pike.git/src/lexer.h:5f58bdeecb41320455102b95b9180cba3c5d04f5

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 /* || 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. */ /* * Lexical analyzer template. * Based on lex.c 1.62 * * Henrik Grubbström 1999-02-20 */ #ifndef SHIFT #error Internal error: SHIFT not defined #endif /* * Definitions */ /* Generic */ #define GOBBLE(c) (LOOK()==c?(SKIP(),1):0) #define SKIPSPACE() do { while(isspace(LOOK()) && LOOK()!='\n') SKIP(); }while(0) #define SKIPWHITE() do { while(isspace(LOOK())) SKIP(); }while(0) #define SKIPUPTO(X) do { while(LOOK()!=(X) && LOOK()) SKIP(); }while(0) #if (SHIFT == 0) #define WCHAR p_wchar0 #define LOOK() EXTRACT_UCHAR(lex->pos) #define GETC() EXTRACT_UCHAR(lex->pos++) #define SKIP() lex->pos++ #define SKIPN(N) (lex->pos += (N)) #define READBUF(X) do { \ int C; \ buf = lex->pos; \ while((C = LOOK()) && (X)) \ lex->pos++; \ len = (size_t)(lex->pos - buf); \ } while(0) #define TWO_CHAR(X,Y) ((X)<<8)+(Y) #define ISWORD(X) ((len == CONSTANT_STRLEN(X)) && !memcmp(buf,X,len)) /* * Function renaming */ #define parse_esc_seq parse_esc_seq0 #define yylex yylex0 #define low_yylex low_yylex0 #define lex_atoi atoi #define lex_strtol strtol #define lex_strtod my_strtod #define lex_isidchar isidchar #else /* SHIFT != 0 */ #define LOOK() INDEX_CHARP(lex->pos,0,SHIFT) #define SKIP() (lex->pos += (1<<SHIFT)) #define SKIPN(N) (lex->pos += (N) < 0 ? -(-(N) << SHIFT) : ((N)<<SHIFT)) #define GETC() (SKIP(),INDEX_CHARP(lex->pos-(1<<SHIFT),0,SHIFT)) #define READBUF(X) do { \ int C; \ buf = lex->pos; \ while((C = LOOK()) && (X)) \ SKIP(); \ len = (size_t)((lex->pos - buf) >> SHIFT); \ } while(0) #define TWO_CHAR(X,Y) ((X)<<8)+(Y) #define ISWORD(X) ((len == strlen(X)) && low_isword(buf, X, len)) #if (SHIFT == 1) #define WCHAR p_wchar1 /* Function renaming */ #define low_isword low_isword1 #define parse_esc_seq parse_esc_seq1 #define char_const char_const1 #define readstring readstring1 #define yylex yylex1 #define low_yylex low_yylex1 #define lex_atoi lex_atoi1 #define lex_strtol lex_strtol1 #define lex_strtod lex_strtod1 #else /* SHIFT != 1 */ #define WCHAR p_wchar2 /* Function renaming */ #define low_isword low_isword2 #define parse_esc_seq parse_esc_seq2 #define char_const char_const2 #define readstring readstring2 #define yylex yylex2 #define low_yylex low_yylex2 #define lex_atoi lex_atoi2 #define lex_strtol lex_strtol2 #define lex_strtod lex_strtod2 #endif /* SHIFT == 1 */ #define lex_isidchar(X) ((((unsigned) X)>=256) || isidchar(X)) static int low_isword(char *buf, char *X, size_t len) { while(len--) { if (INDEX_CHARP(buf, len, SHIFT) != ((unsigned char *)X)[len]) { return 0; } } return 1; } static int lex_atoi(char *buf) { /* NOTE: Cuts at 63 digits */ char buff[64]; int i=0; int c; while(((c = INDEX_CHARP(buf, i, SHIFT))>='0') && (c <= '9') && (i < 63)) { buff[i++] = c; } buff[i] = 0; return atoi(buff); } static long lex_strtol(char *buf, char **end, int base) { PCHARP foo; long ret; ret=STRTOL_PCHARP(MKPCHARP(buf,SHIFT),&foo,base); if(end) end[0]=(char *)foo.ptr; return ret; } static double lex_strtod(char *buf, char **end) { PCHARP foo; double ret; ret=STRTOD_PCHARP(MKPCHARP(buf,SHIFT),&foo); if(end) end[0]=(char *)foo.ptr; return ret; } #endif /* SHIFT == 