scriptvals_lexer.lpp

/*
	This file is part of Warzone 2100.
	Copyright (C) 1999-2004  Eidos Interactive
	Copyright (C) 2005-2019  Warzone 2100 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
*/
%{
/*
 * ScriptVals.l
 *
 * lexer for loading script variable values
 *
 */
#include "lib/framework/frame.h"

#include <physfs.h>

#include "lib/script/script.h"
#include "src/scriptvals.h"

/* Get the Yacc definitions */
#if defined (WZ_CC_MSVC)
#include "scriptvals_parser.hpp"
#else
#include "scriptvals_parser.h"
#endif

/* Maximum length for any TEXT value */
#ifndef YYLMAX
#define YYLMAX	255
#endif

/* Store for any string values */
static char aText[TEXT_BUFFERS][YYLMAX];
static UDWORD currText=0;

#include "lib/framework/lexer_input.h"

#ifndef yyextra
# define yyextra yyget_extra()
#endif

#define yylval (&scrv_lval)

/* Older GNU Flex versions don't define yyget_extra(), yyset_extra(),
 * yyget_text() and yyget_lineno().
 * (and neither define a subminor version)
 */
#if !defined(YY_FLEX_SUBMINOR_VERSION) || (YY_FLEX_SUBMINOR_VERSION < 9)
# define yyget_extra  scrv_get_extra
# define yyset_extra  scrv_set_extra
# define yyget_lineno scrv_get_lineno
# define yyget_text   scrv_get_text
extern void yyset_extra(YY_EXTRA_TYPE user_defined);
extern YY_EXTRA_TYPE yyget_extra(void);
extern int yyget_lineno(void);
int yyget_lineno()
{
	return yylineno;
}

extern char* yyget_text(void);
char* yyget_text()
{
	return yytext;
}
#elif defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION == 33
extern YY_EXTRA_TYPE yyget_extra(void);
extern int scrv_get_lineno(void);
extern FILE *scrv_get_in(void);
extern FILE *scrv_get_out(void);
extern int scrv_get_leng(void);
extern char *scrv_get_text(void);
extern void scrv_set_lineno(int line_number);
extern void scrv_set_in(FILE* in_str);
extern void scrv_set_out(FILE* out_str);
extern int scrv_get_debug(void);
extern void scrv_set_debug(int bdebug);
extern int scrv_lex_destroy(void);
extern void scrv_set_extra(YY_EXTRA_TYPE user_defined);
#endif

%}

%option yylineno noyywrap nounput never-interactive
%option warn nodefault
%option prefix="scrv_"

%x COMMENT
%x SLCOMMENT
%x QUOTE

%%

	/* Keywords */
int							{ yylval->tval = VAL_INT; return TYPE; }
INT							{ yylval->tval = VAL_INT; return TYPE; }
bool						{ yylval->tval = VAL_BOOL; return TYPE; }
BOOL						{ yylval->tval = VAL_BOOL; return TYPE; }
script						return SCRIPT;
store						return STORE;
run							return RUN;

true						{ yylval->bval = true;	 return BOOLEAN_T; }
TRUE						{ yylval->bval = true;	 return BOOLEAN_T; }
false						{ yylval->bval = false;	 return BOOLEAN_T; }
FALSE						{ yylval->bval = false;	 return BOOLEAN_T; }

	/* Match text values */
[a-zA-Z][-0-9_a-zA-Z]*		{
								INTERP_TYPE type;
								UDWORD		index;

								/* See if this is a variable id or a type */
								if (scrvLookUpType(yytext, &type))
								{
									yylval->tval = type;
									return TYPE;
								}
								else if (scrvLookUpVar(yytext, &index))
								{
									yylval->vindex = index;
									return VAR;
								}
								else if (scrvLookUpArray(yytext, &index))
								{
									yylval->vindex = index;
									return ARRAY;
								}
								else
								{
									strcpy(aText[currText], yytext);
									yylval->sval = aText[currText];
									currText = (currText + 1) % TEXT_BUFFERS;
									return IDENT;
								}
							}

	/* Match integer numbers */
-?[0-9]+					{ yylval->ival = atol(yytext); return INTEGER; }

	/* Match quoted text */
\"							{ BEGIN QUOTE; }
<QUOTE>\"					{ BEGIN 0; }
<QUOTE>\n					{ scrv_error("Unexpected end of line in string"); }
<QUOTE>[^\"\n]*				{
								strcpy(aText[currText], yytext);
								yylval->sval = aText[currText];
								currText = (currText + 1) % TEXT_BUFFERS;
								return QTEXT;
							}

	/* Skip white space */
[ \t\n\x0d\x0a]						;

	/* Strip comments */
"/*"						{ BEGIN COMMENT; }
<COMMENT>"*/" |
<COMMENT>"*/"\n				{ 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 yytext[0];

%%

static YY_EXTRA_TYPE pBuffer = NULL;

void yyset_extra(YY_EXTRA_TYPE user_defined)
{
	pBuffer = user_defined;
}

YY_EXTRA_TYPE yyget_extra()
{
	return pBuffer;
}

/* Older GNU Flex versions don't define yylex_destroy()
 * (and neither define a subminor version)
 */
#if !defined(YY_FLEX_SUBMINOR_VERSION) || (YY_FLEX_SUBMINOR_VERSION < 9)
int scrv_lex_destroy(void)
{
	/* For non-reentrant C scanner only. */
	yy_delete_buffer(YY_CURRENT_BUFFER);
	yy_init = 1;
	return 0;
}
#endif