pike.git/src/builtin_functions.c:8fa8b4880055e55db1b042e32533e636eb82d811

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For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.h" #include "interpret.h" #include "svalue.h" #include "pike_macros.h" #include "object.h" #include "program.h" #include "array.h" #include "pike_error.h" #include "constants.h" #include "mapping.h" #include "stralloc.h" #include "multiset.h" #include "pike_types.h" #include "pike_rusage.h" #include "operators.h" #include "fsort.h" #include "callback.h" #include "gc.h" #include "backend.h" #include "main.h" #include "pike_memory.h" #include "threads.h" #include "time_stuff.h" #include "version.h" #include "encode.h" #include <math.h> #include <ctype.h> #include "module_support.h" #include "module.h" #include "opcodes.h" #include "cyclic.h" #include "signal_handler.h" #include "pike_security.h" #include "builtin_functions.h" #include "bignum.h" #include "peep.h" #include "docode.h" #include "lex.h" #include "pike_float.h" #include "pike_compiler.h" #include <errno.h> #ifdef HAVE_POLL #ifdef HAVE_POLL_H #include <poll.h> #endif /* HAVE_POLL_H */ #ifdef HAVE_SYS_POLL_H #include <sys/poll.h> #endif /* HAVE_SYS_POLL_H */ #endif /* HAVE_POLL */ #ifdef HAVE_CRYPT_H #include <crypt.h> #endif /* #define DIFF_DEBUG */ /* #define ENABLE_DYN_DIFF */ /*! @decl int equal(mixed a, mixed b) *! *! This function checks if the values @[a] and @[b] are equal. *! *! For all types but arrays, multisets and mappings, this operation is *! the same as doing @expr{@[a] == @[b]@}. *! For arrays, mappings and multisets however, their contents are checked *! recursively, and if all their contents are the same and in the same *! place, they are considered equal. *! *! @seealso *! @[copy_value()] */ PMOD_EXPORT void f_equal(INT32 args) { int i; if(args != 2) SIMPLE_TOO_FEW_ARGS_ERROR("equal", 2); i=is_equal(Pike_sp-2,Pike_sp-1); pop_n_elems(args); push_int(i); } /*! @decl array aggregate(mixed ... elements) *! *! Construct an array with the arguments as indices. *! *! This function could be written in Pike as: *! @code *! array aggregate(mixed ... elems) { return elems; } *! @endcode *! *! @note *! Arrays are dynamically allocated there is no need to declare them *! like @expr{int a[10]=allocate(10);@} (and it isn't possible either) like *! in C, just @expr{array(int) a=allocate(10);@} will do. *! *! @seealso *! @[sizeof()], @[arrayp()], @[allocate()] */ PMOD_EXPORT void debug_f_aggregate(INT32 args) { struct array *a; a=aggregate_array(args); push_array(a); /* beware, macro */ } static node *optimize_f_aggregate(node *n) { /* Split long argument lists into multiple function calls. * * aggregate(...) ==> `+(aggregate(...arg32), aggregate(arg33...), ...) * * Also removes splices. * * Note: We assume that the argument list is in left-recursive form. */ node *args = CDR(n); node *new_args = NULL; node *add_args = NULL; int count; if (!args) return NULL; args->parent = NULL; for (count = 0; args->token == F_ARG_LIST; args = CAR(args)) { if (CDR(args) && CDR(args)->token == F_PUSH_ARRAY) { /* Splices have a weight of 16. */ count += 16; } else { count++; } if (!CAR(args)) break; CAR(args)->parent = args; } if (args->token == F_PUSH_ARRAY) { /* Last argument is a splice */ count += 16; } else if (args->token != F_ARG_LIST) { count++; } /* Ignore cases with 32 or less arguments. */ if (count <= 32) { CDR(n)->parent = n; return NULL; } /* * Perform the actual rewrite. * * Start with the last arg, and work towards the first. */ count = 0; if (args->token != F_ARG_LIST) { if (args->token == F_PUSH_ARRAY) { /* Splice operator. */ add_args = copy_node(CAR(args)); } else { new_args = copy_node(args); count = 1; } args = args->parent; } for(; args; args = args->parent) { if (!CDR(args)) continue; if (CDR(args)->token == F_PUSH_ARRAY) { if (count) { add_args = mknode(F_ARG_LIST, add_args, mkapplynode(copy_node(CAR(n)), new_args)); new_args = NULL; count = 0; } add_args = mknode(F_ARG_LIST, add_args, copy_node(CADR(args))); } else { new_args = mknode(F_ARG_LIST, new_args, copy_node(CDR(args))); count++; if (count > 31) { add_args = mknode(F_ARG_LIST, add_args, mkapplynode(copy_node(CAR(n)), new_args)); new_args = NULL; count = 0; } } } if (count) { add_args = mknode(F_ARG_LIST, add_args, mkapplynode(copy_node(CAR(n)), new_args)); new_args = NULL; count = 0; } CDR(n)->parent = n; return mkefuncallnode("`+", add_args); } /*! @decl __deprecated__ int hash_7_4(string s) *! @decl __deprecated__ int hash_7_4(string s, int max) *! *! @deprecated 7.4::hash *! *! @seealso *! @[7.4::hash()] */ /*! @decl __deprecated__ int hash_7_0(string s) *! @decl __deprecated__ int hash_7_0(string s, int max) *! *! @deprecated 7.0::hash *! *! @seealso *! @[7.0::hash()] */ /*! @namespace 7.4:: */ #define MK_HASHMEM(NAME, TYPE) ATTRIBUTE((const)) \ static INLINE size_t NAME(const TYPE *str, ptrdiff_t len, ptrdiff_t maxn) \ { \ size_t ret,c; \ \ ret = len*92873743; \ \ len = MINIMUM(maxn,len); \ for(; len>=0; len--) \ { \ c=str++[0]; \ ret ^= ( ret << 4 ) + c ; \ ret &= 0x7fffffff; \ } \ return ret; \ } MK_HASHMEM(simple_hashmem, unsigned char) MK_HASHMEM(simple_hashmem1, p_wchar1) MK_HASHMEM(simple_hashmem2, p_wchar2) /*! @decl int hash(string s) *! @decl int hash(string s, int max) *! *! Return an integer derived from the string @[s]. The same string *! will always hash to the same value, also between processes. *! *! If @[max] is given, the result will be >= 0 and < @[max], *! otherwise the result will be >= 0 and <= 0x7fffffff. *! *! @note *! This function is provided for backward compatibility reasons. *! *! This function is byte-order dependant for wide strings. *! *! @seealso *! @[predef::hash()], @[7.0::hash()] */ static void f_hash_7_4(INT32 args) { size_t i = 0; struct pike_string *s = Pike_sp[-args].u.string; if(!args) SIMPLE_TOO_FEW_ARGS_ERROR("7.4::hash",1); if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_BAD_ARG_ERROR("7.4::hash", 1, "string"); i = simple_hashmem((unsigned char *)s->str, s->len<<s->size_shift, 100<<s->size_shift); if(args > 1) { if(TYPEOF(Pike_sp[1-args]) != T_INT) SIMPLE_BAD_ARG_ERROR("7.4::hash",2,"int"); if(!Pike_sp[1-args].u.integer) PIKE_ERROR("7.4::hash", "Modulo by zero.