0 */ /*** Lexical analyzing ***/ /* String escape sequences * * Sequence Character * \\ backslash * \[0-7]* octal escape * \a alert (BEL) * \b backspace (BS) * \d[0-9]* decimal escape * \e escape (ESC) * \f form-feed (FF) * \n newline (LF) * \r carriage-return (CR) * \t tab (HT) * \v vertical-tab (VT) * \x[0-9a-fA-F]* hexadecimal escape * \u+[0-9a-fA-F]{4,4} 16 bit unicode style escape * \U+[0-9a-fA-F]{8,8} 32 bit unicode style escape * * If there are more than one u or U in the unicode style escapes, one * is removed and the escape remains otherwise intact. */ int parse_esc_seq (WCHAR *buf, p_wchar2 *chr, ptrdiff_t *len) /* buf is assumed to be after the backslash. Return codes: * 0: All ok. The char's in *chr, consumed length in *len. * 1: Found a literal \r at *buf. * 2: Found a literal \n at *buf. * 3: Found a literal \0 at *buf. * 4: Too large octal escape. *len is gobbled to the end of it all. * 5: Too large hexadecimal escape. *len is gobbled to the end of it all. * 6: Too large decimal escape. *len is gobbled to the end of it all. * 7: Not 4 digits in \u escape. *len is up to the last found digit. * 8: Not 8 digits in \U escape. *len is up to the last found digit. */ { ptrdiff_t l = 1; p_wchar2 c; int of = 0; switch ((c = *buf)) { case '\r': return 1; case '\n': return 2; case 0: return 3; case 'a': c = 7; break; /* BEL */ case 'b': c = 8; break; /* BS */ case 't': c = 9; break; /* HT */ case 'n': c = 10; break; /* LF */ case 'v': c = 11; break; /* VT */ case 'f': c = 12; break; /* FF */ case 'r': c = 13; break; /* CR */ case 'e': c = 27; break; /* ESC */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': { unsigned INT32 n = c-'0'; for (l = 1; buf[l] >= '0' && buf[l] < '8'; l++) { if (DO_UINT32_MUL_OVERFLOW(n, 8, &n)) of = 1; else n += buf[l] - '0'; } if (of) { *len = l; return 4; } c = (p_wchar2)n; break; } case '8': case '9': if( Pike_compiler->compiler_pass == 1 ) yywarning("%c is not a valid octal digit.", c); break; case 'x': { unsigned INT32 n=0; for (l = 1;; l++) { switch (buf[l]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (DO_UINT32_MUL_OVERFLOW(n, 16, &n)) of = 1; else n += buf[l] - '0'; continue; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': if (DO_UINT32_MUL_OVERFLOW(n, 16, &n)) of = 1; else n += buf[l] - 'a' + 10; continue; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': if (DO_UINT32_MUL_OVERFLOW(n, 16, &n)) of = 1; else n += buf[l] - 'A' + 10; continue; } break; } if (of) { *len = l; return 5; } c = (p_wchar2)n; break; } case 'd': { unsigned INT32 n=0; for (l = 1;; l++) { switch (buf[l]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (DO_UINT32_MUL_OVERFLOW(n, 10, &n) || DO_UINT32_ADD_OVERFLOW(n, buf[l] - '0', &n)) { of = 1; } continue; } break; } if (of) { *len = l; return 6; } c = (p_wchar2)n; break; } case 'u': case 'U': { /* FIXME: Do we need compat goo to turn this off? */ /* Note: Code dup in gobble_identifier in preprocessor.h. */ unsigned INT32 n = 0; int stop, longq; l = 1; if (buf[1] == c) { /* A double-u quoted escape. Convert the "\u" or "\U" to "\", * thereby shaving off a "u" or "U" from the escape * sequence. */ /* Don't check that there's a valid number of hex digits in * this case, since the encoding code that can produce them * doesn't check that. */ c = '\\'; break; } if (c == 'u') { stop = l + 4; longq = 0; } else { stop = l + 8; longq = 1; } for (; l < stop; l++) switch (buf[l]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': n = 16 * n + buf[l] - '0'; break; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': n = 16 * n + buf[l] - 'a' + 10; break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': n = 16 * n + buf[l] - 'A' + 10; break; default: *len = l; return longq ? 