3 memcached_return
memcached_string_check(memcached_string_st
*string
, size_t need
)
5 if (need
&& need
> (size_t)(string
->current_size
- (size_t)(string
->end
- string
->string
)))
7 size_t current_offset
= string
->end
- string
->string
;
12 /* This is the block multiplier. To keep it larger and surive division errors we must round it up */
13 adjust
= (need
- (size_t)(string
->current_size
- (size_t)(string
->end
- string
->string
))) / string
->block_size
;
16 new_size
= sizeof(char) * (size_t)((adjust
* string
->block_size
) + string
->current_size
);
17 /* Test for overflow */
19 return MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
21 new_value
= (char *)realloc(string
->string
, new_size
);
23 if (new_value
== NULL
)
24 return MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
26 string
->string
= new_value
;
27 string
->end
= string
->string
+ current_offset
;
29 string
->current_size
+= (string
->block_size
* adjust
);
31 /* We zero the block structure we just realloced */
32 memset((string
->string
+ current_offset
), 0,
33 sizeof(char) * string
->block_size
);
36 return MEMCACHED_SUCCESS
;
39 memcached_string_st
*memcached_string_create(memcached_st
*ptr
, memcached_string_st
*string
, size_t initial_size
)
43 /* Saving malloc calls :) */
46 memset(string
, 0, sizeof(memcached_string_st
));
47 string
->is_allocated
= MEMCACHED_NOT_ALLOCATED
;
51 string
= (memcached_string_st
*)malloc(sizeof(memcached_string_st
));
54 memset(string
, 0, sizeof(memcached_string_st
));
55 string
->is_allocated
= MEMCACHED_ALLOCATED
;
57 string
->block_size
= MEMCACHED_BLOCK_SIZE
;
60 rc
= memcached_string_check(string
, initial_size
);
61 if (rc
!= MEMCACHED_SUCCESS
)
67 WATCHPOINT_ASSERT(string
->string
== string
->end
);
72 memcached_return
memcached_string_append_character(memcached_string_st
*string
,
77 rc
= memcached_string_check(string
, 1);
79 if (rc
!= MEMCACHED_SUCCESS
)
85 return MEMCACHED_SUCCESS
;
88 memcached_return
memcached_string_append(memcached_string_st
*string
,
89 char *value
, size_t length
)
93 rc
= memcached_string_check(string
, length
);
95 if (rc
!= MEMCACHED_SUCCESS
)
98 WATCHPOINT_ASSERT(length
<= string
->current_size
);
99 WATCHPOINT_ASSERT(string
->string
);
100 WATCHPOINT_ASSERT(string
->end
>= string
->string
);
102 memcpy(string
->end
, value
, length
);
103 string
->end
+= length
;
105 return MEMCACHED_SUCCESS
;
108 size_t memcached_string_backspace(memcached_string_st
*string
, size_t remove
)
110 if (string
->end
- string
->string
> remove
)
114 difference
= string
->end
- string
->string
;
115 string
->end
= string
->string
;
119 string
->end
-= remove
;
124 char *memcached_string_c_copy(memcached_string_st
*string
)
127 c_ptr
= (char *)malloc(memcached_string_length(string
) * sizeof(char));
131 memcpy(c_ptr
, memcached_string_value(string
), memcached_string_length(string
));
136 memcached_return
memcached_string_reset(memcached_string_st
*string
)
138 string
->end
= string
->string
;
140 return MEMCACHED_SUCCESS
;
143 void memcached_string_free(memcached_string_st
*string
)
146 free(string
->string
);
147 if (string
->is_allocated
== MEMCACHED_ALLOCATED
)