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https://github.com/DaveGamble/cJSON.git
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cJSON_Parse{,WithOpts}: Skip UTF-8 (Byte Order Marks)
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parent
b26e71f960
commit
5baa77f86c
19
cJSON.c
19
cJSON.c
@ -958,6 +958,22 @@ static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
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return buffer;
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}
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/* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */
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static parse_buffer *skip_utf8_bom(parse_buffer * const buffer)
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{
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if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0))
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{
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return NULL;
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}
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if (can_access_at_index(buffer, 4) && (strncmp((const char*)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0))
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{
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buffer->offset += 3;
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}
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return buffer;
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}
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/* Parse an object - create a new root, and populate. */
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CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
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{
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@ -984,7 +1000,7 @@ CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return
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goto fail;
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}
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if (!parse_value(item, buffer_skip_whitespace(&buffer)))
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if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer))))
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{
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/* parse failure. ep is set. */
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goto fail;
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@ -1222,7 +1238,6 @@ static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buf
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return parse_object(item, input_buffer);
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}
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return false;
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}
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@ -410,6 +410,30 @@ static void cjson_functions_shouldnt_crash_with_null_pointers(void)
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cJSON_Delete(item);
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}
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static void skip_utf8_bom_should_skip_bom(void)
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{
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const unsigned char string[] = "\xEF\xBB\xBF{}";
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parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } };
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buffer.content = string;
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buffer.length = sizeof(string);
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buffer.hooks = global_hooks;
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TEST_ASSERT_TRUE(skip_utf8_bom(&buffer) == &buffer);
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TEST_ASSERT_EQUAL_UINT(3U, (unsigned int)buffer.offset);
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}
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static void skip_utf8_bom_should_not_skip_bom_if_not_at_beginning(void)
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{
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const unsigned char string[] = " \xEF\xBB\xBF{}";
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parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } };
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buffer.content = string;
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buffer.length = sizeof(string);
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buffer.hooks = global_hooks;
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buffer.offset = 1;
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TEST_ASSERT_NULL(skip_utf8_bom(&buffer));
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}
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int main(void)
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{
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UNITY_BEGIN();
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@ -425,6 +449,8 @@ int main(void)
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RUN_TEST(cjson_replace_item_via_pointer_should_replace_items);
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RUN_TEST(cjson_replace_item_in_object_should_preserve_name);
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RUN_TEST(cjson_functions_shouldnt_crash_with_null_pointers);
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RUN_TEST(skip_utf8_bom_should_skip_bom);
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RUN_TEST(skip_utf8_bom_should_not_skip_bom_if_not_at_beginning);
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return UNITY_END();
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}
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@ -69,6 +69,22 @@ static void parse_with_opts_should_return_parse_end(void)
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cJSON_Delete(item);
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}
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static void parse_with_opts_should_parse_utf8_bom(void)
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{
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cJSON *with_bom = NULL;
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cJSON *without_bom = NULL;
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with_bom = cJSON_ParseWithOpts("\xEF\xBB\xBF{}", NULL, true);
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TEST_ASSERT_NOT_NULL(with_bom);
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without_bom = cJSON_ParseWithOpts("{}", NULL, true);
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TEST_ASSERT_NOT_NULL(with_bom);
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TEST_ASSERT_TRUE(cJSON_Compare(with_bom, without_bom, true));
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cJSON_Delete(with_bom);
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cJSON_Delete(without_bom);
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}
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int main(void)
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{
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UNITY_BEGIN();
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@ -77,6 +93,7 @@ int main(void)
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RUN_TEST(parse_with_opts_should_handle_empty_strings);
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RUN_TEST(parse_with_opts_should_require_null_if_requested);
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RUN_TEST(parse_with_opts_should_return_parse_end);
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RUN_TEST(parse_with_opts_should_parse_utf8_bom);
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return UNITY_END();
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}
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