8 : 7; } c = (p_wchar2)n; } } *len = l; *chr = c; return 0; } static p_wchar2 char_const(struct lex *lex) { p_wchar2 c; ptrdiff_t l; switch (parse_esc_seq ((WCHAR *)lex->pos, &c, &l)) { case 0: break; case 1: SKIP(); return '\r'; case 2: SKIP(); lex->current_line++; return '\n'; case 3: yyerror("Unexpected end of file."); lex->pos -= (1<<SHIFT); return 0; case 4: case 5: case 6: if( Pike_compiler->compiler_pass == 1 ) yyerror ("Too large character value in escape."); c = -1; break; case 7: if( Pike_compiler->compiler_pass == 1 ) yyerror ("Too few hex digits in \\u escape."); return '\\'; case 8: if( Pike_compiler->compiler_pass == 1 ) yyerror ("Too few hex digits in \\U escape."); return '\\'; } SKIPN (l); return c; } static struct pike_string *readstring(struct lex *lex) { int c; struct string_builder tmp; #if (SHIFT != 0) PCHARP bufptr = { NULL, SHIFT }; #endif /* SHIFT != 0 */ init_string_builder(&tmp,0); while(1) { char *buf; size_t len; READBUF(((C > '\\') || ((C != '"') && (C != '\\') && (C != '\n')))); if (len) { #if (SHIFT == 0) string_builder_binary_strcat(&tmp, buf, len); #else /* SHIFT != 0 */ bufptr.ptr = (p_wchar0 *)buf; string_builder_append(&tmp, bufptr, len); #endif /* SHIFT == 0 */ } switch(c=GETC()) { case 0: lex->pos -= (1<<SHIFT); yyerror("End of file in string."); break; case '\n': lex->current_line++; yyerror("Newline in string."); break; case '\\': string_builder_putchar(&tmp, char_const(lex)); continue; case '"': break; default: #ifdef PIKE_DEBUG Pike_fatal("Default case in readstring() reached. c:%d\n", c); #endif /* PIKE_DEBUG */ break; } break; } return dmalloc_touch(struct pike_string *, finish_string_builder(&tmp)); } #if LEXDEBUG>4 static int low_yylex(struct lex *lex, YYSTYPE *); #endif /* LEXDEBUG>4 */ int yylex(struct lex *lex, YYSTYPE *yylval) #if LEXDEBUG>4 { int t; #if LEXDEBUG>8 fprintf(stderr, "YYLEX:\n"); #endif /* LEXDEBUG>8 */ t=low_yylex(lex, yylval); if(t<256) { fprintf(stderr,"YYLEX: '%c' (%d) at %s:%d\n",t,t,lex.current_file->str,lex.current_line); }else{ fprintf(stderr,"YYLEX: token #%d at %s:%d\n",t,lex.current_file->str,lex.current_line); } return t; } static int low_yylex(struct lex *lex, YYSTYPE *yylval) #endif /* LEXDEBUG>4 */ { INT32 c; size_t len; char *buf; #ifdef __CHECKER__ memset(yylval,0,sizeof(YYSTYPE)); #endif #ifdef MALLOC_DEBUG check_sfltable(); #endif while(1) { c = GETC(); if((c>'9') && lex_isidchar(c)) { lex->pos -= (1<<SHIFT); READBUF(lex_isidchar(C)); PIKE_MEM_WO_RANGE (yylval, sizeof (YYSTYPE)); if(len>1 && len<16) { /* NOTE: TWO_CHAR() will generate false positives with wide strings, * but that doesn't matter, since ISWORD() will fix it. */ switch(TWO_CHAR(INDEX_CHARP(buf, 0, SHIFT), INDEX_CHARP(buf, 1, SHIFT))) { case TWO_CHAR('a','r'): if(ISWORD("array")) return TOK_ARRAY_ID; break; case