pike.git/src/pike_types.c:da77e22a687e4b299c33a12d54a8afeb4b8d5a0c

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3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 /*\ ||| This file a part of Pike, and is copyright by Fredrik Hubinette ||| Pike is distributed as GPL (General Public License) ||| See the files COPYING and DISCLAIMER for more information. \*/ /**/ #include "global.h" RCSID("$Id: pike_types.c,v 1.139 2000/09/08 17:06:29 hubbe Exp $"); #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 "error.h" #include "las.h" #include "language.h" #include "lex.h" #include "pike_memory.h" #include "bignum.h" #include "main.h" #include "opcodes.h" #define PIKE_TYPE_DEBUG int max_correct_args; static void internal_parse_type(char **s); static ptrdiff_t type_length(char *t); static int low_pike_types_le(char *a, char *b, int array_cnt, unsigned int flags); static int low_check_indexing(char *type, char *index_type, node *n); #define TWOT(X,Y) (((X) << 8)+(Y)) #define EXTRACT_TWOT(X,Y) TWOT(EXTRACT_UCHAR(X), EXTRACT_UCHAR(Y)) /* * basic types are represented by just their value in a string * basic type are string, type, int, float, object and program * arrays are coded like by the value T_ARRAY followed by the * data type, if the type is not known it is T_MIXED, ie: * T_ARRAY <data type> * mappings are followed by two arguments, the first is the type * for the indices, and the second is the type of the data, ie: * T_MAPPING <indice type> <data type> * multiset works similarly to arrays. * functions are _very_ special: * they are coded like this: * T_FUNCTION <arg type> <arg type> ... <arg type> T_MANY <arg type> <return type> * note that the type after T_MANY can be T_VOID * T_MIXED matches anything except T_VOID * T_UNKNOWN only matches T_MIXED and T_UNKNOWN * objects are coded thus: * T_OBJECT <0/1> <program_id> * ^ * 0 means 'implements' * 1 means 'is' (aka 'clone of') * Integers are encoded as: * T_INT <min> <max> * Everything except T_VOID matches T_ZERO. */ PMOD_EXPORT struct pike_string *string_type_string; PMOD_EXPORT struct pike_string *int_type_string; PMOD_EXPORT struct pike_string *float_type_string; PMOD_EXPORT struct pike_string *function_type_string; PMOD_EXPORT struct pike_string *object_type_string; PMOD_EXPORT struct pike_string *program_type_string; PMOD_EXPORT struct pike_string *array_type_string; PMOD_EXPORT struct pike_string *multiset_type_string; PMOD_EXPORT struct pike_string *mapping_type_string; PMOD_EXPORT struct pike_string *type_type_string; PMOD_EXPORT struct pike_string *mixed_type_string; PMOD_EXPORT struct pike_string *void_type_string; PMOD_EXPORT struct pike_string *zero_type_string; PMOD_EXPORT struct pike_string *any_type_string; PMOD_EXPORT struct pike_string *weak_type_string; /* array|mapping|multiset|function */ static struct pike_string *a_markers[10],*b_markers[10]; static struct program *implements_a; static struct program *implements_b; static void clear_markers(void) { unsigned int e; for(e=0;e<NELEM(a_markers);e++) { if(a_markers[e]) { free_string(a_markers[e]); a_markers[e]=0; } if(b_markers[e]) { free_string(b_markers[e]); b_markers[e]=0; } } } #ifdef PIKE_DEBUG void check_type_string(struct pike_string *s) { if(debug_findstring(s) != s) fatal("Type string not shared.\n"); if(type_length(s->str) != s->len) { stupid_describe_type(s->str,s->len); fatal("Length of type is wrong. (should be %ld, is %ld)\n", PTRDIFF_T_TO_LONG(type_length(s->str)), PTRDIFF_T_TO_LONG(s->len)); } } #endif void init_types(void) { string_type_string = CONSTTYPE(tString); int_type_string = CONSTTYPE(tInt); object_type_string = CONSTTYPE(tObj); program_type_string = CONSTTYPE(tPrg); 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); 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)))); } static ptrdiff_t type_length(char *t) { char *q=t; one_more_type: switch(EXTRACT_UCHAR(t++)) { default: fatal("error in type string %d.\n",EXTRACT_UCHAR(t-1)); /*NOTREACHED*/ break; case T_SCOPE: case T_ASSIGN: t++; goto one_more_type; case T_FUNCTION: while(EXTRACT_UCHAR(t)!=T_MANY) t+=type_length(t); /* skip arguments */ t++; case T_TUPLE: case T_MAPPING: case T_OR: case T_AND: t+=type_length(t); case T_ARRAY: case T_MULTISET: case T_NOT: goto one_more_type; 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_TYPE: case T_PROGRAM: case T_MIXED: case T_VOID: case T_ZERO: case T_UNKNOWN: break; case T_INT: t+=sizeof(INT32)*2; break; case T_OBJECT: t++; t+=sizeof(INT32); break; } return t-q; } unsigned char type_stack[PIKE_TYPE_STACK_SIZE]; unsigned char *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) fatal("Type mark stack underflow\n"); return Pike_compiler->type_stackp - *Pike_compiler->pike_type_mark_stackp; } void pop_type_stack(void) { Pike_compiler->type_stackp--; if(Pike_compiler->type_stackp<type_stack) fatal("Type stack underflow\n"); } void type_stack_pop_to_mark(void) { Pike_compiler->type_stackp-=pop_stack_mark(); #ifdef PIKE_DEBUG if(Pike_compiler->type_stackp<type_stack) fatal("Type stack underflow\n"); #endif } void type_stack_reverse(void) { ptrdiff_t a; a=pop_stack_mark(); reverse((char *)(Pike_compiler->type_stackp-a),a,1); } void push_type_int(INT32 i) { ptrdiff_t e; for(e = 0; e < (ptrdiff_t)sizeof(i); e++) push_type(DO_NOT_WARN((unsigned char)((i>>(e*8)) & 0xff))); } void push_type_int_backwards(INT32 i) { int e; for(e=(int)sizeof(i);e-->0;) push_type( (i>>(e*8)) & 0xff ); } 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; } void push_unfinished_type(char *s) { ptrdiff_t e; e=type_length(s); for(e--;e>=0;e--) push_type(s[e]); } static void push_unfinished_type_with_markers(char *s, struct pike_string **am) { int d,e,c; ptrdiff_t len=type_length(s); type_stack_mark(); for(e=0;e<len;e++) { switch(c=EXTRACT_UCHAR(s+e)) { #if 1 case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if(am[c-'0']) { push_finished_type_backwards(am[c-'0']); }else{ push_type(T_ZERO); } break; #endif case T_ASSIGN: #if 1 e++; #else push_type(c); push_type(EXTRACT_UCHAR(s+ ++e)); #endif break; case T_INT: push_type(c); for(d=0;d<(int)sizeof(INT32)*2;d++) push_type(EXTRACT_UCHAR(s+ ++e)); break; case T_OBJECT: push_type(c); for(d=0;d<(int)sizeof(INT32)+1;d++) push_type(EXTRACT_UCHAR(s+ ++e)); break; default: push_type(c); } } type_stack_reverse(); } void push_finished_type(struct pike_string *type) { ptrdiff_t e; check_type_string(type); for(e=type->len-1;e>=0;e--) push_type(type->str[e]); } void push_finished_type_backwards(struct pike_string *type) { int e; check_type_string(type); MEMCPY(Pike_compiler->type_stackp, type->str, type->len); Pike_compiler->type_stackp+=type->len; } struct pike_string *debug_pop_unfinished_type(void) { ptrdiff_t len, e; struct pike_string *s; len=pop_stack_mark(); s=begin_shared_string(len); Pike_compiler->type_stackp-=len; MEMCPY(s->str, Pike_compiler->type_stackp, len); reverse(s->str, len, 1); s=end_shared_string(s); check_type_string(s); return s; } struct pike_string *debug_pop_type(void) { struct pike_string *s; s=pop_unfinished_type(); type_stack_mark(); return s; } struct pike_string *debug_compiler_pop_type(void) { if(Pike_compiler->num_parse_error) { /* This could be fixed to check if the type * is correct and then return it, I just didn't feel * like writing the checking code today. / Hubbe */ type_stack_pop_to_mark(); type_stack_mark(); reference_shared_string(mixed_type_string); return mixed_type_string; }else{ struct pike_string *s; s=pop_unfinished_type(); type_stack_mark(); return s; } } static void internal_parse_typeA(char **_s) { char buf[80]; unsigned int len; unsigned char **s = (unsigned char **)_s; while(ISSPACE(**s)) ++*s; len=0; for(len=0;isidchar(EXTRACT_UCHAR(s[0]+len));len++) { if(len>=sizeof(buf)) error("Buffer overflow in parse_type\n"); 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; min=STRTOL((char *)*s,(char **)s,0); while(ISSPACE(**s)) ++*s; if(s[0][0]=='.' && s[0][1]=='.') s[0]+=2; else error("Missing .. in integer type.