#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#include "json.h"
#include "printbuf.h"
static void do_benchmark(json_object *src1);
static const char *json_str1 =
"{"
" \"glossary\": {"
" \"title\": \"example glossary\","
" \"GlossDiv\": {"
" \"title\": \"S\","
" \"null_obj\": null, "
" \"GlossList\": {"
" \"GlossEntry\": {"
" \"ID\": \"SGML\","
" \"SortAs\": \"SGML\","
" \"GlossTerm\": \"Standard Generalized Markup Language\","
" \"Acronym\": \"SGML\","
" \"Abbrev\": \"ISO 8879:1986\","
" \"GlossDef\": {"
" \"para\": \"A meta-markup language, used to create markup languages such as DocBook.\","
" \"GlossSeeAlso\": [\"GML\", \"XML\"]"
" },"
" \"GlossSee\": \"markup\""
" }"
" }"
" }"
" }"
"}";
static const char *json_str2 =
"{\"menu\": {"
" \"header\": \"SVG Viewer\","
" \"items\": ["
" {\"id\": \"Open\"},"
" {\"id\": \"OpenNew\", \"label\": \"Open New\"},"
" null,"
" {\"id\": \"ZoomIn\", \"label\": \"Zoom In\"},"
" {\"id\": \"ZoomOut\", \"label\": \"Zoom Out\"},"
" {\"id\": \"OriginalView\", \"label\": \"Original View\"},"
" null,"
" {\"id\": \"Quality\", \"another_null\": null},"
" {\"id\": \"Pause\"},"
" {\"id\": \"Mute\"},"
" null,"
" {\"id\": \"Find\", \"label\": \"Find...\"},"
" {\"id\": \"FindAgain\", \"label\": \"Find Again\"},"
" {\"id\": \"Copy\"},"
" {\"id\": \"CopyAgain\", \"label\": \"Copy Again\"},"
" {\"id\": \"CopySVG\", \"label\": \"Copy SVG\"},"
" {\"id\": \"ViewSVG\", \"label\": \"View SVG\"},"
" {\"id\": \"ViewSource\", \"label\": \"View Source\"},"
" {\"id\": \"SaveAs\", \"label\": \"Save As\"},"
" null,"
" {\"id\": \"Help\"},"
" {\"id\": \"About\", \"label\": \"About Adobe CVG Viewer...\"}"
" ]"
"}}";
static const char *json_str3 =
"{\"menu\": {"
" \"id\": \"file\","
" \"value\": \"File\","
" \"popup\": {"
" \"menuitem\": ["
" {\"value\": \"New\", \"onclick\": \"CreateNewDoc()\"},"
" {\"value\": \"Open\", \"onclick\": \"OpenDoc()\"},"
" {\"value\": \"Close\", \"onclick\": \"CloseDoc()\"}"
" ]"
" }"
"}}";
json_object_to_json_string_fn my_custom_serializer;
int my_custom_serializer(struct json_object *jso, struct printbuf *pb, int level, int flags)
{
sprintbuf(pb, "OTHER");
return 0;
}
json_c_shallow_copy_fn my_shallow_copy;
int my_shallow_copy(json_object *src, json_object *parent, const char *key, size_t index, json_object **dst)
{
int rc;
rc = json_c_shallow_copy_default(src, parent, key, index, dst);
if (rc < 0)
return rc;
if (key != NULL && strcmp(key, "with_serializer") == 0)
{
printf("CALLED: my_shallow_copy on with_serializer object\n");
void *userdata = json_object_get_userdata(src);
json_object_set_serializer(*dst, my_custom_serializer, userdata, NULL);
return 2;
}
return rc;
}
int main(int argc, char **argv)
{
struct json_object *src1, *src2, *src3;
struct json_object *dst1 = NULL, *dst2 = NULL, *dst3 = NULL;
int benchmark = 0;
if (argc > 1 && strcmp(argv[1], "--benchmark") == 0)
{
benchmark = 1;
}
src1 = json_tokener_parse(json_str1);
src2 = json_tokener_parse(json_str2);
src3 = json_tokener_parse(json_str3);
assert(src1 != NULL);
assert(src1 != NULL);
assert(src3 != NULL);
printf("PASSED - loaded input data\n");
/* do this 3 times to make sure overwriting it works */
assert(0 == json_object_deep_copy(src1, &dst1, NULL));
assert(0 == json_object_deep_copy(src2, &dst2, NULL));
assert(0 == json_object_deep_copy(src3, &dst3, NULL));
printf("PASSED - all json_object_deep_copy() returned succesful\n");
assert(-1 == json_object_deep_copy(src1, &dst1, NULL));
assert(errno == EINVAL);
assert(-1 == json_object_deep_copy(src2, &dst2, NULL));
assert(errno == EINVAL);
assert(-1 == json_object_deep_copy(src3, &dst3, NULL));
assert(errno == EINVAL);
printf("PASSED - all json_object_deep_copy() returned EINVAL for non-null pointer\n");
assert(1 == json_object_equal(src1, dst1));
