/* * Wine Message Compiler lexical scanner * * Copyright 2000 Bertho A. Stultiens (BS) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include #include #include #include #include #include "utils.h" #include "wmc.h" #include "lang.h" #include "mcy.tab.h" /* * Keywords are case insensitive. All normal input is treated as * being in codepage iso-8859-1 for ascii input files (unicode * page 0) and as equivalent unicode if unicode input is selected. * All normal input, which is not part of a message text, is * enforced to be unicode page 0. Otherwise an error will be * generated. The normal file data should only be ASCII because * that is the basic definition of the grammar. * * Byteorder or unicode input is determined automatically by * reading the first 8 bytes and checking them against unicode * page 0 byteorder (hibyte must be 0). * -- FIXME -- * Alternatively, the input is checked against a special byte * sequence to identify the file. * -- FIXME -- * * * Keywords: * Codepages * Facility * FacilityNames * LanguageNames * MessageId * MessageIdTypedef * Severity * SeverityNames * SymbolicName * * Default added identifiers for classes: * SeverityNames: * Success = 0x0 * Informational = 0x1 * Warning = 0x2 * Error = 0x3 * FacilityNames: * System = 0x0FF * Application = 0xFFF * * The 'Codepages' keyword is a wmc extension. */ static const WCHAR ustr_application[] = { 'A', 'p', 'p', 'l', 'i', 'c', 'a', 't', 'i', 'o', 'n', 0 }; static const WCHAR ustr_codepages[] = { 'C', 'o', 'd', 'e', 'p', 'a', 'g', 'e', 's', 0 }; static const WCHAR ustr_english[] = { 'E', 'n', 'g', 'l', 'i', 's', 'h', 0 }; static const WCHAR ustr_error[] = { 'E', 'r', 'r', 'o', 'r', 0 }; static const WCHAR ustr_facility[] = { 'F', 'a', 'c', 'i', 'l', 'i', 't', 'y', 0 }; static const WCHAR ustr_facilitynames[] = { 'F', 'a', 'c', 'i', 'l', 'i', 't', 'y', 'N', 'a', 'm', 'e', 's', 0 }; static const WCHAR ustr_informational[] = { 'I', 'n', 'f', 'o', 'r', 'm', 'a', 't', 'i', 'o', 'n', 'a', 'l', 0 }; static const WCHAR ustr_language[] = { 'L', 'a', 'n', 'g', 'u', 'a', 'g', 'e', 0}; static const WCHAR ustr_languagenames[] = { 'L', 'a', 'n', 'g', 'u', 'a', 'g', 'e', 'N', 'a', 'm', 'e', 's', 0}; static const WCHAR ustr_messageid[] = { 'M', 'e', 's', 's', 'a', 'g', 'e', 'I', 'd', 0 }; static const WCHAR ustr_messageidtypedef[] = { 'M', 'e', 's', 's', 'a', 'g', 'e', 'I', 'd', 'T', 'y', 'p', 'e', 'd', 'e', 'f', 0 }; static const WCHAR ustr_outputbase[] = { 'O', 'u', 't', 'p', 'u', 't', 'B', 'a', 's', 'e', 0 }; static const WCHAR ustr_severity[] = { 'S', 'e', 'v', 'e', 'r', 'i', 't', 'y', 0 }; static const WCHAR ustr_severitynames[] = { 'S', 'e', 'v', 'e', 'r', 'i', 't', 'y', 'N', 'a', 'm', 'e', 's', 0 }; static const WCHAR ustr_success[] = { 'S', 'u', 'c', 'c', 'e', 's', 's', 0 }; static const WCHAR ustr_symbolicname[] = { 'S', 'y', 'm', 'b', 'o', 'l', 'i', 'c', 'N', 'a', 'm', 'e', 0 }; static const WCHAR ustr_system[] = { 'S', 'y', 's', 't', 'e', 'm', 0 }; static const WCHAR ustr_warning[] = { 'W', 'a', 'r', 'n', 'i', 'n', 'g', 0 }; static const WCHAR ustr_msg00001[] = { 'm', 's', 'g', '0', '0', '0', '0', '1', 0 }; /* * This table is to beat any form of "expression building" to check for * correct filename characters. It is also used for ident checks. * FIXME: use it more consistently. */ #define CH_SHORTNAME 0x01 #define CH_LONGNAME 0x02 #define CH_IDENT 0x04 #define CH_NUMBER 0x08 /*#define CH_WILDCARD 0x10*/ /*#define CH_DOT 0x20*/ #define CH_PUNCT 0x40 #define CH_INVALID 0x80 static const char char_table[256] = { 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, /* 0x00 - 0x07 */ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, /* 0x08 - 0x0F */ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, /* 0x10 - 0x17 */ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, /* 0x18 - 0x1F */ 0x80, 0x03, 0x80, 0x03, 0x03, 0x03, 0x03, 0x03, /* 0x20 - 0x27 " !"