pike.git/src/sscanf.c:a78f710ccf4cf5d5ea7b2cbf507ab4310dade945

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2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.h" #include "interpret.h" #include "array.h" #include "mapping.h" #include "multiset.h" #include "stralloc.h" #include "pike_error.h" #include "fd_control.h" #include "builtin_functions.h" #include "module_support.h" #include "operators.h" #include "bignum.h" #include "pike_compiler.h" #include "pike_float.h" #include "pike_types.h" #include "sscanf.h" #include "bitvector.h" #include "pike_search.h" /* * helper functions for sscanf %O */ /* Calling convention: * res: svalue to fill in. * str: string to parse. * len: length of the string. * * Returns: * NULL on failure. * continuation point in str on success. */ #define CONSUME(X) do{if(*len>=X){INC_PCHARP(*str,X);*len-=X;}}while(0) static p_wchar2 next_char( PCHARP *str, ptrdiff_t *len ) { p_wchar2 res = *len ? EXTRACT_PCHARP(*str) : 0; CONSUME(1); return res; } #define READ() next_char(str,len) #ifdef HANDLES_UNALIGNED_MEMORY_ACCESS #define NOINLINE_UNALIGNED #else /* Workaround for gcc 4.7.4 and others "optimizing" away calls to memcpy(), * and replacing them with direct (unaligned) memory accesses. * This generates broken code for eg %F on sparc. * cf https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50569 * Note that the patch for the above bug is in gcc 4.7.4, but isn't sufficient. */ #define NOINLINE_UNALIGNED ATTRIBUTE((noinline)) DECLSPEC((noinline)) #endif #if SIZEOF_FLOAT_TYPE > SIZEOF_DOUBLE #define STRTOFLOAT_PCHARP STRTOLD_PCHARP #else #define STRTOFLOAT_PCHARP STRTOD_PCHARP #endif static void skip_comment( PCHARP *str, ptrdiff_t *len ) { CONSUME(1); // Start '/' switch(READ()) { case '*': while(*len) { while( READ() != '*' ) ; if( READ() == '/' ) return; } break; case '/': while( *len && READ()!= '\n' ) ; } } static void skip_to_token( PCHARP *str, ptrdiff_t *len ) { int worked; do { worked=0; while(*len && wide_isspace(EXTRACT_PCHARP(*str))) { worked = 1; CONSUME(1); } if( EXTRACT_PCHARP(*str) == '/' ) { skip_comment(str,len); worked=1; } }while(worked); } /* Note: Serious code-duplication from the lexer. */ static int pcharp_to_svalue_rec(PCHARP *str, ptrdiff_t *len) { extern int parse_esc_seq_pcharp (PCHARP buf, p_wchar2 *chr, ptrdiff_t *len); struct svalue *begin = Pike_sp; PCHARP start = *str; check_stack(100); check_c_stack(1000); while(1) { skip_to_token(str,len); switch( READ() ) { default: goto fail; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int base = 10; CONSUME(-1); goto read_number; case '0': switch( EXTRACT_PCHARP(*str) ) { case 'x':case 'X': base = 16; CONSUME(1); break; case 'b':case 'B': base = 2; CONSUME(1); break; case '.': CONSUME(-1); goto read_float; case 'e':case 'E': CONSUME(-1); push_float(0.0); return 1; default: base = 8; CONSUME(-1); break; } read_number: /* Integer or float. */ push_int(0); if( pcharp_to_svalue_inumber(Pike_sp-1,*str,str,base,*len) ) { if( (EXTRACT_PCHARP(*str) == '.' || EXTRACT_PCHARP(*str)=='e'|| EXTRACT_PCHARP(*str)=='E') ) { read_float: { void *integer_parse = str->ptr; FLOAT_TYPE res; res = STRTOFLOAT_PCHARP(start,str); if( integer_parse < str->ptr ) { pop_stack(); push_float(res); } } *len -= SUBTRACT_PCHARP(*str,start); if( *len < 0 ) /* this is possible for floats combined with %<len>O format. */ goto fail; } return 1; } } goto fail; case '\'': // single character. { unsigned int l = 0; struct svalue res = svalue_int_zero; ptrdiff_t used; MP_INT bigint; while(1) { p_wchar2 tmp; switch( (tmp=READ()) ) { case 0: goto fail; case '\\': if( parse_esc_seq_pcharp(*str,&tmp,&used) ) return 0; CONSUME(used); /* fallthrough. */ default: l++; if( l == sizeof(INT_TYPE)-1 ) { /* overflow possible. Switch to bignums. */ mpz_init(&bigint); mpz_set_ui(&bigint,res.u.integer); TYPEOF(res) = PIKE_T_OBJECT; } if( l >= sizeof(INT_TYPE)-1 ) { mpz_mul_2exp(&bigint,&bigint,8); mpz_add_ui(&bigint,&bigint,tmp); } else { res.u.integer <<= 8; res.u.integer |= tmp; } break; case '\'': if( TYPEOF(res) == PIKE_T_OBJECT ) { push_bignum( &bigint ); mpz_clear(&bigint); reduce_stack_top_bignum(); return 1; } *Pike_sp++ = res; return 1; } } } case '"': { struct string_builder tmp; PCHARP start; int cnt; init_string_builder(&tmp,0); start = *str; cnt = 0; for (;*len;) { switch(READ()) { case '\"': /* End of string -- done. */ if (cnt) string_builder_append(&tmp, start, cnt); push_string(finish_string_builder(&tmp)); return 1; case '\\': { /* Escaped character */ p_wchar2 val=0; ptrdiff_t consumed; if( !parse_esc_seq_pcharp(*str,&val,&consumed) ) CONSUME(consumed); if (cnt) string_builder_append(&tmp, start, cnt); string_builder_putchar(&tmp, val); *str=start; } continue; case '\n': free_string_builder(&tmp); goto fail; default: cnt++; continue; } } /* Unterminated string -- fail. */ free_string_builder(&tmp); goto fail; } case '(': // container. { int num=0; p_wchar2 tmp; #define CHECK_STACK_ADD(ADD) do{ \ if(Pike_sp-begin > 100 ) { \ ADD(Pike_sp-begin); \ begin= Pike_sp; \ num++; \ } \ }while(0) #define FINISH(ADD) do { \ num++; \ ADD(Pike_sp-begin); \ goto container_finished; \ } while(0) switch( READ() ) { case '[': while(1) { skip_to_token(str,len); if(EXTRACT_PCHARP(*str) == ']' ) { CONSUME(1); FINISH(f_aggregate_mapping); } if( !pcharp_to_svalue_rec(str,len) ) goto fail; skip_to_token(str,len); if( READ() != ':' ) goto fail; if(!pcharp_to_svalue_rec(str,len)) goto fail; skip_to_token(str,len); tmp = READ(); if( tmp == ']' ) FINISH(f_aggregate_mapping); if( tmp != ',' ) goto fail; CHECK_STACK_ADD(f_aggregate_mapping); } break; case '{': while(1) { skip_to_token(str,len); if(EXTRACT_PCHARP(*str)=='}' ) { CONSUME(1); FINISH(f_aggregate); } if( !pcharp_to_svalue_rec(str,len) ) goto fail; skip_to_token(str,len); tmp=READ(); if(tmp == '}' ) FINISH(f_aggregate); if( tmp != ',' ) goto fail; CHECK_STACK_ADD(f_aggregate); } break; case '<': while(1) { skip_to_token(str,len); if(EXTRACT_PCHARP(*str)=='>' ) { CONSUME(1); FINISH(f_aggregate_multiset); } if( !pcharp_to_svalue_rec(str,len) ) goto fail; skip_to_token(str,len); tmp=READ(); if(tmp == '>' ) FINISH(f_aggregate_multiset); if( tmp != ',' ) goto fail; CHECK_STACK_ADD(f_aggregate_multiset); } break; default: /* Not a valid container. */ goto fail; } #undef FINISH #undef CHECK_STACK_ADD /* end of container. */ container_finished: if( READ() != ')' ) goto fail; if(num > 1 ) f_add(num); return 1; } } } fail: pop_n_elems(Pike_sp-begin); return 0; } static void *pcharp_to_svalue_percent_o(struct svalue *res, PCHARP str, ptrdiff_t len) { SET_SVAL(*res, T_INT, NUMBER_UNDEFINED, integer, 0); if( pcharp_to_svalue_rec( &str, &len ) ) { *res = *--Pike_sp; return str.ptr; } return NULL; } /* flags: * operators: %d %H %s %f %c %n %[ %% %O */ struct sscanf_set { int neg; char c[256]; struct array *a; }; /* FIXME: * This implementation will break in certain cases, especially cases * like this [\1000-\1002\1001] (ie, there is a single character which * is also a part of a range * /Hubbe */ #define MKREADSET(SIZE) \ static ptrdiff_t PIKE_CONCAT(read_set,SIZE) ( \ PIKE_CONCAT(p_wchar,SIZE) *match, \ ptrdiff_t cnt, \ struct sscanf_set *set, \ ptrdiff_t match_len) \ { \ p_wchar2 e, last = 0; \ MATCH_IS_WIDE( int set_size=0; ) \ \ if(cnt>=match_len) \ Pike_error("Unterminated sscanf set.\n"); \ \ memset(set->c, 0, sizeof(set->c)); \ set->a=0; \ \ if(match[cnt]=='^' && \ (cnt+2>=match_len || match[cnt+1]!='-' || \ match[cnt+2]==']')) \ { \ set->neg=1; \ cnt++; \ if(cnt>=match_len) \ Pike_error("Unterminated negated sscanf set.\n"); \ }else{ \ set->neg=0; \ } \ \ if(match[cnt]==']' || match[cnt]=='-') \ { \ set->c[last=match[cnt]]=1; \ cnt++; \ if(cnt>=match_len) \ Pike_error("Empty sscanf range.\n"); \ } \ \ for(;match[cnt]!=']';) \ { \ if(match[cnt]=='-') \ { \ cnt++; \ if(cnt>=match_len) \ Pike_error("Unterminated sscanf range.\n"); \ \ if(match[cnt]==']') \ { \ set->c['-']=1; \ break; \ } \ \ if(last > match[cnt]) \ Pike_error("Inverted sscanf range [%c-%c].\n", \ last, match[cnt]); \ \ MATCH_IS_WIDE( \ if(last < (p_wchar2)sizeof(set->c) && last >= 0) \ { \ if(match[cnt] < (p_wchar2)sizeof(set->c)) \ { \ ) \ for(e=last;e<=match[cnt];e++) set->c[e]=1; \ MATCH_IS_WIDE( \ }else{ \ for(e=last;e<(p_wchar2)sizeof(set->c);e++) \ set->c[e]=1; \ \ check_stack(2); \ push_int(256); \ push_int(match[cnt]); \ set_size++; \ } \ } \ else \ { \ Pike_sp[-1].u.integer=match[cnt]; \ } \ ) \ } else { \ last=match[cnt]; \ MATCH_IS_WIDE( \ if(last < (p_wchar2)sizeof(set->c) && last >= 0) \ ) \ set->c[last]=1; \ MATCH_IS_WIDE( \ else{ \ if(set_size && \ ((p_wchar2)Pike_sp[-1].u.integer) == last-1) \ { \ Pike_sp[-1].u.integer++; \ }else{ \ check_stack(2); \ push_int(last); \ push_int(last); \ set_size++; \ } \ } \ ) \ } \ cnt++; \ if(cnt>=match_len) \ Pike_error("Unterminated sscanf set.\n"); \ } \ \ MATCH_IS_WIDE( \ if(set_size) \ { \ INT32 *order; \ set->a=aggregate_array(set_size*2); \ order=get_switch_order(set->a); \ for(e=0;e<(p_wchar2)set->a->size;e+=2) \ { \ if(order[e]+1 != order[e+1] && \ order[e+1]+1 != order[e]) { \ free_array(set->a); \ set->a=0; \ free(order); \ Pike_error("Overlapping ranges in sscanf not supported.\n"); \ } \ } \ \ order_array(set->a,order); \ free(order); \ } \ ) \ return cnt; \ } /* Parse binary IEEE strings on a machine which uses a different kind of floating point internally */ #ifdef NEED_CUSTOM_IEEE static inline FLOAT_TYPE low_parse_IEEE_float(const char *b, int sz) { unsigned INT32 f, extra_f; int s, e; unsigned char x[4]; double r; if (sz < 0) { x[0] = EXTRACT_UCHAR(b-sz-1); x[1] = EXTRACT_UCHAR(b-sz-2); x[2] = EXTRACT_UCHAR(b-sz-3); x[3] = EXTRACT_UCHAR(b-sz-4); } else { x[0] = EXTRACT_UCHAR(b); x[1] = EXTRACT_UCHAR(b+1); x[2] = EXTRACT_UCHAR(b+2); x[3] = EXTRACT_UCHAR(b+3); } s = ((x[0]&0x80)? 1 : 0); if(sz==4 || sz==-4) { e = (((int)(x[0]&0x7f))<<1)|((x[1]&0x80)>>7); f = (((unsigned INT32)(x[1]&0x7f))<<16)|(((unsigned INT32)x[2])<<8)|x[3]; extra_f = 0; if(e==255) e = 9999; else if(e>0) { f |= 0x00800000; e -= 127+23; } else e -= 126+23; } else { e = (((int)(x[0]&0x7f))<<4)|((x[1]&0xf0)>>4); f = (((unsigned INT32)(x[1]&0x0f))<<16)|(((unsigned INT32)x[2])<<8)|x[3]; if (sz < 0) extra_f = (((unsigned INT32)EXTRACT_UCHAR(b+3))<<24)| (((unsigned INT32)EXTRACT_UCHAR(b+2))<<16)| (((unsigned INT32)EXTRACT_UCHAR(b+1))<<8)| ((unsigned INT32)EXTRACT_UCHAR(b)); else extra_f = (((unsigned INT32)EXTRACT_UCHAR(b+4))<<24)| (((unsigned INT32)EXTRACT_UCHAR(b+5))<<16)| (((unsigned INT32)EXTRACT_UCHAR(b+6))<<8)| ((unsigned INT32)EXTRACT_UCHAR(b+7)); if(e==2047) e = 9999; else if(e>0) { f |= 0x00100000; e -= 1023+20; } else e -= 1022+20; } if(e>=9999) { if(f||extra_f) { /* NAN */ return (FLOAT_TYPE)MAKE_NAN(); } else { /* +/- Infinity */ return (FLOAT_TYPE)MAKE_INF() * (s? -1:1); } } r = (double)f; if(extra_f) r += ((double)extra_f)/4294967296.0; return (FLOAT_TYPE)(s? -ldexp(r, e):ldexp(r, e)); } #endif static FLOAT_TYPE NOINLINE_UNALIGNED extract_float_be(const char * x) { #ifdef FLOAT_IS_IEEE_BIG float f; memcpy(&f, x, sizeof(f)); return f; #elif FLOAT_IS_IEEE_LITTLE float f; unsigned INT32 tmp = get_unaligned32(x); tmp = bswap32(tmp); memcpy(&f, &tmp, sizeof(f)); return f; #else return low_parse_IEEE_float(x, 4); #endif } static FLOAT_TYPE NOINLINE_UNALIGNED extract_double_be(const char * x) { #ifdef DOUBLE_IS_IEEE_BIG double f; memcpy(&f, x, sizeof(f)); return f; #elif DOUBLE_IS_IEEE_LITTLE double f; #ifdef UINT64 UINT64 tmp = get_unaligned64(x); tmp = bswap64(tmp); #else char tmp[8]; tmp[7] = x[0]; tmp[6] = x[1]; tmp[5] = x[2]; tmp[4] = x[3]; tmp[3] = x[4]; tmp[2] = x[5]; tmp[1] = x[6]; tmp[0] = x[7]; #endif memcpy(&f, &tmp, sizeof(f)); return f; #else return low_parse_IEEE_float(x, 8); #endif } static FLOAT_TYPE NOINLINE_UNALIGNED extract_float_le(const char * x) { #ifdef FLOAT_IS_IEEE_LITTLE float f; memcpy(&f, x, sizeof(f)); return f; #elif FLOAT_IS_IEEE_BIG float f; unsigned INT32 tmp = get_unaligned32(x); tmp = bswap32(tmp); memcpy(&f, &tmp, sizeof(f)); return f; #else return low_parse_IEEE_float(x, -4); #endif } static FLOAT_TYPE NOINLINE_UNALIGNED extract_double_le(const char * x) { #ifdef DOUBLE_IS_IEEE_LITTLE double f; memcpy(&f, x, sizeof(f)); return