[bpt/emacs.git] / 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Emacs config.h may rename various library functions such as malloc.  */
#ifdef HAVE_CONFIG_H
#include <config.h>
#else /* not HAVE_CONFIG_H */

#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 HAVE_CONFIG_H */

#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;
	    }
	}
      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
	16	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
	17
	18	/* Emacs config.h may rename various library functions such as malloc. */
	19	#ifdef HAVE_CONFIG_H
	20	#include <config.h>
	21	#else /* not HAVE_CONFIG_H */
	22
	23	#if defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)
	24	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	25	#endif
	26
	27	#ifdef STDC_HEADERS
	28	#include <stdlib.h>
	29	#include <string.h>
	30	#else
	31	char *malloc ();
	32	char *realloc ();
	33	#endif
	34
	35	#endif /* not HAVE_CONFIG_H */
	36
	37	#ifndef NULL
	38	#define NULL (char *) 0
	39	#endif
	40	\f
	41	#ifndef emacs
	42	static void
	43	memory_out ()
	44	{
	45	write (2, "virtual memory exhausted\n", 25);
	46	exit (1);
	47	}
	48
	49	static char *
	50	xmalloc (size)
	51	unsigned size;
	52	{
	53	register char *tem = malloc (size);
	54
	55	if (!tem)
	56	memory_out ();
	57	return tem;
	58	}
	59
	60	static char *
	61	xrealloc (ptr, size)
	62	char *ptr;
	63	unsigned size;
	64	{
	65	register char *tem = realloc (ptr, size);
	66
67	if (!tem)
68	memory_out ();
69	return tem;
70	}
71	#endif /* not emacs */
72	\f
73	/* Assuming STRING is the value of a termcap string entry
74	containing `%' constructs to expand parameters,
75	merge in parameter values and store result in block OUTSTRING points to.
76	LEN is the length of OUTSTRING. If more space is needed,
77	a block is allocated with `malloc'.
78
79	The value returned is the address of the resulting string.
80	This may be OUTSTRING or may be the address of a block got with `malloc'.
81	In the latter case, the caller must free the block.
82
83	The fourth and following args to tparam serve as the parameter values. */
84
85	static char *tparam1 ();
86
87	/* VARARGS 2 */
88	char *
89	tparam (string, outstring, len, arg0, arg1, arg2, arg3)
90	char *string;
91	char *outstring;
92	int len;
93	int arg0, arg1, arg2, arg3;
94	{
e0dd62f6	95	int arg[4];
9e3295f9	96
e0dd62f6 RM	97	arg[0] = arg0;
	98	arg[1] = arg1;
	99	arg[2] = arg2;
	100	arg[3] = arg3;
	101	return tparam1 (string, outstring, len, NULL, NULL, arg);
e0dd62f6 RM	102	}
	103
	104	char *BC;
	105	char *UP;
	106
	107	static char tgoto_buf[50];
	108
	109	char *
	110	tgoto (cm, hpos, vpos)
	111	char *cm;
	112	int hpos, vpos;
	113	{
	114	int args[2];
	115	if (!cm)
	116	return NULL;
	117	args[0] = vpos;
	118	args[1] = hpos;
	119	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	120	}
	121
	122	static char *
	123	tparam1 (string, outstring, len, up, left, argp)
	124	char *string;
	125	char *outstring;
	126	int len;
	127	char up, left;
	128	register int *argp;
	129	{
	130	register int c;
	131	register char *p = string;
	132	register char *op = outstring;
	133	char *outend;
	134	int outlen = 0;
	135
	136	register int tem;
	137	int *old_argp = argp;
	138	int doleft = 0;
	139	int doup = 0;
	140
	141	outend = outstring + len;
	142
	143	while (1)
	144	{
	145	/* If the buffer might be too short, make it bigger. */
	146	if (op + 5 >= outend)
	147	{
	148	register char *new;
	149	if (outlen == 0)
	150	{
	151	outlen = len + 40;
	152	new = (char *) xmalloc (outlen);
	153	outend += 40;
	154	bcopy (outstring, new, op - outstring);
	155	}
	156	else
	157	{
	158	outend += outlen;
	159	outlen *= 2;
	160	new = (char *) xrealloc (outstring, outlen);
	161	}
	162	op += new - outstring;
	163	outend += new - outstring;
