moving strbuf to buffer

buffer.h

@@ -0,0 +1,96 @@
+/* buffer.h
+ *
+ *   Copyright (C) 2010-2011   Henrik Hautakoski <henrik@fiktivkod.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.
+ */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+#include <string.h>
+#include <stddef.h>
+
+struct buffer {
+	unsigned char *block;
+	size_t len;
+	size_t size;
+};
+
+extern unsigned char buffer_null;
+
+#define BUFFER_INIT { &buffer_null, 0, 0 }
+
+void buffer_init(struct buffer *b);
+
+static inline size_t buffer_avail(struct buffer *b) {
+
+	return b->size ? b->size - (b->len + 1) : 0;
+}
+
+void buffer_expand(struct buffer *b, size_t len);
+
+static inline void buffer_setlen(struct buffer *b, size_t len) {
+
+	if (!b->size)
+		return;
+
+	if (len >= b->size)
+		len = b->size - 1;
+	b->len = len;
+}
+
+static inline void buffer_reduce(struct buffer *b, size_t len) {
+
+	if (len > b->len)
+		len = b->len;
+
+	buffer_setlen(b, b->len - len);
+}
+
+char* buffer_cstr(struct buffer *b);
+
+void buffer_free(struct buffer *b);
+
+void buffer_attach(struct buffer *b, void *str, size_t len, size_t size);
+
+void buffer_append(struct buffer *b, const void *ptr, size_t len);
+
+static inline void buffer_append_str(struct buffer *b, const char *str) {
+
+	buffer_append(b, str, strlen(str));
+}
+
+static inline void buffer_append_ch(struct buffer *b, char ch) {
+
+	buffer_expand(b, 1);
+	b->block[b->len++] = ch;
+}
+
+static inline void buffer_append_repeat(struct buffer *b, char ch, size_t len) {
+
+	buffer_expand(b, len);
+	memset(b->block + b->len, ch, len);
+	buffer_setlen(b, b->len + len);
+}
+
+static inline void buffer_str_term(struct buffer *b, char ch) {
+
+	if (b->block[b->len - 1] != ch)
+		buffer_append_ch(b, ch);
+}
+
+#endif /* BUFFER_H */