1 /* Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file portable_io.h Inline functions for binary IO. */
5 static inline uint64_t read_portable(unsigned bits
, const void *buf
)
8 int i
, num_bytes
= bits
/ 8;
9 const uint8_t *p
= (typeof(p
))buf
;
11 for (i
= 0; i
< num_bytes
; i
++) {
12 unsigned char c
= p
[i
];
13 ret
+= ((uint64_t)c
<< (8 * i
));
18 static inline uint64_t read_portable_be(unsigned bits
, const void *buf
)
21 int i
, num_bytes
= bits
/ 8;
22 const uint8_t *p
= (typeof(p
))buf
;
24 for (i
= 0; i
< num_bytes
; i
++) {
25 unsigned char c
= p
[i
];
26 ret
+= ((uint64_t)c
<< (8 * (num_bytes
- i
- 1)));
31 static inline uint64_t read_u64(const void *buf
)
33 return read_portable(64, buf
);
36 static inline uint32_t read_u32(const void *buf
)
38 return read_portable(32, buf
);
41 static inline uint16_t read_u16(const void *buf
)
43 return read_portable(16, buf
);
46 static inline uint8_t read_u8(const void *buf
)
48 return read_portable(8, buf
);
51 static inline uint64_t read_u64_be(const void *buf
)
53 return read_portable_be(64, buf
);
56 static inline uint32_t read_u32_be(const void *buf
)
58 return read_portable_be(32, buf
);
61 static inline uint16_t read_u16_be(const void *buf
)
63 return read_portable_be(16, buf
);
66 static inline void write_portable(unsigned bits
, char *buf
, uint64_t val
)
68 int i
, num_bytes
= bits
/ 8;
69 uint8_t *p
= (typeof(p
))buf
;
71 for (i
= 0; i
< num_bytes
; i
++) {
77 static inline void write_portable_be(unsigned bits
, char *buf
, uint64_t val
)
79 int i
, num_bytes
= bits
/ 8;
80 uint8_t *p
= (typeof(p
))buf
;
82 for (i
= 0; i
< num_bytes
; i
++) {
83 p
[num_bytes
- i
- 1] = val
& 0xff;
88 static inline void write_u64(void *buf
, uint64_t val
)
90 write_portable(64, buf
, val
);
93 static inline void write_u32(void *buf
, uint32_t val
)
95 write_portable(32, buf
, (uint64_t) val
);
98 static inline void write_u16(void *buf
, uint16_t val
)
100 write_portable(16, buf
, (uint64_t) val
);
103 static inline void write_u8(void *buf
, uint8_t val
)
105 write_portable(8, buf
, (uint64_t) val
);
108 static inline void write_u64_be(void *buf
, uint64_t val
)
110 write_portable_be(64, buf
, val
);
113 static inline void write_u32_be(void *buf
, uint32_t val
)
115 write_portable_be(32, buf
, (uint64_t) val
);
118 static inline void write_u16_be(void *buf
, uint16_t val
)
120 write_portable_be(16, buf
, (uint64_t) val
);