pike.git/src/pike_types.c:d96f38f849d0e2a67fa8dbc744a8d44634987bb8

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5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 /* || 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. || $Id: pike_types.c,v 1.246 2005/04/06 17:38:15 grubba Exp $ */ #include "global.h" #include <ctype.h> #include "svalue.h" #include "pike_types.h" #include "stralloc.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 "block_alloc.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 /* * Flags used by pike_types_le() */ #define LE_WEAK_OBJECTS 1 /* Perform weaker checking of objects. */ /* Number of entries in the struct pike_type hash-table. */ #define PIKE_TYPE_HASH_SIZE 32768 #ifdef PIKE_TYPE_DEBUG static int indent=0; #endif int max_correct_args; 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 *any_type_string; PMOD_EXPORT struct pike_type *weak_type_string; /* array|mapping|multiset|function */ #ifdef DEBUG_MALLOC struct pike_type_location *all_pike_type_locations = NULL; #endif /* DEBUG_MALLOC */ 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 *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; } } } 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) { ptrdiff_t len = pop_stack_mark(); struct pike_type *res; TYPE_STACK_DEBUG("paranoid_pop_type"); if (len > 0) { for (;len > 1; len--) { /* Get rid of excess junk. */ free_type(*(Pike_compiler->type_stackp--)); } res = *(Pike_compiler->type_stackp--); } else { add_ref(res = mixed_type_string); } type_stack_mark(); return res; }else{ return debug_pop_type(); } } char *get_name_of_type(TYPE_T t) { switch(t) { case T_ARRAY: return "array"; case T_FLOAT: return "float"; case T_FUNCTION: return "function"; case T_INT: return "int"; case T_SVALUE_PTR: return "svalue_ptr"; case T_OBJ_INDEX: return "obj_index"; case T_MAPPING: return "mapping"; case T_MULTISET: return "multiset"; case T_OBJECT: return "object"; case T_PROGRAM: return "program"; case T_STRING: return "string"; case T_TYPE: return "type"; case T_ZERO: return "zero"; case T_VOID: return "void"; case T_MIXED: return "mixed"; 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"; default: return "unknown"; } } #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 * FUNCTION type FUNCTION|MANY * MANY many type return type * RING type type * TUPLE type type * MAPPING index type value type * OR type type * AND type type * ARRAY type - * MULTISET type - * NOT type - * '0'-'9' - - * FLOAT - - * STRING - - * 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. * */ #define PIKE_TYPE_CHUNK 128 BLOCK_ALLOC(pike_type, PIKE_TYPE_CHUNK) 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; /* 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 */ 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 *)debug_malloc_pass(cdr); goto loop; case T_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: /* Free car */ t = (struct pike_type *)debug_malloc_pass(car); goto loop; case T_SCOPE: case T_ASSIGN: /* Free cdr */ t = (struct pike_type *)debug_malloc_pass(cdr); goto loop; case PIKE_T_NAME: free_string((struct pike_string *)car); t = (struct pike_type *)debug_malloc_pass(cdr); 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_STRING: 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 */ } } } /* Flags used as flag_method: */ #define PT_COPY_CAR 1 #define PT_COPY_CDR 2 #define PT_COPY_BOTH 3 #define PT_SET_MARKER 4 static inline struct pike_type *debug_mk_type(unsigned INT32 type, struct pike_type *car, struct pike_type *cdr, int flag_method) { unsigned INT32 hash = DO_NOT_WARN((unsigned INT32) ((ptrdiff_t)type*0x10204081)^ (0x8003*PTR_TO_INT(car))^ ~(0x10001*PTR_TO_INT(cdr))); unsigned INT32 index = hash % pike_type_hash_size; struct pike_type *t; /* 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:%u.\n", hash, index, pike_type_hash_size); } /* End PIKE_DEBUG code */ for(t = pike_type_hash[index]; t; t = t->next) { #ifdef PIKE_EXTRA_DEBUG if ((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 */ 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: /* 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_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_STRING: 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; } } debug_malloc_pass(t = alloc_pike_type()); 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_SET_MARKER) { t->flags = PT_FLAG_MARKER; } 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: debug_malloc_pass(car); break; case T_SCOPE: case T_ASSIGN: debug_malloc_pass(cdr); break; 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_STRING: 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 /* 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[PIKE_TYPE_STACK_SIZE]; struct pike_type **pike_type_mark_stack[PIKE_TYPE_STACK_SIZE/4]; 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; #if 0 if (min!=(INT32)min || max!=(INT32)max) Pike_fatal("push_int_type(): int outside INT32 range (sorry)" " (%"PRINTPIKEINT"d..%"PRINTPIKEINT"d)\n", min,max); #endif #endif #ifdef PIKE_DEBUG if (min > max) Pike_fatal("push_int_type(): Bad integer range:" " min:%"PRINTPIKEINT"d, max:%"PRINTPIKEINT"d.\n", min, max); #endif /* PIKE_DEBUG */ *(++Pike_compiler->type_stackp) = mk_type(T_INT, (void *)(ptrdiff_t)min, (void *)(ptrdiff_t)max, 0); TYPE_STACK_DEBUG("push_int_type"); } void debug_push_object_type(int flag, INT32 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_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"); } 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; } /* 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_ARRAY: case T_MULTISET: case T_NOT: case T_TYPE: case T_PROGRAM: /* 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_NAME: default: /* Should not occur. */ Pike_fatal("Unsupported argument to push_type().\n"); break; case T_FLOAT: case T_STRING: 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_SET_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) return; /* Probably due to an earlier error */ Pike_compiler->type_stackp--; #ifdef PIKE_DEBUG if ((top->type != expected) && (top->type != PIKE_T_NAME)) { 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: /* 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_STRING: 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_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"); } void debug_push_finished_type_with_markers(struct pike_type *type, struct pike_type **markers) { recurse: #if 0 fprintf(stderr, "push_finished_type_with_markers((%d[%x]),...)...\n", type->type, type->flags); #endif /* 0 */ if (!(type->flags & PT_FLAG_MARKER)) { /* No markers in this sub-tree */ #if 0 fprintf(stderr, "No markers in this subtree.\n"); #endif /* 0 */ push_finished_type(type); return; } if ((type->type >= '0') && (type->type <= '9')) { unsigned int m = type->type - '0'; if (markers[m]) { type = markers[m]; #if 0 fprintf(stderr, "Marker %d.\n", m); #endif /* 0 */ goto recurse; } else { push_type(T_ZERO); } TYPE_STACK_DEBUG("push_finished_type_with_markers"); return; } if (type->type == T_ASSIGN) { /* Strip assign */ #if 0 fprintf(stderr, "Assign to marker %"PRINTPTRDIFFT"d.\n", CAR_TO_INT(type); #endif /* 0 */ type = type->cdr; goto recurse; } if (type->type == PIKE_T_NAME) { /* Strip the name, since it won't be correct anymore. */ type = type->cdr; goto recurse; } /* FIXME: T_SCOPE */ if (type->cdr) { push_finished_type_with_markers(type->cdr, markers); } /* In all other cases type->car will be a valid node. */ push_finished_type_with_markers(type->car, markers); /* push_type has sufficient magic to recreate the type. */ push_type(type->type); 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_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) { int e; INT32 ret=0; for(e=0;e<(int)sizeof(INT32);e++) ret=(ret<<8) | EXTRACT_UCHAR(p+e); return ret; } 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: %d\n", len); } TYPE_STACK_DEBUG("pop_unfinished_type"); return *(Pike_compiler->type_stackp--); } /******/ 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)) { my_yyerror("Buffer overflow in parse_type(\"%s\") (limit %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 = -0x80000000; } 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 = 0x7fffffff; } 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(*s, "mplements ", 10)) { goto bad_type; } *s += 10; } while(ISSPACE(**s)) ++*s; no_is_implements: if( !**s ) goto bad_type; if (!strncmp(*s, "this_program", 12)) { id = Pike_compiler->new_program->id; *s += 12; } else { id = atoi( *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")) { 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 '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) 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"); } void simple_describe_type(struct pike_type *s) { if (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 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); 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) fprintf(stderr, "(%ld..