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Diffstat (limited to 'src/glsl/pp/sl_pp_process.c')
-rw-r--r--src/glsl/pp/sl_pp_process.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_process.c b/src/glsl/pp/sl_pp_process.c
new file mode 100644
index 0000000000..f89986dd8e
--- /dev/null
+++ b/src/glsl/pp/sl_pp_process.c
@@ -0,0 +1,327 @@
+/**************************************************************************
+ *
+ * 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_context.h"
+#include "sl_pp_process.h"
+#include "sl_pp_public.h"
+
+
+int
+sl_pp_process_out(struct sl_pp_process_state *state,
+ const struct sl_pp_token_info *token)
+{
+ if (state->out_len >= state->out_max) {
+ unsigned int new_max = state->out_max;
+
+ if (new_max < 0x100) {
+ new_max = 0x100;
+ } else if (new_max < 0x10000) {
+ new_max *= 2;
+ } else {
+ new_max += 0x10000;
+ }
+
+ state->out = realloc(state->out, new_max * sizeof(struct sl_pp_token_info));
+ if (!state->out) {
+ return -1;
+ }
+ state->out_max = new_max;
+ }
+
+ state->out[state->out_len++] = *token;
+ return 0;
+}
+
+int
+sl_pp_process_get(struct sl_pp_context *context,
+ struct sl_pp_token_info *output)
+{
+ if (!context->process_state.out) {
+ if (context->line > 1) {
+ struct sl_pp_token_info ti;
+
+ ti.token = SL_PP_LINE;
+ ti.data.line.lineno = context->line - 1;
+ ti.data.line.fileno = context->file;
+ if (sl_pp_process_out(&context->process_state, &ti)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+
+ ti.token = SL_PP_NEWLINE;
+ if (sl_pp_process_out(&context->process_state, &ti)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ }
+ }
+
+ for (;;) {
+ struct sl_pp_token_info input;
+ int found_eof = 0;
+
+ if (context->process_state.out_len) {
+ *output = context->process_state.out[0];
+
+ if (context->process_state.out_len > 1) {
+ unsigned int i;
+
+ for (i = 1; i < context->process_state.out_len; i++) {
+ context->process_state.out[i - 1] = context->process_state.out[i];
+ }
+ }
+ context->process_state.out_len--;
+
+ return 0;
+ }
+
+ if (sl_pp_token_buffer_skip_white(&context->tokens, &input)) {
+ return -1;
+ }
+ if (input.token == SL_PP_HASH) {
+ if (sl_pp_token_buffer_skip_white(&context->tokens, &input)) {
+ return -1;
+ }
+ switch (input.token) {
+ case SL_PP_IDENTIFIER:
+ {
+ int name;
+ int found_eol = 0;
+ struct sl_pp_token_info endof;
+ struct sl_pp_token_peek peek;
+ int result = 0;
+
+ /* Directive name. */
+ name = input.data.identifier;
+
+ if (sl_pp_token_buffer_skip_white(&context->tokens, &input)) {
+ return -1;
+ }
+ sl_pp_token_buffer_unget(&context->tokens, &input);
+
+ if (sl_pp_token_peek_init(&peek, &context->tokens)) {
+ return -1;
+ }
+
+ while (!found_eol) {
+ if (sl_pp_token_peek_get(&peek, &input)) {
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+ switch (input.token) {
+ case SL_PP_NEWLINE:
+ /* Preserve newline just for the sake of line numbering. */
+ endof = input;
+ found_eol = 1;
+ break;
+
+ case SL_PP_EOF:
+ endof = input;
+ found_eof = 1;
+ found_eol = 1;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (name == context->dict._if) {
+ struct sl_pp_token_buffer buffer;
+
+ result = sl_pp_token_peek_to_buffer(&peek, &buffer);
+ if (result == 0) {
+ result = sl_pp_process_if(context, &buffer);
+ sl_pp_token_buffer_destroy(&buffer);
+ }
+ } else if (name == context->dict.ifdef) {
+ result = sl_pp_process_ifdef(context, peek.tokens, 0, peek.size - 1);
+ } else if (name == context->dict.ifndef) {
+ result = sl_pp_process_ifndef(context, peek.tokens, 0, peek.size - 1);
+ } else if (name == context->dict.elif) {
+ struct sl_pp_token_buffer buffer;
+
+ result = sl_pp_token_peek_to_buffer(&peek, &buffer);
+ if (result == 0) {
+ result = sl_pp_process_elif(context, &buffer);
