mirror of
https://github.com/git/git.git
synced 2024-12-12 03:14:11 +08:00
c1189caeaf
The submodule code recently grew generic code to build a dynamic argv array. Many other parts of the code can reuse this, too, so let's make it generically available. There are two enhancements not found in the original code: 1. We now handle the NULL-termination invariant properly, even when no strings have been pushed (before, you could have an empty, NULL argv). This was not a problem for the submodule code, which always pushed at least one argument, but was not sufficiently safe for generic code. 2. There is a formatted variant of the "push" function. This is a convenience function which was not needed by the submodule code, but will make it easier to port other users to the new code. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#include "cache.h"
|
|
#include "argv-array.h"
|
|
#include "strbuf.h"
|
|
|
|
static const char *empty_argv_storage = NULL;
|
|
const char **empty_argv = &empty_argv_storage;
|
|
|
|
void argv_array_init(struct argv_array *array)
|
|
{
|
|
array->argv = empty_argv;
|
|
array->argc = 0;
|
|
array->alloc = 0;
|
|
}
|
|
|
|
static void argv_array_push_nodup(struct argv_array *array, const char *value)
|
|
{
|
|
if (array->argv == empty_argv)
|
|
array->argv = NULL;
|
|
|
|
ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
|
|
array->argv[array->argc++] = value;
|
|
array->argv[array->argc] = NULL;
|
|
}
|
|
|
|
void argv_array_push(struct argv_array *array, const char *value)
|
|
{
|
|
argv_array_push_nodup(array, xstrdup(value));
|
|
}
|
|
|
|
void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
struct strbuf v = STRBUF_INIT;
|
|
|
|
va_start(ap, fmt);
|
|
strbuf_vaddf(&v, fmt, ap);
|
|
va_end(ap);
|
|
|
|
argv_array_push_nodup(array, strbuf_detach(&v, NULL));
|
|
}
|
|
|
|
void argv_array_clear(struct argv_array *array)
|
|
{
|
|
if (array->argv != empty_argv) {
|
|
int i;
|
|
for (i = 0; i < array->argc; i++)
|
|
free((char **)array->argv[i]);
|
|
free(array->argv);
|
|
}
|
|
argv_array_init(array);
|
|
}
|