = c + 1; \ for (; p < e; p++, cdst++) { \ while (cdst == dst->s->len) { \ if (dst->next) dst = dst->next; \ else { \ *destp = dst; \ *d_p = dst->s->len; \ return 0; \ } \ cdst = 0; \ } \ if ((p_wchar2) *p != \ INDEX_CHARP (dst->s->str, cdst, dst->s->size_shift)) \ goto PIKE_CONCAT(cont, SHIFT); \ } \ \ *destp = feed; \ *d_p = c; \ return 1; \ \ PIKE_CONCAT(cont, SHIFT): \ c++; \ } \ } switch (str->size_shift) { case 0: LOOP(0); break; case 1: LOOP(1); break; case 2: LOOP(2); break; #ifdef PIKE_DEBUG default: Pike_fatal ("Unknown width of string.\n"); #endif } #undef LOOP return 0; } enum scan_arg_do {SCAN_ARG_ONLY, SCAN_ARG_PUSH, SCAN_ARG_ENT_BREAK}; static int scan_forward_arg(struct parser_html_storage *this, struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, enum scan_arg_do what, int scan_name, /* Break on "=" if outside quotes. */ int finished, int *quote) /* Returns 1 if end is found, 2 if broken for entity, 0 otherwise. If * 2 is returned, *quote is set to the index in this->argq_start for * the current quote we're in, or -1 if outside quotes. *quote is also * read on entry to continue inside quotes. */ { p_wchar2 ch=0; int res; size_t i; int n=0; int q=0; DEBUG_MARK_SPOT("scan_forward_arg: start",feed,c); if (quote && *quote >= 0) { *destp = feed; *d_p = c-1; i = *quote; goto in_quote_cont; /* jump right into the loop */ } for (;;) { /* we are here: */ /* < f'o'"o" = bar > */ /* ^ -> */ /* this is the end */ DEBUG_MARK_SPOT("scan_forward_arg: loop",feed,c); res=scan_forward(feed,c,destp,d_p, ARG_BREAK_CHARS (this), N_ARG_BREAK_CHARS (this)); retryloop: if (res) { ch=index_shared_string(destp[0]->s,*d_p); if ((this->flags & FLAG_IGNORE_COMMENTS) && ch=='-') /* possible --...-- to be ignored */ { if (next_character(*destp,*d_p)=='-') { static const p_wchar2 minus='-'; if (what == SCAN_ARG_PUSH) n += low_push_feed_range(feed,c,*destp,*d_p); /* skip to next -- */ DEBUG_MARK_SPOT("scan_forward_arg: " "found --",*destp,*d_p); FORWARD_CHAR (*destp, *d_p, *destp, *d_p); for (;;) { res=scan_forward(*destp,d_p[0]+1,destp,d_p,&minus,1); if (!res) { if (!finished) { DEBUG_MARK_SPOT("scan_forward_arg: " "wait for --",*destp,*d_p); if (what == SCAN_ARG_PUSH) pop_n_elems(n); return 0; } else { DEBUG_MARK_SPOT("scan_forward_arg: " "forced end in --...--",destp[0],*d_p); break; } } if (next_character(*destp,*d_p)=='-') { DEBUG_MARK_SPOT("scan_forward_arg: " "found -- end",*destp,*d_p); d_p[0]++; goto next; } DEBUG_MARK_SPOT("scan_forward_arg: " "not -- end, cont",*destp,*d_p); } break; } else { DEBUG_MARK_SPOT("scan_forward_arg: " "found -, not -",*destp,*d_p); res=scan_forward(*destp,d_p[0]+1,destp,d_p, ARG_BREAK_CHARS (this), N_ARG_BREAK_CHARS (this)); goto retryloop; } } } if (what == SCAN_ARG_PUSH) n += low_push_feed_range(feed,c,*destp,*d_p); if (!res) { if (!finished) { DEBUG_MARK_SPOT("scan_forward_arg: wait",feed,c); if (what == SCAN_ARG_PUSH) pop_n_elems(n); return 0; } else { DEBUG_MARK_SPOT("scan_forward_arg: forced end",destp[0],*d_p); break; } } if (ch == ARG_EQ (this)) { if (scan_name) { DEBUG_MARK_SPOT("scan_forward_arg: end by arg_eq", destp[0],*d_p); break; } else { DEBUG_MARK_SPOT("scan_forward_arg: = ignored in arg val", destp[0],*d_p); if (what == SCAN_ARG_PUSH) n += low_push_feed_range(*destp,*d_p,*destp,*d_p+1); goto next; } } if (ch == TAG_END (this)) { if ((this->flags & FLAG_MATCH_TAG) && q--) { DEBUG_MARK_SPOT("scan_forward_arg: inner tag end", destp[0],*d_p); if (what == SCAN_ARG_PUSH) n += low_push_feed_range(*destp,*d_p,*destp,*d_p+1); goto next; } else { DEBUG_MARK_SPOT("scan_forward_arg: end by tag end", destp[0],*d_p); break; } } if ((this->flags & FLAG_MATCH_TAG) && ch == TAG_START (this)) { DEBUG_MARK_SPOT("scan_forward_arg: inner tag start", destp[0],*d_p); q++; if (what == SCAN_ARG_PUSH) n += low_push_feed_range(*destp,*d_p,*destp,*d_p+1); goto next; } if (ch == ENTITY_START (this)) { DEBUG_MARK_SPOT("scan_forward_arg: entity start char", destp[0],*d_p); if (what == SCAN_ARG_ENT_BREAK) { if (quote) *quote = -1; return 2; } else { if (what == SCAN_ARG_PUSH) n += low_push_feed_range(*destp,*d_p,*destp,*d_p+1); goto next; } } /* scan for (possible) end(s) of this argument quote */ for (i=0; i < NARGQ (this); i++) if (ch == ARGQ_START (this)[i]) break; if (i == NARGQ (this)) { if (ch == TAG_FIN (this)) { FORWARD_CHAR (*destp, *d_p, feed, c); if (((this->flags & FLAG_MATCH_TAG) && q) || index_shared_string (feed->s, c) != TAG_END (this)) { DEBUG_MARK_SPOT("scan_forward_arg: tag fin char", destp[0],*d_p); if (what == SCAN_ARG_PUSH) n += low_push_feed_range (*destp, *d_p, feed, c); goto next; } else { DEBUG_MARK_SPOT("scan_forward_arg: end by tag fin", destp[0],*d_p); break; } } else { DEBUG_MARK_SPOT("scan_forward_arg: end by ws", destp[0],*d_p); break; } } in_quote_cont: DEBUG_MARK_SPOT("scan_forward_arg: quoted",destp[0],*d_p); while (1) { res=scan_forward(feed=*destp,c=d_p[0]+1,destp,d_p, LOOK_FOR_END (this)[i], NUM_LOOK_FOR_END (this)[i]); if (what == SCAN_ARG_PUSH) n += low_push_feed_range(feed,c,*destp,*d_p); if (!res) { if (!finished) { DEBUG_MARK_SPOT("scan_forward_arg: wait (quote)",feed,c); if (what == SCAN_ARG_PUSH) pop_n_elems(n); return 0; } else { DEBUG_MARK_SPOT("scan_forward_arg: forced end (quote)", destp[0], *d_p); if (this->flags & FLAG_QUOTE_STAPLING) break; goto end; } } if (index_shared_string(destp[0]->s,*d_p) == ENTITY_START (this)) { DEBUG_MARK_SPOT("scan_forward_arg: entity start char", destp[0],*d_p); if (what == SCAN_ARG_ENT_BREAK) { if (quote) *quote = i; return 2; } else { if (what == SCAN_ARG_PUSH) n += low_push_feed_range(*destp,*d_p,*destp,*d_p+1); continue; } } if (this->flags & FLAG_QUOTE_STAPLING) break; FORWARD_CHAR (*destp, *d_p, *destp, *d_p); DEBUG_MARK_SPOT("scan_forward_arg: End of quoted string", destp[0],*d_p); goto end; } next: if (n > 20) { if (this->flags & FLAG_QUOTE_STAPLING) { fprintf(stderr, "Parser.HTML: Warning: Old-style attribute stapling.\n"); } f_add(n); n = 1; } feed=*destp; c=d_p[0]+1; } end: if (what == SCAN_ARG_PUSH) { if (n>1) { if (this->flags & FLAG_QUOTE_STAPLING) { fprintf(stderr, "Parser.HTML: Warning: Old-style attribute stapling.\n"); } f_add(n); } else if (!n) ref_push_string(empty_pike_string); } return 1; } static int scan_for_end_of_tag(struct parser_html_storage *this, struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, int finished, int match_tag, int *got_fin) /* match_tag == 0: don't match inner tags, > 0: match inner tags, < 0: * consider it an unbalanced tag and break. got_fin is assigned * nonzero if there's a '/' before the tag end, zero otherwise. */ { p_wchar2 ch; int res; size_t i; int q=0; /* maybe these should be cached */ /* bla bla <tag foo 'bar' "gazonk" > */ /* ^ ^ */ /* here now scan here */ DEBUG((stderr,"scan for end of tag: %p:%"PRINTPTRDIFFT"d\n",feed,c)); if (got_fin) *got_fin = 0; for (;;) { /* scan for start of argument quote or end of tag */ res=scan_forward(feed,c,destp,d_p, LOOK_FOR_START (this), NUM_LOOK_FOR_START (this)); if (!res) { if (!finished) { DEBUG((stderr,"scan for end of tag: " "wait at %p:%"PRINTPTRDIFFT"d\n",feed,c)); return 0; /* not found - no end of tag, yet */ } else { DEBUG((stderr,"scan for end of tag: " "forced end at %p:%"PRINTPTRDIFFT"d\n", destp[0],*d_p)); return 1; /* end of tag, sure... */ } } ch=index_shared_string(destp[0]->s,*d_p); if (ch == ARG_EQ (this)) { DEBUG_MARK_SPOT("scan for end of tag: arg_eq", destp[0],*d_p); feed=*destp; c=d_p[0]+1; continue; } if (ch == TAG_FIN (this)) { DEBUG_MARK_SPOT("scan for end of tag: tag_fin", destp[0],*d_p); FORWARD_CHAR (*destp, *d_p, feed, c); if (match_tag && q) continue; else { ch = index_shared_string (feed->s, c); if (ch == TAG_END (this)) { if (got_fin) *got_fin = 1; *destp = feed; *d_p = c; DEBUG_MARK_SPOT("scan for end of tag: end by tag_fin + tag_end", destp[0],*d_p); return 1; } else continue; } } if (ch == TAG_END (this)) { if (match_tag && q--) { DEBUG_MARK_SPOT("scan for end of tag: inner tag end", destp[0],*d_p); feed=*destp; c=d_p[0]+1; continue; /* Aja baja /hubbe: //scan more */ } else { DEBUG_MARK_SPOT("scan for end of tag: end by tag end", destp[0],*d_p); return 1; } } if (ch == TAG_START (this)) { if (match_tag > 0) { DEBUG_MARK_SPOT("scan for end of tag: inner tag start", destp[0],*d_p); q++; feed=*destp; c=d_p[0]+1; continue; } else if (match_tag < 0) { DEBUG_MARK_SPOT("scan for end of tag: unbalanced tag start", destp[0],*d_p); return 1; } else { DEBUG_MARK_SPOT("scan for end of tag: ignored inner tag start", destp[0],*d_p); feed=*destp; c=d_p[0]+1; continue; } } /* scan for (possible) end(s) of this argument quote */ for (i=0; i < NARGQ (this); i++) if (ch == ARGQ_START (this)[i]) { do { res = scan_forward(*destp, d_p[0]+1, destp, d_p, LOOK_FOR_END (this)[i], NUM_LOOK_FOR_END (this)[i]); if (!res) { if (!finished) { DEBUG((stderr,"scan for end of tag: " "wait at %p:%"PRINTPTRDIFFT"d\n", destp[0],*d_p)); return 0; /* not found - no end of tag, yet */ } else { DEBUG((stderr,"scan for end of tag: " "forced end at %p:%"PRINTPTRDIFFT"d\n", feed,c)); return 1; /* end of tag, sure... */ } } } while (index_shared_string(destp[0]->s, *d_p) == ENTITY_START (this)); feed=*destp; c=d_p[0]+1; break; } } } /* ---------------------------------- */ struct chr_buf_len2 { p_wchar2 str[2]; struct piece *p[2]; ptrdiff_t c[2]; }; static int quote_tag_lookup (struct parser_html_storage *this, struct piece *feed, ptrdiff_t c, struct piece **destp, ptrdiff_t *d_p, int finished, struct svalue **mapqentry) /* Checks for a quote tag starting at the given position. If one is * found, scans to the end of it and sets *mapqentry to the first * svalue in the ({name, to_do, end}) tuple in this->mapqtag. */ { struct chr_buf_len2 buf; struct piece *dst = feed; ptrdiff_t cdst = c; size_t checklen; *mapqentry = NULL; DEBUG_MARK_SPOT ("quote tag lookup", feed, c); for (checklen = 0; checklen < NELEM (buf.str); checklen++) { while (cdst == dst->s->len) { if (!(dst = dst->next)) { /* This is not entirely correct; we should continue if mapqtag * doesn't contain any longer indices whose prefixes match * what we got so far. But it's not much of a problem as long * as we're indexing on only two chars or less. */ DEBUG ((stderr, "quote tag lookup: wait at prefix\n")); return finished; /* 0 => wait, 1 => no go - *mapqentry still NULL */ } cdst = 0; } buf.str[checklen] = index_shared_string (dst->s, cdst); buf.p[checklen] = dst; buf.c[checklen] = ++cdst; } for (; checklen; checklen--) { struct pike_string *indstr = make_shared_binary_string2 (buf.str, checklen); struct svalue *val = low_mapping_string_lookup (this->mapqtag, indstr); free_string (indstr); if (val) { int i; struct array *arr; DEBUG ((stderr, "quote tag lookup: found entry %c%c at %"PRINTSIZET"u\n", isprint (buf.str[0]) ? buf.str[0] : '.', isprint (buf.str[1]) ? buf.str[1] : '.', checklen)); #ifdef PIKE_DEBUG if (TYPEOF(*val) != T_ARRAY) Pike_fatal ("Expected array as value in mapqtag.