\n", Pike_sp, args); i%=(unsigned INT32)Pike_sp[1-args].u.integer; } pop_n_elems(args); push_int64(i); } /*! @endnamespace */ /*! @namespace 7.0:: */ ATTRIBUTE((const)) static INLINE size_t hashstr(const unsigned char *str, ptrdiff_t maxn) { size_t ret,c; if(!(ret=str++[0])) return ret; for(; maxn>=0; maxn--) { c=str++[0]; if(!c) break; ret ^= ( ret << 4 ) + c ; ret &= 0x7fffffff; } return ret; } /*! @decl int hash(string s) *! @decl int hash(string s, int max) *! *! Return an integer derived from the string @[s]. The same string *! always hashes to the same value, also between processes. *! *! If @[max] is given, the result will be >= 0 and < @[max], *! otherwise the result will be >= 0 and <= 0x7fffffff. *! *! @note *! This function is provided for backward compatibility reasons. *! *! This function is not NUL-safe, and is byte-order dependant. *! *! @seealso *! @[predef::hash()], @[7.4::hash()] */ static void f_hash_7_0( INT32 args ) { struct pike_string *s = Pike_sp[-args].u.string; unsigned int i; if(!args) SIMPLE_TOO_FEW_ARGS_ERROR("7.0::hash",1); if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_BAD_ARG_ERROR("7.0::hash", 1, "string"); if( s->size_shift ) { f_hash_7_4( args ); return; } i = DO_NOT_WARN((unsigned int)hashstr( (unsigned char *)s->str, MINIMUM(100,s->len))); if(args > 1) { if(TYPEOF(Pike_sp[1-args]) != T_INT) SIMPLE_BAD_ARG_ERROR("7.0::hash",2,"int"); if(!Pike_sp[1-args].u.integer) PIKE_ERROR("7.0::hash", "Modulo by zero.\n", Pike_sp, args); i%=(unsigned INT32)Pike_sp[1-args].u.integer; } pop_n_elems(args); push_int( i ); } /*! @endnamespace */ /*! @decl int hash(string s) *! @decl int hash(string s, int max) *! *! Return an integer derived from the string @[s]. The same string *! always hashes to the same value, also between processes, *! architectures, and Pike versions (see compatibility notes below, *! though). *! *! If @[max] is given, the result will be >= 0 and < @[max], *! otherwise the result will be >= 0 and <= 0x7fffffff. *! *! @note *! The hash algorithm was changed in Pike 7.5. If you want a hash *! that is compatible with Pike 7.4 and earlier, use @[7.4::hash()]. *! The difference only affects wide strings. *! *! The hash algorithm was also changed in Pike 7.1. If you want a hash *! that is compatible with Pike 7.0 and earlier, use @[7.0::hash()]. *! *! @note *! This hash function differs from the one provided by @[hash_value()], *! in that @[hash_value()] returns a process specific value. *! *! @seealso *! @[7.0::hash()], @[7.4::hash()], @[hash_value] */ PMOD_EXPORT void f_hash(INT32 args) { size_t i = 0; struct pike_string *s; if(!args) SIMPLE_TOO_FEW_ARGS_ERROR("hash",1); if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_BAD_ARG_ERROR("hash", 1, "string"); s = Pike_sp[-args].u.string; switch(s->size_shift) { case 0: i = simple_hashmem(STR0(s), s->len, 100); break; case 1: i = simple_hashmem1(STR1(s), s->len, 100); break; case 2: i = simple_hashmem2(STR2(s), s->len, 100); break; #ifdef PIKE_DEBUG default: Pike_fatal("hash(): Unsupported string shift: %d\n", s->size_shift); break; #endif } if(args > 1) { if(TYPEOF(Pike_sp[1-args]) != T_INT) SIMPLE_BAD_ARG_ERROR("hash",2,"int"); if(Pike_sp[1-args].u.integer <= 0) PIKE_ERROR("hash", "Modulo < 1.\n", Pike_sp, args); i%=(unsigned INT32)Pike_sp[1-args].u.integer; } pop_n_elems(args); push_int64(i); } /*! @decl int hash_value (mixed value) *! *! Return a hash value for the argument. It's an integer in the *! native integer range. *! *! The hash will be the same for the same value in the running *! process only (the memory address is typically used as the basis *! for the hash value). *! *! If the value is an object with an @[lfun::__hash], that function *! is called and its result returned. *! *! @note *! This is the hashing method used by mappings. *! *! @seealso *! @[hash()], @[lfun::__hash()] */ void f_hash_value(INT32 args) { unsigned INT32 h; if(!args) SIMPLE_TOO_FEW_ARGS_ERROR("hash_value",1); h = hash_svalue (Pike_sp - args); pop_n_elems (args); push_int (h); } /*! @decl mixed copy_value(mixed value) *! *! Copy a value recursively. *! *! If the result value is changed destructively (only possible for *! multisets, arrays and mappings) the copied value will not be changed. *! *! The resulting value will always be equal to the copied (as tested with *! the function @[equal()]), but they may not the the same value (as tested *! with @[`==()]). *! *! @seealso *! @[equal()] */ PMOD_EXPORT void f_copy_value(INT32 args) { if(!args) SIMPLE_TOO_FEW_ARGS_ERROR("copy_value",1); pop_n_elems(args-1); push_undefined(); /* Placeholder */ copy_svalues_recursively_no_free(Pike_sp-1,Pike_sp-2,1,0); free_svalue(Pike_sp-2); move_svalue (Pike_sp - 2, Pike_sp - 1); Pike_sp--; dmalloc_touch_svalue(Pike_sp-1); } struct case_info { INT32 low; /* low end of range. */ INT16 mode; INT16 data; }; #define CIM_NONE 0 /* Case-less */ #define CIM_UPPERDELTA 1 /* Upper-case, delta to lower-case in data */ #define CIM_LOWERDELTA 2 /* Lower-case, -delta to upper-case in data */ #define CIM_CASEBIT 3 /* Some case, case mask in data */ #define CIM_CASEBITOFF 4 /* Same as above, but also offset by data */ #define CIM_LONGUPPERDELTA 5 /* Upper-case, delta + 0x7fff. */ #define CIM_LONGLOWERDELTA 6 /* Lower-case, delta + 0x7fff. */ static const struct case_info case_info[] = { #include "case_info.h" { 0x7fffffff, CIM_NONE, 0x0000, }, /* End sentinel. */ }; static struct case_info *find_ci(INT32 c) { static struct case_info *cache = NULL; struct case_info *ci = cache; int lo = 0; int hi = NELEM(case_info); if ((c < 0) || (c > 0xeffff)) { /* Negative, or plane 15 and above. */ return NULL; } if ((ci) && (ci[0].low <= c) && (ci[1].low > c)) { return ci; } while (lo != hi-1) { int mid = (lo + hi)/2; if (case_info[mid].low < c) { lo = mid; } else if (case_info[mid].low == c) { lo = mid; break; } else { hi = mid; } } return(cache = (struct case_info *)case_info + lo); } static struct case_info *find_ci_shift0(INT32 c) { static struct case_info *cache = NULL; struct case_info *ci = cache; int lo = 0; int hi = CASE_INFO_SHIFT0_HIGH; if ((c < 0) || (c > 0xefffff)) { /* Negative, or plane 15 and above. */ return NULL; } if ((ci) && (ci[0].low <= c) && (ci[1].low > c)) { return ci; } while (lo != hi-1) { int mid = (lo + hi)>>1; if (case_info[mid].low < c) { lo = mid; } else if (case_info[mid].low == c) { lo = mid; break; } else { hi = mid; } } return(cache = (struct case_info *)case_info + lo); } #define DO_LOWER_CASE(C) do {\ INT32 c = C; \ if(c<0xb5){if(c >= 'A' && c <= 'Z' ) C=c+0x20; } \ /*else if(c==0xa77d) C=0x1d79;*/ else { \ struct case_info *ci = find_ci(c); \ if (ci) { \ switch(ci->mode) { \ case CIM_NONE: case CIM_LOWERDELTA: case CIM_LONGLOWERDELTA: break; \ case CIM_UPPERDELTA: C = c + ci->data; break; \ case CIM_CASEBIT: C = c | ci->data; break; \ case CIM_CASEBITOFF: C = ((c - ci->data) | ci->data) + ci->data; break; \ case CIM_LONGUPPERDELTA: \ C = c + ci->data + ( ci->data>0 ? 