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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.
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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
  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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  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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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 "common.h"
  39
  40 #include <libmemcached/options/parser.h>
  41 #include <libmemcached/options/scanner.h>
  42
  43 int libmemcached_parse(type_st *, yyscan_t *);
  44
  45 const char *memcached_parse_filename(memcached_st *memc)
  46 {
  47   return memcached_array_string(memc->configure.filename);
  48 }
  49
  50 size_t memcached_parse_filename_length(memcached_st *memc)
  51 {
  52   return memcached_array_size(memc->configure.filename);
  53 }
  54
  55 static memcached_return_t _parse_file_options(memcached_st *self, memcached_string_t *filename)
  56 {
  57   FILE *fp= fopen(filename->c_str, "r");
  58   if (! fp)
  59     return memcached_set_errno(self, errno, NULL);
  60
  61   char buffer[BUFSIZ];
  62   memcached_return_t rc= MEMCACHED_INVALID_ARGUMENTS;
  63   while (fgets(buffer, sizeof(buffer), fp))
  64   {
  65     size_t length= strlen(buffer);
  66
  67     if (length == 1 and buffer[0] == '\n')
  68       continue;
  69
  70     rc= memcached_parse_configuration(self, buffer, length);
  71     if (rc != MEMCACHED_SUCCESS)
  72       break;
  73   }
  74   fclose(fp);
  75
  76   return rc;
  77 }
  78
  79 memcached_return_t libmemcached_check_configuration(const char *option_string, size_t length, const char *error_buffer, size_t error_buffer_size)
  80 {
  81   memcached_st memc, *memc_ptr;
  82
  83   if (! (memc_ptr= memcached_create(&memc)))
  84     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  85
  86   memcached_return_t rc= memcached_parse_configuration(memc_ptr, option_string, length);
  87   if (rc != MEMCACHED_SUCCESS && error_buffer && error_buffer_size)
  88   {
  89     strncpy(error_buffer, error_buffer_size, memcached_last_error_message(memc_ptr));
  90   }
  91
  92   if (rc== MEMCACHED_SUCCESS && memcached_behavior_get(memc_ptr, MEMCACHED_BEHAVIOR_LOAD_FROM_FILE))
  93   {
  94     memcached_string_t filename= memcached_array_to_string(memc_ptr->configure.filename);
  95     rc= _parse_file_options(memc_ptr, &filename);
  96
  97     if (rc != MEMCACHED_SUCCESS && error_buffer && error_buffer_size)
  98     {
  99       strncpy(error_buffer, error_buffer_size, memcached_last_error_message(memc_ptr));
 100     }
 101   }
 102
 103   memcached_free(memc_ptr);
 104
 105   return rc;
 106 }
 107
 108 memcached_return_t memcached_parse_configuration(memcached_st *self, char const *option_string, size_t length)
 109 {
 110   type_st pp;
 111   memset(&pp, 0, sizeof(type_st));
 112
 113   WATCHPOINT_ASSERT(self);
 114   if (! self)
 115     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, NULL);
 116
 117   pp.buf= option_string;
 118   pp.memc= self;
 119   pp.length= length;
 120   libmemcached_lex_init(&pp.yyscanner);
 121   libmemcached_set_extra(&pp, pp.yyscanner);
 122   bool success= libmemcached_parse(&pp, pp.yyscanner)  == 0;
 123   libmemcached_lex_destroy(pp.yyscanner);
 124
 125   if (not success)
 126     return memcached_set_error(self, MEMCACHED_PARSE_ERROR, NULL);
 127
 128   return MEMCACHED_SUCCESS;
 129 }
 130
 131 void memcached_set_configuration_file(memcached_st *self, const char *filename, size_t filename_length)
 132 {
 133   memcached_array_free(self->configure.filename);
 134   self->configure.filename= memcached_strcpy(self, filename, filename_length);
 135 }
 136
 137 memcached_return_t memcached_parse_configure_file(memcached_st *self, const char *filename, size_t filename_length)
 138 {
 139   if (! self)
 140     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, NULL);
 141
 142   if (! filename || filename_length == 0)
 143     return memcached_set_error(self, MEMCACHED_INVALID_ARGUMENTS, NULL);
 144
 145   memcached_string_t tmp;
 146   tmp.c_str= filename;
 147   tmp.size= filename_length;
 148
 149   return _parse_file_options(self, &tmp);
 150 }