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_pushv(struct argv_array *array, const char **argv)
  53 {
  54         for (; *argv; argv++)
  55                 argv_array_push(array, *argv);
  56 }
  57
  58 void argv_array_pop(struct argv_array *array)
  59 {
  60         if (!array->argc)
  61                 return;
  62         free((char *)array->argv[array->argc - 1]);
  63         array->argv[array->argc - 1] = NULL;
  64         array->argc--;
  65 }
  66
  67 void argv_array_clear(struct argv_array *array)
  68 {
  69         if (array->argv != empty_argv) {
  70                 int i;
  71                 for (i = 0; i < array->argc; i++)
  72                         free((char *)array->argv[i]);
  73                 free(array->argv);
  74         }
  75         argv_array_init(array);
  76 }
  77
  78 const char **argv_array_detach(struct argv_array *array)
  79 {
  80         if (array->argv == empty_argv)
  81                 return xcalloc(1, sizeof(const char *));
  82         else {
  83                 const char **ret = array->argv;
  84                 argv_array_init(array);
  85                 return ret;
  86         }
  87 }