diff options
Diffstat (limited to 'usr/src/lib/libast/common/stdio/ungetwc.c')
| -rw-r--r-- | usr/src/lib/libast/common/stdio/ungetwc.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/stdio/ungetwc.c b/usr/src/lib/libast/common/stdio/ungetwc.c new file mode 100644 index 0000000000..0b95324f4f --- /dev/null +++ b/usr/src/lib/libast/common/stdio/ungetwc.c @@ -0,0 +1,39 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#pragma prototyped + +#include "stdhdr.h" + +wint_t +ungetwc(wint_t c, Sfio_t* f) +{ + register unsigned char* s = (unsigned char*)&c; + register unsigned char* e = s + sizeof(c); + + STDIO_INT(f, "ungetwc", wint_t, (wint_t, Sfio_t*), (c, f)) + + FWIDE(f, WEOF); + while (s < e) + if (sfungetc(f, *s++) == EOF) + return WEOF; + return c; +} |