\n"); while(ISSPACE(**s)) ++*s; max=STRTOL((char *)*s,(char **)s,0); while(ISSPACE(**s)) ++*s; if(**s != ')') error("Missing ')' in integer range.\n"); ++*s; push_type_int(max); push_type_int(min); }else{ push_type_int(MAX_INT32); push_type_int(MIN_INT32); } push_type(T_INT); break; } goto bad_type; case 'f': if(!strcmp(buf,"function")) { while(ISSPACE(**s)) ++*s; if(**s == '(') { ++*s; while(ISSPACE(**s)) ++*s; type_stack_mark(); while(1) { if(**s == ':') { push_type(T_MANY); push_type(T_VOID); break; } type_stack_mark(); type_stack_mark(); type_stack_mark(); internal_parse_type(_s); type_stack_reverse(); if(**s==',') { ++*s; while(ISSPACE(**s)) ++*s; } else if(s[0][0]=='.' && s[0][1]=='.' && s[0][2]=='.') { type_stack_reverse(); push_type(T_MANY); type_stack_reverse(); *s+=3; while(ISSPACE(**s)) ++*s; if(**s != ':') error("Missing ':' after ... in function type.\n"); break; } pop_stack_mark(); pop_stack_mark(); } ++*s; type_stack_mark(); internal_parse_type(_s); /* return type */ type_stack_reverse(); if(**s != ')') error("Missing ')' in function type.\n"); ++*s; type_stack_reverse(); }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); } push_type(T_FUNCTION); break; } if(!strcmp(buf,"float")) { push_type(T_FLOAT); break; } goto bad_type; case 'o': if(!strcmp(buf,"object")) { push_type_int(0); push_type(0); push_type(T_OBJECT); break; } goto bad_type; case 'p': if(!strcmp(buf,"program")) { 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 == '(') { type_stack_mark(); ++*s; type_stack_mark(); internal_parse_type(_s); type_stack_reverse(); if(**s != ',') error("Expecting ','.\n"); ++*s; type_stack_mark(); internal_parse_type(_s); type_stack_reverse(); if(**s != ')') error("Expecting ')'.\n"); ++*s; type_stack_reverse(); }else{ push_type(T_MIXED); push_type(T_MIXED); } push_type(T_TUPLE); break; } if(!strcmp(buf,"type")) { 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 == '(') { type_stack_mark(); ++*s; type_stack_mark(); internal_parse_type(_s); type_stack_reverse(); if(**s != ':') error("Expecting ':'.\n"); ++*s; type_stack_mark(); internal_parse_type(_s); type_stack_reverse(); if(**s != ')') error("Expecting ')'.\n"); ++*s; type_stack_reverse(); }else{ push_type(T_MIXED); push_type(T_MIXED); } push_type(T_MAPPING); break; } if(!strcmp(buf,"multiset")) { while(ISSPACE(**s)) ++*s; if(**s == '(') { ++*s; internal_parse_type(_s); if(**s != ')') error("Expecting ')'.\n"); ++*s; }else{ push_type(T_MIXED); } push_type(T_MULTISET); break; } goto bad_type; case 'u': if(!strcmp(buf,"unknown")) { push_type(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 != ')') error("Expecting ')'.\n"); ++*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_type(buf[0]); push_type(T_ASSIGN); }else{ push_type(buf[0]); } break; } default: bad_type: error("Couldn't parse type. (%s)\n",buf); } while(ISSPACE(**s)) ++*s; } static void internal_parse_typeB(char **s) { while(ISSPACE(**((unsigned char **)s))) ++*s; switch(**s) { case '!': ++*s; internal_parse_typeB(s); push_type(T_NOT); break; case '(': ++*s; internal_parse_type(s); while(ISSPACE(**((unsigned char **)s))) ++*s; if(**s != ')') error("Expecting ')'.\n"); ++*s; break; default: internal_parse_typeA(s); } } static void internal_parse_typeCC(char **s) { internal_parse_typeB(s); while(ISSPACE(**((unsigned char **)s))) ++*s; while(**s == '*') { ++*s; while(ISSPACE(**((unsigned char **)s))) ++*s; push_type(T_ARRAY); } } static void internal_parse_typeC(char **s) { type_stack_mark(); type_stack_mark(); internal_parse_typeCC(s); type_stack_reverse(); while(ISSPACE(**((unsigned char **)s))) ++*s; if(**s == '&') { ++*s; type_stack_mark(); internal_parse_typeC(s); type_stack_reverse(); type_stack_reverse(); push_type(T_AND); }else{ type_stack_reverse(); } } static void internal_parse_type(char **s) { internal_parse_typeC(s); while(ISSPACE(**((unsigned char **)s))) ++*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_string *parse_type(char *s) { struct pike_string *ret; #ifdef PIKE_DEBUG unsigned char *ts=Pike_compiler->type_stackp; unsigned char **ptms=Pike_compiler->pike_type_mark_stackp; #endif type_stack_mark(); internal_parse_type(&s); if( *s ) fatal("Extra junk at end of type definition.\n"); ret=pop_unfinished_type(); #ifdef PIKE_DEBUG if(ts!=Pike_compiler->type_stackp || ptms!=Pike_compiler->pike_type_mark_stackp) fatal("Type stack whacked in parse_type.\n"); #endif return ret; } #ifdef PIKE_DEBUG void stupid_describe_type(char *a, ptrdiff_t len) { ptrdiff_t e; for(e=0;e<len;e++) { if(e) printf(" "); 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': printf("%c",EXTRACT_UCHAR(a+e)); break; case T_SCOPE: printf("scope"); break; case T_TUPLE: printf("tuple"); break; case T_ASSIGN: printf("="); break; case T_INT: { INT32 min=extract_type_int(a+e+1); INT32 max=extract_type_int(a+e+1+sizeof(INT32)); printf("int"); if(min!=MIN_INT32 || max!=MAX_INT32) printf("(%ld..%ld)",(long)min,(long)max); e+=sizeof(INT32)*2; break; } case T_FLOAT: printf("float"); break; case T_STRING: printf("string"); break; case T_TYPE: printf("type"); break; case T_PROGRAM: printf("program"); break; case T_OBJECT: printf("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: printf("function"); break; case T_ARRAY: printf("array"); break; case T_MAPPING: printf("mapping"); break; case T_MULTISET: printf("multiset"); break; case T_UNKNOWN: printf("unknown"); break; case T_MANY: printf("many"); break; case T_OR: printf("or"); break; case T_AND: printf("and"); break; case T_NOT: printf("not"); break; case T_VOID: printf("void"); break; case T_ZERO: printf("zero"); break; case T_MIXED: printf("mixed"); break; default: printf("%d",EXTRACT_UCHAR(a+e)); break; } } printf("\n"); } void simple_describe_type(struct pike_string *s) { stupid_describe_type(s->str,s->len); } #endif char *low_describe_type(char *t) { switch(EXTRACT_UCHAR(t++)) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': my_putchar(EXTRACT_UCHAR(t-1)); break; case T_ASSIGN: my_putchar('('); my_putchar(EXTRACT_UCHAR(t++)); my_putchar('='); t=low_describe_type(t); my_putchar(')'); break; case T_SCOPE: my_putchar('{'); my_putchar(EXTRACT_UCHAR(t++)); my_putchar(','); t = low_describe_type(t); my_putchar('}'); break; case T_TUPLE: my_putchar('['); t = low_describe_type(t); my_putchar(','); t = low_describe_type(t); 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 T_UNKNOWN: my_strcat("unknown"); break; case T_INT: { INT32 min=extract_type_int(t); INT32 max=extract_type_int(t+sizeof(INT32)); my_strcat("int"); if(min!=MIN_INT32 || max!=MAX_INT32) { char buffer[100]; sprintf(buffer,"(%ld..