3 /* fwrite( const void *, size_t, size_t, FILE * )
5 This file is part of the Public Domain C Library (PDCLib).
6 Permission is granted to use, modify, and / or redistribute at will.
13 #include <_PDCLIB_glue.h>
18 size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
20 if ( _PDCLIB_prepwrite( stream ) == EOF )
24 _PDCLIB_size_t offset = 0;
26 /* bool lineend = false; */
28 for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
30 for ( size_t size_i = 0; size_i < size; ++size_i )
32 if ( ( stream->buffer[ stream->bufidx++ ] = ((char*)ptr)[ nmemb_i * size + size_i ] ) == '\n' )
34 /* Remember last newline, in case we have to do a partial line-buffered flush */
35 offset = stream->bufidx;
38 if ( stream->bufidx == stream->bufsize )
40 if ( _PDCLIB_flushbuffer( stream ) == EOF )
42 /* Returning number of objects completely buffered */
45 /* lineend = false; */
49 /* Fully-buffered streams are OK. Non-buffered streams must be flushed,
50 line-buffered streams only if there's a newline in the buffer.
52 switch ( stream->status & ( _IONBF | _IOLBF ) )
55 if ( _PDCLIB_flushbuffer( stream ) == EOF )
57 /* We are in a pinch here. We have an error, which requires a
58 return value < nmemb. On the other hand, all objects have
59 been written to buffer, which means all the caller had to
60 do was removing the error cause, and re-flush the stream...
61 Catch 22. We'll return a value one short, to indicate the
62 error, and can't really do anything about the inconsistency.
69 size_t bufidx = stream->bufidx;
70 stream->bufidx = offset;
71 if ( _PDCLIB_flushbuffer( stream ) == EOF )
73 /* See comment above. */
74 stream->bufidx = bufidx;
77 stream->bufidx = bufidx - offset;
78 memmove( stream->buffer, stream->buffer + offset, stream->bufidx );
87 #include <_PDCLIB_test.h>
91 /* Testing covered by fread(). */