f; #elif DOUBLE_IS_IEEE_BIG double f; #ifdef UINT64 UINT64 tmp = get_unaligned64(x); tmp = bswap64(tmp); #else char tmp[8]; tmp[7] = x[0]; tmp[6] = x[1]; tmp[5] = x[2]; tmp[4] = x[3]; tmp[3] = x[4]; tmp[2] = x[5]; tmp[1] = x[6]; tmp[0] = x[7]; #endif memcpy(&f, &tmp, sizeof(f)); return f; #else return low_parse_IEEE_float(x, -8); #endif } #define EXTRACT_FLOAT(SVAL, input, shift, fun) do { \ char x[4]; \ if (shift == 0) { \ memcpy(x, input, sizeof(x)); \ } else { \ PCHARP tmp = MKPCHARP(input, shift); \ size_t i; \ for (i = 0; i < sizeof(x); INC_PCHARP(tmp, 1), i++) \ x[i] = EXTRACT_PCHARP(tmp); \ } \ (SVAL).u.float_number = fun(x); \ } while (0) #define EXTRACT_DOUBLE(SVAL, input, shift, fun) do { \ char x[8]; \ if (shift == 0) { \ memcpy(x, input, sizeof(x)); \ } else { \ PCHARP tmp = MKPCHARP(input, shift); \ size_t i; \ for (i = 0; i < sizeof(x); INC_PCHARP(tmp, 1), i++) \ x[i] = EXTRACT_PCHARP(tmp); \ } \ (SVAL).u.float_number = fun(x); \ } while (0) static struct pike_string * NOINLINE_UNALIGNED get_string_slice( void *input, int shift, ptrdiff_t offset, ptrdiff_t len, struct pike_string *str ) { if( !shift && str ) return string_slice( str, offset, len ); return make_shared_binary_pcharp(MKPCHARP(((char *)input)+(offset<<shift),shift), len); } /* INT32 very_low_sscanf_{0,1,2}_{0,1,2}(p_wchar *input, ptrdiff_t input_len, * p_wchar *match, ptrdiff_t match_len, * ptrdiff_t *chars_matched, * int *success, int flags) * * Perform the actual parsing. * * Arguments: * input, input_len Input data to parse. * match, match_len Format string. * chars_matched Gets set to the number of characters * in the input that were advanced. * success Gets set to 1 on success. * flags Operating mode. * * Returns: * Returns the number of %-directives that were successfully matched. * Pushes non-ignored matches on the Pike stack in the order they * were matched. * * FIXME: success is only used internally, and should probably be * gotten rid of. */ #define MK_VERY_LOW_SSCANF(INPUT_SHIFT, MATCH_SHIFT) \ static INT32 PIKE_CONCAT4(very_low_sscanf_,INPUT_SHIFT,_,MATCH_SHIFT)( \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *input, \ ptrdiff_t input_len, \ PIKE_CONCAT(p_wchar, MATCH_SHIFT) *match, \ ptrdiff_t match_len, \ ptrdiff_t *chars_matched, \ int *success, \ struct pike_string *pstr, \ int flags) \ { \ struct svalue sval; \ INT32 matches, arg; \ ptrdiff_t cnt, eye, start_eye, e, field_length = 0, truncated = 0; \ int no_assign = 0, minus_flag = 0, plus_flag = 0, truncate = 0; \ struct sscanf_set set; \ \ \ set.a = 0; \ success[0] = 0; \ \ eye = arg = matches = 0; \ \ for(cnt = 0; cnt < match_len; cnt++) \ { \ for(;cnt<match_len;cnt++) \ { \ if(match[cnt]=='%') \ { \ if(match[cnt+1]=='%') \ { \ cnt++; \ }else{ \ break; \ } \ } \ if(eye>=input_len || input[eye]!=match[cnt]) \ { \ chars_matched[0]=eye; \ return matches; \ } \ eye++; \ } \ if(cnt>=match_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ \ DO_IF_DEBUG( \ if(match[cnt]!='%' || match[cnt+1]=='%') \ { \ Pike_fatal("Failed to escape in sscanf.\n"); \ } \ ); \ \ no_assign=0; \ field_length=-1; \ minus_flag=0; \ plus_flag=0; \ truncate=0; \ start_eye = eye; \ \ cnt++; \ if(cnt>=match_len) \ Pike_error("Missing format specifier in sscanf format string.\n"); \ \ while(1) \ { \ switch(match[cnt]) \ { \ case '*': \ no_assign=1; \ cnt++; \ if(cnt>=match_len) \ Pike_error("Missing format specifier in ignored sscanf " \ "format string.\n"); \ continue; \ \ case '0': case '1': case '2': case '3': case '4': \ case '5': case '6': case '7': case '8': case '9': \ { \ PCHARP t; \ field_length = STRTOL_PCHARP(MKPCHARP(match+cnt, MATCH_SHIFT), \ &t,10); \ cnt = SUBTRACT_PCHARP(t, MKPCHARP(match, MATCH_SHIFT)); \ continue; \ } \ \ case '-': \ minus_flag=1; \ cnt++; \ continue; \ \ case '+': \ plus_flag=1; \ cnt++; \ continue; \ \ case '!': \ truncate=1; \ cnt++; \ continue; \ \ case '{': \ { \ ONERROR err; \ ptrdiff_t tmp; \ for(e=cnt+1,tmp=1;tmp;e++) \ { \ if(e>=match_len) \ { \ Pike_error("Missing %%} in format string.\n"); \ UNREACHABLE(break); \ } \ if(match[e]=='%') \ { \ switch(match[e+1]) \ { \ case '%': e++; break; \ case '}': tmp--; break; \ case '{': tmp++; break; \ } \ } \ } \ SET_SVAL(sval, T_ARRAY, 0, array, allocate_array(0)); \ SET_ONERROR(err, do_free_array, sval.u.array); \ \ while(input_len-eye) \ { \ int yes; \ struct svalue *save_sp=Pike_sp; \ PIKE_CONCAT4(very_low_sscanf_, INPUT_SHIFT, _, MATCH_SHIFT)( \ input+eye, \ input_len-eye, \ match+cnt+1, \ e-cnt-2, \ &tmp, \ &yes,0,flags); \ if(yes && tmp) \ { \ f_aggregate((INT32)(Pike_sp-save_sp)); \ sval.u.array=append_array(sval.u.array,Pike_sp-1); \ pop_stack(); \ eye+=tmp; \ }else{ \ pop_n_elems(Pike_sp-save_sp); \ break; \ } \ } \ cnt=e; \ UNSET_ONERROR(err); \ break; \ } \ \ case 'c': \ { \ INPUT_IS_WIDE( \ int e; \ ) \ SET_SVAL(sval, T_INT, NUMBER_NUMBER, integer, 0); \ if(field_length == -1) \ { \ if(eye+1 > input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ sval.u.integer=input[eye]; \ eye++; \ break; \ } \ if(eye+field_length > input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ INPUT_IS_WIDE( \ for(e=0;e<field_length;e++) \ { \ if((unsigned INT32) input[eye+e] > 255) \ { \ chars_matched[0]=eye; \ return matches; \ } \ } \ ) \ sval.u.integer=0; \ if (minus_flag) \ { \ int pos=0; \ if (field_length >= 0) { \ pos = (eye += field_length); \ } \ if (plus_flag && (--field_length >= 0)) { \ sval.u.integer = (signed char)input[--pos]; \ } \ while(--field_length >= 0) \ { \ if(INT_TYPE_LSH_OVERFLOW(sval.u.integer, 8)) \ { \ push_int(sval.u.integer); \ convert_stack_top_to_bignum(); \ \ while(field_length-- >= 0) \ { \ push_int(8); \ o_lsh(); \ push_int(input[--pos]); \ o_or(); \ } \ dmalloc_touch_svalue(Pike_sp-1); \ sval=*--Pike_sp; \ break; \ } \ sval.u.integer<<=8; \ sval.u.integer |= input[--pos]; \ } \ } else { \ if (plus_flag && (--field_length >= 0)) { \ sval.u.integer = (signed char)input[eye++]; \ } \ while(--field_length >= 0) \ { \ if(INT_TYPE_LSH_OVERFLOW(sval.u.integer, 8)) \ { \ push_int(sval.u.integer); \ convert_stack_top_to_bignum(); \ \ while(field_length-- >= 0) \ { \ push_int(8); \ o_lsh(); \ push_int(input[eye]); \ o_or(); \ eye++; \ } \ dmalloc_touch_svalue(Pike_sp-1); \ sval=*--Pike_sp; \ break; \ } \ sval.u.integer<<=8; \ sval.u.integer |= input[eye]; \ eye++; \ } \ } \ break; \ } \ \ case 'H': \ { \ unsigned long len=0; \ if(field_length == -1) \ field_length=1; \ if(field_length == 0) \ Pike_error("%%H size field is 0.