warzone2100/lib/framework/resource_lexer.l

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/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2007 Warzone Resurrection Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
%{
/*
* resource.l
*
* Lex file for parsing res files
*/
#include <stdio.h>
/* Allow frame header files to be singly included */
#define FRAME_LIB_INCLUDE
#include <string.h>
#include "lib/framework/types.h"
#include "lib/framework/debug.h"
#include "lib/framework/resly.h"
/* Get the Yacc definitions */
#include "resource_parser.tab.h"
void res_error(const char *pMessage,...);
#ifndef YYLMAX
#define YYLMAX 8192
#endif
/* Store for any string values */
char aText[TEXT_BUFFERS][YYLMAX]; // No longer static ... lets use this area globally
static UDWORD currText=0;
// Note if we are in a comment
static BOOL inComment = FALSE;
/* Pointer to the input buffer */
static const char *pInputBuffer = NULL;
static const char *pEndBuffer = NULL;
#define YY_INPUT(buf,result,max_size) \
if (pInputBuffer != pEndBuffer) { \
buf[0] = *(pInputBuffer++); result = 1; \
} else { \
buf[0] = EOF; result = YY_NULL; \
}
%}
%option nounput
%option prefix="res_"
%option yylineno
%x COMMENT
%x QUOTE
%x SLCOMMENT
%%
/* Match to key words */
directory { return DIRECTORY; }
file { return FILETOKEN; }
/* Match text values */
[a-zA-Z][-0-9_a-zA-Z]* {
strcpy(aText[currText], res_text);
res_lval.sval = aText[currText];
currText = (currText + 1) % TEXT_BUFFERS;
return TEXT_T;
}
/* Match quoted text */
\" { BEGIN QUOTE; }
<QUOTE>\" { BEGIN 0; }
<QUOTE>\n { res_error("Unexpected end of line in string"); }
<QUOTE>[^\"\n]* {
strcpy(aText[currText], res_text);
res_lval.sval = aText[currText];
currText = (currText + 1) % TEXT_BUFFERS;
return QTEXT_T;
}
\"\" {
aText[currText][0] = '\0';
aText[currText][1] = '\0';
res_lval.sval = aText[currText];
currText = (currText + 1) % TEXT_BUFFERS;
return QTEXT_T;
}
/* Skip white space */
[ \t\n\x0d\x0a] ;
/* Strip comments */
"/*" { inComment=TRUE; BEGIN COMMENT; }
<COMMENT>"*/" |
<COMMENT>"*/"\n { inComment=FALSE; BEGIN 0; }
<COMMENT>. |
<COMMENT>\n ;
/* Strip single line comments */
"//" { BEGIN SLCOMMENT; }
<SLCOMMENT>\n { BEGIN 0; }
<SLCOMMENT>[^\n]* ;
/* Match anything that's been missed and pass it as a char */
. return res_text[0];
%%
/* Set the current input buffer for the lexer */
void resSetInputBuffer(char *pBuffer, UDWORD size)
{
pInputBuffer = pBuffer;
pEndBuffer = pBuffer + size;
/* Reset the lexer incase it's been used before */
res__flush_buffer(YY_CURRENT_BUFFER);
inComment = FALSE;
}
void resGetErrorData(int *pLine, char **ppText)
{
*pLine = res_lineno;
*ppText = res_text;
}
int res_wrap(void)
{
if (inComment)
{
debug( LOG_ERROR, "Warning: reached end of file in a comment" );
abort();
}
return 1;
}