pike.git/src/pike_types.c:77edda3605d2e7a379370369e32edfe453f8e36e

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9222 9223 /* || 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 <ctype.h> #include "svalue.h" #include "stralloc.h" #include "pike_types.h" #include "stuff.h" #include "array.h" #include "program.h" #include "constants.h" #include "object.h" #include "multiset.h" #include "mapping.h" #include "pike_macros.h" #include "pike_error.h" #include "las.h" #include "lex.h" #include "pike_memory.h" #include "bignum.h" #include "main.h" #include "opcodes.h" #include "cyclic.h" #include "gc.h" #include "pike_compiler.h" #include "block_allocator.h" #include "bitvector.h" #ifdef PIKE_DEBUG #define PIKE_TYPE_DEBUG #endif /* PIKE_DEBUG */ /* * Flags used by low_match_types(). */ #define A_EXACT 1 #define B_EXACT 2 #define NO_MAX_ARGS 4 #define NO_SHORTCUTS 8 #define TYPE_GROUPING /* * Flags used by pike_types_le() */ #define LE_WEAK_OBJECTS 1 /* Perform weaker checking of objects. */ #define LE_A_B_SWAPPED 2 /* Argument A and B have been swapped. * Relevant for markers. */ #ifdef TYPE_GROUPING #define LE_A_GROUPED 4 /* Argument A has been grouped. * Perform weaker checking for OR-nodes. */ #define LE_B_GROUPED 8 /* Argument B has been grouped. * Perform weaker checking for OR-nodes. */ #define LE_A_B_GROUPED 12 /* Both the above two flags. */ #endif #define LE_USE_HANDLERS 16 /* Call handlers if appropriate. */ #define LE_EXPLICIT_ZERO 32 /* Zero is not subtype of all others. */ #define LE_STRICT_FUN 64 /* Require all arguments to functions. */ /* * Flags used by low_get_first_arg_type() * * Note that these differ for the flags to get_first_arg_type(). */ #define FILTER_KEEP_VOID 1 /* Keep void during the filtering. */ /* * Flags used as flag_method to mk_type() */ #define PT_COPY_CAR 1 #define PT_COPY_CDR 2 #define PT_COPY_BOTH 3 #define PT_IS_MARKER 4 /* The node is a marker. */ /* Number of entries in the struct pike_type hash-table. */ #define PIKE_TYPE_HASH_SIZE 65535 #ifdef PIKE_TYPE_DEBUG static int indent=0; #endif int max_correct_args; PMOD_EXPORT struct pike_type *string0_type_string; PMOD_EXPORT struct pike_type *string_type_string; PMOD_EXPORT struct pike_type *int_type_string; PMOD_EXPORT struct pike_type *float_type_string; PMOD_EXPORT struct pike_type *function_type_string; PMOD_EXPORT struct pike_type *object_type_string; PMOD_EXPORT struct pike_type *program_type_string; PMOD_EXPORT struct pike_type *array_type_string; PMOD_EXPORT struct pike_type *multiset_type_string; PMOD_EXPORT struct pike_type *mapping_type_string; PMOD_EXPORT struct pike_type *type_type_string; PMOD_EXPORT struct pike_type *mixed_type_string; PMOD_EXPORT struct pike_type *void_type_string; PMOD_EXPORT struct pike_type *zero_type_string; PMOD_EXPORT struct pike_type *inheritable_type_string; PMOD_EXPORT struct pike_type *typeable_type_string; PMOD_EXPORT struct pike_type *enumerable_type_string; PMOD_EXPORT struct pike_type *any_type_string; PMOD_EXPORT struct pike_type *weak_type_string; /* array|mapping|multiset|function */ struct pike_type *sscanf_type_string; struct pike_type *sscanf_76_type_string; PMOD_EXPORT struct pike_string *literal_string_string; PMOD_EXPORT struct pike_string *literal_int_string; PMOD_EXPORT struct pike_string *literal_float_string; PMOD_EXPORT struct pike_string *literal_function_string; PMOD_EXPORT struct pike_string *literal_object_string; PMOD_EXPORT struct pike_string *literal_program_string; PMOD_EXPORT struct pike_string *literal_array_string; PMOD_EXPORT struct pike_string *literal_multiset_string; PMOD_EXPORT struct pike_string *literal_mapping_string; PMOD_EXPORT struct pike_string *literal_type_string; PMOD_EXPORT struct pike_string *literal_mixed_string; #ifdef DO_PIKE_CLEANUP struct pike_type_location *all_pike_type_locations = NULL; #endif /* DO_PIKE_CLEANUP */ static struct pike_type *a_markers[10], *b_markers[10]; static struct program *implements_a; static struct program *implements_b; static int implements_mode; #ifdef PIKE_DEBUG void TYPE_STACK_DEBUG(const char *UNUSED(fun)) { #if 0 fprintf(stderr, "%25s(): stack_depth:%ld mark_stack_depth:%ld\n", fun, (long)(Pike_compiler->type_stackp - type_stack), (long)(Pike_compiler->pike_type_mark_stackp - pike_type_mark_stack)); #endif /* 0 */ } #endif /* PIKE_DEBUG */ static void clear_markers(void) { unsigned int e; for(e=0;e<NELEM(a_markers);e++) { if(a_markers[e]) { free_type(a_markers[e]); a_markers[e]=0; } if(b_markers[e]) { free_type(b_markers[e]); b_markers[e]=0; } } } static void low_discard_type (void) { ptrdiff_t len = pop_stack_mark(); TYPE_STACK_DEBUG("discard_type"); for (;len > 0; len--) { /* Get rid of excess junk. */ free_type(*(Pike_compiler->type_stackp--)); } } void compiler_discard_type (void) { low_discard_type(); type_stack_mark(); } struct pike_type *debug_pop_type(void) { struct pike_type *t = pop_unfinished_type(); TYPE_STACK_DEBUG("pop_type"); type_stack_mark(); return t; } struct pike_type *debug_compiler_pop_type(void) { TYPE_STACK_DEBUG("compiler_pop_type"); if(Pike_compiler->num_parse_error) { struct pike_type *res; compiler_discard_type(); add_ref(res = any_type_string); return res; }else{ return debug_pop_type(); } } PMOD_EXPORT char *get_name_of_type(TYPE_T t) { switch(t) { case T_ARRAY: return "array"; case T_MAPPING: return "mapping"; case T_MULTISET: return "multiset"; case T_OBJECT: return "object"; case T_FUNCTION: return "function"; case T_PROGRAM: return "program"; case T_STRING: return "string"; case T_TYPE: return "type"; case T_INT: return "int"; case T_FLOAT: return "float"; case T_ZERO: return "zero"; case T_VOID: return "void"; case T_MIXED: return "mixed"; default: return "unknown"; #ifdef PIKE_DEBUG /* Let's make it able to describe any type constant in debug mode. */ case T_UNFINISHED: return "T_UNFINISHED"; case T_MANY: return "T_MANY"; case PIKE_T_INT_UNTYPED: return "PIKE_T_INT_UNTYPED"; case PIKE_T_GET_SET: return "PIKE_T_GET_SET"; case PIKE_T_FREE: return "PIKE_T_FREE"; case PIKE_T_ATTRIBUTE: return "PIKE_T_ATTRIBUTE"; case PIKE_T_NSTRING: return "PIKE_T_NSTRING"; case PIKE_T_RING: return "PIKE_T_RING"; case PIKE_T_NAME: return "PIKE_T_NAME"; case PIKE_T_SCOPE: return "PIKE_T_SCOPE"; case PIKE_T_TUPLE: return "PIKE_T_TUPLE"; case T_ASSIGN: return "T_ASSIGN"; case T_DELETED: return "T_DELETED"; case PIKE_T_UNKNOWN: return "PIKE_T_UNKNOWN"; case T_OBJ_INDEX: return "T_OBJ_INDEX"; case T_SVALUE_PTR: return "T_SVALUE_PTR"; case T_ARRAY_LVALUE: return "T_ARRAY_LVALUE"; case T_NOT: return "T_NOT"; case T_AND: return "T_AND"; case T_OR: return "T_OR"; case T_STORAGE: return "object storage"; case T_MAPPING_DATA: return "mapping_data"; case T_PIKE_FRAME: return "pike_frame"; case T_MULTISET_DATA: return "multiset_data"; case T_STRUCT_CALLABLE: return "callable"; #endif } } #define TWOT(X,Y) (((X) << 8)+(Y)) static int low_pike_types_le(struct pike_type *a, struct pike_type *b, int array_cnt, unsigned int flags); static int low_check_indexing(struct pike_type *type, struct pike_type *index_type, node *n); static void internal_parse_type(const char **s); /* * New and improved type representation system. * * This representation is new in Pike 7.3. * * Node: Car: Cdr: * --------------------------------------------- * SCOPE