\n"); #endif arr = val->u.array; for (i = 0; i < arr->size; i += 3) { struct pike_string *tag; #ifdef PIKE_DEBUG if (TYPEOF(arr->item[i]) != T_STRING) Pike_fatal ("Expected string as name in mapqtag.\n"); #endif tag = arr->item[i].u.string; dst = buf.p[checklen-1]; cdst = buf.c[checklen-1]; #define LOOP(TYPE) { \ TYPE *p = (TYPE *) tag->str + checklen; \ TYPE *e = (TYPE *) tag->str + tag->len; \ for (; p < e; p++, cdst++) { \ while (cdst == dst->s->len) { \ if (!(dst = dst->next)) { \ DEBUG ((stderr, "quote tag lookup: wait\n")); \ return finished; /* 0/1 => see above */ \ } \ cdst = 0; \ } \ if ((p_wchar2) *p != \ INDEX_CHARP (dst->s->str, cdst, dst->s->size_shift)) \ goto cont; \ } \ } switch (tag->size_shift) { case 0: LOOP (p_wchar0); break; case 1: LOOP (p_wchar1); break; case 2: LOOP (p_wchar2); break; #ifdef PIKE_DEBUG default: Pike_fatal ("Unknown width of string.\n"); #endif } #undef LOOP DEBUG_MARK_SPOT ("quote tag lookup: matched quote tag", dst, cdst); *mapqentry = arr->item+i; *destp = dst; *d_p = cdst; return 1; cont: ; } } #ifdef HTML_DEBUG else DEBUG ((stderr, "quote tag lookup: no entry %c%c at %"PRINTSIZET"u\n", isprint (buf.str[0]) ? buf.str[0] : '.', isprint (buf.str[1]) ? buf.str[1] : '.', checklen)); #endif } DEBUG ((stderr, "quote tag lookup: no quote tag\n")); return 1; /* 1 => no go - *mapqentry still NULL */ } static INLINE void low_add_local_feed (struct parser_html_storage *this, struct piece *feed) { /* Note: Calling code assumes that this alloc never fails with an * exception or a zero value (i.e. it exits the process immediately * instead). */ struct feed_stack *new = alloc_feed_stack(); new->local_feed=feed; new->ignore_data=0; new->parse_tags=this->stack->parse_tags && this->out_ctx == CTX_DATA; new->pos=init_pos; new->prev=this->stack; new->c=0; this->stack=new; this->stack_count++; } static INLINE void add_local_feed (struct parser_html_storage *this, struct pike_string *str) { struct piece *feed = alloc_piece(); copy_shared_string(feed->s,str); low_add_local_feed (this, feed); } /* ---------------------------------------------------------------- */ /* this is called to get data from callbacks and do the right thing */ static newstate handle_result(struct parser_html_storage *this, struct feed_stack *st, struct piece **head, ptrdiff_t *c_head, struct piece *tail, ptrdiff_t c_tail, int skip) { int i; /* on sp[-1]: string: push it to feed stack int: noop, output range array(string): output string */ switch (TYPEOF(sp[-1])) { case T_STRING: /* push it to feed stack */ /* first skip this in local feed*/ if (skip) skip_feed_range(st,head,c_head,tail,c_tail); if (sp[-1].u.string->len) { DEBUG((stderr,"handle_result: pushing string " "(len=%"PRINTPTRDIFFT"d) on feedstack\n", sp[-1].u.string->len)); add_local_feed (this, sp[-1].u.string); pop_stack(); return STATE_REREAD; /* please reread stack head */ } else { DEBUG((stderr,"handle_result: not pushing empty string on feedstack\n")); pop_stack(); if (this->stack != st) /* got more feed recursively - reread */ return STATE_REREAD; return STATE_DONE; /* continue */ } case T_INT: switch (sp[-1].u.integer) { case 0: if ((this->type == TYPE_TAG || this->type == TYPE_CONT) && (TYPEOF(this->callback__entity) != T_INT || m_sizeof (this->mapentity))) { /* If it's a tag and we got entities, just output the * tag starter and name and switch to CTX_TAG to * parse any entities in the tag. */ struct piece *pos; ptrdiff_t cpos; if (this->flags & FLAG_WS_BEFORE_TAG_NAME) scan_forward (*head, *c_head + 1, &pos, &cpos, WS(this), -(ptrdiff_t)N_WS(this)); else pos = *head, cpos = *c_head + 1; scan_forward_arg (this, pos, cpos, &pos, &cpos, SCAN_ARG_ONLY, 1, 1, NULL); put_out_feed_range(this,*head,*c_head,pos,cpos); if (skip) skip_feed_range(st,head,c_head,pos,cpos); this->out_ctx = CTX_TAG; return STATE_REREAD; } else if (*head) { /* just output the whole range */ put_out_feed_range(this,*head,*c_head,tail,c_tail); if (skip) skip_feed_range(st,head,c_head,tail,c_tail); } pop_stack(); if (this->stack != st) /* got more feed recursively - reread */ return STATE_REREAD; return STATE_DONE; /* continue */ case 1: /* reparse the last thing */ pop_stack(); return STATE_REPARSE; } Pike_error("Parser.HTML: illegal result from callback: %"PRINTPIKEINT"d, " "not 0 (skip) or 1 (reparse)\n", sp[-1].u.integer); case T_ARRAY: /* output element(s) */ for (i=0; i<sp[-1].u.array->size; i++) { if (THIS->out_max_shift >= 0 && TYPEOF(sp[-1].u.array->item[i]) != T_STRING) Pike_error("Parser.HTML: illegal result from callback: " "element in array not string\n"); push_svalue(sp[-1].u.array->item+i); put_out_feed(this,sp-1); pop_stack(); } if (skip) skip_feed_range(st,head,c_head,tail,c_tail); pop_stack(); if (this->stack != st) /* got more feed recursively - reread */ return STATE_REREAD; return STATE_DONE; /* continue */ default: Pike_error("Parser.HTML: illegal result from callback: " "not 0, string or array\n"); } UNREACHABLE(return STATE_DONE); } static void clear_start(struct parser_html_storage *this) { this->start=NULL; } static void do_callback(struct parser_html_storage *this, struct object *thisobj, struct svalue *callback_function, struct piece *start, ptrdiff_t cstart, struct piece *end, ptrdiff_t cend) { ONERROR uwp; if (TYPEOF(*callback_function) != T_FUNCTION && TYPEOF(*callback_function) != T_PROGRAM) { push_svalue(callback_function); this->start=NULL; return; } this->start=start; this->cstart=cstart; this->end=end; this->cend=cend; SET_ONERROR(uwp,clear_start,this); ref_push_object(thisobj); push_feed_range(start,cstart,end,cend); if (this->extra_args) { add_ref(this->extra_args); push_array_items(this->extra_args); DEBUG((stderr,"_-callback args=%d\n",2+this->extra_args->size)); dmalloc_touch_svalue(callback_function); apply_svalue(callback_function,2+this->extra_args->size); } else { DEBUG((stderr,"_-callback args=%d\n",2)); dmalloc_touch_svalue(callback_function); apply_svalue(callback_function,2); } UNSET_ONERROR(uwp); this->start=NULL; } struct uwp_pos { struct parser_html_storage *this; struct location orig_pos; }; static void restore_pos (struct uwp_pos *uwp_pos) { uwp_pos->this->top.pos = uwp_pos->orig_pos; } static newstate data_callback (struct parser_html_storage *this, struct object *thisobj, struct feed_stack *st) { newstate res; ptrdiff_t cstart = 0, cend; struct uwp_pos uwp_pos; ONERROR uwp; #ifdef PIKE_DEBUG if (TYPEOF(this->callback__data) == T_INT || !this->data_cb_feed) Pike_fatal ("data_callback called in bogus state.\n"); #endif cend = this->data_cb_feed_end->s->len; DEBUG((stderr, "%*d calling _data callback %p:0..%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, this->data_cb_feed, this->data_cb_feed_end, cend)); uwp_pos.this = this; uwp_pos.orig_pos = this->top.pos; SET_ONERROR (uwp, restore_pos, &uwp_pos); this->top.pos = this->data_cb_pos; this->type = TYPE_DATA; do_callback (this, thisobj, &(this->callback__data), this->data_cb_feed, 0, this->data_cb_feed_end, cend); UNSET_ONERROR (uwp); this->top.pos = uwp_pos.orig_pos; res = handle_result (this, st, &this->data_cb_feed, &cstart, this->data_cb_feed_end, cend, 0); if (res == STATE_REPARSE) { /* Known bug: Should really bring back the original feed to handle * this correctly. */ low_add_local_feed (this, this->data_cb_feed); this->data_cb_feed = NULL; return STATE_REREAD; } else { #ifdef PIKE_DEBUG if (res != STATE_DONE && res != STATE_REREAD) Pike_fatal ("Unexpected state after data callback.\n"); #endif do { struct piece *next = this->data_cb_feed->next; really_free_piece (this->data_cb_feed); this->data_cb_feed = next; } while (this->data_cb_feed); } return res; } #define CALL_CALLBACK(TYPESTR, PREPARE_SPEC) { \ int args; \ ONERROR uwp; \ newstate res; \ \ if (TYPEOF(*v) == T_STRING) { \ if (this->flags & FLAG_REPARSE_STRINGS) { \ add_local_feed (this, v->u.string); \ skip_feed_range(st,cutstart,ccutstart,cutend,ccutend); \ return STATE_REREAD; \ } \ else { \ if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed) { \ res = data_callback (this, thisobj, st); \ return res ? res : STATE_REREAD; \ } \ put_out_feed(this,v); \ skip_feed_range(st,cutstart,ccutstart,cutend,ccutend); \ return STATE_DONE; \ } \ } \ \ if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed) { \ res = data_callback (this, thisobj, st); \ return res ? res : STATE_REREAD; \ } \ \ switch (TYPEOF(*v)) \ { \ case T_FUNCTION: \ case T_OBJECT: \ push_svalue(v); \ break; \ case T_ARRAY: \ if (v->u.array->size) \ { \ push_svalue(v->u.array->item); \ break; \ } \ default: \ Pike_error("Parser.HTML: illegal type found " \ "when trying to call " TYPESTR " callback\n"); \ } \ \ this->start=*cutstart; \ this->cstart=*ccutstart; \ this->end=cutend; \ this->cend=ccutend; \ \ SET_ONERROR(uwp,clear_start,this); \ \ ref_push_object(thisobj); \ PREPARE_SPEC \ \ if (TYPEOF(*v)==T_ARRAY && v->u.array->size>1) \ { \ assign_svalues_no_free(sp,v->u.array->item+1, \ v->u.array->size-1, \ v->u.array->type_field); \ sp+=v->u.array->size-1; \ args+=v->u.array->size-1; \ } \ \ if (this->extra_args) \ { \ add_ref(this->extra_args); \ push_array_items(this->extra_args); \ args+=this->extra_args->size; \ } \ \ DEBUG((stderr,TYPESTR " callback args=%d\n",args)); \ f_call_function(args); \ \ UNSET_ONERROR(uwp); \ this->start=NULL; \ \ return handle_result(this,st,cutstart,ccutstart,cutend,ccutend,1); \ } static newstate entity_callback(struct parser_html_storage *this, struct object *thisobj, struct svalue *v, struct feed_stack *st, struct piece **cutstart, ptrdiff_t *ccutstart, struct piece *cutend, ptrdiff_t ccutend) { CALL_CALLBACK ("entity", { args=2; }); } static newstate tag_callback(struct parser_html_storage *this, struct object *thisobj, struct svalue *v, struct feed_stack *st, struct piece **cutstart, ptrdiff_t *ccutstart, struct piece *cutend, ptrdiff_t ccutend) { CALL_CALLBACK ("tag", { tag_args(this,this->start,this->cstart,NULL,1,1); args=3; this->type=TYPE_TAG; }); } static newstate container_callback(struct parser_html_storage *this, struct object *thisobj, struct svalue *v, struct piece *startc, ptrdiff_t cstartc, struct piece *endc, ptrdiff_t cendc, struct feed_stack *st, struct piece **cutstart, ptrdiff_t *ccutstart, struct piece *cutend, ptrdiff_t ccutend) { CALL_CALLBACK ("container", { tag_args(this,this->start,this->cstart,NULL,1,1); push_feed_range(startc,cstartc,endc,cendc); args=4; this->type=TYPE_CONT; }); } static newstate quote_tag_callback(struct parser_html_storage *this, struct object *thisobj, struct svalue *v, struct piece *startc, ptrdiff_t cstartc, struct piece *endc, ptrdiff_t cendc, struct feed_stack *st, struct piece **cutstart, ptrdiff_t *ccutstart, struct piece *cutend, ptrdiff_t ccutend) { CALL_CALLBACK ("quote tag", { push_feed_range(startc,cstartc,endc,cendc); args=3; this->type=TYPE_QTAG; }); } static