int FSEEK(register FILE *stream, OFFSET_TYPE offset, int whence)
{
#if defined(__UCLIBC_HAS_LFS__) && !defined(__DO_LARGEFILE)
return fseeko64(stream, offset, whence);
#else
__offmax_t pos = offset;
int retval = -1;
__STDIO_AUTO_THREADLOCK_VAR;
if (((unsigned int) whence) > 2) {
__set_errno(EINVAL);
} else {
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
if ((!__STDIO_STREAM_IS_WRITING(stream)
|| !__STDIO_COMMIT_WRITE_BUFFER(stream))
&& ((whence != SEEK_CUR)
|| (__stdio_adjust_position(stream, &pos) >= 0))
&& (__SEEK(stream, &pos, whence) >= 0)
) {
/* Clear reading/writing modes, EOF, and ungots. */
stream->__modeflags &=
~(__MASK_READING|__FLAG_WRITING|__FLAG_EOF);
/* Make sure all pointers are reset. */
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream);
__STDIO_STREAM_DISABLE_GETC(stream);
__STDIO_STREAM_DISABLE_PUTC(stream);
/* We reinitialize the mbstate object. Doing so is
* implementation defined behavior. */
#ifdef __STDIO_MBSTATE
__INIT_MBSTATE(&(stream->__state));
#endif
#ifdef __UCLIBC_HAS_WCHAR__
stream->__ungot_width[0] = 0;
#endif
retval = 0;
}
__STDIO_STREAM_VALIDATE(stream);
__STDIO_AUTO_THREADUNLOCK(stream);
}
return retval;
#endif
}
int fflush_unlocked(register FILE *stream)
{
#ifdef __STDIO_BUFFERS
int retval = 0;
#ifdef __UCLIBC_MJN3_ONLY__
#warning REMINDER: should probably define a modeflags type
#endif
unsigned short bufmask = __FLAG_LBF;
#ifndef NDEBUG
if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
__STDIO_STREAM_VALIDATE(stream); /* debugging only */
}
#endif
if (stream == (FILE *) &_stdio_openlist) { /* Flush all lbf streams. */
stream = NULL;
bufmask = 0;
}
if (!stream) { /* Flush all (lbf) writing streams. */
__STDIO_OPENLIST_INC_USE;
__STDIO_THREADLOCK_OPENLIST_ADD;
stream = _stdio_openlist;
__STDIO_THREADUNLOCK_OPENLIST_ADD;
while(stream) {
/* We only care about currently writing streams and do not want to
* block trying to obtain mutexes on non-writing streams. */
#warning fix for nonatomic
#warning unnecessary check if no threads
if (__STDIO_STREAM_IS_WRITING(stream)) { /* ONLY IF ATOMIC!!! */
__MY_STDIO_THREADLOCK(stream);
/* Need to check again once we have the lock. */
if (!(((stream->__modeflags | bufmask)
^ (__FLAG_WRITING|__FLAG_LBF)
) & (__FLAG_WRITING|__MASK_BUFMODE))
) {
if (!__STDIO_COMMIT_WRITE_BUFFER(stream)) {
__STDIO_STREAM_DISABLE_PUTC(stream);
__STDIO_STREAM_CLEAR_WRITING(stream);
} else {
retval = EOF;
}
}
__MY_STDIO_THREADUNLOCK(stream);
}
stream = stream->__nextopen;
}
__STDIO_OPENLIST_DEC_USE;
} else if (__STDIO_STREAM_IS_WRITING(stream)) {
if (!__STDIO_COMMIT_WRITE_BUFFER(stream)) {
__STDIO_STREAM_DISABLE_PUTC(stream);
__STDIO_STREAM_CLEAR_WRITING(stream);
} else {
retval = EOF;
}
}
#if 0
else if (stream->__modeflags & (__MASK_READING|__FLAG_READONLY)) {
/* ANSI/ISO says behavior in this case is undefined but also says you
* shouldn't flush a stream you were reading from. As usual, glibc
* caters to broken programs and simply ignores this. */
__UNDEFINED_OR_NONPORTABLE;
__STDIO_STREAM_SET_ERROR(stream);
__set_errno(EBADF);
retval = EOF;
}
#endif
#ifndef NDEBUG
if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
__STDIO_STREAM_VALIDATE(stream); /* debugging only */
}
#endif
return retval;
#else /* __STDIO_BUFFERS --------------------------------------- */
#ifndef NDEBUG
if ((stream != NULL)
#ifdef __STDIO_HAS_OPENLIST
&& (stream != (FILE *) &_stdio_openlist)
#endif
) {
__STDIO_STREAM_VALIDATE(stream); /* debugging only */
}
#endif
#if 0
if (stream && (stream->__modeflags & (__MASK_READING|__FLAG_READONLY))) {
/* ANSI/ISO says behavior in this case is undefined but also says you
* shouldn't flush a stream you were reading from. As usual, glibc
* caters to broken programs and simply ignores this. */
__UNDEFINED_OR_NONPORTABLE;
__STDIO_STREAM_SET_ERROR(stream);
__set_errno(EBADF);
return EOF;
}
#endif
return 0;
#endif /* __STDIO_BUFFERS */
}
/* We assume here that we are the only remaining thread. */
void attribute_hidden _stdio_term(void)
{
#if defined(__STDIO_BUFFERS) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__)
register FILE *ptr;
#ifdef __UCLIBC_HAS_THREADS__
/* First, make sure the open file list is unlocked. If it was
* locked, then I suppose there is a chance that a pointer in the
* chain might be corrupt due to a partial store.