%ld)",(long)min,(long)max); my_strcat(buffer); } t+=sizeof(INT32)*2; break; } case T_FLOAT: my_strcat("float"); break; case T_PROGRAM: my_strcat("program"); break; case T_OBJECT: if(extract_type_int(t+1)) { char buffer[100]; sprintf(buffer,"object(%s %ld)",*t?"is":"implements", (long)extract_type_int(t+1)); my_strcat(buffer); }else{ my_strcat("object"); } t+=sizeof(INT32)+1; /* Prog id */ break; case T_STRING: my_strcat("string"); break; case T_TYPE: my_strcat("type"); break; case T_FUNCTION: { int s; my_strcat("function"); if(EXTRACT_UCHAR(t) == T_MANY && ((EXTRACT_UCHAR(t+1) == T_ZERO && EXTRACT_UCHAR(t+2) == T_OR && ((EXTRACT_UCHAR(t+3) == T_MIXED && EXTRACT_UCHAR(t+4) == T_VOID) || (EXTRACT_UCHAR(t+4) == T_MIXED && EXTRACT_UCHAR(t+3) == T_VOID))) || (EXTRACT_UCHAR(t+1) == T_OR && ((EXTRACT_UCHAR(t+2) == T_ZERO && EXTRACT_UCHAR(t+3) == T_VOID) || (EXTRACT_UCHAR(t+3) == T_ZERO && EXTRACT_UCHAR(t+2) == T_VOID)) && EXTRACT_UCHAR(t+4) == T_OR && ((EXTRACT_UCHAR(t+5) == T_MIXED && EXTRACT_UCHAR(t+6) == T_VOID) || (EXTRACT_UCHAR(t+6) == T_MIXED && EXTRACT_UCHAR(t+5) == T_VOID))))) { /* done */ if (EXTRACT_UCHAR(t+1) == T_ZERO) { /* function(zero...:mixed|void) */ t += 5; } else { /* function(zero|void...mixed|void) */ t += 7; } } else { my_strcat("("); s=0; while(EXTRACT_UCHAR(t) != T_MANY) { if(s++) my_strcat(", "); t=low_describe_type(t); } t++; if(EXTRACT_UCHAR(t) == T_VOID) { t++; }else{ if(s++) my_strcat(", "); t=low_describe_type(t); my_strcat(" ..."); } my_strcat(" : "); t=low_describe_type(t); my_strcat(")"); } break; } case T_ARRAY: my_strcat("array"); if(EXTRACT_UCHAR(t)==T_MIXED) { t++; }else{ my_strcat("("); t=low_describe_type(t); my_strcat(")"); } break; case T_MULTISET: my_strcat("multiset"); if(EXTRACT_UCHAR(t)!=T_MIXED) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); }else{ t++; } break; case T_NOT: my_strcat("!"); if (EXTRACT_UCHAR(t) > T_NOT) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); } else { t=low_describe_type(t); } break; case T_OR: if (EXTRACT_UCHAR(t) > T_OR) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); } else { t=low_describe_type(t); } my_strcat(" | "); if (EXTRACT_UCHAR(t) > T_OR) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); } else { t=low_describe_type(t); } break; case T_AND: if (EXTRACT_UCHAR(t) > T_AND) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); } else { t=low_describe_type(t); } my_strcat(" & "); if (EXTRACT_UCHAR(t) > T_AND) { my_strcat("("); t=low_describe_type(t); my_strcat(")"); } else { t=low_describe_type(t); } break; case T_MAPPING: my_strcat("mapping"); if(EXTRACT_UCHAR(t)==T_MIXED && EXTRACT_UCHAR(t+1)==T_MIXED) { t+=2; }else{ my_strcat("("); t=low_describe_type(t); my_strcat(":"); t=low_describe_type(t); my_strcat(")"); } break; default: { char buf[20]; my_strcat("unknown code("); sprintf(buf, "%d", EXTRACT_UCHAR(t-1)); my_strcat(buf); my_strcat(")"); break; } } return t; } struct pike_string *describe_type(struct pike_string *type) { check_type_string(type); if(!type) return make_shared_string("mixed"); init_buf(); low_describe_type(type->str); return free_buf(); } static int low_is_same_type(char *a, char *b) { if(type_length(a) != type_length(b)) return 0; return !MEMCMP(a,b,type_length(a)); } static TYPE_T low_compile_type_to_runtime_type(char *t) { TYPE_T tmp; switch(EXTRACT_UCHAR(t)) { case T_OR: t++; tmp=low_compile_type_to_runtime_type(t); if(tmp == low_compile_type_to_runtime_type(t+type_length(t))) return tmp; 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: return low_compile_type_to_runtime_type(t+2); 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 EXTRACT_UCHAR(t); } } TYPE_T compile_type_to_runtime_type(struct pike_string *s) { return low_compile_type_to_runtime_type(s->str); } static int low_find_exact_type_match(char *needle, char *haystack, int separator) { while(EXTRACT_UCHAR(haystack) == separator) { haystack++; if(low_find_exact_type_match(needle, haystack, separator)) return 1; haystack+=type_length(haystack); } return low_is_same_type(needle, haystack); } static void very_low_or_pike_types(char *to_push, char *not_push) { while(EXTRACT_UCHAR(to_push)==T_OR) { to_push++; very_low_or_pike_types(to_push, not_push); to_push+=type_length(to_push); } /* FIXME: * this might use the 'le' operator */ if(!low_find_exact_type_match(to_push, not_push, T_OR)) { push_unfinished_type(to_push); push_type(T_OR); } } static void low_or_pike_types(char *t1, char *t2, int zero_implied) { if(!t1) { if(!t2) push_type(T_VOID); else push_unfinished_type(t2); } else if((!t2) || (EXTRACT_UCHAR(t2) == T_ZERO && zero_implied) ) { push_unfinished_type(t1); } else if (EXTRACT_UCHAR(t1) == T_ZERO && zero_implied) { push_unfinished_type(t2); } else if(EXTRACT_UCHAR(t1)==T_MIXED || EXTRACT_UCHAR(t2)==T_MIXED) { push_type(T_MIXED); } else if(EXTRACT_UCHAR(t1)==T_INT && EXTRACT_UCHAR(t2)==T_INT) { /* FIXME: * This should only be done if the ranges are * overlapping or adjecant to each other. /Hubbe */ INT32 i1,i2; i1=extract_type_int(t1+1+sizeof(INT32)); i2=extract_type_int(t2+1+sizeof(INT32)); push_type_int(MAXIMUM(i1,i2)); i1=extract_type_int(t1+1); i2=extract_type_int(t2+1); push_type_int(MINIMUM(i1,i2)); push_type(T_INT); } else if (EXTRACT_UCHAR(t1) == T_SCOPE) { if (EXTRACT_UCHAR(t2) == T_SCOPE) { low_or_pike_types(t1+2, t2+2, zero_implied); if (EXTRACT_UCHAR(t1+1) > EXTRACT_UCHAR(t2+1)) push_type(EXTRACT_UCHAR(t1+1)); else push_type(EXTRACT_UCHAR(t2+1)); } else { low_or_pike_types(t1+2, t2, zero_implied); push_type(EXTRACT_UCHAR(t1+1)); } push_type(T_SCOPE); } else if (EXTRACT_UCHAR(t2) == T_SCOPE) { low_or_pike_types(t1, t2+2, zero_implied); push_type(EXTRACT_UCHAR(t2+1)); push_type(T_SCOPE); } else { push_unfinished_type(t1); very_low_or_pike_types(t2,t1); } } static void medium_or_pike_types(struct pike_string *a, struct pike_string *b, int zero_implied) { low_or_pike_types( a ? a->str : 0 , b ? b->str : 0 , zero_implied); } struct pike_string *or_pike_types(struct pike_string *a, struct pike_string *b, int zero_implied) { type_stack_mark(); medium_or_pike_types(a,b,1 /*zero_implied*/); return pop_unfinished_type(); } static void very_low_and_pike_types(char *to_push, char *not_push) { while(EXTRACT_UCHAR(to_push)==T_AND) { to_push++; very_low_and_pike_types(to_push, not_push); to_push+=type_length(to_push); } if(!low_find_exact_type_match(to_push, not_push, T_AND)) { push_unfinished_type(to_push); push_type(T_AND); } } static void even_lower_and_pike_types(char *t1, char *t2) { while(EXTRACT_UCHAR(t2) == T_OR) { t2++; even_lower_and_pike_types(t1, t2); t2 += type_length(t2); } if (EXTRACT_UCHAR(t1) == EXTRACT_UCHAR(t2)) { if (EXTRACT_UCHAR(t1) == T_INT) { INT32 i1,i2; INT32 upper_bound,lower_bound; i1=extract_type_int(t1+1+sizeof(INT32)); i2=extract_type_int(t2+1+sizeof(INT32)); upper_bound = MINIMUM(i1,i2); i1=extract_type_int(t1+1); i2=extract_type_int(t2+1); lower_bound = MAXIMUM(i1,i2); if (upper_bound >= lower_bound) { push_type_int(upper_bound); push_type_int(lower_bound); push_type(T_INT); push_type(T_OR); } } else { push_unfinished_type(t1); push_type(T_OR); } } } static int lower_and_pike_types(char *t1, char *t2) { int is_complex = 0; while(EXTRACT_UCHAR(t1)==T_OR) { t1++; is_complex |= lower_and_pike_types(t1, t2); t1 += type_length(t1); } switch(EXTRACT_UCHAR(t1)) { case T_ZERO: case T_VOID: break; case T_PROGRAM: case T_STRING: case T_TYPE: 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(char *type) { int is_complex = 0; while(EXTRACT_UCHAR(type) == T_OR) { int new_complex; type++; new_complex = low_and_push_complex_pike_type(type); if (new_complex) { if (is_complex) { push_type(T_OR); } else { is_complex = 1; } } type += type_length(type); } switch(EXTRACT_UCHAR(type)) { case T_VOID: case T_ZERO: case T_PROGRAM: case T_STRING: case T_TYPE: case T_FLOAT: case T_INT: /* Simple type. Already handled. */ break; default: push_unfinished_type(type); if (is_complex) { push_type(T_OR); } return 1; } return is_complex; } static void low_and_pike_types(char *t1, char *t2) { if(!t1 || EXTRACT_UCHAR(t1) == T_VOID || !t2 || EXTRACT_UCHAR(t2) == T_VOID) { push_type(T_VOID); } else if(EXTRACT_UCHAR(t1) == T_ZERO || EXTRACT_UCHAR(t2) == T_ZERO) { push_type(T_ZERO); } else if(EXTRACT_UCHAR(t1)==T_MIXED) { push_unfinished_type(t2); } else if(EXTRACT_UCHAR(t2)==T_MIXED) { push_unfinished_type(t1); } else if(EXTRACT_UCHAR(t1)==T_INT && EXTRACT_UCHAR(t2)==T_INT) { INT32 i1,i2; INT32 upper_bound,lower_bound; i1=extract_type_int(t1+1+sizeof(INT32)); i2=extract_type_int(t2+1+sizeof(INT32)); upper_bound = MINIMUM(i1,i2); i1=extract_type_int(t1+1); i2=extract_type_int(t2+1); lower_bound = MAXIMUM(i1,i2); if (upper_bound >= lower_bound) { push_type_int(upper_bound); push_type_int(lower_bound); push_type(T_INT); } else { /* No overlap! */ /* FIXME: Warn? */ push_type(T_VOID); } } else if (EXTRACT_UCHAR(t1) == T_SCOPE) { if (EXTRACT_UCHAR(t2) == T_SCOPE) { low_and_pike_types(t1+2, t2+2); if (EXTRACT_UCHAR(t1+1) > EXTRACT_UCHAR(t2+1)) push_type(EXTRACT_UCHAR(t1+1)); else push_type(EXTRACT_UCHAR(t2+1)); } else { low_and_pike_types(t1+2, t2); push_type(EXTRACT_UCHAR(t1+1)); } push_type(T_SCOPE); } else if (EXTRACT_UCHAR(t2) == T_SCOPE) { low_and_pike_types(t1, t2+2); push_type(EXTRACT_UCHAR(t2+1)); push_type(T_SCOPE); } else if((EXTRACT_UCHAR(t1)==T_STRING && EXTRACT_UCHAR(t2)==T_STRING) || (EXTRACT_UCHAR(t1)==T_TYPE && EXTRACT_UCHAR(t2)==T_TYPE) || (EXTRACT_UCHAR(t1)==T_FLOAT && EXTRACT_UCHAR(t2)==T_FLOAT) || (EXTRACT_UCHAR(t1)==T_PROGRAM && EXTRACT_UCHAR(t2)==T_PROGRAM)) { push_unfinished_type(t1); } else if(low_pike_types_le(t1, t2, 0, 0)) { push_unfinished_type(t1); } else if(low_pike_types_le(t2, t1, 0, 0)) { push_unfinished_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_unfinished_type(t1); */ /* very_low_and_pike_types(t2,t1); */ } } static void medium_and_pike_types(struct pike_string *a, struct pike_string *b) { low_and_pike_types( a ? a->str : 0 , b ? b->str : 0 ); } struct pike_string *and_pike_types(struct pike_string *a, struct pike_string *b) { type_stack_mark(); medium_and_pike_types(a,b); return pop_unfinished_type(); } static struct pike_string *low_object_lfun_type(char *t, short lfun) { struct program *p; int i; p=id_to_program(extract_type_int(t+2)); if(!p) return 0; i=FIND_LFUN(p, lfun); if(i==-1) return 0; return ID_FROM_INT(p, i)->type; } #define A_EXACT 1 #define B_EXACT 2 #define NO_MAX_ARGS 4 #define NO_SHORTCUTS 8 #ifdef PIKE_TYPE_DEBUG static int indent=0; #endif /* * match two type strings, return zero if they don't match, and return * the part of 'a' that _did_ match if it did. */ static char *low_match_types(char *a,char *b, int flags) #ifdef PIKE_TYPE_DEBUG { int e; char *s; static char *low_match_types2(char *a,char *b, int flags); if (l_flag>2) { init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("low_match_types("); low_describe_type(a); if(type_length(a) + type_length(b) > 10) { my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); low_describe_type(b); my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); }else{ my_strcat(", "); low_describe_type(b); 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())); free(s); indent++; } a=low_match_types2(a,b,flags); if (l_flag>2) { indent--; init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("= "); if(a) low_describe_type(a); else my_strcat("NULL"); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf())); free(s); } return a; } static char *low_match_types2(char *a,char *b, int flags) #endif { int correct_args; char *ret; if(a == b) return a; switch(EXTRACT_UCHAR(a)) { case T_AND: a++; ret=low_match_types(a,b,flags); if(!ret) return 0; a+=type_length(a); return low_match_types(a,b,flags); case T_OR: a++; ret=low_match_types(a,b,flags); if(ret && !(flags & NO_SHORTCUTS)) return ret; a+=type_length(a); if(ret) { low_match_types(a,b,flags); return ret; }else{ return low_match_types(a,b,flags); } case T_NOT: if(low_match_types(a+1,b,(flags ^ B_EXACT ) | NO_MAX_ARGS)) return 0; return a; case T_ASSIGN: ret=low_match_types(a+2,b,flags); if(ret && EXTRACT_UCHAR(b)!=T_VOID) { int m=EXTRACT_UCHAR(a+1)-'0'; struct pike_string *tmp; type_stack_mark(); push_unfinished_type_with_markers(b, b_markers); tmp=pop_unfinished_type(); type_stack_mark(); medium_or_pike_types(a_markers[m], tmp, 0); if(a_markers[m]) free_string(a_markers[m]); free_string(tmp); a_markers[m]=pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { char *s; int e; init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("a_markers["); my_putchar((char)(m+'0')); my_strcat("]="); low_describe_type(a_markers[m]->str); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf())); free(s); } #endif #ifdef PIKE_DEBUG if(a_markers[m]->str[0] == m+'0') 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=EXTRACT_UCHAR(a)-'0'; if(a_markers[m]) { #ifdef PIKE_DEBUG if(a_markers[m]->str[0] == EXTRACT_UCHAR(a)) fatal("Cyclic type!\n"); if(EXTRACT_UCHAR(a_markers[m]->str) == T_OR && a_markers[m]->str[1] == EXTRACT_UCHAR(a)) fatal("Cyclic type!\n"); #endif return low_match_types(a_markers[m]->str, b, flags); } else return low_match_types(mixed_type_string->str, b, flags); } } switch(EXTRACT_UCHAR(b)) { case T_AND: b++; ret=low_match_types(a,b,flags); if(!ret) return 0; b+=type_length(b); return low_match_types(a,b,flags); case T_OR: b++; ret=low_match_types(a,b,flags); if(ret && !(flags & NO_SHORTCUTS)) return ret; b+=type_length(b); if(ret) { low_match_types(a,b,flags); return ret; }else{ return low_match_types(a,b,flags); } case T_NOT: if(low_match_types(a,b+1, (flags ^ A_EXACT ) | NO_MAX_ARGS)) return 0; return a; case T_ASSIGN: ret=low_match_types(a,b+2,flags); if(ret && EXTRACT_UCHAR(a)!=T_VOID) { int m=EXTRACT_UCHAR(b+1)-'0'; struct pike_string *tmp; type_stack_mark(); push_unfinished_type_with_markers(a, a_markers); tmp=pop_unfinished_type(); type_stack_mark(); medium_or_pike_types(b_markers[m], tmp, 0); if(b_markers[m]) free_string(b_markers[m]); free_string(tmp); b_markers[m]=pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { char *s; int e; init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("b_markers["); my_putchar((char)(m+'0')); my_strcat("]="); low_describe_type(b_markers[m]->str); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_buf())); free(s); } #endif #ifdef PIKE_DEBUG if(b_markers[m]->str[0] == m+'0') 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=EXTRACT_UCHAR(b)-'0'; if(b_markers[m]) { #ifdef PIKE_DEBUG if(b_markers[m]->str[0] == EXTRACT_UCHAR(b)) fatal("Cyclic type!\n"); #endif return low_match_types(a, b_markers[m]->str, flags); } else return low_match_types(a, mixed_type_string->str, flags); } } /* 'mixed' matches anything */ if(((EXTRACT_UCHAR(a) == T_ZERO || EXTRACT_UCHAR(a) == T_MIXED) && !