num vars (int) type * ASSIGN variable (int) type * NAME name (string) type * ATTRIBUTE name (string) type Added in 7.7. * FUNCTION type FUNCTION|MANY * MANY many type return type * RING type type Reserved. * TUPLE type type Reserved. * MAPPING index type value type * OR type (not OR) type * AND type type * ARRAY type - * MULTISET type - * NOT type - * '0'-'9' - - * FLOAT - - * STRING ZERO, INT or OR - Range added in 7.7 * TYPE type - * PROGRAM type - * MIXED - - * VOID - - * ZERO - - * UNKNOWN - - * INT min (int) max (int) * OBJECT implements/is object id(int) * * Note that the cdr of a FUNCTION is a valid FUNCTION for the rest of * the arguments. * * Note also that functions that don't take any arguments, or just * a many argument just have a MANY node, and no FUNCTION node. * */ static struct block_allocator type_allocator = BA_INIT(sizeof(struct pike_type), 128); PMOD_EXPORT void really_free_pike_type(struct pike_type * t) { ba_free(&type_allocator, t); } ATTRIBUTE((malloc)) PMOD_EXPORT struct pike_type * alloc_pike_type(void) { return ba_alloc(&type_allocator); } PMOD_EXPORT void count_memory_in_pike_types(size_t *n, size_t *s) { ba_count_all(&type_allocator, n, s); } struct pike_type **pike_type_hash = NULL; size_t pike_type_hash_size = 0; void debug_free_type(struct pike_type *t) { #ifdef DEBUG_MALLOC if (t == (struct pike_type *)(size_t)0x55555555) { Pike_fatal("Freeing dead type.\n"); } #endif /* DEBUG_MALLOC */ loop: if (!sub_ref(t)) { unsigned INT32 hash = t->hash & pike_type_hash_size; struct pike_type **t2 = pike_type_hash + hash; struct pike_type *car, *cdr; unsigned INT32 type; #ifdef PIKE_DEBUG /* PIKE_DEBUG code */ if (hash > pike_type_hash_size) { Pike_fatal("Modulo operation failed for hash:%u, index:%u, size:%u.\n", t->hash, hash, pike_type_hash_size); } /* End PIKE_DEBUG code */ #endif while (*t2) { if (*t2 == t) { *t2 = t->next; break; } t2 = &((*t2)->next); } car = t->car; cdr = t->cdr; type = t->type; really_free_pike_type((struct pike_type*)debug_malloc_pass(t)); /* FIXME: Recursion: Should we use a stack? */ switch(type) { case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: case PIKE_T_RING: /* Free car & cdr */ free_type(car); t = (struct pike_type *) cdr; debug_free_type_preamble (t); goto loop; case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: case T_STRING: /* Free car */ t = (struct pike_type *) car; debug_free_type_preamble (t); goto loop; case T_SCOPE: case T_ASSIGN: /* Free cdr */ t = (struct pike_type *) cdr; debug_free_type_preamble (t); goto loop; case PIKE_T_ATTRIBUTE: case PIKE_T_NAME: free_string((struct pike_string *)car); t = (struct pike_type *) cdr; debug_free_type_preamble (t); goto loop; #ifdef PIKE_DEBUG case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: case T_INT: case T_OBJECT: break; default: Pike_fatal("free_type(): Unhandled type-node: %d\n", type); break; #endif /* PIKE_DEBUG */ } } } static inline struct pike_type *debug_mk_type(unsigned INT32 type, struct pike_type *car, struct pike_type *cdr, int flag_method) { /* FIXME: The hash ought to be based on the tree contents, regardless * of what the adresses of the type nodes are. */ struct pike_type *t; unsigned INT32 index, hash = DO_NOT_WARN((unsigned INT32) ((ptrdiff_t)type*0x10204081)^ (0x8003*PTR_TO_INT(car))^ ~(0x10001*PTR_TO_INT(cdr))); hash ^= (hash >> 20) ^ (hash >> 12); hash ^= (hash >> 7) ^ (hash >> 4); index = hash & pike_type_hash_size; #ifdef PIKE_EXTRA_DEBUG static unsigned INT32 extra_debug_index = (unsigned INT32)~0; #endif /* PIKE_EXTRA_DEBUG */ #ifdef PIKE_DEBUG /* PIKE_DEBUG code */ if (type & ~255) { /* The bad type node on OSF/1 seems to be: * * type: 0xffff * car: valid pointer. * cdr: 0x400000000 * next: 0x100000000 */ Pike_fatal("Attempt to create an invalid type node: %d(%s)\n" " car: %p\n" " cdr: %p\n", type, get_name_of_type(type), car, cdr); } if (index > pike_type_hash_size) { Pike_fatal("Modulo operation failed for hash:%u, index:%u, " "size:%"PRINTSIZET"d.\n", hash, index, pike_type_hash_size); } /* End PIKE_DEBUG code */ #endif #ifdef PIKE_EXTRA_DEBUG if ((!~extra_debug_index) && (type == T_FUNCTION) && (car->type == T_STRING) && (cdr->type == T_FUNCTION) && (cdr->car->type == T_STRING) && (cdr->cdr->type == T_MANY) && (cdr->cdr->car->type == T_VOID) && (cdr->cdr->cdr->type == T_STRING)) { /* Attempt to detect why we get a core-dump on OSF/1 * when loading Unicode.so from test_resolv. * * The problem triggs when the type for normalize() is created. * function(string,string:string) * /grubba 2005-02-04 * * Load order: * Module Hashtable status Note * Nettle.so OK * ___Oracle.so - load_module() fails. * Image.so - loads ok. * Unicode.so FAIL * * pike_type node: * Field Before After * t 1404b5020 1404b5020 * t->type 4 (function) 65535 (unknown) * t->car 1404863f8 (1404863f8) 140557560 (1404863f8) * t->cdr 1404b43d8 (1404b43d8) 400000000 (1404b43d8) * t->next 0 100000000 * /grubba 2005-06-03 */ extra_debug_index = index; } #endif /* PIKE_EXTRA_DEBUG */ for(t = pike_type_hash[index]; t; t = t->next) { #ifdef PIKE_EXTRA_DEBUG if (index == extra_debug_index) { fprintf(stderr, " %s:%d:PIKE_EXTRA_DEBUG:\n" " t: %p\n", __FILE__, __LINE__, t); fprintf(stderr, " t->type:%d (%s)\n" " t->car: %p (%p)\n" " t->cdr: %p (%p)\n" " t->next:%p\n", t->type, get_name_of_type(t->type), t->car, car, t->cdr, cdr, t->next); } #endif /* PIKE_EXTRA_DEBUG */ if ((t->hash == hash) && (t->type == type) && (t->car == car) && (t->cdr == cdr)) { /* Free car & cdr as appropriate. */ switch(type) { case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: case PIKE_T_RING: /* Free car & cdr */ free_type((struct pike_type *)debug_malloc_pass(car)); free_type((struct pike_type *)debug_malloc_pass(cdr)); break; case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: case T_STRING: /* Free car */ free_type((struct pike_type *)debug_malloc_pass(car)); break; case T_SCOPE: case T_ASSIGN: /* Free cdr */ free_type((struct pike_type *)debug_malloc_pass(cdr)); break; case PIKE_T_ATTRIBUTE: case PIKE_T_NAME: free_string((struct pike_string *)debug_malloc_pass(car)); free_type((struct pike_type *)debug_malloc_pass(cdr)); break; #ifdef PIKE_DEBUG case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: case T_INT: case T_OBJECT: break; default: Pike_fatal("mk_type(): Unhandled type-node: %d\n", type); break; #endif /* PIKE_DEBUG */ } add_ref((struct pike_type *)debug_malloc_pass(t)); return t; } } #ifdef PIKE_DEBUG if ((type == T_OR) && (car->type == T_OR)) { Pike_fatal("Invalid CAR to OR node.