From dbb1e732b83645156ced0075444b1f309b66209c Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Mon, 12 Oct 2009 22:30:59 +0200 Subject: text_input_stream: input_stream wrapper for reading text files --- src/text_input_stream.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 src/text_input_stream.c (limited to 'src/text_input_stream.c') diff --git a/src/text_input_stream.c b/src/text_input_stream.c new file mode 100644 index 00000000..ec81c9a2 --- /dev/null +++ b/src/text_input_stream.c @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2003-2009 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 "text_input_stream.h" +#include "input_stream.h" +#include "fifo_buffer.h" + +#include + +#include + +struct text_input_stream { + struct input_stream *is; + + struct fifo_buffer *buffer; + + char *line; +}; + +struct text_input_stream * +text_input_stream_new(struct input_stream *is) +{ + struct text_input_stream *tis = g_new(struct text_input_stream, 1); + + tis->is = is; + tis->buffer = fifo_buffer_new(4096); + tis->line = NULL; + + return tis; +} + +void +text_input_stream_free(struct text_input_stream *tis) +{ + fifo_buffer_free(tis->buffer); + g_free(tis->line); + g_free(tis); +} + +const char * +text_input_stream_read(struct text_input_stream *tis) +{ + void *dest; + const char *src, *p; + size_t length, nbytes; + + g_free(tis->line); + tis->line = NULL; + + do { + dest = fifo_buffer_write(tis->buffer, &length); + if (dest != NULL) { + nbytes = input_stream_read(tis->is, dest, length); + if (nbytes > 0) + fifo_buffer_append(tis->buffer, nbytes); + } + + src = fifo_buffer_read(tis->buffer, &length); + if (src == NULL) + return NULL; + + p = memchr(src, '\n', length); + } while (p == NULL); + + length = p - src + 1; + while (p > src && g_ascii_isspace(p[-1])) + --p; + + tis->line = g_strndup(src, p - src); + fifo_buffer_consume(tis->buffer, length); + return tis->line; +} -- cgit v1.2.3