%ld)",(long)min,(long)max); break; } case T_FLOAT: fprintf(stderr, "float"); break; case T_STRING: fprintf(stderr, "string"); 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; 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, "°"); 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); break; } } else { fprintf(stderr, "NULL"); } } #ifdef DEBUG_MALLOC void describe_all_types(void) { unsigned INT32 index; for(index = 0; index < pike_type_hash_size; index++) { struct pike_type *t; for (t = pike_type_hash[index]; t; t = t->next) { if (t->refs) { fprintf(stderr, "Type at 0x%p: ", t); simple_describe_type(t); fprintf(stderr, " (refs:%ld)\n", (long)t->refs); } } } } #endif /* DEBUG_MALLOC */ #endif static void low_describe_type(struct pike_type *t) { /**** 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_putchar('{'); my_putchar(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!=MIN_INT32 || max!=MAX_INT32) { char buffer[100]; 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) { char buffer[100]; sprintf(buffer,"object(%s %"PRINTPTRDIFFT"d)", t->car?"is":"implements", CDR_TO_INT(t)); my_strcat(buffer); }else{ my_strcat("object"); } break; case T_STRING: my_strcat("string"); 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 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; } 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(")°("); 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); } /******/ static int low_is_same_type(struct pike_type *a, struct pike_type *b) { return a == b; } 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: 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 int low_find_exact_type_match(struct pike_type *needle, struct pike_type *haystack, unsigned int separator) { while(haystack->type == separator) { if(low_find_exact_type_match(needle, haystack->car, separator)) return 1; haystack = haystack->cdr; } return low_is_same_type(needle, haystack); } static void very_low_or_pike_types(struct pike_type *to_push, struct pike_type *not_push) { while(to_push->type == T_OR) { very_low_or_pike_types(to_push->car, not_push); to_push = to_push->cdr; } /* FIXME: * this might use the 'le' operator */ if(!low_find_exact_type_match(to_push, not_push, T_OR)) { push_finished_type(to_push); push_type(T_OR); } } static void low_or_pike_types(struct pike_type *t1, struct pike_type *t2, int zero_implied) { if(!t1) { if(!t2) push_type(T_VOID); else push_finished_type(t2); } else if((!t2) || (t2->type == T_ZERO && zero_implied) ) { push_finished_type(t1); } else if (t1->type == T_ZERO && zero_implied) { push_finished_type(t2); } else if(t1->type == T_MIXED || t2->type == T_MIXED) { push_type(T_MIXED); } else if(t1->type == T_INT && t2->type == T_INT) { INT32 min1 = CAR_TO_INT(t1); INT32 max1 = CDR_TO_INT(t1); INT32 min2 = CAR_TO_INT(t2); INT32 max2 = CDR_TO_INT(t2); if ((max1 + 1 < min2) || (max2 + 1 < min1)) { /* No overlap. */ push_finished_type(t1); push_finished_type(t2); push_type(T_OR); } else { /* Overlap */ min1 = MINIMUM(min1, min2); max1 = MAXIMUM(max1, max2); push_int_type(min1, max1); } } else if (t1->type == T_SCOPE) { if (t2->type == T_SCOPE) { low_or_pike_types(t1->cdr, t2->cdr, zero_implied); if (t1->car > t2->car) push_scope_type(CAR_TO_INT(t1)); else push_scope_type(CAR_TO_INT(t2)); } else { low_or_pike_types(t1->cdr, t2, zero_implied); push_scope_type(CAR_TO_INT(t1)); } } else if (t2->type == T_SCOPE) { low_or_pike_types(t1, t2->cdr, zero_implied); push_scope_type(CAR_TO_INT(t2)); push_type(T_SCOPE); } else { push_finished_type(t1); very_low_or_pike_types(t2,t1); } } struct pike_type *or_pike_types(struct pike_type *a, struct pike_type *b, int zero_implied) { type_stack_mark(); low_or_pike_types(a,b,1 /*zero_implied*/); return pop_unfinished_type(); } static void very_low_and_pike_types(struct pike_type *to_push, struct pike_type *not_push) { while(to_push->type == T_AND) { very_low_and_pike_types(to_push->car, not_push); to_push = to_push->cdr; } if(!low_find_exact_type_match(to_push, not_push, T_AND)) { push_finished_type(to_push); push_type(T_AND); } } static void even_lower_and_pike_types(struct pike_type *t1, struct pike_type *t2) { while(t2->type == T_OR) { even_lower_and_pike_types(t1, t2->car); t2 = t2->cdr; } if (t1->type == t2->type) { if (t1->type == T_INT) { INT32 i1, i2; INT32 upper_bound, lower_bound; i1 = CDR_TO_INT(t1); i2 = CDR_TO_INT(t2); upper_bound = MINIMUM(i1,i2); i1 = CAR_TO_INT(t1); i2 = CAR_TO_INT(t2); lower_bound = MAXIMUM(i1,i2); if (upper_bound >= lower_bound) { push_int_type(lower_bound, upper_bound); push_type(T_OR); } } else { push_finished_type(t1); push_type(T_OR); } } } static int lower_and_pike_types(struct pike_type *t1, struct pike_type *t2) { int is_complex = 0; while(t1->type == T_OR) { is_complex |= lower_and_pike_types(t1->car, t2); t1 = t1->cdr; } switch(t1->type) { case T_ZERO: case T_VOID: break; case T_STRING: case T_FLOAT: case T_INT: even_lower_and_pike_types(t1, t2); break; default: return 1; } return is_complex; } static int low_and_push_complex_pike_type(struct pike_type *type) { int is_complex = 0; while(type->type == T_OR) { int new_complex; new_complex = low_and_push_complex_pike_type(type->car); if (new_complex) { if (is_complex) { push_type(T_OR); } else { is_complex = 1; } } type = type->cdr; } switch(type->type) { case T_VOID: case T_ZERO: case T_STRING: case T_FLOAT: case T_INT: /* Simple type. Already handled. */ break; default: push_finished_type(type); if (is_complex) { push_type(T_OR); } return 1; } return is_complex; } static void low_and_pike_types(struct pike_type *t1, struct pike_type *t2) { if(!t1 || t1->type == T_VOID || !t2 || t2->type == T_VOID) { push_type(T_VOID); } else if(t1->type == T_ZERO || t2->type == T_ZERO) { push_type(T_ZERO); } else if(t1->type == T_MIXED) { push_finished_type(t2); } else if(t2->type == T_MIXED) { push_finished_type(t1); } else if(t1->type == T_INT && t2->type == T_INT) { INT32 i1,i2; INT32 upper_bound, lower_bound; i1 = CDR_TO_INT(t1); i2 = CDR_TO_INT(t2); upper_bound = MINIMUM(i1,i2); i1 = CAR_TO_INT(t1); i2 = CAR_TO_INT(t2); lower_bound = MAXIMUM(i1,i2); if (upper_bound >= lower_bound) { push_int_type(lower_bound, upper_bound); } else { /* No overlap! */ /* FIXME: Warn? */ push_type(T_VOID); } } else if (t1->type == T_SCOPE) { if (t2->type == T_SCOPE) { low_and_pike_types(t1->cdr, t2->cdr); if (t1->car > t2->car) push_scope_type(CAR_TO_INT(t1)); else push_scope_type(CAR_TO_INT(t2)); } else { low_and_pike_types(t1->cdr, t2); push_scope_type(CAR_TO_INT(t1)); } } else if (t2->type == T_SCOPE) { low_and_pike_types(t1, t2->cdr); push_scope_type(CAR_TO_INT(t2)); } else if((t1->type == t2->type) && ((t1->type == T_STRING) || (t1->type == T_FLOAT))) { push_finished_type(t1); } else if(low_pike_types_le(t1, t2, 0, 0)) { push_finished_type(t1); } else if(low_pike_types_le(t2, t1, 0, 0)) { push_finished_type(t2); } else { push_type(T_ZERO); if (lower_and_pike_types(t1, t2)) { /* t1 contains complex types. */ if (low_and_push_complex_pike_type(t2)) { /* t2 also contains complex types. */ low_and_push_complex_pike_type(t1); push_type(T_AND); push_type(T_OR); } } /* push_finished_type(t1); */ /* very_low_and_pike_types(t2,t1); */ } } struct pike_type *and_pike_types(struct pike_type *a, struct pike_type *b) { type_stack_mark(); low_and_pike_types(a, b); return pop_unfinished_type(); } static struct pike_type *low_object_lfun_type(struct pike_type *t, short lfun) { struct program *p; int i; p = id_to_program(CDR_TO_INT(t)); if(!p) return 0; i=FIND_LFUN(p, lfun); if(i==-1) return 0; return ID_FROM_INT(p, i)->type; } /******/ /* * match two type strings, return zero if they don't match, and return * the part of 'a' that _did_ match if it did. */ static struct pike_type *low_match_types(struct pike_type *a, struct pike_type *b, int flags) #ifdef PIKE_TYPE_DEBUG { int e; char *s; static struct pike_type *low_match_types2(struct pike_type *a, struct pike_type *b, int flags); if (l_flag>2) { dynamic_buffer save_buf; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("low_match_types("); my_describe_type(a); my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); my_describe_type(b); my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); if (flags) { int f = 0; if (flags & A_EXACT) { my_strcat("A_EXACT"); f = 1; } if (flags & B_EXACT) { if (f) { my_strcat(" | "); } my_strcat("B_EXACT"); f = 1; } if (flags & NO_MAX_ARGS) { if (f) { my_strcat(" | "); } my_strcat("NO_MAX_ARGS"); f = 1; } if (flags & NO_SHORTCUTS) { if (f) { my_strcat(" | "); } my_strcat("NO_SHORTCUTS"); f = 1; } } else { my_strcat("0"); } my_strcat(");\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); indent++; } a = low_match_types2(a, b, flags); if (l_flag>2) { dynamic_buffer save_buf; indent--; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("= "); if(a) my_describe_type(a); else my_strcat("NULL"); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); } return a; } static struct pike_type *low_match_types2(struct pike_type *a, struct pike_type *b, int flags) #endif { int correct_args; struct pike_type *ret; if(a == b) return a; switch(a->type) { case T_AND: ret = low_match_types(a->car, b, flags); if(!ret) return 0; return low_match_types(a->cdr, b, flags); case T_OR: ret = low_match_types(a->car, b, flags); if(ret && !