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   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
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   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
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  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  36  */
  37
  38 #include <libmemcached/common.h>
  39 #include <libmemcached/options.hpp>
  40
  41 #include <libmemcached/csl/context.h>
  42
  43 const char *memcached_parse_filename(memcached_st *memc)
  44 {
  45   assert_msg(memc, "Invalid memcached_st");
  46   return memcached_array_string(memc->configure.filename);
  47 }
  48
  49 size_t memcached_parse_filename_length(memcached_st *memc)
  50 {
  51   return memcached_array_size(memc->configure.filename);
  52 }
  53
  54 static memcached_return_t _parse_file_options(memcached_st& self, memcached_array_st *real_name)
  55 {
  56   FILE *fp= fopen(memcached_array_string(real_name), "r");
  57   if (not fp)
  58   {
  59     memcached_string_t error_message= memcached_array_to_string(real_name);
  60     memcached_return_t rc=  memcached_set_errno(self, errno, MEMCACHED_AT, error_message);
  61     return rc;
  62   }
  63
  64   char buffer[BUFSIZ];
  65   memcached_return_t rc= MEMCACHED_INVALID_ARGUMENTS;
  66   while (fgets(buffer, sizeof(buffer), fp))
  67   {
  68     size_t length= strlen(buffer);
  69
  70     if (length == 1 and buffer[0] == '\n')
  71       continue;
  72
  73     if (memcached_failed(rc= memcached_parse_configuration(&self, buffer, length)))
  74       break;
  75   }
  76   fclose(fp);
  77
  78   return rc;
  79 }
  80
  81 memcached_return_t libmemcached_check_configuration(const char *option_string, size_t length, char *error_buffer, size_t error_buffer_size)
  82 {
  83   memcached_st memc, *memc_ptr;
  84
  85   if (option_string == NULL or length == 0)
  86   {
  87     return MEMCACHED_INVALID_ARGUMENTS;
  88   }
  89
  90   if (error_buffer and error_buffer_size)
  91   {
  92     error_buffer[0]= 0;
  93   }
  94
  95   if (not (memc_ptr= memcached_create(&memc)))
  96   {
  97     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  98   }
  99
 100   memcached_return_t rc= memcached_parse_configuration(memc_ptr, option_string, length);
 101   if (memcached_failed(rc) and error_buffer and error_buffer_size)
 102   {
 103     strncpy(error_buffer, memcached_last_error_message(memc_ptr), error_buffer_size);
 104     error_buffer[error_buffer_size -1]= 0;
 105   }
 106
 107   bool has_filename= memcached_behavior_get(memc_ptr, MEMCACHED_BEHAVIOR_LOAD_FROM_FILE);
 108   if (memcached_success(rc) and has_filename)
 109   {
 110     assert_msg(memcached_parse_filename(memc_ptr), "Invalid configuration file");
 111     assert_msg(memcached_parse_filename_length(memc_ptr), "Invalid configuration file");
 112     rc= _parse_file_options(*memc_ptr, memc_ptr->configure.filename);
 113
 114     if (memcached_failed(rc) and error_buffer and error_buffer_size)
 115     {
 116       strncpy(error_buffer, memcached_last_error_message(memc_ptr), error_buffer_size);
 117       error_buffer[error_buffer_size -1]= 0;
 118     }
 119   }
 120
 121   memcached_free(memc_ptr);
 122
 123   return rc;
 124 }
 125
 126 memcached_return_t memcached_parse_configuration(memcached_st *self, char const *option_string, size_t length)
 127 {
 128   WATCHPOINT_ASSERT(self);
 129   if (not self)
 130   {
 131     return MEMCACHED_INVALID_ARGUMENTS;
 132   }
 133
 134   memcached_return_t rc;
 135   Context context(option_string, length, self, rc);
 136
 137   context.start();
 138
 139   return rc;
 140 }
 141
 142 void memcached_set_configuration_file(memcached_st *self, const char *filename, size_t filename_length)
 143 {
 144   assert_msg(filename, "Invalid filename");
 145   assert_msg(filename_length, "Invalid filename_length");
 146   memcached_array_free(self->configure.filename);
 147   self->configure.filename= memcached_strcpy(self, filename, filename_length);
 148 }
 149
 150 memcached_return_t memcached_parse_configure_file(memcached_st& self, const char *filename, size_t length)
 151 {
 152   if (not filename)
 153   {
 154     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 155   }
 156
 157   WATCHPOINT_ASSERT(self);
 158   if (not length)
 159   {
 160     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 161   }
 162
 163   memcached_array_st *tmp_array= memcached_strcpy(&self, filename, length);
 164
 165   if (not tmp_array)
 166   {
 167     return memcached_set_error(self, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
 168   }
 169
 170   memcached_return_t rc= memcached_parse_configure_file(self, *tmp_array);
 171   memcached_array_free(tmp_array);
 172
 173   return rc;
 174 }
 175
 176 memcached_return_t memcached_parse_configure_file(memcached_st& self, memcached_array_st& filename)
 177 {
 178   WATCHPOINT_ASSERT(memcached_array_size(&filename));
 179   if (not memcached_array_size(&filename))
 180   {
 181     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 182   }
 183
 184   return _parse_file_options(self, &filename);
 185 }