/* 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 __DO_UNLOCKED weak_alias(__fgetwc_unlocked,fgetwc_unlocked); weak_alias(__fgetwc_unlocked,getwc_unlocked); #ifndef __UCLIBC_HAS_THREADS__ weak_alias(__fgetwc_unlocked,fgetwc); weak_alias(__fgetwc_unlocked,getwc); #endif static void munge_stream(register FILE *stream, unsigned char *buf) { stream->__bufend = stream->__bufstart = buf; __STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream); __STDIO_STREAM_DISABLE_GETC(stream); __STDIO_STREAM_DISABLE_PUTC(stream); } 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; } #elif defined __UCLIBC_HAS_THREADS__ weak_alias(fgetwc,getwc); wint_t fgetwc(register FILE *stream) { wint_t retval; __STDIO_AUTO_THREADLOCK_VAR; __STDIO_AUTO_THREADLOCK(stream); retval = __fgetwc_unlocked(stream); __STDIO_AUTO_THREADUNLOCK(stream); return retval; } #endif