*/
__stdio_init_mutex(&_stdio_openlist_add_lock);
#warning check
#ifdef __STDIO_BUFFERS
__stdio_init_mutex(&_stdio_openlist_del_lock);
#endif
/* Next we need to worry about the streams themselves. If a stream
* is currently locked, then it may be in an invalid state. So we
* 'disable' it in case a custom stream is stacked on top of it.
* Then we reinitialize the locks.
*/
for (ptr = _stdio_openlist ; ptr ; ptr = ptr->__nextopen ) {
if (__STDIO_ALWAYS_THREADTRYLOCK_CANCEL_UNSAFE(ptr)) {
/* The stream is already locked, so we don't want to touch it.
* However, if we have custom streams, we can't just close it
* or leave it locked since a custom stream may be stacked
* on top of it. So we do unlock it, while also disabling it.
*/
ptr->__modeflags = (__FLAG_READONLY|__FLAG_WRITEONLY);
__STDIO_STREAM_DISABLE_GETC(ptr);
__STDIO_STREAM_DISABLE_PUTC(ptr);
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(ptr);
}
ptr->__user_locking = 1; /* Set locking mode to "by caller". */
__stdio_init_mutex(&ptr->__lock); /* Shouldn't be necessary, but... */
}
#endif
/* Finally, flush all writing streams and shut down all custom streams.
* NOTE: We assume that any stacking by custom streams is done on top
* of streams previously allocated, and hence further down the
* list. Otherwise we have no way of knowing the order in which
* to shut them down.
* Remember that freopen() counts as a new allocation here, even
* though the stream is reused. That's because it moves the
* stream to the head of the list.
*/
for (ptr = _stdio_openlist ; ptr ; ptr = ptr->__nextopen ) {
#ifdef __STDIO_BUFFERS
/* Write any pending buffered chars. */
if (__STDIO_STREAM_IS_WRITING(ptr)) {
__STDIO_COMMIT_WRITE_BUFFER(ptr);
}
#endif
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
/* Actually close all custom streams to perform any special cleanup. */
if (ptr->__cookie != &ptr->__filedes) {
__CLOSE(ptr);
}
#endif
}
#endif
}
int __fputc_unlocked(int c, register FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
/* First the fast path. We're good to go if putc macro enabled. */
if (__STDIO_STREAM_CAN_USE_BUFFER_ADD(stream)) {
__STDIO_STREAM_BUFFER_ADD(stream, ((unsigned char) c));
return (unsigned char) c;
}
/* Next quickest... writing and narrow oriented, but macro
* disabled and/or buffer is full. */
if (__STDIO_STREAM_IS_NARROW_WRITING(stream)
|| !__STDIO_STREAM_TRANS_TO_WRITE(stream, __FLAG_NARROW)
) {
if (__STDIO_STREAM_IS_FAKE_VSNPRINTF(stream)) {
return (unsigned char) c;
}
if (__STDIO_STREAM_BUFFER_SIZE(stream)) { /* Do we have a buffer? */
/* The buffer is full and/or the stream is line buffered. */
if (!__STDIO_STREAM_BUFFER_WAVAIL(stream) /* Buffer full? */
&& __STDIO_COMMIT_WRITE_BUFFER(stream) /* Commit failed! */
) {
goto BAD;
}
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: Should we fail if the commit fails but we now have room?
#endif
__STDIO_STREAM_BUFFER_ADD(stream, ((unsigned char) c));
if (IS_STD_STREAM(stream))
{
if( __STDIO_COMMIT_WRITE_BUFFER(stream))
{
/* Commit failed! */
__STDIO_STREAM_BUFFER_UNADD(stream); /* Undo the write! */
goto BAD;
}
}
else if (__STDIO_STREAM_IS_LBF(stream)) {
if ((((unsigned char) c) == '\n')
&& __STDIO_COMMIT_WRITE_BUFFER(stream)) {
/* Commit failed! */
__STDIO_STREAM_BUFFER_UNADD(stream); /* Undo the write! */
goto BAD;
}
}
} else {
/* NOTE: Do not try to save space by moving uc to the top of
* the file, as that dramaticly increases runtime. */
unsigned char uc = (unsigned char) c;
if (! __stdio_WRITE(stream, &uc, 1)) {
goto BAD;
}
}
return (unsigned char) c;
}
BAD:
return EOF;
}
