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authormarha <marha@users.sourceforge.net>2011-09-12 11:27:51 +0200
committermarha <marha@users.sourceforge.net>2011-09-12 11:27:51 +0200
commitdafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0 (patch)
treebdf833cc6a4fc9035411779e10dd9e8478201885 /mesalib/src/glsl/s_expression.cpp
parent0b40f5f4b54453a77f4b09c431f8efc6875da61f (diff)
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Synchronised line endinge with release branch
Diffstat (limited to 'mesalib/src/glsl/s_expression.cpp')
-rw-r--r--mesalib/src/glsl/s_expression.cpp422
1 files changed, 211 insertions, 211 deletions
diff --git a/mesalib/src/glsl/s_expression.cpp b/mesalib/src/glsl/s_expression.cpp
index b6a51c34e..e704a3be2 100644
--- a/mesalib/src/glsl/s_expression.cpp
+++ b/mesalib/src/glsl/s_expression.cpp
@@ -1,211 +1,211 @@
-/* -*- c++ -*- */
-/*
- * Copyright © 2010 Intel Corporation
- *
- * 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, sublicense,
- * 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 NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS 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 <assert.h>
-#include "s_expression.h"
-
-s_symbol::s_symbol(const char *str, size_t n)
-{
- /* Assume the given string is already nul-terminated and in memory that
- * will live as long as this node.
- */
- assert(str[n] == '\0');
- this->str = str;
-}
-
-s_list::s_list()
-{
-}
-
-static void
-skip_whitespace(const char *&src, char *&symbol_buffer)
-{
- size_t n = strspn(src, " \v\t\r\n");
- src += n;
- symbol_buffer += n;
- /* Also skip Scheme-style comments: semi-colon 'til end of line */
- if (src[0] == ';') {
- n = strcspn(src, "\n");
- src += n;
- symbol_buffer += n;
- skip_whitespace(src, symbol_buffer);
- }
-}
-
-static s_expression *
-read_atom(void *ctx, const char *&src, char *&symbol_buffer)
-{
- s_expression *expr = NULL;
-
- skip_whitespace(src, symbol_buffer);
-
- size_t n = strcspn(src, "( \v\t\r\n);");
- if (n == 0)
- return NULL; // no atom
-
- // Check if the atom is a number.
- char *float_end = NULL;
- double f = glsl_strtod(src, &float_end);
- if (float_end != src) {
- char *int_end = NULL;
- int i = strtol(src, &int_end, 10);
- // If strtod matched more characters, it must have a decimal part
- if (float_end > int_end)
- expr = new(ctx) s_float(f);
- else
- expr = new(ctx) s_int(i);
- } else {
- // Not a number; return a symbol.
- symbol_buffer[n] = '\0';
- expr = new(ctx) s_symbol(symbol_buffer, n);
- }
-
- src += n;
- symbol_buffer += n;
-
- return expr;
-}
-
-static s_expression *
-__read_expression(void *ctx, const char *&src, char *&symbol_buffer)
-{
- s_expression *atom = read_atom(ctx, src, symbol_buffer);
- if (atom != NULL)
- return atom;
-
- skip_whitespace(src, symbol_buffer);
- if (src[0] == '(') {
- ++src;
- ++symbol_buffer;
-
- s_list *list = new(ctx) s_list;
- s_expression *expr;
-
- while ((expr = __read_expression(ctx, src, symbol_buffer)) != NULL) {
- list->subexpressions.push_tail(expr);
- }
- skip_whitespace(src, symbol_buffer);
- if (src[0] != ')') {
- printf("Unclosed expression (check your parenthesis).\n");
- return NULL;
- }
- ++src;
- ++symbol_buffer;
- return list;
- }
- return NULL;
-}
-
-s_expression *
-s_expression::read_expression(void *ctx, const char *&src)
-{
- assert(src != NULL);
-
- /* When we encounter a Symbol, we need to save a nul-terminated copy of
- * the string. However, ralloc_strndup'ing every individual Symbol is
- * extremely expensive. We could avoid this by simply overwriting the
- * next character (guaranteed to be whitespace, parens, or semicolon) with
- * a nul-byte. But overwriting non-whitespace would mess up parsing.
