fs/output, fs/TextFile: move to fs/io/

1 files changed, 81 insertions, 0 deletions

diff --git a/src/fs/io/TextFile.cxx b/src/fs/io/TextFile.cxx
new file mode 100644
index 000000000..b1a92b9cc
--- /dev/null
+++ b/src/fs/io/TextFile.cxx
@@ -0,0 +1,81 @@
+/*
+ * 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;
+}