wint_t ungetwc(wint_t c, register FILE *stream)
{
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream); /* debugging only */
/* Note: Even if c == WEOF, we need to initialize/verify the
* stream's orientation and ensure the stream is in reading
* mode (if readable and properly oriented). */
if ((!__STDIO_STREAM_IS_WIDE_READING(stream)
&& __STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_WIDE))
|| ((stream->__modeflags & __FLAG_UNGOT)
&& ((stream->__modeflags & 1) || stream->__ungot[1]))
|| (c == WEOF)
) {
c = WEOF;
} else {
/* In the wide case, getc macros should already be disabled. */
/* __STDIO_STREAM_DISABLE_GETC(stream); */
/* Flag this as a user ungot, as scanf does the necessary fixup. */
stream->__ungot[1] = 1;
stream->__ungot[(++stream->__modeflags) & 1] = c;
/* Note: ungot_width is handled by fgetwc. */
__STDIO_STREAM_CLEAR_EOF(stream); /* Must clear end-of-file flag. */
}
__STDIO_STREAM_VALIDATE(stream);
__STDIO_AUTO_THREADUNLOCK(stream);
return c;
}
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 ungetc(int c, register FILE *stream)
{
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: Make fast ungetc an option?
#endif
#ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__
/* If buffered narrow reading with no ungot slots filled, and if not
* ungetting a different char than the one last read from the buffer,
* we can simply decrement the position and not worry about disabling
* the getc macros. This will cut down on overhead in applications
* that use getc/ungetc extensively (like gcc). */
/* NOTE: If we can use getc, then we are buffered narrow reading with
* no ungot slots filled. */
if (__STDIO_STREAM_CAN_USE_BUFFER_GET(stream)
&& (c != EOF)
&& (stream->__bufpos > stream->__bufstart)
&& (stream->__bufpos[-1] == ((unsigned char)c))
) {
--stream->__bufpos;
__STDIO_STREAM_CLEAR_EOF(stream); /* Must clear end-of-file flag. */
} else
#endif
/* Note: Even if c == EOF, we need to initialize/verify the
* stream's orientation and ensure the stream is in reading
* mode (if readable and properly oriented). */
if ((!__STDIO_STREAM_IS_NARROW_READING(stream)
&& __STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_NARROW))
|| ((stream->__modeflags & __FLAG_UNGOT)
&& ((stream->__modeflags & 1) || stream->__ungot[1]))
) {
c = EOF;
} else if (c != EOF) {
__STDIO_STREAM_DISABLE_GETC(stream);
/* Flag this as a user ungot, as scanf does the necessary fixup. */
stream->__ungot[1] = 1;
stream->__ungot[(++stream->__modeflags) & 1] = c;
__STDIO_STREAM_CLEAR_EOF(stream); /* Must clear end-of-file flag. */
}
__STDIO_STREAM_VALIDATE(stream);
__STDIO_AUTO_THREADUNLOCK(stream);
return c;
}
OFFSET_TYPE_T FTELL(register FILE *stream)
{
#if defined(__UCLIBC_HAS_LFS__) && !defined(__DO_LARGEFILE)
__offmax_t pos = __ftello64(stream);
if ((sizeof(long) >= sizeof(__offmax_t)) || (((long) pos) == pos)) {
return ((long) pos);
} else {
__set_errno(EOVERFLOW);
return -1;
}
#else
__offmax_t pos = 0;
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
if ((__SEEK(stream, &pos, SEEK_CUR) < 0)