0x7fff : -0x8000 ); break; \ DO_IF_DEBUG( default: Pike_fatal("lower_case(): Unknown case_info mode: %d\n", ci->mode); ) \ } \ }} \ } while(0) #define DO_LOWER_CASE_SHIFT0(C) do {\ INT32 c = C; \ if(c<0xb5){if(c >= 'A' && c <= 'Z' ) C=c+0x20;}else {\ struct case_info *ci = find_ci_shift0(c); \ if (ci) { \ switch(ci->mode) { \ case CIM_NONE: case CIM_LOWERDELTA: break; \ case CIM_UPPERDELTA: C = c + ci->data; break; \ case CIM_CASEBIT: C = c | ci->data; break; \ case CIM_CASEBITOFF: C = ((c - ci->data) | ci->data) + ci->data; break; \ DO_IF_DEBUG( default: Pike_fatal("lower_case(): Unknown case_info mode: %d\n", ci->mode); ) \ } \ }} \ } while(0) #define DO_UPPER_CASE(C) do {\ INT32 c = C; \ if(c<0xb5){if(c >= 'a' && c <= 'z' ) C=c-0x20; } \ /*else if(c==0x1d79) C=0xa77d;*/ else {\ struct case_info *ci = find_ci(c); \ if (ci) { \ switch(ci->mode) { \ case CIM_NONE: case CIM_UPPERDELTA: case CIM_LONGUPPERDELTA: break; \ case CIM_LOWERDELTA: C = c - ci->data; break; \ case CIM_CASEBIT: C = c & ~ci->data; break; \ case CIM_CASEBITOFF: C = ((c - ci->data)& ~ci->data) + ci->data; break; \ case CIM_LONGLOWERDELTA: \ C = c - ci->data - ( ci->data>0 ? 0x7fff : -0x8000 ); break; \ DO_IF_DEBUG( default: Pike_fatal("upper_case(): Unknown case_info mode: %d\n", ci->mode); ) \ } \ }} \ } while(0) #define DO_UPPER_CASE_SHIFT0(C) do {\ INT32 c = C; \ if(c<0xb5){if(c >= 'a' && c <= 'z' ) C=c-0x20;}else {\ struct case_info *ci = find_ci_shift0(c); \ if (ci) { \ switch(ci->mode) { \ case CIM_NONE: case CIM_UPPERDELTA: break; \ case CIM_LOWERDELTA: C = c - ci->data; break; \ case CIM_CASEBIT: C = c & ~ci->data; break; \ case CIM_CASEBITOFF: C = ((c - ci->data)& ~ci->data) + ci->data; break; \ DO_IF_DEBUG( default: Pike_fatal("lower_case(): Unknown case_info mode: %d\n", ci->mode); ) \ } \ }} \ } while(0) /*! @decl string lower_case(string s) *! @decl int lower_case(int c) *! *! Convert a string or character to lower case. *! *! @returns *! Returns a copy of the string @[s] with all upper case characters *! converted to lower case, or the character @[c] converted to lower *! case. *! *! @note *! Assumes the string or character to be coded according to *! ISO-10646 (aka Unicode). If they are not, @[Charset.decoder] can *! do the initial conversion for you. *! *! @note *! Prior to Pike 7.5 this function only accepted strings. *! *! @seealso *! @[upper_case()], @[Charset.decoder] */ PMOD_EXPORT void f_lower_case(INT32 args) { ptrdiff_t i; struct pike_string *orig; struct pike_string *ret; check_all_args("lower_case", args, BIT_STRING|BIT_INT, 0); if (TYPEOF(Pike_sp[-args]) == T_INT) { /* NOTE: Performs the case change in place. */ DO_LOWER_CASE(Pike_sp[-args].u.integer); pop_n_elems(args-1); return; } orig = Pike_sp[-args].u.string; if( orig->flags & STRING_IS_LOWERCASE ) return; ret = begin_wide_shared_string(orig->len, orig->size_shift); MEMCPY(ret->str, orig->str, orig->len << orig->size_shift); i = orig->len; if (!orig->size_shift) { p_wchar0 *str = STR0(ret); while(i--) { DO_LOWER_CASE_SHIFT0(str[i]); } } else if (orig->size_shift == 1) { p_wchar1 *str = STR1(ret); while(i--) { DO_LOWER_CASE(str[i]); } } else if (orig->size_shift == 2) { p_wchar2 *str = STR2(ret); while(i--) { DO_LOWER_CASE(str[i]); } #ifdef PIKE_DEBUG } else { Pike_fatal("lower_case(): Bad string shift:%d\n", orig->size_shift); #endif } ret = end_shared_string(ret); ret->flags |= STRING_IS_LOWERCASE; pop_n_elems(args); push_string(ret); } /*! @decl string upper_case(string s) *! @decl int upper_case(int c) *! *! Convert a string or character to upper case. *! *! @returns *! Returns a copy of the string @[s] with all lower case characters *! converted to upper case, or the character @[c] converted to upper *! case. *! *! @note *! Assumes the string or character to be coded according to *! ISO-10646 (aka Unicode). If they are not, @[Charset.decoder] can *! do the initial conversion for you. *! *! @note *! Prior to Pike 7.5 this function only accepted strings. *! *! @seealso *! @[lower_case()], @[Charset.decoder] */ PMOD_EXPORT void f_upper_case(INT32 args) { ptrdiff_t i; struct pike_string *orig; struct pike_string *ret; check_all_args("upper_case", args, BIT_STRING|BIT_INT, 0); if (TYPEOF(Pike_sp[-args]) == T_INT) { /* NOTE: Performs the case change in place. */ DO_UPPER_CASE(Pike_sp[-args].u.integer); pop_n_elems(args-1); return; } orig = Pike_sp[-args].u.string; if( orig->flags & STRING_IS_UPPERCASE ) { return; } ret=begin_wide_shared_string(orig->len,orig->size_shift); MEMCPY(ret->str, orig->str, orig->len << orig->size_shift); i = orig->len; if (!orig->size_shift) { p_wchar0 *str = STR0(ret); while(i--) { if(str[i]!=0xff && str[i]!