(flags & (A_EXACT|B_EXACT)) && EXTRACT_UCHAR(b) != T_VOID)) { #if 1 switch(EXTRACT_UCHAR(b)) { /* These types can contain sub-types */ case T_ARRAY: low_match_types(array_type_string->str,b , flags); break; case T_MAPPING: low_match_types(mapping_type_string->str,b, flags); break; case T_FUNCTION: low_match_types(function_type_string->str,b, flags); break; case T_MULTISET: low_match_types(multiset_type_string->str,b, flags); break; } #endif return a; } if((( EXTRACT_UCHAR(b) == T_ZERO || EXTRACT_UCHAR(b) == T_MIXED) && !(flags & (A_EXACT|B_EXACT)) && EXTRACT_UCHAR(a) != T_VOID)) { #if 1 switch(EXTRACT_UCHAR(a)) { /* These types can contain sub-types */ case T_ARRAY: low_match_types(a , array_type_string->str, flags); break; case T_MAPPING: low_match_types(a , mapping_type_string->str, flags); break; case T_FUNCTION: low_match_types(a , function_type_string->str, flags); break; case T_MULTISET: low_match_types(a , multiset_type_string->str, flags); break; } #endif return a; } /* Convert zero to int(0..0). */ if (EXTRACT_UCHAR(a) == T_ZERO) a = tInt0; if (EXTRACT_UCHAR(b) == T_ZERO) b = tInt0; /* Special cases (tm) */ switch(EXTRACT_TWOT(a,b)) { case TWOT(T_PROGRAM, T_FUNCTION): case TWOT(T_FUNCTION, T_PROGRAM): return a; case TWOT(T_OBJECT, T_FUNCTION): { struct pike_string *s; if((s=low_object_lfun_type(a, LFUN_CALL))) return low_match_types(s->str,b,flags); if (flags & B_EXACT) { /* A function isn't an object */ return 0; } return a; } case TWOT(T_FUNCTION, T_OBJECT): { struct pike_string *s; if((s=low_object_lfun_type(b, LFUN_CALL))) return low_match_types(a,s->str,flags); if (flags & A_EXACT) { /* A function isn't an object */ return 0; } return a; } } if(EXTRACT_UCHAR(a) != EXTRACT_UCHAR(b)) return 0; ret=a; switch(EXTRACT_UCHAR(a)) { case T_FUNCTION: correct_args=0; a++; b++; while(EXTRACT_UCHAR(a)!=T_MANY || EXTRACT_UCHAR(b)!=T_MANY) { char *a_tmp,*b_tmp; if(EXTRACT_UCHAR(a)==T_MANY) { a_tmp=a+1; }else{ a_tmp=a; a+=type_length(a); } if(EXTRACT_UCHAR(b)==T_MANY) { b_tmp=b+1; }else{ b_tmp=b; b+=type_length(b); } 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 */ a++; b++; if(EXTRACT_UCHAR(b)==T_VOID || EXTRACT_UCHAR(a)==T_VOID) { a+=type_length(a); b+=type_length(b); }else{ if(!low_match_types(a,b, (flags | NO_MAX_ARGS) & ~(A_EXACT|B_EXACT))) return 0; } if(!(flags & NO_MAX_ARGS)) max_correct_args=0x7fffffff; /* check the returntype */ if ((EXTRACT_UCHAR(b) == T_VOID) && (EXTRACT_UCHAR(a) != T_VOID)) { /* Promote b to a function returning zero. */ if (!low_match_types(a, tZero, flags & ~(A_EXACT|B_EXACT))) return 0; } else if ((EXTRACT_UCHAR(a) == T_VOID) && (EXTRACT_UCHAR(b) != T_VOID)) { /* Promote a to a function returning zero. */ if(!low_match_types(tZero,b,flags & ~(A_EXACT|B_EXACT))) return 0; } else if(!low_match_types(a,b,flags & ~(A_EXACT|B_EXACT))) return 0; break; case T_MAPPING: if(!low_match_types(++a,++b,flags & ~(A_EXACT|B_EXACT))) return 0; if(!low_match_types(a+type_length(a),b+type_length(b), flags & ~(A_EXACT|B_EXACT))) return 0; break; case T_OBJECT: #if 0 if(extract_type_int(a+2) || extract_type_int(b+2)) { 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(!extract_type_int(a+2) || !extract_type_int(b+2)) break; /* object(x *) =? object(x *) */ if(EXTRACT_UCHAR(a+1) == EXTRACT_UCHAR(b+1)) { /* x? */ if(EXTRACT_UCHAR(a+1)) { /* object(1 x) =? object(1 x) */ if(extract_type_int(a+2) != extract_type_int(b+2)) return 0; }else{ /* object(0 *) =? object(0 *) */ /* FIXME: Ought to check the implements relation */ break; } } { struct program *ap,*bp; ap=id_to_program(extract_type_int(a+2)); bp=id_to_program(extract_type_int(b+2)); if(!ap || !bp) break; #if 0 /* FIXME: Temporary kludge. * match_types() currently seems to need to be symetric. */ if (!implements(ap,bp) && !implements(bp,ap)) return 0; #else /* !1 */ if(EXTRACT_UCHAR(a+1)) { if(!implements(implements_a=ap,implements_b=bp)) return 0; }else{ if(!implements(implements_a=bp,implements_b=ap)) return 0; } #endif /* 1 */ } break; case T_INT: { INT32 amin=extract_type_int(a+1); INT32 amax=extract_type_int(a+1+sizeof(INT32)); INT32 bmin=extract_type_int(b+1); INT32 bmax=extract_type_int(b+1+sizeof(INT32)); if(amin > bmax || bmin > amax) return 0; break; } case T_MULTISET: case T_ARRAY: if(!low_match_types(++a,++b,flags & ~(A_EXACT|B_EXACT))) return 0; case T_FLOAT: case T_STRING: case T_TYPE: case T_PROGRAM: case T_ZERO: case T_VOID: case T_MIXED: break; default: fatal("error in type string.\n"); } return ret; } /* * Flags used by pike_types_le() */ #define LE_WEAK_OBJECTS 1 /* Perform weaker checking of objects. */ /* * 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(char *a, char *b, int array_cnt, unsigned int flags) #ifdef PIKE_TYPE_DEBUG { int e; char *s; static int low_pike_types_le2(char *a, char *b, int array_cnt, unsigned int flags); int res; char buf[50]; if (l_flag>2) { init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("low_pike_types_le("); low_describe_type(a); if(type_length(a) + type_length(b) > 10) { my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); low_describe_type(b); }else{ my_strcat(", "); low_describe_type(b); } if(type_length(a) + type_length(b) > 10) { my_strcat(",\n"); for(e=0;e<indent;e++) my_strcat(" "); my_strcat(" "); }else{ 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())); 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(char *a, char *b, int array_cnt, unsigned int flags) #endif /* PIKE_TYPE_DEBUG */ { int ret; if(a == b) return 1; switch(EXTRACT_UCHAR(a)) { case T_AND: /* OK if either of the parts is a subset. */ /* FIXME: What if b also contains an AND? */ a++; ret = low_pike_types_le(a, b, array_cnt, flags); if(ret) return ret; a += type_length(a); return low_pike_types_le(a, b, array_cnt, flags); case T_OR: /* OK, if both of the parts are a subset */ a++; if (EXTRACT_UCHAR(a) == T_VOID) { /* Special case for T_VOID */ /* FIXME: Should probably be handled as T_ZERO. */ a += type_length(a); return low_pike_types_le(a, b, array_cnt, flags); } else { ret=low_pike_types_le(a, b, array_cnt, flags); if (!ret) return 0; a+=type_length(a); if (EXTRACT_UCHAR(a) == T_VOID) { /* Special case for T_VOID */ /* FIXME: Should probably be handled as T_ZERO. */ return 1; } else { return low_pike_types_le(a, b, array_cnt, flags); } } case T_NOT: if (EXTRACT_UCHAR(b) == T_NOT) { return low_pike_types_le(b+1, a+1, -array_cnt, flags); } if (EXTRACT_UCHAR(a+1) == T_NOT) { return low_pike_types_le(a+2, b, array_cnt, flags); } if (low_pike_types_le(a+1, b, array_cnt, flags)) { return 0; } /* FIXME: This is wrong... */ return !low_pike_types_le(b, a+1, -array_cnt, flags); case T_ASSIGN: ret=low_pike_types_le(a+2, b, array_cnt, flags); if(ret && EXTRACT_UCHAR(b)!=T_VOID) { int m=EXTRACT_UCHAR(a+1)-'0'; struct pike_string *tmp; int i; type_stack_mark(); push_unfinished_type_with_markers(b, b_markers); for(i=array_cnt; i > 0; i--) push_type(T_ARRAY); tmp=pop_unfinished_type(); type_stack_mark(); medium_or_pike_types(a_markers[m], tmp, 0); if(a_markers[m]) free_string(a_markers[m]); free_string(tmp); a_markers[m]=pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { char *s; int e; init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("a_markers["); my_putchar((char)(m+'0')); my_strcat("]="); low_describe_type(a_markers[m]->str); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_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=EXTRACT_UCHAR(a)-'0'; if(a_markers[m]) return low_pike_types_le(a_markers[m]->str, b, array_cnt, flags); else return low_pike_types_le(mixed_type_string->str, b, array_cnt, flags); } } switch(EXTRACT_UCHAR(b)) { case T_AND: /* OK, if a is a subset of both parts. */ b++; ret = low_pike_types_le(a, b, array_cnt, flags); if(!ret) return 0; b+=type_length(b); return low_pike_types_le(a, b, array_cnt, flags); case T_OR: /* OK if a is a subset of either of the parts. */ b++; ret=low_pike_types_le(a, b, array_cnt, flags); if (ret) return ret; b+=type_length(b); return low_pike_types_le(a, b, array_cnt, flags); case T_NOT: if (EXTRACT_UCHAR(b+1) == T_NOT) { return low_pike_types_le(a, b+2, array_cnt, flags); } if (low_pike_types_le(a, b+1, array_cnt, flags)) { return 0; } /* FIXME: This is wrong... */ return !low_pike_types_le(b+1, a, -array_cnt, flags); case T_ASSIGN: ret=low_pike_types_le(a, b+2, array_cnt, flags); if(ret && EXTRACT_UCHAR(a)!