newstate find_end_of_container(struct parser_html_storage *this, struct svalue *tagname, struct piece *feed, ptrdiff_t c, struct piece **e1, ptrdiff_t *ce1, struct piece **e2, ptrdiff_t *ce2, int finished) /* e1/ce1 is set to the first position of the end tag. e2/ce2 is set * to the first position after the end tag. Both are set to the end of * the feed if finished is set and an end tag wasn't found. */ { struct piece *s1,*s2,*s3; ptrdiff_t c1,c2,c3; newstate res; DEBUG_MARK_SPOT("find_end_of_container",feed,c); for (;;) { int found, endtag, got_fin; DEBUG_MARK_SPOT("find_end_of_cont : loop",feed,c); if (!scan_forward(feed,c,&s1,&c1,&TAG_START(this),1)) { if (!finished) { DEBUG_MARK_SPOT("find_end_of_cont : wait",s1,c1); return STATE_WAIT; /* please wait */ } else { DEBUG_MARK_SPOT("find_end_of_cont : forced end",s1,c1); *e1=*e2=s1; *ce1=*ce2=c1; return STATE_DONE; /* end of tag, sure... */ } } DEBUG_MARK_SPOT("find_end_of_cont : found tag",s1,c1); /* scan ws to start of tag name */ if (this->flags & FLAG_WS_BEFORE_TAG_NAME) { if (!scan_forward(s1,c1+1,&s2,&c2,WS(this), -(ptrdiff_t)N_WS(this))) { DEBUG_MARK_SPOT("find_end_of_cont : wait at pre tag ws",s2,c2); return STATE_WAIT; /* come again */ } } else FORWARD_CHAR (s1, c1, s2, c2); if (m_sizeof(this->mapqtag)) { /* must check nested quote tags, since they affect the syntax itself */ struct svalue *v; if (!quote_tag_lookup(this,s2,c2,&s3,&c3,finished,&v)) { DEBUG_MARK_SPOT("find_end_of_cont : wait at quote tag",s2,c2); return STATE_WAIT; /* come again */ } if (v) { DEBUG_MARK_SPOT("find_end_of_cont : quote tag",s2,c2); if (!scan_for_string(this,s3,c3,&s3,&c3,v[2].u.string)) { if (finished) { DEBUG_MARK_SPOT("find_end_of_cont : forced end in quote tag",s1,c1); *e1 = *e2 = s3; *ce1 = *ce2 = c3; return STATE_DONE; } else { DEBUG_MARK_SPOT("find_end_of_cont : wait in quote tag",s1,c1); return STATE_WAIT; } } n_pos_forward(s3,c3+v[2].u.string->len,&feed,&c); DEBUG_MARK_SPOT("find_end_of_cont : quote tag end",feed,c); continue; } } /* tag or end tag? */ endtag = index_shared_string (s2->s, c2) == TAG_FIN (this); if (endtag) c2++; /* scan tag name as argument and push */ if (!scan_forward_arg(this,s2,c2,&s3,&c3,SCAN_ARG_PUSH,1,finished,NULL)) { DEBUG_MARK_SPOT("find_end_of_cont : wait at tag name",s2,c2); return STATE_WAIT; /* come again */ } #ifdef HTML_DEBUG if (endtag) DEBUG_MARK_SPOT("find_end_of_cont : got end tag",s2,c2); else DEBUG_MARK_SPOT("find_end_of_cont : got tag",s2,c2); #endif if (this->flags & FLAG_CASE_INSENSITIVE_TAG) f_lower_case(1); found = is_eq(sp-1,tagname); /* When we should treat unknown tags as text, we have to parse * and lookup just the tag name before continuing. This is an * awkward situation, since there's no telling whether the * parser used for the contents will define the same tags. */ if (!found && (THIS->flags & FLAG_IGNORE_UNKNOWN)) { if (endtag) { struct pike_string *s; push_string (TAG_FIN_STRING (this)); s = add_shared_strings (sp[-1].u.string, sp[-2].u.string); pop_stack(); push_string (s); } else stack_dup(); if (!((m_sizeof(this->maptag) && (low_mapping_lookup(this->maptag,sp-1) || ((THIS->flags & (FLAG_XML_TAGS|FLAG_STRICT_TAGS)) == (FLAG_XML_TAGS|FLAG_STRICT_TAGS) && low_mapping_lookup(this->maptag,sp-2)))) || (m_sizeof(this->mapcont) && (low_mapping_lookup(this->mapcont,sp-1) || low_mapping_lookup(this->mapcont,sp-2))))) { DEBUG((stderr,"find_end_of_cont : treating unknown tag as text\n")); feed = s3; c = c3; pop_n_elems (2); continue; } pop_stack(); } if (tagname->u.string->len > sp[-1].u.string->len && c3 < s3->s->len && index_shared_string (s3->s,c3) == TAG_START (this)) { struct pike_string *cmp = string_slice (tagname->u.string, 0, sp[-1].u.string->len); if (cmp == sp[-1].u.string) { DEBUG_MARK_SPOT("find_end_of_cont : skipping open endtag prefix",s2,c2); free_string (cmp); feed = s3; c = c3; pop_stack(); continue; } free_string (cmp); } pop_stack(); if (!scan_for_end_of_tag(this,s3,c3,&s2,&c2,finished, found && endtag ? -1 : this->flags & FLAG_MATCH_TAG, &got_fin)) { DEBUG_MARK_SPOT("find_end_of_cont : wait at tag end",s2,c2); return STATE_WAIT; } if (found) { if (!endtag) { /* push a new level */ if (got_fin && this->flags & FLAG_XML_TAGS) { DEBUG_MARK_SPOT("find_end_of_cont : skipping empty element tag",s2,c2+1); feed = s2; c = c2+1; continue; } DEBUG_MARK_SPOT("find_end_of_cont : push",s2,c2+1); res=find_end_of_container(this,tagname, s2,++c2,e1,ce1,&feed,&c,finished); DEBUG_MARK_SPOT("find_end_of_cont : push end",feed,c); if (res) { DEBUG((stderr,"find_end_of_cont : " "(pushed) return %d %p:%"PRINTPTRDIFFT"d\n", res,s1,c1)); return res; } } else { if (index_shared_string (s2->s, c2) == TAG_START (this)) { DEBUG_MARK_SPOT("find_end_of_cont : skipping open endtag",s2,c2); feed = s2; c = c2; continue; } DEBUG_MARK_SPOT("find_end_of_cont : got cont end --> ",s1,c1); DEBUG_MARK_SPOT("find_end_of_cont : got endtag end --> ",s2,c2); *e1=s1; *ce1=c1; *e2=s2; *ce2=c2+1; return STATE_DONE; } } else { feed=s2; c=c2; } } } /* ---------------------------------------------------------------- */ static newstate do_try_feed(struct parser_html_storage *this, struct object *thisobj, struct feed_stack *st, struct piece **feed, int finished, int ignore_tag_cb) { p_wchar2 look_for[2 /* entity or tag */]; p_wchar2 ch; int n; struct piece *dst = *feed; ptrdiff_t cdst = st->c; newstate res; int flags = this->flags; enum contexts ctx = this->out_ctx; int scan_entity; recheck_scan(this,&scan_entity); for (;;) { switch (ctx) { case CTX_DATA: DEBUG((stderr,"%*d do_try_feed scan in data " "scan_entity=%d ignore_data=%d\n", this->stack_count,this->stack_count, scan_entity,st->ignore_data)); #ifdef PIKE_DEBUG if (*feed && feed[0]->s->len < st->c) Pike_fatal("len (%ld) < st->c (%ld)\n", TO_LONG(feed[0]->s->len), TO_LONG(st->c)); if (*feed && cmp_feed_pos (*feed, st->c, dst, cdst) > 0) Pike_fatal ("Going backwards from %p:%ld to %p:%ld.\n", (void *)(*feed), TO_LONG(st->c), (void *)dst, TO_LONG(cdst)); #endif /* do we need to check data? */ if (!st->ignore_data && *feed) { DEBUG_MARK_SPOT("do_try_feed scan for data from", *feed, st->c); /* we are to get data first */ /* look for tag or entity */ n=0; if (scan_entity) look_for[n++] = ENTITY_START (this); if (st->parse_tags) look_for[n++] = TAG_START (this); scan_forward(dst,cdst,&dst,&cdst,look_for,n); DEBUG_MARK_SPOT("do_try_feed scan for data to", dst, cdst); if (*feed != dst || st->c != cdst) { /* Found some data. */ ignore_tag_cb = 0; if (TYPEOF(this->callback__data) != T_INT) { struct piece *f; DEBUG((stderr, "put data cb feed range " "%p:%"PRINTPTRDIFFT"d - %p:%"PRINTPTRDIFFT"d\n", *feed, st->c, dst, cdst)); push_feed_range (*feed, st->c, dst, cdst); f = alloc_piece(); f->s = (--sp)->u.string; if (this->data_cb_feed) { this->data_cb_feed_end->next = f; this->data_cb_feed_end = f; } else { this->data_cb_feed = this->data_cb_feed_end = f; this->data_cb_pos = st->pos; } } else put_out_feed_range(this, *feed, st->c, dst, cdst); skip_feed_range(st,feed,&(st->c),dst,cdst); } else if (!dst->next && dst->s->len == cdst) { /* Skip a last empty piece. */ really_free_piece (*feed); *feed = NULL; } } /* at end, entity or tag */ if (!*feed || cdst == dst->s->len) { DEBUG((stderr,"%*d do_try_feed end\n", this->stack_count,this->stack_count)); return STATE_DONE; /* done */ } #ifdef PIKE_DEBUG if (*feed != dst || st->c != cdst) Pike_fatal ("Internal position confusion: feed: %p:%ld, dst: %p:%ld.\n", (void *)(*feed), TO_LONG(st->c), (void *)dst, TO_LONG(cdst)); #endif ch=index_shared_string(dst->s,cdst); if (ch == TAG_START (this)) /* tag */ { struct piece *tagend = NULL; ptrdiff_t ctagend; DEBUG((stderr,"%*d do_try_feed scan tag %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c)); #ifdef PIKE_DEBUG if (!st->parse_tags) Pike_fatal ("What am I doing parsing tags now?\n"); #endif /* skip ws to start of tag name */ if (flags & FLAG_WS_BEFORE_TAG_NAME) { if (!scan_forward(*feed,st->c+1,&dst,&cdst, WS(this), -(ptrdiff_t)N_WS(this)) && !finished) { st->ignore_data=1; return STATE_WAIT; /* come again */ } } else { FORWARD_CHAR (*feed, st->c, dst, cdst); if (cdst >= dst->s->len && !finished) return STATE_WAIT; } if (m_sizeof(this->mapqtag)) { struct piece *e1,*e2; /* <![CDATA[ ... ]]> */ ptrdiff_t ce1,ce2; /* e1 ^ ^ e2 */ struct svalue *entry; if (!quote_tag_lookup(this,dst,cdst,&e1,&ce1,finished,&entry)) { st->ignore_data=1; return STATE_WAIT; /* come again */ } if (entry) { /* quote tag */ if (scan_for_string(this,e1,ce1,&e2,&ce2,entry[2].u.string)) n_pos_forward(e2,ce2+entry[2].u.string->len,&dst,&cdst); else { if (!finished) { st->ignore_data=1; return STATE_WAIT; /* come again */ } dst = e2; cdst = ce2; } push_svalue(entry+1); if ((res=quote_tag_callback(this,thisobj,sp-1, e1,ce1,e2,ce2, st,feed,&(st->c),dst,cdst))) { DEBUG((stderr,"%*d quote tag callback return %d " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); pop_stack(); return res; } DEBUG((stderr,"%*d quote tag callback done %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c)); pop_stack(); recheck_scan(this,&scan_entity); goto done; } } /* scan tag name as argument and push */ if (!scan_forward_arg(this,dst,cdst,&dst,&cdst,SCAN_ARG_PUSH,1,finished,NULL)) { st->ignore_data=1; return STATE_WAIT; /* come again */ } if (m_sizeof(this->maptag) || m_sizeof(this->mapcont)) { int empty_tag; struct svalue *tag, *cont; struct piece *e1,*e2; /* <tag> ... </tag> */ ptrdiff_t ce1,ce2; /* e1 ^ ^ e2 */ if (!scan_for_end_of_tag(this,dst,cdst,&tagend,&ctagend,finished, flags & FLAG_MATCH_TAG, &empty_tag)) { st->ignore_data=1; pop_stack(); return STATE_WAIT; /* come again */ } if (flags & FLAG_CASE_INSENSITIVE_TAG) f_lower_case(1); tag = NULL, cont = NULL; if (flags & FLAG_XML_TAGS) { /* decide what to do from tag syntax */ if (empty_tag) { /* <foo/> */ tag=low_mapping_lookup(this->maptag,sp-1); if (!tag) cont=low_mapping_lookup(this->mapcont,sp-1); } else { /* <foo> */ cont=low_mapping_lookup(this->mapcont,sp-1); if (!cont) { tag=low_mapping_lookup(this->maptag,sp-1); if (!tag || !(flags & FLAG_STRICT_TAGS)) empty_tag = 1; } } } else { /* decide what to do from registered callbacks */ tag=low_mapping_lookup(this->maptag,sp-1); if (!tag && (cont=low_mapping_lookup(this->mapcont,sp-1))) empty_tag = 0; else empty_tag = 1; } if (empty_tag) { /* no content */ e1 = e2 = tagend; ce1 = ce2 = ctagend + 1; pop_stack(); } else { /* this is the hardest part : find the corresponding end tag */ #ifdef PIKE_DEBUG if (!tag && !cont) Pike_fatal ("You push that stone yourself!