=0xb5) { DO_UPPER_CASE_SHIFT0(str[i]); } else { /* Ok, so our shiftsize 0 string contains 0xff or 0xb5 which prompts for a shiftsize 1 string. */ int j = orig->len; struct pike_string *wret = begin_wide_shared_string(j, 1); p_wchar1 *wstr = STR1(wret); /* Copy what we have done */ while(--j>i) wstr[j] = str[j]; /* upper case the rest */ i++; while(i--) switch( str[i] ) { case 0xff: wstr[i] = 0x178; break; case 0xb5: wstr[i] = 0x39c; break; default: DO_UPPER_CASE_SHIFT0(str[i]); wstr[i] = str[i]; break; } /* Discard the too narrow string and use the new one instead. */ do_free_unlinked_pike_string(ret); ret = wret; break; } } } else if (orig->size_shift == 1) { p_wchar1 *str = STR1(ret); while(i--) { DO_UPPER_CASE(str[i]); } } else if (orig->size_shift == 2) { p_wchar2 *str = STR2(ret); while(i--) { DO_UPPER_CASE(str[i]); } #ifdef PIKE_DEBUG } else { Pike_fatal("lower_case(): Bad string shift:%d\n", orig->size_shift); #endif } pop_n_elems(args); ret = end_shared_string(ret); ret->flags |= STRING_IS_UPPERCASE; push_string(ret); } /*! @decl string random_string(int len) *! *! Returns a string of random characters 0-255 with the length @[len]. */ PMOD_EXPORT void f_random_string(INT32 args) { struct pike_string *ret; INT_TYPE len, e; get_all_args("random_string",args,"%+",&len); ret = begin_shared_string(len); /* Note: Assumes pike_string->str is aligned on a 4 byte boundary * (it is, currently) */ len -= sizeof(INT32)-1; for(e=0;e<len;e+=sizeof(INT32)) ((unsigned INT32 *)(ret->str+e))[0] = DO_NOT_WARN(my_rand()); len += sizeof(INT32)-1; for(;e<len;e++) ret->str[e] = DO_NOT_WARN((char)my_rand()); pop_n_elems(args); push_string(end_shared_string(ret)); } /*! @decl void random_seed(int seed) *! *! This function sets the initial value for the random generator. *! *! @seealso *! @[random()] */ PMOD_EXPORT void f_random_seed(INT32 args) { INT_TYPE i; check_all_args("random_seed",args,BIT_INT | BIT_OBJECT, 0); if(TYPEOF(Pike_sp[-args]) == T_INT) { i=Pike_sp[-args].u.integer; }else{ i=hash_svalue(Pike_sp-args); } my_srand(i); pop_n_elems(args); } /*! @decl int query_num_arg() *! *! Returns the number of arguments given when the previous function was *! called. *! *! This is useful for functions that take a variable number of arguments. *! *! @seealso *! @[call_function()] */ void f_query_num_arg(INT32 args) { pop_n_elems(args); push_int(Pike_fp ? Pike_fp->args : 0); } /*! @decl int search(string haystack, string|int needle, int|void start) *! @decl int search(array haystack, mixed needle, int|void start) *! @decl mixed search(mapping haystack, mixed needle, mixed|void start) *! @decl mixed search(object haystack, mixed needle, mixed|void start) *! *! Search for @[needle] in @[haystack]. Return the position of @[needle] in *! @[haystack] or @expr{-1@} if not found. *! *! If the optional argument @[start] is present search is started at *! this position. *! *! @mixed haystack *! @type string *! When @[haystack] is a string @[needle] must be a string or an int, *! and the first occurrence of the string or int is returned. *! *! @type array *! When @[haystack] is an array, @[needle] is compared only to *! one value at a time in @[haystack]. *! *! @type mapping *! When @[haystack] is a mapping, @[search()] tries to find the index *! connected to the data @[needle]. That is, it tries to lookup the *! mapping backwards. If @[needle] isn't present in the mapping, zero *! is returned, and zero_type() will return 1 for this zero. *! *! @type object *! When @[haystack] is an object implementing @[lfun::_search()], *! the result of calling @[lfun::_search()] with @[needle] will *! be returned. *! *! If @[haystack] is an object that doesn't implement @[lfun::_search()] *! it is assumed to be an @[Iterator], and implement *! @[Iterator()->index()], @[Iterator()->value()], and *! @[Iterator()->next()]. @[search()] will then start comparing *! elements with @[`==()] until a match with @[needle] is found. *! If @[needle] is found @[haystack] will be advanced to the element, *! and the iterator index will be returned. If @[needle] is not *! found, @[haystack] will be advanced to the end (and will thus *! evaluate to false), and a zero with zero_type 1 will be returned. *! @endmixed *! *! @note *! If @[start] is supplied to an iterator object without an *! @[lfun::_search()], @[haystack] will need to implement *! @[Iterator()->set_index()]. *! *! @note *! For mappings and object @[UNDEFINED] will be returned when not found. *! In all other cases @expr{-1@} will be returned when not found. *! *! @seealso *! @[indices()], @[values()], @[zero_type()], @[has_value()], *! @[has_prefix()], @[has_suffix()] */ PMOD_EXPORT void f_search(INT32 args) { ptrdiff_t start; if(args < 2) SIMPLE_TOO_FEW_ARGS_ERROR("search", 2); switch(TYPEOF(Pike_sp[-args])) { case T_STRING: { struct pike_string *haystack = Pike_sp[-args].u.string; start=0; if(args > 2) { if(TYPEOF(Pike_sp[2-args]) != T_INT) SIMPLE_BAD_ARG_ERROR("search", 3, "int"); start=Pike_sp[2-args].u.integer; if(start<0) { bad_arg_error("search", Pike_sp-args, args, 3, "int(0..)", Pike_sp+2-args, "Start must be greater or equal to zero.\n"); } } if(haystack->len < start) bad_arg_error("search", Pike_sp-args, args, 3, "int(0..)", Pike_sp-args, "Start must not be greater than the " "length of the string.\n"); if ((TYPEOF(Pike_sp[1-args]) == T_INT) || ((TYPEOF(Pike_sp[1-args]) == T_STRING) && (Pike_sp[1-args].u.string->len == 1))) { INT_TYPE val; if (TYPEOF(Pike_sp[1-args]) == T_INT) { val = Pike_sp[1-args].u.integer; } else { val = index_shared_string(Pike_sp[1-args].u.string, 0); } if( !string_range_contains( haystack, val ) ) { pop_n_elems(args); push_int( -1 ); return; } switch(Pike_sp[-args].u.string->size_shift) { case 0: { p_wchar0 *str = STR0(haystack); if (val >= 256) { start = -1; break; } while (start < haystack->len) { if (str[start] == val) break; start++; } } break; case 1: { p_wchar1 *str = STR1(haystack); if (val >= 65536) { start = -1; break; } while (start < haystack->len) { if (str[start] == val) break; start++; } } break; case 2: { p_wchar2 *str = STR2(haystack); while (start < haystack->len) { if (str[start] == (p_wchar2)val) break; start++; } } break; #ifdef PIKE_DEBUG default: Pike_fatal("search(): Unsupported string shift: %d!\n", haystack->size_shift); break; #endif } if (start >= haystack->len) { start = -1; } } else if(TYPEOF(Pike_sp[1-args]) == T_STRING) { /* Handle searching for the empty string. */ if (Pike_sp[1-args].u.string->len) { start = string_search(haystack, Pike_sp[1-args].u.string, start); } } else { SIMPLE_BAD_ARG_ERROR("search", 2, "string | int"); } pop_n_elems(args); push_int64(start); break; } case T_ARRAY: start=0; if(args > 2) { if(TYPEOF(Pike_sp[2-args]) != T_INT) SIMPLE_BAD_ARG_ERROR("search", 3, "int"); start=Pike_sp[2-args].u.integer; if(start<0) { bad_arg_error("search", Pike_sp-args, args, 3, "int(0..)", Pike_sp+2-args, "Start must be greater or equal to zero.