=T_VOID) { int m=EXTRACT_UCHAR(b+1)-'0'; struct pike_string *tmp; int i; type_stack_mark(); push_unfinished_type_with_markers(a, a_markers); for(i = array_cnt; i < 0; i++) push_type(T_ARRAY); tmp=pop_unfinished_type(); type_stack_mark(); medium_or_pike_types(b_markers[m], tmp, 0); if(b_markers[m]) free_string(b_markers[m]); free_string(tmp); b_markers[m]=pop_unfinished_type(); #ifdef PIKE_TYPE_DEBUG if (l_flag>2) { char *s; int e; init_buf(); for(e=0;e<indent;e++) my_strcat(" "); my_strcat("b_markers["); my_putchar((char)(m+'0')); my_strcat("]="); low_describe_type(b_markers[m]->str); my_strcat("\n"); fprintf(stderr,"%s",(s=simple_free_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=EXTRACT_UCHAR(b)-'0'; if(b_markers[m]) return low_pike_types_le(a, b_markers[m]->str, array_cnt, flags); else return low_pike_types_le(a, mixed_type_string->str, array_cnt, flags); } } if ((array_cnt < 0) && (EXTRACT_UCHAR(b) == T_ARRAY)) { while (EXTRACT_UCHAR(b) == T_ARRAY) { b++; if (!++array_cnt) break; } return low_pike_types_le(a, b, array_cnt, flags); } else if ((array_cnt > 0) && (EXTRACT_UCHAR(a) == T_ARRAY)) { while (EXTRACT_UCHAR(a) == T_ARRAY) { a++; if (!--array_cnt) break; } return low_pike_types_le(a, b, array_cnt, flags); } /* NOTE: void only matches void. */ if (EXTRACT_UCHAR(a) == T_VOID) { /* void <= any_type */ if (array_cnt >= 0) { /* !array(void) */ if (!array_cnt && (EXTRACT_UCHAR(b) == T_VOID)) { return 1; } return 0; } } if (EXTRACT_UCHAR(b) == T_VOID) { if (array_cnt <= 0) { /* !array(void) */ return 0; } } if (EXTRACT_UCHAR(b) == T_MIXED) { /* any_type <= 'mixed' */ if (array_cnt <= 0) { /* !array(mixed) */ return 1; } } if (EXTRACT_UCHAR(a) == T_MIXED) { if (array_cnt >= 0) { /* !array(mixed) */ return 0; } } if (EXTRACT_UCHAR(a) == T_ZERO) { /* void <= zero <= any_type */ if (array_cnt >= 0) { /* !array(zero) */ return 1; } } if (EXTRACT_UCHAR(b) == T_ZERO) { if (array_cnt <= 0) { /* !array(zero) */ return 0; } } /* Special cases (tm) */ switch(EXTRACT_TWOT(a,b)) { case TWOT(T_PROGRAM, T_FUNCTION): case TWOT(T_FUNCTION, T_PROGRAM): /* FIXME: Not really... Should check the return value. */ return 1; case TWOT(T_OBJECT, T_FUNCTION): { struct pike_string *s; if((s=low_object_lfun_type(a, LFUN_CALL))) return low_pike_types_le(s->str, b, array_cnt, flags); return 1; } case TWOT(T_FUNCTION, T_OBJECT): { struct pike_string *s; if((s=low_object_lfun_type(b, LFUN_CALL))) return low_pike_types_le(a, s->str, array_cnt, flags); return 1; } case TWOT(T_FUNCTION, T_ARRAY): { while (EXTRACT_UCHAR(b) == T_ARRAY) { b++; array_cnt++; } return low_pike_types_le(a, b, array_cnt, flags); } case TWOT(T_ARRAY, T_FUNCTION): { while (EXTRACT_UCHAR(a) == T_ARRAY) { a++; array_cnt--; } return low_pike_types_le(a, b, array_cnt, flags); } } if(EXTRACT_UCHAR(a) != EXTRACT_UCHAR(b)) return 0; if (EXTRACT_UCHAR(a) == 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? */ a++; b++; while(EXTRACT_UCHAR(a)!=T_MANY || EXTRACT_UCHAR(b)!=T_MANY) { char *a_tmp,*b_tmp; if(EXTRACT_UCHAR(a)==T_MANY) { a_tmp=a+1; }else{ a_tmp=a; a+=type_length(a); } if(EXTRACT_UCHAR(b)==T_MANY) { b_tmp=b+1; }else{ b_tmp=b; b+=type_length(b); } if (EXTRACT_UCHAR(a_tmp) != T_VOID) { if (!low_pike_types_le(b_tmp, a_tmp, 0, flags)) { return 0; } } } /* check the 'many' type */ a++; b++; if ((EXTRACT_UCHAR(a) != T_VOID) && (EXTRACT_UCHAR(b) != T_VOID)) { if (!low_pike_types_le(b, a, 0, flags)) { return 0; } } a+=type_length(a); b+=type_length(b); /* check the returntype */ /* FIXME: Check array_cnt */ if ((EXTRACT_UCHAR(b) != T_VOID) && (EXTRACT_UCHAR(a) != T_VOID)) { if(!low_pike_types_le(a, b, array_cnt, flags)) return 0; } return 1; } if (array_cnt) return 0; switch(EXTRACT_UCHAR(a)) { case T_MAPPING: /* * mapping(A:B) <= mapping(C:D) iff A <= C && B <= D. */ if(!low_pike_types_le(++a, ++b, 0, flags)) return 0; return low_pike_types_le(a+type_length(a), b+type_length(b), 0, flags); case T_OBJECT: #if 0 if(extract_type_int(a+2) || extract_type_int(b+2)) { 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(!extract_type_int(b+2)) return 1; if(!extract_type_int(a+2)) return 0; if ((EXTRACT_UCHAR(a+1) || !EXTRACT_UCHAR(b+1)) && (extract_type_int(a+2) == extract_type_int(b+2))) return 1; if (EXTRACT_UCHAR(b+1)) { return 0; } { struct program *ap = id_to_program(extract_type_int(a+2)); struct program *bp = id_to_program(extract_type_int(b+2)); if (!ap || !bp) { /* Shouldn't happen... */ return 0; } if ((flags & LE_WEAK_OBJECTS) && (!EXTRACT_UCHAR(a+1))) { return is_compatible(implements_a=ap, implements_b=bp); } return implements(implements_a=ap, implements_b=bp); } break; case T_INT: { INT32 amin=extract_type_int(a+1); INT32 amax=extract_type_int(a+1+sizeof(INT32)); INT32 bmin=extract_type_int(b+1); INT32 bmax=extract_type_int(b+1+sizeof(INT32)); if(amin < bmin || amax > bmax) return 0; break; } case T_MULTISET: case T_ARRAY: if(!low_pike_types_le(++a, ++b, 0, flags)) return 0; case T_FLOAT: case T_STRING: case T_TYPE: case T_PROGRAM: case T_ZERO: case T_VOID: case T_MIXED: break; default: 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(char *fun_type, char *arg_type) { while ((EXTRACT_UCHAR(fun_type) == T_OR) || (EXTRACT_UCHAR(fun_type) == T_ARRAY)) { if (EXTRACT_UCHAR(fun_type++) == T_OR) { int res = strict_check_call(fun_type, arg_type); if (res) return res; fun_type += type_length(fun_type); } } 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_string *to, struct pike_string *from) { return low_pike_types_le(to->str, from->str, 0, LE_WEAK_OBJECTS); } /* * Return the return type from a function call. */ static int low_get_return_type(char *a,char *b) { int tmp; switch(EXTRACT_UCHAR(a)) { case T_OR: { struct pike_string *o1,*o2; a++; o1=o2=0; type_stack_mark(); if(low_get_return_type(a,b)) { o1=pop_unfinished_type(); type_stack_mark(); } if(low_get_return_type(a+type_length(a),b)) o2=pop_unfinished_type(); else pop_stack_mark(); if(!o1 && !o2) return 0; medium_or_pike_types(o1,o2, 0); if(o1) free_string(o1); if(o2) free_string(o2); return 1; } case T_AND: a++; type_stack_mark(); tmp=low_get_return_type(a,b); type_stack_pop_to_mark(); if(!tmp) return 0; return low_get_return_type(a+type_length(a),b); case T_ARRAY: a++; tmp=low_get_return_type(a,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(EXTRACT_UCHAR(a)) { case T_FUNCTION: a++; while(EXTRACT_UCHAR(a)!=T_MANY) a+=type_length(a); a++; a+=type_length(a); push_unfinished_type_with_markers(a, a_markers ); return 1; case T_PROGRAM: push_type_int(0); push_type(0); push_type(T_OBJECT); return 1; default: push_type(T_MIXED); return 1; } } return 0; } int match_types(struct pike_string *a,struct pike_string *b) { check_type_string(a); check_type_string(b); clear_markers(); return 0!