ucx: ucx/memstream.h@733f22fca61a

discarded memprintf / memscanf

Reason: memscanf has no chance to get the amount of bytes read

     1 #ifndef MEMSTREAM_H

     2 #define	MEMSTREAM_H

     4 #include <stdio.h>

     6 /* as fmemopen is a C extension we provide our cross plattform stuff here */

     8 #ifdef	__cplusplus

     9 extern "C" {

    10 #endif

    13 /* as FILE is opaque, we don't do evil hacks but provide an alternative */

    14 typedef struct UcxMemstream UcxMemstream;

    16 UcxMemstream *ucx_memopen(void *space, size_t length);

    17 void ucx_memclose(UcxMemstream* stream);

    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);

    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);

    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);

    50 #ifdef	__cplusplus

    51 }

    52 #endif

    54 #endif	/* MEMSTREAM_H */

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