git.m6w6.name Git - m6w6/libmemcached/blob - clients/generator.cc

   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary:
   9  *
  10  */
  11
  12 #include <config.h>
  13
  14 #include <stdint.h>
  15
  16 #include <cstdio>
  17 #include <cstdlib>
  18 #include <cstring>
  19 #include <iostream>
  20 #include <unistd.h>
  21
  22 #include "generator.h"
  23
  24 /* Use this for string generation */
  25 static const char ALPHANUMERICS[]=
  26   "0123456789ABCDEFGHIJKLMNOPQRSTWXYZabcdefghijklmnopqrstuvwxyz";
  27
  28 #define ALPHANUMERICS_SIZE (sizeof(ALPHANUMERICS)-1)
  29
  30 static size_t get_alpha_num(void)
  31 {
  32   return (size_t)random() % ALPHANUMERICS_SIZE;
  33 }
  34
  35 static void get_random_string(char *buffer, size_t size)
  36 {
  37   char *buffer_ptr= buffer;
  38
  39   while (--size)
  40     *buffer_ptr++= ALPHANUMERICS[get_alpha_num()];
  41   *buffer_ptr++= ALPHANUMERICS[get_alpha_num()];
  42 }
  43
  44 void pairs_free(pairs_st *pairs)
  45 {
  46   if (pairs == NULL)
  47     return;
  48
  49   /* We free until we hit the null pair we stores during creation */
  50   for (uint32_t x= 0; pairs[x].key; x++)
  51   {
  52     free(pairs[x].key);
  53     if (pairs[x].value)
  54       free(pairs[x].value);
  55   }
  56
  57   free(pairs);
  58 }
  59
  60 pairs_st *pairs_generate(uint64_t number_of, size_t value_length)
  61 {
  62   pairs_st *pairs= (pairs_st*)calloc((size_t)number_of + 1, sizeof(pairs_st));
  63
  64   if (pairs == NULL)
  65   {
  66     goto error;
  67   }
  68
  69   for (uint64_t x= 0; x < number_of; x++)
  70   {
  71     pairs[x].key= (char *)calloc(100, sizeof(char));
  72
  73     if (pairs[x].key == NULL)
  74       goto error;
  75
  76     get_random_string(pairs[x].key, 100);
  77     pairs[x].key_length= 100;
  78
  79     if (value_length)
  80     {
  81       pairs[x].value= (char *)calloc(value_length, sizeof(char));
  82
  83       if (pairs[x].value == NULL)
  84         goto error;
  85
  86       get_random_string(pairs[x].value, value_length);
  87       pairs[x].value_length= value_length;
  88     }
  89     else
  90     {
  91       pairs[x].value= NULL;
  92       pairs[x].value_length= 0;
  93     }
  94   }
  95
  96   return pairs;
  97 error:
  98   std::cerr << "Memory Allocation failure in pairs_generate." << std::endl;
  99   exit(EXIT_SUCCESS);
 100 }