TWO_CHAR('a','u'): if(ISWORD("auto")) { if (Pike_compiler->compiler_pass == 1) { yywarning("auto will soon be a reserved keyword."); } break; } break; case TWO_CHAR('b','r'): if(ISWORD("break")) return TOK_BREAK; break; case TWO_CHAR('c','a'): if(ISWORD("case")) return TOK_CASE; if(ISWORD("catch")) return TOK_CATCH; break; case TWO_CHAR('c','l'): if(ISWORD("class")) return TOK_CLASS; break; case TWO_CHAR('c','o'): if(ISWORD("constant")) return TOK_CONSTANT; if(ISWORD("continue")) return TOK_CONTINUE; if(ISWORD("const")) { if (Pike_compiler->compiler_pass == 1) { yywarning("const will soon be a reserved keyword."); } break; } break; case TWO_CHAR('d','e'): if(ISWORD("default")) return TOK_DEFAULT; break; case TWO_CHAR('d','o'): if(ISWORD("do")) return TOK_DO; break; case TWO_CHAR('e','l'): if(ISWORD("else")) return TOK_ELSE; break; case TWO_CHAR('e','n'): if(ISWORD("enum")) return TOK_ENUM; break; case TWO_CHAR('e','x'): if(ISWORD("extern")) return TOK_EXTERN; break; case TWO_CHAR('f','i'): if(ISWORD("final")) return TOK_FINAL_ID; break; case TWO_CHAR('f','l'): if(ISWORD("float")) return TOK_FLOAT_ID; break; case TWO_CHAR('f','o'): if(ISWORD("for")) return TOK_FOR; if(ISWORD("foreach")) return TOK_FOREACH; break; case TWO_CHAR('f','u'): if(ISWORD("function")) return TOK_FUNCTION_ID; break; case TWO_CHAR('g','a'): if(ISWORD("gauge")) return TOK_GAUGE; break; case TWO_CHAR('g','l'): if (ISWORD("global")) return TOK_GLOBAL; break; case TWO_CHAR('i','f'): if(ISWORD("if")) return TOK_IF; break; case TWO_CHAR('i','m'): if(ISWORD("import")) return TOK_IMPORT; break; case TWO_CHAR('i','n'): if(ISWORD("int")) return TOK_INT_ID; if(ISWORD("inherit")) return TOK_INHERIT; if(ISWORD("inline")) return TOK_INLINE; break; case TWO_CHAR('l','a'): if(ISWORD("lambda")) return TOK_LAMBDA; break; case TWO_CHAR('l','o'): if(ISWORD("local")) return TOK_LOCAL_ID; break; case TWO_CHAR('m','a'): if(ISWORD("mapping")) return TOK_MAPPING_ID; break; case TWO_CHAR('m','i'): if(ISWORD("mixed")) return TOK_MIXED_ID; break; case TWO_CHAR('m','u'): if(ISWORD("multiset")) return TOK_MULTISET_ID; break; case TWO_CHAR('o','b'): if(ISWORD("object")) return TOK_OBJECT_ID; break; case TWO_CHAR('o','p'): if(ISWORD("optional")) return TOK_OPTIONAL; break; case TWO_CHAR('p','r'): if(ISWORD("program")) return TOK_PROGRAM_ID; if(ISWORD("predef")) return TOK_PREDEF; if(ISWORD("private")) return TOK_PRIVATE; if(ISWORD("protected")) return TOK_PROTECTED; break; case TWO_CHAR('p','u'): if(ISWORD("public")) return TOK_PUBLIC; break; case TWO_CHAR('r','e'): if(ISWORD("return")) return TOK_RETURN; break; case TWO_CHAR('s','s'): if(ISWORD("sscanf")) return TOK_SSCANF; break; case TWO_CHAR('s','t'): if(ISWORD("string")) return TOK_STRING_ID; if(ISWORD("static")) return TOK_STATIC; break; case TWO_CHAR('s','w'): if(ISWORD("switch")) return TOK_SWITCH; break; case TWO_CHAR('t','y'): if(ISWORD("typedef")) return TOK_TYPEDEF; if(ISWORD("typeof")) return TOK_TYPEOF; break; case TWO_CHAR('v','a'): if(ISWORD("variant")) return TOK_VARIANT; break; case TWO_CHAR('v','o'): if(ISWORD("void")) return TOK_VOID_ID; break; case TWO_CHAR('w','h'): if(ISWORD("while")) return TOK_WHILE; break; case TWO_CHAR('_','_'): if(len < 5) break; if(ISWORD("__attribute__")) return