mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-21 10:24:55 +00:00
325 lines
7.3 KiB
C
325 lines
7.3 KiB
C
/* Merge parameters into a termcap entry string.
|
||
Copyright (C) 1985, 87, 93, 95 Free Software Foundation, Inc.
|
||
|
||
This program 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.
|
||
|
||
This program 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 this program; see the file COPYING. If not, write to
|
||
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
/* Emacs config.h may rename various library functions such as malloc. */
|
||
#ifdef HAVE_CONFIG_H
|
||
#include <config.h>
|
||
#endif
|
||
|
||
#ifndef emacs
|
||
#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
|
||
#define bcopy(s, d, n) memcpy ((d), (s), (n))
|
||
#endif
|
||
|
||
#ifdef STDC_HEADERS
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#else
|
||
char *malloc ();
|
||
char *realloc ();
|
||
#endif
|
||
|
||
#endif /* not emacs */
|
||
|
||
#ifndef NULL
|
||
#define NULL (char *) 0
|
||
#endif
|
||
|
||
#ifndef emacs
|
||
static void
|
||
memory_out ()
|
||
{
|
||
write (2, "virtual memory exhausted\n", 25);
|
||
exit (1);
|
||
}
|
||
|
||
static char *
|
||
xmalloc (size)
|
||
unsigned size;
|
||
{
|
||
register char *tem = malloc (size);
|
||
|
||
if (!tem)
|
||
memory_out ();
|
||
return tem;
|
||
}
|
||
|
||
static char *
|
||
xrealloc (ptr, size)
|
||
char *ptr;
|
||
unsigned size;
|
||
{
|
||
register char *tem = realloc (ptr, size);
|
||
|
||
if (!tem)
|
||
memory_out ();
|
||
return tem;
|
||
}
|
||
#endif /* not 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 ();
|
||
|
||
/* VARARGS 2 */
|
||
char *
|
||
tparam (string, outstring, len, arg0, arg1, arg2, arg3)
|
||
char *string;
|
||
char *outstring;
|
||
int len;
|
||
int arg0, arg1, arg2, arg3;
|
||
{
|
||
int arg[4];
|
||
|
||
arg[0] = arg0;
|
||
arg[1] = arg1;
|
||
arg[2] = arg2;
|
||
arg[3] = arg3;
|
||
return tparam1 (string, outstring, len, NULL, NULL, arg);
|
||
}
|
||
|
||
char *BC;
|
||
char *UP;
|
||
|
||
static char tgoto_buf[50];
|
||
|
||
char *
|
||
tgoto (cm, hpos, vpos)
|
||
char *cm;
|
||
int hpos, vpos;
|
||
{
|
||
int args[2];
|
||
if (!cm)
|
||
return NULL;
|
||
args[0] = vpos;
|
||
args[1] = hpos;
|
||
return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
|
||
}
|
||
|
||
static char *
|
||
tparam1 (string, outstring, len, up, left, argp)
|
||
char *string;
|
||
char *outstring;
|
||
int len;
|
||
char *up, *left;
|
||
register int *argp;
|
||
{
|
||
register int c;
|
||
register char *p = string;
|
||
register char *op = outstring;
|
||
char *outend;
|
||
int outlen = 0;
|
||
|
||
register 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)
|
||
{
|
||
register char *new;
|
||
if (outlen == 0)
|
||
{
|
||
outlen = len + 40;
|
||
new = (char *) xmalloc (outlen);
|
||
outend += 40;
|
||
bcopy (outstring, new, op - outstring);
|
||
}
|
||
else
|
||
{
|
||
outend += outlen;
|
||
outlen *= 2;
|
||
new = (char *) xrealloc (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 ? 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 */
|