git.m6w6.name Git - m6w6/libmemcached/blob - lib/memcached_string.c

   1 #include "common.h"
   2
   3 memcached_return memcached_string_check(memcached_string_st *string, size_t need)
   4 {
   5   if (need > (size_t)(string->current_size - (size_t)(string->end - string->string)))
   6   {
   7     size_t current_offset= string->end - string->string;
   8     char *new_value;
   9
  10     new_value= (char *)realloc(string->string, sizeof(char) * string->block_size);
  11
  12     if (!new_value)
  13       return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  14
  15     string->string= new_value;
  16     string->end= string->string + current_offset;
  17
  18     string->current_size+= string->block_size;
  19
  20     /* We zero the block structure we just realloced */
  21     memset((string->string + string->current_size) - string->block_size , 0,
  22            sizeof(char) * string->block_size);
  23   }
  24
  25   return MEMCACHED_SUCCESS;
  26 }
  27
  28 memcached_string_st *memcached_string_create(memcached_st *ptr, size_t initial_size)
  29 {
  30   memcached_string_st *string;
  31
  32   /* Saving malloc calls :) */
  33   string= (memcached_string_st *)malloc(sizeof(memcached_string_st) + (sizeof(char) * initial_size));
  34   if (!string)
  35     return NULL;
  36   memset(string, 0, sizeof(memcached_string_st));
  37   string->block_size= initial_size;
  38   memcached_string_check(string, initial_size);
  39
  40   return string;
  41 }
  42
  43 memcached_return memcached_string_append_character(memcached_st *ptr,
  44                                                    memcached_string_st *string,
  45                                                    char character)
  46 {
  47   memcached_string_check(string, 1);
  48   *string->end= ' ';
  49   string->end++;
  50
  51   return MEMCACHED_SUCCESS;
  52 }
  53
  54 memcached_return memcached_string_append(memcached_st *ptr, memcached_string_st *string,
  55                                          char *value, size_t length)
  56 {
  57   memcached_string_check(string, length);
  58   memcpy(string->end, value, length);
  59   string->end+= length;
  60
  61   return MEMCACHED_SUCCESS;
  62 }
  63
  64 #ifdef CRAP
  65 size_t memcached_string_length(memcached_st *ptr, memcached_string_st *string)
  66 {
  67   return (size_t)(string->end - string->string);
  68 }
  69
  70 size_t memcached_string_size(memcached_st *ptr, memcached_string_st *string)
  71 {
  72   return string->current_size;
  73 }
  74 #endif
  75
  76 size_t memcached_string_backspace(memcached_st *ptr, memcached_string_st *string, size_t remove)
  77 {
  78   if (string->end - string->string  > remove)
  79   {
  80     size_t difference;
  81
  82     difference= string->end - string->string;
  83     string->end= string->string;
  84
  85     return difference;
  86   }
  87   string->end-= remove;
  88
  89   return remove;
  90 }
  91
  92 memcached_return memcached_string_reset(memcached_st *ptr, memcached_string_st *string)
  93 {
  94   string->end= string->string;
  95
  96   return MEMCACHED_SUCCESS;
  97 }
  98
  99 void memcached_string_free(memcached_st *ptr, memcached_string_st *string)
 100 {
 101   free(string->string);
 102   free(string);
 103 }