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deb-goldedplus/goldlib/gall/gmemi86.h

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2000-02-25 10:15:17 +00:00
// This may look like C code, but it is really -*- C++ -*-
// ------------------------------------------------------------------
// The Goldware Library
// Copyright (C) 1990-1999 Odinn Sorensen
// Copyright (C) 1999-2000 Alexander S. Aganichev
// ------------------------------------------------------------------
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library 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
// ------------------------------------------------------------------
// $Id$
// ------------------------------------------------------------------
// Intel 80x86 interrupt portable wrapper class.
// ------------------------------------------------------------------
#ifndef __gmemi86_h
#define __gmemi86_h
// ------------------------------------------------------------------
#if defined(__MSDOS__)
// ------------------------------------------------------------------
#include <dos.h>
#include <gdefs.h>
// ------------------------------------------------------------------
#if defined(__WATCOMC__)
#define GREGPACK REGPACK
#elif defined(__DJGPP__)
#include <dpmi.h>
#define GREGPACK __dpmi_regs
#elif defined(__BORLANDC__)
#define GREGPACK REGS
#else
#error not supported!
#endif
// ------------------------------------------------------------------
class i86 {
protected:
GREGPACK r;
#if defined(__BORLANDC__)
SREGS sr;
#endif
public:
inline uint al() { return r.h.al; }
inline uint ah() { return r.h.ah; }
inline uint bl() { return r.h.bl; }
inline uint bh() { return r.h.bh; }
inline uint cl() { return r.h.cl; }
inline uint ch() { return r.h.ch; }
inline uint dl() { return r.h.dl; }
inline uint dh() { return r.h.dh; }
#ifdef __DJGPP__
inline uint ax() { return r.x.ax; }
inline uint bx() { return r.x.bx; }
inline uint cx() { return r.x.cx; }
inline uint dx() { return r.x.dx; }
inline uint bp() { return r.x.bp; }
inline uint si() { return r.x.si; }
inline uint di() { return r.x.di; }
inline uint ds() { return r.x.ds; }
inline uint es() { return r.x.es; }
inline uint flags() { return r.x.flags; }
#else
inline uint ax() { return r.w.ax; }
inline uint bx() { return r.w.bx; }
inline uint cx() { return r.w.cx; }
inline uint dx() { return r.w.dx; }
inline uint bp() { return r.w.bp; }
inline uint si() { return r.w.si; }
inline uint di() { return r.w.di; }
#if defined(__BORLANDC__)
inline uint ds() { return sr.w.ds; }
inline uint es() { return sr.w.es; }
#else
inline uint ds() { return r.w.ds; }
inline uint es() { return r.w.es; }
#endif
inline uint flags() { return r.w.flags; }
#endif
inline void al(ulong b) { r.h.al = (byte)b; }
inline void ah(ulong b) { r.h.ah = (byte)b; }
inline void bl(ulong b) { r.h.bl = (byte)b; }
inline void bh(ulong b) { r.h.bh = (byte)b; }
inline void cl(ulong b) { r.h.cl = (byte)b; }
inline void ch(ulong b) { r.h.ch = (byte)b; }
inline void dl(ulong b) { r.h.dl = (byte)b; }
inline void dh(ulong b) { r.h.dh = (byte)b; }
#ifdef __DJGPP__
inline void ax(ulong w) { r.x.ax = (word)w; }
inline void bx(ulong w) { r.x.bx = (word)w; }
inline void cx(ulong w) { r.x.cx = (word)w; }
inline void dx(ulong w) { r.x.dx = (word)w; }
inline void bp(ulong w) { r.x.bp = (word)w; }
inline void si(ulong w) { r.x.si = (word)w; }
inline void di(ulong w) { r.x.di = (word)w; }
inline void ds(ulong w) { r.x.ds = (word)w; }
inline void es(ulong w) { r.x.es = (word)w; }
inline void flags(ulong w) { r.x.flags = (word)w; }
#else
inline void ax(ulong w) { r.w.ax = (word)w; }
inline void bx(ulong w) { r.w.bx = (word)w; }
inline void cx(ulong w) { r.w.cx = (word)w; }
inline void dx(ulong w) { r.w.dx = (word)w; }
inline void bp(ulong w) { r.w.bp = (word)w; }
inline void si(ulong w) { r.w.si = (word)w; }
inline void di(ulong w) { r.w.di = (word)w; }
#if defined(__BORLANDC__)
inline void ds(ulong w) { sr.w.ds = (word)w; }
inline void es(ulong w) { sr.w.es = (word)w; }
#else
inline void ds(ulong w) { r.w.ds = (word)w; }
inline void es(ulong w) { r.w.es = (word)w; }
#endif
inline void flags(ulong w) { r.w.flags = (word)w; }
#endif
void genint(int intno);
};
// ------------------------------------------------------------------
// Inline implementations
inline void i86::genint(int intno) {
#if defined(__BORLANDC__)
#if defined(__DPMI32__)
int386x(intno, &r, &r, &sr);
#else
int86x(intno, &r, &r, &sr);
#endif
#elif defined(__DJGPP__)
__dpmi_int(intno, &r);
#else
intr(intno, &r);
#endif
}
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#if defined(__WATCOMC__) && defined(__386__)
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inline int __dpmi_allocate_dos_memory(long len, int &buf) {
i86 cpu;
// Determine how much is available
cpu.ax(0x100);
cpu.bx(65535u);
cpu.genint(0x31);
if(len > (long)cpu.bx()*16L)
return -1;
cpu.ax(0x100);
cpu.bx(len);
cpu.genint(0x31);
*buffer = (int) cpu.dx();
return (int) cpu.ax();
}
inline void __dpmi_free_dos_memory(int buffer) {
i86 cpu;
cpu.ax(0x101);
cpu.dx((word) buffer);
cpu.genint(0x31);
}
#endif
// ------------------------------------------------------------------
// A more portable version of MK_FP()
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#if defined(__WATCOMC__) && defined(__386__)
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#define gmkfp(s,o) ((s << 4) + o)
#elif defined(__DJGPP__)
#include <sys/nearptr.h>
#include <crt0.h>
inline void *gmkfp(unsigned short seg, unsigned short ofs) {
if(not (_crt0_startup_flags & _CRT0_FLAG_NEARPTR))
if(not __djgpp_nearptr_enable())
return (void *)0;
return (void *)(seg*16 + ofs + __djgpp_conventional_base);
}
#else
#define gmkfp(s,o) MK_FP(s,o)
#endif
// ------------------------------------------------------------------
#endif
#endif
// ------------------------------------------------------------------