TOK_ATTRIBUTE_ID; if(ISWORD("__deprecated__")) return TOK_DEPRECATED_ID; if(ISWORD("__func__")) return TOK_FUNCTION_NAME; /* Allow triple (or more) underscore for the user, and make sure we * don't get false matches below for wide strings. */ if((INDEX_CHARP(buf, 2, SHIFT) == '_') || (INDEX_CHARP(buf, len-3, SHIFT) == '_') || (INDEX_CHARP(buf, len-2, SHIFT) != '_') || (INDEX_CHARP(buf, len-1, SHIFT) != '_') || (INDEX_CHARP(buf, 0, SHIFT) != '_') || (INDEX_CHARP(buf, 1, SHIFT) != '_')) break; { /* Double underscore before and after is reserved for keywords. */ #if (SHIFT == 0) struct pike_string *tmp = make_shared_binary_string(buf, len); #else /* SHIFT != 0 */ #if (SHIFT == 1) struct pike_string *tmp = make_shared_binary_string1((p_wchar1 *)buf, len); #else /* SHIFT != 1 */ struct pike_string *tmp = make_shared_binary_string2((p_wchar2 *)buf, len); #endif /* SHIFT == 1 */ #endif /* SHIFT == 0 */ yylval->n=mkstrnode(tmp); /* - But only for lower case US-ASCII. * - Upper case is used for symbols intended for #if constant(). */ if (tmp->size_shift) { free_string(tmp); return TOK_IDENTIFIER; } while(len--) { int c = tmp->str[len]; if ((c >= 'A') && (c <= 'Z')) { free_string(tmp); return TOK_IDENTIFIER; } } free_string(tmp); } return TOK_RESERVED; } } { #if (SHIFT == 0) struct pike_string *tmp = make_shared_binary_string(buf, len); #else /* SHIFT != 0 */ #if (SHIFT == 1) struct pike_string *tmp = make_shared_binary_string1((p_wchar1 *)buf, len); #else /* SHIFT != 1 */ struct pike_string *tmp = make_shared_binary_string2((p_wchar2 *)buf, len); #endif /* SHIFT == 1 */ #endif /* SHIFT == 0 */ yylval->n=mkstrnode(tmp); free_string(tmp); return TOK_IDENTIFIER; } } /* Note that 0 <= c <= 255 at this point. */ switch(c) { case 0: lex->pos -= (1<<SHIFT); if(lex->end != lex->pos) yyerror("Illegal character (NUL)"); #ifdef TOK_LEX_EOF return TOK_LEX_EOF; #else /* !TOK_LEX_EOF */ return 0; #endif /* TOK_LEX_EOF */ case '\n': lex->current_line++; continue; case 0x1b: case 0x9b: /* ESC or CSI */ /* Assume ANSI/DEC escape sequence. * Format supported: * <ESC>[\040-\077]+[\100-\177] * or * <CSI>[\040-\077]*[\100-\177] */ while ((c = LOOK()) && (c == ((c & 0x1f)|0x20))) { SKIP(); } if (c == ((c & 0x3f)|0x40)) { SKIP(); } else { /* FIXME: Warning here? */ } continue; case '#': SKIPSPACE(); READBUF(C!='\n' && C!=' ' && C!='\t'); switch(len>0?INDEX_CHARP(buf, 0, SHIFT):0) { case 'l': if (ISWORD("line")) { SKIPSPACE(); if (LOOK() < '0' || LOOK() > '9') goto unknown_directive; READBUF(C!='\n' && C!=' ' && C!='\t'); /* fallthrough */ } else goto unknown_directive; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': lex->current_line = lex_strtol(buf, NULL, 10)-1; SKIPSPACE(); if(GOBBLE('"')) { struct pike_string *tmp=readstring(lex); free_string(lex->current_file); lex->current_file = dmalloc_touch(struct pike_string *, tmp); } if (Pike_compiler->compiler_pass == 1 && !Pike_compiler->new_program->num_linenumbers) { /* A nested program will always get an entry right away in * language.yacc. */ store_linenumber(0, lex->current_file); #ifdef DEBUG_MALLOC if(strcmp(lex->current_file->str,"-")) debug_malloc_name(Pike_compiler->new_program, lex->current_file->str, 0); #endif } break; case 'p': if(ISWORD("pragma")) { SKIPSPACE(); READBUF(C!='\n'&&C!