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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
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  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
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  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
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  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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  36  */
  37
  38 #include <libmemcached/common.h>
  39 #include <libmemcached/options.hpp>
  40
  41 #include <cassert>
  42
  43 #include <libmemcached/options/context.h>
  44
  45 const char *memcached_parse_filename(memcached_st *memc)
  46 {
  47   assert(memc);
  48   return memcached_array_string(memc->configure.filename);
  49 }
  50
  51 size_t memcached_parse_filename_length(memcached_st *memc)
  52 {
  53   return memcached_array_size(memc->configure.filename);
  54 }
  55
  56 static memcached_return_t _parse_file_options(memcached_st& self, memcached_array_st *real_name)
  57 {
  58   FILE *fp= fopen(memcached_array_string(real_name), "r");
  59   if (not fp)
  60   {
  61     memcached_string_t error_message= memcached_array_to_string(real_name);
  62     memcached_return_t rc=  memcached_set_errno(self, errno, MEMCACHED_AT, error_message);
  63     return rc;
  64   }
  65
  66   char buffer[BUFSIZ];
  67   memcached_return_t rc= MEMCACHED_INVALID_ARGUMENTS;
  68   while (fgets(buffer, sizeof(buffer), fp))
  69   {
  70     size_t length= strlen(buffer);
  71
  72     if (length == 1 and buffer[0] == '\n')
  73       continue;
  74
  75     if (memcached_failed(rc= memcached_parse_configuration(&self, buffer, length)))
  76       break;
  77   }
  78   fclose(fp);
  79
  80   return rc;
  81 }
  82
  83 memcached_return_t libmemcached_check_configuration(const char *option_string, size_t length, char *error_buffer, size_t error_buffer_size)
  84 {
  85   memcached_st memc, *memc_ptr;
  86
  87   if (error_buffer_size)
  88     error_buffer[0]= 0;
  89
  90   if (not (memc_ptr= memcached_create(&memc)))
  91     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  92
  93   memcached_return_t rc= memcached_parse_configuration(memc_ptr, option_string, length);
  94   if (memcached_failed(rc) and error_buffer and error_buffer_size)
  95   {
  96     strncpy(error_buffer, memcached_last_error_message(memc_ptr), error_buffer_size);
  97     error_buffer[length -1]= 0;
  98   }
  99
 100   bool has_filename= memcached_behavior_get(memc_ptr, MEMCACHED_BEHAVIOR_LOAD_FROM_FILE);
 101   if (memcached_success(rc) and has_filename)
 102   {
 103     assert(memcached_parse_filename(memc_ptr));
 104     assert(memcached_parse_filename_length(memc_ptr));
 105     memcached_string_t filename= memcached_array_to_string(memc_ptr->configure.filename);
 106     rc= _parse_file_options(*memc_ptr, memc_ptr->configure.filename);
 107
 108     if (memcached_failed(rc) and error_buffer && error_buffer_size)
 109     {
 110       strncpy(error_buffer, memcached_last_error_message(memc_ptr), error_buffer_size);
 111     }
 112   }
 113
 114   memcached_free(memc_ptr);
 115
 116   return rc;
 117 }
 118
 119 memcached_return_t memcached_parse_configuration(memcached_st *self, char const *option_string, size_t length)
 120 {
 121   WATCHPOINT_ASSERT(self);
 122   if (not self)
 123   {
 124     return MEMCACHED_INVALID_ARGUMENTS;
 125   }
 126
 127   memcached_return_t rc;
 128   Context context(option_string, length, self, rc);
 129
 130   context.start();
 131
 132   return rc;
 133 }
 134
 135 void memcached_set_configuration_file(memcached_st *self, const char *filename, size_t filename_length)
 136 {
 137   assert(filename);
 138   assert(filename_length);
 139   memcached_array_free(self->configure.filename);
 140   self->configure.filename= memcached_strcpy(self, filename, filename_length);
 141 }
 142
 143 memcached_return_t memcached_parse_configure_file(memcached_st& self, const char *filename, size_t length)
 144 {
 145   if (not filename)
 146   {
 147     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 148   }
 149
 150   WATCHPOINT_ASSERT(self);
 151   if (not length)
 152   {
 153     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 154   }
 155
 156   memcached_array_st *tmp_array= memcached_strcpy(&self, filename, length);
 157
 158   if (not tmp_array)
 159   {
 160     return memcached_set_error(self, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
 161   }
 162
 163   memcached_return_t rc= memcached_parse_configure_file(self, *tmp_array);
 164   memcached_array_free(tmp_array);
 165
 166   return rc;
 167 }
 168
 169 memcached_return_t memcached_parse_configure_file(memcached_st& self, memcached_array_st& filename)
 170 {
 171   WATCHPOINT_ASSERT(memcached_array_size(&filename));
 172   if (not memcached_array_size(&filename))
 173   {
 174     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT);
 175   }
 176
 177   return _parse_file_options(self, &filename);
 178 }