netparse.h

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/*
 *  Openmysee
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
 #ifndef _NETPARSE_H__
#define _NETPARSE_H__

typedef struct stream
{
	stream() : size(0), p(NULL), end(NULL), data(NULL) {};
	~stream(){ if(data){ free(data); data=NULL; } }
	unsigned char *p; //pointer of current read position
	unsigned char *end;
	unsigned char *data;
	unsigned int size;
} STREAM, *PSTREAM;

#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, (uint16)((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 next_be(s,v)		v = ((v) << 8) + *((s)->p++);
#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; }


#endif