(flags & NO_SHORTCUTS)) return ret; if(ret) { low_match_types(a->cdr, b, flags); return ret; }else{ return low_match_types(a->cdr, b, flags); } case PIKE_T_RING: return low_match_types(a->car, b, flags); case PIKE_T_NAME: return low_match_types(a->cdr, b, flags); case T_NOT: if(low_match_types(a->car, b, (flags ^ B_EXACT ) | NO_MAX_ARGS)) return 0; return a; case T_ASSIGN: ret = low_match_types(a->cdr, b, flags); if(ret && (b->type != T_VOID)) { int m = CAR_TO_INT(a); struct pike_type *tmp; #ifdef PIKE_DEBUG if ((m < 0) || (m > 9)) { Pike_fatal("marker out of range: %d\n", m); } #endif /* PIKE_DEBUG */ type_stack_mark(); push_finished_type_with_markers(b, b_markers); tmp = pop_unfinished_type(); type_stack_mark(); low_or_pike_types(a_markers[m], tmp, 0); if(a_markers[m]) free_type(a_markers[m]); free_type(tmp); a_markers[m] = pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { dynamic_buffer save_buf; char *s; int e; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("a_markers["); my_putchar((char)(m+'0')); my_strcat("]="); my_describe_type(a_markers[m]); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); } #endif #ifdef PIKE_DEBUG if(a_markers[m]->type == m+'0') Pike_fatal("Cyclic type!\n"); #endif } return ret; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int m = a->type - '0'; if(a_markers[m]) { #ifdef PIKE_DEBUG if(a_markers[m]->type == a->type) Pike_fatal("Cyclic type!\n"); if(a_markers[m]->type == T_OR && a_markers[m]->car->type == a->type) Pike_fatal("Cyclic type!\n"); #endif return low_match_types(a_markers[m], b, flags); } else return low_match_types(mixed_type_string, b, flags); } } switch(b->type) { case T_AND: ret = low_match_types(a, b->car, flags); if(!ret) return 0; return low_match_types(a, b->cdr, flags); case T_OR: ret = low_match_types(a, b->car, flags); if(ret && !(flags & NO_SHORTCUTS)) return ret; if(ret) { low_match_types(a, b->cdr, flags); return ret; }else{ return low_match_types(a, b->cdr, flags); } case PIKE_T_RING: return low_match_types(a, b->car, flags); case PIKE_T_NAME: return low_match_types(a, b->cdr, flags); case T_NOT: if(low_match_types(a, b->car, (flags ^ A_EXACT ) | NO_MAX_ARGS)) return 0; return a; case T_ASSIGN: ret = low_match_types(a, b->cdr, flags); if(ret && (a->type != T_VOID)) { int m = CAR_TO_INT(b); struct pike_type *tmp; type_stack_mark(); push_finished_type_with_markers(a, a_markers); tmp=pop_unfinished_type(); type_stack_mark(); low_or_pike_types(b_markers[m], tmp, 0); if(b_markers[m]) free_type(b_markers[m]); free_type(tmp); b_markers[m] = pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { dynamic_buffer save_buf; char *s; int e; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("b_markers["); my_putchar((char)(m+'0')); my_strcat("]="); my_describe_type(b_markers[m]); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); } #endif #ifdef PIKE_DEBUG if(b_markers[m]->type == m+'0') Pike_fatal("Cyclic type!\n"); #endif } return ret; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int m = b->type - '0'; if(b_markers[m]) { #ifdef PIKE_DEBUG if(b_markers[m]->type == b->type) Pike_fatal("Cyclic type!\n"); #endif return low_match_types(a, b_markers[m], flags); } else return low_match_types(a, mixed_type_string, flags); } } /* 'mixed' matches anything */ if((a->type == T_ZERO || a->type == T_MIXED) && !(flags & (A_EXACT|B_EXACT)) && (b->type != T_VOID)) { #if 1 switch(b->type) { /* These types can contain sub-types */ case T_ARRAY: low_match_types(array_type_string, b, flags); break; case T_MAPPING: low_match_types(mapping_type_string, b, flags); break; case T_FUNCTION: case T_MANY: low_match_types(function_type_string, b, flags); break; case T_MULTISET: low_match_types(multiset_type_string, b, flags); break; } #endif return a; } if((b->type == T_ZERO || b->type == T_MIXED) && !(flags & (A_EXACT|B_EXACT)) && (a->type != T_VOID)) { #if 1 switch(a->type) { /* These types can contain sub-types */ case T_ARRAY: low_match_types(a, array_type_string, flags); break; case T_MAPPING: low_match_types(a, mapping_type_string, flags); break; case T_FUNCTION: case T_MANY: low_match_types(a, function_type_string, flags); break; case T_MULTISET: low_match_types(a, multiset_type_string, flags); break; } #endif return a; } /* Special cases (tm) */ switch(TWOT(a->type, b->type)) { case TWOT(T_PROGRAM, T_FUNCTION): case TWOT(T_FUNCTION, T_PROGRAM): case TWOT(T_PROGRAM, T_MANY): case TWOT(T_MANY, T_PROGRAM): /* FIXME: Should look at the sub-type of the program * to determine the prototype to use. */ return a; case TWOT(T_OBJECT, T_FUNCTION): case TWOT(T_OBJECT, T_MANY): { struct pike_type *s; if((s = low_object_lfun_type(a, LFUN_CALL))) return low_match_types(s, b, flags); if (flags & B_EXACT) { /* A function isn't an object */ return 0; } return a; } case TWOT(T_FUNCTION, T_OBJECT): case TWOT(T_MANY, T_OBJECT): { struct pike_type *s; if((s=low_object_lfun_type(b, LFUN_CALL))) return low_match_types(a, s, flags); if (flags & A_EXACT) { /* A function isn't an object */ return 0; } return a; } case TWOT(T_INT, T_ZERO): { if ((CAR_TO_INT(a) > 0) || (CDR_TO_INT(a) < 0)) { return 0; } return a; } case TWOT(T_ZERO, T_INT): { if ((CAR_TO_INT(b) > 0) || (CDR_TO_INT(b) < 0)) { return 0; } return a; } case TWOT(T_FUNCTION, T_FUNCTION): case TWOT(T_FUNCTION, T_MANY): case TWOT(T_MANY, T_FUNCTION): case TWOT(T_MANY, T_MANY): ret = a; correct_args=0; while ((a->type != T_MANY) || (b->type != T_MANY)) { struct pike_type *a_tmp, *b_tmp; a_tmp = a->car; if (a->type == T_FUNCTION) { a = a->cdr; } b_tmp = b->car; if (b->type == T_FUNCTION) { b = b->cdr; } if(!low_match_types(a_tmp, b_tmp, (flags | NO_MAX_ARGS) & ~(A_EXACT|B_EXACT))) return 0; if(++correct_args > max_correct_args) if(!(flags & NO_MAX_ARGS)) max_correct_args=correct_args; } /* check the 'many' type */ if(b->car->type != T_VOID && a->car->type != T_VOID) { if(!low_match_types(a->car, b->car, (flags | NO_MAX_ARGS) & ~(A_EXACT|B_EXACT))) return 0; } if(!(flags & NO_MAX_ARGS)) max_correct_args=0x7fffffff; /* check the returntype */ a = a->cdr; b = b->cdr; if ((b->type == T_VOID) && (a->type != T_VOID)) { /* Promote b to a function returning zero. */ if (!low_match_types(a, zero_type_string, flags & ~(A_EXACT|B_EXACT))) return 0; } else if ((a->type == T_VOID) && (b->type != T_VOID)) { /* Promote a to a function returning zero. */ if(!low_match_types(zero_type_string, b, flags & ~(A_EXACT|B_EXACT))) return 0; } else if(!low_match_types(a, b, flags & ~(A_EXACT|B_EXACT))) return 0; return ret; } if(a->type != b->type) return 0; ret=a; switch(a->type) { case T_MAPPING: if(!low_match_types(a->car, b->car, flags & ~(A_EXACT|B_EXACT))) return 0; if(!low_match_types(a->cdr, b->cdr, flags & ~(A_EXACT|B_EXACT))) return 0; break; case T_OBJECT: #if 0 if(a->cdr || b->cdr) { fprintf(stderr,"Type match1: "); stupid_describe_type(a,type_length(a)); fprintf(stderr,"Type match2: "); stupid_describe_type(b,type_length(b)); } #endif /* object(* 0) matches any object */ if(!a->cdr || !b->cdr) break; /* object(* x) =? object(* x) */ if (a->cdr == b->cdr) break; /* object(x *) =? object(x *) */ if(TEST_COMPAT(7,4) && a->car == b->car) { /* x? */ if(a->car) { /* object(1 x) =? object(1 x) */ return 0; }else{ /* object(0 *) =? object(0 *) */ break; } } /* Note: In Pike 7.4 and earlier the following was only done * when a->car != b->car. */ { struct program *ap,*bp; ap = id_to_program(CDR_TO_INT(a)); bp = id_to_program(CDR_TO_INT(b)); if(!ap || !bp) break; implements_mode = 0; if (!is_compatible(implements_a=ap,implements_b=bp)) return 0; } break; case T_INT: { INT32 amin = CAR_TO_INT(a); INT32 amax = CDR_TO_INT(a); INT32 bmin = CAR_TO_INT(b); INT32 bmax = CDR_TO_INT(b); if(amin > bmax || bmin > amax) return 0; break; } case T_PROGRAM: case T_TYPE: case T_MULTISET: case T_ARRAY: if(!low_match_types(a->car, b->car, flags & ~(A_EXACT|B_EXACT))) return 0; case T_FLOAT: case T_STRING: case T_ZERO: case T_VOID: case T_MIXED: break; default: Pike_fatal("Error in type string.