[bpt/emacs.git] / src / tparam.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

#ifdef emacs
#include "lisp.h"		/* for xmalloc */
#else
#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
\f
#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 */
\f
/* 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;

	    default:
	      abort ();
	    }
	}
      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;
}
\f
#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 */
Commit	Line	Data
e0dd62f6	1	/* Merge parameters into a termcap entry string.
9e3295f9	2	Copyright (C) 1985, 87, 93, 95 Free Software Foundation, Inc.
e0dd62f6 RM	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2, or (at your option)
	7	any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; see the file COPYING. If not, write to
ba4a8e51 KH	16	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
ba4a8e51 KH	17	Boston, MA 02111-1307, USA. */
e0dd62f6 RM	18
	19	/* Emacs config.h may rename various library functions such as malloc. */
	20	#ifdef HAVE_CONFIG_H
	21	#include <config.h>
c70c2705	22	#endif
e0dd62f6	23
83c2ece5 DL	24	#ifdef emacs
	25	#include "lisp.h" /* for xmalloc */
	26	#else
e0dd62f6 RM	27	#if defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)
	28	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	29	#endif
	30
	31	#ifdef STDC_HEADERS
	32	#include <stdlib.h>
	33	#include <string.h>
	34	#else
	35	char *malloc ();
	36	char *realloc ();
	37	#endif
	38
c70c2705	39	#endif /* not emacs */
e0dd62f6 RM	40
	41	#ifndef NULL
	42	#define NULL (char *) 0
	43	#endif
	44	\f
	45	#ifndef emacs
	46	static void
	47	memory_out ()
	48	{
	49	write (2, "virtual memory exhausted\n", 25);
	50	exit (1);
	51	}
	52
	53	static char *
	54	xmalloc (size)
	55	unsigned size;
	56	{
	57	register char *tem = malloc (size);
	58
	59	if (!tem)
	60	memory_out ();
	61	return tem;
	62	}
	63
	64	static char *
	65	xrealloc (ptr, size)
	66	char *ptr;
	67	unsigned size;
	68	{
	69	register char *tem = realloc (ptr, size);
	70
	71	if (!tem)
	72	memory_out ();
	73	return tem;
	74	}
	75	#endif /* not emacs */
	76	\f
	77	/* Assuming STRING is the value of a termcap string entry
	78	containing `%' constructs to expand parameters,
	79	merge in parameter values and store result in block OUTSTRING points to.
	80	LEN is the length of OUTSTRING. If more space is needed,
	81	a block is allocated with `malloc'.
	82
	83	The value returned is the address of the resulting string.
	84	This may be OUTSTRING or may be the address of a block got with `malloc'.
	85	In the latter case, the caller must free the block.
	86
	87	The fourth and following args to tparam serve as the parameter values. */
	88
	89	static char *tparam1 ();
	90
	91	/* VARARGS 2 */
	92	char *
	93	tparam (string, outstring, len, arg0, arg1, arg2, arg3)
	94	char *string;
	95	char *outstring;
	96	int len;
	97	int arg0, arg1, arg2, arg3;
	98	{
e0dd62f6	99	int arg[4];
9e3295f9	100
e0dd62f6 RM	101	arg[0] = arg0;
	102	arg[1] = arg1;
	103	arg[2] = arg2;
	104	arg[3] = arg3;
	105	return tparam1 (string, outstring, len, NULL, NULL, arg);
e0dd62f6 RM	106	}
	107
	108	char *BC;
	109	char *UP;
	110
	111	static char tgoto_buf[50];
	112
	113	char *
	114	tgoto (cm, hpos, vpos)
	115	char *cm;
	116	int hpos, vpos;
	117	{
	118	int args[2];
	119	if (!cm)
	120	return NULL;
	121	args[0] = vpos;
	122	args[1] = hpos;
	123	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	124	}
	125
	126	static char *
	127	tparam1 (string, outstring, len, up, left, argp)
	128	char *string;
	129	char *outstring;
	130	int len;
	131	char up, left;
	132	register int *argp;
	133	{
	134	register int c;
	135	register char *p = string;
	136	register char *op = outstring;
	137	char *outend;
	138	int outlen = 0;
	139
	140	register int tem;
	141	int *old_argp = argp;
	142	int doleft = 0;
	143	int doup = 0;
	144
	145	outend = outstring + len;
	146
	147	while (1)
	148	{
	149	/* If the buffer might be too short, make it bigger. */
	150	if (op + 5 >= outend)
	151	{
	152	register char *new;
	153	if (outlen == 0)
	154	{
	155	outlen = len + 40;
	156	new = (char *) xmalloc (outlen);