#$%&'" */ 0x43, 0x43, 0x10, 0x80, 0x03, 0x03, 0x22, 0x80, /* 0x28 - 0x2F "()*+,-./" */ 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, /* 0x30 - 0x37 "01234567" */ 0x0b, 0x0b, 0xc0, 0x80, 0x80, 0x80, 0x80, 0x10, /* 0x38 - 0x3F "89:;<=>?" */ 0x03, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x40 - 0x47 "@ABCDEFG" */ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x48 - 0x4F "HIJKLMNO" */ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x50 - 0x57 "PQRSTUVW" */ 0x07, 0x07, 0x07, 0x80, 0x80, 0x80, 0x80, 0x07, /* 0x58 - 0x5F "XYZ[\]^_" */ 0x03, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x60 - 0x67 "`abcdefg" */ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x68 - 0x6F "hijklmno" */ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, /* 0x70 - 0x77 "pqrstuvw" */ 0x07, 0x07, 0x07, 0x03, 0x80, 0x03, 0x03, 0x80, /* 0x78 - 0x7F "xyz{|}~ " */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0x80 - 0x87 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0x88 - 0x8F */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0x90 - 0x97 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0x98 - 0x9F */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xA0 - 0xA7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xA8 - 0xAF */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xB0 - 0xB7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xB8 - 0xBF */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xC0 - 0xC7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xC8 - 0xCF */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xD0 - 0xD7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xD8 - 0xDF */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xE0 - 0xE7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xE8 - 0xEF */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 0xF0 - 0xF7 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x80, /* 0xF8 - 0xFF */ }; static int isisochar(int ch) { return !(ch & (~0xff)); } static int codepage; void set_codepage(int cp) { codepage = cp; if (!is_valid_codepage( cp )) xyyerror("Codepage %d not found; cannot process\n", codepage); } /* * Input functions */ static int nungetstack = 0; static int allocungetstack = 0; static char *ungetstack = NULL; static int ninputbuffer = 0; static WCHAR *inputbuffer = NULL; static char *xlatebuffer = NULL; #define INPUTBUFFER_SIZE 2048 /* Must be larger than 4 and approx. large enough to hold a line */ /* * Fill the input buffer with *one* line of input. * The line is '\n' terminated so that scanning * messages with translation works as expected * (otherwise we cannot pre-translate because the * language is first known one line before the * actual message). */ static int fill_inputbuffer(void) { int n; static const char err_fatalread[] = "Fatal: reading input failed"; static int endian = -1; if(!inputbuffer) { inputbuffer = xmalloc(INPUTBUFFER_SIZE*sizeof(WCHAR)); xlatebuffer = xmalloc(INPUTBUFFER_SIZE); } try_again: if(!unicodein) { char *cptr; cptr = fgets(xlatebuffer, INPUTBUFFER_SIZE, yyin); if(!cptr && ferror(yyin)) xyyerror(err_fatalread); else if(!cptr) return 0; if (codepage == CP_UTF8) { WCHAR *buf = utf8_to_unicode( xlatebuffer, strlen(xlatebuffer), &n ); memcpy( inputbuffer, buf, (n + 1) * sizeof(WCHAR) ); free( buf ); } else { n = wmc_mbstowcs(codepage, 0, xlatebuffer, strlen(xlatebuffer)+1, inputbuffer, INPUTBUFFER_SIZE); if(n < 0) internal_error(__FILE__, __LINE__, "Could not translate to unicode (%d)\n", n); } if(n <= 1) goto try_again; /* Should not happen */ n--; /* Strip added conversion '\0' from input length */ /* * FIXME: * Detect UTF-8 in the first time we read some bytes by * checking the special sequence "FE..." or something like * that. I need to check www.unicode.org for details. */ } else { if(endian == -1) { n = fread(inputbuffer, 1, 8, yyin); if(n != 8) { if(!n && ferror(yyin)) xyyerror(err_fatalread); else xyyerror("Fatal: file too short to determine byteorder (should never happen)\n"); } if(isisochar(inputbuffer[0]) && isisochar(inputbuffer[1]) && isisochar(inputbuffer[2]) && isisochar(inputbuffer[3])) { #ifdef WORDS_BIGENDIAN endian = WMC_BO_BIG; #else endian = WMC_BO_LITTLE; #endif } else if(isisochar(BYTESWAP_WORD(inputbuffer[0])) && isisochar(BYTESWAP_WORD(inputbuffer[1])) && isisochar(BYTESWAP_WORD(inputbuffer[2])) && isisochar(BYTESWAP_WORD(inputbuffer[3]))) { #ifdef WORDS_BIGENDIAN endian = WMC_BO_LITTLE; #else endian = WMC_BO_BIG; #endif } else xyyerror("Fatal: cannot determine file's byteorder\n"); /* FIXME: * Determine the file-endian with the leader-bytes * "FF FE..."; can't remember the exact sequence. */ n /= 2; #ifdef WORDS_BIGENDIAN if(endian == WMC_BO_LITTLE) #else if(endian == WMC_BO_BIG) #endif { inputbuffer[0] = BYTESWAP_WORD(inputbuffer[0]); inputbuffer[1] = BYTESWAP_WORD(inputbuffer[1]); inputbuffer[2] = BYTESWAP_WORD(inputbuffer[2]); inputbuffer[3] = BYTESWAP_WORD(inputbuffer[3]); } } else { int i; n = 0; for(i = 0; i < INPUTBUFFER_SIZE; i++) { int t; t = fread(&inputbuffer[i], 2, 1, yyin); if(!t && ferror(yyin)) xyyerror(err_fatalread); else if(!t && n) break; n++; #ifdef WORDS_BIGENDIAN if(endian == WMC_BO_LITTLE) #else if(endian == WMC_BO_BIG) #endif { if((inputbuffer[i] = BYTESWAP_WORD(inputbuffer[i])) == '\n') break; } else { if(inputbuffer[i] == '\n') break; } } } } if(!n) { mcy_warning("Re-read line (input was or converted to zilch)\n"); goto try_again; /* Should not happen, but could be due to stdin reading and a signal */ } ninputbuffer += n; return 1; } static int get_unichar(void) { static WCHAR *b = NULL; char_number++; if(nungetstack) return ungetstack[--nungetstack]; if(!ninputbuffer) { if(!fill_inputbuffer()) return EOF; b = inputbuffer; } ninputbuffer--; return (int)(*b++ & 0xffff); } static void unget_unichar(int ch) { if(ch == EOF) return; char_number--; if(nungetstack == allocungetstack) { allocungetstack += 32; ungetstack = xrealloc(ungetstack, allocungetstack * sizeof(*ungetstack)); } ungetstack[nungetstack++] = (WCHAR)ch; } /* * Normal character stack. * Used for number scanning. */ static int ncharstack = 0; static int alloccharstack = 0; static char *charstack = NULL; static void empty_char_stack(void) { ncharstack = 0; } static void push_char(int ch) { if(ncharstack == alloccharstack) { alloccharstack += 32; charstack = xrealloc(charstack, alloccharstack * sizeof(*charstack)); } charstack[ncharstack++] = (char)ch; } static int tos_char_stack(void) { if(!ncharstack) return 0; else return (int)(charstack[ncharstack-1] & 0xff); } static char *get_char_stack(void) { return charstack; } /* * Unicode character stack. * Used for general scanner. */ static int nunicharstack = 0; static int allocunicharstack = 0; static WCHAR *unicharstack = NULL; static void empty_unichar_stack(void) { nunicharstack = 0; } static void push_unichar(int ch) { if(nunicharstack == allocunicharstack) { allocunicharstack += 128; unicharstack = xrealloc(unicharstack, allocunicharstack * sizeof(*unicharstack)); } unicharstack[nunicharstack++] = (WCHAR)ch; } #if 0 static int tos_unichar_stack(void) { if(!nunicharstack) return 0; else return (int)(unicharstack[nunicharstack-1] & 0xffff); } #endif static WCHAR *get_unichar_stack(void) { return unicharstack; } /* * Number scanner * * state | ch | next state * ------+-----------------+-------------------------- * 0 | [0] | 1 * 0 | [1-9] | 4 * 0 | . | error (should never occur) * 1 | [xX] | 2 * 1 | [0-7] | 3 * 1 | [89a-wyzA-WYZ_] | error invalid digit * 1 | . | return 0 * 2 | [0-9a-fA-F] | 2 * 2 | [g-zG-Z_] | error invalid hex digit * 2 | . | return (hex-number) if TOS != [xX] else error * 3 | [0-7] | 3 * 3 | [89a-zA-Z_] | error invalid octal digit * 3 | . | return (octal-number) * 4 | [0-9] | 4 * 4 | [a-zA-Z_] | error invalid decimal digit * 4 | . | return (decimal-number) * * All non-identifier characters [^a-zA-Z_0-9] terminate the scan * and return the value. This is not entirely correct, but close * enough (should check punctuators as trailing context, but the * char_table is not adapted to that and it is questionable whether * it is worth the trouble). * All non-iso-8859-1 characters are an error. */ static int scan_number(int ch) { int state = 0; int base = 10; empty_char_stack(); while(1) { if(!isisochar(ch)) xyyerror("Invalid digit\n"); switch(state) { case 0: if(isdigit(ch)) { push_char(ch); if(ch == '0') state = 1; else state = 4; } else internal_error(__FILE__, __LINE__, "Non-digit in first number-scanner state\n"); break; case 1: if(ch == 'x' || ch == 'X') { push_char(ch); state = 2; } else if(ch >= '0' && ch <= '7') { push_char(ch); state = 3; } else if(isalpha(ch) || ch == '_') xyyerror("Invalid number digit\n"); else { unget_unichar(ch); mcy_lval.num = 0; return tNUMBER; } break; case 2: if(isxdigit(ch)) push_char(ch); else if(isalpha(ch) || ch == '_' || !isxdigit(tos_char_stack())) xyyerror("Invalid hex digit\n"); else { base = 16; goto finish; } break; case 3: if(ch >= '0' && ch <= '7') push_char(ch); else if(isalnum(ch) || ch == '_') xyyerror("Invalid octal digit\n"); else { base = 8; goto finish; } break; case 4: if(isdigit(ch)) push_char(ch); else if(isalnum(ch) || ch == '_') xyyerror("Invalid decimal digit\n"); else { base = 10; goto finish; } break; default: internal_error(__FILE__, __LINE__, "Invalid state in number-scanner\n"); } ch = get_unichar(); } finish: unget_unichar(ch); push_char(0); mcy_lval.num = strtoul(get_char_stack(), NULL, base); return tNUMBER; } static void newline(void) { line_number++; char_number = 1; } static int unisort(const void *p1, const void *p2) { return unistricmp(((const token_t *)p1)->name, ((const token_t *)p2)->name); } static token_t *tokentable = NULL; static int ntokentable = 0; token_t *lookup_token(const WCHAR *s) { token_t tok; tok.name = s; return (token_t *)bsearch(&tok, tokentable, ntokentable, sizeof(*tokentable), unisort); } void add_token(tok_e type, const WCHAR *name, int tok, int cp, const WCHAR *alias, int fix) { ntokentable++; tokentable = xrealloc(tokentable, ntokentable * sizeof(*tokentable)); tokentable[ntokentable-1].type = type; tokentable[ntokentable-1].name = name; tokentable[ntokentable-1].token = tok; tokentable[ntokentable-1].codepage = cp; tokentable[ntokentable-1].alias = alias; tokentable[ntokentable-1].fixed = fix; qsort(tokentable, ntokentable, sizeof(*tokentable), unisort); } void get_tokentable(token_t **tab, int *len) { assert(tab != NULL); assert(len != NULL); *tab = tokentable; *len = ntokentable; } /* * The scanner * */ int mcy_lex(void) { static const WCHAR ustr_dot1[] = { '.', '\n', 0 }; static const WCHAR ustr_dot2[] = { '.', '\r', '\n', 0 }; static int isinit = 0; int ch; if(!isinit) { isinit++; set_codepage(WMC_DEFAULT_CODEPAGE); add_token(tok_keyword, ustr_codepages, tCODEPAGE, 0, NULL, 0); add_token(tok_keyword, ustr_facility, tFACILITY, 0, NULL, 1); add_token(tok_keyword, ustr_facilitynames, tFACNAMES, 0, NULL, 1); add_token(tok_keyword, ustr_language, tLANGUAGE, 0, NULL, 1); add_token(tok_keyword, ustr_languagenames, tLANNAMES, 0, NULL, 1); add_token(tok_keyword, ustr_messageid, tMSGID, 0, NULL, 1); add_token(tok_keyword, ustr_messageidtypedef, tTYPEDEF, 0, NULL, 1); add_token(tok_keyword, ustr_outputbase, tBASE, 0, NULL, 1); add_token(tok_keyword, ustr_severity, tSEVERITY, 0, NULL, 1); add_token(tok_keyword, ustr_severitynames, tSEVNAMES, 0, NULL, 1); add_token(tok_keyword, ustr_symbolicname, tSYMNAME, 0, NULL, 1); add_token(tok_severity, ustr_error, 0x03, 0, NULL, 0); add_token(tok_severity, ustr_warning, 0x02, 0, NULL, 0); add_token(tok_severity, ustr_informational, 0x01, 0, NULL, 0); add_token(tok_severity, ustr_success, 0x00, 0, NULL, 0); add_token(tok_facility, ustr_application, 0xFFF, 0, NULL, 0); add_token(tok_facility, ustr_system, 0x0FF, 0, NULL, 0); add_token(tok_language, ustr_english, 0x409, 437, ustr_msg00001, 0); } empty_unichar_stack(); while(1) { if(want_line) { while((ch = get_unichar()) != '\n') { if(ch == EOF) xyyerror("Unexpected EOF\n"); push_unichar(ch); } newline(); push_unichar(ch); push_unichar(0); if(!unistrcmp(ustr_dot1, get_unichar_stack()) || !unistrcmp(ustr_dot2, get_unichar_stack())) { want_line = 0; /* Reset the codepage to our default after each message */ set_codepage(WMC_DEFAULT_CODEPAGE); return tMSGEND; } mcy_lval.str = xunistrdup(get_unichar_stack()); return tLINE; } ch = get_unichar(); if(ch == EOF) return EOF; if(ch == '\n') { newline(); if(want_nl) { want_nl = 0; return tNL; } continue; } if(isisochar(ch)) { if(want_file) { int n = 0; while(n < 8 && isisochar(ch)) { int t = char_table[ch]; if((t & CH_PUNCT) || !(t & CH_SHORTNAME)) break; push_unichar(ch); n++; ch = get_unichar(); } unget_unichar(ch); push_unichar(0); want_file = 0; mcy_lval.str = xunistrdup(get_unichar_stack()); return tFILE; } if(char_table[ch] & CH_IDENT) { token_t *tok; while(isisochar(ch) && (char_table[ch] & (CH_IDENT|CH_NUMBER))) { push_unichar(ch); ch = get_unichar(); } unget_unichar(ch); push_unichar(0); if(!(tok = lookup_token(get_unichar_stack()))) { mcy_lval.str = xunistrdup(get_unichar_stack()); return tIDENT; } switch(tok->type) { case tok_keyword: return tok->token; case tok_language: codepage = tok->codepage; /* Fall through */ case tok_severity: case tok_facility: mcy_lval.tok = tok; return tTOKEN; default: internal_error(__FILE__, __LINE__, "Invalid token type encountered\n"); } } if(isspace(ch)) /* Ignore space */ continue; if(isdigit(ch)) return scan_number(ch); } switch(ch) { case ':': case '=': case '+': case '(': case ')': return ch; case ';': while(ch != '\n' && ch != EOF) { push_unichar(ch); ch = get_unichar(); } newline(); push_unichar(ch); /* Include the newline */ push_unichar(0); mcy_lval.str = xunistrdup(get_unichar_stack()); return tCOMMENT; default: xyyerror("Invalid character '%c' (0x%04x)\n", isisochar(ch) && isprint(ch) ? ch : '.', ch); } } }