git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/error.c

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  LibMemcached
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include "libmemcached/common.h"
  39
  40 struct memcached_error_st
  41 {
  42   memcached_st *root;
  43   struct memcached_error_st *next;
  44   memcached_return_t rc;
  45   int local_errno;
  46   size_t size;
  47   char c_str[];
  48 };
  49
  50 static memcached_error_st *_set(memcached_st *memc, memcached_string_t *str)
  51 {
  52   if (! memc)
  53     return NULL;
  54
  55   memcached_error_st *error;
  56   error= (struct memcached_error_st *)libmemcached_malloc(memc, sizeof(struct memcached_error_st) +(str ? str->size :0) +1);
  57
  58   if (! error)
  59     return NULL;
  60
  61   error->root= memc;
  62
  63   if (str)
  64   {
  65     error->size= str->size;
  66     memcpy(error->c_str, str->c_str, str->size);
  67   }
  68   error->c_str[(str ? str->size :0)]= 0;
  69
  70   error->next= memc->error_messages;
  71   memc->error_messages= error;
  72
  73   return error;
  74 }
  75
  76 memcached_return_t memcached_set_error(memcached_st *memc, memcached_return_t rc, memcached_string_t *str)
  77 {
  78   if (rc == MEMCACHED_SUCCESS)
  79     return MEMCACHED_SUCCESS;
  80
  81   memcached_error_st *error= _set(memc, str);
  82
  83   if (error)
  84   {
  85     error->local_errno= 0;
  86     error->rc= rc;
  87   }
  88
  89   return rc;
  90 }
  91
  92 memcached_return_t memcached_set_errno(memcached_st *memc, int local_errno, memcached_string_t *str)
  93 {
  94   memcached_error_st *error= _set(memc, str);
  95
  96   if (error)
  97   {
  98     error->local_errno= local_errno;
  99     error->rc= MEMCACHED_ERRNO;
 100   }
 101
 102   return error->rc;
 103 }
 104
 105 static void _error_free(memcached_error_st *error)
 106 {
 107   if (! error)
 108     return;
 109
 110   _error_free(error->next);
 111
 112   if (error && error->root)
 113   {
 114     libmemcached_free(error->root, error);
 115   }
 116   else if (error)
 117   {
 118     free(error);
 119   }
 120 }
 121
 122 void memcached_error_free(memcached_st *self)
 123 {
 124   if (! self)
 125     return;
 126
 127   _error_free(self->error_messages);
 128 }
 129
 130 const char *memcached_last_error_message(memcached_st *memc)
 131 {
 132   if (! memc)
 133     return memcached_strerror(memc, MEMCACHED_INVALID_ARGUMENTS);
 134
 135   if (! memc->error_messages)
 136     return memcached_strerror(memc, MEMCACHED_SUCCESS);
 137
 138   if (! memc->error_messages->c_str)
 139   {
 140     return memcached_strerror(memc, memc->error_messages->rc);
 141   }
 142
 143   return memc->error_messages->c_str;
 144 }
 145
 146 memcached_return_t memcached_last_error(memcached_st *memc)
 147 {
 148   if (! memc)
 149     return MEMCACHED_INVALID_ARGUMENTS;
 150
 151   if (! memc->error_messages)
 152     return MEMCACHED_SUCCESS;
 153
 154   return memc->error_messages->rc;
 155 }
 156
 157 memcached_return_t memcached_last_error_errno(memcached_st *memc)
 158 {
 159   if (! memc)
 160     return MEMCACHED_INVALID_ARGUMENTS;
 161
 162   if (! memc->error_messages)
 163     return MEMCACHED_SUCCESS;
 164
 165   return memc->error_messages->local_errno;
 166 }