glcpp-lex.l

%{
/*
 * Copyright © 2010 Intel Corporation
 *
 * 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 (including the next
 * paragraph) 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 <stdio.h>
#include <string.h>

#include "glcpp.h"
#include "glcpp-parse.h"
%}

%option reentrant noyywrap
%option extra-type="glcpp_parser_t *"

%x ST_DEFINE
%x ST_DEFINE_OBJ_OR_FUNC
%x ST_DEFINE_PARAMETER
%x ST_DEFINE_VALUE
%x ST_IF
%x ST_UNDEF
%x ST_UNDEF_END

SPACE		[[:space:]]
NONSPACE	[^[:space:]]
NEWLINE		[\n]
HSPACE		[ \t]
HASH		^{HSPACE}*#{HSPACE}*
INTEGER		[0-9]+
IDENTIFIER	[_a-zA-Z][_a-zA-Z0-9]*
TOKEN		[^[:space:](),]+

%%

{HASH}if{HSPACE}* {
	BEGIN ST_IF;
	return IF;
}

{HASH}elif{HSPACE}* {
	BEGIN ST_IF;
	return ELIF;
}

<ST_IF>{INTEGER} {
	yylval.ival = atoi (yytext);
	return INTEGER;
}

<ST_IF>"defined" {
	return DEFINED;
}

<ST_IF>"<<" {
	return LEFT_SHIFT;
}

<ST_IF>">>" {
	return RIGHT_SHIFT;
}

<ST_IF>"<=" {
	return LESS_OR_EQUAL;
}

<ST_IF>">=" {
	return GREATER_OR_EQUAL;
}

<ST_IF>"==" {
	return EQUAL;
}

<ST_IF>"!=" {
	return NOT_EQUAL;
}

<ST_IF>"&&" {
	return AND;
}

<ST_IF>"||" {
	return OR;
}

<ST_IF>[-+*/%<>&^|()] {
	return yytext[0];
}

<ST_IF>{IDENTIFIER} {
	yylval.str = xtalloc_strdup (yyextra, yytext);
	return IDENTIFIER;
}

<ST_IF>{HSPACE}+

<ST_IF>\n {
	BEGIN INITIAL;
	return NEWLINE;
}

{HASH}endif{HSPACE}* {
	return ENDIF;
}

{HASH}else{HSPACE}* {
	return ELSE;
}

{HASH}undef{HSPACE}* {
	BEGIN ST_UNDEF;
	return UNDEF;
}

<ST_UNDEF>{IDENTIFIER} {
	BEGIN ST_UNDEF_END;
	yylval.str = xtalloc_strdup (yyextra, yytext);
	return IDENTIFIER;
}

<ST_UNDEF_END>{HSPACE}*

<ST_UNDEF_END>\n {
	BEGIN INITIAL;
}

	/* We use the ST_DEFINE and ST_DEFVAL states so that we can
	 * pass a space token, (yes, a token for whitespace!), since
	 * the preprocessor specification requires distinguishing
	 * "#define foo()" from "#define foo ()".
	 */
{HASH}define{HSPACE}* {
	BEGIN ST_DEFINE;
	return DEFINE;
}

<ST_DEFINE>{IDENTIFIER}	{
	BEGIN ST_DEFINE_OBJ_OR_FUNC;
	yylval.str = xtalloc_strdup (yyextra, yytext);
	return IDENTIFIER;
}

<ST_DEFINE_OBJ_OR_FUNC>\n {
	BEGIN INITIAL;
	return NEWLINE;
}

<ST_DEFINE_OBJ_OR_FUNC>{HSPACE}+ {
	BEGIN ST_DEFINE_VALUE;
	return SPACE;
}

<ST_DEFINE_OBJ_OR_FUNC>"(" {
	BEGIN ST_DEFINE_PARAMETER;
	return '(';
}

<ST_DEFINE_PARAMETER>{IDENTIFIER} {
	yylval.str = xtalloc_strdup (yyextra, yytext);
	return IDENTIFIER;
}

<ST_DEFINE_PARAMETER>"," {
	return ',';
}

<ST_DEFINE_PARAMETER>")" {
	BEGIN ST_DEFINE_VALUE;
	return ')';
}

<ST_DEFINE_PARAMETER>{HSPACE}+

<ST_DEFINE_VALUE>{TOKEN} {
	yylval.token.type = TOKEN;
	yylval.token.value = xtalloc_strdup (yyextra, yytext);
	return TOKEN;
}

<ST_DEFINE_VALUE>[(),] {
	yylval.token.type = TOKEN;
	yylval.token.value = xtalloc_strdup (yyextra, yytext);
	return TOKEN;
}

<ST_DEFINE_VALUE>{HSPACE}+

<ST_DEFINE_VALUE>\n {
	BEGIN INITIAL;
	return NEWLINE;
}

{IDENTIFIER} {
	int parameter_index;
	yylval.str = xtalloc_strdup (yyextra, yytext);
	switch (glcpp_parser_classify_token (yyextra, yylval.str,
					     &parameter_index))
	{
		case TOKEN_CLASS_IDENTIFIER:
			return IDENTIFIER;
		break;
		case TOKEN_CLASS_IDENTIFIER_FINALIZED:
			return IDENTIFIER_FINALIZED;
		break;
		case TOKEN_CLASS_FUNC_MACRO:
			return FUNC_MACRO;
		break;
		case TOKEN_CLASS_OBJ_MACRO:
			return OBJ_MACRO;
		break;

	}
}

[(),]	{
	return yytext[0];
}

{TOKEN} {
	yylval.token.type = TOKEN;
	yylval.token.value = xtalloc_strdup (yyextra, yytext);
	return TOKEN;
}

\n {
	yyextra->need_newline = 1;
}

{HSPACE}+

%%