/* * Copyright (C) 2012, 2013 * Wolfgang Bumiller * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include "gmqcc.h" #include "lexer.h" /* * List of Keywords */ /* original */ static const char *keywords_qc[] = { "for", "do", "while", "if", "else", "local", "return", "const" }; /* For fte/gmgqcc */ static const char *keywords_fg[] = { "switch", "case", "default", "struct", "union", "break", "continue", "typedef", "goto", "__builtin_debug_printtype" }; /* * Lexer code */ static char* *lex_filenames; static void lexerror(lex_file *lex, const char *fmt, ...) { va_list ap; va_start(ap, fmt); if (lex) con_vprintmsg(LVL_ERROR, lex->name, lex->sline, lex->column, "parse error", fmt, ap); else con_vprintmsg(LVL_ERROR, "", 0, 0, "parse error", fmt, ap); va_end(ap); } static bool lexwarn(lex_file *lex, int warntype, const char *fmt, ...) { bool r; lex_ctx_t ctx; va_list ap; ctx.file = lex->name; ctx.line = lex->sline; ctx.column = lex->column; va_start(ap, fmt); r = vcompile_warning(ctx, warntype, fmt, ap); va_end(ap); return r; } static void lex_token_new(lex_file *lex) { if (lex->tok.value) vec_shrinkto(lex->tok.value, 0); lex->tok.constval.t = 0; lex->tok.ctx.line = lex->sline; lex->tok.ctx.file = lex->name; lex->tok.ctx.column = lex->column; } static void lex_ungetch(lex_file *lex, int ch); static int lex_getch(lex_file *lex); lex_file* lex_open(const char *file) { lex_file *lex; fs_file_t *in = fs_file_open(file, "rb"); uint32_t read; if (!in) { lexerror(NULL, "open failed: '%s'\n", file); return NULL; } lex = (lex_file*)mem_a(sizeof(*lex)); if (!lex) { fs_file_close(in); lexerror(NULL, "out of memory\n"); return NULL; } memset(lex, 0, sizeof(*lex)); lex->file = in; lex->name = util_strdup(file); lex->line = 1; /* we start counting at 1 */ lex->column = 0; lex->peekpos = 0; lex->eof = false; /* handle BOM */ if ((read = (lex_getch(lex) << 16) | (lex_getch(lex) << 8) | lex_getch(lex)) != 0xEFBBBF) { lex_ungetch(lex, (read & 0x0000FF)); lex_ungetch(lex, (read & 0x00FF00) >> 8); lex_ungetch(lex, (read & 0xFF0000) >> 16); } else { /* * otherwise the lexer has advanced 3 bytes for the BOM, we need * to set the column back to 0 */ lex->column = 0; } vec_push(lex_filenames, lex->name); return lex; } lex_file* lex_open_string(const char *str, size_t len, const char *name) { lex_file *lex; lex = (lex_file*)mem_a(sizeof(*lex)); if (!lex) { lexerror(NULL, "out of memory\n"); return NULL; } memset(lex, 0, sizeof(*lex)); lex->file = NULL; lex->open_string = str; lex->open_string_length = len; lex->open_string_pos = 0; lex->name = util_strdup(name ? name : ""); lex->line = 1; /* we start counting at 1 */ lex->peekpos = 0; lex->eof = false; lex->column = 0; vec_push(lex_filenames, lex->name); return lex; } void lex_cleanup(void) { size_t i; for (i = 0; i < vec_size(lex_filenames); ++i) mem_d(lex_filenames[i]); vec_free(lex_filenames); } void lex_close(lex_file *lex) { size_t i; for (i = 0; i < vec_size(lex->frames); ++i) mem_d(lex->frames[i].name); vec_free(lex->frames); if (lex->modelname) vec_free(lex->modelname); if (lex->file) fs_file_close(lex->file); vec_free(lex->tok.value); /* mem_d(lex->name); collected in lex_filenames */ mem_d(lex); } static int lex_fgetc(lex_file *lex) { if (lex->file) { lex->column++; return fs_file_getc(lex->file); } if (lex->open_string) { if (lex->open_string_pos >= lex->open_string_length) return FS_FILE_EOF; lex->column++; return lex->open_string[lex->open_string_pos++]; } return FS_FILE_EOF; } /* Get or put-back data * The following to functions do NOT understand what kind of data they * are working