116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1997 Greg Lewis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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*/
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#include "qbsp.h"
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#include "parser.h"
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void
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ParserInit(parser_t *p, const char *data)
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{
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p->linenum = 1;
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p->pos = data;
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p->unget = false;
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}
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bool
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ParseToken(parser_t *p, parseflags_t flags)
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{
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char *token_p;
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/* is a token already waiting? */
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if (p->unget) {
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p->unget = false;
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return true;
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}
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skipspace:
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/* skip space */
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while (*p->pos <= 32) {
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if (!*p->pos) {
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if (flags & PARSE_OPTIONAL)
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return false;
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if (flags & PARSE_SAMELINE)
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Error("line %d: Line is incomplete", p->linenum);
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return false;
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}
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if (*p->pos == '\n') {
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if (flags & PARSE_OPTIONAL)
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return false;
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if (flags & PARSE_SAMELINE)
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Error("line %d: Line is incomplete", p->linenum);
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p->linenum++;
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}
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p->pos++;
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}
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/* comment field */
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if (p->pos[0] == '/' && p->pos[1] == '/') {
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if (flags & PARSE_COMMENT) {
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token_p = p->token;
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while (*p->pos && *p->pos != '\n') {
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*token_p++ = *p->pos++;
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if (token_p > &p->token[MAXTOKEN - 1])
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Error("line %d: Token too large", p->linenum);
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}
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goto out;
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}
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if (flags & PARSE_OPTIONAL)
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return false;
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if (flags & PARSE_SAMELINE)
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Error("line %d: Line is incomplete", p->linenum);
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while (*p->pos++ != '\n') {
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if (!*p->pos) {
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if (flags & PARSE_SAMELINE)
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Error("line %d: Line is incomplete", p->linenum);
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return false;
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}
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}
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goto skipspace;
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}
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if (flags & PARSE_COMMENT)
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return false;
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/* copy token */
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token_p = p->token;
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if (*p->pos == '"') {
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p->pos++;
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while (*p->pos != '"') {
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if (!*p->pos)
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Error("line %d: EOF inside quoted token", p->linenum);
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*token_p++ = *p->pos++;
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if (token_p > &p->token[MAXTOKEN - 1])
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Error("line %d: Token too large", p->linenum);
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}
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p->pos++;
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} else
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while (*p->pos > 32) {
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*token_p++ = *p->pos++;
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if (token_p > &p->token[MAXTOKEN - 1])
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Error("line %d: Token too large", p->linenum);
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}
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out:
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*token_p = 0;
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return true;
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}
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