RSM/3rdparty/asn1codec/e2ap_engine/asn_SET_OF.c

   1
   2 /*-
   3  * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
   4  * Redistribution and modifications are permitted subject to BSD license.
   5  */
   6 #include <asn_internal.h>
   7 #include <asn_SET_OF.h>
   8 #include <errno.h>
   9
  10 /*
  11  * Add another element into the set.
  12  */
  13 int
  14 asn_set_add(void *asn_set_of_x, void *ptr) {
  15         asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
  16
  17         if(as == 0 || ptr == 0) {
  18                 errno = EINVAL;         /* Invalid arguments */
  19                 return -1;
  20         }
  21
  22         /*
  23          * Make sure there's enough space to insert an element.
  24          */
  25         if(as->count == as->size) {
  26                 int _newsize = as->size ? (as->size << 1) : 4;
  27                 void *_new_arr;
  28                 _new_arr = REALLOC(as->array, _newsize * sizeof(as->array[0]));
  29                 if(_new_arr) {
  30                         as->array = (void **)_new_arr;
  31                         as->size = _newsize;
  32                 } else {
  33                         /* ENOMEM */
  34                         return -1;
  35                 }
  36         }
  37
  38         as->array[as->count++] = ptr;
  39
  40         return 0;
  41 }
  42
  43 void
  44 asn_set_del(void *asn_set_of_x, int number, int _do_free) {
  45         asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
  46
  47         if(as) {
  48                 void *ptr;
  49                 if(number < 0 || number >= as->count)
  50                         return;
  51
  52                 if(_do_free && as->free) {
  53                         ptr = as->array[number];
  54                 } else {
  55                         ptr = 0;
  56                 }
  57
  58                 as->array[number] = as->array[--as->count];
  59
  60                 /*
  61                  * Invoke the third-party function only when the state
  62                  * of the parent structure is consistent.
  63                  */
  64                 if(ptr) as->free(ptr);
  65         }
  66 }
  67
  68 /*
  69  * Free the contents of the set, do not free the set itself.
  70  */
  71 void
  72 asn_set_empty(void *asn_set_of_x) {
  73         asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
  74
  75         if(as) {
  76                 if(as->array) {
  77                         if(as->free) {
  78                                 while(as->count--)
  79                                         as->free(as->array[as->count]);
  80                         }
  81                         FREEMEM(as->array);
  82                         as->array = 0;
  83                 }
  84                 as->count = 0;
  85                 as->size = 0;
  86         }
  87
  88 }
  89