\n"); } #endif debug_malloc_pass(t = ba_alloc(&type_allocator)); t->refs = 0; add_ref(t); /* For DMALLOC... */ t->type = type; t->flags = 0; t->car = car; t->cdr = cdr; t->hash = hash; t->next = pike_type_hash[index]; pike_type_hash[index] = t; if (flag_method) { if (flag_method == PT_IS_MARKER) { t->flags = PT_FLAG_MARKER_0 << (type-'0'); } else if (type == PIKE_T_SCOPE) { /* The scope blocks propagation of markers. */ t->flags = cdr->flags & ~(PT_FLAG_MARKER|PT_FLAG_ASSIGN); } else { if (car && (flag_method & PT_COPY_CAR)) { t->flags |= car->flags; } if (cdr && (flag_method & PT_COPY_CDR)) { t->flags |= cdr->flags; } } } #ifdef DEBUG_MALLOC switch(type) { case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: case PIKE_T_RING: debug_malloc_pass(car); debug_malloc_pass(cdr); break; case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: case T_STRING: debug_malloc_pass(car); break; case T_ASSIGN: t->flags |= PT_FLAG_ASSIGN_0 << PTR_TO_INT(car); /* FALL_THROUGH */ case T_SCOPE: debug_malloc_pass(cdr); break; case PIKE_T_ATTRIBUTE: case PIKE_T_NAME: debug_malloc_pass(car); debug_malloc_pass(cdr); break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: case T_INT: case T_OBJECT: break; default: Pike_fatal("mk_type(): Unhandled type-node: %d\n", type); break; } #else /* !DEBUG_MALLOC */ if (type == T_ASSIGN) { t->flags |= PT_FLAG_ASSIGN_0 << PTR_TO_INT(car); } #endif /* DEBUG_MALLOC */ return t; } #ifdef DEBUG_MALLOC #define mk_type(T,CAR,CDR,FLAG) ((struct pike_type *)debug_malloc_pass(debug_mk_type(T,CAR,CDR,FLAG))) #else /* !DEBUG_MALLOC */ #define mk_type debug_mk_type #endif /* DEBUG_MALLOC */ #ifdef PIKE_DEBUG void debug_check_type_string(struct pike_type *s) { /* FIXME: Add verification code here */ } #endif /* PIKE_DEBUG */ struct pike_type **type_stack; struct pike_type ***pike_type_mark_stack; ptrdiff_t pop_stack_mark(void) { Pike_compiler->pike_type_mark_stackp--; if(Pike_compiler->pike_type_mark_stackp<pike_type_mark_stack) Pike_fatal("Type mark stack underflow\n"); TYPE_STACK_DEBUG("pop_stack_mark"); return Pike_compiler->type_stackp - *Pike_compiler->pike_type_mark_stackp; } void type_stack_pop_to_mark(void) { pop_stack_mark(); while(Pike_compiler->type_stackp > *Pike_compiler->pike_type_mark_stackp) { free_type(*(Pike_compiler->type_stackp--)); } TYPE_STACK_DEBUG("type_stack_pop_to_mark"); } struct pike_type *debug_peek_type_stack(void) { return *(Pike_compiler->type_stackp); } void debug_push_int_type(INT_TYPE min, INT_TYPE max) { #if SIZEOF_INT_TYPE > 4 /* a bit kludgy: should maybe really allow 64 bit INT_TYPE */ /* see also extract_type_int */ if (min<MIN_INT32) min=MIN_INT32; else if (min>MAX_INT32) min=MAX_INT32; if (max<MIN_INT32) max=MIN_INT32; else if (max>MAX_INT32) max=MAX_INT32; #endif #ifdef PIKE_DEBUG /* FIXME: Kludge to support 2^32-1 */ if (((min>0 && max>0) || (min<0 && max<0)) && min > max) Pike_fatal("push_int_type(): Bad integer range:" " min:%"PRINTPIKEINT"d, max:%"PRINTPIKEINT"d.\n", min, max); #endif /* PIKE_DEBUG */ if (!min && !max) { /* Special case... */ push_type(T_ZERO); } else { *(++Pike_compiler->type_stackp) = mk_type(T_INT, (void *)(ptrdiff_t)min, (void *)(ptrdiff_t)max, 0); } TYPE_STACK_DEBUG("push_int_type"); } static int (*program_id_to_id)(int) = NULL; PMOD_EXPORT void set_program_id_to_id( int (*to)(int) ) { program_id_to_id = to; } void debug_push_object_type(int flag, INT32 id) { if( program_id_to_id ) id = program_id_to_id(id); *(++Pike_compiler->type_stackp) = mk_type(T_OBJECT, (void *)(ptrdiff_t)flag, (void *)(ptrdiff_t)id, 0); TYPE_STACK_DEBUG("push_object_type"); } void debug_push_object_type_backwards(int flag, INT32 id) { push_object_type(flag, id); } void debug_push_scope_type(int level) { *Pike_compiler->type_stackp = mk_type(T_SCOPE, (void *)(ptrdiff_t)level, *Pike_compiler->type_stackp, PT_COPY_CDR); TYPE_STACK_DEBUG("push_scope_type"); } void debug_push_assign_type(int marker) { marker -= '0'; #ifdef PIKE_DEBUG if ((marker < 0) || (marker > 9)) { Pike_fatal("Bad assign marker: %d\n", marker); } #endif /* PIKE_DEBUG */ *Pike_compiler->type_stackp = mk_type(T_ASSIGN, (void *)(ptrdiff_t)marker, *Pike_compiler->type_stackp, PT_COPY_CDR); TYPE_STACK_DEBUG("push_assign_type"); } void debug_push_type_attribute(struct pike_string *attr) { /* fprintf(stderr, "push_type_attribute(\"%s\")\n", attr->str); */ add_ref(attr); *Pike_compiler->type_stackp = mk_type(PIKE_T_ATTRIBUTE, (void *)attr, *Pike_compiler->type_stackp, PT_COPY_CDR); TYPE_STACK_DEBUG("push_type_name"); } void debug_push_type_name(struct pike_string *name) { /* fprintf(stderr, "push_type_name(\"%s\")\n", name->str); */ add_ref(name); *Pike_compiler->type_stackp = mk_type(PIKE_T_NAME, (void *)name, *Pike_compiler->type_stackp, PT_COPY_CDR); TYPE_STACK_DEBUG("push_type_name"); } void debug_push_finished_type(struct pike_type *t) { copy_pike_type(*(++Pike_compiler->type_stackp), t); TYPE_STACK_DEBUG("push_finished_type"); } static void push_reverse_joiner_type(unsigned int type) { /* fprintf(stderr, "push_reverse_joiner_type(%d)\n", type); */ switch(type) { case T_OR: case T_AND: /* Special case: Check if the two top elements are equal. */ if (Pike_compiler->type_stackp[-1] == Pike_compiler->type_stackp[0]) { free_type(*(Pike_compiler->type_stackp--)); return; } /* Make a new type of the top two types. */ --Pike_compiler->type_stackp; #ifdef PIKE_DEBUG if ((*Pike_compiler->type_stackp)->type == type) { Pike_fatal("Invalid CAR to push_reverse_joiner_type().\n"); } #endif /* PIKE_DEBUG */ *Pike_compiler->type_stackp = mk_type(type, *Pike_compiler->type_stackp, *(Pike_compiler->type_stackp+1), PT_COPY_BOTH); break; default: Pike_fatal("Illegal reverse joiner type: %d\n", type); } } static void low_or_pike_types(struct pike_type *t1, struct pike_type *t2, int zero_implied); void debug_push_type(unsigned int type) { /* fprintf(stderr, "push_type(%d)\n", type); */ switch(type) { case T_OR: case T_AND: /* Special case: Check if the two top elements are equal. */ if (Pike_compiler->type_stackp[-1] == Pike_compiler->type_stackp[0]) { free_type(*(Pike_compiler->type_stackp--)); return; } if (Pike_compiler->type_stackp[0]->type == type) { /* The top type is the same as our type. * Split it and join the parts with the other type. */ struct pike_type *top = *(Pike_compiler->type_stackp--); push_finished_type(top->cdr); push_type(type); push_finished_type(top->car); push_type(type); free_type(top); return; } if (type == T_OR) { struct pike_type *t1 = *(Pike_compiler->type_stackp--); struct pike_type *t2 = *(Pike_compiler->type_stackp--); low_or_pike_types(t1, t2, 0); free_type(t2); free_type(t1); return; } /* FALL_THROUGH */ case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case PIKE_T_RING: /* Make a new type of the top two types. */ --Pike_compiler->type_stackp; *Pike_compiler->type_stackp = mk_type(type, *(Pike_compiler->type_stackp+1), *Pike_compiler->type_stackp, PT_COPY_BOTH); break; case T_PROGRAM: if ((*Pike_compiler->type_stackp)->type != T_OBJECT) { struct pike_type *t = (*Pike_compiler->type_stackp); while ((t->type == PIKE_T_NAME) || (t->type == PIKE_T_ATTRIBUTE)) { t = t->cdr; } if (t->type != T_OBJECT) { /* Not a program type, convert it to a type type. */ type = T_TYPE; } } /* FALL_THROUGH */ case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_STRING: /* Make a new type of the top type, and put it in car. */ *Pike_compiler->type_stackp = mk_type(type, *Pike_compiler->type_stackp, NULL, PT_COPY_CAR); break; case T_SCOPE: case T_ASSIGN: case T_INT: case T_OBJECT: case PIKE_T_ATTRIBUTE: case PIKE_T_NAME: default: /* Should not occur. */ Pike_fatal("Unsupported argument to push_type(): %d\n", type); break; case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: /* Leaf type. */ *(++Pike_compiler->type_stackp) = mk_type(type, NULL, NULL, 0); break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': /* Marker. */ *(++Pike_compiler->type_stackp) = mk_type(type, NULL, NULL, PT_IS_MARKER); break; } TYPE_STACK_DEBUG("push_type"); } /* Pop one level of