parson: support per-node customisation of serialisation of number

0001-parson-JSON-library-add-format-serialisation-of-number.patch

From 43c3b2c9d5388a8da1b433d42dd04b371921c9e2 Mon Sep 17 00:00:00 2001
From: james <james@localhost>
Date: Tue, 21 Feb 2017 04:18:37 +1000
Subject: [PATCH] parson JSON library - add format serialisation of numbers

---
 inc/parson.h |  2 ++
 src/parson.c | 16 ++++++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/inc/parson.h b/inc/parson.h
index e4cd21e..ca74cd5 100644
--- a/inc/parson.h
+++ b/inc/parson.h
@@ -143,6 +143,7 @@ int json_object_dothas_value_of_type(const JSON_Object *object, const char *name
 JSON_Status json_object_set_value(JSON_Object *object, const char *name, JSON_Value *value);
 JSON_Status json_object_set_string(JSON_Object *object, const char *name, const char *string);
 JSON_Status json_object_set_number(JSON_Object *object, const char *name, double number);
+JSON_Status json_object_set_number2(JSON_Object *object, const char *name, double number, const char *FloatFormat);
 JSON_Status json_object_set_boolean(JSON_Object *object, const char *name, int boolean);
 JSON_Status json_object_set_null(JSON_Object *object, const char *name);
 
@@ -206,6 +207,7 @@ JSON_Value * json_value_init_object (void);
 JSON_Value * json_value_init_array  (void);
 JSON_Value * json_value_init_string (const char *string); /* copies passed string */
 JSON_Value * json_value_init_number (double number);
+JSON_Value * json_value_init_number2(double number, const char *FloatFormat);
 JSON_Value * json_value_init_boolean(int boolean);
 JSON_Value * json_value_init_null   (void);
 JSON_Value * json_value_deep_copy   (const JSON_Value *value);
diff --git a/src/parson.c b/src/parson.c
index b914ae8..91990e6 100644
--- a/src/parson.c
+++ b/src/parson.c
@@ -68,6 +68,7 @@ struct json_value_t {
     JSON_Value      *parent;
     JSON_Value_Type  type;
     JSON_Value_Value value;
+    const char      *number_format;
 };
 
 struct json_object_t {
@@ -890,7 +891,9 @@ static int json_serialize_to_buffer_r(const JSON_Value *value, char *buf, int le
 	    } else if (num == ((double)(unsigned int)num)) {
                 written = sprintf(num_buf, "%u", (unsigned int)num);
             } else {
-                written = sprintf(num_buf, DOUBLE_SERIALIZATION_FORMAT, num);
+                const char *fmt = value->number_format;
+                if (!fmt) fmt = DOUBLE_SERIALIZATION_FORMAT;
+                written = sprintf(num_buf, fmt, num);
             }
             if (written < 0) {
                 return -1;
@@ -1270,7 +1273,7 @@ JSON_Value * json_value_init_string(const char *string) {
     return value;
 }
 
-JSON_Value * json_value_init_number(double number) {
+JSON_Value * json_value_init_number2(double number, const char *FloatFormat) {
     JSON_Value *new_value = (JSON_Value*)parson_malloc(sizeof(JSON_Value));
     if (!new_value) {
         return NULL;
@@ -1278,9 +1281,14 @@ JSON_Value * json_value_init_number(double number) {
     new_value->parent = NULL;
     new_value->type = JSONNumber;
     new_value->value.number = number;
+    new_value->number_format = FloatFormat;
     return new_value;
 }
 
+JSON_Value * json_value_init_number(double number) {
+	return json_value_init_number2(number, NULL);
+}
+
 JSON_Value * json_value_init_boolean(int boolean) {
     JSON_Value *new_value = (JSON_Value*)parson_malloc(sizeof(JSON_Value));
     if (!new_value) {
@@ -1678,6 +1686,10 @@ JSON_Status json_object_set_number(JSON_Object *object, const char *name, double
     return json_object_set_value(object, name, json_value_init_number(number));
 }
 
+JSON_Status json_object_set_number2(JSON_Object *object, const char *name, double number, const char *FloatFormat) {
+    return json_object_set_value(object, name, json_value_init_number2(number, FloatFormat));
+}
+
 JSON_Status json_object_set_boolean(JSON_Object *object, const char *name, int boolean) {
     return json_object_set_value(object, name, json_value_init_boolean(boolean));
 }
-- 
2.7.0