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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"
#undef fgetc
#undef fgetc_unlocked
#undef getc
#undef getc_unlocked
#ifdef __DO_UNLOCKED
int attribute_hidden __fgetc_unlocked_internal(FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
/* First the fast path. We're good to go if getc macro enabled. */
if (__STDIO_STREAM_CAN_USE_BUFFER_GET(stream)) {
return __STDIO_STREAM_BUFFER_GET(stream);
}
/* Next quickest... reading and narrow oriented, but macro
* disabled and/or buffer is exhausted. */
if (__STDIO_STREAM_IS_NARROW_READING(stream)
|| !__STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_NARROW)
) {
if (stream->__modeflags & __FLAG_UNGOT) { /* Use ungots first. */
unsigned char uc = stream->__ungot[(stream->__modeflags--) & 1];
stream->__ungot[1] = 0;
__STDIO_STREAM_VALIDATE(stream);
return uc;
}
if (__STDIO_STREAM_BUFFER_RAVAIL(stream)) { /* Have buffered? */
return __STDIO_STREAM_BUFFER_GET(stream);
}
/* Is this a fake stream for *sscanf? */
if (__STDIO_STREAM_IS_FAKE_VSSCANF(stream)) {
__STDIO_STREAM_SET_EOF(stream);
return EOF;
}
/* We need to read from the host environment, so we must
* flush all line buffered streams if the stream is not
* fully buffered. */
if (!__STDIO_STREAM_IS_FBF(stream)) {
__STDIO_FLUSH_LBF_STREAMS;
}
if (__STDIO_STREAM_BUFFER_SIZE(stream)) { /* Do we have a buffer? */
__STDIO_STREAM_DISABLE_GETC(stream);
if(__STDIO_FILL_READ_BUFFER(stream)) { /* Refill succeeded? */
__STDIO_STREAM_ENABLE_GETC(stream); /* FBF or LBF */
return __STDIO_STREAM_BUFFER_GET(stream);
}
} else {
unsigned char uc;
if (__stdio_READ(stream, &uc, 1)) {
return uc;
}
}
}
return EOF;
}
strong_alias(__fgetc_unlocked_internal,__fgetc_unlocked)
weak_alias(__fgetc_unlocked_internal,fgetc_unlocked)
weak_alias(__fgetc_unlocked_internal,getc_unlocked)
#ifndef __UCLIBC_HAS_THREADS__
weak_alias(__fgetc_unlocked_internal,fgetc)
weak_alias(__fgetc_unlocked_internal,getc)
#endif
#elif defined __UCLIBC_HAS_THREADS__
int fgetc(register FILE *stream)
{
if (stream->__user_locking != 0) {
return __GETC_UNLOCKED_MACRO(stream);
} else {
int retval;
__STDIO_ALWAYS_THREADLOCK(stream);
retval = __GETC_UNLOCKED_MACRO(stream);
__STDIO_ALWAYS_THREADUNLOCK(stream);
return retval;
}
}
weak_alias(fgetc,getc);
#endif
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