cJSON memory leak

Question

I use cJSON in my program to convert my values to JSON and write it to file. Here is the example of my code:

void writeStructToFile(IOPipe this, struct struc         


        

Answer 1

Initially I thought that it might be FILE I/O's internal buffers. But these are flushed automatically when they become too big.

The real leak is that cJSON_Print allocates memory: a char array. You must free this after you're done:

char* text = cJSON_Print(jout);
fprintf(this->outstream, "%s", text);
free(text);  // As suggested by PaulPonomarev.

cJSON_Delete(jout);

Answer 2

For a char* allocated cJSON_Print, it is said to use cJSON_FreePrintBuffer.