git.m6w6.name Git - m6w6/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     error->c_str[str->size]= 0;
  68   }
  69   else
  70   {
  71     error->size= 0;
  72   }
  73
  74   error->next= memc->error_messages;
  75   memc->error_messages= error;
  76
  77   return error;
  78 }
  79
  80 memcached_return_t memcached_set_error_string(memcached_st *memc, memcached_return_t rc, const char *str, size_t length)
  81 {
  82   memcached_string_t tmp;
  83   tmp.c_str= str;
  84   tmp.size= length;
  85   return memcached_set_error(memc, rc, &tmp);
  86 }
  87
  88 memcached_return_t memcached_set_error(memcached_st *memc, memcached_return_t rc, memcached_string_t *str)
  89 {
  90   if (rc == MEMCACHED_SUCCESS)
  91     return MEMCACHED_SUCCESS;
  92
  93   memcached_error_st *error= _set(memc, str);
  94
  95   if (error)
  96   {
  97     error->local_errno= 0;
  98     error->rc= rc;
  99   }
 100
 101   return rc;
 102 }
 103
 104 memcached_return_t memcached_set_errno(memcached_st *memc, int local_errno, memcached_string_t *str)
 105 {
 106   memcached_error_st *error= _set(memc, str);
 107
 108   if (error)
 109   {
 110     error->local_errno= local_errno;
 111     error->rc= MEMCACHED_ERRNO;
 112   }
 113
 114   return error->rc;
 115 }
 116
 117 static void _error_print(const memcached_error_st *error)
 118 {
 119   if (! error)
 120     return;
 121
 122   if (! error->size)
 123   {
 124     fprintf(stderr, "%s\n", memcached_strerror(NULL, error->rc) );
 125   }
 126   else
 127   {
 128     fprintf(stderr, "%s %s\n", memcached_strerror(NULL, error->rc), error->c_str);
 129   }
 130
 131   _error_print(error->next);
 132 }
 133
 134 void memcached_error_print(const memcached_st *self)
 135 {
 136   if (! self)
 137     return;
 138
 139   _error_print(self->error_messages);
 140 }
 141
 142 static void _error_free(memcached_error_st *error)
 143 {
 144   if (! error)
 145     return;
 146
 147   _error_free(error->next);
 148
 149   if (error && error->root)
 150   {
 151     libmemcached_free(error->root, error);
 152   }
 153   else if (error)
 154   {
 155     free(error);
 156   }
 157 }
 158
 159 void memcached_error_free(memcached_st *self)
 160 {
 161   if (! self)
 162     return;
 163
 164   _error_free(self->error_messages);
 165 }
 166
 167 const char *memcached_last_error_message(memcached_st *memc)
 168 {
 169   if (! memc)
 170     return memcached_strerror(memc, MEMCACHED_INVALID_ARGUMENTS);
 171
 172   if (! memc->error_messages)
 173     return memcached_strerror(memc, MEMCACHED_SUCCESS);
 174
 175   if (! memc->error_messages->size)
 176   {
 177     return memcached_strerror(memc, memc->error_messages->rc);
 178   }
 179
 180   return memc->error_messages->c_str;
 181 }
 182
 183 memcached_return_t memcached_last_error(memcached_st *memc)
 184 {
 185   if (! memc)
 186     return MEMCACHED_INVALID_ARGUMENTS;
 187
 188   if (! memc->error_messages)
 189     return MEMCACHED_SUCCESS;
 190
 191   return memc->error_messages->rc;
 192 }
 193
 194 memcached_return_t memcached_last_error_errno(memcached_st *memc)
 195 {
 196   if (! memc)
 197     return MEMCACHED_INVALID_ARGUMENTS;
 198
 199   if (! memc->error_messages)
 200     return MEMCACHED_SUCCESS;
 201
 202   return memc->error_messages->local_errno;
 203 }