	157	outend += 40;
	158	bcopy (outstring, new, op - outstring);
	159	}
	160	else
	161	{
	162	outend += outlen;
	163	outlen *= 2;
	164	new = (char *) xrealloc (outstring, outlen);
	165	}
	166	op += new - outstring;
	167	outend += new - outstring;
	168	outstring = new;
	169	}
170	c = *p++;
171	if (!c)
172	break;
173	if (c == '%')
174	{
175	c = *p++;
176	tem = *argp;
177	switch (c)
178	{
179	case 'd': /* %d means output in decimal. */
180	if (tem < 10)
181	goto onedigit;
182	if (tem < 100)
183	goto twodigit;
184	case '3': /* %3 means output in decimal, 3 digits. */
185	if (tem > 999)
186	{
187	*op++ = tem / 1000 + '0';
188	tem %= 1000;
189	}
190	*op++ = tem / 100 + '0';
191	case '2': /* %2 means output in decimal, 2 digits. */
192	twodigit:
193	tem %= 100;
194	*op++ = tem / 10 + '0';
195	onedigit:
196	*op++ = tem % 10 + '0';
197	argp++;
198	break;
199
200	case 'C':
201	/* For c-100: print quotient of value by 96, if nonzero,
202	then do like %+. */
203	if (tem >= 96)
204	{
205	*op++ = tem / 96;
206	tem %= 96;
207	}
208	case '+': /* %+x means add character code of char x. */
209	tem += *p++;
210	case '.': /* %. means output as character. */
211	if (left)
212	{
213	/* If want to forbid output of 0 and \n and \t,
214	and this is one of them, increment it. */
215	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
216	{
217	tem++;
218	if (argp == old_argp)
219	doup++, outend -= strlen (up);
220	else
221	doleft++, outend -= strlen (left);
222	}
223	}
224	*op++ = tem ? tem : 0200;
225	case 'f': /* %f means discard next arg. */
226	argp++;
227	break;
228
229	case 'b': /* %b means back up one arg (and re-use it). */
230	argp--;
231	break;
232
233	case 'r': /* %r means interchange following two args. */
234	argp[0] = argp[1];
235	argp[1] = tem;
236	old_argp++;
237	break;
238
239	case '>': /* %>xy means if arg is > char code of x, */
240	if (argp[0] > p++) / then add char code of y to the arg, */
241	argp[0] += p; / and in any case don't output. */
242	p++; /* Leave the arg to be output later. */
243	break;
244
245	case 'a': /* %a means arithmetic. */
246	/* Next character says what operation.
247	Add or subtract either a constant or some other arg. */
248	/* First following character is + to add or - to subtract
249	or = to assign. */
250	/* Next following char is 'p' and an arg spec
251	(0100 plus position of that arg relative to this one)
252	or 'c' and a constant stored in a character. */
253	tem = p[2] & 0177;
254	if (p[1] == 'p')
255	tem = argp[tem - 0100];
256	if (p[0] == '-')
257	argp[0] -= tem;
258	else if (p[0] == '+')
259	argp[0] += tem;
260	else if (p[0] == '*')
261	argp[0] *= tem;
262	else if (p[0] == '/')
263	argp[0] /= tem;
264	else
265	argp[0] = tem;
266
267	p += 3;
268	break;
269
270	case 'i': /* %i means add one to arg, */
271	argp[0] ++; /* and leave it to be output later. */
272	argp[1] ++; /* Increment the following arg, too! */
273	break;
274
275	case '%': /* %% means output %; no arg. */
276	goto ordinary;
277
278	case 'n': /* %n means xor each of next two args with 140. */
279	argp[0] ^= 0140;
280	argp[1] ^= 0140;
281	break;
282
283	case 'm': /* %m means xor each of next two args with 177. */
284	argp[0] ^= 0177;
285	argp[1] ^= 0177;
286	break;
287
288	case 'B': /* %B means express arg as BCD char code. */
289	argp[0] += 6 * (tem / 10);
290	break;
291
292	case 'D': /* %D means weird Delta Data transformation. */
293	argp[0] -= 2 * (tem % 16);
294	break;
45e0dd95 GM	295
	296	default:
	297	abort ();
e0dd62f6 RM	298	}
	299	}
	300	else
	301	/* Ordinary character in the argument string. */
	302	ordinary:
	303	*op++ = c;
	304	}
	305	*op = 0;
	306	while (doup-- > 0)
	307	strcat (op, up);
	308	while (doleft-- > 0)
	309	strcat (op, left);
	310	return outstring;
	311	}
	312	\f
	313	#ifdef DEBUG
	314
	315	main (argc, argv)
	316	int argc;
	317	char **argv;
	318	{
	319	char buf[50];
	320	int args[3];
	321	args[0] = atoi (argv[2]);
	322	args[1] = atoi (argv[3]);
	323	args[2] = atoi (argv[4]);
	324	tparam1 (argv[1], buf, "LEFT", "UP", args);
	325	printf ("%s\n", buf);
	326	return 0;
	327	}
	328
	329	#endif /* DEBUG */