[thirdparty/bash.git] / lib / termcap / 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, 59 Temple Place, Suite 330, Boston, MA 02111 USA.  */

/* Emacs config.h may rename various library functions such as malloc.  */
#ifdef HAVE_CONFIG_H
#include <config.h>

#ifdef HAVE_STDLIB_H 
#  include <stdlib.h>
#else
extern char *getenv ();
extern char *malloc ();
extern char *realloc ();
#endif

#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 */

#include "ltcap.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);
}

__private_extern__ char *BC;
__private_extern__ char *UP;

static char tgoto_buf[50];

__private_extern__
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
726f6388	1	/* Merge parameters into a termcap entry string.
ccc6cda3	2	Copyright (C) 1985, 87, 93, 95 Free Software Foundation, Inc.
726f6388 JA	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
bb70624e JA	15	along with this program; see the file COPYING. If not, write to the
bb70624e JA	16	Free Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
726f6388 JA	17
	18	/* Emacs config.h may rename various library functions such as malloc. */
	19	#ifdef HAVE_CONFIG_H
ccc6cda3	20	#include <config.h>
bb70624e JA	21
	22	#ifdef HAVE_STDLIB_H
	23	# include <stdlib.h>
	24	#else
	25	extern char *getenv ();
	26	extern char *malloc ();
	27	extern char *realloc ();
	28	#endif
	29
726f6388 JA	30	#else /* not HAVE_CONFIG_H */
	31
	32	#if defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)
	33	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	34	#endif
	35
	36	#ifdef STDC_HEADERS
	37	#include <stdlib.h>
	38	#include <string.h>
	39	#else
	40	char *malloc ();
	41	char *realloc ();
	42	#endif
	43
	44	#endif /* not HAVE_CONFIG_H */
	45
bb70624e JA	46	#include "ltcap.h"
bb70624e JA	47
726f6388 JA	48	#ifndef NULL
	49	#define NULL (char *) 0
	50	#endif
	51	\f
	52	#ifndef emacs
	53	static void
	54	memory_out ()
	55	{
	56	write (2, "virtual memory exhausted\n", 25);
	57	exit (1);
	58	}
	59
	60	static char *
	61	xmalloc (size)
	62	unsigned size;
	63	{
	64	register char *tem = malloc (size);
	65
	66	if (!tem)
	67	memory_out ();
	68	return tem;
	69	}
	70
	71	static char *
	72	xrealloc (ptr, size)
	73	char *ptr;
	74	unsigned size;
	75	{
	76	register char *tem = realloc (ptr, size);
	77
	78	if (!tem)
	79	memory_out ();
	80	return tem;
	81	}
	82	#endif /* not emacs */
	83	\f
	84	/* Assuming STRING is the value of a termcap string entry
	85	containing `%' constructs to expand parameters,
	86	merge in parameter values and store result in block OUTSTRING points to.
	87	LEN is the length of OUTSTRING. If more space is needed,
	88	a block is allocated with `malloc'.
	89
	90	The value returned is the address of the resulting string.
	91	This may be OUTSTRING or may be the address of a block got with `malloc'.
	92	In the latter case, the caller must free the block.
	93
	94	The fourth and following args to tparam serve as the parameter values. */
	95
	96	static char *tparam1 ();
	97
	98	/* VARARGS 2 */
	99	char *
	100	tparam (string, outstring, len, arg0, arg1, arg2, arg3)
	101	char *string;
	102	char *outstring;
	103	int len;
	104	int arg0, arg1, arg2, arg3;
	105	{
726f6388	106	int arg[4];
ccc6cda3	107
726f6388 JA	108	arg[0] = arg0;
	109	arg[1] = arg1;
	110	arg[2] = arg2;
	111	arg[3] = arg3;
	112	return tparam1 (string, outstring, len, NULL, NULL, arg);
726f6388 JA	113	}
726f6388 JA	114
bb70624e JA	115	__private_extern__ char *BC;
bb70624e JA	116	__private_extern__ char *UP;
726f6388 JA	117
	118	static char tgoto_buf[50];
	119
bb70624e	120	__private_extern__
726f6388 JA	121	char *
	122	tgoto (cm, hpos, vpos)
	123	char *cm;
	124	int hpos, vpos;
	125	{
	126	int args[2];
	127	if (!cm)
	128	return NULL;
	129	args[0] = vpos;
	130	args[1] = hpos;
	131	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	132	}
	133
	134	static char *
	135	tparam1 (string, outstring, len, up, left, argp)
	136	char *string;
	137	char *outstring;
	138	int len;
	139	char up, left;
	140	register int *argp;
	141	{
	142	register int c;
	143	register char *p = string;
	144	register char *op = outstring;
	145	char *outend;
	146	int outlen = 0;
	147
	148	register int tem;
	149	int *old_argp = argp;
	150	int doleft = 0;
	151	int doup = 0;
	152
	153	outend = outstring + len;