types. This is the inverse of push_type() */ void debug_pop_type_stack(unsigned int expected) { struct pike_type *top; if(Pike_compiler->type_stackp<type_stack) Pike_fatal("Type stack underflow\n"); top = *(Pike_compiler->type_stackp); /* Special case... */ if ((top->type == T_MIXED) || ((top == any_type_string) && (expected != T_OR))) { /* Probably due to an earlier error */ return; } Pike_compiler->type_stackp--; #ifdef PIKE_DEBUG if ((top->type != expected) && (top->type != PIKE_T_NAME) && (top->type != PIKE_T_ATTRIBUTE)) { Pike_fatal("Unexpected type on stack: %d (expected %d)\n", top->type, expected); } #endif /* PIKE_DEBUG */ /* OPTIMIZE: It looks like this function is always called with * expected == T_ARRAY. */ switch(top->type) { case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: case PIKE_T_RING: /* Both car & cdr. */ push_finished_type(top->cdr); push_finished_type(top->car); break; case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: case T_STRING: /* car */ push_finished_type(top->car); break; case T_SCOPE: case T_ASSIGN: /* cdr */ push_finished_type(top->cdr); break; case T_INT: case T_OBJECT: case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': /* Leaf */ break; case PIKE_T_ATTRIBUTE: case PIKE_T_NAME: /* Pop the name and recurse. */ push_finished_type(top->cdr); pop_type_stack(expected); break; default: Pike_error("pop_type_stack(): Unhandled node type: %d\n", top->type); } free_type(top); TYPE_STACK_DEBUG("pop_type_stack"); } void debug_push_reverse_type(unsigned int type) { /* fprintf(stderr, "push_reverse_type(%d)\n", type); */ switch(type) { case T_FUNCTION: case T_MANY: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: case PIKE_T_RING: { /* Binary type-node. -- swap the types. */ struct pike_type *tmp = Pike_compiler->type_stackp[0]; Pike_compiler->type_stackp[0] = Pike_compiler->type_stackp[-1]; Pike_compiler->type_stackp[-1] = tmp; break; } } push_type(type); TYPE_STACK_DEBUG("push_reverse_type"); } static int is_int_type(struct pike_type *t) { loop: switch(t->type) { case T_INT: case T_ZERO: case T_VOID: case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': return 1; case T_OR: case T_AND: return is_int_type(t->car) && is_int_type(t->cdr); case PIKE_T_NAME: case PIKE_T_ATTRIBUTE: case PIKE_T_SCOPE: case T_ASSIGN: t = t->cdr; goto loop; default: return 0; } } /* The marker_set is used as follows: * * PT_FLAG_MARKER_n Indicates that marker #n should be kept after * expansion. * * PT_FLAG_ASSIGN_n Indicates that the assign to marker #n should * NOT be removed. */ static void debug_push_finished_type_with_markers(struct pike_type *type, struct pike_type **markers, INT32 marker_set) { INT32 car_set, cdr_set; recurse: #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "push_finished_type_with_markers(("); simple_describe_type(type); fprintf(stderr, "),..., 0x%08x)...\n", marker_set); } #endif /* PIKE_TYPE_DEBUG */ /* We need to replace if there are any markers, or if there's a * non-masked assign. */ if (!(type->flags & (~marker_set | PT_FLAG_MARKER) & PT_FLAG_MARK_ASSIGN)) { /* Nothing to replace in this subtree. */ #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Nothing to replace in this subtree.\n"); simple_describe_type(type); fprintf(stderr, "\n"); } #endif /* PIKE_TYPE_DEBUG */ if ((marker_set & PT_FLAG_INT_ONLY) && !is_int_type(type)) { push_finished_type(int_type_string); } else { push_finished_type(type); } return; } if ((type->type >= '0') && (type->type <= '9')) { /* Marker. */ unsigned int m = type->type - '0'; #ifdef PIKE_TYPE_DEBUG if ((l_flag > 2) && m) { fprintf(stderr, "Marker %d: %p.\n", m, markers[m]); } #endif /* PIKE_TYPE_DEBUG */ if (markers[m]) { /* The marker has a value. */ struct pike_type *type = dmalloc_touch(struct pike_type *, markers[m]); #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Marker value.\n"); } #endif /* FIXME: We probably ought to switch to the other marker set here. */ markers[m] = NULL; push_finished_type_with_markers(type, markers, marker_set & PT_FLAG_INT_ONLY); if (type->flags & (PT_FLAG_MARKER|PT_FLAG_ASSIGN)) { push_scope_type(0); } if (markers[m]) free_type(markers[m]); markers[m] = dmalloc_touch(struct pike_type *, type); } else { /* The marker has not been set. */ #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "No marker value.\n"); } #endif } if (marker_set & (PT_FLAG_MARKER_0 << m)) { /* The marker should be kept. */ #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Keep marker.\n"); } #endif push_type(type->type); if (markers[m]) push_type(T_OR); } else if (!markers[m]) { push_type(T_ZERO); } TYPE_STACK_DEBUG("push_finished_type_with_markers"); return; } else if (type->type == T_ASSIGN) { /* Assign. */ int marker = PTR_TO_INT(type->car); #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Assign to marker %"PRINTPTRDIFFT"d.\n", CAR_TO_INT(type)); } #endif /* PIKE_TYPE_DEBUG */ if (marker_set & (PT_FLAG_ASSIGN_0 << marker)) { /* The assignment should be kept as-is. */ #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Keep assignment.\n"); } #endif /* PIKE_TYPE_DEBUG */ /* Clear the flag. */ push_finished_type_with_markers(type->cdr, markers, marker_set & ~(PT_FLAG_ASSIGN_0 << marker)); push_assign_type('0' + marker); TYPE_STACK_DEBUG("push_finished_type_with_markers"); return; } else { #ifdef PIKE_TYPE_DEBUG if (l_flag > 2) { fprintf(stderr, "Strip assignment.\n"); } #endif /* PIKE_TYPE_DEBUG */ type = type->cdr; goto recurse; } } else if (type->type == PIKE_T_NAME) { /* Strip the name, since it won't be correct anymore. */ type = type->cdr; goto recurse; } else if (type->type == PIKE_T_ATTRIBUTE) { /* Keep the attribute. */ push_finished_type_with_markers(type->cdr, markers, marker_set); push_type_attribute((struct pike_string *)type->car); goto done; } /* FIXME: T_SCOPE */ if (type->car) { /* Keep markers for assigns in the car. */ cdr_set = marker_set | ((type->car->flags & PT_FLAG_ASSIGN)>>PT_ASSIGN_SHIFT); } else { cdr_set = marker_set; } if (type->cdr) { /* Keep assigns for markers in the cdr. */ car_set = marker_set | ((type->cdr->flags & PT_FLAG_MARKER)<<PT_ASSIGN_SHIFT); } else { car_set = marker_set; } if ((type->type == T_OR) || (type->type == T_AND)) { /* Special case handling for implicit zero. */ /* FIXME: Probably ought to use {or,and}_pike_types() here. * Problem is that they may mess with the markers... */ type_stack_mark(); /* We want to keep markers that have assigns in the car. */ push_finished_type_with_markers(type->cdr, markers, cdr_set); if (type->type == T_OR) { struct pike_type *first = pop_type(); struct pike_type *second; struct pike_type *res; push_finished_type_with_markers(type->car, markers, car_set); second = pop_unfinished_type(); push_finished_type(res = or_pike_types(first, second, 1)); free_type(second); free_type(first); free_type(res); } else if (peek_type_stack() == zero_type_string) { pop_stack_mark(); } else { type_stack_mark(); push_finished_type_with_markers(type->car, markers, car_set); if (peek_type_stack() == zero_type_string) { free_type(pop_unfinished_type()); free_type(pop_unfinished_type()); push_finished_type(zero_type_string); } else { pop_stack_mark(); pop_stack_mark(); push_type(T_AND); } } } else { if (type->cdr) { /* In all other cases type->cdr will be a valid