argv-array.c

   1 #include "cache.h"
   2 #include "argv-array.h"
   3 #include "strbuf.h"
   4
   5 static const char *empty_argv_storage = NULL;
   6 const char **empty_argv = &empty_argv_storage;
   7
   8 void argv_array_init(struct argv_array *array)
   9 {
  10         array->argv = empty_argv;
  11         array->argc = 0;
  12         array->alloc = 0;
  13 }
  14
  15 static void argv_array_push_nodup(struct argv_array *array, const char *value)
  16 {
  17         if (array->argv == empty_argv)
  18                 array->argv = NULL;
  19
  20         ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
  21         array->argv[array->argc++] = value;
  22         array->argv[array->argc] = NULL;
  23 }
  24
  25 void argv_array_push(struct argv_array *array, const char *value)
  26 {
  27         argv_array_push_nodup(array, xstrdup(value));
  28 }
  29
  30 void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
  31 {
  32         va_list ap;
  33         struct strbuf v = STRBUF_INIT;
  34
  35         va_start(ap, fmt);
  36         strbuf_vaddf(&v, fmt, ap);
  37         va_end(ap);
  38
  39         argv_array_push_nodup(array, strbuf_detach(&v, NULL));
  40 }
  41
  42 void argv_array_clear(struct argv_array *array)
  43 {
  44         if (array->argv != empty_argv) {
  45                 int i;
  46                 for (i = 0; i < array->argc; i++)
  47                         free((char **)array->argv[i]);
  48                 free(array->argv);
  49         }
  50         argv_array_init(array);
  51 }