Function print_string_ptr

outofcore/src/cJSON.cpp:204–237

Render the cstring provided to an escaped version that can be printed. */

/* Render the cstring provided to an escaped version that can be printed. */
static char *print_string_ptr(const char *str)
{
	const char *ptr;char *ptr2,*out;int len=0;unsigned char token;
	
	if (!str) return cJSON_strdup("");
	ptr=str;while ((token=*ptr) && ++len) {if (strchr("\"\\\b\f\n\r\t",token)) len++; else if (token<32) len+=5;ptr++;}
	
	out=static_cast<char*>(cJSON_malloc(len+3));
	if (!out) return nullptr;

	ptr2=out;ptr=str;
	*ptr2++='\"';
	while (*ptr)
	{
		if (static_cast<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;
}
/* Invote print_string_ptr (which is useful) on an item. */
static char *print_string(cJSON *item)	{return print_string_ptr(item->valuestring);}