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authormarha <marha@users.sourceforge.net>2012-01-20 09:41:09 +0100
committermarha <marha@users.sourceforge.net>2012-01-20 09:41:09 +0100
commitc5f912c7b9248440bf9dff4b3c64513ec0f3ec98 (patch)
tree7986b288489dac6a8a70787dbdedfc0c064a0c02 /mesalib/src/glsl/s_expression.cpp
parent27bec2ba601ec12334e6b7564034f87ab7c9522b (diff)
parenta8ef69cc0c9e5281e6b745dd4a2be75f629eb8b8 (diff)
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Merge remote-tracking branch 'origin/released'
Diffstat (limited to 'mesalib/src/glsl/s_expression.cpp')
-rw-r--r--mesalib/src/glsl/s_expression.cpp36
1 files changed, 22 insertions, 14 deletions
diff --git a/mesalib/src/glsl/s_expression.cpp b/mesalib/src/glsl/s_expression.cpp
index e704a3be2..57de9d334 100644
--- a/mesalib/src/glsl/s_expression.cpp
+++ b/mesalib/src/glsl/s_expression.cpp
@@ -23,6 +23,7 @@
*/
#include <assert.h>
+#include <limits>
#include "s_expression.h"
s_symbol::s_symbol(const char *str, size_t n)
@@ -64,21 +65,28 @@ read_atom(void *ctx, const char *&src, char *&symbol_buffer)
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);
+ // Check for the special symbol '+INF', which means +Infinity. Note: C99
+ // requires strtod to parse '+INF' as +Infinity, but we still support some
+ // non-C99-compliant compilers (e.g. MSVC).
+ if (n == 4 && strncmp(src, "+INF", 4) == 0) {
+ expr = new(ctx) s_float(std::numeric_limits<float>::infinity());
} else {
- // Not a number; return a symbol.
- symbol_buffer[n] = '\0';
- expr = new(ctx) s_symbol(symbol_buffer, n);
+ // 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;