diff options
Diffstat (limited to 'src/lib/libast/sfio/sfgetl.c')
| -rw-r--r-- | src/lib/libast/sfio/sfgetl.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/lib/libast/sfio/sfgetl.c b/src/lib/libast/sfio/sfgetl.c new file mode 100644 index 0000000..bc83229 --- /dev/null +++ b/src/lib/libast/sfio/sfgetl.c @@ -0,0 +1,70 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2011 AT&T Intellectual Property * +* and is licensed under the * +* Eclipse Public License, Version 1.0 * +* by AT&T Intellectual Property * +* * +* A copy of the License is available at * +* http://www.eclipse.org/org/documents/epl-v10.html * +* (with md5 checksum b35adb5213ca9657e911e9befb180842) * +* * +* 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> * +* * +***********************************************************************/ +#include "sfhdr.h" + +/* Read a long value coded in a portable format. +** +** Written by Kiem-Phong Vo +*/ + +#if __STD_C +Sflong_t sfgetl(Sfio_t* f) +#else +Sflong_t sfgetl(f) +Sfio_t* f; +#endif +{ + Sflong_t v; + uchar *s, *ends, c; + int p; + SFMTXDECL(f); /* declare a local stream variable for multithreading */ + + SFMTXENTER(f,(Sflong_t)(-1)); + + if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0) + SFMTXRETURN(f, (Sflong_t)(-1)); + SFLOCK(f,0); + + for(v = 0;;) + { if(SFRPEEK(f,s,p) <= 0) + { f->flags |= SF_ERROR; + v = (Sflong_t)(-1); + goto done; + } + for(ends = s+p; s < ends;) + { c = *s++; + if(c&SF_MORE) + v = ((Sfulong_t)v << SF_UBITS) | SFUVALUE(c); + else + { /* special translation for this byte */ + v = ((Sfulong_t)v << SF_SBITS) | SFSVALUE(c); + f->next = s; + v = (c&SF_SIGN) ? -v-1 : v; + goto done; + } + } + f->next = s; + } +done : + SFOPEN(f,0); + SFMTXRETURN(f, v); +} |