11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: ftell.c,v 1.6 2005/08/08 08:05:36 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1990, 1993 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * The Regents of the University of California. All rights reserved. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * This code is derived from software contributed to Berkeley by 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Chris Torek. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "local.h" 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ftello: return current offset. 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectoff_t 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectftello(FILE *fp) 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fpos_t pos; 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_seek == NULL) { 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ESPIPE; /* historic practice */ 48f582340a6a48588aa50da17e1620e8f91b146941Kenny Root pos = -1; 49f582340a6a48588aa50da17e1620e8f91b146941Kenny Root goto out; 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Find offset of underlying I/O object, then 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * adjust for buffered bytes. 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 56f582340a6a48588aa50da17e1620e8f91b146941Kenny Root FLOCKFILE(fp); 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __sflush(fp); /* may adjust seek offset on append stream */ 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_flags & __SOFF) 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos = fp->_offset; 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else { 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos = (*fp->_seek)(fp->_cookie, (fpos_t)0, SEEK_CUR); 62f582340a6a48588aa50da17e1620e8f91b146941Kenny Root if (pos == -1) 63f582340a6a48588aa50da17e1620e8f91b146941Kenny Root goto out; 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_flags & __SRD) { 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Reading. Any unread characters (including 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * those from ungetc) cause the position to be 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * smaller than that in the underlying object. 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos -= fp->_r; 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (HASUB(fp)) 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos -= fp->_ur; 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else if (fp->_flags & __SWR && fp->_p != NULL) { 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Writing. Any buffered characters cause the 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * position to be greater than that in the 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * underlying object. 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos += fp->_p - fp->_bf._base; 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 82f582340a6a48588aa50da17e1620e8f91b146941Kenny Rootout: FUNLOCKFILE(fp); 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (pos); 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ftell() returns a long and sizeof(off_t) != sizeof(long) on all arches 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#if defined(__alpha__) && defined(__indr_reference) 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project__indr_reference(ftello, ftell); 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectlong 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectftell(FILE *fp) 941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project long pos; 961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pos = (long)ftello(fp); 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return(pos); 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 1001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 101