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/* $Id: charsubst.c,v 3.0 1993/12/21 21:54:40 davison Trn $
*/
/*
* Permission is hereby granted to copy, reproduce, redistribute or otherwise
* use this software as long as: there is no monetary profit gained
* specifically from the use or reproduction of this software, it is not
* sold, rented, traded or otherwise marketed, and this copyright notice is
* included prominently in any copy made.
*
* The authors make no claims as to the fitness or correctness of this software
* for any use whatsoever, and it is provided as is. Any use of this software
* is at the user's own risk.
*/
#include "EXTERN.h"
#include "common.h"
#include "search.h"
#include "artstate.h"
#include "INTERN.h"
#include "charsubst.h"
#ifdef CHARSUBST
/* TeX encoding table - gives ISO char for "x (x=32..127) */
static unsigned char textbl[96] = {
0, 0,'"', 0, 0, 0, 0,'"', 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0,196, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,214,
0, 0, 0, 0, 0,220, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
'"',228, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,246,
0, 0, 0,223, 0,252, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static void Latin1toASCII _((unsigned char*,unsigned char*,int));
static char texchar = '\0';
int
putsubstchar(c, limit, outputok)
int c;
int limit;
bool_int outputok;
{
unsigned char d, oc[2], nc[5];
int t, i = 0;
switch (*charsubst) {
case 'm':
t = 1;
goto doconvert;
case 'a':
t = 2;
/* FALL THROUGH */
doconvert:
oc[0] = (unsigned char)c;
oc[1] = '\0';
Latin1toASCII(oc, nc, t);
if ((i = strlen((char*)nc)) <= limit) {
if (outputok)
for (t = 0; t < i; t++)
putchar((char)nc[t]);
}
else
i = -1;
break;
case 't':
if (c == '\\' || c == '"') {
if (texchar && (c == '\\' || texchar != '\\')) {
if (outputok)
putchar(texchar);
i++;
}
texchar = (char)c;
break;
} else if (texchar == '\\') {
if (outputok)
putchar('\\');
if (limit == 1) {
i = -2;
break;
}
i++;
} else if (texchar == '"') {
if (c < 32 || c > 128)
d = '\0';
else
d = textbl[c-32];
texchar = '\0';
if (d)
c = d;
else {
if (outputok)
putchar('"');
if (limit == 1) {
i = -2;
break;
}
i++;
}
}
/* FALL THROUGH */
default:
if (outputok)
putchar(c);
i++;
break;
}
return i;
}
char *
current_charsubst()
{
static char *show;
switch(*charsubst) {
case 'm':
#ifdef VERBOSE
IF(verbose)
show = "[ISO->monosp] ";
ELSE
#endif
#ifdef TERSE
show = "[M] ";
#endif
break;
case 'a':
#ifdef VERBOSE
IF(verbose)
show = "[ISO->ASCII] ";
ELSE
#endif
#ifdef TERSE
show = "[A] ";
#endif
break;
case 't':
#ifdef VERBOSE
IF(verbose)
show = "[TeX->ISO] ";
ELSE
#endif
#ifdef TERSE
show = "[T] ";
#endif
break;
default:
show = "";
break;
}
return show;
}
void
strcharsubst(inb, outb)
char *inb, *outb;
{
switch(*charsubst) {
case 'a':
Latin1toASCII((unsigned char*)inb, (unsigned char*)outb, 2);
break;
default:
strcpy(outb, inb);
}
}
/* The following is an adapted version of iso2asc by Markus Kuhn,
University of Erlangen, Germany <mskuhn@immd4.uni-erlangen.de>
*/
#define ISO_TABLES 2 /* originally: 7 */
/* Conversion tables for displaying the G1 set (0xa0-0xff) of
ISO Latin 1 (ISO 8859-1) with 7-bit ASCII characters.
Version 1.2 -- error corrections are welcome
Table Purpose
0 universal table for many languages
1 single-spacing universal table
2 table for Danish, Dutch, German, Norwegian and Swedish
3 table for Danish, Finnish, Norwegian and Swedish using
the appropriate ISO 646 variant.
4 table with RFC 1345 codes in brackets
5 table for printers that allow overstriking with backspace
Markus Kuhn <mskuhn@immd4.informatik.uni-erlangen.de> */
/* In this version, I have taken out all tables except 1 and 2 -ot */
#define SUB NULL /* used if no reasonable ASCII string is possible */
static char *iso2asc[ISO_TABLES][96] = {
{
" ","!","c",SUB,SUB,"Y","|",SUB,"\"","c","a","<","-","-","R","-",
" ",SUB,"2","3","'","u","P",".",",","1","o",">",SUB,SUB,SUB,"?",
"A","A","A","A","A","A","A","C","E","E","E","E","I","I","I","I",
"D","N","O","O","O","O","O","x","O","U","U","U","U","Y","T","s",
"a","a","a","a","a","a","a","c","e","e","e","e","i","i","i","i",
"d","n","o","o","o","o","o",":","o","u","u","u","u","y","t","y"
},{
" ","!","c",SUB,SUB,"Y","|",SUB,"\"","(c)","a","<<","-","-","(R)","-",
" ","+/-","2","3","'","u","P",".",",","1","o",">>"," 1/4"," 1/2"," 3/4","?",
"A","A","A","A","Ae","Aa","AE","C","E","E","E","E","I","I","I","I",
"D","N","O","O","O","O","Oe","x","Oe","U","U","U","Ue","Y","Th","ss",
"a","a","a","a","ae","aa","ae","c","e","e","e","e","i","i","i","i",
"d","n","o","o","o","o","oe",":","oe","u","u","u","ue","y","th","ij"
}
};
/*
* Transform an 8-bit ISO Latin 1 string iso into a 7-bit ASCII string asc
* readable on old terminals using conversion table t.
*
* worst case: strlen(iso) == 4*strlen(asc)
*/
static void
Latin1toASCII(iso, asc, t)
unsigned char *iso, *asc;
int t;
{
char *p, **tab;
if (iso == NULL || asc == NULL)
return;
t--; /* offset correction -ot */
tab = iso2asc[t] - 0xa0;
while (*iso) {
if (*iso > 0x9f) {
p = tab[*iso++];
if (p) {
while (*p)
*asc++ = *p++;
}
} else
*asc++ = *iso++;
}
*asc = 0;
}
#endif
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