=low_match_types(a->str, b->str,0); } int pike_types_le(struct pike_string *a,struct pike_string *b) { check_type_string(a); check_type_string(b); clear_markers(); return low_pike_types_le(a->str, b->str, 0, 0); } #ifdef DEBUG_MALLOC #define low_index_type(X,Y,Z) ((struct pike_string *)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_string *debug_low_index_type(char *t, char *index_type, node *n) { struct pike_string *tmp; struct program *p; switch(low_check_indexing(t, index_type, n)) { case 0: return 0; case -1: reference_shared_string(zero_type_string); return zero_type_string; } switch(EXTRACT_UCHAR(t++)) { case T_OBJECT: { p=id_to_program(extract_type_int(t+1)); 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; reference_shared_string(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; reference_shared_string(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) { reference_shared_string(mixed_type_string); return mixed_type_string; }else{ #if 0 if(EXTRACT_UCHAR(t) || (p->identifier_references[i].id_flags & ID_NOMASK) || (ID_FROM_INT(p, i)->identifier_flags & IDENTIFIER_PROTOTYPED)) { #endif reference_shared_string(ID_FROM_INT(p, i)->type); return ID_FROM_INT(p, i)->type; #if 0 }else{ reference_shared_string(mixed_type_string); return mixed_type_string; } #endif } } } } default: reference_shared_string(mixed_type_string); return mixed_type_string; case T_MIXED: if (lex.pragmas & ID_STRICT_TYPES) { yywarning("Indexing mixed."); } reference_shared_string(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 T_VOID: case T_FLOAT: return 0; case T_OR: { struct pike_string *a,*b; a=low_index_type(t,index_type,n); t+=type_length(t); b=low_index_type(t,index_type,n); if(!b) return a; if(!a) return b; type_stack_mark(); medium_or_pike_types(a,b,1); free_string(a); free_string(b); return pop_unfinished_type(); } case T_AND: return low_index_type(t+type_length(t),index_type,n); case T_STRING: /* always int */ case T_MULTISET: /* always int */ reference_shared_string(int_type_string); return int_type_string; case T_MAPPING: t+=type_length(t); return make_shared_binary_string(t, type_length(t)); case T_ARRAY: { struct pike_string *a; if(low_pike_types_le(tString, index_type, 0, 0) && (a = low_index_type(t, tString, n))) { /* Possible to index the array with a string. */ type_stack_mark(); push_finished_type(a); free_string(a); push_type(T_ARRAY); if (low_match_types(tInt, index_type, 0)) { /* Also possible to index the array with an int. */ push_unfinished_type(t); push_type(T_OR); } return pop_unfinished_type(); } if (low_match_types(tInt, index_type, 0)) { /* Possible to index the array with an int. */ return make_shared_binary_string(t, type_length(t)); } /* Bad index type. */ return 0; } } } struct pike_string *index_type(struct pike_string *type, struct pike_string *index_type, node *n) { struct pike_string *t; clear_markers(); t=low_index_type(type->str,index_type->str,n); if(!t) copy_shared_string(t,mixed_type_string); return t; } static struct pike_string *low_array_value_type(char *arr_t) { struct pike_string *res = NULL; struct pike_string *sub_t; while (EXTRACT_UCHAR(arr_t) == T_OR) { arr_t++; sub_t = low_array_value_type(arr_t); arr_t += type_length(arr_t); if (sub_t) { if (res) { struct pike_string *new = or_pike_types(res, sub_t, 1); free_string(res); free_string(sub_t); res = new; } else { res = sub_t; } } } if (EXTRACT_UCHAR(arr_t) != T_ARRAY) return res; arr_t++; sub_t = make_shared_binary_string(arr_t, type_length(arr_t)); if (res) { struct pike_string *new = or_pike_types(res, sub_t, 1); free_string(res); free_string(sub_t); return new; } return sub_t; } struct pike_string *array_value_type(struct pike_string *array_type) { struct pike_string *t = low_array_value_type(array_type->str); if (!t) copy_shared_string(t, mixed_type_string); return t; } #ifdef DEBUG_MALLOC #define low_key_type(X,Y) ((struct pike_string *)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_string *debug_low_key_type(char *t, node *n) { switch(EXTRACT_UCHAR(t++)) { case T_OBJECT: { struct program *p=id_to_program(extract_type_int(t+1)); if(p && n) { if(n->token == F_ARROW) { if(FIND_LFUN(p,LFUN_ARROW)!=-1 || FIND_LFUN(p,LFUN_ASSIGN_ARROW)!=-1) { reference_shared_string(mixed_type_string); return mixed_type_string; } }else{ if(FIND_LFUN(p,LFUN_INDEX) != -1 || FIND_LFUN(p,LFUN_ASSIGN_INDEX) != -1) { reference_shared_string(mixed_type_string); return mixed_type_string; } } } reference_shared_string(string_type_string); return string_type_string; } default: reference_shared_string(mixed_type_string); return mixed_type_string; case T_VOID: case T_ZERO: case T_TYPE: case T_FLOAT: case T_INT: return 0; case T_OR: { struct pike_string *a,*b; a=low_key_type(t,n); t+=type_length(t); b=low_key_type(t,n); if(!b) return a; if(!a) return b; type_stack_mark(); medium_or_pike_types(a,b,1); free_string(a); free_string(b); return pop_unfinished_type(); } case T_AND: return low_key_type(t+type_length(t),n); case T_ARRAY: case T_STRING: /* always int */ reference_shared_string(int_type_string); return int_type_string; case T_MAPPING: case T_MULTISET: return make_shared_binary_string(t, type_length(t)); } } struct pike_string *key_type(struct pike_string *type, node *n) { struct pike_string *t; clear_markers(); t=low_key_type(type->str,n); if(!t) copy_shared_string(t,mixed_type_string); return t; } static int low_check_indexing(char *type, char *index_type, node *n) { switch(EXTRACT_UCHAR(type++)) { case T_OR: return low_check_indexing(type,index_type,n) || low_check_indexing(type+type_length(type),index_type,n); case T_AND: return low_check_indexing(type,index_type,n) && low_check_indexing(type+type_length(type),index_type,n); case T_NOT: return low_check_indexing(type,index_type,n)!=1; case T_ARRAY: if(low_match_types(string_type_string->str, index_type,0) && low_check_indexing(type, index_type,n)) return 1; case T_STRING: return !!low_match_types(int_type_string->str, index_type,0); case T_OBJECT: { struct program *p=id_to_program(extract_type_int(type+1)); 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->str, index_type,0); }else{ return 1; } } case T_MULTISET: case T_MAPPING: return low_match_types(type,index_type,0) ? 1 : -1; #ifdef AUTO_BIGNUM case T_INT: #endif case T_PROGRAM: return !!low_match_types(string_type_string->str, index_type,0); case T_MIXED: return 1; default: return 0; } } int check_indexing(struct pike_string *type, struct pike_string *index_type, node *n) { check_type_string(type); check_type_string(index_type); return low_check_indexing(type->str, index_type->str, n); } static int low_count_arguments(char *q) { int num,num2; switch(EXTRACT_UCHAR(q++)) { case T_OR: num=low_count_arguments(q); num2=low_count_arguments(q+type_length(q)); 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); num2=low_count_arguments(q+type_length(q)); 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; default: return 0x7fffffff; case T_FUNCTION: num=0; while(EXTRACT_UCHAR(q)!=T_MANY) { num++; q+=type_length(q); } q++; if(EXTRACT_UCHAR(q)!=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_string *s) { check_type_string(s); return low_count_arguments(s->str); } static int low_minimum_arguments(char *q) { int num; switch(EXTRACT_UCHAR(q++)) { case T_OR: case T_AND: return MAXIMUM(low_count_arguments(q), low_count_arguments(q+type_length(q))); default: return 0; case T_FUNCTION: num=0; while(EXTRACT_UCHAR(q)!