\n"); } return ret; } /* * Check the partial ordering relation. * * mixed * * int float string program function object * * zero * * void * * Note that non-destructive operations are assumed. * ie it's assumed that calling a function(mapping(string|int:string|int):void) * with a mapping(int:int) won't change the type of the mapping after the * operation. */ static int low_pike_types_le(struct pike_type *a, struct pike_type *b, int array_cnt, unsigned int flags) #ifdef PIKE_TYPE_DEBUG { int e; char *s; static int low_pike_types_le2(struct pike_type *a, struct pike_type *b, int array_cnt, unsigned int flags); int res; char buf[50]; if (l_flag>2) { dynamic_buffer save_buf; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("low_pike_types_le("); my_describe_type(a); my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); my_describe_type(b); my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); sprintf(buf, "%d", array_cnt); my_strcat(buf); my_strcat(", "); sprintf(buf, "0x%08x", flags); my_strcat(buf); my_strcat(");\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); indent++; } res = low_pike_types_le2(a, b, array_cnt, flags); if (l_flag>2) { indent--; for(e=0;e<indent;e++) fprintf(stderr, " "); fprintf(stderr, "= %d\n", res); } return res; } static int low_pike_types_le2(struct pike_type *a, struct pike_type *b, int array_cnt, unsigned int flags) #endif /* PIKE_TYPE_DEBUG */ { int ret; recurse: #if 0 fprintf(stderr, "low_pike_types_le(%d, %d, %d, 0x%08x)\n", a->type, b->type, array_cnt, flags); #endif /* 0 */ if(a == b) return 1; switch(a->type) { case T_AND: /* OK if either of the parts is a subset. */ /* FIXME: What if b also contains an AND? */ ret = low_pike_types_le(a->car, b, array_cnt, flags); if(ret) return ret; a = a->cdr; goto recurse; case T_OR: /* OK, if both of the parts are a subset */ if (a->car->type == T_VOID) { /* Special case for T_VOID */ /* FIXME: Should probably be handled as T_ZERO. */ a = a->cdr; goto recurse; } else { ret = low_pike_types_le(a->car, b, array_cnt, flags); if (!ret) return 0; if (a->cdr->type == T_VOID) { /* Special case for T_VOID */ /* FIXME: Should probably be handled as T_ZERO. */ return 1; } else { a = a->cdr; goto recurse; } } case PIKE_T_RING: a = a->car; goto recurse; case PIKE_T_NAME: a = a->cdr; goto recurse; case T_NOT: if (b->type == T_NOT) { struct pike_type *tmp = a->car; a = b->car; b = tmp; array_cnt = -array_cnt; goto recurse; } if (a->car->type == T_NOT) { a = a->car->car; goto recurse; } if (low_pike_types_le(a->car, b, array_cnt, flags)) { return 0; } /* FIXME: This is wrong... */ return !low_pike_types_le(b, a->car, -array_cnt, flags); case T_ASSIGN: ret = low_pike_types_le(a->cdr, b, array_cnt, flags); if(ret && (b->type != T_VOID)) { int m = CAR_TO_INT(a); struct pike_type *tmp; int i; type_stack_mark(); push_finished_type_with_markers(b, b_markers); for(i=array_cnt; i > 0; i--) push_type(T_ARRAY); tmp=pop_unfinished_type(); type_stack_mark(); low_or_pike_types(a_markers[m], tmp, 0); if(a_markers[m]) free_type(a_markers[m]); free_type(tmp); a_markers[m] = pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { dynamic_buffer save_buf; char *s; int e; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("a_markers["); my_putchar((char)(m+'0')); my_strcat("]="); my_describe_type(a_markers[m]); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); } #endif } return ret; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int m = a->type - '0'; if(a_markers[m]) { a = a_markers[m]; } else { a = mixed_type_string; } goto recurse; } } switch(b->type) { case T_AND: /* OK, if a is a subset of both parts. */ ret = low_pike_types_le(a, b->car, array_cnt, flags); if(!ret) return 0; b = b->cdr; goto recurse; case T_OR: /* OK if a is a subset of either of the parts. */ ret=low_pike_types_le(a, b->car, array_cnt, flags); if (ret) return ret; b = b->cdr; goto recurse; case PIKE_T_RING: b = b->car; goto recurse; case PIKE_T_NAME: b = b->cdr; goto recurse; case T_NOT: if (b->car->type == T_NOT) { b = b->car->car; goto recurse; } if (low_pike_types_le(a, b->car, array_cnt, flags)) { return 0; } /* FIXME: This is wrong... */ return !low_pike_types_le(b->car, a, -array_cnt, flags); case T_ASSIGN: ret = low_pike_types_le(a, b->cdr, array_cnt, flags); if(ret && (a->type != T_VOID)) { int m = CAR_TO_INT(b); struct pike_type *tmp; int i; type_stack_mark(); push_finished_type_with_markers(a, a_markers); for(i = array_cnt; i < 0; i++) push_type(T_ARRAY); tmp=pop_unfinished_type(); type_stack_mark(); low_or_pike_types(b_markers[m], tmp, 0); if(b_markers[m]) free_type(b_markers[m]); free_type(tmp); b_markers[m]=pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { dynamic_buffer save_buf; char *s; int e; init_buf(&save_buf); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("b_markers["); my_putchar((char)(m+'0')); my_strcat("]="); my_describe_type(b_markers[m]); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf(&save_buf))); free(s); } #endif } return ret; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int m = b->type - '0'; if(b_markers[m]) { b = b_markers[m]; } else { b = mixed_type_string; } goto recurse; } } if ((array_cnt < 0) && (b->type == T_ARRAY)) { while (b->type == T_ARRAY) { b = b->car; if (!++array_cnt) break; } goto recurse; } else if ((array_cnt > 0) && (a->type == T_ARRAY)) { while (a->type == T_ARRAY) { a = a->car; if (!--array_cnt) break; } goto recurse; } /* NOTE: void only matches void. */ if (a->type == T_VOID) { /* void <= any_type */ if (array_cnt >= 0) { /* !array(void) */ if (!array_cnt && (b->type == T_VOID)) { return 1; } return 0; } } if (b->type == T_VOID) { if (array_cnt <= 0) { /* !array(void) */ return 0; } } if (b->type == T_MIXED) { /* any_type <= 'mixed' */ if (array_cnt <= 0) { /* !array(mixed) */ return 1; } } if (a->type == T_MIXED) { if (array_cnt >= 0) { /* !array(mixed) */ return 0; } } if (a->type == T_ZERO) { /* void <= zero <= any_type */ if (array_cnt >= 0) { /* !array(zero) */ return 1; } } if (b->type == T_ZERO) { if (array_cnt <= 0) { /* !array(zero) */ return 0; } } /* Special cases (tm) */ switch(TWOT(a->type, b->type)) { case TWOT(T_PROGRAM, T_FUNCTION): case TWOT(T_FUNCTION, T_PROGRAM): case TWOT(T_PROGRAM, T_MANY): case TWOT(T_MANY, T_PROGRAM): /* FIXME: Not really... Should check the return value. */ /* FIXME: Should also look at the subtype of the program. */ return 1; case TWOT(T_OBJECT, T_FUNCTION): case TWOT(T_OBJECT, T_MANY): { if((a = low_object_lfun_type(a, LFUN_CALL))) { goto recurse; } return 1; } case TWOT(T_FUNCTION, T_OBJECT): case TWOT(T_MANY, T_OBJECT): { if((b=low_object_lfun_type(b, LFUN_CALL))) { goto recurse; } return 1; } case TWOT(T_FUNCTION, T_ARRAY): case TWOT(T_MANY, T_ARRAY): { while (b->type == T_ARRAY) { b = b->car; array_cnt++; } goto recurse; } case TWOT(T_ARRAY, T_FUNCTION): case TWOT(T_ARRAY, T_MANY): { while (a->type == T_ARRAY) { a = a->car; array_cnt--; } goto recurse; } case TWOT(T_FUNCTION, T_FUNCTION): case TWOT(T_FUNCTION, T_MANY): case TWOT(T_MANY, T_FUNCTION): /* * function(A...:B) <= function(C...:D) iff C <= A && B <= D */ /* * function(:int) <= function(int:int) * function(int|string:int) <= function(int:int) * function(:int) <= function(:void) * function(string:int) != function(int:int) * function(int:int) != function(:int) * * FIXME: Enforcing of all required arguments? */ while((a->type != T_MANY) || (b->type != T_MANY)) { struct pike_type *a_tmp, *b_tmp; a_tmp = a->car; if (a->type == T_FUNCTION) { a = a->cdr; } b_tmp = b->car; if (b->type == T_FUNCTION) { b = b->cdr; } if (a_tmp->type != T_VOID) { if (!low_pike_types_le(b_tmp, a_tmp, 0, flags)) { return 0; } } } /* FALL_THROUGH */ case TWOT(T_MANY, T_MANY): /* check the 'many' type */ if ((a->car->type != T_VOID) && (b->car->type != T_VOID)) { if (!low_pike_types_le(b->car, a->car, 0, flags)) { return 0; } } a = a->cdr; b = b->cdr; /* check the returntype */ /* FIXME: Check array_cnt */ if ((b->type != T_VOID) && (a->type != T_VOID)) { if(!low_pike_types_le(a, b, array_cnt, flags)) return 0; } return 1; } if(a->type != b->type) return 0; if (array_cnt) return 0; switch(a->type) { case T_MAPPING: /* * mapping(A:B) <= mapping(C:D) iff A <= C && B <= D. */ if(!low_pike_types_le(a->car, b->car, 0, flags)) return 0; array_cnt = 0; a = a->cdr; b = b->cdr; goto recurse; case T_OBJECT: #if 0 if(a->cdr || b->cdr) { fprintf(stderr,"Type match1: "); stupid_describe_type(a,type_length(a)); fprintf(stderr,"Type match2: "); stupid_describe_type(b,type_length(b)); } #endif /* * object(0|1 x) <= object(0|1 0) * object(0|1 0) <=! object(0|1 !0) * object(1 x) <= object(0|1 x) * object(1 x) <= object(1 y) iff x == y * object(1 x) <= object(0 y) iff x implements y * Not WEAK_OBJECTS: * object(0 x) <= object(0 y) iff x implements y * WEAK_OBJECTS: * object(0 x) <= object(0 y) iff x is_compatible y */ /* object(* 0) matches any object */ if(!b->cdr) return 1; if(!a->cdr) return 0; /* The 'is' flag is now ignored. * /grubba 2003-11-11 */ if (TEST_COMPAT(7,4)) { if ((a->car || !b->car) && (a->cdr == b->cdr)) return 1; if (b->car) { return 0; } } else { if (a->cdr == b->cdr) return 1; } { struct program *ap = id_to_program(CDR_TO_INT(a)); struct program *bp = id_to_program(CDR_TO_INT(b)); if (!ap || !bp) { /* Shouldn't happen... */ /* fprintf(stderr, "ap:%p bp:%p\n", ap, bp); */ return 0; } if ((flags & LE_WEAK_OBJECTS) && (!TEST_COMPAT(7,4) || (!a->car))) { implements_mode = 0; /* fprintf(stderr, "is_compat(%p, %p)\n", ap, bp); */ return is_compatible(implements_a=ap, implements_b=bp); } implements_mode = 1; /* fprintf(stderr, "implements(%p, %p)\n", ap, bp); */ return implements(implements_a=ap, implements_b=bp); } break; case T_INT: { INT32 amin = CAR_TO_INT(a); INT32 amax = CDR_TO_INT(a); INT32 bmin = CAR_TO_INT(b); INT32 bmax = CDR_TO_INT(b); if(amin < bmin || amax > bmax) return 0; break; } case T_TYPE: case T_PROGRAM: case T_MULTISET: case T_ARRAY: a = a->car; b = b->car; array_cnt = 0; goto recurse; case T_FLOAT: case T_STRING: case T_ZERO: case T_VOID: case T_MIXED: break; default: Pike_fatal("Error in type string.