\n"); #endif if ((res=find_end_of_container(this, sp-1, tagend,ctagend+1, &e1,&ce1,&e2,&ce2, finished))) { DEBUG((stderr,"%*d find end of cont return %d " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); pop_stack(); return res; } pop_stack(); } if (tag) /* tag callback */ { /* low-level tag call */ if ((res=tag_callback(this,thisobj,tag, st,feed,&(st->c),dst=e2,cdst=ce2))) { DEBUG((stderr,"%*d tag callback return %d " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); return res; } DEBUG((stderr,"%*d tag callback done %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c)); recheck_scan(this,&scan_entity); goto done; } else if (cont) /* container callback */ { /* low-level container call */ if ((res=container_callback(this,thisobj,cont, tagend,ctagend+1,e1,ce1, st,feed,&(st->c),dst=e2,cdst=ce2))) { DEBUG((stderr,"%*d container callback return %d " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); return res; } recheck_scan(this,&scan_entity); goto done; } } else pop_stack(); dmalloc_touch_svalue(&(this->callback__tag)); if (TYPEOF(this->callback__tag) != T_INT && !ignore_tag_cb) { if (!tagend && !scan_for_end_of_tag(this,dst,cdst,&tagend,&ctagend,finished, flags & FLAG_MATCH_TAG,NULL)) { st->ignore_data=1; return STATE_WAIT; /* come again */ } if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed) { res = data_callback (this, thisobj, st); return res ? res : STATE_REREAD; } DEBUG((stderr,"%*d calling _tag callback " "%p:%"PRINTPTRDIFFT"d..%p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c+1,tagend,ctagend)); /* low-level tag call */ this->type = TYPE_TAG; do_callback(this,thisobj, &(this->callback__tag), *feed,st->c,dst=tagend,cdst=ctagend+1); if ((res=handle_result(this,st,feed,&(st->c),dst,cdst,1))) { DEBUG((stderr,"%*d do_try_feed return %d %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); return res; } recheck_scan(this,&scan_entity); } else if (flags & FLAG_IGNORE_UNKNOWN) { /* Send it to callback__data. */ dst=*feed; cdst=st->c+1; goto done; } else /* Begin parsing inside the tag for entities in arguments. */ ctx = CTX_TAG; } else /* entity */ { #ifdef PIKE_DEBUG if (ch != ENTITY_START (this)) Pike_fatal ("Oups! How did I end up here? There's no entity around.\n"); #endif goto parse_entity; /* same code as in tag arguments */ } break; case CTX_TAG: { struct piece *s1 = dst, *s2, *s3; ptrdiff_t c1 = cdst, c2, c3; int pushed = 0; if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed) { res = data_callback (this, thisobj, st); return res ? res : STATE_REREAD; } /* NOTE: This somewhat duplicates tag_args(). */ DEBUG((stderr,"%*d do_try_feed scan in tag\n", this->stack_count,this->stack_count)); /* Skip ws. */ if (!scan_forward (s1, c1, &s2, &c2, WS(this), -(ptrdiff_t)N_WS(this))) return STATE_WAIT; while (1) { if (s1 != s2 || c1 != c2) { if (this->splice_arg && pushed) { /* Check for splice_arg name. */ if (pushed > 1) { f_add (pushed); pushed = 1; } if (sp[-1].u.string == this->splice_arg) { DEBUG_MARK_SPOT ("do_try_feed arg ent scan: at empty splice arg", s1, c1); break; } else { pop_stack(); pushed = 0; } } dst = s2, cdst = c2; /* New arg name. */ } /* Scan arg name. */ DEBUG_MARK_SPOT ("do_try_feed at arg name", s2, c2); if (!scan_forward_arg (this, s2, c2, &s3, &c3, this->splice_arg ? SCAN_ARG_PUSH : SCAN_ARG_ONLY, 1, finished, NULL)) { pop_n_elems (pushed); return STATE_WAIT; } if (this->splice_arg) pushed++; /* Skip ws. */ scan_forward (s3, c3, &s1, &c1, WS(this), -(ptrdiff_t)N_WS(this)); if (c1 == s1->s->len) { pop_n_elems (pushed); return STATE_WAIT; } DEBUG_MARK_SPOT ("do_try_feed after arg name", s1, c1); ch = index_shared_string (s1->s, c1); if (ch == ARG_EQ (this)) { c1++; DEBUG_MARK_SPOT ("do_try_feed arg ent scan: before tag arg", s1, c1); ctx = CTX_TAG_ARG; break; } else if (ch == TAG_FIN (this) && this->splice_arg && s3 == s1 && c3 == c1) { DEBUG_MARK_SPOT ("do_try_feed arg ent scan: at tag fin", s1, c1); /* Got to build the arg name. '/' may be in the middle of it. */ FORWARD_CHAR (s1, c1, s1, c1); if ((flags & (FLAG_STRICT_TAGS|FLAG_XML_TAGS)) != FLAG_STRICT_TAGS) { /* But then again, maybe it isn't.. */ if (c1 == s1->s->len) { pop_n_elems (pushed); return STATE_WAIT; } ch = index_shared_string (s1->s, c1); if (ch == TAG_END (this)) { c1++; DEBUG_MARK_SPOT ("do_try_feed arg ent scan: at tag end", s1, c1); ctx = CTX_DATA; break; } } push_string (TAG_FIN_STRING (this)); pushed++; } else if (ch == TAG_END (this)) { c1++; DEBUG_MARK_SPOT ("do_try_feed arg ent scan: at tag end", s1, c1); ctx = CTX_DATA; break; } else if (s2 == s3 && c2 == c3) { /* scan_forward_arg() didn't skip -- bogus character. */ DEBUG_MARK_SPOT ("do_try_feed bogus char", s1, c1); c1++; dst = s1, cdst = c1; /* New arg name. */ pop_n_elems (pushed); pushed = 0; } else if (s3 != s1 || c3 != c1) { /* Has already skipped ws. */ s2 = s1, c2 = c1; s1 = s3, c1 = c3; continue; } /* Skip ws. */ if (!scan_forward (s1, c1, &s2, &c2, WS(this), -(ptrdiff_t)N_WS(this))) { pop_n_elems (pushed); return STATE_WAIT; } } if (pushed) { if (pushed > 1) f_add (pushed); if (sp[-1].u.string == this->splice_arg) { /* Got a splice arg. */ pop_stack(); if (ctx == CTX_TAG_ARG) { /* Got an arg value to splice. */ if (!scan_forward (s1, c1, &s1, &c1, WS(this), -(ptrdiff_t)N_WS(this)) || !scan_forward_arg (this, s1, c1, &s2, &c2, SCAN_ARG_PUSH, 0, finished, NULL)) { DEBUG((stderr,"%*d do_try_feed wait in splice arg at " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count,s1,c1)); /* Put out collected data up to the splice arg name. */ put_out_feed_range(this,*feed,st->c,dst,cdst); skip_feed_range(st,feed,&(st->c),dst,cdst); this->out_ctx = CTX_TAG_ARG; return STATE_WAIT; } DEBUG((stderr,"%*d do_try_feed got splice arg " "%p:%"PRINTPTRDIFFT"d..%p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count,s1,c1,s2,c2)); /* Put out collected data, but skip the splice arg itself. */ put_out_feed_range(this,*feed,st->c,dst,cdst); skip_feed_range(st,feed,&(st->c),s2,c2); /* Put the arg value in a nested feed and parse it in * the CTX_SPLICE_ARG context. */ add_local_feed (this, sp[-1].u.string); this->out_ctx = CTX_SPLICE_ARG; return STATE_REREAD; } else { /* Just a splice arg without value. Ignore it. */ put_out_feed_range(this,*feed,st->c,dst,cdst); if (ctx == CTX_DATA) put_out_feed_range(this,s3,c3,s1,c1); /* Put trailing tag end. */ skip_feed_range(st,feed,&(st->c),dst=s1,cdst=c1); this->out_ctx = ctx; break; } } else pop_stack(); } put_out_feed_range(this,*feed,st->c,dst=s1,cdst=c1); skip_feed_range(st,feed,&(st->c),dst,cdst); this->out_ctx = ctx; break; } case CTX_SPLICE_ARG: #ifdef PIKE_DEBUG if (this->data_cb_feed) Pike_fatal ("Shouldn't have data cb feed in splice arg context.\n"); #endif if (!*feed) { DEBUG((stderr,"%*d do_try_feed end in splice tag\n", this->stack_count,this->stack_count)); this->out_ctx = CTX_TAG; return STATE_DONE; } if (!scan_entity) { /* Just put out everything. */ DEBUG((stderr,"%*d do_try_feed put out whole splice tag\n", this->stack_count,this->stack_count)); while (dst->next) dst = dst->next; put_out_feed_range(this,*feed,st->c,dst,cdst=dst->s->len); skip_feed_range(st,feed,&(st->c),dst,cdst); this->out_ctx = CTX_TAG; return STATE_DONE; } /* Search for entities. Let anything through otherwise. */ DEBUG((stderr,"%*d do_try_feed entity scan in splice tag\n", this->stack_count,this->stack_count)); res = scan_forward (dst, cdst, &dst, &cdst, &ENTITY_START (this), 1); put_out_feed_range(this,*feed,st->c,dst,cdst); skip_feed_range(st,feed,&(st->c),dst,cdst); if (!res) { this->out_ctx = CTX_TAG; return STATE_DONE; } goto parse_entity; default: { int quote; #ifdef PIKE_DEBUG if (this->data_cb_feed) Pike_fatal ("Shouldn't have data cb feed in tag arg context.\n"); #endif if (!*feed) { DEBUG((stderr,"%*d do_try_feed end in tag arg\n", this->stack_count,this->stack_count)); this->out_ctx = ctx; return STATE_DONE; } DEBUG((stderr,"%*d do_try_feed scan in tag arg\n", this->stack_count,this->stack_count)); /* Skip ws. */ if (!scan_forward (dst, cdst, &dst, &cdst, WS(this), -(ptrdiff_t)N_WS(this))) return STATE_WAIT; continue_in_arg: quote = ctx - CTX_TAG_QUOTED_ARG; DEBUG_MARK_SPOT ("do_try_feed at arg val", dst, cdst); if (!(res = scan_forward_arg (this, dst, cdst, &dst, &cdst, scan_entity ? SCAN_ARG_ENT_BREAK : SCAN_ARG_ONLY, 0, finished, &quote))) return STATE_WAIT; if (res == 1) { /* arg end */ ctx = CTX_TAG; break; } /* entity in tag argument */ DEBUG_MARK_SPOT ("do_try_feed arg ent scan: at entity start", dst, cdst); put_out_feed_range(this,*feed,st->c,dst,cdst); skip_feed_range(st,feed,&(st->c),dst,cdst); ctx = this->out_ctx = CTX_TAG_QUOTED_ARG + quote; } /* FALL THROUGH */ parse_entity: { p_wchar2 end_found; DEBUG((stderr,"%*d do_try_feed scan entity %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c)); #ifdef PIKE_DEBUG if (!scan_entity) Pike_fatal ("Shouldn't parse entities now.\n"); if (*feed != dst || st->c != cdst) Pike_fatal ("Internal position confusion: feed: %p:%ld, dst: %p:%ld\n", (void *)(*feed), TO_LONG(st->c), (void *)dst, TO_LONG(cdst)); #endif /* just search for end of entity */ if (flags & FLAG_LAZY_ENTITY_END) end_found = scan_forward(dst,cdst+1,&dst,&cdst, LAZY_ENTITY_ENDS (this), N_LAZY_ENTITY_ENDS (this)) ? index_shared_string(dst->s,cdst) : 0; else if (flags & FLAG_NESTLING_ENTITY_END) { p_wchar2 look_for[2]; int level=1; look_for[0] = ENTITY_START (this); look_for[1] = ENTITY_END (this); for (;;) { if (!scan_forward(dst,cdst+1,&dst,&cdst,look_for,2)) { end_found=0; break; } if (index_shared_string(dst->s,cdst) == ENTITY_END (this)) { if (!--level) { end_found = ENTITY_END (this); break; } } else level++; } } else end_found = scan_forward(dst,cdst+1,&dst,&cdst,&ENTITY_END(this),1) ? ENTITY_END (this) : 0; if (end_found != ENTITY_END (this)) { if (finished) { /* got no entity end */ cdst=st->c+1; goto done; } else { st->ignore_data=1; /* no data first at next call */ return STATE_WAIT; /* no end, call again */ } } if (m_sizeof(this->mapentity)) { struct svalue *v; push_feed_range(*feed,st->c+1,dst,cdst); cdst++; v=low_mapping_lookup(this->mapentity,sp-1); pop_stack(); if (v) /* entity we want, do a callback */ { /* low-level entity call */ this->type = TYPE_ENTITY; if ((res=entity_callback(this,thisobj,v, st,feed,&(st->c),dst,cdst))) { DEBUG((stderr,"%*d entity callback return %d " "%p:%"PRINTPTRDIFFT"d\n", this->stack_count, this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); return res; } DEBUG((stderr,"%*d entity callback done %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c)); recheck_scan(this,&scan_entity); switch (ctx) { case CTX_DATA: case CTX_SPLICE_ARG: goto done; default: if (*feed) goto continue_in_arg; /* Shouldn't skip ws here. */ goto done; } } } else cdst++; dmalloc_touch_svalue(&(this->callback__entity)); if (TYPEOF(this->callback__entity) != T_INT && !ignore_tag_cb) { if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed) { res = data_callback (this, thisobj, st); return res ? res : STATE_REREAD; } DEBUG((stderr,"%*d calling _entity callback " "%p:%"PRINTPTRDIFFT"d..