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来自「IP网络语音通讯软件源代码. 不可多得的语音源代码」· 代码 · 共 35 行

#
# DES SECTION
#
deschar *	T_DESCHARP
des_cblock *	T_CBLOCK
des_cblock	T_CBLOCK
des_key_schedule	T_SCHEDULE
des_key_schedule *	T_SCHEDULE

INPUT
T_CBLOCK
	$var=(des_cblock *)SvPV($arg,len);
	if (len < DES_KEY_SZ)
		{
		croak(\"$var needs to be at least %u bytes long\",DES_KEY_SZ);
		}

T_SCHEDULE
	$var=(des_key_schedule *)SvPV($arg,len);
	if (len < DES_SCHEDULE_SZ)
		{
		croak(\"$var needs to be at least %u bytes long\",
			DES_SCHEDULE_SZ);
		}

OUTPUT
T_CBLOCK
	sv_setpvn($arg,(char *)$var,DES_KEY_SZ);

T_SCHEDULE
	sv_setpvn($arg,(char *)$var,DES_SCHEDULE_SZ);

T_DESCHARP
	sv_setpvn($arg,(char *)$var,len);