\n"); \ if(eye+field_length > input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ INPUT_IS_WIDE ( \ for(e=0;e<field_length;e++) \ { \ if((unsigned INT32) input[eye+e] > 255) \ { \ chars_matched[0]=eye; \ return matches; \ } \ } \ ); \ if (minus_flag) \ { \ int pos=0; \ pos = (eye += field_length); \ while(--field_length >= 0) \ { \ len<<=8; \ len |= input[--pos]; \ } \ } else { \ while(--field_length >= 0) \ { \ len<<=8; \ len |= input[eye]; \ eye++; \ } \ } \ if(len > (unsigned long)(input_len-eye)) \ { \ chars_matched[0]=eye-field_length; \ return matches; \ } \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ PIKE_CONCAT(make_shared_binary_string, \ INPUT_SHIFT)(input+eye, len)); \ } \ eye+=len; \ break; \ } \ \ case 'b': \ case 'o': \ case 'd': \ case 'u': \ case 'x': \ case 'D': \ case 'i': \ { \ int base = 0; \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *t; \ \ if(eye>=input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ \ switch(match[cnt]) \ { \ case 'b': base = -2; break; \ case 'o': base = -8; break; \ case 'd': base = 10; break; \ case 'u': base =-10; break; \ case 'x': base =-16; break; \ } \ \ if (flags & SSCANF_FLAG_80_COMPAT) { \ /* All integer formats were signed in Pike 8.0 */ \ if (base < 0) base = -base; \ } \ \ wide_string_to_svalue_inumber(&sval, input+eye, &t, \ base, field_length, \ INPUT_SHIFT); \ \ if(input + eye == t) \ { \ chars_matched[0]=eye; \ return matches; \ } \ eye=t-input; \ break; \ } \ \ case 'f': \ { \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *t; \ PCHARP t2; \ FLOAT_TYPE f; \ \ if(eye>=input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ f = (FLOAT_TYPE)STRTOFLOAT_PCHARP(MKPCHARP(input+eye, \ INPUT_SHIFT),&t2); \ t = (PIKE_CONCAT(p_wchar, INPUT_SHIFT) *)(t2.ptr); \ if(input + eye == t) \ { \ chars_matched[0]=eye; \ return matches; \ } \ eye=t-input; \ SET_SVAL(sval, T_FLOAT, 0, float_number, f); \ break; \ } \ \ case 'F': \ if(field_length == -1) field_length = 4; \ if(field_length != 4 && field_length != 8) \ Pike_error("Invalid IEEE width %ld in sscanf format string.\n", \ (long)field_length); \ if(eye+field_length > input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ SET_SVAL(sval, T_FLOAT, 0, float_number, 0.0); \ switch(field_length) { \ case 4: \ if (minus_flag) \ EXTRACT_FLOAT(sval, input+eye, INPUT_SHIFT, extract_float_le); \ else \ EXTRACT_FLOAT(sval, input+eye, INPUT_SHIFT, extract_float_be); \ eye += 4; \ break; \ case 8: \ if (minus_flag) \ EXTRACT_DOUBLE(sval, input+eye, INPUT_SHIFT, extract_double_le); \ else \ EXTRACT_DOUBLE(sval, input+eye, INPUT_SHIFT, extract_double_be); \ eye += 8; \ break; \ } \ break; \ \ case 's': \ if(field_length != -1) \ { \ if(input_len - eye < field_length) \ { \ chars_matched[0]=eye; \ return matches; \ } \ \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ get_string_slice(input,INPUT_SHIFT,eye, \ field_length,pstr)); \ } \ eye+=field_length; \ break; \ } \ \ if(cnt+1>=match_len) \ { \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ get_string_slice(input,INPUT_SHIFT,eye, \ input_len-eye,pstr)); \ } \ eye=input_len; \ break; \ }else{ \ PIKE_CONCAT(p_wchar, MATCH_SHIFT) *end_str_start; \ PIKE_CONCAT(p_wchar, MATCH_SHIFT) *end_str_end; \ PIKE_CONCAT(p_wchar, MATCH_SHIFT) *s=0; \ PIKE_CONCAT(p_wchar, MATCH_SHIFT) *p=0; \ int contains_percent_percent; \ ptrdiff_t start, new_eye; \ \ e = cnt; \ start=eye; \ end_str_start=match+cnt+1; \ \ s=match+cnt+1; \ test_again: \ if(*s=='%') \ { \ s++; \ if(*s=='*') s++; \ set.neg=0; \ switch(*s) \ { \ case 0: \ /* FIXME: Should really look at the match len */ \ Pike_error("%% without conversion specifier.\n"); \ break; \ \ case 'n': \ s++; \ /* Advance the end string start pointer */ \ end_str_start = s; \ e = s - match; \ goto test_again; \ \ case 's': \ Pike_error("Illegal to have two adjecent %%s.\n"); \ UNREACHABLE(return 0); \ \ /* sscanf("foo-bar","%s%d",a,b) might not work as expected */ \ case 'd': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='9';e++) set.c[e]=0; \ set.c['-']=0; \ goto match_set; \ \ case 'u': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='9';e++) set.c[e]=0; \ goto match_set; \ \ case 'o': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='7';e++) set.c[e]=0; \ goto match_set; \ \ case 'x': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='9';e++) set.c[e]=0; \ for(e='a';e<='f';e++) set.c[e]=0; \ goto match_set; \ \ case 'D': \ case 'i': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='9';e++) set.c[e]=0; \ set.c['-']=0; \ goto match_set; \ \ case 'f': \ memset(set.c, 1, sizeof(set.c)); \ for(e='0';e<='9';e++) set.c[e]=0; \ set.c['.']=set.c['-']=0; \ goto match_set; \ \ case '[': /* oh dear */ \ PIKE_CONCAT(read_set,MATCH_SHIFT)(match, \ s-match+1, \ &set, \ match_len); \ set.neg=!set.neg; \ goto match_set; \ } \ } \ \ contains_percent_percent=0; \ \ for(;e<match_len;e++) \ { \ if(match[e]=='%') \ { \ if(match[e+1]=='%') \ { \ contains_percent_percent=1; \ e++; \ }else{ \ break; \ } \ } \ } \ \ end_str_end=match+e; \ \ if (end_str_end == end_str_start) { \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ get_string_slice(input,INPUT_SHIFT,eye, \ input_len-eye,pstr)); \ } \ eye=input_len; \ break; \ } else if(!contains_percent_percent) \ { \ struct pike_mem_searcher searcher; \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *s2; \ pike_init_memsearch(&searcher, \ MKPCHARP(end_str_start, MATCH_SHIFT), \ end_str_end - end_str_start, \ input_len - eye); \ s2 = searcher.mojt.vtab-> PIKE_CONCAT(func,INPUT_SHIFT) \ (searcher.mojt.data, input+eye, input_len-eye); \ if(!s2) \ { \ chars_matched[0]=eye; \ return matches; \ } \ eye=s2-input; \ new_eye=eye+end_str_end-end_str_start; \ }else{ \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *p2 = NULL; \ for(;eye<input_len;eye++) \ { \ p2=input+eye; \ for(s=end_str_start;s<end_str_end;s++,p2++) \ { \ if(*s!