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authorMichal Krol <michal@vmware.com>2009-09-04 11:32:46 +0200
committerMichal Krol <michal@vmware.com>2009-09-07 10:12:00 +0200
commit87d2de04fbb7d9ea8eae9c58f7c7fb842ffe06f6 (patch)
tree7b705dd03e7828dd394c416be6035948084bc54b /src/glsl/pp/sl_pp_extension.c
parent94321b44416f47eb08bf72c93f4299ff7dc47017 (diff)
glsl: Implement `extension' preprocessor directive.
No extensions supported.
Diffstat (limited to 'src/glsl/pp/sl_pp_extension.c')
-rw-r--r--src/glsl/pp/sl_pp_extension.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_extension.c b/src/glsl/pp/sl_pp_extension.c
new file mode 100644
index 0000000000..3d223a1a54
--- /dev/null
+++ b/src/glsl/pp/sl_pp_extension.c
@@ -0,0 +1,129 @@
+/**************************************************************************
+ *
+ * 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 <stdlib.h>
+#include "sl_pp_process.h"
+
+
+int
+sl_pp_process_extension(struct sl_pp_context *context,
+ const struct sl_pp_token_info *input,
+ unsigned int first,
+ unsigned int last,
+ struct sl_pp_process_state *state)
+{
+ int all_extensions = -1;
+ const char *extension_name = NULL;
+ const char *behavior = NULL;
+ struct sl_pp_token_info out;
+
+ all_extensions = sl_pp_context_add_unique_str(context, "all");
+ if (all_extensions == -1) {
+ return -1;
+ }
+
+ if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+ extension_name = sl_pp_context_cstr(context, input[first].data.identifier);
+ first++;
+ }
+ if (!extension_name) {
+ strcpy(context->error_msg, "expected identifier after `#extension'");
+ return -1;
+ }
+
+ if (!strcmp(extension_name, "all")) {
+ out.data.extension = all_extensions;
+ } else {
+ out.data.extension = -1;
+ }
+
+ while (first < last && input[first].token == SL_PP_WHITESPACE) {
+ first++;
+ }
+
+ if (first < last && input[first].token == SL_PP_COLON) {
+ first++;
+ } else {
+ strcpy(context->error_msg, "expected `:' after extension name");
+ return -1;
+ }
+
+ while (first < last && input[first].token == SL_PP_WHITESPACE) {
+ first++;
+ }
+
+ if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+ behavior = sl_pp_context_cstr(context, input[first].data.identifier);
+ first++;
+ }
+ if (!behavior) {
+ strcpy(context->error_msg, "expected identifier after `:'");
+ return -1;
+ }
+
+ if (!strcmp(behavior, "require")) {
+ strcpy(context->error_msg, "unable to enable required extension");
+ return -1;
+ } else if (!strcmp(behavior, "enable")) {
+ if (out.data.extension == all_extensions) {
+ strcpy(context->error_msg, "unable to enable all extensions");
+ return -1;
+ } else {
+ return 0;
+ }
+ } else if (!strcmp(behavior, "warn")) {
+ if (out.data.extension == all_extensions) {
+ out.token = SL_PP_EXTENSION_WARN;
+ } else {
+ return 0;
+ }
+ } else if (!strcmp(behavior, "disable")) {
+ if (out.data.extension == all_extensions) {
+ out.token = SL_PP_EXTENSION_DISABLE;
+ } else {
+ return 0;
+ }
+ } else {
+ strcpy(context->error_msg, "unrecognised behavior name");
+ return -1;
+ }
+
+ while (first < last && input[first].token == SL_PP_WHITESPACE) {
+ first++;
+ }
+
+ if (first < last) {
+ strcpy(context->error_msg, "expected end of line after behavior name");
+ return -1;
+ }
+
+ if (sl_pp_process_out(state, &out)) {
+ return -1;
+ }
+
+ return 0;
+}