159 lines
3.7 KiB
C++
159 lines
3.7 KiB
C++
/*
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PIP - Platform Independent Primitives
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File
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Copyright (C) 2014 Ivan Pelipenko peri4ko@gmail.com
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pifile.h"
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/*! \class PIFile
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* \brief Local file
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*
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* \section PIFile_sec0 Synopsis
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* This class provide access to local file. You can manipulate
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* binary content or use this class as text stream. To binary
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* access there are function \a read(), \a write(), and many
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* \a writeBinary() functions. For write variables to file in
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* their text representation threr are many "<<" operators.
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*
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* \section PIFile_sec1 Position
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* Each opened file has a read/write position - logical position
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* in the file content you read from or you write to. You can
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* find out current position with function \a pos(). Function
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* \a seek(llong position) move position to position "position",
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* \a seekToBegin() move position to the begin of file,
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* \a seekToEnd() move position to the end of file.
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*
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*/
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REGISTER_DEVICE(PIFile);
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bool PIFile::openDevice() {
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close();
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if (path().isEmpty()) return false;
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//piCout << "fopen " << path_.data() << ": " << strType(mode_).data() << fd;
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fd = fopen(path().data(), strType(mode_).data());
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opened_ = (fd != 0);
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#ifndef WINDOWS
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if (opened_) fcntl(fileno(fd), F_SETFL, O_NONBLOCK);
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#endif
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seekToBegin();
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//piCout << "open file" << fd << opened_;
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return opened_;
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}
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bool PIFile::closeDevice() {
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//piCout << "close file" << fd << opened_;
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if (!opened_ || fd == 0) return true;
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bool cs = (fclose(fd) == 0);
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if (cs) fd = 0;
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//piCout << "closed file" << fd << opened_;
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return cs;
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}
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PIString PIFile::readLine() {
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PIString str;
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if (!opened_) return str;
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int cc, cp = 0;
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while (!isEnd() && cp < 4095) {
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cc = fgetc(fd);
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if (char(cc) == '\n' || cc == EOF) break;
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str.push_back(char(cc));
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}
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//cout << "readline: " << str << endl;
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return str;
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}
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llong PIFile::readAll(void * data) {
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llong cp = pos(), s = size(), i = -1;
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seekToBegin();
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if (s < 0) {
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while (!isEnd())
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read(&(((char*)data)[++i]), 1);
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} else
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read((char * )data, s);
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seek(cp);
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return s;
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}
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PIByteArray PIFile::readAll(bool forceRead) {
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PIByteArray a;
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llong cp = pos();
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if (forceRead) {
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seekToBegin();
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while (!isEnd())
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a.push_back(readChar());
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seek(cp);
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return a;
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}
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llong s = size();
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if (s < 0) return a;
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a.resize(s);
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s = readAll(a.data());
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seek(cp);
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if (s >= 0) a.resize(s);
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return a;
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}
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llong PIFile::size() {
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if (!opened_) return -1;
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llong s, cp = pos();
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seekToEnd();
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s = pos();
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seek(cp);
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return s;
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}
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void PIFile::resize(llong new_size, uchar fill_) {
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llong ds = new_size - size();
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if (ds == 0) return;
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if (ds > 0) {
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uchar * buff = new uchar[ds];
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memset(buff, fill_, ds);
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write(buff, ds);
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delete[] buff;
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return;
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}
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piCoutObj << "Downsize is not support yet :-(";
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}
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bool PIFile::isExists(const PIString & path) {
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FILE * f = fopen(PIString(path).data(), "r");
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bool ok = (f != 0);
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if (ok) fclose(f);
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return ok;
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}
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PIString PIFile::constructFullPath() const {
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return fullPathPrefix() + "://" + path();
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}
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void PIFile::configureFromFullPath(const PIString & full_path) {
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setPath(full_path);
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}
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