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tag: v1.7.11.2
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#include "cache.h"
#include "argv-array.h"
#include "strbuf.h"

const char *empty_argv[] = { NULL };

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_pushl(struct argv_array *array, ...)
{
va_list ap;
const char *arg;

va_start(ap, array);
while((arg = va_arg(ap, const char *)))
argv_array_push(array, arg);
va_end(ap);
}

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);
}
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