Function __system_initArgv

libctru/source/system/initArgv.c:16–63

extern char* fake_heap_end;

void __attribute__((weak)) __system_initArgv(void)
{
	int i;
	const char* arglist = envGetSystemArgList();
	const char* temp = arglist;

	// Check if the argument list is present
	if (!temp)
		return;

	// Retrieve argc
	__system_argc = *(u32*)temp;
	temp += sizeof(u32);

	// Find the end of the argument data
	for (i = 0; i < __system_argc; i ++)
	{
		for (; *temp; temp ++);
		temp ++;
	}

	// Reserve heap memory for argv data
	u32 argSize = temp - arglist - sizeof(u32);
	__system_argv = (char**)fake_heap_start;
	fake_heap_start += sizeof(char**)*(__system_argc + 1);
	char* argCopy = fake_heap_start;
	fake_heap_start += argSize;

	// Fill argv array
	memcpy(argCopy, &arglist[4], argSize);
	temp = argCopy;
	for (i = 0; i < __system_argc; i ++)
	{
		__system_argv[i] = (char*)temp;
		for (; *temp; temp ++);
		temp ++;
	}

	// Grab 3dslink host address if avaliable
	if ( __system_argc > 1 &&
         strlen(__system_argv[__system_argc - 1]) == 17 &&
         strncmp(&__system_argv[__system_argc - 1][8], "_3DSLINK_", 8) == 0 )
	{
		__system_argc--;
		__3dslink_host.s_addr = strtoul(__system_argv[__system_argc], NULL, 16);
	}
	__system_argv[__system_argc] = NULL;
}