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Diffstat (limited to 'src/glsl/pp/sl_pp_macro.c')
-rw-r--r--src/glsl/pp/sl_pp_macro.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_macro.c b/src/glsl/pp/sl_pp_macro.c
new file mode 100644
index 0000000000..9f520b8fc5
--- /dev/null
+++ b/src/glsl/pp/sl_pp_macro.c
@@ -0,0 +1,414 @@
+/**************************************************************************
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include "sl_pp_context.h"
+#include "sl_pp_public.h"
+#include "sl_pp_macro.h"
+#include "sl_pp_process.h"
+
+
+static void
+_macro_init(struct sl_pp_macro *macro)
+{
+ macro->name = -1;
+ macro->num_args = -1;
+ macro->arg = NULL;
+ macro->body = NULL;
+}
+
+struct sl_pp_macro *
+sl_pp_macro_new(void)
+{
+ struct sl_pp_macro *macro;
+
+ macro = calloc(1, sizeof(struct sl_pp_macro));
+ if (macro) {
+ _macro_init(macro);
+ }
+ return macro;
+}
+
+static void
+_macro_destroy(struct sl_pp_macro *macro)
+{
+ struct sl_pp_macro_formal_arg *arg = macro->arg;
+
+ while (arg) {
+ struct sl_pp_macro_formal_arg *next_arg = arg->next;
+
+ free(arg);
+ arg = next_arg;
+ }
+
+ free(macro->body);
+}
+
+void
+sl_pp_macro_free(struct sl_pp_macro *macro)
+{
+ while (macro) {
+ struct sl_pp_macro *next_macro = macro->next;
+
+ _macro_destroy(macro);
+ free(macro);
+ macro = next_macro;
+ }
+}
+
+void
+sl_pp_macro_reset(struct sl_pp_macro *macro)
+{
+ _macro_destroy(macro);
+ _macro_init(macro);
+}
+
+static int
+_out_number(struct sl_pp_context *context,
+ struct sl_pp_process_state *state,
+ unsigned int number)
+{
+ char buf[32];
+ struct sl_pp_token_info ti;
+
+ sprintf(buf, "%u", number);
+
+ ti.token = SL_PP_UINT;
+ ti.data._uint = sl_pp_context_add_unique_str(context, buf);
+ if (sl_pp_process_out(state, &ti)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+sl_pp_macro_expand(struct sl_pp_context *context,
+ struct sl_pp_token_buffer *tokens,
+ struct sl_pp_macro *local,
+ struct sl_pp_process_state *state,
+ enum sl_pp_macro_expand_behaviour behaviour)
+{
+ int mute = (behaviour == sl_pp_macro_expand_mute);
+ struct sl_pp_token_info input;
+ int macro_name;
+ struct sl_pp_macro *macro = NULL;
+ struct sl_pp_macro *actual_arg = NULL;
+ unsigned int j;
+
+ if (sl_pp_token_buffer_get(tokens, &input)) {
+ return -1;
+ }
+
+ if (input.token != SL_PP_IDENTIFIER) {
+ strcpy(context->error_msg, "expected an identifier");
+ return -1;
+ }
+
+ macro_name = input.data.identifier;
+
+ /* First look for predefined macros.
+ */
+
+ if (macro_name == context->dict.___LINE__) {
+ if (!mute && _out_number(context, state, context->line)) {
+ return -1;
+ }
+ return 0;
+ }
+ if (macro_name == context->dict.___FILE__) {
+ if (!mute && _out_number(context, state, context->file)) {
+ return -1;
+ }
+ return 0;
+ }
+ if (macro_name == context->dict.___VERSION__) {
+ if (!mute && _out_number(context, state, 110)) {
+ return -1;
+ }
+ return 0;
+ }
+
+ for (j = 0; j < context->num_predefined; j++) {
+ if (macro_name == context->predefined[j].name) {
+ if (!mute) {
+ struct sl_pp_token_info ti;
+
+ ti.token = SL_PP_UINT;
+ ti.data._uint = context->predefined[j].value;
+ if (sl_pp_process_out(state, &ti)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ }
+ return 0;
+ }
+ }
+
+ /* Replace extension names with 1.