node if is not NULL. */ push_finished_type_with_markers(type->cdr, markers, cdr_set); } /* Make sure to filter invalid nodes from the marker in case * it is a string type. */ if (type->type == PIKE_T_STRING) car_set |= PT_FLAG_INT_ONLY; /* In all other cases type->car will be a valid node. */ push_finished_type_with_markers(type->car, markers, car_set); /* push_type has sufficient magic to recreate the type. */ push_type(type->type); } done: TYPE_STACK_DEBUG("push_finished_type_with_markers"); } static void push_type_field(TYPE_FIELD field) { field &= (BIT_BASIC|BIT_COMPLEX); if (!field) { /* No values. */ push_type(T_ZERO); } else if (field == (BIT_BASIC|BIT_COMPLEX)) { /* All values. */ push_type(T_MIXED); } else { /* Check the bits... */ push_type(T_ZERO); if (field & BIT_COMPLEX) { if (field & BIT_ARRAY) { push_type(T_MIXED); push_type(T_ARRAY); push_type(T_OR); } if (field & BIT_MAPPING) { push_type(T_MIXED); push_type(T_MIXED); push_type(T_MAPPING); push_type(T_OR); } if (field & BIT_MULTISET) { push_type(T_MIXED); push_type(T_MULTISET); push_type(T_OR); } if (field & BIT_OBJECT) { push_object_type(0, 0); push_type(T_OR); } if (field & BIT_FUNCTION) { push_type(T_ZERO); push_type(T_ZERO); push_type(T_MIXED); push_type(T_OR); push_type(T_MANY); push_type(T_OR); } if (field & BIT_PROGRAM) { push_object_type(0, 0); push_type(T_PROGRAM); push_type(T_OR); } } if (field & BIT_BASIC) { if (field & BIT_STRING) { push_int_type(MIN_INT32, MAX_INT32); push_type(T_STRING); push_type(T_OR); } if (field & BIT_TYPE) { push_type(T_MIXED); push_type(T_TYPE); push_type(T_OR); } if (field & BIT_INT) { push_int_type(MIN_INT32, MAX_INT32); push_type(T_OR); } if (field & BIT_FLOAT) { push_type(T_FLOAT); push_type(T_OR); } } } } INT32 extract_type_int(char *p) { return get_unaligned_be32(p); } struct pike_type *debug_pop_unfinished_type(void) { ptrdiff_t len; len = pop_stack_mark(); if (len != 1) { Pike_fatal("pop_unfinished_type(): Unexpected len: %"PRINTPTRDIFFT"d\n", len); } TYPE_STACK_DEBUG("pop_unfinished_type"); return *(Pike_compiler->type_stackp--); } /******/ static struct pike_string *internal_parse_type_string(const char **_s) { const unsigned char **s = (const unsigned char **)_s; const unsigned char *p; struct string_builder tmp; while(isspace(**s)) ++*s; if(**s != '\"') yyerror("Expected '\"'."); else ++*s; init_string_builder(&tmp, 0); p = *s; while(1) { int c; do { c = *p++; } while ((c > '\\') || ((c != '\"') && (c != '\\') && (c != '\n'))); string_builder_binary_strcat(&tmp, *_s, p - (1 + *s)); if (c == '"') { *s = ++p; break; } else if (c == '\\') { p_wchar2 buf; ptrdiff_t len = 0; if (!parse_esc_seq0((p_wchar0 *)p, &buf, &len)) { string_builder_putchar(&tmp, buf); p += len; } else { yyerror("Invalid \\-escape."); } } else { yyerror("Expected '\"'."); break; } *s = p; } return finish_string_builder(&tmp); } static void internal_parse_typeA(const char **_s) { char buf[80]; unsigned int len; const unsigned char **s = (const unsigned char **)_s; while(isspace(**s)) ++*s; for(len=0;isidchar(EXTRACT_UCHAR(s[0]+len));len++) { if(len>=sizeof(buf)-1) { my_yyerror("Buffer overflow in parse_type(\"%s\") (limit %"PRINTSIZET"d).", *s, sizeof(buf)); push_type(T_MIXED); return; } buf[len] = s[0][len]; } buf[len]=0; *s += len; switch(buf[0]) { case 'z': if(!strcmp(buf,"zero")) { push_type(T_ZERO); break; } goto bad_type; case 'i': if(!strcmp(buf,"int")) { while(isspace(**s)) ++*s; if(**s=='(') { INT32 min,max; ++*s; while(isspace(**s)) ++*s; if (**s != '.') { min=strtol((const char *)*s,(char **)s,0); while(isspace(**s)) ++*s; } else { min = MIN_INT32; } if(s[0][0]=='.' && s[0][1]=='.') s[0]+=2; else { yyerror("Missing .. in integer type."); } while(isspace(**s)) ++*s; if (**s != ')') { max=strtol((const char *)*s,(char **)s,0); while(isspace(**s)) ++*s; } else { max = MAX_INT32; } if(**s != ')') yyerror("Missing ')' in integer range."); else ++*s; push_int_type(min, max); }else{ push_int_type(MIN_INT32, MAX_INT32); } break; } goto bad_type; case 'f': if(!strcmp(buf,"function")) { while(isspace(**s)) ++*s; if(**s == '(') { int nargs = 0; ++*s; while(isspace(**s)) ++*s; while(1) { if(**s == ':') { push_type(T_VOID); break; } internal_parse_type(_s); if(**s==',') { nargs++; ++*s; while(isspace(**s)) ++*s; } else if(s[0][0]=='.' && s[0][1]=='.' && s[0][2]=='.') { *s+=3; while(isspace(**s)) ++*s; if(**s != ':') { yyerror("Missing ':' after ... in function type."); --*s; } break; } else { nargs++; } } /* Skip the colon. */ ++*s; internal_parse_type(_s); /* return type */ push_reverse_type(T_MANY); while (nargs-- > 0) { push_reverse_type(T_FUNCTION); } if(**s != ')') yyerror("Missing ')' in function type."); else ++*s; }else{ push_type(T_VOID); push_type(T_MIXED); push_type(T_OR); push_type(T_VOID); push_type(T_ZERO); push_type(T_OR); push_type(T_MANY); } break; } if(!strcmp(buf,"float")) { push_type(T_FLOAT); break; } goto bad_type; case 'o': if(!strcmp(buf,"object")) { while(isspace(**s)) ++*s; if(**s == '(') /* object({,is,implements} {id,this_program}) */ { int is = 0, id; ++*s; while(isspace(**s)) ++*s; if( **s != 'i' ) goto no_is_implements; ++*s; if( **s == 's' ) { ++*s; if (**s != ' ') { goto bad_type; } is = 1; ++*s; } else { if (strncmp((const char *)*s, "mplements ", 10)) { goto bad_type; } *s += 10; } while(isspace(**s)) ++*s; no_is_implements: if( !**s ) goto bad_type; if (!strncmp((const char *)*s, "this_program", 12)) { id = Pike_compiler->new_program->id; *s += 12; } else { id = atoi( (const char *)*s ); while( **s >= '0' && **s <= '9' ) ++*s; } while(isspace(**s)) ++*s; if( !**s || **s != ')' ) goto bad_type; ++*s; push_object_type(is, id); } else push_object_type(0, 0); break; } goto bad_type; case 'p': if(!strcmp(buf,"program")) { push_object_type(0, 0); push_type(T_PROGRAM); break; } goto bad_type; case 's': if(!strcmp(buf,"string")) { while(isspace(**s)) ++*s; if(**s == '(') { INT32 min,max; ++*s; while(isspace(**s)) ++*s; if (**s != '.') { min=strtol((const char *)*s,(char **)s,0); while(isspace(**s)) ++*s; } else { min = MIN_INT32; } if(s[0][0]=='.' && s[0][1]=='.') s[0]+=2; else { yyerror("Missing .. in integer type."); } while(isspace(**s)) ++*s; if (**s != ')') { max=strtol((const char *)*s,(char **)s,0); while(isspace(**s)) ++*s; } else { max = MAX_INT32; } if(**s != ')') yyerror("Missing ')' in string width."); else ++*s; push_int_type(min, max); } else { push_finished_type(int_type_string); } push_type(T_STRING); break; } goto bad_type; case 'v': if(!strcmp(buf,"void")) { push_type(T_VOID); break; } goto bad_type; case 't': if (!strcmp(buf,"tuple")) { while(isspace(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ',') yyerror("Expected ','."); else ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; }else{ push_type(T_MIXED); push_type(T_MIXED); } push_reverse_type(T_TUPLE); break; } /* FIXME: Handle type(T) */ if(!strcmp(buf,"type")) { push_type(T_MIXED); push_type(T_TYPE); break; } goto bad_type; case 'm': if(!strcmp(buf,"mixed")) { push_type(T_MIXED); break; } if(!strcmp(buf,"mapping")) { while(isspace(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ':') yyerror("Expected ':'."); else ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; }else{ push_type(T_MIXED); push_type(T_MIXED); } push_reverse_type(T_MAPPING); break; } if(!strcmp(buf,"multiset")) { while(isspace(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; }else{ push_type(T_MIXED); } push_type(T_MULTISET); break; } goto bad_type; case 'u': if(!strcmp(buf,"unknown")) { push_type(PIKE_T_UNKNOWN); break; } goto bad_type; case 'a': if(!strcmp(buf,"array")) { while(isspace(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; }else{ push_type(T_MIXED); } push_type(T_ARRAY); break; } goto bad_type; case '_': if (!strcmp(buf, "__attribute__")) { while(isspace(**s)) ++*s; if(**s == '(') { struct pike_string *attr; ++*s; attr = internal_parse_type_string(_s); while(isspace(**s)) ++*s; if(**s != ',') yyerror("Expected ','."); else ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; push_type_attribute(attr); free_string(attr); }else{ push_type(T_MIXED); } break; } else if (!strcmp(buf, "__deprecated__")) { struct pike_string *deprecated_string; MAKE_CONST_STRING(deprecated_string, "deprecated"); while(isspace(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ')') yyerror("Expected ')'."); else ++*s; }else{ push_type(T_MIXED); } push_type_attribute(deprecated_string); free_string(deprecated_string); break; } goto bad_type; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if(atoi(buf)<10) { while(isspace(**s)) ++*s; if(**s=='=') { ++*s; internal_parse_type(_s); push_assign_type(buf[0]); }else{ push_type(buf[0]); } break; } default: bad_type: push_type(T_MIXED); my_yyerror("Couldn't parse type. (%s).", buf); } while(isspace(**s)) ++*s; } static void internal_parse_typeB(const char **s) { while(isspace(EXTRACT_UCHAR(*s))) ++*s; switch(**s) { case '!': ++*s; internal_parse_typeB(s); push_type(T_NOT); break; case '(': ++*s; internal_parse_type(s); while(isspace(EXTRACT_UCHAR(*s))) ++*s; if(**s != ')') { yyerror("Expected ')' in type."); } ++*s; break; default: internal_parse_typeA(s); } } static void internal_parse_typeCC(const char **s) { internal_parse_typeB(s); while(isspace(EXTRACT_UCHAR(*s))) ++*s; while(**s == '*') { ++*s; while(isspace(EXTRACT_UCHAR(*s))) ++*s; push_type(T_ARRAY); } } static void internal_parse_typeC(const char **s) { internal_parse_typeCC(s); if(**s == '&') { ++*s; internal_parse_typeC(s); push_reverse_type(T_AND); } } static void internal_parse_type(const char **s) { internal_parse_typeC(s); while(**s == '|') { ++*s; internal_parse_typeC(s); push_type(T_OR); } } /* This function is used when adding simul efuns so that * the types for the functions can be easily stored in strings. * It takes a string on the exact same format as Pike and returns a type * struct. */ struct pike_type *parse_type(const char *s) { struct pike_type *ret; #ifdef PIKE_DEBUG struct pike_type **ts=Pike_compiler->type_stackp; struct pike_type ***ptms=Pike_compiler->pike_type_mark_stackp; #endif /* fprintf(stderr, "parse_type(\"%s\")...\n", s); */ TYPE_STACK_DEBUG("parse_type"); type_stack_mark(); internal_parse_type(&s); if( *s ) yyerror("Extra junk at end of type definition."); ret=pop_unfinished_type(); #ifdef PIKE_DEBUG if(ts!=Pike_compiler->type_stackp || ptms!=Pike_compiler->pike_type_mark_stackp) Pike_fatal("Type stack whacked in parse_type.\n"); #endif return ret; } #ifdef PIKE_DEBUG /* FIXME: */ void stupid_describe_type_string(char *a, ptrdiff_t len) { ptrdiff_t e; for(e=0;e<len;e++) { if(e) fprintf(stderr, " "); switch(EXTRACT_UCHAR(a+e)) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': fprintf(stderr, "%c",EXTRACT_UCHAR(a+e)); break; case T_SCOPE: fprintf(stderr, "scope"); break; case T_TUPLE: fprintf(stderr, "tuple"); break; case T_ASSIGN: fprintf(stderr, "="); break; case T_INT: { INT32 min=extract_type_int(a+e+1); INT32 max=extract_type_int(a+e+1+sizeof(INT32)); fprintf(stderr, "int"); if(min!=MIN_INT32 || max!=MAX_INT32) { if (!min && max && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } fprintf(stderr, "(%dbit)", j); } else { fprintf(stderr, "(%ld..%ld)",(long)min,(long)max); } } e+=sizeof(INT32)*2; break; } case T_FLOAT: fprintf(stderr, "float"); break; case T_STRING: fprintf(stderr, "string"); break; case T_TYPE: fprintf(stderr, "type"); break; case T_PROGRAM: fprintf(stderr, "program"); break; case T_OBJECT: fprintf(stderr, "object(%s %ld)", EXTRACT_UCHAR(a+e+1)?"is":"implements", (long)extract_type_int(a+e+2)); e+=sizeof(INT32)+1; break; case T_FUNCTION: fprintf(stderr, "function"); break; case T_ARRAY: fprintf(stderr, "array"); break; case T_MAPPING: fprintf(stderr, "mapping"); break; case T_MULTISET: fprintf(stderr, "multiset"); break; case PIKE_T_UNKNOWN: fprintf(stderr, "unknown"); break; case T_MANY: fprintf(stderr, "many"); break; case T_OR: fprintf(stderr, "or"); break; case T_AND: fprintf(stderr, "and"); break; case T_NOT: fprintf(stderr, "not"); break; case T_VOID: fprintf(stderr, "void"); break; case T_ZERO: fprintf(stderr, "zero"); break; case T_MIXED: fprintf(stderr, "mixed"); break; default: fprintf(stderr, "%d",EXTRACT_UCHAR(a+e)); break; } } fprintf(stderr, "\n"); } #endif void simple_describe_type(struct pike_type *s) { if (s) { /* fprintf(stderr, "[[[%p]]]", s); */ switch(s->type) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': fprintf(stderr, "%d", s->type-'0'); break; case PIKE_T_NAME: fprintf(stderr, "{ %s = ", ((struct pike_string *)s->car)->str); simple_describe_type(s->cdr); fprintf(stderr, " }"); break; case PIKE_T_ATTRIBUTE: { struct pike_string *deprecated; MAKE_CONST_STRING(deprecated, "deprecated"); if (((struct pike_string *)s->car) == deprecated) { fprintf(stderr, "__deprecated__("); } else { fprintf(stderr, "__attribute__(\"%s\", ", ((struct pike_string *)s->car)->str); } simple_describe_type(s->cdr); fprintf(stderr, ")"); } break; case T_SCOPE: fprintf(stderr, "scope(%"PRINTPTRDIFFT"d, ", CAR_TO_INT(s)); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_TUPLE: fprintf(stderr, "tuple("); simple_describe_type(s->car); fprintf(stderr, ", "); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_ASSIGN: fprintf(stderr, "(%"PRINTPTRDIFFT"d = ", CAR_TO_INT(s)); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_INT: { INT32 min = CAR_TO_INT(s); INT32 max = CDR_TO_INT(s); fprintf(stderr, "int"); if(min!=MIN_INT32 || max!=MAX_INT32) { if (!min && max && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } fprintf(stderr, "(%dbit)", j); } else { fprintf(stderr, "(%ld..%ld)",(long)min,(long)max); } } break; } case T_FLOAT: fprintf(stderr, "float"); break; case T_STRING: { INT32 min; INT32 max; s = s->car; fprintf(stderr, "string"); if (s != int_type_string) { fprintf(stderr, "("); while (s->type == T_OR) { struct pike_type *char_type = s->car; while(char_type->type == T_ASSIGN) { char_type = char_type->cdr; } if (char_type->type == T_ZERO) { fprintf(stderr, "zero | "); s = s->cdr; continue; } if ((char_type->type >= '0') && (char_type->type <= '9')) { fprintf(stderr, "$%c | ", char_type->type); s = s->cdr; continue; } #ifdef PIKE_DEBUG if (char_type->type != T_INT) { Pike_fatal("Invalid node type (%d:%s) in string type.