1 files changed, 59 insertions, 0 deletions
diff --git a/string_buf.h b/string_buf.h
new file mode 100644
index 0000000..160b7cb
--- /dev/null
+++ b/string_buf.h
@@ -0,0 +1,59 @@
+/**
+ * C string buffers for easy construction of complex strings
+ *
+ * Copyright (C) 2021 Wojtek Kosior
+ * Redistribution terms are gathered in the `copyright' file.
+ */
+
+#ifndef STRING_BUF_H
+#define STRING_BUF_H
+
+#include <stdio.h>
+#include <stdarg.h>
+
+struct stringbuf {
+	char *buf;
+	size_t buf_len;
+	size_t buf_filled;
+};
+
+void stringbuf_init(struct stringbuf *sb);
+void stringbuf_destroy(struct stringbuf *sb);
+void stringbuf_truncate(struct stringbuf *sb, size_t len);
+
+#define _RAW_BUF_ARGS char **buf, size_t *buf_len, size_t *buf_filled
+
+#define _SB_HEAD(name, ...)					\
+	int sb_##name(struct stringbuf *sb, __VA_ARGS__)
+
+#define _SB_RAW_HEAD(name, ...)				\
+	int sb_raw_##name(_RAW_BUF_ARGS, __VA_ARGS__)
+
+#define _SB_DEFINE_2(name, ...)			\
+	_SB_HEAD(name, __VA_ARGS__);		\
+	_SB_RAW_HEAD(name, __VA_ARGS__)
+
+int extend_buf_raw(_RAW_BUF_ARGS, size_t extend_len);
+int extend_buf(struct stringbuf *sb, size_t extend_len);
+
+int crop_buf_raw(_RAW_BUF_ARGS);
+int crop_buf(struct stringbuf *sb);
+
+_SB_DEFINE_2(bytes, const void *bytes, size_t bytes_len);
+_SB_DEFINE_2(string, const char *string);
+_SB_DEFINE_2(char, char c);
+_SB_DEFINE_2(long, long num);
+_SB_DEFINE_2(file, FILE *file);
+_SB_DEFINE_2(filepath, const char *path);
+_SB_DEFINE_2(vsprintf, const char *fmt, va_list ap);
+_SB_DEFINE_2(sprintf, const char *fmt, ...);
+
+#undef _SB_DEFINE_2
+
+#ifndef STRING_BUF_C
+#undef _RAW_BUF_ARGS
+#undef _SB_HEAD
+#undef _SB_RAW_HEAD
+#endif
+
+#endif /* STRING_BUF_H */