Initial revision

util/cpp/expr.c

@@ -0,0 +1,53 @@
+/* OPERATOR HANDLING */
+
+#include	"Lpars.h"
+
+int
+rank_of(oper)
+	int oper;
+{
+	/*	The rank of the operator oper is returned.
+	*/
+	switch (oper)	{
+	default:
+		return 0;
+	case '(':
+		return 1;
+	case '!':
+		return 2;
+	case '*':
+	case '/':
+	case '%':
+		return 3;
+	case '+':
+	case '-':
+		return 4;
+	case LEFT:
+	case RIGHT:
+		return 5;
+	case '<':
+	case '>':
+	case LESSEQ:
+	case GREATEREQ:
+		return 6;
+	case EQUAL:
+	case NOTEQUAL:
+		return 7;
+	case '&':
+		return 8;
+	case '^':
+		return 9;
+	case '|':
+		return 10;
+	case AND:
+		return 11;
+	case OR:
+		return 12;
+	case '?':
+	case ':':
+		return 13;
+	case ',':
+		return 15;
+	}
+	/*NOTREACHED*/
+}