argv-array.c

   1 #include "cache.h"
   2 #include "argv-array.h"
   3 #include "strbuf.h"
   4
   5 const char *empty_argv[] = { NULL };
   6
   7 void argv_array_init(struct argv_array *array)
   8 {
   9         array->argv = empty_argv;
  10         array->argc = 0;
  11         array->alloc = 0;
  12 }
  13
  14 static void argv_array_push_nodup(struct argv_array *array, const char *value)
  15 {
  16         if (array->argv == empty_argv)
  17                 array->argv = NULL;
  18
  19         ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
  20         array->argv[array->argc++] = value;
  21         array->argv[array->argc] = NULL;
  22 }
  23
  24 void argv_array_push(struct argv_array *array, const char *value)
  25 {
  26         argv_array_push_nodup(array, xstrdup(value));
  27 }
  28
  29 void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
  30 {
  31         va_list ap;
  32         struct strbuf v = STRBUF_INIT;
  33
  34         va_start(ap, fmt);
  35         strbuf_vaddf(&v, fmt, ap);
  36         va_end(ap);
  37
  38         argv_array_push_nodup(array, strbuf_detach(&v, NULL));
  39 }
  40
  41 void argv_array_pushl(struct argv_array *array, ...)
  42 {
  43         va_list ap;
  44         const char *arg;
  45
  46         va_start(ap, array);
  47         while((arg = va_arg(ap, const char *)))
  48                 argv_array_push(array, arg);
  49         va_end(ap);
  50 }
  51
  52 void argv_array_pop(struct argv_array *array)
  53 {
  54         if (!array->argc)
  55                 return;
  56         free((char *)array->argv[array->argc - 1]);
  57         array->argv[array->argc - 1] = NULL;
  58         array->argc--;
  59 }
  60
  61 void argv_array_clear(struct argv_array *array)
  62 {
  63         if (array->argv != empty_argv) {
  64                 int i;
  65                 for (i = 0; i < array->argc; i++)
  66                         free((char *)array->argv[i]);
  67                 free(array->argv);
  68         }
  69         argv_array_init(array);
  70 }
  71
  72 const char **argv_array_detach(struct argv_array *array, int *argc)
  73 {
  74         const char **argv =
  75                 array->argv == empty_argv || array->argc == 0 ? NULL : array->argv;
  76         if (argc)
  77                 *argc = array->argc;
  78         argv_array_init(array);
  79         return argv;
  80 }
  81
  82 void argv_array_free_detached(const char **argv)
  83 {
  84         if (argv) {
  85                 int i;
  86                 for (i = 0; argv[i]; i++)
  87                         free((char **)argv[i]);
  88                 free(argv);
  89         }
  90 }