+ */
+ for (j = 0; j < context->num_extensions; j++) {
+ if (macro_name == context->extensions[j].name) {
+ if (!mute && _out_number(context, state, 1)) {
+ return -1;
+ }
+ return 0;
+ }
+ }
+
+ if (local) {
+ for (macro = local; macro; macro = macro->next) {
+ if (macro->name == macro_name) {
+ break;
+ }
+ }
+ }
+
+ if (!macro) {
+ for (macro = context->macro; macro; macro = macro->next) {
+ if (macro->name == macro_name) {
+ break;
+ }
+ }
+ }
+
+ if (!macro) {
+ if (behaviour == sl_pp_macro_expand_unknown_to_0) {
+ if (_out_number(context, state, 0)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ } else if (!mute) {
+ if (sl_pp_process_out(state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ return -1;
+ }
+ }
+ return 0;
+ }
+
+ if (macro->num_args >= 0) {
+ if (sl_pp_token_buffer_skip_white(tokens, &input)) {
+ return -1;
+ }
+ if (input.token != SL_PP_LPAREN) {
+ strcpy(context->error_msg, "expected `('");
+ return -1;
+ }
+ if (sl_pp_token_buffer_skip_white(tokens, &input)) {
+ return -1;
+ }
+ sl_pp_token_buffer_unget(tokens, &input);
+ }
+
+ if (macro->num_args > 0) {
+ struct sl_pp_macro_formal_arg *formal_arg = macro->arg;
+ struct sl_pp_macro **pmacro = &actual_arg;
+
+ for (j = 0; j < (unsigned int)macro->num_args; j++) {
+ struct sl_pp_process_state arg_state;
+ int done = 0;
+ unsigned int paren_nesting = 0;
+ struct sl_pp_token_info eof;
+
+ memset(&arg_state, 0, sizeof(arg_state));
+
+ while (!done) {
+ if (sl_pp_token_buffer_get(tokens, &input)) {
+ goto fail_arg;
+ }
+ switch (input.token) {
+ case SL_PP_WHITESPACE:
+ break;
+
+ case SL_PP_COMMA:
+ if (!paren_nesting) {
+ if (j < (unsigned int)macro->num_args - 1) {
+ done = 1;
+ } else {
+ strcpy(context->error_msg, "too many actual macro arguments");
+ goto fail_arg;
+ }
+ } else {
+ if (sl_pp_process_out(&arg_state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ goto fail_arg;
+ }
+ }
+ break;
+
+ case SL_PP_LPAREN:
+ paren_nesting++;
+ if (sl_pp_process_out(&arg_state, &input)) {
+ goto oom_arg;
+ }
+ break;
+
+ case SL_PP_RPAREN:
+ if (!paren_nesting) {
+ if (j == (unsigned int)macro->num_args - 1) {
+ done = 1;
+ } else {
+ strcpy(context->error_msg, "too few actual macro arguments");
+ goto fail_arg;
+ }
+ } else {
+ paren_nesting--;
+ if (sl_pp_process_out(&arg_state, &input)) {
+ goto oom_arg;
+ }
+ }
+ break;
+
+ case SL_PP_IDENTIFIER:
+ sl_pp_token_buffer_unget(tokens, &input);
+ if (sl_pp_macro_expand(context, tokens, local, &arg_state, sl_pp_macro_expand_normal)) {
+ goto fail_arg;
+ }
+ break;
+
+ case SL_PP_EOF:
+ strcpy(context->error_msg, "too few actual macro arguments");
+ goto fail_arg;
+
+ default:
+ if (sl_pp_process_out(&arg_state, &input)) {
+ goto oom_arg;
+ }
+ }
+ }
+
+ eof.token = SL_PP_EOF;
+ if (sl_pp_process_out(&arg_state, &eof)) {
+ goto oom_arg;
+ }
+
+ *pmacro = sl_pp_macro_new();
+ if (!*pmacro) {
+ goto oom_arg;
+ }
+
+ (**pmacro).name = formal_arg->name;
+ (**pmacro).body = arg_state.out;
+
+ formal_arg = formal_arg->next;
+ pmacro = &(**pmacro).next;
+
+ continue;
+
+oom_arg:
+ strcpy(context->error_msg, "out of memory");
+fail_arg:
+ free(arg_state.out);
+ goto fail;
+ }
+ }
+
+ /* Right paren for non-empty argument list has already been eaten. */
+ if (macro->num_args == 0) {
+ if (sl_pp_token_buffer_skip_white(tokens, &input)) {
+ goto fail;
+ }
+ if (input.token != SL_PP_RPAREN) {
+ strcpy(context->error_msg, "expected `)'");
+ goto fail;
+ }
+ }
+
+ /* XXX: This is all wrong, we should be ungetting all tokens
+ * back to the main token buffer.
+ */
+ {
+ struct sl_pp_token_buffer buffer;
+
+ /* Seek to the end.
+ */
+ for (j = 0; macro->body[j].token != SL_PP_EOF; j++) {
+ }
+ j++;
+
+ /* Create a context-less token buffer since we are not going to underrun
+ * its internal buffer.
+ */
+ if (sl_pp_token_buffer_init(&buffer, NULL)) {
+ strcpy(context->error_msg, "out of memory");
+ goto fail;
+ }
+
+ /* Unget the tokens in reverse order so later they will be fetched correctly.
+ */
+ for (; j > 0; j--) {
+ sl_pp_token_buffer_unget(&buffer, &macro->body[j - 1]);
+ }
+
+ /* Expand.
+ */
+ for (;;) {
+ struct sl_pp_token_info input;
+
+ sl_pp_token_buffer_get(&buffer, &input);
+ switch (input.token) {
+ case SL_PP_NEWLINE:
+ if (sl_pp_process_out(state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ sl_pp_token_buffer_destroy(&buffer);
+ goto fail;
+ }
+ break;
+
+ case SL_PP_IDENTIFIER:
+ sl_pp_token_buffer_unget(&buffer, &input);
+ if (sl_pp_macro_expand(context, &buffer, actual_arg, state, behaviour)) {
+ sl_pp_token_buffer_destroy(&buffer);
+ goto fail;
+ }
+ break;
+
+ case SL_PP_EOF:
+ sl_pp_token_buffer_destroy(&buffer);
+ sl_pp_macro_free(actual_arg);
+ return 0;
+
+ default:
+ if (!mute) {
+ if (sl_pp_process_out(state, &input)) {
+ strcpy(context->error_msg, "out of memory");
+ sl_pp_token_buffer_destroy(&buffer);
+ goto fail;
+ }
+ }
+ }
+ }
+ }
+
+fail:
+ sl_pp_macro_free(actual_arg);
+ return -1;
+}
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