\n"); } } start=array_search(Pike_sp[-args].u.array,Pike_sp+1-args,start); pop_n_elems(args); push_int64(start); break; case T_MAPPING: if(args > 2) { mapping_search_no_free(Pike_sp,Pike_sp[-args].u.mapping,Pike_sp+1-args,Pike_sp+2-args); } else { mapping_search_no_free(Pike_sp,Pike_sp[-args].u.mapping,Pike_sp+1-args,0); } free_svalue(Pike_sp-args); Pike_sp[-args]=*Pike_sp; dmalloc_touch_svalue(Pike_sp); pop_n_elems(args-1); return; case T_OBJECT: { struct program *p; if ((p = (Pike_sp[-args].u.object->prog))) { struct object *o = Pike_sp[-args].u.object; int id_level = p->inherits[SUBTYPEOF(Pike_sp[-args])].identifier_level; int id; int next, ind; p = p->inherits[SUBTYPEOF(Pike_sp[-args])].prog; /* NOTE: Fake lfun! */ id = low_find_lfun(p, LFUN__SEARCH); /* First try lfun::_search(). */ if (id >= 0) { apply_low(o, id + id_level, args-1); stack_pop_n_elems_keep_top(1); return; } /* Check if we have an iterator. */ if (((id = find_identifier("value", p)) >= 0) && ((next = find_identifier("next", p)) >= 0) && ((ind = find_identifier("index", p)) >= 0)) { /* We have an iterator. */ id += id_level; next += id_level; ind += id_level; /* Set the start position if needed. */ if (args > 2) { int fun = find_identifier("set_index", p); if (fun < 0) Pike_error ("Cannot call unknown function \"%s\".\n", fun); apply_low(o, fun + id_level, args-2); pop_stack(); } /* At this point we have two values on the stack. */ while(1) { apply_low(o, id, 0); if (is_eq(Pike_sp-2, Pike_sp-1)) { /* Found. */ apply_low(o, ind, 0); stack_pop_n_elems_keep_top(3); return; } apply_low(o, next, 0); if (UNSAFE_IS_ZERO(Pike_sp-1)) { /* Not found. */ pop_n_elems(4); /* FIXME: Should probably indicate not found in some other way. * On the other hand, the iterator should be false now. */ push_undefined(); return; } pop_n_elems(2); } } } } /* FALL_THROUGH */ default: SIMPLE_BAD_ARG_ERROR("search", 1, "string|array|mapping|object"); } } /*! @decl int has_prefix(string|object s, string prefix) *! *! Returns @expr{1@} if the string @[s] starts with @[prefix], *! returns @expr{0@} (zero) otherwise. *! *! When @[s] is an object, it needs to implement *! @[lfun::_sizeof()] and @[lfun::`[]]. *! *! @seealso *! @[has_suffix()], @[has_value()], @[search()] */ PMOD_EXPORT void f_has_prefix(INT32 args) { struct pike_string *a, *b; if(args<2) SIMPLE_TOO_FEW_ARGS_ERROR("has_prefix", 2); if((TYPEOF(Pike_sp[-args]) != T_STRING) && (TYPEOF(Pike_sp[-args]) != T_OBJECT)) SIMPLE_ARG_TYPE_ERROR("has_prefix", 1, "string|object"); if(TYPEOF(Pike_sp[1-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("has_prefix", 2, "string"); b = Pike_sp[1-args].u.string; if (TYPEOF(Pike_sp[-args]) == T_OBJECT) { ptrdiff_t i; struct object *o = Pike_sp[-args].u.object; int inherit_no = SUBTYPEOF(Pike_sp[-args]); if (!o->prog || FIND_LFUN(o->prog, LFUN__SIZEOF) < 0) { Pike_error("has_prefix(): Object in argument 1 lacks lfun::_sizeof().\n"); } apply_lfun(o, LFUN__SIZEOF, 0); if ((TYPEOF(Pike_sp[-1]) != T_INT) || (Pike_sp[-1].u.integer < b->len)) { pop_n_elems(args + 1); push_int(0); return; } for (i = 0; i < b->len; i++) { p_wchar2 ch = index_shared_string(b, i); Pike_sp[-1].u.integer = i; /* Note: Integers do not need to be freed. */ object_index_no_free(Pike_sp-1, o, inherit_no, Pike_sp-1); if (TYPEOF(Pike_sp[-1]) != PIKE_T_INT) { Pike_error("Unexepected value returned from index operator.\n"); } if (ch != Pike_sp[-1].u.integer) { pop_n_elems(args + 1); push_int(0); return; } } pop_n_elems(args+1); push_int(1); return; } a = Pike_sp[-args].u.string; /* First handle some common special cases. */ if ((b->len > a->len) || (b->size_shift > a->size_shift) || !string_range_contains_string(a, b)) { pop_n_elems(args); push_int(0); return; } /* Trivial cases. */ if ((a == b)||(!b->len)) { pop_n_elems(args); push_int(1); return; } if (a->size_shift == b->size_shift) { int res = !MEMCMP(a->str, b->str, b->len << b->size_shift); pop_n_elems(args); push_int(res); return; } /* At this point a->size_shift > b->size_shift */ #define TWO_SHIFTS(S1, S2) ((S1)|((S2)<<2)) switch(TWO_SHIFTS(a->size_shift, b->size_shift)) { #define CASE_SHIFT(S1, S2) \ case TWO_SHIFTS(S1, S2): \ { \ PIKE_CONCAT(p_wchar,S1) *s1 = PIKE_CONCAT(STR,S1)(a); \ PIKE_CONCAT(p_wchar,S2) *s2 = PIKE_CONCAT(STR,S2)(b); \ ptrdiff_t len = b->len; \ while(len-- && (s1[len] == s2[len])) \ ; \ pop_n_elems(args); \ push_int(len == -1); \ return; \ } \ break CASE_SHIFT(1,0); CASE_SHIFT(2,0); CASE_SHIFT(2,1); default: Pike_error("has_prefix(): Unexpected string shift combination: a:%d, b:%d!\n", a->size_shift, b->size_shift); break; } #undef CASE_SHIFT #undef TWO_SHIFTS } /*! @decl int has_suffix(string s, string suffix) *! *! Returns @expr{1@} if the string @[s] ends with @[suffix], *! returns @expr{0@} (zero) otherwise. *! *! @seealso *! @[has_prefix()], @[has_value()], @[search()] */ PMOD_EXPORT void f_has_suffix(INT32 args) { struct pike_string *a, *b; if(args<2) SIMPLE_TOO_FEW_ARGS_ERROR("has_suffix", 2); if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("has_suffix", 1, "string"); if(TYPEOF(Pike_sp[1-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("has_suffix", 2, "string"); a = Pike_sp[-args].u.string; b = Pike_sp[1-args].u.string; /* First handle some common special cases. */ if ((b->len > a->len) || (b->size_shift > a->size_shift) || !string_range_contains_string(a, b)) { pop_n_elems(args); push_int(0); return; } /* Trivial cases. */ if ((a == b)||(!b->len)) { pop_n_elems(args); push_int(1); return; } if (a->size_shift == b->size_shift) { int res = !MEMCMP(a->str + ((a->len - b->len)<<b->size_shift), b->str, b->len << b->size_shift); pop_n_elems(args); push_int(res); return; } /* At this point a->size_shift > b->size_shift */ #define TWO_SHIFTS(S1, S2) ((S1)|((S2)<<2)) switch(TWO_SHIFTS(a->size_shift, b->size_shift)) { #define CASE_SHIFT(S1, S2) \ case TWO_SHIFTS(S1, S2): \ { \ PIKE_CONCAT(p_wchar,S1) *s1 = PIKE_CONCAT(STR,S1)(a) + a->len - b->len; \ PIKE_CONCAT(p_wchar,S2) *s2 = PIKE_CONCAT(STR,S2)(b); \ ptrdiff_t len = b->len; \ while(len-- && (s1[len] == s2[len])) \ ; \ pop_n_elems(args); \ push_int(len == -1); \ return; \ } \ break CASE_SHIFT(1,0); CASE_SHIFT(2,0); CASE_SHIFT(2,1); default: Pike_error("has_prefix(): Unexpected string shift combination: a:%d, b:%d!