=T_MANY) { if(low_match_types(void_type_string->str, q, B_EXACT)) return num; num++; q+=type_length(q); } return num; } } /* Count the minimum number of arguments for a funciton type. */ int minimum_arguments(struct pike_string *s) { int ret; check_type_string(s); ret=low_minimum_arguments(s->str); #if 0 fprintf(stderr,"minimum_arguments("); simple_describe_type(s); fprintf(stderr," ) -> %d\n",ret); #endif return ret; } struct pike_string *check_call(struct pike_string *args, struct pike_string *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->str,args->str)) { if (strict) { if (!strict_check_call(type->str, args->str)) { struct pike_string *type_t = describe_type(type); if (!low_pike_types_le(type->str, tFuncV(tNone,tZero,tMix), 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_string(type_t); } } return pop_unfinished_type(); }else{ pop_stack_mark(); return 0; } } INT32 get_max_args(struct pike_string *type) { INT32 ret,tmp=max_correct_args; check_type_string(type); clear_markers(); type = check_call(function_type_string, type, 0); if(type) free_string(type); ret=max_correct_args; max_correct_args=tmp; return tmp; } struct pike_string *zzap_function_return(char *a, INT32 id) { switch(EXTRACT_UCHAR(a)) { case T_OR: { struct pike_string *ar, *br, *ret=0; a++; ar=zzap_function_return(a,id); br=zzap_function_return(a+type_length(a),id); if(ar && br) ret=or_pike_types(ar,br,0); if(ar) free_string(ar); if(br) free_string(br); return ret; } case T_FUNCTION: type_stack_mark(); push_type_int(id); push_type(1); push_type(T_OBJECT); type_stack_mark(); a++; while(EXTRACT_UCHAR(a)!=T_MANY) { type_stack_mark(); push_unfinished_type(a); type_stack_reverse(); a+=type_length(a); } a++; push_type(T_MANY); type_stack_mark(); push_unfinished_type(a); type_stack_reverse(); type_stack_reverse(); push_type(T_FUNCTION); return pop_unfinished_type(); case T_ARRAY: return zzap_function_return(a+1,id); case T_MIXED: /* I wonder when this occurrs, but apparently it does... */ return zzap_function_return(tFuncV(tVoid,tOr(tMix,tVoid),tObj), id); } /* This error is bogus /Hubbe fatal("zzap_function_return() called with unexpected value: %d\n", EXTRACT_UCHAR(a)); */ return NULL; } struct pike_string *get_type_of_svalue(struct svalue *s) { struct pike_string *ret; switch(s->type) { case T_FUNCTION: if(s->subtype == FUNCTION_BUILTIN) { ret=s->u.efun->type; }else{ struct program *p; p=s->u.object->prog; if(!p) { ret=zero_type_string; }else{ ret=ID_FROM_INT(p,s->subtype)->type; } } reference_shared_string(ret); return ret; case T_MULTISET: case T_ARRAY: { struct pike_string *arg_type; struct array *a; if (s->type == T_MULTISET) { a = s->u.multiset->ind; } else { a = s->u.array; } #if 0 int i; /* FIXME: Circular structures? */ copy_shared_string(arg_type, zero_type_string); for (i = 0; i < a->size; i++) { struct pike_string *tmp1 = get_type_of_svalue(a->item+i); struct pike_string *tmp2 = or_pike_types(arg_type, tmp1, 1); free_string(arg_type); free_string(tmp1); arg_type = tmp2; } #else /* !0 */ if (a->size) copy_shared_string(arg_type, mixed_type_string); else copy_shared_string(arg_type, zero_type_string); #endif /* 0 */ type_stack_mark(); push_unfinished_type(arg_type->str); free_string(arg_type); push_type(s->type); return pop_unfinished_type(); } case T_MAPPING: type_stack_mark(); if (m_sizeof(s->u.mapping)) { push_type(T_MIXED); push_type(T_MIXED); } 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_type_int(MAX_INT32); push_type_int(MIN_INT32); push_type(T_INT); } else #endif { push_type_int(s->u.object->prog->id); push_type(1); push_type(T_OBJECT); } }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_type_int(s->u.integer); push_type_int(s->u.integer); push_type(T_INT); return pop_unfinished_type(); }else{ ret=zero_type_string; } reference_shared_string(ret); return ret; case T_PROGRAM: { char *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->str; if((tmp=zzap_function_return(a, s->u.program->id))) return tmp; 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); } } a=tFunc( tNone ,tObj); if((tmp=zzap_function_return(a, s->u.program->id))) return tmp; fatal("Completely failed to zzap function return!\n"); } default: type_stack_mark(); push_type(s->type); return pop_unfinished_type(); } } static struct pike_string *low_object_type_to_program_type(char *obj_t) { struct pike_string *res = NULL; struct pike_string *sub; struct svalue sval; int id; while(EXTRACT_UCHAR(obj_t) == T_OR) { obj_t++; sub = low_object_type_to_program_type(obj_t); if (!sub) { if (res) { free_string(res); } return NULL; } if (res) { struct pike_string *tmp = or_pike_types(res, sub, 1); free_string(res); free_string(sub); res = tmp; } else { res = sub; } obj_t += type_length(obj_t); } sval.type = T_PROGRAM; if ((EXTRACT_UCHAR(obj_t) != T_OBJECT) || (!(id = extract_type_int(obj_t + 2))) || (!(sval.u.program = id_to_program(id))) || (!(sub = get_type_of_svalue(&sval)))) { if (res) { free_string(res); } return NULL; } /* FIXME: obj_t + 1 should propagate to the return-type in sub. */ if (res) { struct pike_string *tmp = or_pike_types(res, sub, 1); free_string(res); free_string(sub); return tmp; } return sub; } /* Used by fix_object_program_type() */ struct pike_string *object_type_to_program_type(struct pike_string *obj_t) { return low_object_type_to_program_type(obj_t->str); } char *get_name_of_type(int 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_LVALUE: return "lvalue"; 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_MAPPING_DATA: return "mapping_data"; default: return "unknown"; } } void cleanup_pike_types(void) { free_string(string_type_string); free_string(int_type_string); free_string(float_type_string); free_string(function_type_string); free_string(object_type_string); free_string(program_type_string); free_string(array_type_string); free_string(multiset_type_string); free_string(mapping_type_string); free_string(type_type_string); free_string(mixed_type_string); free_string(void_type_string); free_string(zero_type_string); free_string(any_type_string); free_string(weak_type_string); } int type_may_overload(char *type, int lfun) { switch(EXTRACT_UCHAR(type++)) { case T_ASSIGN: return type_may_overload(type+1,lfun); case T_FUNCTION: case T_ARRAY: /* might want to check for `() */ default: return 0; case T_OR: return type_may_overload(type,lfun) || type_may_overload(type+type_length(type),lfun); case T_AND: return type_may_overload(type,lfun) && type_may_overload(type+type_length(type),lfun); case T_NOT: return !type_may_overload(type,lfun); case T_MIXED: return 1; case T_OBJECT: { struct program *p=id_to_program(extract_type_int(type+1)); if(!p) return 1; return FIND_LFUN(p, lfun)!=-1; } } } void yyexplain_nonmatching_types(struct pike_string *type_a, struct pike_string *type_b, int flags) { implements_a=0; implements_b=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->str); my_yyerror("Got : %s",s2->str); } free_string(s1); free_string(s2); } if(implements_a && implements_b) yyexplain_not_implements(implements_a,implements_b,flags); } struct pike_string *make_pike_type(char *t) { return make_shared_binary_string(t, type_length(t)); }

pike.git/ src/ pike_types.c > da77e22a687e4b299c33a12d54a8afeb4b8d5a0c [Annotate]