+ sl_pp_token_buffer_destroy(&buffer);
+ }
+ } else if (name == context->dict._else) {
+ result = sl_pp_process_else(context, peek.tokens, 0, peek.size - 1);
+ } else if (name == context->dict.endif) {
+ result = sl_pp_process_endif(context, peek.tokens, 0, peek.size - 1);
+ } else if (context->if_value) {
+ if (name == context->dict.define) {
+ result = sl_pp_process_define(context, peek.tokens, 0, peek.size - 1);
+ } else if (name == context->dict.error) {
+ sl_pp_process_error(context, peek.tokens, 0, peek.size - 1);
+ result = -1;
+ } else if (name == context->dict.extension) {
+ result = sl_pp_process_extension(context, peek.tokens, 0, peek.size - 1, &context->process_state);
+ } else if (name == context->dict.line) {
+ struct sl_pp_token_buffer buffer;
+
+ result = sl_pp_token_peek_to_buffer(&peek, &buffer);
+ if (result == 0) {
+ result = sl_pp_process_line(context, &buffer, &context->process_state);
+ sl_pp_token_buffer_destroy(&buffer);
+ }
+ } else if (name == context->dict.pragma) {
+ result = sl_pp_process_pragma(context, peek.tokens, 0, peek.size - 1, &context->process_state);
+ } else if (name == context->dict.undef) {
+ result = sl_pp_process_undef(context, peek.tokens, 0, peek.size - 1);
+ } else {
+ strcpy(context->error_msg, "unrecognised directive name");
+ result = -1;
+ }
+ }
+
+ sl_pp_token_peek_commit(&peek);
+ sl_pp_token_peek_destroy(&peek);
+
+ if (result) {
+ return result;
+ }
+
+ if (sl_pp_process_out(&context->process_state, &endof)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ context->line++;
+ }
+ break;
+
+ case SL_PP_NEWLINE:
+ /* Empty directive. */
+ if (sl_pp_process_out(&context->process_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ context->line++;
+ break;
+
+ case SL_PP_EOF:
+ /* Empty directive. */
+ if (sl_pp_process_out(&context->process_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ found_eof = 1;
+ break;
+
+ default:
+ strcpy(context->error_msg, "expected a directive name");
+ return -1;
+ }
+ } else {
+ int found_eol = 0;
+
+ sl_pp_token_buffer_unget(&context->tokens, &input);
+
+ while (!found_eol) {
+ if (sl_pp_token_buffer_get(&context->tokens, &input)) {
+ return -1;
+ }
+
+ switch (input.token) {
+ case SL_PP_WHITESPACE:
+ /* Drop whitespace all together at this point. */
+ break;
+
+ case SL_PP_NEWLINE:
+ /* Preserve newline just for the sake of line numbering. */
+ if (sl_pp_process_out(&context->process_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ context->line++;
+ found_eol = 1;
+ break;
+
+ case SL_PP_EOF:
+ if (sl_pp_process_out(&context->process_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ found_eof = 1;
+ found_eol = 1;
+ break;
+
+ case SL_PP_IDENTIFIER:
+ sl_pp_token_buffer_unget(&context->tokens, &input);
+ if (sl_pp_macro_expand(context, &context->tokens, NULL, &context->process_state,
+ context->if_value ? sl_pp_macro_expand_normal : sl_pp_macro_expand_mute)) {
+ return -1;
+ }
+ break;
+
+ default:
+ if (context->if_value) {
+ if (sl_pp_process_out(&context->process_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ }
+ }
+ }
+ }
+
+ if (found_eof) {
+ if (context->if_ptr != SL_PP_MAX_IF_NESTING) {
+ strcpy(context->error_msg, "expected `#endif' directive");
+ return -1;
+ }
+ }
+ }
+}
+
+int
+sl_pp_process(struct sl_pp_context *context,
+ struct sl_pp_token_info **output)
+{
+ struct sl_pp_process_state state;
+
+ memset(&state, 0, sizeof(state));
+ for (;;) {
+ struct sl_pp_token_info input;
+
+ if (sl_pp_process_get(context, &input)) {
+ free(state.out);
+ return -1;
+ }
+ if (sl_pp_process_out(&state, &input)) {
+ free(state.out);
+ return -1;
+ }
+ if (input.token == SL_PP_EOF) {
+ *output = state.out;
+ return 0;
+ }
+ }
+}
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