\n", a->size_shift, b->size_shift); break; } #undef CASE_SHIFT #undef TWO_SHIFTS } /*! @decl int has_index(string haystack, int index) *! @decl int has_index(array haystack, int index) *! @decl int has_index(mapping|multiset|object|program haystack, mixed index) *! *! Search for @[index] in @[haystack]. *! *! @returns *! Returns @expr{1@} if @[index] is in the index domain of @[haystack], *! or @expr{0@} (zero) if not found. *! *! This function is equivalent to (but sometimes faster than): *! *! @code *! search(indices(haystack), index) != -1 *! @endcode *! *! @note *! A negative index in strings and arrays as recognized by the *! index operators @expr{`[]()@} and @expr{`[]=()@} is not considered *! a proper index by @[has_index()] *! *! @seealso *! @[has_value()], @[has_prefix()], @[has_suffix()], @[indices()], *! @[search()], @[values()], @[zero_type()] */ PMOD_EXPORT void f_has_index(INT32 args) { int t = 0; if(args < 2) SIMPLE_TOO_FEW_ARGS_ERROR("has_index", 2); if(args > 2) pop_n_elems(args-2); switch(TYPEOF(Pike_sp[-2])) { case T_STRING: if(TYPEOF(Pike_sp[-1]) == T_INT) t = (0 <= Pike_sp[-1].u.integer && Pike_sp[-1].u.integer < Pike_sp[-2].u.string->len); pop_n_elems(args); push_int(t); break; case T_ARRAY: if(TYPEOF(Pike_sp[-1]) == T_INT) t = (0 <= Pike_sp[-1].u.integer && Pike_sp[-1].u.integer < Pike_sp[-2].u.array->size); pop_n_elems(args); push_int(t); break; case T_MULTISET: case T_MAPPING: f_index(2); f_zero_type(1); #ifdef PIKE_DEBUG if(TYPEOF(Pike_sp[-1]) != T_INT) PIKE_ERROR("has_index", "Function `zero_type' gave incorrect result.\n", Pike_sp, args); #endif Pike_sp[-1].u.integer = !Pike_sp[-1].u.integer; break; case T_OBJECT: case T_PROGRAM: /* FIXME: If the object behaves like an array, it will throw an error for non-valid indices. Therefore it's not a good idea to use the index operator. Maybe we should use object->_has_index(index) provided that the object implements it. /Noring */ /* If it is an iterator object we may want to use the iterator interface to look for the index. */ stack_swap(); f_indices(1); stack_swap(); f_search(2); if(TYPEOF(Pike_sp[-1]) == T_INT) Pike_sp[-1].u.integer = (Pike_sp[-1].u.integer != -1); else PIKE_ERROR("has_index", "Function `search' gave incorrect result.\n", Pike_sp, args); break; default: SIMPLE_ARG_TYPE_ERROR ("has_index", 1, "string|array|mapping|multiset|object|program"); } } /*! @decl int has_value(string haystack, string value) *! @decl int has_value(string haystack, int value) *! @decl int has_value(array|mapping|object|program haystack, mixed value) *! *! Search for @[value] in @[haystack]. *! *! @returns *! Returns @expr{1@} if @[value] is in the value domain of @[haystack], *! or @expr{0@} (zero) if not found. *! *! This function is in all cases except when both arguments are strings *! equivalent to (but sometimes faster than): *! *! @code *! search(values(@[haystack]), @[value]) != -1 *! @endcode *! *! If both arguments are strings, @[has_value()] is equivalent to: *! *! @code *! search(@[haystack], @[value]) != -1 *! @endcode *! *! @seealso *! @[has_index()], @[indices()], @[search()], @[has_prefix()], *! @[has_suffix()], @[values()], @[zero_type()] */ PMOD_EXPORT void f_has_value(INT32 args) { if(args < 2) SIMPLE_TOO_FEW_ARGS_ERROR("has_value", 2); if(args > 2) pop_n_elems(args-2); switch(TYPEOF(Pike_sp[-2])) { case T_MAPPING: f_search(2); f_zero_type(1); if(TYPEOF(Pike_sp[-1]) == T_INT) Pike_sp[-1].u.integer = !Pike_sp[-1].u.integer; else PIKE_ERROR("has_value", "Function `zero_type' gave incorrect result.\n", Pike_sp, args); break; case T_PROGRAM: case T_OBJECT: /* FIXME: It's very sad that we always have to do linear search with `values' in case of objects. The problem is that we cannot use `search' directly since it's undefined whether it returns -1 (array) or 0 (mapping) during e.g. some data type emulation. Maybe we should use object->_has_value(value) provided that the object implements it. /Noring */ /* FALL_THROUGH */ case T_MULTISET: /* FIXME: This behavior for multisets isn't clean. It should be * compat only. */ stack_swap(); f_values(1); stack_swap(); /* FALL_THROUGH */ case T_STRING: /* Strings are odd. /Noring */ case T_ARRAY: f_search(2); if(TYPEOF(Pike_sp[-1]) == T_INT) Pike_sp[-1].u.integer = (Pike_sp[-1].u.integer != -1); else PIKE_ERROR("has_value", "Search gave incorrect result.\n", Pike_sp, args); break; default: SIMPLE_ARG_TYPE_ERROR ("has_value", 1, "string|array|mapping|object|program"); } } /*! @decl void add_constant(string name, mixed value) *! @decl void add_constant(string name) *! *! Add a new predefined constant. *! *! This function is often used to add builtin functions. *! All programs compiled after the @[add_constant()] function has been *! called can access @[value] by the name @[name]. *! *! If there is a constant called @[name] already, it will be replaced by *! by the new definition. This will not affect already compiled programs. *! *! Calling @[add_constant()] without a value will remove that name from *! the list of constants. As with replacing, this will not affect already *! compiled programs. *! *! @seealso *! @[all_constants()] */ PMOD_EXPORT void f_add_constant(INT32 args) { ASSERT_SECURITY_ROOT("add_constant"); if(args<1) SIMPLE_TOO_FEW_ARGS_ERROR("add_constant", 1); if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_BAD_ARG_ERROR("add_constant", 1, "string"); if(args>1) { dmalloc_touch_svalue(Pike_sp-args+1); low_add_efun(Pike_sp[-args].u.string, Pike_sp-args+1); }else{ low_add_efun(Pike_sp[-args].u.string, 0); } pop_n_elems(args); } /*! @decl string combine_path(string path, string ... paths) *! @decl string combine_path_unix(string path, string ... paths) *! @decl string combine_path_nt(string path, string ... paths) *! @decl string combine_path_amigaos(string path, string ... paths) *! *! Concatenate a number of paths to a straightforward path without *! any @expr{"//"@}, @expr{"/.."