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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "TextFile.hxx"
#include "util/Alloc.hxx"
#include "fs/Path.hxx"
#include "fs/FileSystem.hxx"
#include <assert.h>
#include <string.h>
#include <stdlib.h>
TextFile::TextFile(Path path_fs)
:file(FOpen(path_fs, FOpenMode::ReadText)),
buffer((char *)xalloc(step)), capacity(step), length(0) {}
TextFile::~TextFile()
{
free(buffer);
if (file != nullptr)
fclose(file);
}
char *
TextFile::ReadLine()
{
assert(file != nullptr);
while (true) {
if (length >= capacity) {
if (capacity >= max_length)
/* too large already - bail out */
return nullptr;
capacity <<= 1;
char *new_buffer = (char *)realloc(buffer, capacity);
if (new_buffer == nullptr)
/* out of memory - bail out */
return nullptr;
}
char *p = fgets(buffer + length, capacity - length, file);
if (p == nullptr) {
if (length == 0 || ferror(file))
return nullptr;
break;
}
length += strlen(buffer + length);
if (buffer[length - 1] == '\n')
break;
}
/* remove the newline characters */
if (buffer[length - 1] == '\n')
--length;
if (buffer[length - 1] == '\r')
--length;
buffer[length] = 0;
length = 0;
return buffer;
}
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