=' '); if (ISWORD("all_inline")) { lex->pragmas |= ID_INLINE; } else if (ISWORD("all_final")) { lex->pragmas |= ID_FINAL; } else if (ISWORD("strict_types")) { lex->pragmas |= ID_STRICT_TYPES; } else if (ISWORD("save_parent")) { lex->pragmas |= ID_SAVE_PARENT; } else if (ISWORD("dont_save_parent")) { lex->pragmas |= ID_DONT_SAVE_PARENT; } else if (ISWORD("no_deprecation_warnings")) { lex->pragmas |= ID_NO_DEPRECATION_WARNINGS; } else if (ISWORD("deprecation_warnings")) { lex->pragmas &= ~ID_NO_DEPRECATION_WARNINGS; } else if (ISWORD("disassemble")) { lex->pragmas |= ID_DISASSEMBLE; } else if (ISWORD("no_disassemble")) { lex->pragmas &= ~ID_DISASSEMBLE; } else { if( Pike_compiler->compiler_pass == 1 ) yywarning("Unknown #pragma directive."); } break; } if(ISWORD("pike")) { int minor; int major; SKIPSPACE(); READBUF(C!='.' && C!='\n'); major=lex_atoi(buf); if(!GOBBLE('.')) { yyerror("Missing '.' in #pike directive."); minor=0; }else{ READBUF(C!='\n' && C!='.'); minor=lex_atoi(buf); if(GOBBLE('.')) yyerror("Build numbers not supported in #pike directive."); READBUF(C!='\n'); change_compiler_compatibility(major, minor); } break; } /* FALL_THROUGH */ default: unknown_directive: if (len < 256) { #if (SHIFT == 0) struct pike_string *dir = make_shared_binary_string(buf, len); #elif (SHIFT == 1) struct pike_string *dir = make_shared_binary_string1((p_wchar1 *)buf, len); #elif (SHIFT == 2) struct pike_string *dir = make_shared_binary_string2((p_wchar2 *)buf, len); #endif my_yyerror("Unknown preprocessor directive %S.", dir); free_string(dir); } else { yyerror("Unknown preprocessor directive."); } SKIPUPTO('\n'); continue; } continue; case ' ': case '\t': continue; case '\'': { unsigned int l = 0; struct svalue res = svalue_int_zero; MP_INT bigint; while(1) { INT32 tmp; switch( (tmp=GETC()) ) { case 0: lex->pos -= (1<<SHIFT); yyerror("Unexpected end of file\n"); goto return_char; case '\\': tmp = char_const(lex); /* 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( l == 0 ) yyerror("Zero-length character constant."); goto return_char; } } return_char: if( TYPEOF(res) == PIKE_T_OBJECT ) { push_bignum( &bigint ); mpz_clear(&bigint); reduce_stack_top_bignum(); res = *--Pike_sp; } debug_malloc_pass( yylval->n=mksvaluenode(&res) ); free_svalue( &res ); return TOK_NUMBER; } UNREACHABLE(); case '"': { struct pike_string *s=readstring(lex); yylval->n=mkstrnode(s); free_string(s); return TOK_STRING; } case ':': if(GOBBLE(':')) return TOK_COLON_COLON; return c; case '.': if(GOBBLE('.')) { if(GOBBLE('.')) return TOK_DOT_DOT_DOT; return TOK_DOT_DOT; } if (((c = INDEX_CHARP(lex->pos, 0, SHIFT)) <= '9') && (c >= '0')) { lex->pos -= (1<<SHIFT); goto read_float; } return '.'; case '0': { int base = 0; if(GOBBLE('b') || GOBBLE('B')) { base = 2; goto read_based_number; } else if(GOBBLE('x') || GOBBLE('X')) { struct svalue sval; base = 16; read_based_number: SET_SVAL(sval, PIKE_T_INT, NUMBER_NUMBER, integer, 0); safe_wide_string_to_svalue_inumber(&sval, lex->pos, &lex->pos, base, 0, SHIFT); dmalloc_touch_svalue(&sval); yylval->n = mksvaluenode(&sval); free_svalue(&sval); return TOK_NUMBER; } } /* FALL_THROUGH */ case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { char *p1, *p2; double f; long l; struct svalue sval; lex->pos -= (1<<SHIFT); if(INDEX_CHARP(lex->pos, 