comparison: ucx/memstream.h
ucx/memstream.h
- changeset 60
- abae4669fba7
- parent 58
- 733f22fca61a
equal
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inserted
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| 59:c80c910fe191 | 60:abae4669fba7 |
|---|---|
| 1 #ifndef MEMSTREAM_H | |
| 2 #define MEMSTREAM_H | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 | |
| 6 /* as fmemopen is a C extension we provide our cross plattform stuff here */ | |
| 7 | |
| 8 #ifdef __cplusplus | |
| 9 extern "C" { | |
| 10 #endif | |
| 11 | |
| 12 | |
| 13 /* as FILE is opaque, we don't do evil hacks but provide an alternative */ | |
| 14 typedef struct UcxMemstream UcxMemstream; | |
| 15 | |
| 16 UcxMemstream *ucx_memopen(void *space, size_t length); | |
| 17 void ucx_memclose(UcxMemstream* stream); | |
| 18 | |
| 19 /* | |
| 20 * Moves the position of the stream to a new position relative to whence. | |
| 21 * | |
| 22 * SEEK_SET marks the start of the buffer | |
| 23 * SEEK_CUR marks the current position | |
| 24 * SEEK_END marks the first 0-byte in the buffer | |
| 25 * | |
| 26 * ucx_memseek returns 0 on success and -1 if the new position is beyond the | |
| 27 * bounds of the allocated buffer. In that case the position of the stream | |
| 28 * remains unchanged. | |
| 29 * | |
| 30 */ | |
| 31 int ucx_memseek(UcxMemstream *stream, off_t offset, int whence); | |
| 32 size_t ucx_memtell(UcxMemstream *stream); | |
| 33 | |
| 34 /* | |
| 35 * returns non-zero, iff the current stream position has exceeded the last | |
| 36 * available byte of the underlying buffer | |
| 37 * | |
| 38 */ | |
| 39 int ucx_memeof(UcxMemstream *stream); | |
| 40 | |
| 41 /* memwrite, memread, memputc and memreadc shall not generate overflows */ | |
| 42 size_t ucx_memio(void *d, size_t s, size_t n, UcxMemstream* m, _Bool read); | |
| 43 #define ucx_memwrite(data, itemsize, nitems, memstream) \ | |
| 44 ucx_memio(data, itemsize, nitems, memstream, 0) | |
| 45 #define ucx_memread(data, itemsize, nitems, memstream) \ | |
| 46 ucx_memio(data, itemsize, nitems, memstream, 1) | |
| 47 int ucx_memputc(UcxMemstream *stream, int c); | |
| 48 int ucx_memgetc(UcxMemstream *stream); | |
| 49 | |
| 50 #ifdef __cplusplus | |
| 51 } | |
| 52 #endif | |
| 53 | |
| 54 #endif /* MEMSTREAM_H */ | |
| 55 |
