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/***
*mbctype.c - MBCS table used by the functions that test for types of char
*
* Copyright (c) 1987-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* table used to determine the type of char
*
*Revision History:
* 11-19-92 KRS Ported from 16-bit sources.
* 08-12-93 CFW Change _mbctype to _VARTYPE1 to allow DLL export.
* 08-13-93 CFW Remove OS2 and rework for _WIN32_.
*
*******************************************************************************/
#ifdef _MBCS
#include <cruntime.h>
#include <mbdata.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef _MBCS_OS
#ifdef _WIN32_
#include <windows.h>
#endif /* _WIN32_ */
/* local routines */
static char * _mbcs_getlead(void);
#endif /* _MBCS_OS */
/*
* make sure this is being compiled correctly
*/
#if (!defined(_KANJI) && !defined(_MBCS_OS))
#error Must specify MBCS locale.
#endif
#if (defined(_KANJI) && defined(_MBCS_OS))
#error Can't define _KANJI and _MBCS_OS together.
#endif
/*
* set bit masks for the possible MBCS types
* (all MBCS bit masks start with "_M")
*/
#define _MS 0x01 /* MBCS single byte symbol */
#define _MP 0x02 /* MBCS punct */
#define _M1 0x04 /* MBCS 1st (lead) byte */
#define _M2 0x08 /* MBCS 2nd byte*/
/*
* MBCS ctype array
*/
#ifdef _KANJI
/*
* Kanji Table: PreInitialized
*/
unsigned char _VARTYPE1 _mbctype[257] = {
0,
/* 0 1 2 3 4 5 6 7 */
/*--------------+-------+-------+-------+-------+-------+-------+-------*/
/*00*/ 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/*10*/ 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/*20*/ 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/*30*/ 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/*40*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*50*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*60*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*70*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, 0,
/*80*/ _M2,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
/*90*/ _M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
/*A0*/ _M2,_M2|_MP,_M2|_MP,_M2|_MP,_M2|_MP,_M2|_MP,_M2|_MS,_M2|_MS,
_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
/*B0*/ _M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
/*C0*/ _M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
/*D0*/ _M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,_M2|_MS,
/*E0*/ _M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
/*F0*/ _M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,
_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1,_M2|_M1, 0, 0, 0,
};
#endif
#ifdef _MBCS_OS
/*
* Generic Table - All bytes except NUL are legal trailing bytes
*/
unsigned char _VARTYPE1 _mbctype[257] = {
0,
/* 0 1 2 3 4 5 6 7 */
/*--------------+-------+-------+-------+-------+-------+-------+-------*/
/*00*/ 0, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*10*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*20*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*30*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*40*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*50*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*60*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*70*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*80*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*90*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*A0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*B0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*C0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*D0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*E0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
/*F0*/ _M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
_M2, _M2, _M2, _M2, _M2, _M2, _M2, _M2,
};
/***
*_mbcsinit() - Init MBCS data
*
*Purpose:
* Get MBCS data from the OS and init our table with it.
*
* (1) DOS: check for version 3.3 or later.
* (2) call OS to get table
*
* This routine is meant to be called once (and only once)
* at startup time.
*Entry:
* void
*Exit:
* void
*
*Exceptions:
*
*******************************************************************************/
void _mbcsinit(void)
{
unsigned char * lbtab;
unsigned char first, last, curr;
#ifndef _WIN32_
/*
* DOS version must be 3.3 or better
*/
if ( (_osmajor < 3) ||
(_osmajor == 3) && (_osminor < 3)
)
_mbfatal();
#endif
/*
* get the lead byte table from OS
*/
if ((lbtab = _mbcs_getlead()) == NULL)
return; // leave table all zeroes
/*
* walk through OS lead byte table flipping bits
* in the _mbctype[] table appropriately.
*/
for (;;) {
first = *lbtab++;
last = *lbtab++;
if ((first == 0) && (last == 0))
break;
for (curr=first; curr<=last; curr++)
_mbctype[curr+1] |= _M1;
}
}
/***
*_mbcs_getlead() - Get lead byte pairs from OS
*
*Purpose:
* Gets the pairs of lead byte values from the OS.
*
*Entry:
* void
*
*Exit:
* void * = pointer to lead byte pairs
* = NULL = error
*
*Exceptions:
*
*******************************************************************************/
static char * _mbcs_getlead(void)
{
#ifdef _WIN32_
/* maximum # of leadbyte values */
#define _MAXLBVALS 12
static CPINFO info;
char *ev;
int cp;
if ((ev = getenv("MBCS_CP")) == NULL) {
cp = CP_ACP;
} else {
cp = atoi(ev);
}
/*
* get lead byte table from OS
*/
if (!GetCPInfo(cp, &info))
return(NULL); /* failure */
return((unsigned char *)info.LeadByte); /* success */
#else /* DOS */
_asm {
push ds
xor si,si
mov ds,si
mov ax,6300h
int 21h ; get lead byte table
jnc ok
xor si,si ; error: return NULL
mov ds,si
ok:
mov ax,si ; success: return ptr to table
mov dx,ds
pop ds
}
#endif
}
#ifndef _WIN32_
/***
*_mbfatal() - Fatal MBCS error
*
*Purpose:
* Terminate program
*
*Entry:
* void
*Exit:
* void
*
*Exceptions:
*
*******************************************************************************/
static void _CRTAPI3 _mbfatal(void)
{
_asm {
mov ax,_RT_ABORT
jmp _amsg_exit
}
}
#endif /* _WIN32_ */
#endif /* _MBCS_OS */
#endif /* _MBCS */
|
