1N/A/***********************************************************************
1N/A* *
1N/A* This software is part of the ast package *
1N/A* Copyright (c) 1985-2011 AT&T Intellectual Property *
1N/A* and is licensed under the *
1N/A* Common Public License, Version 1.0 *
1N/A* by AT&T Intellectual Property *
1N/A* *
1N/A* A copy of the License is available at *
1N/A* http://www.opensource.org/licenses/cpl1.0.txt *
1N/A* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
1N/A* *
1N/A* Information and Software Systems Research *
1N/A* AT&T Research *
1N/A* Florham Park NJ *
1N/A* *
1N/A* Glenn Fowler <gsf@research.att.com> *
1N/A* David Korn <dgk@research.att.com> *
1N/A* Phong Vo <kpv@research.att.com> *
1N/A* *
1N/A***********************************************************************/
1N/A#include "sfhdr.h"
1N/A
1N/A/* Resize a stream.
1N/A Written by Kiem-Phong Vo.
1N/A*/
1N/A
1N/A#if __STD_C
1N/Aint sfresize(Sfio_t* f, Sfoff_t size)
1N/A#else
1N/Aint sfresize(f, size)
1N/ASfio_t* f;
1N/ASfoff_t size;
1N/A#endif
1N/A{
1N/A SFMTXDECL(f);
1N/A
1N/A SFMTXENTER(f, -1);
1N/A
1N/A if(size < 0 || f->extent < 0 ||
1N/A (f->mode != SF_WRITE && _sfmode(f,SF_WRITE,0) < 0) )
1N/A SFMTXRETURN(f, -1);
1N/A
1N/A SFLOCK(f,0);
1N/A
1N/A if(f->flags&SF_STRING)
1N/A { SFSTRSIZE(f);
1N/A
1N/A if(f->extent >= size)
1N/A { if((f->flags&SF_MALLOC) && (f->next - f->data) <= size)
1N/A { size_t s = (((size_t)size + 1023)/1024)*1024;
1N/A Void_t* d;
1N/A if(s < f->size && (d = realloc(f->data, s)) )
1N/A { f->data = d;
1N/A f->size = s;
1N/A f->extent = s;
1N/A }
1N/A }
1N/A memclear((char*)(f->data+size), (int)(f->extent-size));
1N/A }
1N/A else
1N/A { if(SFSK(f, size, SEEK_SET, f->disc) != size)
1N/A SFMTXRETURN(f, -1);
1N/A memclear((char*)(f->data+f->extent), (int)(size-f->extent));
1N/A }
1N/A }
1N/A else
1N/A { if(f->next > f->data)
1N/A SFSYNC(f);
1N/A#if _lib_ftruncate
1N/A if(ftruncate(f->file, (sfoff_t)size) < 0)
1N/A SFMTXRETURN(f, -1);
1N/A#else
1N/A SFMTXRETURN(f, -1);
1N/A#endif
1N/A }
1N/A
1N/A f->extent = size;
1N/A
1N/A SFOPEN(f, 0);
1N/A
1N/A SFMTXRETURN(f, 0);
1N/A}