4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 /* This function writes a chunk of data to a file at the given position.
28 * The pos argument can be ignored if the file is only being used for
29 * streaming. The handler should try to write all of the data it can.
31 typedef int (QEMUFilePutBufferFunc)(void *opaque, const uint8_t *buf,
32 int64_t pos, int size);
34 /* Read a chunk of data from a file at the given position. The pos argument
35 * can be ignored if the file is only be used for streaming. The number of
36 * bytes actually read should be returned.
38 typedef int (QEMUFileGetBufferFunc)(void *opaque, uint8_t *buf,
39 int64_t pos, int size);
43 * Return negative error number on error, 0 or positive value on success.
45 * The meaning of return value on success depends on the specific back-end being
48 typedef int (QEMUFileCloseFunc)(void *opaque);
50 /* Called to return the OS file descriptor associated to the QEMUFile.
52 typedef int (QEMUFileGetFD)(void *opaque);
54 /* Called to determine if the file has exceeded its bandwidth allocation. The
55 * bandwidth capping is a soft limit, not a hard limit.
57 typedef int (QEMUFileRateLimit)(void *opaque);
59 /* Called to change the current bandwidth allocation. This function must return
60 * the new actual bandwidth. It should be new_rate if everything goes ok, and
61 * the old rate otherwise
63 typedef int64_t (QEMUFileSetRateLimit)(void *opaque, int64_t new_rate);
64 typedef int64_t (QEMUFileGetRateLimit)(void *opaque);
66 typedef struct QEMUFileOps {
67 QEMUFilePutBufferFunc *put_buffer;
68 QEMUFileGetBufferFunc *get_buffer;
69 QEMUFileCloseFunc *close;
70 QEMUFileGetFD *get_fd;
71 QEMUFileRateLimit *rate_limit;
72 QEMUFileSetRateLimit *set_rate_limit;
73 QEMUFileGetRateLimit *get_rate_limit;
76 QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops);
77 QEMUFile *qemu_fopen(const char *filename, const char *mode);
78 QEMUFile *qemu_fdopen(int fd, const char *mode);
79 QEMUFile *qemu_fopen_socket(int fd);
80 QEMUFile *qemu_popen(FILE *popen_file, const char *mode);
81 QEMUFile *qemu_popen_cmd(const char *command, const char *mode);
82 int qemu_get_fd(QEMUFile *f);
83 int qemu_fclose(QEMUFile *f);
84 int64_t qemu_ftell(QEMUFile *f);
85 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size);
86 void qemu_put_byte(QEMUFile *f, int v);
88 static inline void qemu_put_ubyte(QEMUFile *f, unsigned int v)
90 qemu_put_byte(f, (int)v);
93 #define qemu_put_sbyte qemu_put_byte
95 void qemu_put_be16(QEMUFile *f, unsigned int v);
96 void qemu_put_be32(QEMUFile *f, unsigned int v);
97 void qemu_put_be64(QEMUFile *f, uint64_t v);
98 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size);
99 int qemu_get_byte(QEMUFile *f);
101 static inline unsigned int qemu_get_ubyte(QEMUFile *f)
103 return (unsigned int)qemu_get_byte(f);
106 #define qemu_get_sbyte qemu_get_byte
108 unsigned int qemu_get_be16(QEMUFile *f);
109 unsigned int qemu_get_be32(QEMUFile *f);
110 uint64_t qemu_get_be64(QEMUFile *f);
112 int qemu_file_rate_limit(QEMUFile *f);
113 int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate);
114 int64_t qemu_file_get_rate_limit(QEMUFile *f);
115 int qemu_file_get_error(QEMUFile *f);
117 static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv)
119 qemu_put_be64(f, *pv);
122 static inline void qemu_put_be32s(QEMUFile *f, const uint32_t *pv)
124 qemu_put_be32(f, *pv);
127 static inline void qemu_put_be16s(QEMUFile *f, const uint16_t *pv)
129 qemu_put_be16(f, *pv);
132 static inline void qemu_put_8s(QEMUFile *f, const uint8_t *pv)
134 qemu_put_byte(f, *pv);
137 static inline void qemu_get_be64s(QEMUFile *f, uint64_t *pv)
139 *pv = qemu_get_be64(f);
142 static inline void qemu_get_be32s(QEMUFile *f, uint32_t *pv)
144 *pv = qemu_get_be32(f);
147 static inline void qemu_get_be16s(QEMUFile *f, uint16_t *pv)
149 *pv = qemu_get_be16(f);
152 static inline void qemu_get_8s(QEMUFile *f, uint8_t *pv)
154 *pv = qemu_get_byte(f);
157 // Signed versions for type safety
158 static inline void qemu_put_sbuffer(QEMUFile *f, const int8_t *buf, int size)
160 qemu_put_buffer(f, (const uint8_t *)buf, size);
163 static inline void qemu_put_sbe16(QEMUFile *f, int v)
165 qemu_put_be16(f, (unsigned int)v);
168 static inline void qemu_put_sbe32(QEMUFile *f, int v)
170 qemu_put_be32(f, (unsigned int)v);
173 static inline void qemu_put_sbe64(QEMUFile *f, int64_t v)
175 qemu_put_be64(f, (uint64_t)v);
178 static inline size_t qemu_get_sbuffer(QEMUFile *f, int8_t *buf, int size)
180 return qemu_get_buffer(f, (uint8_t *)buf, size);
183 static inline int qemu_get_sbe16(QEMUFile *f)
185 return (int)qemu_get_be16(f);
188 static inline int qemu_get_sbe32(QEMUFile *f)
190 return (int)qemu_get_be32(f);
193 static inline int64_t qemu_get_sbe64(QEMUFile *f)
195 return (int64_t)qemu_get_be64(f);
198 static inline void qemu_put_s8s(QEMUFile *f, const int8_t *pv)
200 qemu_put_8s(f, (const uint8_t *)pv);
203 static inline void qemu_put_sbe16s(QEMUFile *f, const int16_t *pv)
205 qemu_put_be16s(f, (const uint16_t *)pv);
208 static inline void qemu_put_sbe32s(QEMUFile *f, const int32_t *pv)
210 qemu_put_be32s(f, (const uint32_t *)pv);
213 static inline void qemu_put_sbe64s(QEMUFile *f, const int64_t *pv)
215 qemu_put_be64s(f, (const uint64_t *)pv);
218 static inline void qemu_get_s8s(QEMUFile *f, int8_t *pv)
220 qemu_get_8s(f, (uint8_t *)pv);
223 static inline void qemu_get_sbe16s(QEMUFile *f, int16_t *pv)
225 qemu_get_be16s(f, (uint16_t *)pv);
228 static inline void qemu_get_sbe32s(QEMUFile *f, int32_t *pv)
230 qemu_get_be32s(f, (uint32_t *)pv);
233 static inline void qemu_get_sbe64s(QEMUFile *f, int64_t *pv)
235 qemu_get_be64s(f, (uint64_t *)pv);