%p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, *feed,st->c,dst,cdst)); /* low-level entity call */ this->type = TYPE_ENTITY; do_callback(this,thisobj, &(this->callback__entity), *feed,st->c,dst,cdst); if ((res=handle_result(this,st,feed,&(st->c),dst,cdst,1))) { DEBUG((stderr,"%*d do_try_feed return %d %p:%"PRINTPTRDIFFT"d\n", this->stack_count,this->stack_count, res,*feed,st->c)); st->ignore_data=(res==STATE_WAIT); return res; } recheck_scan(this,&scan_entity); switch (ctx) { case CTX_DATA: case CTX_SPLICE_ARG: goto done; default: if (*feed) goto continue_in_arg; /* Shouldn't skip ws here. */ goto done; } } else if (flags & FLAG_IGNORE_UNKNOWN) { dst=*feed; cdst=st->c+1; } else if (*feed) { if (TYPEOF(this->callback__data) != T_INT && this->data_cb_feed && (res = data_callback (this, thisobj, st))) return res; put_out_feed_range(this,*feed,st->c,dst,cdst); skip_feed_range(st,feed,&(st->c),dst,cdst); } } } done: st->ignore_data=0; ignore_tag_cb=0; } } /****** try_feed - internal main ********************/ static void try_feed(int finished) { /* o if tag_stack: o pop & parse that o ev put on stack */ struct feed_stack *st; int ignore_tag_cb = 0; if (THIS->start) return; /* called from a callback - avoid recursion */ for (;;) { newstate res; struct piece **feed; st=THIS->stack; feed = &st->local_feed; if (*feed) res = do_try_feed(THIS,THISOBJ, st, feed, finished||(st->prev!=NULL), ignore_tag_cb); else res = STATE_WAIT; /* Got no data. Try waiting. */ ignore_tag_cb = 0; switch (res) { case STATE_WAIT: /* incomplete, call again */ st = THIS->stack; if (!finished && st->prev == NULL) return; /* finished anyway, just output last bit */ feed = &st->local_feed; if (*feed) { struct piece *end; DEBUG((stderr, "%*d try_feed finishing from STATE_WAIT\n", THIS->stack_count, THIS->stack_count)); for (end = *feed; end->next; end = end->next) {} if (*feed != end || st->c != end->s->len) { /* This is an incomplete tag or entity and not data. * Hence it's output directly regardless of the data cb. */ put_out_feed_range (THIS, *feed, st->c, end, end->s->len); skip_feed_range (st, feed, &(st->c), end, end->s->len); } } /* FALL THROUGH */ case STATE_DONE: /* done, pop stack */ if (!THIS->top.local_feed) THIS->feed_end=NULL; st=THIS->stack->prev; if (!st) { if (TYPEOF(THIS->callback__data) != T_INT && THIS->data_cb_feed && (res = data_callback (THIS, THISOBJ, st))) goto state_reread; if (finished) reset_stack_head (THIS); return; /* all done, but keep last stack elem */ } #ifdef PIKE_DEBUG if (THIS->stack->local_feed) Pike_fatal("internal weirdness in Parser.HTML: feed left\n"); #endif really_free_feed_stack (THIS->stack); THIS->stack=st; THIS->stack_count--; break; case STATE_REPARSE: /* user requested another go at the current data */ if (st == THIS->stack) ignore_tag_cb = 1; /* FALL THROUGH */ state_reread: case STATE_REREAD: /* reread stack head */ if (THIS->stack_count>THIS->max_stack_depth) Pike_error("Parser.HTML: too deep recursion\n"); break; } } UNREACHABLE(); } /****** feed ****************************************/ static void low_feed(struct pike_string *ps) { struct piece *f; if (!ps->len) return; f = alloc_piece(); copy_shared_string(f->s,ps); if (THIS->feed_end==NULL) { #ifdef HTML_DEBUG if (THIS->flags & FLAG_DEBUG_MODE) { fprintf (stderr, "Initial search chars:\n"); debug_print_search_chars (THIS); } #endif DEBUG_MARK_SPOT("new feed", f, 0); THIS->top.local_feed=THIS->feed_end=f; } else { DEBUG_MARK_SPOT("attached to feed end", f, 0); THIS->feed_end->next=f; THIS->feed_end=f; } } /*! @decl Parser.HTML feed() *! @decl Parser.HTML feed(string s, void|int do_parse) *! *! Feed new data to the @[Parser.HTML] object. This will start a scan *! and may result in callbacks. Note that it's possible that all data *! fed isn't processed - to do that, call @[finish()]. *! *! If the function is called without arguments, no data is fed, but *! the parser is run. If the string argument is followed by a *! @expr{0@}, @expr{->feed(s,0);@}, the string is fed, but the parser *! isn't run. *! *! @returns *! Returns the object being called. *! *! @seealso *! @[finish], @[read], @[feed_insert] */ static void html_feed(INT32 args) { DEBUG((stderr,"feed %"PRINTPTRDIFFT"d chars\n", (args && TYPEOF(sp[-args]) == T_STRING)? sp[-args].u.string->len:-1)); if (args) { if (TYPEOF(sp[-args]) == T_STRING) low_feed(sp[-args].u.string); else if (TYPEOF(sp[-args]) != T_INT || sp[-args].u.integer) SIMPLE_BAD_ARG_ERROR("feed",1,"string"); } if (args<2 || TYPEOF(sp[1-args]) != T_INT || sp[1-args].u.integer) { pop_n_elems(args); try_feed(0); } else pop_n_elems(args); ref_push_object(THISOBJ); } /*! @decl Parser.HTML feed_insert(string s) *! This pushes a string on the parser stack. *! *! @returns *! Returns the object being called. *! *! @note *! Don't use! */ static void html_feed_insert(INT32 args) { if (!args) SIMPLE_TOO_FEW_ARGS_ERROR("feed_insert",1); if (TYPEOF(sp[-args]) != T_STRING) SIMPLE_BAD_ARG_ERROR("feed_insert",1,"string"); DEBUG((stderr,"html_feed_insert: " "pushing string (len=%"PRINTPTRDIFFT"d) on feedstack\n", sp[-args].u.string->len)); add_local_feed (THIS, sp[-args].u.string); if (args<2 || TYPEOF(sp[1-args]) != T_INT || sp[1-args].u.integer) { pop_n_elems(args); try_feed(0); } else pop_n_elems(args); ref_push_object(THISOBJ); } /*! @decl Parser.HTML finish() *! @decl Parser.HTML finish(string s) *! Finish a parser pass. A string may be sent here, similar to *! feed(). *! *! @returns *! Returns the object being called. */ static void html_finish(INT32 args) { if (args) { if (TYPEOF(sp[-args]) == T_STRING) low_feed(sp[-args].u.string); else if (TYPEOF(sp[-args]) != T_INT || sp[-args].u.integer) SIMPLE_BAD_ARG_ERROR("finish",1,"string"); } try_feed(1); ref_push_object(THISOBJ); } /*! @decl string|array(mixed) read() *! @decl string|array(mixed) read(int max_elems) *! Read parsed data from the parser object. *! *! @returns *! Returns a string of parsed data if the parser isn't in *! @[mixed_mode], an array of arbitrary data otherwise. */ static void html_read(INT32 args) { ptrdiff_t n = THIS->out_length; if (args) { if (TYPEOF(sp[-args]) == T_INT && sp[-args].u.integer >= 0) n = MINIMUM (sp[-args].u.integer, n); else SIMPLE_BAD_ARG_ERROR ("read", 1, "nonnegative integer"); } pop_n_elems(args); if (THIS->out_max_shift < 0) { /* collect up to n items */ struct array *res; ptrdiff_t i; int type_field = 0; res = allocate_array (n); for (i = 0; i < n; i++) { struct out_piece *z = THIS->out; type_field |= 1 << TYPEOF(z->v); move_svalue (&ITEM(res)[i], &z->v); mark_free_svalue (&z->v); THIS->out = z->next; really_free_out_piece (z); } res->type_field = type_field; push_array (res); THIS->out_length -= n; #ifdef PIKE_DEBUG if (!THIS->out_length != !THIS->out) Pike_fatal ("Inconsistency in output queue length.\n"); #endif } else { /* collect up to n characters */ if (!THIS->out || THIS->out->v.u.string->len < n) { struct string_builder buf; ptrdiff_t l = 0; init_string_builder_alloc (&buf, n, THIS->out_max_shift); while (l < n) { struct out_piece *z = THIS->out; #ifdef PIKE_DEBUG if (TYPEOF(z->v) != T_STRING) Pike_fatal ("Got nonstring in parsed data\n"); #endif if (z->v.u.string->len>n) { struct pike_string *ps; string_builder_append (&buf, MKPCHARP_STR (z->v.u.string), n); ps=string_slice(z->v.u.string,n,z->v.u.string->len-n); free_string(z->v.u.string); z->v.u.string=ps; break; } l+=z->v.u.string->len; string_builder_shared_strcat (&buf, z->v.u.string); THIS->out=z->next; really_free_out_piece (z); } push_string (finish_string_builder (&buf)); } else /* Optimize the cases when there are no output pieces to concatenate. */ if (THIS->out->v.u.string->len == n) { struct out_piece *z = THIS->out; push_string (z->v.u.string); mark_free_svalue (&z->v); THIS->out = z->next; really_free_out_piece (z); } else { /* THIS->out->v.u.string->len > n */ struct pike_string *ps; push_string(string_slice(THIS->out->v.u.string,0,n)); ps=string_slice(THIS->out->v.u.string,n,THIS->out->v.u.string->len-n); free_string(THIS->out->v.u.string); THIS->out->v.u.string=ps; } THIS->out_length -= n; if (!THIS->out_length) THIS->out_max_shift = 0; #ifdef PIKE_DEBUG if (!THIS->out_length) { struct out_piece *z; for (z = THIS->out; z; z = z->next) if (TYPEOF(z->v) != T_STRING || z->v.u.string->len) Pike_fatal ("Inconsistency in output queue.\n"); } else if (!THIS->out) Pike_fatal ("Inconsistency in output queue length.\n"); #endif } } /*! @decl Parser.HTML write_out(mixed ... args) *! Send data to the output stream, i.e. it won't be parsed and it *! won't be sent to the data callback, if any. *! *! Any data is allowed when the parser is running in @[mixed_mode]. *! Only strings are allowed otherwise. *! *! @returns *! Returns the object being called. */ static void html_write_out(INT32 args) { int i; for (i = args; i; i--) { if (THIS->out_max_shift >= 0 && TYPEOF(sp[-i]) != T_STRING) Pike_error("write_out: not a string argument\n"); put_out_feed(THIS,sp-i); } pop_n_elems(args); ref_push_object(THISOBJ); } /** query *******************************************/ /*! @decl array(int) at() *! @decl int at_line() *! @decl int at_char() *! @decl int at_column() *! *! Returns the current position. Characters and columns count from *! @expr{0@}, lines count from @expr{1@}. *! *! @[at()] gives an array with the following layout. *! @array *! @elem int 0 *! Line. *! @elem int 1 *! Character. *! @elem int 2 *! Column. *! @endarray */ static void html_at_line(INT32 args) { pop_n_elems(args); push_int(THIS->top.pos.lineno); } static void html_at_char(INT32 args) { pop_n_elems(args); push_int(THIS->top.pos.byteno); } static void html_at_column(INT32 args) { pop_n_elems(args); push_int(THIS->top.pos.byteno-THIS->top.pos.linestart); } static void html_at(INT32 args) { pop_n_elems(args); push_int(THIS->top.pos.lineno); push_int(THIS->top.pos.byteno); push_int(THIS->top.pos.byteno-THIS->top.pos.linestart); f_aggregate(3); } /*! @decl string current() *! *! Gives the current range of data, ie the whole tag/entity/etc being *! parsed in the current callback. Returns zero if there's no current *! range, i.e. when the function is not called in a callback. */ static void html_current(INT32 args) { pop_n_elems(args); if (THIS->start) { push_feed_range(THIS->start,THIS->cstart,THIS->end,THIS->cend); } else push_int(0); } /*! @decl string tag_name() *! *! Gives the name of the current tag, or zero. If used from an entity *! callback, it gives the string inside the entity. *! */ /*! @decl mapping(string:mixed) tag_args(void|mixed default_value) *! *! Gives the arguments of the current tag, parsed to a convenient *! mapping consisting of key:value pairs. If the current thing isn't *! a tag, it gives zero. @[default_value] is used for arguments which *! have no value in the tag. If @[default_value] isn't given, the *! value is set to the same string as the key. */ /*! @decl string tag_content() *! *! Gives the content of the current tag, if it's a container or quote *! tag. Otherwise returns zero. */ /*! @decl array tag(void|mixed