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Add a strset "class"

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It's just a wrapper around hashtab, but it makes checking if a string is
in a set easy. Way overkill when only a few extensions are enabled, but
more might come later.
This commit is contained in:
Bill Currie 2019-07-10 13:09:16 +09:00
parent 31ead15e96
commit ed3c5cb9ec
2 changed files with 32 additions and 0 deletions
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27
libs/video/renderer/vulkan/util.c
View file

@ -33,8 +33,35 @@
# include <strings.h>
#endif
#include "QF/hash.h"
#include "util.h"
static const char *
strset_get_key (const void *_str, void *unused)
{
return (const char *)_str;
}
strset_t *
new_strset (const char * const *strings)
{
hashtab_t *tab = Hash_NewTable (61, strset_get_key, 0, 0);
for ( ; *strings; strings++) {
Hash_Add (tab, (void *) *strings);
}
return (strset_t *) tab;
}
void del_strset (strset_t *strset)
{
Hash_DelTable ((hashtab_t *) strset);
}
int strset_contains (strset_t *strset, const char *str)
{
return Hash_Find ((hashtab_t *) strset, str) != 0;
}
int
count_strings (const char * const *str)
{

5
libs/video/renderer/vulkan/util.h
View file

@ -8,4 +8,9 @@ void merge_strings (const char **out, const char * const *in1,
void prune_strings (const char * const *reference, const char **strings,
uint32_t *count);
typedef struct strset_s strset_t;
strset_t *new_strset (const char * const *strings);
void del_strset (strset_t *strset);
int strset_contains (strset_t *strset, const char *str);
#endif//__util_h