From 9979c70b1fa5238a09902d9a61f1a19e2675a039 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 7 Feb 2014 17:02:33 -0800
Subject: [PATCH] Add the whole-tree reader

---
 jsoncat.c  | 26 +++++++++++++++++++++++---
 jsonpull.c | 16 ++++++++++++++++
 2 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/jsoncat.c b/jsoncat.c
index d3f3b8d0..e5a5e6dd 100644
--- a/jsoncat.c
+++ b/jsoncat.c
@@ -122,7 +122,7 @@ void process_callback(FILE *f, char *fname) {
 	}
 }
 
-void process(FILE *f, char *fname) {
+void process_incremental(FILE *f, char *fname) {
 	json_pull *jp = json_begin_file(f);
 	json_object *j;
 
@@ -139,9 +139,29 @@ void process(FILE *f, char *fname) {
 	}
 }
 
+void process_tree(FILE *f, char *fname) {
+	json_pull *jp = json_begin_file(f);
+
+	while (1) {
+		json_object *j = json_read_tree(jp);
+
+		if (j == NULL) {
+			if (jp->error != NULL) {
+				fprintf(stderr, "%s: %d: %s\n", fname, jp->line, jp->error);
+			}
+
+			break;
+		}
+
+		json_print(j, 0);
+		json_free(j);
+		printf("\n");
+	}
+}
+
 int main(int argc, char **argv) {
 	if (argc == 1) {
-		process(stdin, "standard input");
+		process_tree(stdin, "standard input");
 	} else {
 		int i;
 		for (i = 1; i < argc; i++) {
@@ -150,7 +170,7 @@ int main(int argc, char **argv) {
 				perror(argv[i]);
 				exit(EXIT_FAILURE);
 			}
-			process(f, argv[i]);
+			process_tree(f, argv[i]);
 			fclose(f);
 		}
 	}
diff --git a/jsonpull.c b/jsonpull.c
index aa2c8ed8..8a62019b 100644
--- a/jsonpull.c
+++ b/jsonpull.c
@@ -55,6 +55,10 @@ json_pull *json_begin_string(char *s) {
 	return json_begin(read_string, peek_string, s);
 }
 
+void json_end(json_pull *p) {
+	free(p);
+}
+
 static int read_wrap(json_pull *j) {
 	int c = j->read(j);
 
@@ -475,6 +479,18 @@ json_object *json_read(json_pull *j) {
 	return json_read_with_separators(j, NULL, NULL);
 }
 
+json_object *json_read_tree(json_pull *p) {
+	json_object *j;
+
+	while ((j = json_read(p)) != NULL) {
+		if (j->parent == NULL) {
+			return j;
+		}
+	}
+
+	return NULL;
+}
+
 void json_free(json_object *o) {
 	int i;