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 */ |
111 |