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deb-goldedplus/goldlib/gall/gcharset.cpp

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2001-07-03 04:27:54 +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
// ------------------------------------------------------------------
// $Id$
// ------------------------------------------------------------------
// Utility functions.
// ------------------------------------------------------------------
#include <cstdlib>
#include <cstdio>
#include <clocale>
#include <gcmpall.h>
#include <gstrall.h>
#ifdef __WIN32__
#include <windows.h>
#endif
#ifdef __OS2__
#define INCL_DOS
#include <os2.h>
#endif
#ifdef __DJGPP__
#include <dpmi.h>
#include <sys/farptr.h>
#endif
static char charsetbuf[256];
const char *get_charset(void)
{
#if defined(__DJGPP__)
int segment, selector;
__dpmi_regs regs;
strcpy(charsetbuf, "IBMPC");
if ((segment = __dpmi_allocate_dos_memory(3, &selector)) != -1) {
regs.h.ah = 0x65;
regs.h.al = 0x01;
regs.x.bx = 0xffff;
regs.x.dx = 0xffff;
regs.x.cx = 41;
regs.x.es = segment;
regs.x.di = 0;
__dpmi_int(0x21, &regs);
if (!(regs.x.flags & 1) and (regs.x.cx == 41)) {
int CCP = _farpeekw(selector, 5);
sprintf(charsetbuf, "CP%i", CCP);
}
__dpmi_free_dos_memory(selector);
}
#elif defined(__WIN32__)
sprintf(charsetbuf, "CP%i", GetOEMCP());
#elif defined(__OS2__)
ULONG CCP[8];
ULONG cb;
strcpy(charsetbuf, "IBMPC");
if(DosQueryCp(sizeof (CCP), CCP, &cb) == 0)
sprintf(charsetbuf, "CP%i", CCP[0]);
#else
const char *cp;
strcpy(charsetbuf, "LATIN-1");
cp = setlocale(LC_CTYPE, "");
if((cp != NULL) and ((cp = strchr(cp, '.')) != NULL)) {
if(strieql(cp, "KOI8R"))
cp = "KOI8-R";
strxcpy(charsetbuf, cp, sizeof(charsetbuf));
}
#endif
return charsetbuf;
}
const char *get_dos_charset(const char *cpfrom)
{
#if defined(__WIN32__) || defined(__MSDOS__) || defined(__OS2__)
(void)cpfrom; // These platforms use DOS CP on console, so ignore request
return "";
#else
static const struct _cpmap {
char *from, *to;
} cpmap[] = {
{ "LATIN-1", "CP437" },
{ "KOI8-R", "CP866" },
{ NULL, NULL }
};
int i;
for(i = 0; cpmap[i].from != NULL; i++) {
if(strieql(cpfrom, cpmap[i].from))
return cpmap[i].to;
}
return "";
#endif
}