usr/src/lib/libast/common/disc/sfstrtmp.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23 /*
  24  * Glenn Fowler
  25  * AT&T Research
  26  *
  27  * sfio tmp string buffer support
  28  */
  29
  30 #include <sfio_t.h>
  31 #include <ast.h>
  32
  33 #if __OBSOLETE__ >= 20070101 /* sfstr* macros now use sfsetbuf() */
  34
  35 NoN(sfstrtmp)
  36
  37 #else
  38
  39 #if defined(__EXPORT__)
  40 #define extern  __EXPORT__
  41 #endif
  42
  43 /*
  44  * replace buffer in string stream f for either SF_READ or SF_WRITE
  45  */
  46
  47 extern int
  48 sfstrtmp(register Sfio_t* f, int mode, void* buf, size_t siz)
  49 {
  50         if (!(f->_flags & SF_STRING))
  51                 return -1;
  52         if (f->_flags & SF_MALLOC)
  53                 free(f->_data);
  54         f->_flags &= ~(SF_ERROR|SF_MALLOC);
  55         f->mode = mode;
  56         f->_next = f->_data = (unsigned char*)buf;
  57         f->_endw = f->_endr = f->_endb = f->_data + siz;
  58         f->_size = siz;
  59         return 0;
  60 }
  61
  62 #endif