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/**
* ======================== legal notice ======================
*
* File: LineReader.cc
* Created: 28. Juli 2012, 06
* Author: <a href="mailto:geronimo013@gmx.de">Geronimo</a>
* Project: libIO: classes for files, filesystem and input/output
*
* CMP - compound media player
*
* is a client/server mediaplayer intended to play any media from any workstation
* without the need to export or mount shares. cmps is an easy to use backend
* with a (ready to use) HTML-interface. Additionally the backend supports
* authentication via HTTP-digest authorization.
* cmpc is a client with vdr-like osd-menues.
*
* Copyright (c) 2012 Reinhard Mantey, some rights reserved!
* published under Creative Commons by-sa
* For details see http://creativecommons.org/licenses/by-sa/3.0/
*
* The cmp project's homepage is at http://projects.vdr-developer.org/projects/cmp
*
* --------------------------------------------------------------
*/
#include <LineReader.h>
#include <Reader.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <iostream>
cLineReader::cLineReader(cReader *FileReader)
: reader(FileReader)
, bytesRead(0)
, off(0)
, bufSize(1024)
, buf(NULL)
, lastLine(NULL)
{
buf = (char *) malloc(bufSize + 1);
if (buf) {
buf[bufSize] = 0;
*buf = 0;
}
}
cLineReader::~cLineReader()
{
Close();
}
void cLineReader::Close()
{
if (reader) {
delete reader;
reader = NULL;
}
free(buf);
buf = NULL;
off = NULL;
}
const char *cLineReader::ReadLine(void)
{
const char *rv = NULL;
char *p;
if (lastLine) lastLine += strlen(lastLine) + 1;
else lastLine = buf;
if (bytesRead && lastLine - buf >= bytesRead) return NULL;
p = strchr(lastLine, '\n');
if (!p && strlen(lastLine)) {
memmove(buf, lastLine, strlen(lastLine));
buf[strlen(lastLine)] = 0;
lastLine = buf;
}
if (!p && (!bytesRead || bytesRead == bufSize)) {
bytesRead = strlen(buf);
int br = reader->Read(buf + bytesRead, bufSize - bytesRead);
if (br > 0) bytesRead += br;
if (bytesRead < bufSize) memset(buf + bytesRead, 0, bufSize - bytesRead);
}
if (!p) p = strchr(lastLine, '\n');
if (p) {
if (p - buf <= bytesRead) {
*p = 0;
rv = lastLine;
}
}
else {
if (strlen(lastLine)) rv = lastLine;
}
return rv;
}
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