on. * The are merely wrapping get/put in order to count line numbers. */ static int lex_try_trigraph(lex_file *lex, int old) { int c2, c3; c2 = lex_fgetc(lex); if (!lex->push_line && c2 == '\n') { lex->line++; lex->column = 0; } if (c2 != '?') { lex_ungetch(lex, c2); return old; } c3 = lex_fgetc(lex); if (!lex->push_line && c3 == '\n') { lex->line++; lex->column = 0; } switch (c3) { case '=': return '#'; case '/': return '\\'; case '\'': return '^'; case '(': return '['; case ')': return ']'; case '!': return '|'; case '<': return '{'; case '>': return '}'; case '-': return '~'; default: lex_ungetch(lex, c3); lex_ungetch(lex, c2); return old; } } static int lex_try_digraph(lex_file *lex, int ch) { int c2; c2 = lex_fgetc(lex); /* we just used fgetc() so count lines * need to offset a \n the ungetch would recognize */ if (!lex->push_line && c2 == '\n') lex->line++; if (ch == '<' && c2 == ':') return '['; else if (ch == ':' && c2 == '>') return ']'; else if (ch == '<' && c2 == '%') return '{'; else if (ch == '%' && c2 == '>') return '}'; else if (ch == '%' && c2 == ':') return '#'; lex_ungetch(lex, c2); return ch; } static int lex_getch(lex_file *lex) { int ch; if (lex->peekpos) { lex->peekpos--; if (!lex->push_line && lex->peek[lex->peekpos] == '\n') { lex->line++; lex->column = 0; } return lex->peek[lex->peekpos]; } ch = lex_fgetc(lex); if (!lex->push_line && ch == '\n') { lex->line++; lex->column = 0; } else if (ch == '?') return lex_try_trigraph(lex, ch); else if (!lex->flags.nodigraphs && (ch == '<' || ch == ':' || ch == '%')) return lex_try_digraph(lex, ch); return ch; } static void lex_ungetch(lex_file *lex, int ch) { lex->peek[lex->peekpos++] = ch; lex->column--; if (!lex->push_line && ch == '\n') { lex->line--; lex->column = 0; } } /* classify characters * some additions to the is*() functions of ctype.h */ /* Idents are alphanumberic, but they start with alpha or _ */ static bool isident_start(int ch) { return util_isalpha(ch) || ch == '_'; } static bool isident(int ch) { return isident_start(ch) || util_isdigit(ch); } /* isxdigit_only is used when we already know it's not a digit * and want to see if it's a hex digit anyway. */ static bool isxdigit_only(int ch) { return (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F'); } /* Append a character to the token buffer */ static void lex_tokench(lex_file *lex, int ch) { vec_push(lex->tok.value, ch); } /* Append a trailing null-byte */ static void lex_endtoken(lex_file *lex) { vec_push(lex->tok.value, 0); vec_shrinkby(lex->tok.value, 1); } static bool lex_try_pragma(lex_file *lex) { int ch; char *pragma = NULL; char *command = NULL; char *param = NULL; size_t line; if (lex->flags.preprocessing) return false; line = lex->line; ch = lex_getch(lex); if (ch != '#') { lex_ungetch(lex, ch); return false; } for (ch = lex_getch(lex); vec_size(pragma) < 8 && ch >= 'a' && ch <= 'z'; ch = lex_getch(lex)) vec_push(pragma, ch); vec_push(pragma, 0); if (ch != ' ' || strcmp(pragma, "pragma")) { lex_ungetch(lex, ch); goto unroll; } for (ch = lex_getch(lex); vec_size(command) < 32 && ch >= 'a' && ch <= 'z'; ch = lex_getch(lex)) vec_push(command, ch); vec_push(command, 0); if (ch != '(') { lex_ungetch(lex, ch); goto unroll; } for (ch = lex_getch(lex); vec_size(param) < 1024 && ch != ')' && ch != '\n'; ch = lex_getch(lex)) vec_push(param, ch); vec_push(param, 0); if (ch != ')') { lex_ungetch(lex, ch); goto unroll; } if (!strcmp(command, "push")) { if (!strcmp(param, "line")) { lex->push_line++; if (lex->push_line == 1) --line; } else goto unroll; } else if (!strcmp(command, "pop")) { if (!strcmp(param, "line")) { if (lex->push_line) lex->push_line--; if (lex->push_line == 0) --line; } else goto unroll; } else if (!strcmp(command, "file")) { lex->name = util_strdup(param); vec_push(lex_filenames, lex->name); } else if (!strcmp(command, "line")) { line = strtol(param, NULL, 0)-1; } else goto unroll; lex->line = line; while (ch != '\n' && ch != FS_FILE_EOF) ch = lex_getch(lex); vec_free(command); vec_free(param); vec_free(pragma); return true; unroll: if (command) { vec_pop(command); while (vec_size(command)) { lex_ungetch(lex, (unsigned char)vec_last(command)); vec_pop(command); } vec_free(command); lex_ungetch(lex, ' '); } if (param) { vec_pop(param); while (vec_size(param)) { lex_ungetch(lex, (unsigned char)vec_last(param)); vec_pop(param); } vec_free(param); lex_ungetch(lex, ' '); } if (pragma) { vec_pop(pragma); while (vec_size(pragma)) { lex_ungetch(lex, (unsigned char)vec_last(pragma)); vec_pop(pragma); } vec_free(pragma); } lex_ungetch(lex, '#'); lex->line = line; return false; } /* Skip whitespace and comments and return the first * non-white character. * As this makes use of the above getch() ungetch() functions, * we don't need to care at all about line numbering anymore. * * In theory, this function should only be used at the beginning * of lexing, or when we *know* the next character is part of the token. * Otherwise, if the parser throws an error, the linenumber may not be * the line of the error, but the line of the next token AFTER the error. * * This is currently only problematic when using c-like string-continuation, * since comments and whitespaces are allowed between 2 such strings. * Example: printf( "line one\n" // A comment "A continuation of the previous string" // This line is skipped , foo); * In this case, if the parse decides it didn't actually want a string, * and uses lex->line to print an error, it will show the ', foo);' line's * linenumber. * * On the other hand, the parser is supposed to remember the line of the next * token's beginning. In this case we would want skipwhite() to be called * AFTER reading a token, so that the parser, before reading the NEXT token, * doesn't store teh *comment's* linenumber, but the actual token's linenumber. * * THIS SOLUTION * here is to store the line of the first character after skipping * the initial whitespace in lex->sline, this happens in lex_do. */ static int lex_skipwhite(lex_file *lex, bool hadwhite) { int ch = 0; bool haswhite = hadwhite; do { ch = lex_getch(lex); while (ch != FS_FILE_EOF && util_isspace(ch)) { if (ch == '\n') { if (lex_try_pragma(lex)) continue; } if (lex->flags.preprocessing) { if (ch == '\n') { /* end-of-line */ /* see if there was whitespace first */ if (haswhite) { /* (vec_size(lex->tok.value)) { */ lex_ungetch(lex, ch); lex_endtoken(lex); return TOKEN_WHITE; } /* otherwise return EOL */ return TOKEN_EOL; } haswhite = true; lex_tokench(lex, ch); } ch = lex_getch(lex); } if (ch == '/') { ch = lex_getch(lex); if (ch == '/') { /* one line comment */ ch = lex_getch(lex); if (lex->flags.preprocessing) { haswhite = true; lex_tokench(lex, ' '); lex_tokench(lex, ' '); } while (ch != FS_FILE_EOF && ch != '\n') { if (lex->flags.preprocessing) lex_tokench(lex, ' '); /* ch); */ ch = lex_getch(lex); } if (lex->flags.preprocessing) { lex_ungetch(lex, '\n'); lex_endtoken(lex); return TOKEN_WHITE; } continue; } if (ch == '*') { /* multiline comment */ if (lex->flags.preprocessing) { haswhite = true; lex_tokench(lex, ' '); lex_tokench(lex, ' '); } while (ch != FS_FILE_EOF) { ch = lex_getch(lex); if (ch == '*') { ch = lex_getch(lex); if (ch == '/') { if (lex->flags.preprocessing) { lex_tokench(lex, ' '); lex_tokench(lex, ' '); } break; } lex_ungetch(lex, ch); } if (lex->flags.preprocessing) { if (ch == '\n') lex_tokench(lex, '\n'); else lex_tokench(lex, ' '); /* ch); */ } } ch = ' '; /* cause TRUE in the isspace check */ continue; } /* Otherwise roll back to the slash and break out of the loop */ lex_ungetch(lex, ch); ch = '/'; break; } } while (ch != FS_FILE_EOF && util_isspace(ch)); if (haswhite) { lex_endtoken(lex); lex_ungetch(lex, ch); return TOKEN_WHITE; } return ch; } /* Get a token */ static bool GMQCC_WARN lex_finish_ident(lex_file *lex) { int ch; ch = lex_getch(lex); while (ch != FS_FILE_EOF && isident(ch)) { lex_tokench(lex, ch); ch = lex_getch(lex); } /* last ch was not an ident ch: */ lex_ungetch(lex, ch); return true; } /* read one ident for the frame list */ static int lex_parse_frame(lex_file *lex) { int ch; lex_token_new(lex); ch = lex_getch(lex); while (ch != FS_FILE_EOF && ch != '\n' && util_isspace(ch)) ch = lex_getch(lex); if (ch == '\n') return 1; if (!isident_start(ch)) { lexerror(lex, "invalid framename, must start with one of a-z or _, got %c", ch); return -1; } lex_tokench(lex, ch); if (!lex_finish_ident(lex)) return -1; lex_endtoken(lex); return 0; } /* read a list of $frames */ static bool lex_finish_frames(lex_file *lex) { do { size_t i; int rc; frame_macro m; rc = lex_parse_frame(lex); if (rc > 0) /* end of line */ return true; if (rc < 0) /* error */ return false; for (i = 0; i < vec_size(lex->frames); ++i) { if (!strcmp(lex->tok.value, lex->frames[i].name)) { lex->frames[i].value = lex->framevalue++; if (lexwarn(lex, WARN_FRAME_MACROS, "duplicate frame macro defined: `%s`", lex->tok.value)) return false; break; } } if (i < vec_size(lex->frames)) continue; m.value = lex->framevalue++; m.name = util_strdup(lex->tok.value); vec_shrinkto(lex->tok.value, 0); vec_push(lex->frames, m); } while (true); return false; } static int GMQCC_WARN lex_finish_string(lex_file *lex, int quote) { utf8ch_t chr = 0; int ch = 0; int nextch; bool hex; bool oct; char u8buf[8]; /* way more than enough */ int u8len, uc; while (ch != FS_FILE_EOF) { ch = lex_getch(lex); if (ch == quote) return TOKEN_STRINGCONST; if (lex->flags.preprocessing && ch == '\\') { lex_tokench(lex, ch); ch = lex_getch(lex); if (ch == FS_FILE_EOF) { lexerror(lex, "unexpected end of file"); lex_ungetch(lex, FS_FILE_EOF); /* next token to be TOKEN_EOF */ return (lex->tok.ttype = TOKEN_ERROR); } lex_tokench(lex, ch); } else if (ch == '\\') { ch = lex_getch(lex); if (ch == FS_FILE_EOF) { lexerror(lex, "unexpected end of file"); lex_ungetch(lex, FS_FILE_EOF); /* next token to be TOKEN_EOF */ return (lex->tok.ttype = TOKEN_ERROR); } switch (ch) { case '\\': break; case '\'': break; case '"': break; case 'a': ch = '\a'; break; case 'b': ch = '\b'; break; case 'r': ch = '\r'; break; case 'n': ch = '\n'; break; case 't': ch = '\t'; break; case 'f': ch = '\f'; break; case 'v': ch = '\v'; break; case 'x': case 'X': /* same procedure as in fteqcc */ ch = 0; nextch = lex_getch(lex); if (nextch >= '0' && nextch <= '9') ch += nextch - '0'; else if (nextch >= 'a' && nextch <= 'f') ch += nextch - 'a' + 10; else if (nextch >= 'A' && nextch <= 'F') ch += nextch - 'A' + 10; else { lexerror(lex, "bad character code"); lex_ungetch(lex, nextch); return (lex->tok.ttype = TOKEN_ERROR); } ch *= 0x10; nextch = lex_getch(lex); if (nextch >= '0' && nextch <= '9') ch += nextch - '0'; else if (nextch >= 'a' && nextch <= 'f') ch += nextch - 'a' + 10; else if (nextch >= 'A' && nextch <= 'F') ch += nextch - 'A' + 10; else { lexerror(lex, "bad character code"); lex_ungetch(lex, nextch); return (lex->tok.ttype = TOKEN_ERROR); } break; /* fteqcc support */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': ch = 18 + ch - '0'; break; case '<': ch = 29; break; case '-': ch = 30; break; case '>': ch = 31; break; case '[': ch = 16; break; case ']': ch = 17; break; case '{': chr = 0; nextch = lex_getch(lex); hex = (nextch == 'x'); oct = (nextch == '0'); if (!hex && !oct) lex_ungetch(lex, nextch); for (nextch = lex_getch(lex); nextch != '}'; nextch = lex_getch(lex)) { if (!hex && !oct) { if (nextch >= '0' && nextch <= '9') chr = chr * 10 + nextch - '0'; else { lexerror(lex, "bad character code"); return (lex->tok.ttype = TOKEN_ERROR); } } else if (!oct) { if (nextch >= '0' && nextch <= '9') chr = chr * 0x10 + nextch - '0'; else if (nextch >= 'a' && nextch <= 'f') chr = chr * 0x10 + nextch - 'a' + 10; else if (nextch >= 'A' && nextch <= 'F') chr = chr * 0x10 + nextch - 'A' + 10; else { lexerror(lex, "bad character code"); return (lex->tok.ttype = TOKEN_ERROR); } } else { if (nextch >= '0' && nextch <= '9') chr = chr * 8 + chr - '0'; else { lexerror(lex, "bad character code"); return (lex->tok.ttype = TOKEN_ERROR); } } if (chr > 0x10FFFF || (!OPTS_FLAG(UTF8) && chr > 255)) { lexerror(lex, "character code out of range"); return (lex->tok.ttype = TOKEN_ERROR); } } if (OPTS_FLAG(UTF8) && chr >= 128) { u8len = utf8_from(u8buf, chr); if (!u8len) ch = 0; else { --u8len; lex->column += u8len; for (uc = 0; uc < u8len; ++uc) lex_tokench(lex, u8buf[uc]); /* * the last character will be inserted with the tokench() call * below the switch */ ch = u8buf[uc]; } } else ch = chr; break; case '\n': ch = '\n'; break; default: lexwarn(lex, WARN_UNKNOWN_CONTROL_SEQUENCE, "unrecognized control sequence: \\%c", ch); /* so we just add the character plus backslash no matter what it actually is */ lex_tokench(lex, '\\'); } /* add the character finally */ lex_tokench(lex, ch); } else lex_tokench(lex, ch); } lexerror(lex, "unexpected end of file within string constant"); lex_ungetch(lex, FS_FILE_EOF); /* next token to be TOKEN_EOF */ return (lex->tok.ttype = TOKEN_ERROR); } static int GMQCC_WARN lex_finish_digit(lex_file *lex, int lastch) { bool ishex = false; int ch = lastch; /* parse a number... */ if (ch == '.') lex->tok.ttype = TOKEN_FLOATCONST; else lex->tok.ttype = TOKEN_INTCONST; lex_tokench(lex, ch); ch = lex_getch(lex); if (ch != '.' && !util_isdigit(ch)) { if (lastch != '0' || ch != 'x') { /* end of the number or EOF */ lex_ungetch(lex, ch); lex_endtoken(lex); lex->tok.constval.i = lastch - '0'; return lex->tok.ttype; } ishex = true; } /* EOF would have been caught above */ if (ch != '.') { lex_tokench(lex, ch); ch = lex_getch(lex); while (util_isdigit(ch) || (ishex && isxdigit_only(ch))) { lex_tokench(lex, ch); ch = lex_getch(lex); } } /* NOT else, '.' can come from above as well */ if (lex->tok.ttype != TOKEN_FLOATCONST && ch == '.' && !ishex) { /* Allow floating comma in non-hex mode */ lex->tok.ttype = TOKEN_FLOATCONST; lex_tokench(lex, ch); /* continue digits-only */ ch = lex_getch(lex); while (util_isdigit(ch)) { lex_tokench(lex, ch); ch = lex_getch(lex); } } /* put back the last character */ /* but do not put back the trailing 'f' or a float */ if (lex->tok.ttype == TOKEN_FLOATCONST && ch == 'f') ch = lex_getch(lex); /* generally we don't want words to follow numbers: */ if (isident(ch)) { lexerror(lex, "unexpected trailing characters after number"); return (lex->tok.ttype = TOKEN_ERROR); } lex_ungetch(lex, ch); lex_endtoken(lex); if (lex->tok.ttype == TOKEN_FLOATCONST) lex->tok.constval.f = strtod(lex->tok.value, NULL); else lex->tok.constval.i = strtol(lex->tok.value, NULL, 0); return lex->tok.ttype; } int lex_do(lex_file *lex) { int ch, nextch, thirdch; bool hadwhite = false; lex_token_new(lex); while (true) { ch = lex_skipwhite(lex, hadwhite); hadwhite = true; if (!lex->flags.mergelines || ch != '\\') break; ch = lex_getch(lex); if (ch == '\r') ch = lex_getch(lex); if (ch != '\n') { lex_ungetch(lex, ch); ch = '\\'; break; } /* we reached a linemerge */ lex_tokench(lex, '\n'); continue; } if (lex->flags.preprocessing && (ch == TOKEN_WHITE || ch == TOKEN_EOL || ch == TOKEN_FATAL)) { return (lex->tok.ttype = ch); } lex->sline = lex->line; lex->tok.ctx.line = lex->sline; lex->tok.ctx.file = lex->name; if (lex->eof) return (lex->tok.ttype = TOKEN_FATAL); if (ch == FS_FILE_EOF) { lex->eof = true; return (lex->tok.ttype = TOKEN_EOF); } /* modelgen / spiritgen commands */ if (ch == '$' && !lex->flags.preprocessing) { const char *v; size_t frame; ch = lex_getch(lex); if (!isident_start(ch)) { lexerror(lex, "hanging '$' modelgen/spritegen command line"); return lex_do(lex); } lex_tokench(lex, ch); if (!lex_finish_ident(lex)) return (lex->tok.ttype = TOKEN_ERROR); lex_endtoken(lex); /* skip the known commands */ v = lex->tok.value; if (!strcmp(v, "frame") || !strcmp(v, "framesave")) { /* frame/framesave command works like an enum * similar to fteqcc we handle this in the lexer. * The reason for this is that it is sensitive to newlines, * which the parser is unaware of */ if (!lex_finish_frames(lex)) return (lex->tok.ttype = TOKEN_ERROR); return lex_do(lex); } if (!strcmp(v, "framevalue")) { ch = lex_getch(lex); while (ch != FS_FILE_EOF && util_isspace(ch) && ch != '\n') ch = lex_getch(lex); if (!util_isdigit(ch)) { lexerror(lex, "$framevalue requires an integer parameter"); return lex_do(lex); } lex_token_new(lex); lex->tok.ttype = lex_finish_digit(lex, ch); lex_endtoken(lex); if (lex->tok.ttype != TOKEN_INTCONST) { lexerror(lex, "$framevalue requires an integer parameter"); return lex_do(lex); } lex->framevalue = lex->tok.constval.i; return lex_do(lex); } if (!strcmp(v, "framerestore")) { int rc; lex_token_new(lex); rc = lex_parse_frame(lex); if (rc > 0) { lexerror(lex, "$framerestore requires a framename parameter"); return lex_do(lex); } if (rc < 0) return (lex->tok.ttype = TOKEN_FATAL); v = lex->tok.value; for (frame = 0; frame < vec_size(lex->frames); ++frame) { if (!strcmp(v, lex->frames[frame].name)) { lex->framevalue = lex->frames[frame].value; return lex_do(lex); } } lexerror(lex, "unknown framename `%s`", v); return lex_do(lex); } if (!strcmp(v, "modelname")) { int rc; lex_token_new(lex); rc = lex_parse_frame(lex); if (rc > 0) { lexerror(lex, "$modelname requires a parameter"); return lex_do(lex); } if (rc < 0) return (lex->tok.ttype = TOKEN_FATAL); if (lex->modelname) { frame_macro m; m.value = lex->framevalue; m.name = lex->modelname; lex->modelname = NULL; vec_push(lex->frames, m); } lex->modelname = lex->tok.value; lex->tok.value = NULL; return lex_do(lex); } if (!strcmp(v, "flush")) { size_t fi; for (fi = 0; fi < vec_size(lex->frames); ++fi) mem_d(lex->frames[fi].name); vec_free(lex->frames); /* skip line (fteqcc does it too) */ ch = lex_getch(lex); while (ch != FS_FILE_EOF && ch != '\n') ch = lex_getch(lex); return lex_do(lex); } if (!strcmp(v, "cd") || !strcmp(v, "origin") || !strcmp(v, "base") || !strcmp(v, "flags") || !strcmp(v, "scale") || !strcmp(v, "skin")) { /* skip line */ ch = lex_getch(lex); while (ch != FS_FILE_EOF && ch != '\n') ch = lex_getch(lex); return lex_do(lex); } for (frame = 0; frame < vec_size(lex->frames); ++frame) { if (!strcmp(v, lex->frames[frame].name)) { lex->tok.constval.i = lex->frames[frame].value; return (lex->tok.ttype = TOKEN_INTCONST); } } lexerror(lex, "invalid frame macro"); return lex_do(lex); } /* single-character tokens */ switch (ch) { case '[': nextch = lex_getch(lex); if (nextch == '[') { lex_tokench(lex, ch); lex_tokench(lex, nextch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_ATTRIBUTE_OPEN); } lex_ungetch(lex, nextch); /* FALL THROUGH */ case '(': case ':': case '?': lex_tokench(lex, ch); lex_endtoken(lex); if (lex->flags.noops) return (lex->tok.ttype = ch); else return (lex->tok.ttype = TOKEN_OPERATOR); case ']': if (lex->flags.noops) { nextch = lex_getch(lex); if (nextch == ']') { lex_tokench(lex, ch); lex_tokench(lex, nextch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_ATTRIBUTE_CLOSE); } lex_ungetch(lex, nextch); } /* FALL THROUGH */ case ')': case ';': case '{': case '}': case '#': lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = ch); default: break; } if (ch == '.') { nextch = lex_getch(lex); /* digits starting with a dot */ if (util_isdigit(nextch)) { lex_ungetch(lex, nextch); lex->tok.ttype = lex_finish_digit(lex, ch); lex_endtoken(lex); return lex->tok.ttype; } lex_ungetch(lex, nextch); } if (lex->flags.noops) { /* Detect characters early which are normally * operators OR PART of an operator. */ switch (ch) { case '*': case '/': case '<': case '>': case '=': case '&': case '|': case '^': case '~': case ',': case '!': lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = ch); default: break; } } if (ch == '.') { lex_tokench(lex, ch); /* peak ahead once */ nextch = lex_getch(lex); if (nextch != '.') { lex_ungetch(lex, nextch); lex_endtoken(lex); if (lex->flags.noops) return (lex->tok.ttype = ch); else return (lex->tok.ttype = TOKEN_OPERATOR); } /* peak ahead again */ nextch = lex_getch(lex); if (nextch != '.') { lex_ungetch(lex, nextch); lex_ungetch(lex, '.'); lex_endtoken(lex); if (lex->flags.noops) return (lex->tok.ttype = ch); else return (lex->tok.ttype = TOKEN_OPERATOR); } /* fill the token to be "..." */ lex_tokench(lex, ch); lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_DOTS); } if (ch == ',' || ch == '.') { lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_OPERATOR); } if (ch == '+' || ch == '-' || /* ++, --, +=, -= and -> as well! */ ch == '>' || ch == '<' || /* <<, >>, <=, >= and >< as well! */ ch == '=' || ch == '!' || /* <=>, ==, != */ ch == '&' || ch == '|' || /* &&, ||, &=, |= */ ch == '~' || ch == '^' /* ~=, ~, ^ */ ) { lex_tokench(lex, ch); nextch = lex_getch(lex); if ((nextch == '=' && ch != '<') || (nextch == ch && ch != '!') || (nextch == '<' && ch == '>')) { lex_tokench(lex, nextch); } else if (ch == '<' && nextch == '=') { lex_tokench(lex, nextch); if ((thirdch = lex_getch(lex)) == '>') lex_tokench(lex, thirdch); else lex_ungetch(lex, thirdch); } else if (ch == '-' && nextch == '>') { lex_tokench(lex, nextch); } else if (ch == '&' && nextch == '~') { thirdch = lex_getch(lex); if (thirdch != '=') { lex_ungetch(lex, thirdch); lex_ungetch(lex, nextch); } else { lex_tokench(lex, nextch); lex_tokench(lex, thirdch); } } else if (lex->flags.preprocessing && ch == '-' && util_isdigit(nextch)) { lex->tok.ttype = lex_finish_digit(lex, nextch); if (lex->tok.ttype == TOKEN_INTCONST) lex->tok.constval.i = -lex->tok.constval.i; else lex->tok.constval.f = -lex->tok.constval.f; lex_endtoken(lex); return lex->tok.ttype; } else { lex_ungetch(lex, nextch); } lex_endtoken(lex); return (lex->tok.ttype = TOKEN_OPERATOR); } if (ch == '*' || ch == '/') /* *=, /= */ { lex_tokench(lex, ch); nextch = lex_getch(lex); if (nextch == '=' || nextch == '*') { lex_tokench(lex, nextch); } else lex_ungetch(lex, nextch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_OPERATOR); } if (ch == '%') { lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = TOKEN_OPERATOR); } if (isident_start(ch)) { const char *v; lex_tokench(lex, ch); if (!lex_finish_ident(lex)) { /* error? */ return (lex->tok.ttype = TOKEN_ERROR); } lex_endtoken(lex); lex->tok.ttype = TOKEN_IDENT; v = lex->tok.value; if (!strcmp(v, "void")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_VOID; } else if (!strcmp(v, "int")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_INTEGER; } else if (!strcmp(v, "float")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_FLOAT; } else if (!strcmp(v, "string")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_STRING; } else if (!strcmp(v, "entity")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_ENTITY; } else if (!strcmp(v, "vector")) { lex->tok.ttype = TOKEN_TYPENAME; lex->tok.constval.t = TYPE_VECTOR; } else { size_t kw; for (kw = 0; kw < GMQCC_ARRAY_COUNT(keywords_qc); ++kw) { if (!strcmp(v, keywords_qc[kw])) return (lex->tok.ttype = TOKEN_KEYWORD); } if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_QCC) { for (kw = 0; kw < GMQCC_ARRAY_COUNT(keywords_fg); ++kw) { if (!strcmp(v, keywords_fg[kw])) return (lex->tok.ttype = TOKEN_KEYWORD); } } } return lex->tok.ttype; } if (ch == '"') { lex->flags.nodigraphs = true; if (lex->flags.preprocessing) lex_tokench(lex, ch); lex->tok.ttype = lex_finish_string(lex, '"'); if (lex->flags.preprocessing) lex_tokench(lex, ch); while (!lex->flags.preprocessing && lex->tok.ttype == TOKEN_STRINGCONST) { /* Allow c style "string" "continuation" */ ch = lex_skipwhite(lex, false); if (ch != '"') { lex_ungetch(lex, ch); break; } lex->tok.ttype = lex_finish_string(lex, '"'); } lex->flags.nodigraphs = false; lex_endtoken(lex); return lex->tok.ttype; } if (ch == '\'') { /* we parse character constants like string, * but return TOKEN_CHARCONST, or a vector type if it fits... * Likewise actual unescaping has to be done by the parser. * The difference is we don't allow 'char' 'continuation'. */ if (lex->flags.preprocessing) lex_tokench(lex, ch); lex->tok.ttype = lex_finish_string(lex, '\''); if (lex->flags.preprocessing) lex_tokench(lex, ch); lex_endtoken(lex); lex->tok.ttype = TOKEN_CHARCONST; /* It's a vector if we can successfully scan 3 floats */ if (util_sscanf(lex->tok.value, " %f %f %f ", &lex->tok.constval.v.x, &lex->tok.constval.v.y, &lex->tok.constval.v.z) == 3) { lex->tok.ttype = TOKEN_VECTORCONST; } else { if (!lex->flags.preprocessing && strlen(lex->tok.value) > 1) { utf8ch_t u8char; /* check for a valid utf8 character */ if (!OPTS_FLAG(UTF8) || !utf8_to(&u8char, (const unsigned char *)lex->tok.value, 8)) { if (lexwarn(lex, WARN_MULTIBYTE_CHARACTER, ( OPTS_FLAG(UTF8) ? "invalid multibyte character sequence `%s`" : "multibyte character: `%s`" ), lex->tok.value)) return (lex->tok.ttype = TOKEN_ERROR); } else lex->tok.constval.i = u8char; } else lex->tok.constval.i = lex->tok.value[0]; } return lex->tok.ttype; } if (util_isdigit(ch)) { lex->tok.ttype = lex_finish_digit(lex, ch); lex_endtoken(lex); return lex->tok.ttype; } if (lex->flags.preprocessing) { lex_tokench(lex, ch); lex_endtoken(lex); return (lex->tok.ttype = ch); } lexerror(lex, "unknown token: `%c`", ch); return (lex->tok.ttype = TOKEN_ERROR); }