|| (__stdio_adjust_position(stream, &pos) < 0)) {
pos = -1;
}
__STDIO_AUTO_THREADUNLOCK(stream);
return pos;
#endif
}
FILE *fmemopen(void *s, size_t len, const char *modes)
{
FILE *fp;
register __fmo_cookie *cookie;
size_t i;
if ((cookie = malloc(sizeof(__fmo_cookie))) != NULL) {
cookie->len = len;
cookie->eof = cookie->pos = 0; /* pos and eof adjusted below. */
cookie->dynbuf = 0;
if (((cookie->buf = s) == NULL) && (len > 0)) {
if ((cookie->buf = malloc(len)) == NULL) {
goto EXIT_cookie;
}
cookie->dynbuf = 1;
*cookie->buf = 0; /* If we're appending, treat as empty file. */
}
#ifndef __BCC__
fp = fopencookie(cookie, modes, _fmo_io_funcs);
#else
fp = fopencookie(cookie, modes, &_fmo_io_funcs);
#endif
/* Note: We don't need to worry about locking fp in the thread case
* as the only possible access would be a close or flush with
* nothing currently in the FILE's write buffer. */
if (fp != NULL) {
cookie->fp = fp;
if (fp->__modeflags & __FLAG_READONLY) {
cookie->eof = len;
}
if ((fp->__modeflags & __FLAG_APPEND) && (len > 0)) {
for (i = 0 ; i < len ; i++) {
if (cookie->buf[i] == 0) {
break;
}
}
cookie->eof = cookie->pos = i; /* Adjust eof and pos. */
}
__STDIO_STREAM_VALIDATE(fp);
return fp;
}
}
if (!s) {
free(cookie->buf);
}
EXIT_cookie:
free(cookie);
return NULL;
}
void clearerr(register FILE *stream)
{
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
__CLEARERR_UNLOCKED(stream);
__STDIO_AUTO_THREADUNLOCK(stream);
}
size_t __stdio_READ(register FILE *stream,
unsigned char *buf, size_t bufsize)
{
ssize_t rv = 0;
__STDIO_STREAM_VALIDATE(stream);
assert(stream->__filedes >= -1);
assert(__STDIO_STREAM_IS_READING(stream));
assert(!__STDIO_STREAM_BUFFER_RAVAIL(stream)); /* Buffer must be empty. */
assert(!(stream->__modeflags & __FLAG_UNGOT));
assert(bufsize);
if (!__FEOF_UNLOCKED(stream)) {
if (bufsize > SSIZE_MAX) {
bufsize = SSIZE_MAX;
}
#ifdef __UCLIBC_MJN3_ONLY__
#warning EINTR?
#endif
/* RETRY: */
if ((rv = __READ(stream, buf, bufsize)) <= 0) {
if (rv == 0) {
__STDIO_STREAM_SET_EOF(stream);
} else {
/* if (errno == EINTR) goto RETRY; */
__STDIO_STREAM_SET_ERROR(stream);
rv = 0;
}
#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: Make custom stream read return check optional.
#endif
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
} else {
assert(rv <= bufsize);
if (rv > bufsize) { /* Read more than bufsize! */
abort();
}
#endif
}
}
return rv;
}
int fwide(register FILE *stream, int mode)
{
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
if (mode && !(stream->__modeflags & (__FLAG_WIDE|__FLAG_NARROW))) {
stream->__modeflags |= ((mode > 0) ? __FLAG_WIDE : __FLAG_NARROW);
}
mode = (stream->__modeflags & __FLAG_WIDE)
- (stream->__modeflags & __FLAG_NARROW);
assert((stream->__modeflags & (__FLAG_WIDE|__FLAG_NARROW))
!= (__FLAG_WIDE|__FLAG_NARROW));
__STDIO_AUTO_THREADUNLOCK(stream);
return mode;
}
wint_t fgetwc_unlocked(register FILE *stream)
{
wint_t wi;
wchar_t wc[1];
int n;
size_t r;
unsigned char sbuf[1];
__STDIO_STREAM_VALIDATE(stream);
wi = WEOF; /* Prepare for failure. */
