util: port _mesa_strto[df] to C

_mesa_strtod and _mesa_strtof are only used from the GLSL compiler and
the ARB_[vertex|fragment]_program code, meaning that the locale doesn't
need to be initialized before the first OpenGL context gets initialized.

So let's use explicit initialization from the one-time init code instead
of depending on a C++ compiler to initialize at image-load time.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/glsl/glcpp/glcpp.c

@@ -29,6 +29,7 @@
 #include "glcpp.h"
 #include "main/mtypes.h"
 #include "main/shaderobj.h"
+#include "util/strtod.h"
 
 extern int glcpp_parser_debug;
 
@@ -168,6 +169,8 @@ main (int argc, char *argv[])
 	if (shader == NULL)
 	   return 1;
 
+	_mesa_locale_init();
+
 	ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx);
 
 	printf("%s", shader);

src/glsl/main.cpp

@@ -38,6 +38,7 @@
 #include "program/hash_table.h"
 #include "loop_analysis.h"
 #include "standalone_scaffolding.h"
+#include "util/strtod.h"
 
 static int glsl_version = 330;
 
@@ -46,6 +47,8 @@ initialize_context(struct gl_context *ctx, gl_api api)
 {
    initialize_context_to_defaults(ctx, api);
 
+   _mesa_locale_init();
+
    /* The standalone compiler needs to claim support for almost
     * everything in order to compile the built-in functions.
     */

src/mesa/main/context.c

@@ -120,6 +120,7 @@
 #include "shaderobj.h"
 #include "shaderimage.h"
 #include "util/simple_list.h"
+#include "util/strtod.h"
 #include "state.h"
 #include "stencil.h"
 #include "texcompress_s3tc.h"
@@ -374,6 +375,8 @@ one_time_init( struct gl_context *ctx )
       assert( sizeof(GLint) == 4 );
       assert( sizeof(GLuint) == 4 );
 
+      _mesa_locale_init();
+
       _mesa_one_time_init_extension_overrides();
 
       _mesa_get_cpu_features();

src/util/Makefile.sources

@@ -19,7 +19,7 @@ MESA_UTIL_FILES :=	\
 	set.c \
 	set.h \
 	simple_list.h \
-	strtod.cpp \
+	strtod.c \
 	strtod.h \
 	texcompress_rgtc_tmp.h \
 	u_atomic.h

src/util/strtod.c

@@ -30,18 +30,20 @@
 #include <locale.h>
 #ifdef HAVE_XLOCALE_H
 #include <xlocale.h>
+static locale_t loc;
 #endif
 #endif
 
 #include "strtod.h"
 
 
+void
+_mesa_locale_init(void)
+{
 #if defined(_GNU_SOURCE) && defined(HAVE_XLOCALE_H)
-static struct locale_initializer {
-   locale_initializer() { loc = newlocale(LC_CTYPE_MASK, "C", NULL); }
-   locale_t loc;
-} loc_init;
+   loc = newlocale(LC_CTYPE_MASK, "C", NULL);
 #endif
+}
 
 /**
  * Wrapper around strtod which uses the "C" locale so the decimal
@@ -51,7 +53,7 @@ double
 _mesa_strtod(const char *s, char **end)
 {
 #if defined(_GNU_SOURCE) && defined(HAVE_XLOCALE_H)
-   return strtod_l(s, end, loc_init.loc);
+   return strtod_l(s, end, loc);
 #else
    return strtod(s, end);
 #endif
@@ -66,7 +68,7 @@ float
 _mesa_strtof(const char *s, char **end)
 {
 #if defined(_GNU_SOURCE) && defined(HAVE_XLOCALE_H)
-   return strtof_l(s, end, loc_init.loc);
+   return strtof_l(s, end, loc);
 #elif defined(HAVE_STRTOF)
    return strtof(s, end);
 #else

src/util/strtod.h

@@ -31,6 +31,9 @@
 extern "C" {
 #endif
 
+extern void
+_mesa_locale_init(void);
+
 extern double
 _mesa_strtod(const char *s, char **end);