assert(1 == json_object_equal(src2, dst2));
assert(1 == json_object_equal(src3, dst3));
printf("PASSED - all json_object_equal() tests returned succesful\n");
assert(0 == strcmp(json_object_to_json_string_ext(src1, JSON_C_TO_STRING_PRETTY),
json_object_to_json_string_ext(dst1, JSON_C_TO_STRING_PRETTY)));
assert(0 == strcmp(json_object_to_json_string_ext(src2, JSON_C_TO_STRING_PRETTY),
json_object_to_json_string_ext(dst2, JSON_C_TO_STRING_PRETTY)));
assert(0 == strcmp(json_object_to_json_string_ext(src3, JSON_C_TO_STRING_PRETTY),
json_object_to_json_string_ext(dst3, JSON_C_TO_STRING_PRETTY)));
printf("PASSED - comparison of string output\n");
json_object_get(dst1);
assert(-1 == json_object_deep_copy(src1, &dst1, NULL));
assert(errno == EINVAL);
json_object_put(dst1);
printf("PASSED - trying to overrwrite an object that has refcount > 1");
printf("\nPrinting JSON objects for visual inspection\n");
printf("------------------------------------------------\n");
printf(" JSON1\n");
printf("%s\n", json_object_to_json_string_ext(dst1, JSON_C_TO_STRING_PRETTY));
printf("------------------------------------------------\n");
printf("------------------------------------------------\n");
printf(" JSON2\n");
printf("%s\n", json_object_to_json_string_ext(dst2, JSON_C_TO_STRING_PRETTY));
printf("------------------------------------------------\n");
printf("------------------------------------------------\n");
printf(" JSON3\n");
printf("------------------------------------------------\n");
printf("%s\n", json_object_to_json_string_ext(dst3, JSON_C_TO_STRING_PRETTY));
printf("------------------------------------------------\n");
json_object_put(dst1);
json_object_put(dst2);
json_object_put(dst3);
printf("\nTesting deep_copy with a custom serializer set\n");
json_object *with_serializer = json_object_new_string("notemitted");
json_object_set_serializer(with_serializer, my_custom_serializer, "dummy userdata", NULL);
json_object_object_add(src1, "with_serializer", with_serializer);
dst1 = NULL;
/* With a custom serializer in use, a custom shallow_copy function must also be used */
assert(-1 == json_object_deep_copy(src1, &dst1, NULL));
assert(0 == json_object_deep_copy(src1, &dst1, my_shallow_copy));
json_object *dest_with_serializer = json_object_object_get(dst1, "with_serializer");
assert(dest_with_serializer != NULL);
char *dst_userdata = json_object_get_userdata(dest_with_serializer);
assert(strcmp(dst_userdata, "dummy userdata") == 0);
const char *special_output = json_object_to_json_string(dest_with_serializer);
assert(strcmp(special_output, "OTHER") == 0);
printf("\ndeep_copy with custom serializer worked OK.\n");
json_object_put(dst1);
if (benchmark)
{
do_benchmark(src2);
}
json_object_put(src1);
json_object_put(src2);
json_object_put(src3);
return 0;
}
static void do_benchmark(json_object *src2)
{
json_object *dst2 = NULL;
int ii;
/**
* The numbers that I got are:
* BENCHMARK - 1000000 iterations of 'dst2 = json_tokener_parse(json_object_get_string(src2))' took 71 seconds
* BENCHMARK - 1000000 iterations of 'json_object_deep_copy(src2, &dst2, NULL)' took 29 seconds
*/
int iterations = 1000000;
time_t start = time(NULL);
start = time(NULL);
for (ii = 0; ii < iterations; ii++) {
dst2 = json_tokener_parse(json_object_get_string(src2));
json_object_put(dst2);
}
printf("BENCHMARK - %d iterations of 'dst2 = json_tokener_parse(json_object_get_string(src2))' took %d seconds\n", iterations, (int)(time(NULL) - start));
start = time(NULL);
dst2 = NULL;
for (ii = 0; ii < iterations; ii++) {
json_object_deep_copy(src2, &dst2, NULL);
json_object_put(dst2);
dst2 = NULL;
}
printf("BENCHMARK - %d iterations of 'json_object_deep_copy(src2, &dst2, NULL)' took %d seconds\n", iterations, (int)(time(NULL) - start));
}