X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=lib%2Fjson.c;h=d162fd5143bfc9e8cd3994007655c46ccca989f8;hb=45a7de56bbcb2adfabf2082b1133e768777d44d6;hp=cdcfba598374ba9b59466f8f91764594010107f8;hpb=58fda1dab104041fc693032475ec4662c1a52849;p=openvswitch

diff --git a/lib/json.c b/lib/json.c
index cdcfba59..d162fd51 100644
--- a/lib/json.c
+++ b/lib/json.c
@@ -99,6 +99,9 @@ struct json_parser {
     /* Lexical analysis. */
     enum json_lex_state lex_state;
     struct ds buffer;           /* Buffer for accumulating token text. */
+    int line_number;
+    int column_number;
+    int byte_number;
 
     /* Parsing. */
     enum json_parse_state parse_state;
@@ -219,6 +222,14 @@ json_array_create(struct json **elements, size_t n)
     return json;
 }
 
+struct json *
+json_array_create_1(struct json *elem0)
+{
+    struct json **elems = xmalloc(sizeof *elems);
+    elems[0] = elem0;
+    return json_array_create(elems, 1);
+}
+
 struct json *
 json_array_create_2(struct json *elem0, struct json *elem1)
 {
@@ -869,10 +880,18 @@ exit:
 }
 
 static bool
-json_lex_input(struct json_parser *p, int c)
+json_lex_input(struct json_parser *p, unsigned char c)
 {
     struct json_token token;
 
+    p->byte_number++;
+    if (c == '\n') {
+        p->column_number = 0;
+        p->line_number++;
+    } else {
+        p->column_number++;
+    }
+
     switch (p->lex_state) {
     case JSON_LEX_START:
         switch (c) {
@@ -1340,12 +1359,18 @@ static void
 json_error(struct json_parser *p, const char *format, ...)
 {
     if (!p->error) {
+        struct ds msg;
         va_list args;
 
+        ds_init(&msg);
+        ds_put_format(&msg, "line %d, column %d, byte %d: ",
+                      p->line_number, p->column_number, p->byte_number);
         va_start(args, format);
-        p->error = xvasprintf(format, args);
+        ds_put_format_valist(&msg, format, args);
         va_end(args);
 
+        p->error = ds_steal_cstr(&msg);
+
         p->done = true;
     }
 }