=*p2) break; \ if(*s=='%') s++; \ } \ if(s==end_str_end) \ break; \ } \ if(eye==input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ new_eye=p2-input; \ } \ \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ get_string_slice(input,INPUT_SHIFT,start, \ eye-start,pstr)); \ } \ \ cnt=end_str_end-match-1; \ eye=new_eye; \ break; \ } \ \ case '[': \ cnt=PIKE_CONCAT(read_set,MATCH_SHIFT)(match,cnt+1, \ &set,match_len); \ \ match_set: \ { \ int len = input_len; \ if (field_length != -1) { \ len = eye + field_length; \ if (len > input_len) { \ /* Mismatch -- too little data */ \ chars_matched[0]=eye; \ return matches; \ } \ } \ for(e=eye;eye<len;eye++) \ { \ INPUT_IS_WIDE( \ if((unsigned INT32) input[eye] < sizeof(set.c)) \ { \ ) \ if(set.c[input[eye]] == set.neg) \ break; \ INPUT_IS_WIDE( \ }else{ \ if(set.a) \ { \ INT32 x; \ struct svalue tmp; \ SET_SVAL(tmp, T_INT, NUMBER_NUMBER, \ integer, input[eye]); \ x=switch_lookup(set.a, &tmp); \ if( set.neg != (x<0 && (x&1)) ) break; \ }else{ \ if(!set.neg) break; \ } \ } \ ) \ } \ if ((field_length != -1) && (eye != len)) { \ /* Couldn't read the entire field. Fail. */ \ chars_matched[0]=e; \ return matches; \ } \ } \ if(set.a) { free_array(set.a); set.a=0; } \ if (no_assign) { \ no_assign = 2; \ } else { \ SET_SVAL(sval, T_STRING, 0, string, \ get_string_slice(input,INPUT_SHIFT,e, \ eye-e,pstr)); \ } \ break; \ \ case 'O': \ { \ PIKE_CONCAT(p_wchar, INPUT_SHIFT) *cont; \ if(eye>=input_len) \ { \ chars_matched[0]=eye; \ return matches; \ } \ if ((field_length == -1) || \ ((input_len - eye) < field_length)) \ field_length = input_len - eye; \ \ cont = \ pcharp_to_svalue_percent_o(&sval, \ MKPCHARP(input+eye, INPUT_SHIFT), \ field_length); \ if(!cont) \ { \ chars_matched[0]=eye; \ return matches; \ } \ eye = cont-input; \ \ break; \ } \ \ case 'n': \ SET_SVAL(sval, T_INT, NUMBER_NUMBER, integer, \ (INT32)(eye - truncated)); \ break; \ \ default: \ Pike_error("Unknown sscanf token %%%c(0x%02x)\n", \ match[cnt], match[cnt]); \ } \ break; \ } \ matches++; \ if (truncate) { \ truncated += eye - start_eye; \ } \ \ if(no_assign) \ { \ if (no_assign == 1) \ free_svalue(&sval); \ } else { \ check_stack(1); \ *Pike_sp++=sval; \ dmalloc_touch_svalue(Pike_sp-1); \ DO_IF_DEBUG(INVALIDATE_SVAL(sval)); \ } \ } \ chars_matched[0]=eye; \ success[0]=1; \ return matches; \ } /* Confusing? Yes - Hubbe */ /* Now slightly less confusing macro names, at least. /mast */ /* MATCH_IS_WIDE(X) is X if the match set is wide. * INPUT_IS_WIDE(X) is X if the input is wide. */ #define MATCH_IS_WIDE(X) #define INPUT_IS_WIDE(X) MKREADSET(0) MK_VERY_LOW_SSCANF(0,0) #undef INPUT_IS_WIDE #define INPUT_IS_WIDE(X) X MK_VERY_LOW_SSCANF(1,0) MK_VERY_LOW_SSCANF(2,0) #undef MATCH_IS_WIDE #define MATCH_IS_WIDE(X) X MKREADSET(1) MKREADSET(2) #undef INPUT_IS_WIDE #define INPUT_IS_WIDE(X) MK_VERY_LOW_SSCANF(0,1) MK_VERY_LOW_SSCANF(0,2) #undef INPUT_IS_WIDE #define INPUT_IS_WIDE(X) X MK_VERY_LOW_SSCANF(1,1) MK_VERY_LOW_SSCANF(2,1) MK_VERY_LOW_SSCANF(1,2) MK_VERY_LOW_SSCANF(2,2) /* */ INT32 low_sscanf_pcharp(PCHARP input, ptrdiff_t len, PCHARP format, ptrdiff_t format_len, ptrdiff_t *chars_matched, int flags) { int ok; check_c_stack(sizeof(struct sscanf_set)*2 + 512); switch( input.shift*3 + format.shift ) { case 0: return very_low_sscanf_0_0(input.ptr, len,format.ptr, format_len, chars_matched, &ok, 0, flags); case 1: return very_low_sscanf_0_1(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 2: return very_low_sscanf_0_2(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 3: return very_low_sscanf_1_0(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 4: return very_low_sscanf_1_1(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 5: return very_low_sscanf_1_2(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 6: return very_low_sscanf_2_0(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 7: return very_low_sscanf_2_1(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); case 8: return very_low_sscanf_2_2(input.ptr, len, format.ptr, format_len, chars_matched, &ok, 0, flags); } UNREACHABLE(return 0); } /* Simplified interface to very_low_sscanf_{0,1,2}_{0,1,2}(). */ INT32 low_sscanf(struct pike_string *data, struct pike_string *format, INT32 flags) { ptrdiff_t matched_chars; int x; check_c_stack(sizeof(struct sscanf_set)*2 + 512); switch(data->size_shift*3 + format->size_shift) { /* input_shift : match_shift */ case 0: /* 0 : 0 */ return very_low_sscanf_0_0(STR0(data), data->len, STR0(format), format->len, &matched_chars, &x, data, flags); break; case 1: /* 0 : 1 */ return very_low_sscanf_0_1(STR0(data), data->len, STR1(format), format->len, &matched_chars, &x, data, flags); break; case 2: /* 0 : 2 */ return very_low_sscanf_0_2(STR0(data), data->len, STR2(format), format->len, &matched_chars, &x, data, flags); break; case 3: /* 1 : 0 */ return very_low_sscanf_1_0(STR1(data), data->len, STR0(format), format->len, &matched_chars, &x, data, flags); break; case 4: /* 1 : 1 */ return very_low_sscanf_1_1(STR1(data), data->len, STR1(format), format->len, &matched_chars, &x, data, flags); break; case 5: /* 1 : 2 */ return very_low_sscanf_1_2(STR1(data), data->len, STR2(format), format->len, &matched_chars, &x, data, flags); break; case 6: /* 2 : 0 */ return very_low_sscanf_2_0(STR2(data), data->len, STR0(format), format->len, &matched_chars, &x, data, flags); break; case 7: /* 2 : 1 */ return very_low_sscanf_2_1(STR2(data), data->len, STR1(format), format->len, &matched_chars, &x, data, flags); break; case 8: /* 2 : 2 */ return very_low_sscanf_2_2(STR2(data), data->len, STR2(format), format->len, &matched_chars, &x, data, flags); break; } UNREACHABLE(return 0); } /*! @decl int sscanf(string data, string format, mixed ... lvalues) *! *! The purpose of sscanf is to match a string @[data] against a @[format] *! string and place the matching results into a list of variables. The list *! of @[lvalues] are destructively modified (which is only possible because *! sscanf really is a special form, rather than a pike function) with the values *! extracted from the @[data] according to the @[format] specification. Only *! the variables up to the last matching directive of the format string are *! touched. *! *! The @[format] string may contain strings separated by special matching *! directives like @tt{%d@}, @tt{%s@} @tt{%c@} and @tt{%f@}. Every such *! directive corresponds to one of the @[lvalues], in the order they are listed. *! An lvalue is the name of a variable, a name of a local variable, an index *! into an array, mapping or object. It is because of these lvalues that sscanf *! can not be implemented as a normal function. *! *! Whenever a percent character is found in the format string, a match is *! performed, according to which operator and modifiers follow it: *! *! @string *! @value "%b" *! Reads a binary integer (@expr{"0101"@} makes @expr{5@}) *! @value "%d" *! Reads a decimal integer (@expr{"0101"@} makes @expr{101@}). *! @value "%o" *! Reads an octal integer (@expr{"0101"@} makes @expr{65@}). *! @value "%x" *! Reads a hexadecimal integer (@expr{"0101"@} makes @expr{257@}). *! @value "%D" *! Reads an integer that is either octal (leading zero), *! hexadecimal (leading @expr{0x@}) or decimal. (@expr{"0101"@} makes *! @expr{65@}). *! @value "%c" *! Reads one character and returns it as an integer *! (@expr{"0101"@} makes @expr{48@}, or @expr{'0'@}, leaving *! @expr{"101"@} for later directives). Using the field width and *! endianness modifiers, you can decode integers of any size and *! endianness. For example @expr{"%-2c"@} decodes @expr{"0101"@} *! into @expr{12592@}, leaving @expr{"01"@} for later directives. *! The sign modifiers can be used to modify the signature of the *! data, making @expr{"%+1c"@} decode @expr{"ä"@} into *! @expr{-28@}. *! @value "%n" *! Returns the current character offset in @[data]. *! Note that any characters matching fields scanned with the *! @expr{"!"@}-modifier are removed from the count (see below). *! @value "%f" *! Reads a float ("0101" makes 101.0). *! @value "%F" *! Reads a float encoded according to the IEEE single precision *! binary format (@expr{"0101"@} makes @expr{6.45e-10@}, *! approximately). Given a field width modifier of 8 (4 is the *! default), the data will be decoded according to the IEEE *! double precision binary format instead. (You will however *! still get a float, unless your pike was compiled with the *! configure argument @tt{--with-double-precision@}.) *! @value "%s" *! Reads a string. If followed by %d, %s will only read non-numerical *! characters. If followed by a %[], %s will only read characters not *! present in the set. If followed by normal text, %s will match all *! characters up to but not including the first occurrence of that text. *! @value "%H" *! Reads a Hollerith-encoded string, i.e. first reads the length *! of the string and then that number of characters. The size and *! byte order of the length descriptor can be modified in the *! same way as @tt{%c@}. As an example @expr{"%2H"@} first reads *! @expr{"%2c"@} and then the resulting number of characters. *! @value "%[set]" *! Matches a string containing a given set of characters (those given *! inside the brackets). Ranges of characters can be defined by using *! a minus character between the first and the last character to be *! included in the range. Example: @expr{%[0-9H]@} means any number or 'H'. *! Note that sets that includes the character '-' must have it first *! (not possible in complemented sets, see below) or last in the brackets *! to avoid having a range defined. Sets including the character ']' must *! list this first too. If both '-' and ']' should be included *! then put ']' first and '-' last. It is not possible to make a range *! that ends with ']'; make the range end with '\' instead and put ']' *! at the beginning of the set. Likewise it is generally not possible *! to have a range start with '-'; make the range start with '.' instead *! and put '-' at the end of the set. If the first character after the *! [ bracket is '^' (%[^set]), and this character does not begin a *! range, it means that the set is complemented, which is to say that *! any character except those inside brackets is matched. To include '-' *! in a complemented set, it must be put last, not first. To include '^' *! in a non-complemented set, it can be put anywhere but first, or be *! specified as a range ("^-^"). *! @value "%{format%}" *! Repeatedly matches 'format' as many times as possible and assigns an *! array of arrays with the results to the lvalue. *! @value "%O" *! Match a Pike constant, such as string or integer (currently only *! integer, string and character constants are functional). *! @value "%%" *! Match a single percent character (hence this is how you quote the % *! character to just match, and not start an lvalue matcher directive). *! @endstring *! *! Similar to @[sprintf], you may supply modifiers between the % character *! and the operator, to slightly change its behaviour from the default: *! *! @string *! @value "*" *! The operator will only match its argument, without assigning any *! variable. *! @value number *! You may define a field width by supplying a numeric modifier. *! This means that the format should match that number of *! characters in the input data; be it a @i{number@} characters *! long string, integer or otherwise (@expr{"0101"@} using the *! format %2c would read an unsigned short @expr{12337@}, leaving *! the final @expr{"01"@} for later operators, for instance). *! @value "-" *! Supplying a minus sign toggles the decoding to read the data encoded *! in little-endian byte order, rather than the default network *! (big-endian) byte order. *! @value "+" *! Interpret the data as a signed entity. In other words, *! @expr{"%+1c"@} will read @expr{"\xFF"@} as @expr{-1@} instead *! of @expr{255@}, as @expr{"%1c"@} would have. *! @value "!" *! Ignore the matched characters with respect to any following *! @expr{"%n"@}. *! @endstring *! *! @note *! Sscanf does not use backtracking. Sscanf simply looks at the format string *! up to the next % and tries to match that with the string. It then proceeds *! to look at the next part. If a part does not match, sscanf immediately *! returns how many % were matched. If this happens, the lvalues for % that *! were not matched will not be changed. *! *! @example *! @code *! // a will be assigned "oo" and 1 will be returned *! sscanf("foo", "f%s", a); *! *! // a will be 4711 and b will be "bar", 2 will be returned *! sscanf("4711bar", "%d%s", a, b); *! *! // a will be 4711, 2 will be returned *! sscanf("bar4711foo", "%*s%d", a); *! *! // a will become "test", 2 will be returned *! sscanf(" \t test", "%*[ \t]%s", a); *! *! // Remove "the " from the beginning of a string *! // If 'str' does not begin with "the " it will not be changed *! sscanf(str, "the %s", str); *! *! // It is also possible to declare a variable directly in the sscanf call; *! // another reason for sscanf not to be an ordinary function: *! *! sscanf("abc def", "%s %s", string a, string b); *! @endcode *! *! @returns *! The number of directives matched in the format string. Note that a string *! directive (%s or %[]) counts as a match even when matching just the empty *! string (which either may do). *! @seealso *! @[sprintf], @[array_sscanf] * @[parse_format] */ void o_sscanf(INT32 args) { INT32 i=0; int x; struct svalue *save_sp=Pike_sp; if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("sscanf", 1, "string"); if(TYPEOF(Pike_sp[1-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("sscanf", 2, "string"); i = low_sscanf(Pike_sp[-args].u.string, Pike_sp[1-args].u.string, 0); if(Pike_sp-save_sp > args/2-1) Pike_error("Too few arguments for sscanf format.\n"); for(x=0;x<Pike_sp-save_sp;x++) assign_lvalue(save_sp-args+2+x*2,save_sp+x); pop_n_elems(Pike_sp-save_sp +args); #ifdef PIKE_DEBUG if(Pike_interpreter.trace_level >2) { int nonblock; if((nonblock=query_nonblocking(2))) set_nonblocking(2,0); fprintf(stderr,"- Matches: %ld\n",(long)i); if(nonblock) set_nonblocking(2,1); } #endif push_int(i); } void o_sscanf_80(INT32 args) { INT32 i=0; int x; struct svalue *save_sp=Pike_sp; if(TYPEOF(Pike_sp[-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("sscanf", 1, "string"); if(TYPEOF(Pike_sp[1-args]) != T_STRING) SIMPLE_ARG_TYPE_ERROR("sscanf", 2, "string"); i = low_sscanf(Pike_sp[-args].u.string, Pike_sp[1-args].u.string, SSCANF_FLAG_80_COMPAT); if(Pike_sp-save_sp > args/2-1) Pike_error("Too few arguments for sscanf format.\n"); for(x=0;x<Pike_sp-save_sp;x++) assign_lvalue(save_sp-args+2+x*2,save_sp+x); pop_n_elems(Pike_sp-save_sp +args); #ifdef PIKE_DEBUG if(Pike_interpreter.trace_level >2) { int nonblock; if((nonblock=query_nonblocking(2))) set_nonblocking(2,0); fprintf(stderr,"- Matches: %ld\n",(long)i); if(nonblock) set_nonblocking(2,1); } #endif push_int(i); } /*! @decl array array_sscanf(string data, string format) *! *! This function works just like @[sscanf()], but returns the matched *! results in an array instead of assigning them to lvalues. This is often *! useful for user-defined sscanf strings. *! *! @seealso *! @[sscanf()], @[`/()] */ PMOD_EXPORT void f_sscanf(INT32 args) { INT32 i; struct svalue *save_sp=Pike_sp; struct array *a; check_all_args("array_sscanf",args,BIT_STRING, BIT_STRING,0); i = low_sscanf(Pike_sp[-args].u.string, Pike_sp[1-args].u.string, 0); a = aggregate_array(Pike_sp - save_sp); pop_n_elems(args); push_array(a); } PMOD_EXPORT void f_sscanf_80(INT32 args) { INT32 i; struct svalue *save_sp=Pike_sp; struct array *a; check_all_args("array_sscanf",args,BIT_STRING, BIT_STRING,0); i = low_sscanf(Pike_sp[-args].u.string, Pike_sp[1-args].u.string, SSCANF_FLAG_80_COMPAT); a = aggregate_array(Pike_sp - save_sp); pop_n_elems(args); push_array(a); } static void push_sscanf_argument_types(PCHARP format, ptrdiff_t format_len, int cnt, struct mapping *state, int flags) { for(; cnt < format_len; cnt++) { int no_assign=0; while((cnt<format_len) && (INDEX_PCHARP(format, cnt) != '%')) cnt++; cnt++; if (cnt >= format_len) break; while(1) { switch(INDEX_PCHARP(format, cnt)) { case '%': break; case '*': no_assign=1; /* FALLTHRU */ case '-': case '+': case '!': case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': cnt++; if(cnt>=format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } continue; case '{': { int e; int depth = 1; for(e=cnt+1;depth;e++) { if(e>=format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Missing %%} in format string."); break; } if(INDEX_PCHARP(format, e)=='%') { switch(INDEX_PCHARP(format, e+1)) { case '%': e++; break; case '}': depth--; break; case '{': depth++; break; } } } if (!no_assign) { type_stack_mark(); push_sscanf_argument_types(format, e, cnt+1, state, flags); if (!(depth = pop_stack_mark())) { push_type(PIKE_T_ZERO); } else { /* Join the argument types. */ while (depth > 1) { push_type(T_OR); depth--; } } push_unlimited_array_type(PIKE_T_ARRAY); push_unlimited_array_type(PIKE_T_ARRAY); } cnt = e; break; } case 'n': /* FIXME: tIntPos? */ case 'b': case 'o': case 'u': case 'x': /* Unsigned integers. */ if (!no_assign) { if (flags & SSCANF_FLAG_80_COMPAT) { /* All integer formats were signed in Pike 8.0. */ push_finished_type(int_type_string); } else { push_int_type(0, 0x7fffffff); } } break; case 'c': /* FIXME: Use the width of the input string and format_len. */ /* FALLTHRU */ case 'd': case 'D': case 'i': /* Signed integers. */ if (!no_assign) push_finished_type(int_type_string); break; case '[': { int ch; cnt++; if (cnt >= format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } if((INDEX_PCHARP(format, cnt)=='^') && (cnt+2>=format_len || (INDEX_PCHARP(format, cnt+1)!