static char *print_string_ptr( const char *str )
static char *print_string_ptr(const char *str,printbuffer *p)
 {
	const char *ptr;char *ptr2,*out;int len=0,flag=0;unsigned char token;

	if (!str)
	{
		if (p)	out=ensure(p,3);
		else	out=(char*)cJSON_malloc(3);
		if (!out) return 0;
		strcpy(out,"\"\"");
		return out;
	}
 	
	for (ptr=str;*ptr;ptr++) flag|=((*ptr>0 && *ptr<32)||(*ptr=='\"')||(*ptr=='\\'))?1:0;
	if (!flag)
	{
		len=ptr-str;
		if (p) out=ensure(p,len+3);
		else		out=(char*)cJSON_malloc(len+3);
		if (!out) return 0;
		ptr2=out;*ptr2++='\"';
		strcpy(ptr2,str);
		ptr2[len]='\"';
		ptr2[len+1]=0;
		return out;
 	}
 	
	ptr=str;while ((token=*ptr) && ++len) {if (strchr("\"\\\b\f\n\r\t",token)) len++; else if (token<32) len+=5;ptr++;}
	
	if (p)	out=ensure(p,len+3);
	else	out=(char*)cJSON_malloc(len+3);
	if (!out) return 0;

	ptr2=out;ptr=str;
	*ptr2++='\"';
	while (*ptr)
	{
		if ((unsigned char)*ptr>31 && *ptr!='\"' && *ptr!='\\') *ptr2++=*ptr++;
		else
		{
			*ptr2++='\\';
			switch (token=*ptr++)
			{
				case '\\':	*ptr2++='\\';	break;
				case '\"':	*ptr2++='\"';	break;
				case '\b':	*ptr2++='b';	break;
				case '\f':	*ptr2++='f';	break;
				case '\n':	*ptr2++='n';	break;
				case '\r':	*ptr2++='r';	break;
				case '\t':	*ptr2++='t';	break;
				default: sprintf(ptr2,"u%04x",token);ptr2+=5;	break;	/* escape and print */
 			}
 		}
 	}
	*ptr2++='\"';*ptr2++=0;
 	return out;
 }

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.