df7428eca4
Allow detaching of ownership of the argv_array's contents and add a function to free those detached argv_arrays later. This makes it possible to use argv_array efficiently with the exiting struct child_process which only contains a member char **argv. Add to documentation. Signed-off-by: Florian Achleitner <florian.achleitner.2.6.31@gmail.com> Acked-by: David Michael Barr <b@rr-dav.id.au> Signed-off-by: Junio C Hamano <gitster@pobox.com>
82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
#include "cache.h"
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#include "argv-array.h"
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#include "strbuf.h"
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const char *empty_argv[] = { NULL };
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void argv_array_init(struct argv_array *array)
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{
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array->argv = empty_argv;
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array->argc = 0;
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array->alloc = 0;
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}
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static void argv_array_push_nodup(struct argv_array *array, const char *value)
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{
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if (array->argv == empty_argv)
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array->argv = NULL;
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ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
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array->argv[array->argc++] = value;
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array->argv[array->argc] = NULL;
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}
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void argv_array_push(struct argv_array *array, const char *value)
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{
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argv_array_push_nodup(array, xstrdup(value));
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}
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void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
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{
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va_list ap;
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struct strbuf v = STRBUF_INIT;
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va_start(ap, fmt);
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strbuf_vaddf(&v, fmt, ap);
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va_end(ap);
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argv_array_push_nodup(array, strbuf_detach(&v, NULL));
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}
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void argv_array_pushl(struct argv_array *array, ...)
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{
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va_list ap;
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const char *arg;
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va_start(ap, array);
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while((arg = va_arg(ap, const char *)))
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argv_array_push(array, arg);
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va_end(ap);
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}
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void argv_array_clear(struct argv_array *array)
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{
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if (array->argv != empty_argv) {
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int i;
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for (i = 0; i < array->argc; i++)
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free((char **)array->argv[i]);
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free(array->argv);
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}
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argv_array_init(array);
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}
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const char **argv_array_detach(struct argv_array *array, int *argc)
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{
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const char **argv =
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array->argv == empty_argv || array->argc == 0 ? NULL : array->argv;
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if (argc)
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*argc = array->argc;
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argv_array_init(array);
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return argv;
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}
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void argv_array_free_detached(const char **argv)
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{
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if (argv) {
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int i;
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for (i = 0; argv[i]; i++)
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free((char **)argv[i]);
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free(argv);
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}
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}
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