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function to print and compare to preallocated buffer

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This commit is contained in:
Kyle Chisholm 2016-11-28 03:21:15 -05:00 committed by Max Bruckner
parent 4d1dcaa160
commit 99896d879c
1 changed files with 57 additions and 0 deletions
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57
test.c
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@ -82,6 +82,63 @@ struct record
const char *country; const char *country;
}; };
/* Create a bunch of objects as demonstration. */
int print_preallocated(cJSON *root)
{
/* declarations */
char *out = NULL;
char *buf = NULL;
char *buf_fail = NULL;
int len = 0;
int len_fail = 0;
/* formatted print */
out = cJSON_Print(root);
/* create buffer to succeed */
/* the extra 64 bytes are in case a floating point value is printed */
len = strlen(out) + 64;
buf = malloc(len);
/* create buffer to fail */
len_fail = strlen(out);
buf_fail = malloc(len_fail);
/* Print to buffer */
if (cJSON_PrintPreallocated(root, buf, len, 1) != 0) {
printf("cJSON_PrintPreallocated failed!\n");
if (strcmp(out, buf) != 0) {
printf("cJSON_PrintPreallocated not the same as cJSON_Print!\n");
printf("cJSON_Print result:\n%s\n", out);
printf("cJSON_PrintPreallocated result:\n%s\n", buf);
}
free(out);
free(buf_fail);
free(buf);
return -1;
}
/* success */
printf("%s\n", buf);
/* force it to fail */
if (cJSON_PrintPreallocated(root, buf_fail, len_fail, 1) == 0) {
printf("cJSON_PrintPreallocated failed to show error with insufficient memory!\n");
printf("cJSON_Print result:\n%s\n", out);
printf("cJSON_PrintPreallocated result:\n%s\n", buf_fail);
free(out);
free(buf_fail);
free(buf);
return -1;
}
free(out);
free(buf_fail);
free(buf);
return 0;
}
/* Create a bunch of objects as demonstration. */ /* Create a bunch of objects as demonstration. */
void create_objects(void) void create_objects(void)
{ {