	164	outstring = new;
	165	}
166	c = *p++;
167	if (!c)
168	break;
169	if (c == '%')
170	{
171	c = *p++;
172	tem = *argp;
173	switch (c)
174	{
175	case 'd': /* %d means output in decimal. */
176	if (tem < 10)
177	goto onedigit;
178	if (tem < 100)
179	goto twodigit;
180	case '3': /* %3 means output in decimal, 3 digits. */
181	if (tem > 999)
182	{
183	*op++ = tem / 1000 + '0';
184	tem %= 1000;
185	}
186	*op++ = tem / 100 + '0';
187	case '2': /* %2 means output in decimal, 2 digits. */
188	twodigit:
189	tem %= 100;
190	*op++ = tem / 10 + '0';
191	onedigit:
192	*op++ = tem % 10 + '0';
193	argp++;
194	break;
195
196	case 'C':
197	/* For c-100: print quotient of value by 96, if nonzero,
198	then do like %+. */
199	if (tem >= 96)
200	{
201	*op++ = tem / 96;
202	tem %= 96;
203	}
204	case '+': /* %+x means add character code of char x. */
205	tem += *p++;
206	case '.': /* %. means output as character. */
207	if (left)
208	{
209	/* If want to forbid output of 0 and \n and \t,
210	and this is one of them, increment it. */
211	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
212	{
213	tem++;
214	if (argp == old_argp)
215	doup++, outend -= strlen (up);
216	else
217	doleft++, outend -= strlen (left);
218	}
219	}
220	*op++ = tem ? tem : 0200;
221	case 'f': /* %f means discard next arg. */
222	argp++;
223	break;
224
225	case 'b': /* %b means back up one arg (and re-use it). */
226	argp--;
227	break;
228
229	case 'r': /* %r means interchange following two args. */
230	argp[0] = argp[1];
231	argp[1] = tem;
232	old_argp++;
233	break;
234
235	case '>': /* %>xy means if arg is > char code of x, */
236	if (argp[0] > p++) / then add char code of y to the arg, */
237	argp[0] += p; / and in any case don't output. */
238	p++; /* Leave the arg to be output later. */
239	break;
240
241	case 'a': /* %a means arithmetic. */
242	/* Next character says what operation.
243	Add or subtract either a constant or some other arg. */
244	/* First following character is + to add or - to subtract
245	or = to assign. */
246	/* Next following char is 'p' and an arg spec
247	(0100 plus position of that arg relative to this one)
248	or 'c' and a constant stored in a character. */
249	tem = p[2] & 0177;
250	if (p[1] == 'p')
251	tem = argp[tem - 0100];
252	if (p[0] == '-')
253	argp[0] -= tem;
254	else if (p[0] == '+')
255	argp[0] += tem;
256	else if (p[0] == '*')
257	argp[0] *= tem;
258	else if (p[0] == '/')
259	argp[0] /= tem;
260	else
261	argp[0] = tem;
262
263	p += 3;
264	break;
265
266	case 'i': /* %i means add one to arg, */
267	argp[0] ++; /* and leave it to be output later. */
268	argp[1] ++; /* Increment the following arg, too! */
269	break;
270
271	case '%': /* %% means output %; no arg. */
272	goto ordinary;
273
274	case 'n': /* %n means xor each of next two args with 140. */
275	argp[0] ^= 0140;
276	argp[1] ^= 0140;
277	break;
278
279	case 'm': /* %m means xor each of next two args with 177. */
280	argp[0] ^= 0177;
281	argp[1] ^= 0177;
282	break;
283
284	case 'B': /* %B means express arg as BCD char code. */
285	argp[0] += 6 * (tem / 10);
286	break;
287
288	case 'D': /* %D means weird Delta Data transformation. */
289	argp[0] -= 2 * (tem % 16);
290	break;
291	}
292	}
293	else
294	/* Ordinary character in the argument string. */
295	ordinary:
296	*op++ = c;
297	}
298	*op = 0;
299	while (doup-- > 0)
300	strcat (op, up);
301	while (doleft-- > 0)
302	strcat (op, left);
303	return outstring;
304	}
305	\f
306	#ifdef DEBUG
307
308	main (argc, argv)
309	int argc;
310	char **argv;
311	{
312	char buf[50];
313	int args[3];
314	args[0] = atoi (argv[2]);
315	args[1] = atoi (argv[3]);
316	args[2] = atoi (argv[4]);
317	tparam1 (argv[1], buf, "LEFT", "UP", args);
318	printf ("%s\n", buf);
319	return 0;
320	}
321
322	#endif /* DEBUG */