/*   rdesktop: A Remote Desktop Protocol client.   Parsing primitives   Copyright (C) Matthew Chapman 1999-2005      This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2 of the License, or   (at your option) any later version.      This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.      You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.*//* Parser state */typedef struct stream{	unsigned char *p;	unsigned char *end;	unsigned char *data;	unsigned int size;	/* Offsets of various headers */	unsigned char *iso_hdr;	unsigned char *mcs_hdr;	unsigned char *sec_hdr;	unsigned char *rdp_hdr;	unsigned char *channel_hdr;} *STREAM;#define s_push_layer(s,h,n)	{ (s)->h = (s)->p; (s)->p += n; }#define s_pop_layer(s,h)	(s)->p = (s)->h;#define s_mark_end(s)		(s)->end = (s)->p;#define s_check(s)		((s)->p <= (s)->end)#define s_check_rem(s,n)	((s)->p + n <= (s)->end)#define s_check_end(s)		((s)->p == (s)->end)#if defined(L_ENDIAN) && !defined(NEED_ALIGN)#define in_uint16_le(s,v)	{ v = *(uint16 *)((s)->p); (s)->p += 2; }#define in_uint32_le(s,v)	{ v = *(uint32 *)((s)->p); (s)->p += 4; }#define out_uint16_le(s,v)	{ *(uint16 *)((s)->p) = v; (s)->p += 2; }#define out_uint32_le(s,v)	{ *(uint32 *)((s)->p) = v; (s)->p += 4; }#else#define in_uint16_le(s,v)	{ v = *((s)->p++); v += *((s)->p++) << 8; }#define in_uint32_le(s,v)	{ in_uint16_le(s,v) \				v += *((s)->p++) << 16; v += *((s)->p++) << 24; }#define out_uint16_le(s,v)	{ *((s)->p++) = (v) & 0xff; *((s)->p++) = ((v) >> 8) & 0xff; }#define out_uint32_le(s,v)	{ out_uint16_le(s, (v) & 0xffff); out_uint16_le(s, ((v) >> 16) & 0xffff); }#endif#if defined(B_ENDIAN) && !defined(NEED_ALIGN)#define in_uint16_be(s,v)	{ v = *(uint16 *)((s)->p); (s)->p += 2; }#define in_uint32_be(s,v)	{ v = *(uint32 *)((s)->p); (s)->p += 4; }#define out_uint16_be(s,v)	{ *(uint16 *)((s)->p) = v; (s)->p += 2; }#define out_uint32_be(s,v)	{ *(uint32 *)((s)->p) = v; (s)->p += 4; }#define B_ENDIAN_PREFERRED#define in_uint16(s,v)		in_uint16_be(s,v)#define in_uint32(s,v)		in_uint32_be(s,v)#define out_uint16(s,v)		out_uint16_be(s,v)#define out_uint32(s,v)		out_uint32_be(s,v)#else#define in_uint16_be(s,v)	{ v = *((s)->p++); next_be(s,v); }#define in_uint32_be(s,v)	{ in_uint16_be(s,v); next_be(s,v); next_be(s,v); }#define out_uint16_be(s,v)	{ *((s)->p++) = ((v) >> 8) & 0xff; *((s)->p++) = (v) & 0xff; }#define out_uint32_be(s,v)	{ out_uint16_be(s, ((v) >> 16) & 0xffff); out_uint16_be(s, (v) & 0xffff); }#endif#ifndef B_ENDIAN_PREFERRED#define in_uint16(s,v)		in_uint16_le(s,v)#define in_uint32(s,v)		in_uint32_le(s,v)#define out_uint16(s,v)		out_uint16_le(s,v)#define out_uint32(s,v)		out_uint32_le(s,v)#endif#define in_uint8(s,v)		v = *((s)->p++);#define in_uint8p(s,v,n)	{ v = (s)->p; (s)->p += n; }#define in_uint8a(s,v,n)	{ memcpy(v,(s)->p,n); (s)->p += n; }#define in_uint8s(s,n)		(s)->p += n;#define out_uint8(s,v)		*((s)->p++) = v;#define out_uint8p(s,v,n)	{ memcpy((s)->p,v,n); (s)->p += n; }#define out_uint8a(s,v,n)	out_uint8p(s,v,n);#define out_uint8s(s,n)		{ memset((s)->p,0,n); (s)->p += n; }#define next_be(s,v)		v = ((v) << 8) + *((s)->p++);