@} or @expr{"/."@}. If any path *! argument is absolute then the result is absolute and the *! preceding arguments are ignored. If the result is relative then *! it might have leading @expr{".."@} components. If the last *! nonempty argument ends with a directory separator then the *! result ends with that too. If all components in a relative path *! disappear due to subsequent @expr{".."@} components then the *! result is @expr{"."@}. *! *! @[combine_path_unix()] concatenates in UNIX style, which also is *! appropriate for e.g. URL:s ("/" separates path components and *! absolute paths start with "/"). @[combine_path_nt()] *! concatenates according to NT filesystem conventions ("/" and "\" *! separates path components and there might be a drive letter in *! front of absolute paths). @[combine_path_amigaos()] concatenates *! according to AmigaOS filesystem conventions. *! *! @[combine_path()] is equivalent to @[combine_path_unix()] on UNIX-like *! operating systems, and equivalent to @[combine_path_nt()] on NT-like *! operating systems, and equivalent to @[combine_path_amigaos()] on *! AmigaOS-like operating systems. *! *! @seealso *! @[getcwd()], @[Stdio.append_path()] */ #define NT_COMBINE_PATH #include "combine_path.h" #define UNIX_COMBINE_PATH #include "combine_path.h" #define AMIGAOS_COMBINE_PATH #include "combine_path.h" /*! @decl int zero_type(mixed a) *! *! Return the type of zero. *! *! There are many types of zeros out there, or at least there are two. *! One is returned by normal functions, and one returned by mapping *! lookups and @[find_call_out()] when what you looked for wasn't there. *! The only way to separate these two kinds of zeros is @[zero_type()]. *! *! @returns *! When doing a @[find_call_out()] or mapping lookup, @[zero_type()] on *! this value will return @expr{1@} if there was no such thing present in *! the mapping, or if no such @tt{call_out@} could be found. *! *! If the argument to @[zero_type()] is a destructed object or a function *! in a destructed object, @expr{2@} will be returned. *! *! In all other cases @[zero_type()] will return @expr{0@} (zero). *! *! @seealso *! @[find_call_out()] */ PMOD_EXPORT void f_zero_type(INT32 args) { if(args < 1) SIMPLE_TOO_FEW_ARGS_ERROR("zero_type",1); if((TYPEOF(Pike_sp[-args]) == T_OBJECT || TYPEOF(Pike_sp[-args]) == T_FUNCTION) && !Pike_sp[-args].u.object->prog) { pop_n_elems(args); push_int(NUMBER_DESTRUCTED); } else if(TYPEOF(Pike_sp[-args]) != T_INT) { pop_n_elems(args); push_int(0); } else { pop_n_elems(args-1); Pike_sp[-1].u.integer = SUBTYPEOF(Pike_sp[-1]); SET_SVAL_SUBTYPE(Pike_sp[-1], NUMBER_NUMBER); } } static int generate_zero_type(node *n) { struct compilation *c = THIS_COMPILATION; CHECK_COMPILER(); if(count_args(CDR(n)) != 1) return 0; if(do_docode(CDR(n),DO_NOT_COPY) != 1) Pike_fatal("Count args was wrong in generate_zero_type().\n"); emit0(F_ZERO_TYPE); return 1; } /* * Some wide-strings related functions */ /*! @decl string(0..255) string_to_unicode(string s) *! *! Converts a string into an UTF16 compliant byte-stream. *! *! @note *! Throws an error if characters not legal in an UTF16 stream are *! encountered. Valid characters are in the range 0x00000 - 0x10ffff, *! except for characters 0xfffe and 0xffff. *! *! Characters in range 0x010000 - 0x10ffff are encoded using surrogates. *! *! @seealso *! @[Charset.decoder()], @[string_to_utf8()], @[unicode_to_string()], *! @[utf8_to_string()] */ PMOD_EXPORT void f_string_to_unicode(INT32 args) { struct pike_string *in; struct pike_string *out = NULL; ptrdiff_t len; ptrdiff_t i; get_all_args("string_to_unicode", args, "%W", &in); switch(in->size_shift) { case 0: /* Just 8bit characters */ len = in->len * 2; out = begin_shared_string(len); if (len) { MEMSET(out->str, 0, len); /* Clear the upper (and lower) byte */ #ifdef PIKE_DEBUG if (d_flag) { for(i = len; i--;) { if (out->str[i]) { Pike_fatal("MEMSET didn't clear byte %ld of %ld\n", PTRDIFF_T_TO_LONG(i+1), PTRDIFF_T_TO_LONG(len)); } } } #endif /* PIKE_DEBUG */ for(i = in->len; i--;) { out->str[i * 2 + 1] = in->str[i]; } } out = end_shared_string(out); break; case 1: /* 16 bit characters */ /* FIXME: Should we check for 0xfffe & 0xffff here too? */ len = in->len * 2; out = begin_shared_string(len); #if (PIKE_BYTEORDER == 4321) /* Big endian -- We don't need to do much... * * FIXME: Future optimization: Check if refcount is == 1, * and perform sufficient magic to be able to convert in place. */ MEMCPY(out->str, in->str, len); #else /* Other endianness, may need to do byte-order conversion also. */ { p_wchar1 *str1 = STR1(in); for(i = in->len; i--;) { unsigned INT32 c = str1[i]; out->str[i * 2 + 1] = c & 0xff; out->str[i * 2] = c >> 8; } } #endif out = end_shared_string(out); break; case 2: /* 32 bit characters -- Is someone writing in Klingon? */ { p_wchar2 *str2 = STR2(in); ptrdiff_t j; len = in->len * 2; /* Check how many extra wide characters there are. */ for(i = in->len; i--;) { if (str2[i] > 0xfffd) { if (str2[i] < 0x10000) { /* 0xfffe: Byte-order detection illegal character. * 0xffff: Illegal character. */ Pike_error("string_to_unicode(): Illegal character 0x%04x (index %ld) " "is not a Unicode character.", str2[i], PTRDIFF_T_TO_LONG(i)); } if (str2[i] > 0x10ffff) { Pike_error("string_to_unicode(): Character 0x%08x (index %ld) " "is out of range (0x00000000..0x0010ffff).", str2[i], PTRDIFF_T_TO_LONG(i)); } /* Extra wide characters take two unicode characters in space. * ie One unicode character extra. */ len += 2; } } out = begin_shared_string(len); j = len; for(i = in->len; i--;) { unsigned INT32 c = str2[i]; j -= 2; if (c > 0xffff) { /* Use surrogates */ c -= 0x10000; out->str[j + 1] = c & 0xff; out->str[j] = 0xdc | ((c >> 8) & 0x03); j -= 2; c >>= 10; c |= 0xd800; } out->str[j + 1] = c & 0xff; out->str[j] = c >> 8; } #ifdef PIKE_DEBUG if (j) { Pike_fatal("string_to_unicode(): Indexing error: len:%ld, j:%ld.\n", PTRDIFF_T_TO_LONG(len), PTRDIFF_T_TO_LONG(j)); } #endif /* PIKE_DEBUG */ out = end_shared_string(out); } break; #ifdef PIKE_DEBUG default: Pike_fatal("string_to_unicode(): Bad string shift: %d!