84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
#ifndef lint
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static char rcsid[] = "@(#$Id: readfile.cpp,v 1.7 2007-12-13 06:58:22 dockes Exp $ (C) 2004 J.F.Dockes";
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#endif
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#ifndef O_STREAMING
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#define O_STREAMING 0
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#endif
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#include <errno.h>
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#include <cstring>
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#include <string>
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#ifndef NO_NAMESPACES
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using std::string;
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#endif /* NO_NAMESPACES */
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#include "readfile.h"
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static void caterrno(string *reason)
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{
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#define ERRBUFSZ 200
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char errbuf[ERRBUFSZ];
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if (reason) {
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#ifdef sun
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// Note: sun strerror is noted mt-safe ??
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*reason += string("file_to_string: open failed: ") + strerror(errno);
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#else
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strerror_r(errno, errbuf, ERRBUFSZ);
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*reason += string("file_to_string: open failed: ") + errbuf;
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#endif
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}
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}
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bool file_to_string(const string &fn, string &data, string *reason)
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{
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bool ret = false;
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int fd = open(fn.c_str(), O_RDONLY|O_STREAMING);
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if (fd < 0) {
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caterrno(reason);
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return false;
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}
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char buf[4096];
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for (;;) {
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int n = read(fd, buf, 4096);
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if (n < 0) {
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caterrno(reason);
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goto out;
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}
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if (n == 0)
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break;
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try {
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data.append(buf, n);
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} catch (...) {
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caterrno(reason);
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goto out;
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}
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}
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ret = true;
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out:
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if (fd >= 0)
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close(fd);
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return ret;
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}
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