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 //TODO OS(2012-08-01): Ascertain purpose of lineend & potentially remove
20 size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
22 if ( _PDCLIB_prepwrite( stream ) == EOF )
26 _PDCLIB_size_t offset = 0;
27 //bool lineend = false;
29 for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
31 for ( size_t size_i = 0; size_i < size; ++size_i )
33 if ( ( stream->buffer[ stream->bufidx++ ] = ((char*)ptr)[ nmemb_i * size + size_i ] ) == '\n' )
35 /* Remember last newline, in case we have to do a partial line-buffered flush */
36 offset = stream->bufidx;
39 if ( stream->bufidx == stream->bufsize )
41 if ( _PDCLIB_flushbuffer( stream ) == EOF )
43 /* Returning number of objects completely buffered */
50 /* Fully-buffered streams are OK. Non-buffered streams must be flushed,
51 line-buffered streams only if there's a newline in the buffer.
53 switch ( stream->status & ( _IONBF | _IOLBF ) )
56 if ( _PDCLIB_flushbuffer( stream ) == EOF )
58 /* We are in a pinch here. We have an error, which requires a
59 return value < nmemb. On the other hand, all objects have
60 been written to buffer, which means all the caller had to
61 do was removing the error cause, and re-flush the stream...
62 Catch 22. We'll return a value one short, to indicate the
63 error, and can't really do anything about the inconsistency.
70 size_t bufidx = stream->bufidx;
71 stream->bufidx = offset;
72 if ( _PDCLIB_flushbuffer( stream ) == EOF )
74 /* See comment above. */
75 stream->bufidx = bufidx;
78 stream->bufidx = bufidx - offset;
79 memmove( stream->buffer, stream->buffer + offset, stream->bufidx );
88 #include <_PDCLIB_test.h>
92 /* Testing covered by fread(). */