93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "TextInputStream.hxx"
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#include "InputLegacy.hxx"
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#include "util/fifo_buffer.h"
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#include "util/Error.hxx"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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TextInputStream::TextInputStream(struct input_stream *_is)
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: is(_is),
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buffer(fifo_buffer_new(4096))
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{
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}
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TextInputStream::~TextInputStream()
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{
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fifo_buffer_free(buffer);
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}
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bool TextInputStream::ReadLine(std::string &line)
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{
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void *dest;
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const char *src, *p;
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size_t length, nbytes;
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do {
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dest = fifo_buffer_write(buffer, &length);
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if (dest != nullptr && length >= 2) {
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/* reserve one byte for the null terminator if
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the last line is not terminated by a
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newline character */
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--length;
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Error error;
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nbytes = input_stream_lock_read(is, dest, length,
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error);
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if (nbytes > 0)
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fifo_buffer_append(buffer, nbytes);
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else if (error.IsDefined()) {
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g_warning("%s", error.GetMessage());
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return false;
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}
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} else
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nbytes = 0;
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auto src_p = fifo_buffer_read(buffer, &length);
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src = reinterpret_cast<const char *>(src_p);
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if (src == nullptr)
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return false;
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p = reinterpret_cast<const char*>(memchr(src, '\n', length));
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if (p == nullptr && nbytes == 0) {
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/* end of file (or line too long): terminate
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the current line */
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dest = fifo_buffer_write(buffer, &nbytes);
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assert(dest != nullptr);
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*(char *)dest = '\n';
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fifo_buffer_append(buffer, 1);
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}
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} while (p == nullptr);
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length = p - src + 1;
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while (p > src && g_ascii_isspace(p[-1]))
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--p;
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line = std::string(src, p - src);
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fifo_buffer_consume(buffer, length);
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return true;
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}
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