\n", char_type->type, get_name_of_type(char_type->type)); } #endif /* PIKE_DEBUG */ min = CAR_TO_INT(char_type); max = CDR_TO_INT(char_type); if (!min && max && max != MAX_INT32 && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } fprintf(stderr, "%dbit", j); } else { if (min != MIN_INT32) { fprintf(stderr, "%d", min); } fprintf(stderr, ".."); if (max != MAX_INT32) { fprintf(stderr, "%d", max); } } fprintf(stderr, " | "); s = s->cdr; } while(s->type == T_ASSIGN) { s = s->cdr; } if (s->type == T_ZERO) { fprintf(stderr, "zero"); } else if ((s->type >= '0') && (s->type <= '9')) { fprintf(stderr, "$%c", s->type); } else { #ifdef PIKE_DEBUG if (s->type != T_INT) { Pike_fatal("Invalid node type (%d:%s) in string type.\n", s->type, get_name_of_type(s->type)); } #endif /* PIKE_DEBUG */ min = CAR_TO_INT(s); max = CDR_TO_INT(s); if (!min && max && max != MAX_INT32 && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } fprintf(stderr, "%dbit", j); } else { if (min != MIN_INT32) { fprintf(stderr, "%d", min); } fprintf(stderr, ".."); if (max != MAX_INT32) { fprintf(stderr, "%d", max); } } } fprintf(stderr, ")"); } break; } case T_TYPE: fprintf(stderr, "type("); simple_describe_type(s->car); fprintf(stderr, ")"); break; case T_PROGRAM: fprintf(stderr, "program("); simple_describe_type(s->car); fprintf(stderr, ")"); break; case T_OBJECT: fprintf(stderr, "object(%s %"PRINTPTRDIFFT"d)", s->car?"is":"implements", CDR_TO_INT(s)); break; case T_FUNCTION: case T_MANY: fprintf(stderr, "function("); while(s->type == T_FUNCTION) { simple_describe_type(s->car); s = s->cdr; while(s->type == T_ASSIGN) { fprintf(stderr, "%"PRINTPTRDIFFT"d = ", CAR_TO_INT(s)); s = s->cdr; } if ((s->type == T_FUNCTION) || (s->car->type != T_VOID)) { fprintf(stderr, ", "); } } if (s->car->type != T_VOID) { simple_describe_type(s->car); fprintf(stderr, "..."); } fprintf(stderr, ":"); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_ARRAY: fprintf(stderr, "array("); simple_describe_type(s->car); fprintf(stderr, ")"); break; case T_MAPPING: fprintf(stderr, "mapping("); simple_describe_type(s->car); fprintf(stderr, ":"); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_MULTISET: fprintf(stderr, "multiset("); simple_describe_type(s->car); fprintf(stderr, ")"); break; case PIKE_T_UNKNOWN: fprintf(stderr, "unknown"); break; case PIKE_T_RING: fprintf(stderr, "ring("); simple_describe_type(s->car); fprintf(stderr, "\260"); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_OR: fprintf(stderr, "or("); simple_describe_type(s->car); fprintf(stderr, "|"); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_AND: fprintf(stderr, "and("); simple_describe_type(s->car); fprintf(stderr, "&"); simple_describe_type(s->cdr); fprintf(stderr, ")"); break; case T_NOT: fprintf(stderr, "not("); simple_describe_type(s->car); fprintf(stderr, ")"); break; case T_VOID: fprintf(stderr, "void"); break; case T_ZERO: fprintf(stderr, "zero"); break; case T_MIXED: fprintf(stderr, "mixed"); break; default: fprintf(stderr, "Unknown type node: %d, %p:%p", s->type, s->car, s->cdr); #ifdef DEBUG_MALLOC debug_malloc_dump_references(s, 0, 2, 0); #endif break; } if (s->flags) { fprintf(stderr, "[%06x]", s->flags); } } else { fprintf(stderr, "NULL"); } } static void low_describe_type(struct pike_type *t) { char buffer[100]; check_c_stack(1024); /**** FIXME: ****/ switch(t->type) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': my_putchar(t->type); break; case T_ASSIGN: my_putchar('('); my_putchar('0' + CAR_TO_INT(t)); my_putchar('='); my_describe_type(t->cdr); my_putchar(')'); break; case T_SCOPE: my_strcat("scope("); my_putchar('0' + CAR_TO_INT(t)); my_putchar(','); my_describe_type(t->cdr); my_putchar(')'); break; case T_TUPLE: my_putchar('['); my_describe_type(t->car); my_putchar(','); my_describe_type(t->cdr); my_putchar(']'); break; case T_VOID: my_strcat("void"); break; case T_ZERO: my_strcat("zero"); break; case T_MIXED: my_strcat("mixed"); break; case PIKE_T_UNKNOWN: my_strcat("unknown"); break; case T_INT: { INT32 min=CAR_TO_INT(t); INT32 max=CDR_TO_INT(t); my_strcat("int"); if (!min && max && max != MAX_INT32 && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } sprintf(buffer, "(%dbit)", j); my_strcat(buffer); } else if(min!=MIN_INT32 || max!=MAX_INT32) { sprintf(buffer,"(%ld..%ld)",(long)min,(long)max); my_strcat(buffer); } break; } case T_FLOAT: my_strcat("float"); break; case T_PROGRAM: if ((t->car->type == T_OBJECT) && (!t->car->cdr)) { my_strcat("program"); } else { my_strcat("program("); my_describe_type(t->car); my_strcat(")"); } break; case T_OBJECT: if (t->cdr) { dynamic_buffer save_buf; ONERROR err; struct svalue s; if (t->car) { my_strcat("object(is "); } else { my_strcat("object(implements "); } /* We need to save the global buffer, in case id_to_program() * starts running Pike code. */ save_buffer(&save_buf); SET_ONERROR(err, restore_buffer, &save_buf); s.u.program = id_to_program(CDR_TO_INT(t)); CALL_AND_UNSET_ONERROR(err); if (s.u.program) { SET_SVAL_TYPE(s, T_PROGRAM); SET_SVAL_SUBTYPE(s, 0); describe_svalue(&s, 0, NULL); my_strcat(")"); } else { char buffer[100]; sprintf(buffer,"%"PRINTPTRDIFFT"d)", CDR_TO_INT(t)); my_strcat(buffer); } }else{ my_strcat("object"); } break; case T_STRING: { INT32 min; INT32 max; t = t->car; my_strcat("string"); if (t->type == T_ZERO) { my_strcat("(zero)"); } else if (t != int_type_string) { my_strcat("("); while (t->type == T_OR) { struct pike_type *char_type = t->car; while(char_type->type == T_ASSIGN) { char_type = char_type->cdr; } if (char_type->type != T_INT) { low_describe_type(char_type); } else { min = CAR_TO_INT(char_type); max = CDR_TO_INT(char_type); if (!min && max && max != MAX_INT32 && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } sprintf(buffer, "%dbit", j); my_strcat(buffer); } else { if (min != MIN_INT32) { sprintf(buffer, "%d", min); my_strcat(buffer); } my_strcat(".."); if (max != MAX_INT32) { sprintf(buffer, "%d", max); my_strcat(buffer); } } } my_strcat(" | "); t = t->cdr; } while(t->type == T_ASSIGN) { t = t->cdr; } if (t->type != T_INT) { low_describe_type(t); } else { min = CAR_TO_INT(t); max = CDR_TO_INT(t); if (!min && max && max != MAX_INT32 && !(max & (max+1))) { int j = 0; while (max) { max >>= 1; j++; } sprintf(buffer, "%dbit", j); my_strcat(buffer); } else { if (min != MIN_INT32) { sprintf(buffer, "%d", min); my_strcat(buffer); } my_strcat(".."); if (max != MAX_INT32) { sprintf(buffer, "%d", max); my_strcat(buffer); } } } my_strcat(")"); } break; } case T_TYPE: my_strcat("type("); my_describe_type(t->car); my_strcat(")"); break; case PIKE_T_NAME: if (!((struct pike_string *)t->car)->size_shift) { my_strcat("{ "); my_binary_strcat(((struct pike_string *)t->car)->str, ((struct pike_string *)t->car)->len); my_strcat(" = "); my_describe_type(t->cdr); my_strcat(" }"); } else { my_describe_type(t->cdr); } break; case PIKE_T_ATTRIBUTE: if (!