if (__STDIO_STREAM_IS_WIDE_READING(stream)
|| !__STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_WIDE)
) {
if (stream->__modeflags & __FLAG_UNGOT) { /* Any ungetwc()s? */
if (((stream->__modeflags & 1) || stream->__ungot[1])) {
stream->__ungot_width[0] = 0; /* Application ungot... */
} else { /* scanf ungot */
stream->__ungot_width[0] = stream->__ungot_width[1];
}
wi = stream->__ungot[(stream->__modeflags--) & 1];
stream->__ungot[1] = 0;
goto DONE;
}
if (!stream->__bufstart) { /* Ugh... stream isn't buffered! */
/* Munge the stream temporarily to use a 1-byte buffer. */
munge_stream(stream, sbuf);
++stream->__bufend;
}
if (stream->__state.__mask == 0) { /* If last was a complete char */
stream->__ungot_width[0] = 0; /* then reset the width. */
}
LOOP:
if ((n = __STDIO_STREAM_BUFFER_RAVAIL(stream)) == 0) {
goto FILL_BUFFER;
}
r = mbrtowc(wc, stream->__bufpos, n, &stream->__state);
if (((ssize_t) r) >= 0) { /* Success... */
if (r == 0) { /* Nul wide char... means 0 byte for us so */
++r; /* increment r and handle below as single. */
}
stream->__bufpos += r;
stream->__ungot_width[0] += r;
wi = *wc;
goto DONE;
}
if (r == ((size_t) -2)) {
/* Potentially valid but incomplete and no more buffered. */
stream->__bufpos += n; /* Update bufpos for stream. */
stream->__ungot_width[0] += n;
FILL_BUFFER:
if(__STDIO_FILL_READ_BUFFER(stream)) { /* Refill succeeded? */
goto LOOP;
}
if (!__FERROR_UNLOCKED(stream)) { /* EOF with no error. */
if (!stream->__state.__mask) { /* No partial wchar. */
goto DONE;
}
/* EOF but partially complete wchar. */
/* TODO: should EILSEQ be set? */
__set_errno(EILSEQ);
}
}
/* If we reach here, either r == ((size_t)-1) and mbrtowc set errno
* to EILSEQ, or r == ((size_t)-2) and stream is in an error state
* or at EOF with a partially complete wchar. Make sure stream's
* error indicator is set. */
stream->__modeflags |= __FLAG_ERROR;
DONE:
if (stream->__bufstart == sbuf) { /* Need to un-munge the stream. */
munge_stream(stream, NULL);
}
}
__STDIO_STREAM_VALIDATE(stream);
return wi;
}
void __clearerr_unlocked(register FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
__CLEARERR_UNLOCKED(stream);
}
size_t attribute_hidden __stdio_WRITE(register FILE *stream,
register const unsigned char *buf, size_t bufsize)
{
size_t todo;
ssize_t rv, stodo;
__STDIO_STREAM_VALIDATE(stream);
assert(stream->__filedes >= -1);
assert(__STDIO_STREAM_IS_WRITING(stream));
assert(!__STDIO_STREAM_BUFFER_WUSED(stream)); /* Buffer must be empty. */
todo = bufsize;
do {
if (todo == 0) { /* Done? */
__STDIO_STREAM_VALIDATE(stream);
return bufsize;
}
stodo = (todo <= SSIZE_MAX) ? todo : SSIZE_MAX;
if ((rv = __WRITE(stream, (char *) buf, stodo)) >= 0) {
#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: Make custom stream write return check optional.
#endif
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
assert(rv <= stodo);
if (rv > stodo) { /* Wrote more than stodo! */
/* abort(); */
}
#endif
todo -= rv;
buf += rv;
} else
#ifdef __UCLIBC_MJN3_ONLY__
#warning EINTR?
