mirror of
https://github.com/git/git.git
synced 2024-11-27 12:03:55 +08:00
5726a6b401
Change the common patter in the codebase of duplicating the initialization logic between an *_INIT macro and a corresponding *_init() function to use the macro as the canonical source of truth. Now we no longer need to keep the function up-to-date with the macro version. This implements a suggestion by Jeff King who found that under -O2 [1] modern compilers will init new version in place without the extra copy[1]. The performance of a single *_init() won't matter in most cases, but even if it does we're going to be producing efficient machine code to perform these operations. 1. https://lore.kernel.org/git/YNyrDxUO1PlGJvCn@coredump.intra.peff.net/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
2.0 KiB
C
109 lines
2.0 KiB
C
#include "cache.h"
|
|
#include "strvec.h"
|
|
#include "strbuf.h"
|
|
|
|
const char *empty_strvec[] = { NULL };
|
|
|
|
void strvec_init(struct strvec *array)
|
|
{
|
|
struct strvec blank = STRVEC_INIT;
|
|
memcpy(array, &blank, sizeof(*array));
|
|
}
|
|
|
|
static void strvec_push_nodup(struct strvec *array, const char *value)
|
|
{
|
|
if (array->v == empty_strvec)
|
|
array->v = NULL;
|
|
|
|
ALLOC_GROW(array->v, array->nr + 2, array->alloc);
|
|
array->v[array->nr++] = value;
|
|
array->v[array->nr] = NULL;
|
|
}
|
|
|
|
const char *strvec_push(struct strvec *array, const char *value)
|
|
{
|
|
strvec_push_nodup(array, xstrdup(value));
|
|
return array->v[array->nr - 1];
|
|
}
|
|
|
|
const char *strvec_pushf(struct strvec *array, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
struct strbuf v = STRBUF_INIT;
|
|
|
|
va_start(ap, fmt);
|
|
strbuf_vaddf(&v, fmt, ap);
|
|
va_end(ap);
|
|
|
|
strvec_push_nodup(array, strbuf_detach(&v, NULL));
|
|
return array->v[array->nr - 1];
|
|
}
|
|
|
|
void strvec_pushl(struct strvec *array, ...)
|
|
{
|
|
va_list ap;
|
|
const char *arg;
|
|
|
|
va_start(ap, array);
|
|
while ((arg = va_arg(ap, const char *)))
|
|
strvec_push(array, arg);
|
|
va_end(ap);
|
|
}
|
|
|
|
void strvec_pushv(struct strvec *array, const char **items)
|
|
{
|
|
for (; *items; items++)
|
|
strvec_push(array, *items);
|
|
}
|
|
|
|
void strvec_pop(struct strvec *array)
|
|
{
|
|
if (!array->nr)
|
|
return;
|
|
free((char *)array->v[array->nr - 1]);
|
|
array->v[array->nr - 1] = NULL;
|
|
array->nr--;
|
|
}
|
|
|
|
void strvec_split(struct strvec *array, const char *to_split)
|
|
{
|
|
while (isspace(*to_split))
|
|
to_split++;
|
|
for (;;) {
|
|
const char *p = to_split;
|
|
|
|
if (!*p)
|
|
break;
|
|
|
|
while (*p && !isspace(*p))
|
|
p++;
|
|
strvec_push_nodup(array, xstrndup(to_split, p - to_split));
|
|
|
|
while (isspace(*p))
|
|
p++;
|
|
to_split = p;
|
|
}
|
|
}
|
|
|
|
void strvec_clear(struct strvec *array)
|
|
{
|
|
if (array->v != empty_strvec) {
|
|
int i;
|
|
for (i = 0; i < array->nr; i++)
|
|
free((char *)array->v[i]);
|
|
free(array->v);
|
|
}
|
|
strvec_init(array);
|
|
}
|
|
|
|
const char **strvec_detach(struct strvec *array)
|
|
{
|
|
if (array->v == empty_strvec)
|
|
return xcalloc(1, sizeof(const char *));
|
|
else {
|
|
const char **ret = array->v;
|
|
strvec_init(array);
|
|
return ret;
|
|
}
|
|
}
|