push

gbuf.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2008-2013 Various Authors
+ * Copyright 2008 Timo Hirvonen
+ *
+ * This code is largely based on strbuf in the GIT version control system.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CMUS_GBUF_H
+#define CMUS_GBUF_H
+
+#include "compiler.h"
+#include "uchar.h"
+
+#include <stddef.h> /* size_t */
+#include <stdarg.h>
+
+struct gbuf {
+	char *buffer;
+	size_t alloc;
+	size_t len;
+};
+
+extern char gbuf_empty_buffer[];
+
+#define GBUF(name) struct gbuf name = { gbuf_empty_buffer, 0, 0 }
+
+static inline void gbuf_clear(struct gbuf *buf)
+{
+	buf->len = 0;
+	buf->buffer[0] = 0;
+}
+
+static inline size_t gbuf_avail(struct gbuf *buf)
+{
+	if (buf->alloc)
+		return buf->alloc - buf->len - 1;
+	return 0;
+}
+
+void gbuf_grow(struct gbuf *buf, size_t more);
+void gbuf_used(struct gbuf *buf, size_t used);
+void gbuf_free(struct gbuf *buf);
+void gbuf_add_ch(struct gbuf *buf, char ch);
+void gbuf_add_uchar(struct gbuf *buf, uchar u);
+void gbuf_add_bytes(struct gbuf *buf, const void *data, size_t len);
+void gbuf_add_str(struct gbuf *buf, const char *str);
+void gbuf_add_ustr(struct gbuf *buf, const char *src, int *width);
+void gbuf_addf(struct gbuf *buf, const char *fmt, ...) CMUS_FORMAT(2, 3);
+void gbuf_vaddf(struct gbuf *buf, const char *fmt, va_list ap);
+void gbuf_set(struct gbuf *buf, int c, size_t count);
+char *gbuf_steal(struct gbuf *buf);
+
+#endif