Added lpeg.h

Author: nickgammon

scripting/lpeg.h

@@ -0,0 +1,38 @@
+/*
+** $Id: lpeg.h,v 1.1 2009/12/23 16:15:36 roberto Exp $
+** LPeg - PEG pattern matching for Lua
+** Copyright 2009, Lua.org & PUC-Rio  (see 'lpeg.html' for license)
+** written by Roberto Ierusalimschy
+*/
+
+#ifndef lpeg_h
+#define lpeg_h
+
+#include "..\lua.h"
+
+
+#define KEYNEWPATT	"lpeg.newpf"
+
+
+/*
+** type of extension functions that define new "patterns" for LPEG
+** It should return the new current position or NULL if match fails
+*/
+typedef const char *(*PattFunc) (const char *s,  /* current position */
+                                 const char *e,  /* string end */
+                                 const char *o,  /* string start */
+                                 const void *ud);  /* user data */
+
+/*
+** function to create new patterns based on 'PattFunc' functions.
+** This function is available at *registry[KEYNEWPATT]. (Notice
+** the extra indirection; the userdata at the registry points to
+** a variable that points to the function. In ANSI C a void* cannot
+** point to a function.)
+*/
+typedef void (*Newpf) (lua_State *L,
+                       PattFunc f,  /* pattern */
+                       const void *ud,  /* (user) data to be passed to 'f' */
+                       size_t l);  /* size of data to be passed to 'f' */
+
+#endif