((struct pike_string *)t->car)->size_shift) { struct pike_string *deprecated; MAKE_CONST_STRING(deprecated, "deprecated"); if (((struct pike_string *)t->car) == deprecated) { my_strcat("__deprecated__("); } else { my_strcat("__attribute__(\""); my_binary_strcat(((struct pike_string *)t->car)->str, ((struct pike_string *)t->car)->len); my_strcat("\", "); } my_describe_type(t->cdr); my_strcat(")"); } else { my_describe_type(t->cdr); } break; case T_FUNCTION: case T_MANY: { int s; my_strcat("function"); if(t->type == T_MANY && t->cdr->type == T_OR && ((t->cdr->car->type == T_MIXED && t->cdr->cdr->type == T_VOID) || (t->cdr->cdr->type == T_MIXED && t->cdr->car->type == T_VOID)) && (t->car->type == T_ZERO || (t->car->type == T_OR && ((t->car->car->type == T_ZERO && t->car->cdr->type == T_VOID) || (t->car->cdr->type == T_ZERO && t->car->car->type == T_VOID))))) { /* function == function(zero...:mixed|void) or * function(zero|void...:mixed|void) */ /* done */ } else { my_strcat("("); s=0; while(t->type != T_MANY) { if(s++) my_strcat(", "); my_describe_type(t->car); t = t->cdr; while(t->type == T_ASSIGN) { my_putchar('0' + CAR_TO_INT(t)); my_putchar('='); t = t->cdr; } } if(t->car->type != T_VOID) { if(s++) my_strcat(", "); my_describe_type(t->car); my_strcat(" ..."); } my_strcat(" : "); my_describe_type(t->cdr); my_strcat(")"); } break; } case T_ARRAY: my_strcat("array"); if(t->car->type != T_MIXED) { my_strcat("("); my_describe_type(t->car); my_strcat(")"); } break; case T_MULTISET: my_strcat("multiset"); if(t->car->type != T_MIXED) { my_strcat("("); my_describe_type(t->car); my_strcat(")"); } break; case T_NOT: my_strcat("!"); if (t->car->type > T_NOT) { my_strcat("("); my_describe_type(t->car); my_strcat(")"); } else { my_describe_type(t->car); } break; case PIKE_T_RING: /* FIXME: Should be renumbered for correct parenthesing. */ my_strcat("("); my_describe_type(t->car); my_strcat(")\260("); my_describe_type(t->cdr); my_strcat(")"); break; case T_OR: if (t->car->type > T_OR) { my_strcat("("); my_describe_type(t->car); my_strcat(")"); } else { my_describe_type(t->car); } my_strcat(" | "); if (t->cdr->type > T_OR) { my_strcat("("); my_describe_type(t->cdr); my_strcat(")"); } else { my_describe_type(t->cdr); } break; case T_AND: if (t->car->type > T_AND) { my_strcat("("); my_describe_type(t->car); my_strcat(")"); } else { my_describe_type(t->car); } my_strcat(" & "); if (t->cdr->type > T_AND) { my_strcat("("); my_describe_type(t->cdr); my_strcat(")"); } else { my_describe_type(t->cdr); } break; case T_MAPPING: my_strcat("mapping"); if(t->car->type != T_MIXED || t->cdr->type != T_MIXED) { my_strcat("("); my_describe_type(t->car); my_strcat(":"); my_describe_type(t->cdr); my_strcat(")"); } break; default: { char buf[20]; my_strcat("unknown code("); sprintf(buf, "%d", t->type); my_strcat(buf); my_strcat(")"); break; } } } void my_describe_type(struct pike_type *type) { low_describe_type(type); } struct pike_string *describe_type(struct pike_type *type) { dynamic_buffer save_buf; check_type_string(type); if(!type) return make_shared_string("mixed"); init_buf(&save_buf); low_describe_type(type); return free_buf(&save_buf); } /******/ TYPE_T compile_type_to_runtime_type(struct pike_type *t) { switch(t->type) { case PIKE_T_RING: return compile_type_to_runtime_type(t->car); case T_OR: { TYPE_T tmp = compile_type_to_runtime_type(t->car); if(tmp == compile_type_to_runtime_type(t->cdr)) return tmp; /* FALL_THROUGH */ } case T_TUPLE: /* FIXME: Shouldn't occur/should be converted to array? */ /* FALL_THROUGH */ default: return T_MIXED; case T_ZERO: return T_INT; case T_SCOPE: case PIKE_T_NAME: case PIKE_T_ATTRIBUTE: return compile_type_to_runtime_type(t->cdr); case T_MANY: return T_FUNCTION; case T_ARRAY: case T_MAPPING: case T_MULTISET: case T_OBJECT: case T_PROGRAM: case T_FUNCTION: case T_STRING: case T_TYPE: case T_INT: case T_FLOAT: return t->type; } } static void low_or_pike_types(struct pike_type *t1, struct pike_type *t2, int zero_implied); /* Push either t1, t2 or the OR of t1 and t2. * Returns -1 if t1 was pushed. * 0 if the OR was pushed. (Successful join) * 1 if t2 was pushed. * * zero_implied: One of: * 0 the zero type (if any) must be explicit in the result. * 1 the zero type is implicit. * 3 zero is implicit and integers are regarded as masks (cf enums). */ static int lower_or_pike_types(struct pike_type *t1, struct pike_type *t2, int zero_implied, int elem_on_stack) { int ret = 0; struct pike_type *t = NULL; struct pike_type *top = NULL; #if 0 fprintf(stderr, " lower_or_pike_types("); simple_describe_type(t1); fprintf(stderr, ", "); simple_describe_type(t2); fprintf(stderr, ")\n"); #endif if (t1 == t2) { t = t1; } else if (!t1) { t = t2; ret = 1; } else if (!t2) { t = t1; ret = -1; } else if (zero_implied && (t1->type == T_ZERO)) { t = t2; } else if (zero_implied && (t2->type == T_ZERO)) { t = t1; } else if ((t1->type ^ '0') < (t2->type ^ '0')) { /* Note: Adjusted order to get markers first. */ t = t1; ret = -1; } else if ((t1->type ^ '0') > (t2->type ^ '0')) { /* Note: Adjusted order to get markers first. */ t = t2; ret = 1; } else { #ifdef PIKE_DEBUG if (t1->type != t2->type) { Pike_fatal("Lost track of types t1->type: %d, t2->type: %d\n", t1->type, t2->type); } #endif /* PIKE_DEBUG */ switch(t1->type) { case T_INT: if (CAR_TO_INT(t1) < CAR_TO_INT(t2)) { t = t1; ret = -1; } else { t = t2; ret = 1; } break; case T_STRING: { low_or_pike_types(t1->car, t2->car, 1); push_type(T_STRING); return 0; } break; case T_OBJECT: if (!CDR_TO_INT(t1)) { t = t1; } else if (!CDR_TO_INT(t2)) { t = t2; } else if (CDR_TO_INT(t1) < CDR_TO_INT(t2)) { t = t1; ret = -1; } else { t = t2; ret = 1; } break; case T_MAPPING: if (t1->car->type < t2->car->type) { t = t1; ret = -1; break; } if (t1->car->type > t2->car->type) { t = t2; ret = 1; break; } if (t1->cdr->type < t2->cdr->type) { t = t1; ret = -1; break; } if (t1->cdr->type > t2->cdr->type) { t = t2; ret = 1; break; } t = t1; ret = -1; break; case T_ARRAY: case T_MULTISET: if (t1->car->type < t2->car->type) { t = t1; ret = -1; break; } else if (t1->car->type > t2->car->type) { t = t2; ret = 1; break; } /* FALL_THOUGH */ default: #if 0 if (pike_types_le(t1, t2)) { t = t2; } else if (pike_types_le(t2, t1)) { t = t1; } else #endif /* 0 */ if (t1 < t2) { t = t1; ret = -1; } else { t = t2; ret = 1; } break; } } if (!elem_on_stack) { if (t) { push_finished_type(t); } else { push_type(T_ZERO); } } else if (!t) { /* No need to do anything. */ } else if ((top = peek_type_stack())->type != t->type) { if (zero_implied && (top->type == T_ZERO)) { Pike_compiler->type_stackp--; free_type(top); push_finished_type(t); } else if (zero_implied && (t->type == T_ZERO)) { /* The zero is implied. */ } else { push_finished_type(t); } } else if (t == top) { /* No need to do anything. */ } else { switch(t->type) { case T_FLOAT: case T_MIXED: case T_VOID: case T_ZERO: /* There can only be one. */ break; case T_INT: { INT32 min1 = CAR_TO_INT(t); INT32 max1 = CDR_TO_INT(t); INT32 min2 = CAR_TO_INT(top); INT32 max2 = CDR_TO_INT(top); if (zero_implied) { if (min1 == 1) min1 = 0; if (min2 == 1) min2 = 0; if (max1 == -1) max1 = 0; if (max2 == -1) max2 = 0; if (zero_implied == 3) { /* Or between integer masks. * This is a bit more lenient than the default further below, * and is used for generating the type for enums. */ /* Ensure that zero is always in the range. * This also ensures that there'll be an overlap. */ if (max1 < 0) max1 = 0; if (max2 < 0) max2 = 0; if (min1 > 0) min1 = 0; if (min2 > 0) min2 = 0; /* Both max values are now >= 0, so this or is safe. */ max1 |= max2; if ((min1 < 0) && (min2 < 0)) { min1 &= min2; } } } if ((max2 < MAX_INT32) && (min1 > max2 + 1)) { /* No overlap. */ push_finished_type(t); #ifdef PIKE_DEBUG } else if ((max1 < MAX_INT32) && (min2 > max1 + 1)) { /* No overlap and wrong order! */ Pike_fatal("Bad integer ordering in lower_or_pike_types().\n"); #endif }

pike.git/ src/ pike_types.c > 77edda3605d2e7a379370369e32edfe453f8e36e [Annotate]