1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
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39 #include <libmemcached/common.h>
41 inline static memcached_return_t
_string_check(memcached_string_st
*string
, size_t need
)
43 if (need
&& need
> (size_t)(string
->current_size
- (size_t)(string
->end
- string
->string
)))
45 size_t current_offset
= (size_t) (string
->end
- string
->string
);
50 /* This is the block multiplier. To keep it larger and surive division errors we must round it up */
51 adjust
= (need
- (size_t)(string
->current_size
- (size_t)(string
->end
- string
->string
))) / MEMCACHED_BLOCK_SIZE
;
54 new_size
= sizeof(char) * (size_t)((adjust
* MEMCACHED_BLOCK_SIZE
) + string
->current_size
);
55 /* Test for overflow */
57 return MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
59 new_value
= static_cast<char *>(libmemcached_realloc(string
->root
, string
->string
, new_size
));
61 if (new_value
== NULL
)
63 return MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
66 string
->string
= new_value
;
67 string
->end
= string
->string
+ current_offset
;
69 string
->current_size
+= (MEMCACHED_BLOCK_SIZE
* adjust
);
72 return MEMCACHED_SUCCESS
;
75 static inline void _init_string(memcached_string_st
*self
)
77 self
->current_size
= 0;
78 self
->end
= self
->string
= NULL
;
81 memcached_string_st
*memcached_string_create(const memcached_st
*memc
, memcached_string_st
*self
, size_t initial_size
)
83 memcached_return_t rc
;
85 WATCHPOINT_ASSERT(memc
);
87 /* Saving malloc calls :) */
90 WATCHPOINT_ASSERT(self
->options
.is_initialized
== false);
92 self
->options
.is_allocated
= false;
96 self
= static_cast<memcached_string_st
*>(libmemcached_malloc(memc
, sizeof(memcached_string_st
)));
103 self
->options
.is_allocated
= true;
105 self
->root
= const_cast<memcached_st
*>(memc
);
109 rc
= _string_check(self
, initial_size
);
110 if (rc
!= MEMCACHED_SUCCESS
)
112 if (rc
== MEMCACHED_MEMORY_ALLOCATION_FAILURE
)
114 memcached_set_errno(self
->root
, errno
, NULL
);
116 libmemcached_free(memc
, self
);
121 self
->options
.is_initialized
= true;
123 WATCHPOINT_ASSERT(self
->string
== self
->end
);
128 memcached_return_t
memcached_string_append_character(memcached_string_st
*string
,
131 memcached_return_t rc
;
133 rc
= _string_check(string
, 1);
135 if (rc
!= MEMCACHED_SUCCESS
)
140 *string
->end
= character
;
143 return MEMCACHED_SUCCESS
;
146 memcached_return_t
memcached_string_append(memcached_string_st
*string
,
147 const char *value
, size_t length
)
149 memcached_return_t rc
;
151 rc
= _string_check(string
, length
);
153 if (rc
!= MEMCACHED_SUCCESS
)
158 WATCHPOINT_ASSERT(length
<= string
->current_size
);
159 WATCHPOINT_ASSERT(string
->string
);
160 WATCHPOINT_ASSERT(string
->end
>= string
->string
);
162 memcpy(string
->end
, value
, length
);
163 string
->end
+= length
;
165 return MEMCACHED_SUCCESS
;
168 char *memcached_string_c_copy(memcached_string_st
*string
)
172 if (memcached_string_length(string
) == 0)
175 c_ptr
= static_cast<char *>(libmemcached_malloc(string
->root
, (memcached_string_length(string
)+1) * sizeof(char)));
180 memcpy(c_ptr
, memcached_string_value(string
), memcached_string_length(string
));
181 c_ptr
[memcached_string_length(string
)]= 0;
186 memcached_return_t
memcached_string_reset(memcached_string_st
*string
)
188 string
->end
= string
->string
;
190 return MEMCACHED_SUCCESS
;
193 void memcached_string_free(memcached_string_st
*ptr
)
200 libmemcached_free(ptr
->root
, ptr
->string
);
203 if (memcached_is_allocated(ptr
))
205 libmemcached_free(ptr
->root
, ptr
);
209 ptr
->options
.is_initialized
= false;
213 memcached_return_t
memcached_string_check(memcached_string_st
*string
, size_t need
)
215 return _string_check(string
, need
);
218 size_t memcached_string_length(const memcached_string_st
*self
)
220 return (size_t)(self
->end
- self
->string
);
223 size_t memcached_string_size(const memcached_string_st
*self
)
225 return self
->current_size
;
228 const char *memcached_string_value(const memcached_string_st
*self
)
233 char *memcached_string_value_mutable(const memcached_string_st
*self
)
238 void memcached_string_set_length(memcached_string_st
*self
, size_t length
)
240 self
->end
= self
->string
+ length
;