Mesa (glsl-pp-rework-1): glsl: Add preprocessor skeleton for directive parsing.
Michał Król
michal at kemper.freedesktop.org
Mon Jun 15 09:02:12 UTC 2009
Module: Mesa
Branch: glsl-pp-rework-1
Commit: 309e7124cb9bbccd9092374fbda9adbd0b0993ea
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=309e7124cb9bbccd9092374fbda9adbd0b0993ea
Author: Michal Krol <michal at vmware.com>
Date: Mon Jun 15 11:01:20 2009 +0200
glsl: Add preprocessor skeleton for directive parsing.
---
src/glsl/pp/SConscript | 1 +
src/glsl/pp/sl_pp_process.c | 157 +++++++++++++++++++++++++++++++++++++++++++
src/glsl/pp/sl_pp_process.h | 38 ++++++++++
3 files changed, 196 insertions(+), 0 deletions(-)
diff --git a/src/glsl/pp/SConscript b/src/glsl/pp/SConscript
index 0bc5197..0be2114 100644
--- a/src/glsl/pp/SConscript
+++ b/src/glsl/pp/SConscript
@@ -8,6 +8,7 @@ env = env.Clone()
glsl = env.StaticLibrary(
target = 'glsl',
source = [
+ 'sl_pp_process.c',
'sl_pp_purify.c',
'sl_pp_token.c',
'sl_pp_version.c',
diff --git a/src/glsl/pp/sl_pp_process.c b/src/glsl/pp/sl_pp_process.c
new file mode 100644
index 0000000..56b8fab
--- /dev/null
+++ b/src/glsl/pp/sl_pp_process.c
@@ -0,0 +1,157 @@
+/**************************************************************************
+ *
+ * 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 <string.h>
+#include "sl_pp_process.h"
+
+
+enum process_state {
+ state_seek_hash,
+ state_seek_directive,
+ state_seek_newline,
+ state_expand
+};
+
+int
+sl_pp_process(const struct sl_pp_token_info *input,
+ struct sl_pp_token_info **output)
+{
+ unsigned int i = 0;
+ enum process_state state = state_seek_hash;
+ struct sl_pp_token_info *out = NULL;
+ unsigned int out_len = 0;
+ unsigned int out_max = 0;
+
+ for (;;) {
+ struct sl_pp_token_info info;
+ int info_valid = 0;
+
+ switch (input[i].token) {
+ case SL_PP_WHITESPACE:
+ /* Drop whitespace alltogether at this point. */
+ i++;
+ break;
+
+ case SL_PP_NEWLINE:
+ case SL_PP_EOF:
+ /* Preserve newline just for the sake of line numbering. */
+ info = input[i];
+ info_valid = 1;
+ i++;
+ /* Restart directive parsing. */
+ state = state_seek_hash;
+ break;
+
+ case SL_PP_HASH:
+ if (state == state_seek_hash) {
+ i++;
+ state = state_seek_directive;
+ } else {
+ /* Error: unexpected token. */
+ return -1;
+ }
+ break;
+
+ case SL_PP_IDENTIFIER:
+ if (state == state_seek_hash) {
+ info = input[i];
+ info_valid = 1;
+ i++;
+ state = state_expand;
+ } else if (state == state_seek_directive) {
+ i++;
+ state = state_seek_newline;
+ } else if (state == state_expand) {
+ info = input[i];
+ info_valid = 1;
+ i++;
+ } else {
+ i++;
+ }
+ break;
+
+ default:
+ if (state == state_seek_hash) {
+ info = input[i];
+ info_valid = 1;
+ i++;
+ state = state_expand;
+ } else if (state == state_seek_directive) {
+ /* Error: expected directive name. */
+ return -1;
+ } else if (state == state_expand) {
+ info = input[i];
+ info_valid = 1;
+ i++;
+ } else {
+ i++;
+ }
+ }
+
+ if (info_valid) {
+ if (out_len >= out_max) {
+ unsigned int new_max = out_max;
+
+ if (new_max < 0x100) {
+ new_max = 0x100;
+ } else if (new_max < 0x10000) {
+ new_max *= 2;
+ } else {
+ new_max += 0x10000;
+ }
+
+ out = realloc(out, new_max * sizeof(struct sl_pp_token_info));
+ if (!out) {
+ return -1;
+ }
+ out_max = new_max;
+ }
+
+ if (info.token == SL_PP_IDENTIFIER) {
+ info.data.identifier = strdup(info.data.identifier);
+ if (!info.data.identifier) {
+ return -1;
+ }
+ } else if (info.token == SL_PP_NUMBER) {
+ info.data.number = strdup(info.data.number);
+ if (!info.data.number) {
+ return -1;
+ }
+ }
+
+ out[out_len++] = info;
+
+ if (info.token == SL_PP_EOF) {
+ break;
+ }
+ }
+ }
+
+ *output = out;
+ return 0;
+}
diff --git a/src/glsl/pp/sl_pp_process.h b/src/glsl/pp/sl_pp_process.h
new file mode 100644
index 0000000..6e930ca
--- /dev/null
+++ b/src/glsl/pp/sl_pp_process.h
@@ -0,0 +1,38 @@
+/**************************************************************************
+ *
+ * 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_PROCESS_H
+#define SL_PP_PROCESS_H
+
+#include "sl_pp_token.h"
+
+
+int
+sl_pp_process(const struct sl_pp_token_info *input,
+ struct sl_pp_token_info **output);
+
+#endif /* SL_PP_PROCESS_H */
More information about the mesa-commit
mailing list