\n", in->size_shift); break; #endif } pop_n_elems(args); push_string(out); } /*! @decl string unicode_to_string(string(0..255) s) *! *! Converts an UTF16 byte-stream into a string. *! *! @note *! This function did not decode surrogates in Pike 7.2 and earlier. *! *! @seealso *! @[Charset.decoder()], @[string_to_unicode()], @[string_to_utf8()], *! @[utf8_to_string()] */ PMOD_EXPORT void f_unicode_to_string(INT32 args) { struct pike_string *in; struct pike_string *out = NULL; ptrdiff_t len, i, num_surrogates = 0; int swab=0; p_wchar1 surr1, surr2, surrmask, *str0; get_all_args("unicode_to_string", args, "%S", &in); if (in->len & 1) { bad_arg_error("unicode_to_string", Pike_sp-args, args, 1, "string", Pike_sp-args, "String length is odd.\n"); } /* Check byteorder of UTF data */ str0 = (p_wchar1 *)in->str; len = in->len; if (len && (str0[0] == 0xfeff)) { /* Correct byte order mark. No swap necessary. */ swab = 0; str0 ++; len -= 2; } else if (len && (str0[0] == 0xfffe)) { /* Reversed byte order mark. Need to swap. */ swab = 1; str0 ++; len -= 2; } else { /* No byte order mark. Need to swap unless big endian */ #if (PIKE_BYTEORDER == 4321) swab = 0; #else swab = 1; #endif /* PIKE_BYTEORDER == 4321 */ } /* Indentify surrogates by pre-swapped bitmasks, for efficiency */ if (swab) { surr1 = 0xd8; surr2 = 0xdc; surrmask = 0xfc; } else { surr1 = 0xd800; surr2 = 0xdc00; surrmask = 0xfc00; } /* Count number of surrogates */ for (i = len; i >= 4; i -= 2, str0++) if ( (str0[0]&surrmask) == surr1 && (str0[1]&surrmask) == surr2 ) num_surrogates ++; /* Move str0 past the last word */ str0++; len = len / 2 - num_surrogates; out = begin_wide_shared_string(len, (num_surrogates? 2 : 1)); if (!swab) { /* Native endian */ if (num_surrogates) { /* Convert surrogates */ p_wchar2 *str2 = STR2(out); for (i = len; i--; --str0) if ((str0[-1]&surrmask) == surr2 && num_surrogates && (str0[-2]&surrmask) == surr1) { str2[i] = ((str0[-2]&0x3ff)<<10) + (str0[-1]&0x3ff) + 0x10000; --str0; --num_surrogates; } else str2[i] = str0[-1]; } else /* * FIXME: Future optimization: Perform sufficient magic * to do the conversion in place if the ref-count is == 1. */ MEMCPY(out->str, (char *)(str0-len), len*2); } else { /* Reverse endian */ if (num_surrogates) { /* Convert surrogates */ p_wchar2 *str2 = STR2(out); for (i = len; i--; --str0) { if ((str0[-1]&surrmask) == surr2 && num_surrogates && (str0[-2]&surrmask) == surr1) { #if (PIKE_BYTEORDER == 4321) str2[i] = ((((unsigned char *)str0)[-3]&3)<<18) + (((unsigned char *)str0)[-4]<<10) + ((((unsigned char *)str0)[-1]&3)<<8) + ((unsigned char *)str0)[-2] + 0x10000; #else /* PIKE_BYTEORDER != 4321 */ str2[i] = ((((unsigned char *)str0)[-4]&3)<<18) + (((unsigned char *)str0)[-3]<<10) + ((((unsigned char *)str0)[-2]&3)<<8) + ((unsigned char *)str0)[-1] + 0x10000; #endif /* PIKE_BYTEORDER == 4321 */ --str0; --num_surrogates; } else { #if (PIKE_BYTEORDER == 4321) str2[i] = (((unsigned char *)str0)[-1]<<8) + ((unsigned char *)str0)[-2]; #else /* PIKE_BYTEORDER != 4321 */ str2[i] = (((unsigned char *)str0)[-2]<<8) + ((unsigned char *)str0)[-1]; #endif /* PIKE_BYTEORDER == 4321 */ } } } else { /* No surrogates */ p_wchar1 *str1 = STR1(out); for (i = len; i--; --str0) { #if (PIKE_BYTEORDER == 4321) str1[i] = (((unsigned char *)str0)[-1]<<8) + ((unsigned char *)str0)[-2]; #else /* PIKE_BYTEORDER != 4321 */ str1[i] = (((unsigned char *)str0)[-2]<<8) + ((unsigned char *)str0)[-1]; #endif /* PIKE_BYTEORDER == 4321 */ } } } out = end_shared_string(out); pop_n_elems(args); push_string(out); } /*! @decl string(1..) string_filter_non_unicode(string s) *! *! Replace the most obviously non-unicode characters from @[s] with *! the unicode replacement character. *! *! @note *! This will replace characters outside the ranges *! @expr{0x00000000-0x0000d7ff@} and @expr{0x0000e000-0x0010ffff@} *! with 0xffea (the replacement character). *! *! @seealso *! @[Charset.encoder()], @[string_to_unicode()], *! @[unicode_to_string()], @[utf8_to_string()], @[string_to_utf8()] */ static void f_string_filter_non_unicode( INT32 args ) { struct pike_string *in; INT32 min,max; int i; static const p_wchar1 replace = 0xfffd; static const PCHARP repl_char = {(void*)&replace,1}; get_all_args("filter_non_unicode", args, "%W", &in); check_string_range( in, 1, &min, &max ); if( !in->len || (min >= 0 && max < 0xd800) ) return; /* The string is obviously ok. */ if( (max < 0 || min > 0x10ffff) || (max < 0xe000 && min > 0xd7ff) ) { /* All invalid. Could probably be optimized. */ debug_make_shared_binary_pcharp( repl_char, 1 ); push_int( in->len ); o_multiply(); } else { /* Note: we could optimize this by not doing any string builder * at all unless there is at least one character that needs to * be replaced. */ struct string_builder out; /* on average shift 1 is more correct than in->size_shift, since * there is usually only the one character that is outside the * range. */ init_string_builder_alloc( &out, in->len, 1 ); for( i=0; i<in->len; i++ ) { p_wchar2 c = index_shared_string(in,i); if( (c < 0 || c > 0x10ffff) || (c>0xd7ff && c<0xe000) ) string_builder_append( &out, repl_char, 1 ); else string_builder_putchar( &out, c ); } push_string( finish_string_builder( &out ) ); } } /*! @decl string(0..255) string_to_utf8(string s) *! @decl string(0..255) string_to_utf8(string s, int extended) *! *! Converts a string into an UTF-8 compliant byte-stream. *! *! @note *! Throws an error if characters not valid in an UTF-8 stream are *! encountered. Valid characters are in the ranges *! @expr{0x00000000-0x0000d7ff@} and @expr{0x0000e000-0x0010ffff@}. *! *! If @[extended] is 1 then characters outside the valid ranges are *! accepted too and encoded using the same algorithm. Such encoded *! characters are however not UTF-8 compliant. *! *! @seealso *! @[Charset.encoder()], @[string_to_unicode()], *! @[unicode_to_string()], @[utf8_to_string()] */ PMOD_EXPORT void f_string_to_utf8(INT32 args) { ptrdiff_t len; struct pike_string *in;

pike.git/ src/ builtin_functions.c > 8fa8b4880055e55db1b042e32533e636eb82d811 [Annotate]