1%{
2/*
3 * Copyright © 2010 Intel Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <ctype.h>
28
29#include "glcpp.h"
30#include "glcpp-parse.h"
31
32/* Flex annoyingly generates some functions without making them
33 * static. Let's declare them here. */
34int glcpp_get_column  (yyscan_t yyscanner);
35void glcpp_set_column (int  column_no , yyscan_t yyscanner);
36
37#define YY_NO_INPUT
38
39#define YY_USER_ACTION                                          \
40   do {                                                         \
41      yylloc->first_column = yycolumn + 1;                      \
42      yylloc->first_line = yylineno;                            \
43      yycolumn += yyleng;                                       \
44   } while(0);
45
46#define YY_USER_INIT			\
47	do {				\
48		yylineno = 1;		\
49		yycolumn = 1;		\
50		yylloc->source = 0;	\
51	} while(0)
52%}
53
54%option bison-bridge bison-locations reentrant noyywrap
55%option extra-type="glcpp_parser_t *"
56%option prefix="glcpp_"
57%option stack
58%option never-interactive
59
60%x DONE COMMENT UNREACHABLE
61
62SPACE		[[:space:]]
63NONSPACE	[^[:space:]]
64NEWLINE		[\n]
65HSPACE		[ \t]
66HASH		^{HSPACE}*#{HSPACE}*
67IDENTIFIER	[_a-zA-Z][_a-zA-Z0-9]*
68PUNCTUATION	[][(){}.&*~!/%<>^|;,=+-]
69OTHER		[^][(){}.&*~!/%<>^|;,=#[:space:]+-]+
70
71DIGITS			[0-9][0-9]*
72DECIMAL_INTEGER		[1-9][0-9]*[uU]?
73OCTAL_INTEGER		0[0-7]*[uU]?
74HEXADECIMAL_INTEGER	0[xX][0-9a-fA-F]+[uU]?
75
76%%
77
78	/* Single-line comments */
79"//"[^\n]* {
80}
81
82	/* Multi-line comments */
83"/*"                    { yy_push_state(COMMENT, yyscanner); }
84<COMMENT>[^*\n]*
85<COMMENT>[^*\n]*\n      { yylineno++; yycolumn = 0; return NEWLINE; }
86<COMMENT>"*"+[^*/\n]*
87<COMMENT>"*"+[^*/\n]*\n { yylineno++; yycolumn = 0; return NEWLINE; }
88<COMMENT>"*"+"/"        {
89	yy_pop_state(yyscanner);
90	if (yyextra->space_tokens)
91		return SPACE;
92}
93
94{HASH}version {
95	yylval->str = talloc_strdup (yyextra, yytext);
96	yyextra->space_tokens = 0;
97	return HASH_VERSION;
98}
99
100	/* glcpp doesn't handle #extension, #version, or #pragma directives.
101	 * Simply pass them through to the main compiler's lexer/parser. */
102{HASH}(extension|pragma)[^\n]+ {
103	yylval->str = talloc_strdup (yyextra, yytext);
104	yylineno++;
105	yycolumn = 0;
106	return OTHER;
107}
108
109{HASH}line{HSPACE}+{DIGITS}{HSPACE}+{DIGITS}{HSPACE}*$ {
110	/* Eat characters until the first digit is
111	 * encountered
112	 */
113	char *ptr = yytext;
114	while (!isdigit(*ptr))
115		ptr++;
116
117	/* Subtract one from the line number because
118	 * yylineno is zero-based instead of
119	 * one-based.
120	 */
121	yylineno = strtol(ptr, &ptr, 0) - 1;
122	yylloc->source = strtol(ptr, NULL, 0);
123}
124
125{HASH}line{HSPACE}+{DIGITS}{HSPACE}*$ {
126	/* Eat characters until the first digit is
127	 * encountered
128	 */
129	char *ptr = yytext;
130	while (!isdigit(*ptr))
131		ptr++;
132
133	/* Subtract one from the line number because
134	 * yylineno is zero-based instead of
135	 * one-based.