0, SHIFT)=='0') for(l=1;INDEX_CHARP(lex->pos, l, SHIFT)<='9' && INDEX_CHARP(lex->pos, l, SHIFT)>='0';l++) if(INDEX_CHARP(lex->pos, l, SHIFT)>='8') my_yyerror("Illegal octal digit '%c'.", INDEX_CHARP(lex->pos, l, SHIFT)); read_float: f=lex_strtod(lex->pos, &p1); SET_SVAL(sval, PIKE_T_INT, NUMBER_NUMBER, integer, 0); safe_wide_string_to_svalue_inumber(&sval, lex->pos, &p2, 0, 0, SHIFT); if(p1>p2) { /* Floating point or version. */ if ((TYPEOF(sval) == PIKE_T_INT) && (INDEX_CHARP(p2, 0, SHIFT) == '.')) { int major = sval.u.integer; char *p3 = p2; p2 += (1<<SHIFT); dmalloc_touch_svalue(&sval); sval.u.integer = 0; safe_wide_string_to_svalue_inumber(&sval, p2, &p3, 0, 0, SHIFT); dmalloc_touch_svalue(&sval); if ((TYPEOF(sval) == PIKE_T_INT) && (p3 > p2)) { for (l=0; isspace(INDEX_CHARP(p3, l, SHIFT)); l++) ; if ((INDEX_CHARP(p3, l, SHIFT) == ':') && (INDEX_CHARP(p3, l+1, SHIFT) == ':')) { /* Version prefix. */ lex->pos = p3; yylval->n = mkversionnode(major, sval.u.integer); return TOK_VERSION; } } } free_svalue(&sval); yylval->fnum=(FLOAT_TYPE)f; #if 0 fprintf(stderr, "LEX: \"%.8s\" => %f, %f\n", (char *)lex->pos, f, yylval->fnum); #endif /* 0 */ lex->pos=p1; if (lex_isidchar (LOOK())) { my_yyerror ("Invalid char '%c' in constant.", LOOK()); do SKIP(); while (lex_isidchar (LOOK())); } return TOK_FLOAT; }else{ dmalloc_touch_svalue(&sval); yylval->n = mksvaluenode(&sval); free_svalue(&sval); debug_malloc_touch(yylval->n); lex->pos=p2; if (lex_isidchar (LOOK())) { if( GOBBLE('b') ) if( GOBBLE( 'i' ) ) if( GOBBLE( 't' ) ) { GOBBLE('s'); return TOK_BITS; } my_yyerror ("Invalid char '%c' in constant.", LOOK()); do SKIP(); while (lex_isidchar (LOOK())); } return TOK_NUMBER; } } case '-': if(GOBBLE('=')) return TOK_SUB_EQ; if(GOBBLE('>')) return TOK_ARROW; if(GOBBLE('-')) return TOK_DEC; return '-'; case '+': if(GOBBLE('=')) return TOK_ADD_EQ; if(GOBBLE('+')) return TOK_INC; return '+'; case '&': if(GOBBLE('=')) return TOK_AND_EQ; if(GOBBLE('&')) return TOK_LAND; return '&'; case '|': if(GOBBLE('=')) return TOK_OR_EQ; if(GOBBLE('|')) return TOK_LOR; return '|'; case '^': if(GOBBLE('=')) return TOK_XOR_EQ; return '^'; case '*': if(GOBBLE('=')) return TOK_MULT_EQ; return '*'; case '%': if(GOBBLE('=')) return TOK_MOD_EQ; return '%'; case '/': if(GOBBLE('=')) return TOK_DIV_EQ; return '/'; case '=': if(GOBBLE('=')) return TOK_EQ; return '='; case '<': if(GOBBLE('<')) { if(GOBBLE('=')) return TOK_LSH_EQ; return TOK_LSH; } if(GOBBLE('=')) return TOK_LE; return '<'; case '>': if(GOBBLE(')')) return TOK_MULTISET_END; if(GOBBLE('=')) return TOK_GE; if(GOBBLE('>')) { if(GOBBLE('=')) return TOK_RSH_EQ; return TOK_RSH; } return '>'; case '!': if(GOBBLE('=')) return TOK_NE; return TOK_NOT; case '(': if(GOBBLE('<')) return TOK_MULTISET_START; return '('; case '?': if(GOBBLE(':')) return TOK_LOR; if(GOBBLE('-') ) /* safe index: ?-> or ?[] */ { if( GOBBLE( '>' ) ) /* ?-> */ return TOK_SAFE_INDEX; SKIPN(-1); /* Undo GOBBLE('-') above */ } /* Probably wanted: ?. for safe constant index ?