default_value) *! *! Returns the equivalent of the following calls. *! @array *! @elem string 0 *! @expr{tag_name()@} *! @elem mapping(string:mixed) 1 *! @expr{tag_args(default_value)@} *! @elem string 2 *! @expr{tag_content()@} *! @endarray */ static void tag_name(struct parser_html_storage *this,struct piece *feed, ptrdiff_t c, int skip_tag_start) { struct piece *s1=NULL,*s2=NULL; ptrdiff_t c1=0,c2=0; int pushed = 0; if (skip_tag_start) { p_wchar2 ch=index_shared_string(feed->s,c); if (c < feed->s->len && ch == TAG_START (this)) FORWARD_CHAR(feed,c,feed,c); } if (c < feed->s->len && index_shared_string (feed->s, c) == TAG_FIN (this)) { c++; push_string (TAG_FIN_STRING (this)); pushed = 1; } /* scan ws to start of tag name */ if (this->flags & FLAG_WS_BEFORE_TAG_NAME) scan_forward(feed,c,&s1,&c1, WS(this), -(ptrdiff_t)N_WS(this)); else s1 = feed, c1 = c; /* scan as argument and push*/ scan_forward_arg(this,s1,c1,&s2,&c2,SCAN_ARG_PUSH,1,1,NULL); if (pushed) f_add (2); } static INLINE void tag_push_default_arg(struct svalue *def) { if (def) push_svalue(def); else stack_dup(); } static void tag_args(struct parser_html_storage *this,struct piece *feed,ptrdiff_t c, struct svalue *def, int skip_name, int to_tag_end) { struct piece *s1=NULL,*s2=NULL,*s3; int flags = this->flags; ptrdiff_t c1=0,c2=0,c3; int n=0; #ifdef PIKE_DEBUG struct piece *prev_s = NULL; ptrdiff_t prev_c = 0; #endif /* NOTE: This somewhat duplicates the CTX_TAG clause in * do_try_feed(). */ p_wchar2 ch=index_shared_string(feed->s,c); if (ch == TAG_START (this)) c++; if (skip_name) { /* scan past tag name */ if (flags & FLAG_WS_BEFORE_TAG_NAME) scan_forward(feed,c,&s1,&c1, WS(this), -(ptrdiff_t)N_WS(this)); else s1 = feed, c1 = c; scan_forward_arg(this,s1,c1,&s2,&c2,SCAN_ARG_ONLY,1,1,NULL); } else s2 = feed, c2 = c; for (;;) { /* skip whitespace */ scan_forward(s2,c2,&s1,&c1,WS(this), -(ptrdiff_t)N_WS(this)); new_arg: #ifdef PIKE_DEBUG if (prev_s && cmp_feed_pos (prev_s, prev_c, s1, c1) >= 0) Pike_fatal ("Not going forward in tag args loop (from %p:%ld to %p:%ld).\n", (void *)prev_s, PTRDIFF_T_TO_LONG(prev_c), (void *)s1, PTRDIFF_T_TO_LONG(c1)); prev_s = s1, prev_c = c1; #endif DEBUG_MARK_SPOT("html_tag_args arg start",s1,c1); /* end of tag? */ if (c1==s1->s->len) { /* end<tm> */ DEBUG_MARK_SPOT("html_tag_args hard tag end (1)",s1,c1); break; } ch=index_shared_string(s1->s,c1); if ((flags & (FLAG_STRICT_TAGS|FLAG_XML_TAGS)) != FLAG_STRICT_TAGS && ch == TAG_FIN (this)) { FORWARD_CHAR(s1, c1, s3, c3); if ((c3==s3->s->len || index_shared_string(s3->s,c3) == TAG_END (this)) && to_tag_end) { DEBUG_MARK_SPOT("html_tag_args empty element tag end",s3,c3); break; } else if (n && s1==s2 && c1==c2) { /* previous arg value didn't really end */ DEBUG_MARK_SPOT("html_tag_args arg val continues",s3,c3); push_string (TAG_FIN_STRING (this)); scan_forward_arg (this,s3,c3,&s2,&c2,SCAN_ARG_PUSH,0,1,NULL); f_add (3); continue; } } else if (ch == TAG_END (this) && to_tag_end) { /* end */ DEBUG_MARK_SPOT("html_tag_args soft tag end (1)",s1,c1); break; } /* scan this argument name and push*/ scan_forward_arg(this,s1,c1,&s2,&c2,SCAN_ARG_PUSH,1,1,NULL); if (flags & FLAG_CASE_INSENSITIVE_TAG) f_lower_case(1); n++; if (!(n & 127)) custom_check_stack(256, "Out of stack after parsing %d tag arguments.\n", n); do { /* scan for '=', '>' or next argument */ /* skip whitespace */ scan_forward(s2,c2,&s3,&c3,WS(this), -(ptrdiff_t)N_WS(this)); if (c3==s3->s->len) /* end<tm> */ { DEBUG_MARK_SPOT("html_tag_args hard tag end (2)",s3,c3); tag_push_default_arg(def); goto done; } ch=index_shared_string(s3->s,c3); if (ch == TAG_FIN (this) && s2==s3 && c2==c3) { struct piece *s4; ptrdiff_t c4; /* a '/' that might have been part of the argument name */ FORWARD_CHAR (s3, c3, s4, c4); ch = index_shared_string (s4->s,c4); if (ch == TAG_END (this) && to_tag_end) break; DEBUG_MARK_SPOT("html_tag_args arg name continues",s4,c4); push_string (TAG_FIN_STRING (this)); scan_forward_arg (this,s4,c4,&s2,&c2,SCAN_ARG_PUSH,1,1,NULL); if (flags & FLAG_CASE_INSENSITIVE_TAG) f_lower_case(1); f_add (3); } else break; } while (1); if (ch == TAG_END (this) && to_tag_end) /* end */ { DEBUG_MARK_SPOT("html_tag_args soft tag end (2)",s3,c3); tag_push_default_arg(def); break; } if (ch != ARG_EQ (this)) { if (c1!=c3 || s1!=s3) /* end of _this_ argument */ { DEBUG_MARK_SPOT("html_tag_args empty arg end",s3,c3); s1 = s3, c1 = c3; tag_push_default_arg(def); goto new_arg; } else { /* a stray bogus character */ DEBUG_MARK_SPOT("html_tag_args bogus char",s3,c3); s2 = s3, c2 = c3 + 1; pop_stack(); n--; continue; } } /* left: case of '=' */ c3++; /* skip it */ /* skip whitespace */ scan_forward(s3,c3,&s2,&c2,WS(this), -(ptrdiff_t)N_WS(this)); DEBUG_MARK_SPOT("html_tag_args value start",s2,c2); /* scan the argument value */ scan_forward_arg(this,s2,c2,&s1,&c1,SCAN_ARG_PUSH,0,1,NULL); DEBUG_MARK_SPOT("html_tag_args value end",s1,c1); /* next argument in the loop */ s2 = s1; c2 = c1; } done: f_aggregate_mapping(n*2); } static void html_tag_name(INT32 args) { /* get rid of arguments */ pop_n_elems(args); if (!THIS->start) Pike_error ("Parser.HTML: There's no current range.\n"); switch (THIS->type) { case TYPE_TAG: case TYPE_CONT: tag_name(THIS,THIS->start,THIS->cstart,1); break; case TYPE_ENTITY: if (THIS->cend == 0) { push_feed_range(THIS->start,THIS->cstart+1,THIS->end,THIS->cend); if (sp[-1].u.string->len && index_shared_string(sp[-1].u.string,sp[-1].u.string->len-1) == ENTITY_END (THIS)) { struct pike_string *s=string_slice(sp[-1].u.string,0,sp[-1].u.string->len-1); pop_stack(); push_string(s); } } else { ptrdiff_t end = THIS->cend; if (index_shared_string(THIS->end->s,end-1) == ENTITY_END (THIS)) end--; push_feed_range(THIS->start,THIS->cstart+1,THIS->end,end); } break; case TYPE_QTAG: { struct svalue *v; struct piece *beg; ptrdiff_t cbeg; if (THIS->flags & FLAG_WS_BEFORE_TAG_NAME) scan_forward (THIS->start, THIS->cstart+1, &beg, &cbeg, WS(THIS), -(ptrdiff_t)N_WS(THIS)); else beg = THIS->start, cbeg = THIS->cstart + 1; quote_tag_lookup (THIS, beg, cbeg, &beg, &cbeg, 1, &v); if (!v) push_int (0); else push_svalue (v); break; } default: push_int(0); } } static void html_tag_args(INT32 args) { struct svalue def; check_all_args("tag_args",args,BIT_MIXED|BIT_VOID,0); if (args) assign_svalue_no_free(&def,sp-args); pop_n_elems(args); if (!THIS->start) Pike_error ("Parser.HTML: There's no current range.\n"); switch (THIS->type) { case TYPE_TAG: case TYPE_CONT: if (args) { tag_args(THIS,THIS->start,THIS->cstart,&def,1,1); free_svalue(&def); } else tag_args(THIS,THIS->start,THIS->cstart,NULL,1,1); break; default: push_int(0); } } static void html_tag_content(INT32 args) { struct piece *beg = THIS->start; ptrdiff_t cbeg = THIS->cstart+1; pop_n_elems(args); if (!THIS->start) Pike_error ("Parser.HTML: There's no current range.\n"); if (THIS->flags & FLAG_WS_BEFORE_TAG_NAME && !scan_forward (beg, cbeg, &beg, &cbeg, WS(THIS), -(ptrdiff_t)N_WS(THIS))) { push_int(0); return; } switch (THIS->type) { case TYPE_CONT: { struct piece *end, *dummy; ptrdiff_t cend, cdummy; if (scan_forward_arg (THIS, beg, cbeg, &beg, &cbeg, SCAN_ARG_PUSH, 1, 1, NULL)) { if (scan_for_end_of_tag (THIS, beg, cbeg, &beg, &cbeg, 1, THIS->flags & FLAG_MATCH_TAG, NULL) && !find_end_of_container (THIS, sp-1, beg, cbeg+1, &end, &cend, &dummy, &cdummy, 1)) { pop_stack(); if (cmp_feed_pos (end, cend, THIS->end, THIS->cend) < 0) push_feed_range (beg, cbeg+1, end, cend); else push_int(0); } else { pop_stack(); push_int(0); } } else push_int(0); break; } case TYPE_QTAG: { struct svalue *v; struct piece *end; ptrdiff_t cend; if (quote_tag_lookup (THIS, beg, cbeg, &beg, &cbeg, 1, &v) && scan_for_string (THIS, beg, cbeg, &end, &cend, v[2].u.string)) push_feed_range (beg, cbeg, end, cend); else push_int(0); break; } default: push_int(0); } } static void html_tag(INT32 args) { check_all_args("tag",args,BIT_MIXED|BIT_VOID,0); html_tag_args(args); html_tag_name(0); stack_swap(); html_tag_content(0); f_aggregate(3); } /*! @decl string context() *! Returns the current output context as a string. *! *! @string *! @value "data" *! In top level data. This is always returned when called from *! tag or container callbacks. *! @value "arg" *! In an unquoted argument. *! @value "splice_arg" *! In a splice argument. *! @endstring *! *! The return value can also be a single character string, in which *! case the context is a quoted argument. The string contains the *! starting quote character. *! *! This function is typically only useful in entity callbacks, which *! can be called both from text and argument values of different *! sorts. *! *! @seealso *! @[splice_arg] */ static void html_context(INT32 args) { pop_n_elems (args); switch (THIS->out_ctx) { case CTX_DATA: push_constant_text ("data"); break; case CTX_TAG: push_constant_text ("tag"); break; /* should never happen */ case CTX_SPLICE_ARG: push_constant_text ("splice_arg"); break; case CTX_TAG_ARG: push_constant_text ("arg"); break; default: push_string (make_shared_binary_string2 ( ARGQ_START (THIS) + (THIS->out_ctx - CTX_TAG_QUOTED_ARG), 1)); } } /*! @decl string parse_tag_name(string tag) *! *! Parses the tag name from a tag string without the surrounding *! brackets, i.e. a string on the form @expr{"tagname some='tag' *! args"@}. *! @returns *! Returns the tag name or an empty string if none. */ static void html_parse_tag_name(INT32 args) { struct piece feed; check_all_args("parse_tag_name",args,BIT_STRING,0); feed.s=sp[-args].u.string; feed.next=NULL; tag_name(THIS,&feed,0,0); stack_pop_n_elems_keep_top(args); } /*! @decl mapping parse_tag_args(string tag) *! *! Parses the tag arguments from a tag string without the name and *! surrounding brackets, i.e. a string on the form @expr{"some='tag' *! args"@}. *! *! @returns *! Returns a mapping containing the tag arguments. *! *! @seealso *! @[tag_args] */ static void html_parse_tag_args(INT32 args) { struct piece feed; check_all_args("parse_tag_args",args,BIT_STRING,0); feed.s=sp[-args].u.string; feed.next=NULL; tag_args(THIS,&feed,0,NULL,0,0); stack_pop_n_elems_keep_top(args); } /** debug *******************************************/ /*! @decl mapping _inspect() *! *! This is a low-level way of debugging a parser. This gives a *! mapping of the internal state of the Parser.HTML object. *! *! The format and contents of this mapping may change without further *! notice. */ static void html__inspect(INT32 args) { int n=0,m,o,p; struct piece *f; struct out_piece *of; struct feed_stack *st; pop_n_elems(args); push_static_text("feed"); m=0; st=THIS->stack; while (st) { o=0; p=0; push_static_text("feed"); f=st->local_feed; while (f) { ref_push_string(f->s); p++; f=f->next; } f_aggregate(p); o++; push_static_text("position"); push_int(DO_NOT_WARN(st->c)); o++; push_static_text("byteno"); push_int(st->pos.byteno); o++; push_static_text("lineno"); push_int(st->pos.lineno); o++; push_static_text("linestart"); push_int(st->pos.linestart); o++; f_aggregate_mapping(o*2); st=st->prev; m++; } f_aggregate(m); n++; push_static_text("data_cb_feed"); for (f = THIS->data_cb_feed, p = 0; f; f = f->next) { ref_push_string (f->s); p++; } f_aggregate(p); n++; push_static_text("outfeed"); p=0; of=THIS->out; while (of) { push_svalue(&of->v); p++; of=of->next; } f_aggregate(p); n++; push_static_text("tags"); ref_push_mapping(THIS->maptag); n++; push_static_text("containers"); ref_push_mapping(THIS->mapcont); n++; push_static_text("entities"); ref_push_mapping(THIS->mapentity); n++; push_static_text("quote_tags"); ref_push_mapping(THIS->mapqtag); n++; push_static_text("splice_arg"); if (THIS->splice_arg) ref_push_string(THIS->splice_arg); else push_int(0); n++; push_static_text("callback__tag"); push_svalue(&(THIS->callback__tag)); n++; push_static_text("callback__entity"); push_svalue(&(THIS->callback__entity)); n++; push_static_text("callback__data"); push_svalue(&(THIS->callback__data)); n++; push_static_text("flags"); push_int(THIS->flags); n++; f_aggregate_mapping(n*2); } /** create, clone ***********************************/ static void html_create(INT32 args) { pop_n_elems(args); } /*! @decl Parser.HTML clone(mixed ... args) *! *! Clones the @[Parser.HTML] object. A new object of the same class *! is created, filled with the parse setup from the old object. *! *! This is the simpliest way of flushing a parse feed/output. *! *! The arguments to clone is sent to the new object, simplifying work *! for custom classes that inherits @[Parser.HTML]. *! *! @returns *! Returns the new object. *! *! @note *! create is called _before_ the setup is copied. */ static void html_clone(INT32 args) { struct object *o; struct parser_html_storage *p; DEBUG((stderr,"parse_html_clone object %p\n",THISOBJ)); push_object(o=clone_object_from_object(THISOBJ,args)); p=get_storage(o,parser_html_program); if (p->maptag) free_mapping(p->maptag); add_ref(p->maptag=THIS->maptag); if (p->mapcont) free_mapping(p->mapcont); add_ref(p->mapcont=THIS->mapcont); if (p->mapentity) free_mapping(p->mapentity); add_ref(p->mapentity=THIS->mapentity); if (p->mapqtag) free_mapping(p->mapqtag); add_ref(p->mapqtag=THIS->mapqtag); if (p->splice_arg) free_string(p->splice_arg); if (THIS->splice_arg) add_ref(p->splice_arg=THIS->splice_arg); else p->splice_arg=NULL; dmalloc_touch_svalue(&p->callback__tag); dmalloc_touch_svalue(&p->callback__data); dmalloc_touch_svalue(&p->callback__entity); dmalloc_touch_svalue(&THIS->callback__tag); dmalloc_touch_svalue(&THIS->callback__data); dmalloc_touch_svalue(&THIS->callback__entity); assign_svalue(&p->callback__tag,&THIS->callback__tag); assign_svalue(&p->callback__data,&THIS->callback__data); assign_svalue(&p->callback__entity,&THIS->callback__entity); if (p->extra_args) free_array(p->extra_args); if (THIS->extra_args) add_ref(p->extra_args=THIS->extra_args); else p->extra_args=NULL; p->flags=THIS->flags; if(THIS->out_max_shift==-1) p->out_max_shift=THIS->out_max_shift; p->max_stack_depth=THIS->max_stack_depth; p->top.parse_tags = THIS->flags & FLAG_PARSE_TAGS; #ifdef CONFIGURABLE_MARKUP p->tag_start=THIS->tag_start; p->tag_end=THIS->tag_end; p->entity_start=THIS->entity_start; p->entity_end=THIS->entity_end; p->arg_eq=THIS->arg_eq; p->nargq=THIS->nargq; for (i=0; i<p->nargq; i++) { p->argq_start[i]=THIS->argq_start[i]; p->argq_stop[i]=THIS->argq_stop[i]; } p->n_lazy_entity_ends=THIS->n_lazy_entity_ends; newstr=(p_wchar2*)xalloc(sizeof(p_wchar2)*p->n_lazy_entity_ends); memcpy(newstr,THIS->lazy_entity_ends,sizeof(p_wchar2)*p->n_lazy_entity_ends); if (p->lazy_entity_ends) free(p->lazy_entity_ends); p->lazy_entity_ends=newstr; p->n_ws=THIS->n_ws; newstr=(p_wchar2*)xalloc(sizeof(p_wchar2)*p->n_ws); memcpy(newstr,THIS->ws,sizeof(p_wchar2)*p->n_ws); if (p->ws) free(p->ws); p->ws=newstr; #endif DEBUG((stderr,"done clone\n")); /* all copied, object on stack */ } /****** setup ***************************************/ /*! @decl Parser.HTML set_extra(mixed ...args) *! *! Sets the extra arguments passed to all tag, container and entity *! callbacks. *! *! @returns *! Returns the object being called. */ static void html_set_extra(INT32 args) { if (THIS->extra_args) { free_array(THIS->extra_args); THIS->extra_args=NULL; } if (args) { f_aggregate(args); THIS->extra_args=sp[-1].u.array; sp--; } dmalloc_touch_svalue(sp); ref_push_object(THISOBJ); } /*! @decl array get_extra() *! Gets the extra arguments set by @[set_extra()]. *! *! @returns *! Returns the object being called. */ static void html_get_extra(INT32 args) { pop_n_elems(args); if (THIS->extra_args) ref_push_array (THIS->extra_args); else ref_push_array (&empty_array); } /*! @decl string splice_arg(void|string name) *! *! If given a string, it sets the splice argument name to it. It *! returns the old splice argument name. *! *! If a splice argument name is set, it's parsed in all tags, both *! those with callbacks and those without. Wherever it occurs, its *! value (after being parsed for entities in the normal way) is *! inserted directly into the tag. E.g: *! *! @pre{<foo arg1="val 1" splice="arg2='val 2' arg3" arg4>@} *! *! becomes *! *! @pre{<foo arg1="val 1" arg2='val 2' arg3 arg4>@} *! *! if @expr{"splice"@} is set as the splice argument name. */ static void html_splice_arg (INT32 args) { struct pike_string *old = THIS->splice_arg; check_all_args("splice_arg",args,BIT_VOID|BIT_STRING|BIT_INT,0); if (args) { if (TYPEOF(sp[-args]) == T_STRING) add_ref (THIS->splice_arg = sp[-args].u.string); else if (sp[-args].u.integer) SIMPLE_BAD_ARG_ERROR ("splice_arg", 1, "string or zero"); else THIS->splice_arg = NULL; } pop_n_elems(args); if (old) push_string (old); else push_int (0); } /*! @decl int case_insensitive_tag(void|int value) *! *! All tags and containers are matched case insensitively, and *! argument names are converted to lowercase. Tags added with *! @[add_quote_tag()] are not affected, though. Switching to case *! insensitive mode and back won't preserve the case of registered *! tags and containers. */ /*! @decl int ignore_tags(void|int value) *! *! Do not look for tags at all. Normally tags are matched even when *! there's no callbacks for them at all. When this is set, the tag *! delimiters @expr{'<'@} and @expr{'>'@} will be treated as any *! normal character. */ /*! @decl int ignore_unknown(void|int value) *! *! Treat unknown tags and entities as text data, continuing parsing *! for tags and entities inside them. *! *! @note *! When functions are specified with @[_set_tag_callback()] or *! @[_set_entity_callback()], all tags or entities, respectively, *! are considered known. However, if one of those functions return *! 1 and ignore_unknown is set, they are treated as text data *! instead of making another call to the same function again. */ /*! @decl int lazy_argument_end(void|int value) *! *! A @expr{'>'@} in a tag argument closes both the argument and the *! tag, even if the argument is quoted. */ /*! @decl int lazy_entity_end(void|int value) *! *! Normally, the parser search indefinitely for the entity end *! character (i.e. @expr{';'@}). When this flag is set, the *! characters @expr{'&'@}, @expr{'<'@}, @expr{'>'@}, @expr{'"'@}, *! @expr{'''@}, and any whitespace breaks the search for the entity *! end, and the entity text is then ignored, i.e. treated as *! data. */ /*! @decl int match_tag(void|int value) *! *! Unquoted nested tag starters and enders will be balanced when *! parsing tags. This is the default. */ /*! @decl int max_parse_depth(void|int value) *! *! Maximum recursion depth during parsing. Recursion occurs when a *! tag/container/entity/quote tag callback function returns a string *! to be reparsed. The default value is @expr{10@}. */ /*! @decl int mixed_mode(void|int value) *! *! Allow callbacks to return arbitrary data in the arrays, which will *! be concatenated in the output. */ /*! @decl int reparse_strings(void|int value) *! *! When a plain string is used as a tag/container/entity/quote tag *! callback, it's not reparsed if this flag is unset. Setting it *! causes all such strings to be reparsed. */ /*! @decl int ws_before_tag_name(void|int value) *! *! Allow whitespace between the tag start character and the tag *! name. */ /*! @decl int xml_tag_syntax(void|int value) *! *! Whether or not to use XML syntax to tell empty tags and container *! tags apart. *! *! @int *! @value 0 *! Use HTML syntax only. If there's a @expr{'/'@} last in a tag, *! it's just treated as any other argument. *! @value 1 *! Use HTML syntax, but ignore a @expr{'/'@} if it comes last in *! a tag. This is the default. *! @value 2 *! Use XML syntax, but when a tag that does not end with *! @expr{'/>'@} is found which only got a non-container tag *! callback, treat it as a non-container (i.e. don't start to *! seek for the container end). *! @value 3 *! Use XML syntax only. If a tag got both container and *! non-container callbacks, the non-container callback is called *! when the empty element form (i.e. the one ending with *! @expr{'/>'@}) is used, and the container callback otherwise. *! If only a container callback exists, it gets the empty string *! as content when there's none to be parsed. If only a *! non-container callback exists, it will be called (without the *! content argument) for both kinds of tags. *! @endint */ static void html_ignore_tags(INT32 args) { int o=!(THIS->flags & FLAG_PARSE_TAGS); check_all_args("ignore_tags",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags &= ~FLAG_PARSE_TAGS; else THIS->flags |= FLAG_PARSE_TAGS; THIS->top.parse_tags = THIS->flags & FLAG_PARSE_TAGS; } pop_n_elems(args); push_int(o); } static void html_case_insensitive_tag(INT32 args) { int o=!!(THIS->flags & FLAG_CASE_INSENSITIVE_TAG); check_all_args("case_insensitive_tag",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_CASE_INSENSITIVE_TAG; else THIS->flags &= ~FLAG_CASE_INSENSITIVE_TAG; } pop_n_elems(args); if (args && (THIS->flags & FLAG_CASE_INSENSITIVE_TAG) && !o) { INT32 e; struct keypair *k; struct mapping_data *md; md = THIS->maptag->data; NEW_MAPPING_LOOP(md) { push_svalue(&k->ind); f_lower_case(1); push_svalue(&k->val); } f_aggregate_mapping(m_sizeof(THIS->maptag) * 2); free_mapping(THIS->maptag); THIS->maptag=(--sp)->u.mapping; md = THIS->mapcont->data; NEW_MAPPING_LOOP(md) { push_svalue(&k->ind); f_lower_case(1); push_svalue(&k->val); } f_aggregate_mapping(m_sizeof(THIS->mapcont) * 2); free_mapping(THIS->mapcont); THIS->mapcont=(--sp)->u.mapping; } push_int(o); } static void html_lazy_argument_end(INT32 args) { int o=!!(THIS->flags & FLAG_LAZY_END_ARG_QUOTE); check_all_args("lazy_argument_end",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_LAZY_END_ARG_QUOTE; else THIS->flags &= ~FLAG_LAZY_END_ARG_QUOTE; recalculate_argq(THIS); } pop_n_elems(args); push_int(o); } static void html_lazy_entity_end(INT32 args) { int o=!!