summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMichal Krol <[email protected]>2009-06-13 13:43:22 +0200
committerMichal Krol <[email protected]>2009-09-07 10:11:33 +0200
commit229e72956ca6844647bd64d864716b8e21aff89b (patch)
treedbc2c23778ed883053e22ae590bf0645379451b4
parent0d5ef796f847bc51888a8883110cc607494a61f0 (diff)
glsl: Parse optional version directive.
-rw-r--r--src/glsl/pp/SConscript1
-rw-r--r--src/glsl/pp/sl_pp_version.c150
-rw-r--r--src/glsl/pp/sl_pp_version.h39
3 files changed, 190 insertions, 0 deletions
diff --git a/src/glsl/pp/SConscript b/src/glsl/pp/SConscript
index a08f5cf6321..0bc519759d0 100644
--- a/src/glsl/pp/SConscript
+++ b/src/glsl/pp/SConscript
@@ -10,6 +10,7 @@ glsl = env.StaticLibrary(
source = [
'sl_pp_purify.c',
'sl_pp_token.c',
+ 'sl_pp_version.c',
],
)
Export('glsl')
diff --git a/src/glsl/pp/sl_pp_version.c b/src/glsl/pp/sl_pp_version.c
new file mode 100644
index 00000000000..f4b4b829d1e
--- /dev/null
+++ b/src/glsl/pp/sl_pp_version.c
@@ -0,0 +1,150 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 "sl_pp_version.h"
+
+
+static int
+_parse_integer(const char *input,
+ unsigned int *number)
+{
+ unsigned int n = 0;
+
+ while (*input >= '0' && *input <= '9') {
+ if (n * 10 < n) {
+ /* Overflow. */
+ return -1;
+ }
+
+ n = n * 10 + (*input++ - '0');
+ }
+
+ if (*input != '\0') {
+ /* Invalid decimal number. */
+ return -1;
+ }
+
+ *number = n;
+ return 0;
+}
+
+
+int
+sl_pp_version(const struct sl_pp_token_info *input,
+ unsigned int *version,
+ unsigned int *tokens_eaten)
+{
+ unsigned int i = 0;
+ int found_hash = 0;
+ int found_version = 0;
+ int found_number = 0;
+
+ /* Default values if `#version' is not present. */
+ *version = 110;
+ *tokens_eaten = 0;
+
+ /* Skip whitespace and newlines and seek for hash. */
+ while (!found_hash) {
+ switch (input[i].token) {
+ case SL_PP_WHITESPACE:
+ case SL_PP_NEWLINE:
+ i++;
+ break;
+
+ case SL_PP_HASH:
+ i++;
+ found_hash = 1;
+ break;
+
+ default:
+ return 0;
+ }
+ }
+
+ /* Skip whitespace and seek for `version'. */
+ while (!found_version) {
+ switch (input[i].token) {
+ case SL_PP_WHITESPACE:
+ i++;
+ break;
+
+ case SL_PP_IDENTIFIER:
+ if (strcmp(input[i].data.identifier, "version")) {
+ return 0;
+ }
+ i++;
+ found_version = 1;
+ break;
+
+ default:
+ return 0;
+ }
+ }
+
+ /* Skip whitespace and seek for version number. */
+ while (!found_number) {
+ switch (input[i].token) {
+ case SL_PP_WHITESPACE:
+ i++;
+ break;
+
+ case SL_PP_NUMBER:
+ if (_parse_integer(input[i].data.number, version)) {
+ /* Expected version number. */
+ return -1;
+ }
+ i++;
+ found_number = 1;
+ break;
+
+ default:
+ /* Expected version number. */
+ return -1;
+ }
+ }
+
+ /* Skip whitespace and seek for either newline or eof. */
+ for (;;) {
+ switch (input[i].token) {
+ case SL_PP_WHITESPACE:
+ i++;
+ break;
+
+ case SL_PP_NEWLINE:
+ case SL_PP_EOF:
+ i++;
+ *tokens_eaten = i;
+ return 0;
+
+ default:
+ /* Expected end of line. */
+ return -1;
+ }
+ }
+
+ /* Should not get here. */
+}
diff --git a/src/glsl/pp/sl_pp_version.h b/src/glsl/pp/sl_pp_version.h
new file mode 100644
index 00000000000..7deee1a1349
--- /dev/null
+++ b/src/glsl/pp/sl_pp_version.h
@@ -0,0 +1,39 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+#ifndef SL_PP_VERSION_H
+#define SL_PP_VERSION_H
+
+#include "sl_pp_token.h"
+
+
+int
+sl_pp_version(const struct sl_pp_token_info *input,
+ unsigned int *version,
+ unsigned int *tokens_eaten);
+
+#endif /* SL_PP_VERSION_H */