[] for safe [] index They however conflict with valid ?: syntaxes. */ /* if( GOBBLE('.' ) ) */ /* return TOK_SAFE_INDEX; */ case ']': case ',': case '~': case '@': case ')': case '{': case ';': case '}': return c; case '[': if( GOBBLE('?' ) ) return TOK_SAFE_START_INDEX; return c; case '`': { char *tmp; int offset=2; if(GOBBLE('`')) { offset--; if(GOBBLE('`')) { offset--; } } switch(c = GETC()) { case '/': tmp="```/"; break; case '%': tmp="```%"; break; case '*': tmp="```*"; break; case '&': tmp="```&"; break; case '|': tmp="```|"; break; case '^': tmp="```^"; break; case '~': tmp="```~"; break; case '+': if(GOBBLE('=')) { tmp="```+="; break; } tmp="```+"; break; case '<': if(GOBBLE('<')) { tmp="```<<"; break; } if(GOBBLE('=')) { tmp="```<="; break; } tmp="```<"; break; case '>': if(GOBBLE('>')) { tmp="```>>"; break; } if(GOBBLE('=')) { tmp="```>="; break; } tmp="```>"; break; case '!': if(GOBBLE('=')) { tmp="```!="; break; } tmp="```!"; break; case '=': if(GOBBLE('=')) { tmp="```=="; break; } tmp="```="; break; case '(': tmp="```()"; if(GOBBLE(')')) { break; } yyerror("Illegal ` identifier. Expected `()."); break; case '-': if(GOBBLE('>')) { if ((offset == 2) && lex_isidchar(LOOK())) { /* Getter/setter (old-style) * * Either * `->symbol * Or * `->symbol= */ char *buf; size_t len; struct pike_string *s; READBUF(lex_isidchar(C)); if (GOBBLE('=')) len += 1; /* Adjust for the prefix (`->). */ len += 3; buf -= 3<<SHIFT; #if (SHIFT == 0) s = make_shared_binary_string(buf, len); #else /* SHIFT != 0 */ #if (SHIFT == 1) s = make_shared_binary_string1((p_wchar1 *)buf, len); #else /* SHIFT != 1 */ s = make_shared_binary_string2((p_wchar2 *)buf, len); #endif /* SHIFT == 1 */ #endif /* SHIFT == 0 */ yylval->n = mkstrnode(s); free_string(s); return TOK_IDENTIFIER; } tmp="```->"; if(GOBBLE('=')) tmp="```->="; }else{ tmp="```-"; } break; case '[': tmp="```[]"; if(GOBBLE(']')) { if(GOBBLE('=')) tmp="```[]="; break; } if (GOBBLE ('.') && GOBBLE ('.') && GOBBLE (']')) { tmp = "```[..]"; break; } yyerror("Illegal ` identifier. Expected `[], `[]= or `[..]."); break; default: if (offset==2 && lex_isidchar(c)) { /* Getter/setter (new-style) * * Either * `symbol * Or * `symbol= */ char *buf; size_t len; struct pike_string *s; READBUF(lex_isidchar(C)); if (GOBBLE('=')) len += 1; /* Adjust for the prefix (`c). */ len += 2; buf -= 2<<SHIFT; #if (SHIFT == 0) s = make_shared_binary_string(buf, len); #else /* SHIFT != 0 */ #if (SHIFT == 1) s = make_shared_binary_string1((p_wchar1 *)buf, len); #else /* SHIFT != 1 */ s = make_shared_binary_string2((p_wchar2 *)buf, len); #endif /* SHIFT == 1 */ #endif /* SHIFT == 0 */ yylval->n = mkstrnode(s); free_string(s); return TOK_IDENTIFIER; } yyerror("Illegal ` identifier."); lex->pos -= (1<<SHIFT); tmp="```"; break; } { struct pike_string *s=make_shared_string(tmp+offset); yylval->n=mkstrnode(s); free_string(s); return TOK_IDENTIFIER; } } default: { if (c > 31) { my_yyerror("Illegal character '%c' (0x%02x)", c, c); } else { my_yyerror("Illegal character 0x%02x", c); } return ' '; } } } } /* * Clear the defines for the next pass */ #undef WCHAR #undef LOOK #undef GETC #undef SKIP #undef SKIPN #undef GOBBLE #undef SKIPSPACE #undef SKIPWHITE #undef SKIPUPTO #undef READBUF #undef TWO_CHAR #undef ISWORD #undef low_isword #undef parse_esc_seq #undef char_const #undef readstring #undef yylex #undef low_yylex #undef lex_atoi #undef lex_strtol #undef lex_strtod #undef lex_isidchar

pike.git/ src/ lexer.h > 5f58bdeecb41320455102b95b9180cba3c5d04f5 [Annotate]