cJSON_ConfigurationChangeParseEnd

Add a pointer to an end position of parsing to the cJSON_Configuration
object. (Essentially like return_parse_end, but as offset instead of
pointer).

cJSON.c

@@ -128,6 +128,7 @@ typedef struct internal_configuration
     cJSON_bool case_sensitive;
     cJSON_Allocators allocators;
     void *userdata;
+    size_t *end_position;
 } internal_configuration;
 
 #if defined(_MSC_VER)
@@ -192,7 +193,8 @@ static void deallocate(const internal_configuration * const configuration, void
         global_deallocate_wrapper,\
         global_reallocate_wrapper\
     },\
-    NULL /* no userdata */\
+    NULL, /* no userdata */\
+    NULL /* no end position */\
 }
 
 /* this is necessary to assign the default configuration after initialization */
@@ -1058,7 +1060,7 @@ static parse_buffer *skip_utf8_bom(parse_buffer * const buffer)
 }
 
 /* Parse an object - create a new root, and populate. */
-static cJSON *parse(const char * const json, const internal_configuration * const configuration, size_t *end_position)
+static cJSON *parse(const char * const json, const internal_configuration * const configuration)
 {
     parse_buffer buffer = { 0, 0, 0, 0, default_configuration };
     cJSON *item = NULL;
@@ -1097,7 +1099,10 @@ static cJSON *parse(const char * const json, const internal_configuration * cons
             goto fail;
         }
     }
-    *end_position = buffer.offset;
+    if (configuration->end_position != NULL)
+    {
+        *configuration->end_position = buffer.offset;
+    }
 
     return item;
 
@@ -1122,7 +1127,10 @@ fail:
             local_error.position = buffer.length - 1;
         }
 
-        *end_position = local_error.position;
+        if (configuration->end_position != NULL)
+        {
+            *configuration->end_position = local_error.position;
+        }
         global_error = local_error;
     }
 
@@ -1137,7 +1145,8 @@ CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *json, const char **return_
     cJSON *item = NULL;
 
     configuration.allow_data_after_json = !require_null_terminated;
-    item = parse(json, &configuration, &end_position);
+    configuration.end_position = &end_position;
+    item = parse(json, &configuration);
 
     if (return_parse_end != NULL)
     {
@@ -1150,8 +1159,7 @@ CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *json, const char **return_
 /* Default options for cJSON_Parse */
 CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *json)
 {
-    size_t end_position = 0;
-    return parse(json, &global_configuration, &end_position);
+    return parse(json, &global_configuration);
 }
 
 #define cjson_min(a, b) (((a) < (b)) ? (a) : (b))
@@ -3012,6 +3020,17 @@ CJSON_PUBLIC(cJSON_Configuration) cJSON_ConfigurationChangeUserdata(cJSON_Config
     return configuration;
 }
 
+CJSON_PUBLIC(cJSON_Configuration) cJSON_ConfigurationChangeParseEnd(cJSON_Configuration configuration, size_t * const parse_end)
+{
+    if (configuration == NULL)
+    {
+        return NULL;
+    }
+
+    ((internal_configuration*)configuration)->end_position = parse_end;
+    return configuration;
+}
+
 static cJSON_bool compare(const cJSON * const a, const cJSON * const b, const internal_configuration * const configuration)
 {
     if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF)) || cJSON_IsInvalid(a))

cJSON.h

@@ -179,6 +179,8 @@ CJSON_PUBLIC(cJSON_Configuration) cJSON_CreateConfiguration(const cJSON * const
 CJSON_PUBLIC(cJSON_Configuration) cJSON_ConfigurationChangeAllocators(cJSON_Configuration configuration, const cJSON_Allocators allocators);
 /* Change the allocator userdata attached to a cJSON_Configuration */
 CJSON_PUBLIC(cJSON_Configuration) cJSON_ConfigurationChangeUserdata(cJSON_Configuration configuration, void *userdata);
+/* Change the pointer where the end of parsing is written to */
+CJSON_PUBLIC(cJSON_Configuration) cJSON_ConfigurationChangeParseEnd(cJSON_Configuration configuration, size_t * const parse_end);
 
 /* Supply malloc and free functions to cJSON globally */
 CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks);

tests/configuration_tests.c

@@ -129,6 +129,20 @@ static void configuration_change_userdata_should_change_userdata(void)
     free(configuration);
 }
 
+static void configuration_change_parse_end_should_change_parse_end(void)
+{
+    size_t end_position = 0;
+    internal_configuration *configuration = (internal_configuration*)cJSON_CreateConfiguration(NULL, NULL, NULL);
+    TEST_ASSERT_NOT_NULL(configuration);
+
+    configuration = (internal_configuration*)cJSON_ConfigurationChangeParseEnd(configuration, &end_position);
+    TEST_ASSERT_NOT_NULL(configuration);
+
+    TEST_ASSERT_TRUE_MESSAGE(configuration->end_position == &end_position, "Failed to set parse end.");
+
+    free(configuration);
+}
+
 int main(void)
 {
     UNITY_BEGIN();
@@ -138,6 +152,7 @@ int main(void)
     RUN_TEST(create_configuration_should_take_custom_allocators);
     RUN_TEST(configuration_change_allocators_should_change_allocators);
     RUN_TEST(configuration_change_userdata_should_change_userdata);
+    RUN_TEST(configuration_change_parse_end_should_change_parse_end);
 
     return UNITY_END();
 }

tests/misc_tests.c

@@ -419,7 +419,7 @@ static void *failing_realloc(void *pointer, size_t size, void *userdata)
 
 static void ensure_should_fail_on_failed_realloc(void)
 {
-    printbuffer buffer = {NULL, 10, 0, 0, false, {256, false, true, true, {global_allocate_wrapper, global_deallocate_wrapper, failing_realloc}, NULL } };
+    printbuffer buffer = {NULL, 10, 0, 0, false, {256, false, true, true, {global_allocate_wrapper, global_deallocate_wrapper, failing_realloc}, NULL, NULL } };
     buffer.configuration.userdata = &buffer;
     buffer.buffer = (unsigned char*)malloc(100);
     TEST_ASSERT_NOT_NULL(buffer.buffer);