lib/gnutls_str_array.h

   1 /*
   2  * Copyright (C) 2011-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * The GnuTLS is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #ifndef GNUTLS_STR_ARRAY_H
  24 #define GNUTLS_STR_ARRAY_H
  25
  26 #include <gnutls_int.h>
  27 #include <gnutls_errors.h>
  28
  29 /* Functionality to allow an array of strings. Strings
  30  * are allowed to be added to the list and matched against it.
  31  */
  32
  33 typedef struct gnutls_str_array_st
  34 {
  35   char* str;
  36   unsigned int len;
  37   struct gnutls_str_array_st* next;
  38 } *gnutls_str_array_t;
  39
  40 inline static void _gnutls_str_array_init(gnutls_str_array_t* head)
  41 {
  42   *head = NULL;
  43 }
  44
  45 inline static void _gnutls_str_array_clear (gnutls_str_array_t *head)
  46 {
  47   gnutls_str_array_t prev, array = *head;
  48
  49   while(array != NULL)
  50     {
  51       prev = array;
  52       array = prev->next;
  53       gnutls_free(prev);
  54     }
  55   *head = NULL;
  56 }
  57
  58 inline static int _gnutls_str_array_match (gnutls_str_array_t head, const char* str)
  59 {
  60   gnutls_str_array_t array = head;
  61
  62   while(array != NULL)
  63     {
  64       if (strcmp(array->str, str) == 0) return 1;
  65       array = array->next;
  66     }
  67
  68   return 0;
  69 }
  70
  71 inline static void append(gnutls_str_array_t array, const char* str, int len)
  72 {
  73   array->str = ((char*)array) + sizeof(struct gnutls_str_array_st);
  74   memcpy(array->str, str, len);
  75   array->str[len] = 0;
  76   array->len = len;
  77   array->next = NULL;
  78 }
  79
  80 inline static int _gnutls_str_array_append (gnutls_str_array_t* head, const char* str, int len)
  81 {
  82   gnutls_str_array_t prev, array;
  83   if (*head == NULL)
  84     {
  85       *head = gnutls_malloc(len + 1 + sizeof(struct gnutls_str_array_st));
  86       if (*head == NULL)
  87         return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
  88
  89       array = *head;
  90       append(array, str, len);
  91     }
  92   else
  93     {
  94       array = *head;
  95       prev = array;
  96       while(array != NULL)
  97         {
  98           prev = array;
  99           array = prev->next;
 100         }
 101       prev->next = gnutls_malloc(len + 1 + sizeof(struct gnutls_str_array_st));
 102
 103       array = prev->next;
 104
 105       if (array == NULL)
 106         return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
 107
 108       append(array, str, len);
 109     }
 110
 111   return 0;
 112 }
 113
 114 #endif