(THIS->flags & FLAG_LAZY_ENTITY_END); check_all_args("lazy_entity_end",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_LAZY_ENTITY_END; else THIS->flags &= ~FLAG_LAZY_ENTITY_END; } pop_n_elems(args); push_int(o); } /*! @decl int nestling_entity_end(void|int value) *! */ static void html_nestling_entity_end(INT32 args) { int o=!!(THIS->flags & FLAG_NESTLING_ENTITY_END); check_all_args("nestling_entity_end",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_NESTLING_ENTITY_END; else THIS->flags &= ~FLAG_NESTLING_ENTITY_END; } pop_n_elems(args); push_int(o); } static void html_match_tag(INT32 args) { int o=!!(THIS->flags & FLAG_MATCH_TAG); check_all_args("match_tag",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_MATCH_TAG; else THIS->flags &= ~FLAG_MATCH_TAG; } pop_n_elems(args); push_int(o); } static void html_mixed_mode(INT32 args) { int o=THIS->out_max_shift < 0; check_all_args("mixed_mode",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) { if (!o) { struct out_piece *f; size_t c; THIS->out_max_shift = -1; /* Got to count the entries in the output queue. */ for (f = THIS->out, c = 0; f; f = f->next) c++; THIS->out_length = c; } } else if (o) { struct out_piece *f; int max_shift = 0; size_t length; for (f = THIS->out, length = 0; f; f = f->next) { if (TYPEOF(f->v) != T_STRING) Pike_error ("Cannot switch from mixed mode " "with nonstrings in the output queue.\n"); if (f->v.u.string->size_shift > max_shift) max_shift = f->v.u.string->size_shift; length += f->v.u.string->len; } THIS->out_max_shift = max_shift; THIS->out_length = length; } } pop_n_elems(args); push_int(o); } static void html_reparse_strings(INT32 args) { int o=!!(THIS->flags & FLAG_REPARSE_STRINGS); check_all_args("reparse_strings",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_REPARSE_STRINGS; else THIS->flags &= ~FLAG_REPARSE_STRINGS; } pop_n_elems(args); push_int(o); } static void html_ignore_unknown(INT32 args) { int o=!!(THIS->flags & FLAG_IGNORE_UNKNOWN); check_all_args("ignore_unknown",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_IGNORE_UNKNOWN; else THIS->flags &= ~FLAG_IGNORE_UNKNOWN; } pop_n_elems(args); push_int(o); } static void html_xml_tag_syntax(INT32 args) { int o=THIS->flags; check_all_args("xml_tag_syntax",args,BIT_VOID|BIT_INT,0); if (args) { THIS->flags &= ~(FLAG_XML_TAGS|FLAG_STRICT_TAGS); switch (sp[-args].u.integer) { case 0: THIS->flags |= FLAG_STRICT_TAGS; break; case 1: break; case 2: THIS->flags |= FLAG_XML_TAGS; break; case 3: THIS->flags |= FLAG_XML_TAGS|FLAG_STRICT_TAGS; break; default: SIMPLE_BAD_ARG_ERROR ("xml_tag_syntax", 1, "integer 0..3"); } recalculate_argq(THIS); } pop_n_elems(args); if (o & FLAG_XML_TAGS) o = o & FLAG_STRICT_TAGS ? 3 : 2; else o = o & FLAG_STRICT_TAGS ? 0 : 1; push_int(o); } static void html_ws_before_tag_name(INT32 args) { int o=!!(THIS->flags & FLAG_WS_BEFORE_TAG_NAME); check_all_args("ws_before_tag_name",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_WS_BEFORE_TAG_NAME; else THIS->flags &= ~FLAG_WS_BEFORE_TAG_NAME; } pop_n_elems(args); push_int(o); } static void html_max_stack_depth(INT32 args) { int o=THIS->max_stack_depth; check_all_args("max_stack_depth",args,BIT_VOID|BIT_INT,0); if (args) { THIS->max_stack_depth = sp[-args].u.integer; } pop_n_elems(args); push_int(o); } #ifdef HTML_DEBUG static void html_debug_mode(INT32 args) { int o=!!(THIS->flags & FLAG_DEBUG_MODE); check_all_args("debug_mode",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_DEBUG_MODE; else THIS->flags &= ~FLAG_DEBUG_MODE; } pop_n_elems(args); push_int(o); } #endif /*! @decl int ignore_comments(void|int value) *! */ static void html_ignore_comments(INT32 args) { int o=!!(THIS->flags & FLAG_IGNORE_COMMENTS); check_all_args("debug_mode",args,BIT_VOID|BIT_INT,0); if (args) { if (sp[-args].u.integer) THIS->flags |= FLAG_IGNORE_COMMENTS; else THIS->flags &= ~FLAG_IGNORE_COMMENTS; recalculate_argq(THIS); } pop_n_elems(args); push_int(o); } /*! @decl int quote_stapling(int|void enable) *! *! Enable old-style attribute quoting by stapling. *! *! @param enable *! Enable/disable the mode. Defaults to *! keeping the old setting. *! *! @returns *! Returns the prior setting. *! *! @note *! Any use of this mode is discouraged, and is *! only provided for compatibility with versions *! of Pike prior to 8.0. *! *! @note *! Note also that this mode will output runtime *! warnings whenever the mode has had an effect *! on the parsing. */ static void html_quote_stapling(INT32 args) { int of = !!(THIS->flags & FLAG_QUOTE_STAPLING); int f = of; get_all_args("quote_stapling", args, ".%d", &f); if (f) { THIS->flags |= FLAG_QUOTE_STAPLING; } else { THIS->flags &= ~FLAG_QUOTE_STAPLING; } push_int(of); } /*! @endclass */ /*! @endmodule */ /****** module init *********************************/ #define tCbret tOr4(tZero,tInt1,tStr,tArr(tMixed)) #define tCbfunc(X) tOr(tFunc(tNone,tCbret),tFunc(tObjImpl_PARSER_HTML X,tCbret)) #define tTodo(X) tOr4(tZero,tStr,tCbfunc(X),tArray) #define tTagargs tMap(tStr,tStr) #define t_Todo tOr3(tStr,tArr(tMixed),tFuncV(tObjImpl_PARSER_HTML tStr,tMix,tCbret)) void init_parser_html(void) { size_t offset; offset = ADD_STORAGE(struct parser_html_storage); PIKE_MAP_VARIABLE(" maptag", offset + OFFSETOF(parser_html_storage, maptag), tMap(tStr,tTodo(tTagargs)), T_MAPPING, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" mapcont", offset + OFFSETOF(parser_html_storage, mapcont), tMap(tStr,tTodo(tTagargs tStr)), T_MAPPING, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" mapentity", offset + OFFSETOF(parser_html_storage, mapentity), tMap(tStr,tTodo(tNone)), T_MAPPING, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" mapqtag", offset + OFFSETOF(parser_html_storage, mapqtag), tMap(tStr,tTodo(tStr)), T_MAPPING, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" callback__tag", offset + OFFSETOF(parser_html_storage, callback__tag), tFuncV(tObjImpl_PARSER_HTML tStr,tMix,tCbret), T_MIXED, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" callback__data", offset + OFFSETOF(parser_html_storage, callback__data), tFuncV(tObjImpl_PARSER_HTML tStr,tMix,tCbret), T_MIXED, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" callback__entity", offset + OFFSETOF(parser_html_storage, callback__entity), tFuncV(tObjImpl_PARSER_HTML tStr,tMix,tCbret), T_MIXED, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" splice_arg", offset + OFFSETOF(parser_html_storage, splice_arg), tString, T_STRING, ID_PROTECTED|ID_PRIVATE); PIKE_MAP_VARIABLE(" extra_args", offset + OFFSETOF(parser_html_storage, extra_args), tArray, T_ARRAY, ID_PROTECTED|ID_PRIVATE); set_init_callback(init_html_struct); set_exit_callback(exit_html_struct); ADD_FUNCTION("create",html_create,tFunc(tNone,tVoid),ID_PROTECTED); ADD_FUNCTION("clone",html_clone,tFuncV(tNone,tMixed,tObjImpl_PARSER_HTML),0); /* feed control */ ADD_FUNCTION("feed",html_feed, tOr(tFunc(tNone,tObjImpl_PARSER_HTML), tFunc(tStr tOr(tVoid,tInt),tObjImpl_PARSER_HTML)),0); ADD_FUNCTION("finish",html_finish, tFunc(tOr(tVoid,tStr),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("read",html_read, tFunc(tOr(tVoid,tInt),tOr(tStr,tArr(tMixed))),0); ADD_FUNCTION("write_out",html_write_out, tFuncV(tNone,tOr(tStr,tMixed),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("feed_insert",html_feed_insert, tFunc(tStr,tObjImpl_PARSER_HTML),0); /* query */ ADD_FUNCTION("current",html_current,tFunc(tNone,tStr),0); ADD_FUNCTION("at",html_at,tFunc(tNone,tArr(tInt)),0); ADD_FUNCTION("at_line",html_at_line,tFunc(tNone,tInt),0); ADD_FUNCTION("at_char",html_at_char,tFunc(tNone,tInt),0); ADD_FUNCTION("at_column",html_at_column,tFunc(tNone,tInt),0); ADD_FUNCTION("tag_name",html_tag_name,tFunc(tNone,tStr),0); ADD_FUNCTION("tag_args",html_tag_args, tFunc(tOr(tVoid,tSetvar(1,tMixed)), tMap(tStr,tOr(tStr,tVar(1)))),0); ADD_FUNCTION("tag_content",html_tag_content,tFunc(tNone,tStr),0); ADD_FUNCTION("tag",html_tag, tFunc(tOr(tVoid,tSetvar(1,tMixed)), tArr(tOr(tStr,tMap(tStr,tOr(tStr,tVar(1)))))),0); ADD_FUNCTION("context",html_context, tFunc(tNone,tStr),0); /* callback setup */ ADD_FUNCTION("add_tag",html_add_tag, tFunc(tStr tTodo(tTagargs),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("add_container",html_add_container, tFunc(tStr tTodo(tTagargs tStr),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("add_entity",html_add_entity, tFunc(tStr tTodo(""),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("add_quote_tag",html_add_quote_tag, tOr(tFunc(tStr tTodo(tStr) tStr,tObjImpl_PARSER_HTML), tFunc(tStr tZero,tObjImpl_PARSER_HTML)),0); ADD_FUNCTION("add_tags",html_add_tags, tFunc(tMap(tStr,tTodo( tTagargs )),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("add_containers",html_add_containers, tFunc(tMap(tStr,tTodo( tTagargs tStr )),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("add_entities",html_add_entities, tFunc(tMap(tStr,tTodo( "" )),tObjImpl_PARSER_HTML),0); ADD_FUNCTION("clear_tags",html_clear_tags, tFunc(tNone,tObjImpl_PARSER_HTML),0); ADD_FUNCTION("clear_containers",html_clear_containers, tFunc(tNone,tObjImpl_PARSER_HTML),0); ADD_FUNCTION("clear_entities",html_clear_entities, tFunc(tNone,tObjImpl_PARSER_HTML),0); ADD_FUNCTION("clear_quote_tags",html_clear_quote_tags, tFunc(tNone,tObjImpl_PARSER_HTML),0); ADD_FUNCTION("tags",html_tags, tFunc(tNone,tMap(tStr,tTodo( tTagargs ))),0); ADD_FUNCTION("containers",html_containers, tFunc(tNone,tMap(tStr,tTodo( tTagargs tStr ))),0); ADD_FUNCTION("entities",html_entities, tFunc(tNone,tMap(tStr,tTodo( "" ))),0); ADD_FUNCTION("quote_tags",html_quote_tags, tFunc(tNone,tMap(tStr,tTodo( tStr ))),0); /* setup */ ADD_FUNCTION("set_extra",html_set_extra, tFuncV(tNone,tMix,tObjImpl_PARSER_HTML),0); ADD_FUNCTION("get_extra",html_get_extra, tFunc(tNone,tArray),0); ADD_FUNCTION("splice_arg",html_splice_arg, tFunc(tOr(tVoid,tStr),tStr),0); ADD_FUNCTION("ignore_tags",html_ignore_tags, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("max_stack_depth",html_max_stack_depth, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("case_insensitive_tag",html_case_insensitive_tag, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("lazy_argument_end",html_lazy_argument_end, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("lazy_entity_end",html_lazy_entity_end, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("nestling_entity_end",html_nestling_entity_end, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("match_tag",html_match_tag, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("mixed_mode",html_mixed_mode, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("reparse_strings",html_reparse_strings, tFunc(tOr(tVoid,tInt),tInt),0); ADD_FUNCTION("ignore_unknown",html_ignore_unknown, tFunc(tOr(tVoid,tInt),tInt),0);

pike.git/ src/ modules/ Parser/ html.c > 5f58bdeecb41320455102b95b9180cba3c5d04f5 [Annotate]