Commit | Line | Data |
---|---|---|
116a02e3 JG |
1 | /* |
2 | * MessagePack for C simple buffer implementation | |
3 | * | |
4 | * Copyright (C) 2008-2009 FURUHASHI Sadayuki | |
5 | * | |
6 | * Distributed under the Boost Software License, Version 1.0. | |
7 | * (See accompanying file LICENSE_1_0.txt or copy at | |
8 | * http://www.boost.org/LICENSE_1_0.txt) | |
9 | */ | |
10 | #ifndef MSGPACK_SBUFFER_H | |
11 | #define MSGPACK_SBUFFER_H | |
12 | ||
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | ||
16 | #ifdef __cplusplus | |
17 | extern "C" { | |
18 | #endif | |
19 | ||
20 | ||
21 | /** | |
22 | * @defgroup msgpack_sbuffer Simple buffer | |
23 | * @ingroup msgpack_buffer | |
24 | * @{ | |
25 | */ | |
26 | ||
27 | typedef struct msgpack_sbuffer { | |
28 | size_t size; | |
29 | char* data; | |
30 | size_t alloc; | |
31 | } msgpack_sbuffer; | |
32 | ||
33 | static inline void msgpack_sbuffer_init(msgpack_sbuffer* sbuf) | |
34 | { | |
35 | memset(sbuf, 0, sizeof(msgpack_sbuffer)); | |
36 | } | |
37 | ||
38 | static inline void msgpack_sbuffer_destroy(msgpack_sbuffer* sbuf) | |
39 | { | |
40 | free(sbuf->data); | |
41 | } | |
42 | ||
43 | static inline msgpack_sbuffer* msgpack_sbuffer_new(void) | |
44 | { | |
45 | return (msgpack_sbuffer*)calloc(1, sizeof(msgpack_sbuffer)); | |
46 | } | |
47 | ||
48 | static inline void msgpack_sbuffer_free(msgpack_sbuffer* sbuf) | |
49 | { | |
50 | if(sbuf == NULL) { return; } | |
51 | msgpack_sbuffer_destroy(sbuf); | |
52 | free(sbuf); | |
53 | } | |
54 | ||
55 | #ifndef MSGPACK_SBUFFER_INIT_SIZE | |
56 | #define MSGPACK_SBUFFER_INIT_SIZE 8192 | |
57 | #endif | |
58 | ||
59 | static inline int msgpack_sbuffer_write(void* data, const char* buf, size_t len) | |
60 | { | |
61 | msgpack_sbuffer* sbuf = (msgpack_sbuffer*)data; | |
62 | ||
63 | if(sbuf->alloc - sbuf->size < len) { | |
64 | void* tmp; | |
65 | size_t nsize = (sbuf->alloc) ? | |
66 | sbuf->alloc * 2 : MSGPACK_SBUFFER_INIT_SIZE; | |
67 | ||
68 | while(nsize < sbuf->size + len) { | |
69 | size_t tmp_nsize = nsize * 2; | |
70 | if (tmp_nsize <= nsize) { | |
71 | nsize = sbuf->size + len; | |
72 | break; | |
73 | } | |
74 | nsize = tmp_nsize; | |
75 | } | |
76 | ||
77 | tmp = realloc(sbuf->data, nsize); | |
78 | if(!tmp) { return -1; } | |
79 | ||
80 | sbuf->data = (char*)tmp; | |
81 | sbuf->alloc = nsize; | |
82 | } | |
83 | ||
84 | memcpy(sbuf->data + sbuf->size, buf, len); | |
85 | sbuf->size += len; | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static inline char* msgpack_sbuffer_release(msgpack_sbuffer* sbuf) | |
90 | { | |
91 | char* tmp = sbuf->data; | |
92 | sbuf->size = 0; | |
93 | sbuf->data = NULL; | |
94 | sbuf->alloc = 0; | |
95 | return tmp; | |
96 | } | |
97 | ||
98 | static inline void msgpack_sbuffer_clear(msgpack_sbuffer* sbuf) | |
99 | { | |
100 | sbuf->size = 0; | |
101 | } | |
102 | ||
103 | /** @} */ | |
104 | ||
105 | ||
106 | #ifdef __cplusplus | |
107 | } | |
108 | #endif | |
109 | ||
110 | #endif /* msgpack/sbuffer.h */ |