--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/irc_line.h	Sat Feb 28 21:39:15 2009 +0200
@@ -0,0 +1,47 @@
+#ifndef IRC_LINE_H
+#define IRC_LINE_H
+
+#include "error.h"
+
+/*
+ * The maximum length of a line, including terminating CRLF
+ */
+#define IRC_LINE_MAX 512
+
+/*
+ * The maximum number of arguments for a single command
+ */
+#define IRC_ARG_MAX 15
+
+/*
+ * Chars that are invalid inside of tokens
+ */
+#define IRC_TOKEN_INVALID "\r\n\n "
+#define IRC_TOKEN_TRAILING_INVALID "\r\n\n"
+
+/*
+ * Low-level IRC protocol unit is a line with its bits
+ */
+struct irc_line {
+    /* The message source, either a server name or a nickmask */
+    const char *prefix;
+
+    /* The command, either a numeric or a primary command */
+    const char *command;
+
+    /* The arguments, with unused ones set to NULL */
+    const char *args[IRC_ARG_MAX];
+};
+
+/*
+ * Parse an IRC message to fill in an irc_line. This mutates the value of data (to insert NULs between tokens), and
+ * stores pointers into this data into the irc_line.
+ */
+err_t irc_line_parse (struct irc_line *line, char *data);
+
+/*
+ * Formats an irc_line as a protocol line into the given buffer (which should hold at least IRC_LINE_MAX bytes).
+ */
+err_t irc_line_build (const struct irc_line *line, char *buf);
+
+#endif /* IRC_LINE_H */