112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/*
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* Copyright (C) 2003-2011 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 "text_input_stream.h"
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#include "input_stream.h"
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#include "util/fifo_buffer.h"
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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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struct text_input_stream {
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struct input_stream *is;
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struct fifo_buffer *buffer;
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char *line;
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};
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struct text_input_stream *
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text_input_stream_new(struct input_stream *is)
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{
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struct text_input_stream *tis = g_new(struct text_input_stream, 1);
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tis->is = is;
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tis->buffer = fifo_buffer_new(4096);
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tis->line = NULL;
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return tis;
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}
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void
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text_input_stream_free(struct text_input_stream *tis)
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{
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fifo_buffer_free(tis->buffer);
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g_free(tis->line);
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g_free(tis);
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}
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const char *
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text_input_stream_read(struct text_input_stream *tis)
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{
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GError *error = NULL;
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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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g_free(tis->line);
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tis->line = NULL;
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do {
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dest = fifo_buffer_write(tis->buffer, &length);
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if (dest != NULL && 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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nbytes = input_stream_lock_read(tis->is, dest, length,
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&error);
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if (nbytes > 0)
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fifo_buffer_append(tis->buffer, nbytes);
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else if (error != NULL) {
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g_warning("%s", error->message);
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g_error_free(error);
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return NULL;
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}
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} else
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nbytes = 0;
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src = fifo_buffer_read(tis->buffer, &length);
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if (src == NULL)
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return NULL;
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p = memchr(src, '\n', length);
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if (p == NULL && 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(tis->buffer, &nbytes);
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assert(dest != NULL);
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*(char *)dest = '\n';
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fifo_buffer_append(tis->buffer, 1);
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}
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} while (p == NULL);
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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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tis->line = g_strndup(src, p - src);
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fifo_buffer_consume(tis->buffer, length);
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return tis->line;
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}
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