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/* Merge parameters into a termcap entry string.
Copyright (C) 1985, 1987, 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of XEmacs.
XEmacs 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, or (at your option) any
later version.
XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Synched up with: Not synched with FSF. */
/* config.h may rename various library functions such as malloc. */
#ifdef emacs
#include <config.h>
#include <string.h>
#define realloc xrealloc
#define malloc xmalloc
#define free xfree
extern void *xmalloc (int size);
extern void *xrealloc (void *, int size);
#else /* emacs */
#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#else
extern char *malloc ();
extern char *realloc ();
#endif
#endif /* !emacs */
/* Assuming STRING is the value of a termcap string entry
containing `%' constructs to expand parameters,
merge in parameter values and store result in block OUTSTRING points to.
LEN is the length of OUTSTRING. If more space is needed,
a block is allocated with `malloc'.
The value returned is the address of the resulting string.
This may be OUTSTRING or may be the address of a block got with `malloc'.
In the latter case, the caller must free the block.
The fourth and following args to tparam serve as the parameter values. */
static char *tparam1 (CONST char *string, char *outstring, int len,
CONST char *up, CONST char *left,
int *argp);
char *tparam (CONST char *string, char *outstring, int len, int arg0, int arg1,
int arg2, int arg3);
char *
tparam (CONST char *string, char *outstring, int len, int arg0, int arg1,
int arg2, int arg3)
{
int arg[4];
arg[0] = arg0;
arg[1] = arg1;
arg[2] = arg2;
arg[3] = arg3;
return tparam1 (string, outstring, len, 0, 0, arg);
}
CONST char *BC;
CONST char *UP;
static char tgoto_buf[50];
char *tgoto (CONST char *cm, int hpos, int vpos);
char *
tgoto (CONST char *cm, int hpos, int vpos)
{
int args[2];
if (!cm)
return 0;
args[0] = vpos;
args[1] = hpos;
return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
}
static char *
tparam1 (CONST char *string, char *outstring, int len, CONST char *up,
CONST char *left, int *argp)
{
int c;
CONST char *p = string;
char *op = outstring;
char *outend;
int outlen = 0;
int tem;
int *old_argp = argp;
int doleft = 0;
int doup = 0;
outend = outstring + len;
while (1)
{
/* If the buffer might be too short, make it bigger. */
if (op + 5 >= outend)
{
char *new;
if (outlen == 0)
{
outlen = len + 40;
new = (char *) malloc (outlen);
outend += 40;
memcpy (new, outstring, op - outstring);
}
else
{
outend += outlen;
outlen *= 2;
new = (char *) realloc (outstring, outlen);
}
op += new - outstring;
outend += new - outstring;
outstring = new;
}
c = *p++;
if (!c)
break;
if (c == '%')
{
c = *p++;
tem = *argp;
switch (c)
{
case 'd': /* %d means output in decimal. */
if (tem < 10)
goto onedigit;
if (tem < 100)
goto twodigit;
case '3': /* %3 means output in decimal, 3 digits. */
if (tem > 999)
{
*op++ = tem / 1000 + '0';
tem %= 1000;
}
*op++ = tem / 100 + '0';
case '2': /* %2 means output in decimal, 2 digits. */
twodigit:
tem %= 100;
*op++ = tem / 10 + '0';
onedigit:
*op++ = tem % 10 + '0';
argp++;
break;
case 'C':
/* For c-100: print quotient of value by 96, if nonzero,
then do like %+. */
if (tem >= 96)
{
*op++ = tem / 96;
tem %= 96;
}
case '+': /* %+x means add character code of char x. */
tem += *p++;
case '.': /* %. means output as character. */
if (left)
{
/* If want to forbid output of 0 and \n and \t,
and this is one of them, increment it. */
while (tem == 0 || tem == '\n' || tem == '\t')
{
tem++;
if (argp == old_argp)
doup++, outend -= strlen (up);
else
doleft++, outend -= strlen (left);
}
}
*op++ = tem | 0200;
case 'f': /* %f means discard next arg. */
argp++;
break;
case 'b': /* %b means back up one arg (and re-use it). */
argp--;
break;
case 'r': /* %r means interchange following two args. */
argp[0] = argp[1];
argp[1] = tem;
old_argp++;
break;
case '>': /* %>xy means if arg is > char code of x, */
if (argp[0] > *p++) /* then add char code of y to the arg, */
argp[0] += *p; /* and in any case don't output. */
p++; /* Leave the arg to be output later. */
break;
case 'a': /* %a means arithmetic. */
/* Next character says what operation.
Add or subtract either a constant or some other arg. */
/* First following character is + to add or - to subtract
or = to assign. */
/* Next following char is 'p' and an arg spec
(0100 plus position of that arg relative to this one)
or 'c' and a constant stored in a character. */
tem = p[2] & 0177;
if (p[1] == 'p')
tem = argp[tem - 0100];
if (p[0] == '-')
argp[0] -= tem;
else if (p[0] == '+')
argp[0] += tem;
else if (p[0] == '*')
argp[0] *= tem;
else if (p[0] == '/')
argp[0] /= tem;
else
argp[0] = tem;
p += 3;
break;
case 'i': /* %i means add one to arg, */
argp[0] ++; /* and leave it to be output later. */
argp[1] ++; /* Increment the following arg, too! */
break;
case '%': /* %% means output %; no arg. */
goto ordinary;
case 'n': /* %n means xor each of next two args with 140. */
argp[0] ^= 0140;
argp[1] ^= 0140;
break;
case 'm': /* %m means xor each of next two args with 177. */
argp[0] ^= 0177;
argp[1] ^= 0177;
break;
case 'B': /* %B means express arg as BCD char code. */
argp[0] += 6 * (tem / 10);
break;
case 'D': /* %D means weird Delta Data transformation. */
argp[0] -= 2 * (tem % 16);
break;
}
}
else
/* Ordinary character in the argument string. */
ordinary:
*op++ = c;
}
*op = 0;
while (doup-- > 0)
strcat (op, up);
while (doleft-- > 0)
strcat (op, left);
return outstring;
}
#ifdef DEBUG
main (argc, argv)
int argc;
char **argv;
{
char buf[50];
int args[3];
args[0] = atoi (argv[2]);
args[1] = atoi (argv[3]);
args[2] = atoi (argv[4]);
tparam1 (argv[1], buf, "LEFT", "UP", args);
printf ("%s\n", buf);
return 0;
}
#endif /* DEBUG */
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