='-') || (INDEX_PCHARP(format, cnt+2)==']') )) { cnt++; if(cnt >= format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } } if(((ch = INDEX_PCHARP(format, cnt))==']') || (ch=='-')) { cnt++; if(cnt >= format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } ch = INDEX_PCHARP(format, cnt); } while(ch != ']') { if(ch == '-') { cnt++; if(cnt >= format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } if(INDEX_PCHARP(format, cnt)==']') { break; } } cnt++; if(cnt>=format_len) { yyreport(REPORT_ERROR, type_check_system_string, 0, "Error in sscanf format string."); break; } ch = INDEX_PCHARP(format, cnt); } } /* FALLTHRU */ case 's': case 'H': if (!no_assign) { struct svalue *s = simple_mapping_string_lookup(state, "sscanf_input"); if (s && (TYPEOF(*s) == PIKE_T_TYPE)) { /* Use the type of the input string. */ push_finished_type(s->u.type); } else { push_finished_type(string_type_string); } } break; case 'F': case 'f': if (!no_assign) push_finished_type(float_type_string); break; break; case 'O': if (!no_assign) push_finished_type(mixed_type_string); break; default: yyreport(REPORT_ERROR, type_check_system_string, 0, "Unknown sscanf token %%%c(0x%02x) at offset %d.", INDEX_PCHARP(format, cnt), INDEX_PCHARP(format, cnt), cnt-1); break; } break; } } } void f___handle_sscanf_format(INT32 args) { struct pike_type *res; struct pike_type *tmp; struct pike_string *attr; struct pike_string *fmt; struct pike_string *sscanf_input_string; struct pike_string *sscanf_format_string; struct pike_string *sscanf_80_format_string; struct mapping *state; int flags = 0; int found = 0; int fmt_count; #if 0 fprintf(stderr, "__handle_sscanf_format()\n"); #endif /* 0 */ if (args != 5) SIMPLE_WRONG_NUM_ARGS_ERROR("__handle_sscanf_format", 5); if (TYPEOF(Pike_sp[-5]) != PIKE_T_STRING) SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 1, "string"); if (TYPEOF(Pike_sp[-3]) != PIKE_T_TYPE) SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 3, "type"); if (TYPEOF(Pike_sp[-2]) != PIKE_T_TYPE) SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 4, "type"); if (TYPEOF(Pike_sp[-1]) != PIKE_T_MAPPING) SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 5, "mapping"); tmp = Pike_sp[-2].u.type; if ((tmp->type != PIKE_T_FUNCTION) && (tmp->type != T_MANY)) { SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 4, "type(function)"); } state = Pike_sp[-1].u.mapping; MAKE_CONST_STRING(sscanf_input_string, "sscanf_input"); if (Pike_sp[-5].u.string == sscanf_input_string) { mapping_string_insert(state, sscanf_input_string, Pike_sp-3); pop_n_elems(args); push_undefined(); return; } if (TYPEOF(Pike_sp[-4]) != PIKE_T_STRING) { if (TYPEOF(Pike_sp[-4]) == PIKE_T_INT) { pop_n_elems(args); push_undefined(); return; } SIMPLE_ARG_TYPE_ERROR("__handle_sscanf_format", 2, "string"); } MAKE_CONST_STRING(sscanf_format_string, "sscanf_format"); MAKE_CONST_STRING(sscanf_80_format_string, "sscanf_80_format"); if (Pike_sp[-5].u.string != sscanf_format_string) { if (Pike_sp[-5].u.string != sscanf_80_format_string) { pop_n_elems(args); push_undefined(); return; } flags |= SSCANF_FLAG_80_COMPAT; } fmt = Pike_sp[-4].u.string; MAKE_CONST_STRING(attr, "sscanf_args"); #if 0 fprintf(stderr, "Checking sscanf format: \"%s\": ", fmt->str); simple_describe_type(Pike_sp[-2].u.type); fprintf(stderr, "\n"); #endif /* 0 */ type_stack_mark(); type_stack_mark(); for (; tmp; tmp = tmp->cdr) { struct pike_type *arg = tmp->car; int array_cnt = 0; while(arg) { switch(arg->type) { case PIKE_T_ATTRIBUTE: if (arg->car == (struct pike_type *)attr) break; /* FALLTHRU */ case PIKE_T_NAME: arg = arg->cdr; continue; case PIKE_T_ARRAY: array_cnt++; arg = arg->cdr; continue; default: arg = NULL; break; } break; } if (arg) { type_stack_mark(); push_sscanf_argument_types(MKPCHARP(fmt->str, fmt->size_shift), fmt->len, 0, state, flags); if (!array_cnt) { pop_stack_mark(); push_type(T_VOID); /* No more args */ while (tmp->type == PIKE_T_FUNCTION) { tmp = tmp->cdr; } push_finished_type(tmp->cdr); /* return type */ push_reverse_type(T_MANY); fmt_count = pop_stack_mark(); while (fmt_count > 1) { push_reverse_type(T_FUNCTION); fmt_count--; } res = pop_unfinished_type(); pop_n_elems(args); push_type_value(res); #if 0 fprintf(stderr, " ==> "); simple_describe_type(res); fprintf(stderr, "\n"); #endif /* 0 */ return; } else { if (!(fmt_count = pop_stack_mark())) { push_type(PIKE_T_ZERO); } else { /* Join the argument types into the array. */ while (fmt_count > 1) { push_type(T_OR); fmt_count--; } } while (array_cnt--) { push_unlimited_array_type(PIKE_T_ARRAY); } found = 1; } } else { push_finished_type(tmp->car); } if (tmp->type == T_MANY) { /* Get the return type. */ tmp = tmp->cdr; break; } } if (found) { /* Found, but inside an array, so we need to build the function * type here. */ push_finished_type(tmp); /* Return type. */ push_reverse_type(T_MANY); fmt_count = pop_stack_mark(); while (fmt_count > 1) { push_reverse_type(T_FUNCTION); fmt_count--; } res = pop_unfinished_type(); pop_n_elems(args); push_type_value(res); #if 0 fprintf(stderr, " ==> "); simple_describe_type(res); fprintf(stderr, "\n"); #endif /* 0 */ return; } else if (tmp) { /* Check if it's in the return type. */ struct pike_type *arg = tmp; int array_cnt = 0; while(arg) { switch(arg->type) { case PIKE_T_ATTRIBUTE: if (arg->car == (struct pike_type *)attr) break; /* FALLTHRU */ case PIKE_T_NAME: arg = arg->cdr; continue; case PIKE_T_ARRAY: array_cnt++; arg = arg->cdr; continue; default: arg = NULL; break; } break; } if (arg) { type_stack_mark(); push_sscanf_argument_types(MKPCHARP(fmt->str, fmt->size_shift), fmt->len, 0, state, flags); /* Join the argument types. */ if (!(fmt_count = pop_stack_mark())) { push_type(PIKE_T_ZERO); } else while (fmt_count > 2) { push_type(T_OR); fmt_count--; } while (array_cnt--) { push_unlimited_array_type(PIKE_T_ARRAY); } /* Rebuild the function type backwards. */ push_reverse_type(T_MANY); fmt_count = pop_stack_mark(); while (fmt_count > 1) { push_reverse_type(T_FUNCTION); fmt_count--; } res = pop_unfinished_type(); pop_n_elems(args); push_type_value(res); #if 0 fprintf(stderr, " ==> "); simple_describe_type(res); fprintf(stderr, "\n"); #endif /* 0 */ return; } } /* No marker found. */ #if 0 fprintf(stderr, " ==> No marker found.\n"); #endif /* 0 */ pop_stack_mark(); type_stack_pop_to_mark(); pop_n_elems(args); push_undefined(); }

pike.git/ src/ sscanf.c > a78f710ccf4cf5d5ea7b2cbf507ab4310dade945 [Annotate]