\n"); } return 1; } /* * Check the function parameters. * Note: The difference between this function, and pike_types_le() * is the more lenient check for T_OR, and the handling of T_ARRAY. */ int strict_check_call(struct pike_type *fun_type, struct pike_type *arg_type) { while ((fun_type->type == T_OR) || (fun_type->type == T_ARRAY)) { if (fun_type->type == T_OR) { int res = strict_check_call(fun_type->car, arg_type); if (res) return res; fun_type = fun_type->cdr; } else { fun_type = fun_type->car; } } return low_pike_types_le(fun_type, arg_type, 0, 0); } /* * Check validity of soft-cast. * Note: This uses a weaker check of function arguments, since * people get confused otherwise. */ int check_soft_cast(struct pike_type *to, struct pike_type *from) { return low_pike_types_le(to, from, 0, LE_WEAK_OBJECTS); } /* * Return the return type from a function call. */ static int low_get_return_type(struct pike_type *a, struct pike_type *b) { int tmp; switch(a->type) { case T_OR: { struct pike_type *o1, *o2; o1=o2=0; type_stack_mark(); if(low_get_return_type(a->car, b)) { o1=pop_unfinished_type(); type_stack_mark(); } if(low_get_return_type(a->cdr, b)) o2=pop_unfinished_type(); else pop_stack_mark(); if(!o1 && !o2) return 0; low_or_pike_types(o1, o2, 0); if(o1) free_type(o1); if(o2) free_type(o2); return 1; } case T_AND: type_stack_mark(); tmp = low_get_return_type(a->car, b); type_stack_pop_to_mark(); if(!tmp) return 0; return low_get_return_type(a->cdr, b); case PIKE_T_RING: return low_get_return_type(a->car, b); case PIKE_T_NAME: return low_get_return_type(a->cdr, b); case T_ARRAY: tmp = low_get_return_type(a->car, b); if(!tmp) return 0; push_type(T_ARRAY); return 1; } a = low_match_types(a, b, NO_SHORTCUTS); if(a) { #if 0 if ((lex.pragmas & ID_STRICT_TYPES) && !low_pike_types_le(a, b, 0, 0)) { yywarning("Type mismatch"); } #endif /* 0 */ switch(a->type) { case T_FUNCTION: a = a->cdr; while(a->type == T_FUNCTION) { a = a->cdr; } /* FALL_THROUGH */ case T_MANY: a = a->cdr; push_finished_type_with_markers(a, a_markers ); return 1; case T_PROGRAM: push_finished_type(a->car); return 1; default: push_type(T_MIXED); return 1; } } return 0; } int match_types(struct pike_type *a, struct pike_type *b) { check_type_string(a); check_type_string(b); clear_markers(); return !!low_match_types(a, b, 0); } int pike_types_le(struct pike_type *a,struct pike_type *b) { check_type_string(a); check_type_string(b); clear_markers(); return low_pike_types_le(a, b, 0, 0); } #ifdef DEBUG_MALLOC #define low_index_type(X,Y,Z) ((struct pike_type *)debug_malloc_pass(debug_low_index_type((X),(Y),(Z)))) #else #define low_index_type debug_low_index_type #endif /* FIXME, add the index */ static struct pike_type *debug_low_index_type(struct pike_type *t, struct pike_type *index_type, node *n) { struct pike_type *tmp; struct program *p; switch(low_check_indexing(t, index_type, n)) { case 0: return 0; case -1: add_ref(zero_type_string); return zero_type_string; } while(t->type == PIKE_T_NAME) { t = t->cdr; } while(index_type->type == PIKE_T_NAME) { index_type = index_type->cdr; } switch(t->type) { case T_OBJECT: { p = id_to_program(CDR_TO_INT(t)); comefrom_int_index: if(p && n) { INT32 i; if(n->token == F_ARROW) { /* FIXME: make this stricter */ if((i=FIND_LFUN(p,LFUN_ARROW))!=-1) { /* FIXME: function_type_string should be replaced with something * derived from type_string */ if(i!=-1 && (tmp=check_call(function_type_string, ID_FROM_INT(p, i)->type, 0))) return tmp; add_ref(mixed_type_string); return mixed_type_string; } }else{ if((i=FIND_LFUN(p,LFUN_INDEX)) != -1) { /* FIXME: function_type_string should be replaced with something * derived from type_string */ if(i!=-1 && (tmp=check_call(function_type_string, ID_FROM_INT(p, i)->type, 0))) return tmp; add_ref(mixed_type_string); return mixed_type_string; } } if(CDR(n)->token == F_CONSTANT && CDR(n)->u.sval.type==T_STRING) { i = find_shared_string_identifier(CDR(n)->u.sval.u.string, p); if(i==-1) { add_ref(mixed_type_string); return mixed_type_string; }else{ add_ref(ID_FROM_INT(p, i)->type); return ID_FROM_INT(p, i)->type; } } } } default: add_ref(mixed_type_string); return mixed_type_string; case T_MIXED: if (lex.pragmas & ID_STRICT_TYPES) { yywarning("Indexing mixed."); } add_ref(mixed_type_string); return mixed_type_string; case T_INT: #ifdef AUTO_BIGNUM /* Don't force Gmp.mpz to be loaded here since this function * is called long before the master object is compiled... * /Hubbe */ p=get_auto_bignum_program_or_zero(); goto comefrom_int_index; #endif case T_ZERO: case T_TYPE: case PIKE_T_RING: case T_VOID: case T_FLOAT: return 0; case T_OR: { struct pike_type *a,*b; a = low_index_type(t->car, index_type, n); b = low_index_type(t->cdr, index_type,n); if(!b) return a; if(!a) return b; type_stack_mark(); low_or_pike_types(a,b,1); free_type(a); free_type(b); return pop_unfinished_type(); } case T_AND: /* FIXME: Shouldn't both branches be looked at? */ return low_index_type(t->cdr, index_type, n); case T_STRING: /* always int */ case T_MULTISET: /* always int */ add_ref(int_type_string); return int_type_string; case T_MAPPING: add_ref(t = t->cdr); return t; case T_ARRAY: { struct pike_type *a; if(low_pike_types_le(string_type_string, index_type, 0, 0) && (a = low_index_type(t->car, string_type_string, n))) { /* Possible to index the array with a string. */ type_stack_mark(); push_finished_type(a); free_type(a); push_type(T_ARRAY); if (low_match_types(int_type_string, index_type, 0)) { /* Also possible to index the array with an int. */ push_finished_type(t->car); push_type(T_OR); } return pop_unfinished_type(); } if (low_match_types(int_type_string, index_type, 0)) { /* Possible to index the array with an int. */ add_ref(t->car); return t->car; } /* Bad index type. */ return 0; } } } struct pike_type *index_type(struct pike_type *type, struct pike_type *index_type, node *n) { struct pike_type *t; clear_markers(); t = low_index_type(type, index_type, n); if(!t) { copy_pike_type(t, mixed_type_string); } return t; } #ifdef DEBUG_MALLOC #define low_range_type(X,Y,Z) ((struct pike_type *)debug_malloc_pass(debug_low_range_type((X),(Y),(Z)))) #else #define low_range_type debug_low_range_type #endif /* FIXME, add the index * * FIXME: Is the above fixme valid for this function too? */ static struct pike_type *debug_low_range_type(struct pike_type *t, struct pike_type *index1_type, struct pike_type *index2_type) { struct pike_type *tmp; struct program *p; while(t->type == PIKE_T_NAME) { t = t->cdr; } if (index1_type) while(index1_type->type == PIKE_T_NAME) { index1_type = index1_type->cdr; } if (index2_type) while(index2_type->type == PIKE_T_NAME) { index2_type = index2_type->cdr; } switch(t->type) { case T_OBJECT: { p = id_to_program(CDR_TO_INT(t)); if(p) { INT32 i; if((i = FIND_LFUN(p, LFUN_RANGE)) != -1) { struct pike_type *call_type = NULL; type_stack_mark(); push_finished_type(mixed_type_string); push_finished_type(void_type_string); push_type(T_OR); /* Return type */ push_finished_type(void_type_string); /* Many type */ push_type(T_MANY); push_int_type (INDEX_FROM_BEG, OPEN_BOUND); /* arg4 type */ push_type(T_FUNCTION); if (index2_type) /* arg3 type */ push_finished_type(index2_type); else push_type (T_ZERO); push_type(T_FUNCTION); push_int_type (INDEX_FROM_BEG, OPEN_BOUND); /* arg2 type */ push_type(T_FUNCTION); if (index1_type) /* arg1 type */ push_finished_type(index1_type); else push_type (T_ZERO); push_type(T_FUNCTION); call_type = pop_unfinished_type(); if((tmp = check_call(call_type, ID_FROM_INT(p, i)->type, 0))) { free_type(call_type); return tmp; } free_type(call_type); add_ref(mixed_type_string); return mixed_type_string; } if((i = FIND_LFUN(p, LFUN_INDEX)) != -1) { /* FIXME: Should check for a _sizeof operator if from-the-end * indexing is done. */ struct pike_type *call_type = NULL; /* FIXME: function_type_string should be replaced with something * derived from type_string */ type_stack_mark(); push_finished_type(mixed_type_string); push_finished_type(void_type_string); push_type(T_OR); /* Return type */ push_finished_type(void_type_string); /* Many type */ push_type(T_MANY); if (index2_type) /* arg2 type */ push_finished_type(index2_type); else push_int_type (MAX_INT_TYPE, MAX_INT_TYPE); push_type(T_FUNCTION); if (index1_type) /* arg1 type */ push_finished_type(index1_type); else push_type (T_ZERO); push_type(T_FUNCTION); call_type = pop_unfinished_type(); if((tmp = check_call(call_type, ID_FROM_INT(p, i)->type, 0))) { free_type(call_type); return tmp; } free_type(call_type); add_ref(mixed_type_string); return mixed_type_string; } yywarning("Ranging object without index operator."); return 0; } if (lex.pragmas & ID_STRICT_TYPES) { yywarning("Ranging generic object."); } add_ref(mixed_type_string); return mixed_type_string; } case T_MIXED: if (lex.pragmas & ID_STRICT_TYPES) { yywarning("Ranging mixed."); } add_ref(mixed_type_string); return mixed_type_string; case T_INT: case T_ZERO: case T_TYPE: case PIKE_T_RING: case T_VOID: case T_FLOAT: case T_MULTISET: case T_MAPPING: /* Illegal range operation. */ /* FIXME: Strict type warning. */ return 0; case T_ARRAY: case T_STRING: /* Check that the index types are compatible with int. */ { if (index1_type && !low_match_types(int_type_string, index1_type, 0)) { struct pike_string *s = describe_type(t); yywarning("Bad argument 1 to range operator on %s.", s->str); free_string(s); yyexplain_nonmatching_types(int_type_string, index1_type, YYTE_IS_WARNING); /* Bad index1 type. */ return 0; } if (index2_type && !low_match_types(int_type_string, index2_type, 0)) { struct pike_string *s = describe_type(t); yywarning("Bad argument 2 to range operator on %s.", s->str); free_string(s); yyexplain_nonmatching_types(int_type_string, index2_type, YYTE_IS_WARNING); /* Bad index2 type. */ return 0; } } /* FALLTHROUGH */ default: /* Identity. */ add_ref(t); return t; case T_OR: { struct pike_type *a,*b; a = low_range_type(t->car, index1_type, index2_type); b = low_range_type(t->cdr, index1_type, index2_type); if(!b) return a; if(!a) return b; type_stack_mark(); low_or_pike_types(a,b,1); free_type(a); free_type(b); return pop_unfinished_type(); } case T_AND: /* FIXME: Shouldn't both branches be looked at? */ return low_range_type(t->cdr, index1_type, index2_type); } } struct pike_type *range_type(struct pike_type *type, struct pike_type *index1_type, struct pike_type *index2_type) { struct pike_type *t; clear_markers(); t = low_range_type(type, index1_type, index2_type); if(!t) { yyerror("Invalid range operation."); copy_pike_type(t, type); } return t; } static struct pike_type *low_array_value_type(struct pike_type *arr_t) { struct pike_type *res = NULL; struct pike_type *sub_t; while (arr_t->type == T_OR) { sub_t = low_array_value_type(arr_t->car); arr_t = arr_t->cdr; if (sub_t) { if (res) { struct pike_type *new = or_pike_types(res, sub_t, 1); free_type(res); free_type(sub_t); res = new; } else { res = sub_t; } } } if (arr_t->type != T_ARRAY) return res; copy_pike_type(sub_t, arr_t->car); if (res) { struct pike_type *new = or_pike_types(res, sub_t, 1); free_type(res); free_type(sub_t); return new; } return sub_t; } struct pike_type *array_value_type(struct pike_type *array_type) { struct pike_type *t = low_array_value_type(array_type); if (!t) { copy_pike_type(t, mixed_type_string); } return t; } #ifdef DEBUG_MALLOC #define low_key_type(X,Y) ((struct pike_type *)debug_malloc_pass(debug_low_key_type((X),(Y)))) #else #define low_key_type debug_low_key_type #endif /* FIXME, add the index */ static struct pike_type *debug_low_key_type(struct pike_type *t, node *n) { switch(t->type) { case T_OBJECT: { struct program *p = id_to_program(CDR_TO_INT(t)); if(p && n) { if(n->token == F_ARROW) { if(FIND_LFUN(p,LFUN_ARROW)!=-1 || FIND_LFUN(p,LFUN_ASSIGN_ARROW)!=-1) { add_ref(mixed_type_string); return mixed_type_string; } }else{ if(FIND_LFUN(p,LFUN_INDEX) != -1 || FIND_LFUN(p,LFUN_ASSIGN_INDEX) != -1) { add_ref(mixed_type_string); return mixed_type_string; } } } add_ref(string_type_string); return string_type_string; } default: add_ref(mixed_type_string); return mixed_type_string; case T_VOID: case T_ZERO: case T_TYPE: case PIKE_T_RING: case T_FLOAT: case T_INT: return 0; case T_OR: { struct pike_type *a,*b; a = low_key_type(t->car, n); b = low_key_type(t->cdr, n); if(!b) return a; if(!a) return b; type_stack_mark(); low_or_pike_types(a,b,1); free_type(a); free_type(b); return pop_unfinished_type(); } case T_AND: /* FIXME: Shouldn't this look at both branches? */ return low_key_type(t->cdr, n); case PIKE_T_NAME: return low_key_type(t->cdr, n); case T_ARRAY: case T_STRING: /* always int */ add_ref(int_type_string); return int_type_string; case T_MAPPING: case T_MULTISET: copy_pike_type(t, t->car); return t; } } struct pike_type *key_type(struct pike_type *type, node *n) { struct pike_type *t; clear_markers(); t = low_key_type(type,n); if(!t) { copy_pike_type(t, mixed_type_string); } return t; } static int low_check_indexing(struct pike_type *type, struct pike_type *index_type, node *n) { switch(type->type) { case T_OR: return low_check_indexing(type->car, index_type, n) || low_check_indexing(type->cdr, index_type, n); case T_AND: return low_check_indexing(type->car, index_type, n) && low_check_indexing(type->cdr, index_type, n); case T_NOT: return low_check_indexing(type->car, index_type, n) != 1; case PIKE_T_NAME: return low_check_indexing(type->cdr, index_type, n); case T_ARRAY: if(low_match_types(string_type_string, index_type, 0) && low_check_indexing(type->car, index_type, n)) return 1; case T_STRING: return !!low_match_types(int_type_string, index_type, 0); case T_OBJECT: { struct program *p = id_to_program(CDR_TO_INT(type)); if(p) { if(n->token == F_ARROW) { if(FIND_LFUN(p,LFUN_ARROW)!=-1 || FIND_LFUN(p,LFUN_ASSIGN_ARROW)!=-1) return 1; }else{ if(FIND_LFUN(p,LFUN_INDEX)!=-1 || FIND_LFUN(p,LFUN_ASSIGN_INDEX)!=-1) return 1; } return !!low_match_types(string_type_string, index_type,0); }else{ return 1; } } case T_MULTISET: case T_MAPPING: /* FIXME: Why -1 and not 0? */ return low_match_types(type->car, index_type, 0) ? 1 : -1; #ifdef AUTO_BIGNUM case T_INT: #endif case T_PROGRAM: return !!low_match_types(string_type_string, index_type, 0); case T_MIXED: return 1; default: return 0; } } int check_indexing(struct pike_type *type, struct pike_type *index_type, node *n) { check_type_string(type); check_type_string(index_type); return low_check_indexing(type, index_type, n); } static int low_count_arguments(struct pike_type *q) { int num=0, num2; switch(q->type) { case T_OR: num = low_count_arguments(q->car); num2 = low_count_arguments(q->cdr); if(num<0 && num2>0) return num; if(num2<0 && num>0) return num2; if(num2<0 && num<0) return ~num>~num2?num:num2; return num>num2?num:num2; case T_AND: num = low_count_arguments(q->car); num2 = low_count_arguments(q->cdr); if(num<0 && num2>0) return num2; if(num2<0 && num>0) return num; if(num2<0 && num<0) return ~num<~num2?num:num2; return num<num2?num:num2; case PIKE_T_NAME: return low_count_arguments(q->cdr); default: return 0x7fffffff; case T_FUNCTION: while(q->type == T_FUNCTION) { num++; q = q->cdr; } /* FALL_THROUGH */ case T_MANY: q = q->car; if(q->type != T_VOID) return ~num; return num; } } /* Count the number of arguments for a funciton type. * return -1-n if the function can take number of arguments * >= n (varargs) */ int count_arguments(struct pike_type *s) { check_type_string(s); return low_count_arguments(s); } static int low_minimum_arguments(struct pike_type *q) { int num; switch(q->type) { case T_OR: case T_AND: return MAXIMUM(low_count_arguments(q->car), low_count_arguments(q->cdr)); default: return 0; case PIKE_T_NAME: return low_minimum_arguments(q->cdr); case T_FUNCTION: num = 0; while(q->type == T_FUNCTION) { if(low_match_types(void_type_string, q->car, B_EXACT)) return num; num++; q = q->cdr; } return num; case T_MANY: return 0; } } /* Count the minimum number of arguments for a funciton type. */ int minimum_arguments(struct pike_type *s) { int ret; check_type_string(s); ret = low_minimum_arguments(s); #if 0 fprintf(stderr,"minimum_arguments("); simple_describe_type(s); fprintf(stderr," ) -> %d\n",ret); #endif return ret; } struct pike_type *check_call(struct pike_type *args, struct pike_type *type, int strict) { check_type_string(args); check_type_string(type); clear_markers(); type_stack_mark(); max_correct_args=0; if(low_get_return_type(type, args)) { if (strict) { if (!strict_check_call(type, args)) { struct pike_string *type_t = describe_type(type); struct pike_type *func_zero_type; MAKE_CONSTANT_TYPE(func_zero_type, tFuncV(tNone,tZero,tMix)); if (!low_pike_types_le(type, func_zero_type, 