#endif
/* if (errno != EINTR) */
{
__STDIO_STREAM_SET_ERROR(stream);
#ifdef __STDIO_BUFFERS
if ((stodo = __STDIO_STREAM_BUFFER_SIZE(stream)) != 0) {
unsigned char *s;
if (stodo > todo) {
stodo = todo;
}
s = stream->__bufstart;
do {
if (((*s = *buf) == '\n')
&& __STDIO_STREAM_IS_LBF(stream)
) {
break;
}
++s;
++buf;
} while (--stodo);
stream->__bufpos = s;
todo -= (s - stream->__bufstart);
}
#endif /* __STDIO_BUFFERS */
__STDIO_STREAM_VALIDATE(stream);
return bufsize - todo;
}
} while (1);
}
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 */
}
int ftrylockfile(FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
return __STDIO_ALWAYS_THREADTRYLOCK_CANCEL_UNSAFE(stream);
}
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;
}
int fclose(register FILE *stream)
{
int rv = 0;
__STDIO_AUTO_THREADLOCK_VAR;
#ifdef __STDIO_HAS_OPENLIST
#if !defined(__UCLIBC_HAS_THREADS__) || !defined(__STDIO_BUFFERS)
/* First, remove the file from the open file list. */
{
FILE *ptr;
__STDIO_THREADLOCK_OPENLIST_DEL;
__STDIO_THREADLOCK_OPENLIST_ADD;
ptr = _stdio_openlist;
if ((ptr = _stdio_openlist) == stream) {
_stdio_openlist = stream->__nextopen;
} else {
while (ptr) {
if (ptr->__nextopen == stream) {
ptr->__nextopen = stream->__nextopen;
break;
}
ptr = ptr->__nextopen;
}
}
__STDIO_THREADUNLOCK_OPENLIST_ADD;
__STDIO_THREADUNLOCK_OPENLIST_DEL;
}
#endif
#endif
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
#ifdef __STDIO_BUFFERS
/* Write any pending buffered chars. */
if (__STDIO_STREAM_IS_WRITING(stream)) {
rv = fflush_unlocked(stream);
}
#endif
if (__CLOSE(stream) < 0) { /* Must close even if fflush failed. */
rv = EOF;
}
stream->__filedes = -1;
/* We need a way for freopen to know that a file has been closed.
* Since a file can't be both readonly and writeonly, that makes
* an effective signal. It also has the benefit of disabling
* transitions to either reading or writing. */
#if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS)
/* Before we mark the file as closed, make sure we increment the openlist use count
* so it isn't freed under us while still cleaning up. */
__STDIO_OPENLIST_INC_USE;
#endif
stream->__modeflags &= (__FLAG_FREEBUF|__FLAG_FREEFILE);
stream->__modeflags |= (__FLAG_READONLY|__FLAG_WRITEONLY);
#ifndef NDEBUG
__STDIO_STREAM_RESET_GCS(stream);
/* Reinitialize everything (including putc since fflush could fail). */
__STDIO_STREAM_DISABLE_GETC(stream);
__STDIO_STREAM_DISABLE_PUTC(stream);
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream);
# ifdef __UCLIBC_HAS_WCHAR__
stream->__ungot_width[0] = 0;
# endif
# ifdef __STDIO_MBSTATE
__INIT_MBSTATE(&(stream->__state));
# endif
#endif
__STDIO_AUTO_THREADUNLOCK(stream);
__STDIO_STREAM_FREE_BUFFER(stream);
#ifdef __UCLIBC_MJN3_ONLY__
#warning REMINDER: inefficient - locks and unlocks twice and walks whole list
#endif
#if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS)
/* inefficient - locks/unlocks twice and walks whole list */
__STDIO_OPENLIST_INC_DEL_CNT;
__STDIO_OPENLIST_DEC_USE; /* This with free the file if necessary. */
#else
__STDIO_STREAM_FREE_FILE(stream);
#endif
return rv;
}
int ferror(register FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
return __FERROR_UNLOCKED(stream);
}
void funlockfile(FILE *stream)
{
__STDIO_STREAM_VALIDATE(stream);
__STDIO_ALWAYS_THREADUNLOCK_CANCEL_UNSAFE(stream);
}