	154
	155	while (1)
	156	{
	157	/* If the buffer might be too short, make it bigger. */
	158	if (op + 5 >= outend)
	159	{
	160	register char *new;
	161	if (outlen == 0)
	162	{
	163	outlen = len + 40;
	164	new = (char *) xmalloc (outlen);
	165	outend += 40;
	166	bcopy (outstring, new, op - outstring);
	167	}
	168	else
	169	{
	170	outend += outlen;
	171	outlen *= 2;
	172	new = (char *) xrealloc (outstring, outlen);
	173	}
	174	op += new - outstring;
	175	outend += new - outstring;
	176	outstring = new;
	177	}
	178	c = *p++;
	179	if (!c)
	180	break;
	181	if (c == '%')
	182	{
	183	c = *p++;
	184	tem = *argp;
185	switch (c)
186	{
187	case 'd': /* %d means output in decimal. */
188	if (tem < 10)
189	goto onedigit;
190	if (tem < 100)
191	goto twodigit;
192	case '3': /* %3 means output in decimal, 3 digits. */
193	if (tem > 999)
194	{
195	*op++ = tem / 1000 + '0';
196	tem %= 1000;
197	}
198	*op++ = tem / 100 + '0';
199	case '2': /* %2 means output in decimal, 2 digits. */
200	twodigit:
201	tem %= 100;
202	*op++ = tem / 10 + '0';
203	onedigit:
204	*op++ = tem % 10 + '0';
205	argp++;
206	break;
207
208	case 'C':
209	/* For c-100: print quotient of value by 96, if nonzero,
210	then do like %+. */
211	if (tem >= 96)
212	{
213	*op++ = tem / 96;
214	tem %= 96;
215	}
216	case '+': /* %+x means add character code of char x. */
217	tem += *p++;
218	case '.': /* %. means output as character. */
219	if (left)
220	{
221	/* If want to forbid output of 0 and \n and \t,
222	and this is one of them, increment it. */
223	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
224	{
225	tem++;
226	if (argp == old_argp)
227	doup++, outend -= strlen (up);
228	else
229	doleft++, outend -= strlen (left);
230	}
231	}
232	*op++ = tem ? tem : 0200;
233	case 'f': /* %f means discard next arg. */
234	argp++;
235	break;
236
237	case 'b': /* %b means back up one arg (and re-use it). */
238	argp--;
239	break;
240
241	case 'r': /* %r means interchange following two args. */
242	argp[0] = argp[1];
243	argp[1] = tem;
244	old_argp++;
245	break;
246
247	case '>': /* %>xy means if arg is > char code of x, */
248	if (argp[0] > p++) / then add char code of y to the arg, */
249	argp[0] += p; / and in any case don't output. */
250	p++; /* Leave the arg to be output later. */
251	break;
252
253	case 'a': /* %a means arithmetic. */
254	/* Next character says what operation.
255	Add or subtract either a constant or some other arg. */
256	/* First following character is + to add or - to subtract
257	or = to assign. */
258	/* Next following char is 'p' and an arg spec
259	(0100 plus position of that arg relative to this one)
260	or 'c' and a constant stored in a character. */
261	tem = p[2] & 0177;
262	if (p[1] == 'p')
263	tem = argp[tem - 0100];
264	if (p[0] == '-')
265	argp[0] -= tem;
266	else if (p[0] == '+')
267	argp[0] += tem;
268	else if (p[0] == '*')
269	argp[0] *= tem;
270	else if (p[0] == '/')
271	argp[0] /= tem;
272	else
273	argp[0] = tem;
274
275	p += 3;
276	break;
277
278	case 'i': /* %i means add one to arg, */
279	argp[0] ++; /* and leave it to be output later. */
280	argp[1] ++; /* Increment the following arg, too! */
281	break;
282
283	case '%': /* %% means output %; no arg. */
284	goto ordinary;
285
286	case 'n': /* %n means xor each of next two args with 140. */
287	argp[0] ^= 0140;
288	argp[1] ^= 0140;
289	break;
290
291	case 'm': /* %m means xor each of next two args with 177. */
292	argp[0] ^= 0177;
293	argp[1] ^= 0177;
294	break;
295
296	case 'B': /* %B means express arg as BCD char code. */
297	argp[0] += 6 * (tem / 10);
298	break;
299
300	case 'D': /* %D means weird Delta Data transformation. */
301	argp[0] -= 2 * (tem % 16);
302	break;
303	}
304	}
305	else
306	/* Ordinary character in the argument string. */
307	ordinary:
308	*op++ = c;
309	}
310	*op = 0;
311	while (doup-- > 0)
312	strcat (op, up);
313	while (doleft-- > 0)
314	strcat (op, left);
315	return outstring;
316	}
317	\f
318	#ifdef DEBUG
319
320	main (argc, argv)
321	int argc;
322	char **argv;
323	{
324	char buf[50];
325	int args[3];
326	args[0] = atoi (argv[2]);
327	args[1] = atoi (argv[3]);
328	args[2] = atoi (argv[4]);
329	tparam1 (argv[1], buf, "LEFT", "UP", args);
330	printf ("%s\n", buf);
331	return 0;
332	}
333
334	#endif /* DEBUG */