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opengl32: Add a helper function to correctly compare extension strings.

This commit is contained in:
Alexandre Julliard 2012-06-26 16:12:06 +02:00
parent a384fbee20
commit b349aa676f
1 changed files with 16 additions and 2 deletions
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18
dlls/opengl32/wgl.c
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@ -393,6 +393,20 @@ int WINAPI wglGetLayerPaletteEntries(HDC hdc,
return 0;
}
/* check if the extension is present in the list */
static BOOL has_extension( const char *list, const char *ext )
{
size_t len = strlen( ext );
while (list)
{
while (*list == ' ') list++;
if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
list = strchr( list, ' ' );
}
return FALSE;
}
static int compar(const void *elt_a, const void *elt_b) {
return strcmp(((const OpenGL_extension *) elt_a)->name,
((const OpenGL_extension *) elt_b)->name);
@ -417,7 +431,7 @@ static BOOL is_extension_supported(const char* extension)
* if the OpenGL extension required for the function we are looking up is supported. */
/* Check if the extension is part of the GL extension string to see if it is supported. */
if(strstr(gl_ext_string, extension) != NULL)
if (has_extension(gl_ext_string, extension))
return TRUE;
/* In general an OpenGL function starts as an ARB/EXT extension and at some stage
@ -1028,7 +1042,7 @@ const GLubyte * WINAPI wine_glGetString( GLenum name )
TRACE("- %s:", ThisExtn);
/* test if supported API is disabled by config */
if (!internal_gl_disabled_extensions || !strstr(internal_gl_disabled_extensions, ThisExtn)) {
if (!has_extension(internal_gl_disabled_extensions, ThisExtn)) {
strcat(internal_gl_extensions, " ");
strcat(internal_gl_extensions, ThisExtn);
TRACE(" active\n");