catdup.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of the catdup() function
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "common.h"
  28 #include "catdup.h"
  29
  30 char * catdup(const char * s1, const char * s2)
  31 {
  32   char * buffer;
  33   size_t s1_len, s2_len;
  34
  35   ASSERT(s1 != NULL && s2 != NULL);
  36
  37   s1_len = strlen(s1);
  38   s2_len = strlen(s2);
  39
  40   buffer = malloc(s1_len + s2_len + 1);
  41   if (buffer == NULL)
  42   {
  43     log_error("malloc() failed.");
  44     return NULL;
  45   }
  46
  47   memcpy(buffer, s1, s1_len);
  48   memcpy(buffer + s1_len, s2, s2_len);
  49   buffer[s1_len + s2_len] = 0;
  50
  51   return buffer;
  52 }
  53
  54 char * catdup3(const char * s1, const char * s2, const char * s3)
  55 {
  56   char * buffer;
  57   size_t s1_len, s2_len, s3_len;
  58
  59   ASSERT(s1 != NULL && s2 != NULL && s3 != NULL);
  60
  61   s1_len = strlen(s1);
  62   s2_len = strlen(s2);
  63   s3_len = strlen(s3);
  64
  65   buffer = malloc(s1_len + s2_len + s3_len + 1);
  66   if (buffer == NULL)
  67   {
  68     log_error("malloc() failed.");
  69     return NULL;
  70   }
  71
  72   memcpy(buffer, s1, s1_len);
  73   memcpy(buffer + s1_len, s2, s2_len);
  74   memcpy(buffer + s1_len + s2_len, s3, s3_len);
  75   buffer[s1_len + s2_len + s3_len] = 0;
  76
  77   return buffer;
  78 }
  79
  80 char * catdup4(const char * s1, const char * s2, const char * s3, const char * s4)
  81 {
  82   char * buffer;
  83   size_t s1_len, s2_len, s3_len, s4_len;
  84
  85   ASSERT(s1 != NULL && s2 != NULL && s3 != NULL && s4 != NULL);
  86
  87   s1_len = strlen(s1);
  88   s2_len = strlen(s2);
  89   s3_len = strlen(s3);
  90   s4_len = strlen(s4);
  91
  92   buffer = malloc(s1_len + s2_len + s3_len + s4_len + 1);
  93   if (buffer == NULL)
  94   {
  95     log_error("malloc() failed.");
  96     return NULL;
  97   }
  98
  99   memcpy(buffer, s1, s1_len);
 100   memcpy(buffer + s1_len, s2, s2_len);
 101   memcpy(buffer + s1_len + s2_len, s3, s3_len);
 102   memcpy(buffer + s1_len + s2_len + s3_len, s4, s4_len);
 103   buffer[s1_len + s2_len + s3_len + s4_len] = 0;
 104
 105   return buffer;
 106 }