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/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*
* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
*/
#include "_stdio.h"
#ifdef __STDIO_BUFFERS
/* Either buffer data or (commit buffer if necessary and) write. */
size_t __stdio_fwrite(const unsigned char * __restrict buffer,
size_t bytes,
register FILE * __restrict stream)
{
size_t pending;
const unsigned char *p;
__STDIO_STREAM_VALIDATE(stream);
assert(__STDIO_STREAM_IS_WRITING(stream));
assert(buffer);
assert(bytes);
if (!__STDIO_STREAM_IS_NBF(stream)) { /* FBF or LBF. */
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: Try to consolidate some of the code?
#endif
if (__STDIO_STREAM_IS_FAKE_VSNPRINTF(stream)) {
pending = __STDIO_STREAM_BUFFER_WAVAIL(stream);
if (pending > bytes) {
pending = bytes;
}
memcpy(stream->__bufpos, buffer, pending);
stream->__bufpos += pending;
__STDIO_STREAM_VALIDATE(stream);
return bytes;
}
/* RETRY: */
if (bytes <= __STDIO_STREAM_BUFFER_WAVAIL(stream)) {
memcpy(stream->__bufpos, buffer, bytes);
stream->__bufpos += bytes;
if (__STDIO_STREAM_IS_LBF(stream)
&& memrchr(buffer, '\n', bytes) /* Search backwards. */
) {
if ((pending = __STDIO_COMMIT_WRITE_BUFFER(stream)) > 0) {
if (pending > bytes) {
pending = bytes;
}
buffer += (bytes - pending);
if ((p = memchr(buffer, '\n', pending)) != NULL) {
pending = (buffer + pending) - p;
bytes -= pending;
stream->__bufpos -= pending;
}
}
}
__STDIO_STREAM_VALIDATE(stream);
return bytes;
}
/* FBF or LBF and not enough space in buffer. */
if (__STDIO_STREAM_BUFFER_WUSED(stream)) { /* Buffered data. */
if (__STDIO_COMMIT_WRITE_BUFFER(stream)) { /* Commit failed! */
return 0;
}
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: Do we want to try again if data now fits in buffer?
#endif
/* goto RETRY; */
}
}
return __stdio_WRITE(stream, buffer, bytes);
}
#endif
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