refactor enum handling

src/set.c

@@ -109,34 +109,33 @@ decimal_digits(int n)
 
 VCL_VOID
 vmod_set__init(VRT_CTX, struct vmod_re2_set **setp, const char *vcl_name,
-	       VCL_ENUM anchor, VCL_BOOL utf8, VCL_BOOL posix_syntax,
+	       VCL_ENUM anchor_a, VCL_BOOL utf8, VCL_BOOL posix_syntax,
 	       VCL_BOOL longest_match, VCL_INT max_mem, VCL_BOOL literal,
 	       VCL_BOOL never_nl, VCL_BOOL dot_nl, VCL_BOOL case_sensitive,
 	       VCL_BOOL perl_classes, VCL_BOOL word_boundary, VCL_BOOL one_line)
 {
 	struct vmod_re2_set *set;
-	anchor_e anchor_e;
+	anchor_e anchor;
 	const char *err;
 
 	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
 	AN(setp);
 	AZ(*setp);
 	AN(vcl_name);
-	AN(anchor);
 	ALLOC_OBJ(set, VMOD_RE2_SET_MAGIC);
 	AN(set);
 	*setp = set;
 
-	if (strcmp(anchor, "none") == 0)
-		anchor_e = NONE;
-	else if (strcmp(anchor, "start") == 0)
-		anchor_e = START;
-	else if (strcmp(anchor, "both") == 0)
-		anchor_e = BOTH;
+	if (anchor_a == VENUM(none))
+		anchor = NONE;
+	else if (anchor_a == VENUM(start))
+		anchor = START;
+	else if (anchor_a == VENUM(both))
+		anchor = BOTH;
 	else
 		WRONG("illegal anchor");
 
-	if ((err = vre2set_init(&set->set, anchor_e, utf8, posix_syntax,
+	if ((err = vre2set_init(&set->set, anchor, utf8, posix_syntax,
 				longest_match, max_mem, literal, never_nl,
 				dot_nl, case_sensitive, perl_classes,
 				word_boundary, one_line))