r3_tree_dump can now optionally dump to a string. Fixes #15

include/r3.h

@@ -118,7 +118,7 @@ node * r3_tree_insert_pathl(node *tree, char *path, int path_len, void * data);
  */
 node * _r3_tree_insert_pathl(node *tree, char *path, int path_len, route * route, void * data);
 
-void r3_tree_dump(node * n, int level);
+void r3_tree_dump(node * n, int level, char *out);
 
 int r3_tree_render_file(node * tree, char * format, char * filename);
 

include/r3_str.h

@@ -32,7 +32,7 @@ char** str_split(char* a_str, const char a_delim);
 
 void str_repeat(char *s, char *c, int len);
 
-void print_indent(int level);
+void print_indent(int level, char *out);
 
 #ifndef HAVE_STRDUP
 char *strdup(const char *s);

src/node.c

@@ -501,8 +501,36 @@ bool r3_node_has_slug_edges(node *n) {
 
 
 
-void r3_tree_dump(node * n, int level) {
+void r3_tree_dump(node * n, int level, char *out) {
-    print_indent(level);
+    if (out)
+    {
+	    print_indent(level, out);
+	    if ( n->combined_pattern ) {
+		sprintf(out, " regexp:%s", n->combined_pattern);
+	    }
+
+	    sprintf(out, " endpoint:%d", n->endpoint);
+
+	    if (n->data) {
+		sprintf(out, " data:%p", n->data);
+	    }
+	    sprintf(out, "\n");
+
+	    for ( int i = 0 ; i < n->edge_len ; i++ ) {
+		edge * e = n->edges[i];
+		print_indent(level + 1, out);
+		sprintf(out, "|-\"%s\"", e->pattern);
+
+		if ( e->child ) {
+		    sprintf(out, "\n");
+		    r3_tree_dump(e->child, level + 1, out);
+		}
+		sprintf(out, "\n");
+	    }
+    }
+    else
+    {
+	    print_indent(level, out);
 	    if ( n->combined_pattern ) {
 		printf(" regexp:%s", n->combined_pattern);
 	    }
@@ -516,16 +544,17 @@ void r3_tree_dump(node * n, int level) {
 
 	    for ( int i = 0 ; i < n->edge_len ; i++ ) {
 		edge * e = n->edges[i];
-        print_indent(level + 1);
+		print_indent(level + 1, out);
 		printf("|-\"%s\"", e->pattern);
 
 		if ( e->child ) {
 		    printf("\n");
-            r3_tree_dump( e->child, level + 1);
+		    r3_tree_dump(e->child, level + 1, out);
 		}
 		printf("\n");
 	    }
 	}
+}
 
 
 /**

src/str.c

@@ -248,9 +248,15 @@ void str_repeat(char *s, char *c, int len) {
     }
 }
 
-void print_indent(int level) {
+void print_indent(int level, char *out) {
     int len = level * 2;
+    if (out) {
     	while(len--) {
+        	sprintf(out, " ");
+	}
+    }
+    else
+    {
 		printf(" ");
     }
 }