1 files changed, 66 insertions, 0 deletions
diff --git a/utils/include/regexp.h b/utils/include/regexp.h
new file mode 100644
index 00000000..bcd06f3e
--- /dev/null
+++ b/utils/include/regexp.h
@@ -0,0 +1,66 @@
+#pragma	src	"/usr/inferno/libregexp"
+#pragma	lib	"libregexp.a"
+
+typedef struct Resub		Resub;
+typedef struct Reclass		Reclass;
+typedef struct Reinst		Reinst;
+typedef struct Reprog		Reprog;
+
+/*
+ *	Sub expression matches
+ */
+struct Resub{
+	union
+	{
+		char *sp;
+		Rune *rsp;
+	}s;
+	union
+	{
+		char *ep;
+		Rune *rep;
+	}e;
+};
+
+/*
+ *	character class, each pair of rune's defines a range
+ */
+struct Reclass{
+	Rune	*end;
+	Rune	spans[64];
+};
+
+/*
+ *	Machine instructions
+ */
+struct Reinst{
+	int	type;
+	union	{
+		Reclass	*cp;		/* class pointer */
+		Rune	r;		/* character */
+		int	subid;		/* sub-expression id for RBRA and LBRA */
+		Reinst	*right;		/* right child of OR */
+	}u1;
+	union {	/* regexp relies on these two being in the same union */
+		Reinst *left;		/* left child of OR */
+		Reinst *next;		/* next instruction for CAT & LBRA */
+	}u2;
+};
+
+/*
+ *	Reprogram definition
+ */
+struct Reprog{
+	Reinst	*startinst;	/* start pc */
+	Reclass	class[16];	/* .data */
+	Reinst	firstinst[5];	/* .text */
+};
+
+extern Reprog	*regcomp(char*);
+extern Reprog	*regcomplit(char*);
+extern Reprog	*regcompnl(char*);
+extern void	regerror(char*);
+extern int	regexec(Reprog*, char*, Resub*, int);
+extern void	regsub(char*, char*, Resub*, int);
+extern int	rregexec(Reprog*, Rune*, Resub*, int);
+extern void	rregsub(Rune*, Rune*, Resub*, int);