- *
- * So, just copy the whole buffer ahead of time. Walk both, leaving the
- * original source string unmodified, and altering the copy to contain the
- * necessary nul-bytes whenever we encounter a symbol.
- */
- char *symbol_buffer = ralloc_strdup(ctx, src);
- return __read_expression(ctx, src, symbol_buffer);
-}
-
-void s_int::print()
-{
- printf("%d", this->val);
-}
-
-void s_float::print()
-{
- printf("%f", this->val);
-}
-
-void s_symbol::print()
-{
- printf("%s", this->str);
-}
-
-void s_list::print()
-{
- printf("(");
- foreach_iter(exec_list_iterator, it, this->subexpressions) {
- s_expression *expr = (s_expression*) it.get();
- expr->print();
- if (!expr->next->is_tail_sentinel())
- printf(" ");
- }
- printf(")");
-}
-
-// --------------------------------------------------
-
-bool
-s_pattern::match(s_expression *expr)
-{
- switch (type)
- {
- case EXPR: *p_expr = expr; break;
- case LIST: if (expr->is_list()) *p_list = (s_list *) expr; break;
- case SYMBOL: if (expr->is_symbol()) *p_symbol = (s_symbol *) expr; break;
- case NUMBER: if (expr->is_number()) *p_number = (s_number *) expr; break;
- case INT: if (expr->is_int()) *p_int = (s_int *) expr; break;
- case STRING:
- s_symbol *sym = SX_AS_SYMBOL(expr);
- if (sym != NULL && strcmp(sym->value(), literal) == 0)
- return true;
- return false;
- };
-
- return *p_expr == expr;
-}
-
-bool
-s_match(s_expression *top, unsigned n, s_pattern *pattern, bool partial)
-{
- s_list *list = SX_AS_LIST(top);
- if (list == NULL)
- return false;
-
- unsigned i = 0;
- foreach_iter(exec_list_iterator, it, list->subexpressions) {
- if (i >= n)
- return partial; /* More actual items than the pattern expected */
-
- s_expression *expr = (s_expression *) it.get();
- if (expr == NULL || !pattern[i].match(expr))
- return false;
-
- i++;
- }
-
- if (i < n)
- return false; /* Less actual items than the pattern expected */
-
- return true;
-}
+/* -*- c++ -*- */
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 <assert.h>
+#include "s_expression.h"
+
+s_symbol::s_symbol(const char *str, size_t n)
+{
+ /* Assume the given string is already nul-terminated and in memory that
+ * will live as long as this node.
+ */
+ assert(str[n] == '\0');
+ this->str = str;
+}
+
+s_list::s_list()
+{
+}
+
+static void
+skip_whitespace(const char *&src, char *&symbol_buffer)
+{
+ size_t n = strspn(src, " \v\t\r\n");
+ src += n;
+ symbol_buffer += n;
+ /* Also skip Scheme-style comments: semi-colon 'til end of line */
+ if (src[0] == ';') {
+ n = strcspn(src, "\n");
+ src += n;
+ symbol_buffer += n;
+ skip_whitespace(src, symbol_buffer);
+ }
+}
+
+static s_expression *
+read_atom(void *ctx, const char *&src, char *&symbol_buffer)
+{
+ s_expression *expr = NULL;
+
+ skip_whitespace(src, symbol_buffer);
+
+ size_t n = strcspn(src, "( \v\t\r\n);");
+ if (n == 0)
+ return NULL; // no atom
+
+ // Check if the atom is a number.
+ char *float_end = NULL;
+ double f = glsl_strtod(src, &float_end);
+ if (float_end != src) {
+ char *int_end = NULL;
+ int i = strtol(src, &int_end, 10);
+ // If strtod matched more characters, it must have a decimal part
+ if (float_end > int_end)
+ expr = new(ctx) s_float(f);
+ else
+ expr = new(ctx) s_int(i);
+ } else {
+ // Not a number; return a symbol.