0, 0)) { yywarning("Calling non-function value."); yywarning("Type called: %s", type_t->str); } else { struct pike_string *arg_t = describe_type(args); yywarning("Arguments not strictly compatible."); yywarning("Expected: %s", type_t->str); yywarning("Got : %s", arg_t->str); free_string(arg_t); } free_type(func_zero_type); free_string(type_t); } } return pop_unfinished_type(); }else{ pop_stack_mark(); return 0; } } /* NOTE: type loses a reference. */ struct pike_type *new_check_call(node *fun, int *argno, struct pike_type *type, node *args) { struct pike_type *tmp_type = NULL; while (args && (args->token == F_ARG_LIST)) { type = new_check_call(fun, argno, type, CAR(args)); args = CDR(args); } if (!args) { return type; } switch(type->type) { case T_NOT: break; case T_FUNCTION: if (!pike_types_le(args->type, type->car)) { if (!match_types(args->type, type->car)) { /* Bad arg */ } else { /* Not strict arg */ } } copy_pike_type(tmp_type, type->cdr); free_type(type); type = tmp_type; (*argno)++; break; case T_MANY: if (!pike_types_le(args->type, type->car)) { if (!match_types(args->type, type->car)) { /* Bad arg */ } else { /* Not strict arg */ } } (*argno)++; break; } return type; } struct pike_type *zzap_function_return(struct pike_type *a, INT32 id) { switch(a->type) { case T_OR: { struct pike_type *ar, *br, *ret=0; ar = zzap_function_return(a->car, id); br = zzap_function_return(a->cdr, id); if(ar && br) ret = or_pike_types(ar, br, 0); if(ar) free_type(ar); if(br) free_type(br); return ret; } case T_FUNCTION: case T_MANY: { int nargs=0; type_stack_mark(); while(a->type == T_FUNCTION) { push_finished_type(a->car); nargs++; a = a->cdr; } push_finished_type(a->car); push_object_type(1, id); push_reverse_type(T_MANY); while(nargs-- > 0) { push_reverse_type(T_FUNCTION); } return pop_unfinished_type(); } case T_ARRAY: return zzap_function_return(a->car, id); case PIKE_T_NAME: return zzap_function_return(a->cdr, id); case T_MIXED: /* I wonder when this occurrs, but apparently it does... */ /* FIXME: */ type_stack_mark(); push_object_type(1, id); push_type(T_VOID); push_type(T_MIXED); push_type(T_OR); push_type(T_MANY); return pop_unfinished_type(); } /* This error is bogus /Hubbe Pike_fatal("zzap_function_return() called with unexpected value: %d\n", EXTRACT_UCHAR(a)); */ return NULL; } struct pike_type *get_type_of_svalue(struct svalue *s) { struct pike_type *ret; switch(s->type) { case T_FUNCTION: if(s->subtype == FUNCTION_BUILTIN) { copy_pike_type(ret, s->u.efun->type); }else{ struct program *p; p=s->u.object->prog; if(!p) { copy_pike_type(ret, zero_type_string); }else{ copy_pike_type(ret, ID_FROM_INT(p,s->subtype)->type); } } return ret; case T_ARRAY: { struct pike_type *arg_type; struct array *a = s->u.array; #if 0 int i; /* FIXME: Circular structures? */ copy_pike_type(arg_type, zero_type_string); for (i = 0; i < a->size; i++) { struct pike_type *tmp1 = get_type_of_svalue(a->item+i); struct pike_type *tmp2 = or_pike_types(arg_type, tmp1, 1); free_type(arg_type); free_type(tmp1); arg_type = tmp2; } #else /* !0 */ if (a->size) copy_pike_type(arg_type, mixed_type_string); else copy_pike_type(arg_type, zero_type_string); #endif /* 0 */ type_stack_mark(); push_finished_type(arg_type); free_type(arg_type); push_type(s->type); return pop_unfinished_type(); } case T_MULTISET: type_stack_mark(); if (multiset_sizeof(s->u.multiset)) { push_type(T_MIXED); } else { push_type(T_ZERO); } push_type(T_MULTISET); return pop_unfinished_type(); case T_MAPPING: type_stack_mark(); if (m_sizeof(s->u.mapping)) { push_type_field(s->u.mapping->data->val_types); push_type_field(s->u.mapping->data->ind_types); } else { push_type(T_ZERO); push_type(T_ZERO); } push_type(T_MAPPING); return pop_unfinished_type(); case T_OBJECT: type_stack_mark(); if(s->u.object->prog) { #ifdef AUTO_BIGNUM if(is_bignum_object(s->u.object)) { push_int_type(MIN_INT32, MAX_INT32); } else #endif { push_object_type(1, s->u.object->prog->id); } }else{ /* Destructed object */ push_type(T_ZERO); } return pop_unfinished_type(); case T_INT: if(s->u.integer) { type_stack_mark(); /* Fixme, check that the integer is in range of MIN_INT32 .. MAX_INT32! */ push_int_type(s->u.integer, s->u.integer); return pop_unfinished_type(); }else{ copy_pike_type(ret, zero_type_string); return ret; } case T_PROGRAM: { /* FIXME: An alternative would be to push program(object(1,p->id)). */ struct pike_type *a; struct pike_string *tmp; int id; if(s->u.program->identifiers) { id=FIND_LFUN(s->u.program,LFUN_CREATE); if(id>=0) { a = ID_FROM_INT(s->u.program, id)->type; if((a = zzap_function_return(a, s->u.program->id))) return a; tmp=describe_type(ID_FROM_INT(s->u.program, id)->type); /* yywarning("Failed to zzap function return for type: %s.", tmp->str);*/ free_string(tmp); } if (!(s->u.program->flags & PROGRAM_PASS_1_DONE)) { /* We haven't added all identifiers in s->u.program yet, * so we might find a create() later. */ if((a = zzap_function_return(function_type_string, s->u.program->id))) return a; } } else { if((a = zzap_function_return(function_type_string, s->u.program->id))) return a; } type_stack_mark(); push_object_type(1, s->u.program->id); push_type(T_VOID); push_type(T_MANY); return pop_unfinished_type(); } case T_TYPE: type_stack_mark(); push_finished_type(s->u.type); push_type(T_TYPE); return pop_unfinished_type(); default: type_stack_mark(); push_type(s->type); return pop_unfinished_type(); } } static struct pike_type *low_object_type_to_program_type(struct pike_type *obj_t) { struct pike_type *res = NULL; struct pike_type *sub; struct svalue sval; int id; while(obj_t->type == T_OR) { sub = low_object_type_to_program_type(obj_t->car); if (!sub) { if (res) { free_type(res); } return NULL; } if (res) { struct pike_type *tmp = or_pike_types(res, sub, 1); free_type(res); free_type(sub); res = tmp; } else { res = sub; } obj_t = obj_t->cdr; } sval.type = T_PROGRAM; if ((obj_t->type != T_OBJECT) || (!(id = CDR_TO_INT(obj_t))) || (!(sval.u.program = id_to_program(id))) || (!(sub = get_type_of_svalue(&sval)))) { if (res) { free_type(res); } return NULL; } /* FIXME: obj_t->car should propagate to the return-type in sub. */ if (res) { struct pike_type *tmp = or_pike_types(res, sub, 1); free_type(res); free_type(sub); return tmp; } return sub; } /* Used by fix_object_program_type() */ struct pike_type *object_type_to_program_type(struct pike_type *obj_t) { return low_object_type_to_program_type(obj_t); } int type_may_overload(struct pike_type *type, int lfun) { switch(type->type) { case T_ASSIGN: return type_may_overload(type->cdr, lfun); case T_FUNCTION: case T_MANY: case T_ARRAY: /* might want to check for `() */ default: return 0; case PIKE_T_NAME: return type_may_overload(type->cdr, lfun); case PIKE_T_RING: return type_may_overload(type->car, lfun); case T_OR: return type_may_overload(type->car, lfun) || type_may_overload(type->cdr, lfun); case T_AND: return type_may_overload(type->car, lfun) && type_may_overload(type->cdr, lfun); case T_NOT: return !type_may_overload(type->car, lfun); case T_MIXED: return 1; case T_OBJECT: { struct program *p = id_to_program(CDR_TO_INT(type)); if(!p) return 1; return FIND_LFUN(p, lfun)!=-1; } } } void yyexplain_nonmatching_types(struct pike_type *type_a, struct pike_type *type_b, int flags) { DECLARE_CYCLIC(); implements_a=0; implements_b=0; implements_mode=0; match_types(type_a, type_b); #if 0 if(!(implements_a && implements_b && type_a->str[0]==T_OBJECT && type_b->str[0]==T_OBJECT)) #endif /* 0 */ { struct pike_string *s1, *s2; s1 = describe_type(type_a); s2 = describe_type(type_b); if(flags & YYTE_IS_WARNING) { yywarning("Expected: %s",s1->str); yywarning("Got : %s",s2->str); }else{ my_yyerror("Expected: %S", s1); my_yyerror("Got : %S", s2); } free_string(s1); free_string(s2); } /* Protect against circularities. */ if (BEGIN_CYCLIC(type_a, type_b)) { END_CYCLIC(); return; } SET_CYCLIC_RET(1); if(implements_a && implements_b) { if (implements_mode) { yyexplain_not_implements(implements_a, implements_b, flags); } else { yyexplain_not_compatible(implements_a, implements_b, flags); } } END_CYCLIC(); } /******/ #ifdef DEBUG_MALLOC #define low_make_pike_type(T,C) ((struct pike_type *)debug_malloc_pass(debug_low_make_pike_type(T,C))) #define low_make_function_type(T,C) ((struct pike_type *)debug_malloc_pass(debug_low_make_function_type(T,C))) #else /* !DEBUG_MALLOC */ #define low_make_pike_type debug_low_make_pike_type #define low_make_function_type debug_low_make_function_type #endif /* DEBUG_MALLOC */ static struct pike_type *debug_low_make_pike_type(unsigned char *type_string, unsigned char **cont); static struct pike_type *debug_low_make_function_type(unsigned char *type_string, unsigned char **cont) { struct pike_type *tmp; if (*type_string == T_MANY) { tmp = low_make_pike_type(type_string+1, cont); return