136	 */
137	yylineno = strtol(ptr, &ptr, 0) - 1;
138}
139
140{HASH}ifdef/.*\n {
141	yyextra->lexing_if = 1;
142	yyextra->space_tokens = 0;
143	return HASH_IFDEF;
144}
145
146{HASH}ifndef/.*\n {
147	yyextra->lexing_if = 1;
148	yyextra->space_tokens = 0;
149	return HASH_IFNDEF;
150}
151
152{HASH}if/[^_a-zA-Z0-9].*\n {
153	yyextra->lexing_if = 1;
154	yyextra->space_tokens = 0;
155	return HASH_IF;
156}
157
158{HASH}elif/.*\n {
159	yyextra->lexing_if = 1;
160	yyextra->space_tokens = 0;
161	return HASH_ELIF;
162}
163
164{HASH}else/.*\n {
165	yyextra->space_tokens = 0;
166	return HASH_ELSE;
167}
168
169{HASH}endif/.*\n {
170	yyextra->space_tokens = 0;
171	return HASH_ENDIF;
172}
173
174	/* When skipping (due to an #if 0 or similar) consume anything
175	 * up to a newline. We do this with less priority than any
176	 * #if-related directive (#if, #elif, #else, #endif), but with
177	 * more priority than any other directive or token to avoid
178	 * any side-effects from skipped content.
179	 *
180	 * We use the lexing_if flag to avoid skipping any part of an
181	 * if conditional expression. */
182[^\n]+/\n {
183	/* Since this rule always matches, YY_USER_ACTION gets called for it,
184	 * wrongly incrementing yycolumn.  We undo that effect here. */
185	yycolumn -= yyleng;
186	if (yyextra->lexing_if ||
187	    yyextra->skip_stack == NULL ||
188	    yyextra->skip_stack->type == SKIP_NO_SKIP)
189	{
190		REJECT;
191	}
192}
193
194{HASH}error.* {
195	char *p;
196	for (p = yytext; !isalpha(p[0]); p++); /* skip "  #   " */
197	p += 5; /* skip "error" */
198	glcpp_error(yylloc, yyextra, "#error%s", p);
199}
200
201{HASH}define{HSPACE}+/{IDENTIFIER}"(" {
202	yyextra->space_tokens = 0;
203	return HASH_DEFINE_FUNC;
204}
205
206{HASH}define {
207	yyextra->space_tokens = 0;
208	return HASH_DEFINE_OBJ;
209}
210
211{HASH}undef {
212	yyextra->space_tokens = 0;
213	return HASH_UNDEF;
214}
215
216{HASH} {
217	yyextra->space_tokens = 0;
218	return HASH;
219}
220
221{DECIMAL_INTEGER} {
222	yylval->str = talloc_strdup (yyextra, yytext);
223	return INTEGER_STRING;
224}
225
226{OCTAL_INTEGER} {
227	yylval->str = talloc_strdup (yyextra, yytext);
228	return INTEGER_STRING;
229}
230
231{HEXADECIMAL_INTEGER} {
232	yylval->str = talloc_strdup (yyextra, yytext);
233	return INTEGER_STRING;
234}
235
236"<<"  {
237	return LEFT_SHIFT;
238}
239
240">>" {
241	return RIGHT_SHIFT;
242}
243
244"<=" {
245	return LESS_OR_EQUAL;
246}
247
248">=" {
249	return GREATER_OR_EQUAL;
250}
251
252"==" {
253	return EQUAL;
254}
255
256"!=" {
257	return NOT_EQUAL;
258}
259
260"&&" {
261	return AND;
262}
263
264"||" {
265	return OR;
266}
267
268"##" {
269	return PASTE;
270}
271
272"defined" {
273	return DEFINED;
274}
275
276{IDENTIFIER} {
277	yylval->str = talloc_strdup (yyextra, yytext);
278	return IDENTIFIER;
279}
280
281{PUNCTUATION} {
282	return yytext[0];
283}
284
285{OTHER}+ {
286	yylval->str = talloc_strdup (yyextra, yytext);
287	return OTHER;
288}
289
290{HSPACE}+ {
291	if (yyextra->space_tokens) {
292		return SPACE;
293	}
294}
295
296\n {
297	yyextra->lexing_if = 0;
298	yylineno++;
299	yycolumn = 0;
300	return NEWLINE;
301}
302
303	/* Handle missing newline at EOF. */
304<INITIAL><<EOF>> {
305	BEGIN DONE; /* Don't keep matching this rule forever. */
306	yyextra->lexing_if = 0;
307	return NEWLINE;
308}
309
310	/* We don't actually use the UNREACHABLE start condition. We
311	only have this action here so that we can pretend to call some
312	generated functions, (to avoid "defined but not used"
313	warnings. */
314<UNREACHABLE>. {
315	unput('.');
316	yy_top_state(yyextra);
317}
318
319%%
320
321void
322glcpp_lex_set_source_string(glcpp_parser_t *parser, const char *shader)
323{
324	yy_scan_string(shader, parser->scanner);
325}
326