+ symbol_buffer[n] = '\0';
+ expr = new(ctx) s_symbol(symbol_buffer, n);
+ }
+
+ src += n;
+ symbol_buffer += n;
+
+ return expr;
+}
+
+static s_expression *
+__read_expression(void *ctx, const char *&src, char *&symbol_buffer)
+{
+ s_expression *atom = read_atom(ctx, src, symbol_buffer);
+ if (atom != NULL)
+ return atom;
+
+ skip_whitespace(src, symbol_buffer);
+ if (src[0] == '(') {
+ ++src;
+ ++symbol_buffer;
+
+ s_list *list = new(ctx) s_list;
+ s_expression *expr;
+
+ while ((expr = __read_expression(ctx, src, symbol_buffer)) != NULL) {
+ list->subexpressions.push_tail(expr);
+ }
+ skip_whitespace(src, symbol_buffer);
+ if (src[0] != ')') {
+ printf("Unclosed expression (check your parenthesis).\n");
+ return NULL;
+ }
+ ++src;
+ ++symbol_buffer;
+ return list;
+ }
+ return NULL;
+}
+
+s_expression *
+s_expression::read_expression(void *ctx, const char *&src)
+{
+ assert(src != NULL);
+
+ /* When we encounter a Symbol, we need to save a nul-terminated copy of
+ * the string. However, ralloc_strndup'ing every individual Symbol is
+ * extremely expensive. We could avoid this by simply overwriting the
+ * next character (guaranteed to be whitespace, parens, or semicolon) with
+ * a nul-byte. But overwriting non-whitespace would mess up parsing.
+ *
+ * So, just copy the whole buffer ahead of time. Walk both, leaving the
+ * original source string unmodified, and altering the copy to contain the
+ * necessary nul-bytes whenever we encounter a symbol.
+ */
+ char *symbol_buffer = ralloc_strdup(ctx, src);
+ return __read_expression(ctx, src, symbol_buffer);
+}
+
+void s_int::print()
+{
+ printf("%d", this->val);
+}
+
+void s_float::print()
+{
+ printf("%f", this->val);
+}
+
+void s_symbol::print()
+{
+ printf("%s", this->str);
+}
+
+void s_list::print()
+{
+ printf("(");
+ foreach_iter(exec_list_iterator, it, this->subexpressions) {
+ s_expression *expr = (s_expression*) it.get();
+ expr->print();
+ if (!expr->next->is_tail_sentinel())
+ printf(" ");
+ }
+ printf(")");
+}
+
+// --------------------------------------------------
+
+bool
+s_pattern::match(s_expression *expr)
+{
+ switch (type)
+ {
+ case EXPR: *p_expr = expr; break;
+ case LIST: if (expr->is_list()) *p_list = (s_list *) expr; break;
+ case SYMBOL: if (expr->is_symbol()) *p_symbol = (s_symbol *) expr; break;
+ case NUMBER: if (expr->is_number()) *p_number = (s_number *) expr; break;
+ case INT: if (expr->is_int()) *p_int = (s_int *) expr; break;
+ case STRING:
+ s_symbol *sym = SX_AS_SYMBOL(expr);
+ if (sym != NULL && strcmp(sym->value(), literal) == 0)
+ return true;
+ return false;
+ };
+
+ return *p_expr == expr;
+}
+
+bool
+s_match(s_expression *top, unsigned n, s_pattern *pattern, bool partial)
+{
+ s_list *list = SX_AS_LIST(top);
+ if (list == NULL)
+ return false;
+
+ unsigned i = 0;
+ foreach_iter(exec_list_iterator, it, list->subexpressions) {
+ if (i >= n)
+ return partial; /* More actual items than the pattern expected */
+
+ s_expression *expr = (s_expression *) it.get();
+ if (expr == NULL || !pattern[i].match(expr))
+ return false;
+
+ i++;
+ }
+
+ if (i < n)
+ return false; /* Less actual items than the pattern expected */
+
+ return true;
+}