mk_type(T_MANY, tmp, low_make_pike_type(*cont, cont), PT_COPY_BOTH); } tmp = low_make_pike_type(type_string, cont); return mk_type(T_FUNCTION, tmp, low_make_function_type(*cont, cont), PT_COPY_BOTH); } static struct pike_type *debug_low_make_pike_type(unsigned char *type_string, unsigned char **cont) { unsigned INT32 type; struct pike_type *tmp; switch(type = *type_string) { case T_SCOPE: case T_ASSIGN: if ((type_string[1] < '0') || (type_string[1] > '9')) { Pike_fatal("low_make_pike_type(): Bad marker: %d\n", type_string[1]); } return mk_type(type, (void *)(ptrdiff_t)(type_string[1] - '0'), low_make_pike_type(type_string+2, cont), PT_COPY_CDR); case T_FUNCTION: /* Multiple ordered values. */ /* FIXME: */ return low_make_function_type(type_string+1, cont); case T_TUPLE: case T_MAPPING: case PIKE_T_RING: /* Order dependant */ tmp = low_make_pike_type(type_string+1, cont); return mk_type(type, tmp, low_make_pike_type(*cont, cont), PT_COPY_BOTH); case T_OR: case T_AND: /* Order independant */ /* FIXME: */ tmp = low_make_pike_type(type_string+1, cont); return mk_type(type, tmp, low_make_pike_type(*cont, cont), PT_COPY_BOTH); case T_ARRAY: case T_MULTISET: case T_TYPE: case T_NOT: case T_PROGRAM: /* Single type */ return mk_type(type, low_make_pike_type(type_string+1, cont), NULL, PT_COPY_CAR); case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': /* Marker type */ *cont = type_string+1; return mk_type(type, NULL, NULL, PT_SET_MARKER); case T_FLOAT: case T_STRING: case T_MIXED: case T_VOID: case T_ZERO: case PIKE_T_UNKNOWN: /* Leaf type */ *cont = type_string+1; return mk_type(type, NULL, NULL, 0); case T_INT: *cont = type_string + 9; /* 2*sizeof(INT32) + 1 */ return mk_type(T_INT, (void *)(ptrdiff_t)extract_type_int(type_string+1), (void *)(ptrdiff_t)extract_type_int(type_string+5), 0); case T_OBJECT: *cont = type_string + 6; /* 1 + sizeof(INT32) + 1 */ return mk_type(T_OBJECT, (void *)(ptrdiff_t)(type_string[1]), (void *)(ptrdiff_t)extract_type_int(type_string+2), 0); case PIKE_T_NAME: { int size_shift = type_string[1] & 0x3; struct pike_string *str; INT32 bytes; /* bit 0 & 1: size_shift * bit 2 ==> little endian. * * The loops check the lsb first, since it's most likely to * be non-zero. */ switch(type_string[1]) { case 0: case 4: bytes = strlen(type_string+2); break; case 1: for(bytes=0; ; bytes+=2) if(!type_string[bytes+3] && !type_string[bytes+2]) break; break; case 5: for(bytes=0; ; bytes+=2) if(!type_string[bytes+2] && !type_string[bytes+3]) break; break; case 2: for(bytes=0; ; bytes+=4) if(!type_string[bytes+5] && !type_string[bytes+4] && !type_string[bytes+3] && !type_string[bytes+2]) break; break; case 6: for(bytes=0; ; bytes+=4) if(!type_string[bytes+2] && !type_string[bytes+3] && !type_string[bytes+4] && !type_string[bytes+5]) break; break; default: /* will not happen? */ bytes=0; Pike_fatal("unexpected case in make_pike_type (%d)\n", type_string[1]); } str = begin_wide_shared_string(bytes>>size_shift, size_shift); MEMCPY(str->str, type_string+2, bytes); if (size_shift && #if (PIKE_BYTEORDER == 1234) /* Little endian */ !(type_string[1] & 0x04) #else /* PIKE_BYTEORDER != 1234 */ /* Big endian */ (type_string[1] & 0x04) #endif /* PIKE_BYTEORDER == 1234 */ ) { int len; char tmp; if (size_shift == 1) { for (len = 0; len < bytes; len += 2) { tmp = str->str[len]; str->str[len] = str->str[len+1]; str->str[len+1] = tmp; } } else { for (len = 0; len < bytes; len += 4) { tmp = str->str[len]; str->str[len] = str->str[len+3]; str->str[len+3] = tmp; tmp = str->str[len+1]; str->str[len+1] = str->str[len+2]; str->str[len+2] = tmp; } } } return mk_type(PIKE_T_NAME, (void *)end_shared_string(str), low_make_pike_type(type_string + 2 + bytes + (1<<size_shift), cont), PT_COPY_CDR); } default: Pike_fatal("compile_type_string(): Error in type string %d.\n", type); /* NOT_REACHED */ break; } /* NOT_REACHED */ return NULL; } /* Make a pike-type from a serialized (old-style) type. */ struct pike_type *debug_make_pike_type(const char *serialized_type) { unsigned char *dummy; return low_make_pike_type((unsigned char *)serialized_type, &dummy); } int pike_type_allow_premature_toss(struct pike_type *type) { again: #if 0 fprintf(stderr, "pike_type_allow_premature_toss(): Type: %d\n", type->type); #endif /* 0 */ switch(type->type) { case T_NOT: return !pike_type_allow_premature_toss(type->car); case T_OBJECT: case T_MIXED: case T_FUNCTION: case T_MANY: return 0; case PIKE_T_NAME: case T_SCOPE: case T_ASSIGN: type = type->cdr; goto again; case PIKE_T_RING: type = type->car; goto again; case T_OR: case T_MAPPING: if(!pike_type_allow_premature_toss(type->car)) return 0; type = type->cdr; goto again; case T_AND: /* FIXME: Should probably look at both branches. */ type = type->cdr; goto again; case T_ARRAY: case T_MULTISET: type = type->car; goto again; case T_PROGRAM: case T_TYPE: case T_INT: case T_FLOAT: case T_STRING: case T_VOID: return 1; default: Pike_fatal("pike_type_allow_premature_toss: Unknown type code (%d)\n", ((unsigned char *)type)[-1]); /* NOT_REACHED */ return 0; } } static void low_type_to_string(struct pike_type *t) { recurse: switch(t->type) { case T_ARRAY: case T_MULTISET: case T_TYPE: case T_NOT: case T_PROGRAM: my_putchar(t->type); /* FALL_THROUGH */ case PIKE_T_NAME: t = t->car; goto recurse; case PIKE_T_RING: case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: my_putchar(t->type); low_type_to_string(t->car); t = t->cdr; goto recurse; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case T_STRING: case T_FLOAT: case T_ZERO: case T_VOID: case T_MIXED: my_putchar(t->type); break; case T_OBJECT: { INT32 i; my_putchar(T_OBJECT); i = (INT32)CAR_TO_INT(t); my_putchar( i ); i = (INT32)CDR_TO_INT(t); if( i > 65535 ) i = 0; /* Not constant between recompilations */ my_putchar((i >> 24) & 0xff); my_putchar((i >> 16) & 0xff); my_putchar((i >> 8) & 0xff); my_putchar(i & 0xff); } break; case T_INT: { INT32 i; my_putchar(T_INT); i = (INT32)CAR_TO_INT(t); my_putchar((i >> 24) & 0xff); my_putchar((i >> 16) & 0xff); my_putchar((i >> 8) & 0xff); my_putchar(i & 0xff); i = (INT32)CDR_TO_INT(t); my_putchar((i >> 24) & 0xff); my_putchar((i >> 16) & 0xff); my_putchar((i >> 8) & 0xff); my_putchar(i & 0xff); } break; case T_FUNCTION: case T_MANY: my_putchar(T_FUNCTION); while(t->type == T_FUNCTION) { low_type_to_string(t->car); t = t->cdr; } my_putchar(T_MANY); low_type_to_string(t->car); t = t->cdr; goto recurse; case T_SCOPE: case T_ASSIGN: my_putchar(t->type); my_putchar('0' + CAR_TO_INT(t)); t = t->cdr; goto recurse; default: Pike_error("low_type_to_string(): Unsupported node: %d\n", t->type); break; } } struct pike_string *type_to_string(struct pike_type *t) { dynamic_buffer save_buf; init_buf(&save_buf); low_type_to_string(t); return free_buf(&save_buf); } void init_types(void) { /* Initialize hashtable here. */ pike_type_hash = (struct pike_type **)xalloc(sizeof(struct pike_type *) * PIKE_TYPE_HASH_SIZE); MEMSET(pike_type_hash, 0, sizeof(struct pike_type *) * PIKE_TYPE_HASH_SIZE); pike_type_hash_size = PIKE_TYPE_HASH_SIZE; init_pike_type_blocks(); string_type_string = CONSTTYPE(tString); int_type_string = CONSTTYPE(tInt); object_type_string = CONSTTYPE(tObj); program_type_string = CONSTTYPE(tPrg(tObj)); float_type_string = CONSTTYPE(tFloat); mixed_type_string = CONSTTYPE(tMix); array_type_string = CONSTTYPE(tArray); multiset_type_string = CONSTTYPE(tMultiset); mapping_type_string = CONSTTYPE(tMapping); function_type_string = CONSTTYPE(tFunction); type_type_string = CONSTTYPE(tType(tMix)); void_type_string = CONSTTYPE(tVoid); zero_type_string = CONSTTYPE(tZero); any_type_string = CONSTTYPE(tOr(tVoid,tMix)); weak_type_string = CONSTTYPE(tOr4(tArray,tMultiset,tMapping, tFuncV(tNone,tZero,tOr(tMix,tVoid)))); } void cleanup_pike_types(void) { #ifdef DEBUG_MALLOC struct pike_type_location *t = all_pike_type_locations; while(t) { free_type(t->t); t = t->next; } #endif /* DEBUG_MALLOC */ free_type(string_type_string); free_type(int_type_string); free_type(float_type_string); free_type(function_type_string); free_type(object_type_string); free_type(program_type_string); free_type(array_type_string); free_type(multiset_type_string); free_type(mapping_type_string); free_type(type_type_string); free_type(mixed_type_string); free_type(void_type_string); free_type(zero_type_string); free_type(any_type_string); free_type(weak_type_string); } void cleanup_pike_type_table(void) { /* Free the hashtable here. */ if (pike_type_hash) { free(pike_type_hash); /* Don't do this, it messes up stuff... * * It's needed for dmalloc to survive. */ pike_type_hash = NULL; } /* Don't do this, it messes up stuff... * * It's needed for dmalloc to survive. */ pike_type_hash_size = 0; #ifdef DO_PIKE_CLEANUP free_all_pike_type_blocks(); #endif /* DO_PIKE_CLEANUP */ }

pike.git/ src/ pike_types.c > d96f38f849d0e2a67fa8dbc744a8d44634987bb8 [Annotate]