[thirdparty/bash.git] / lib / termcap / tparam.c

/* tparam.c - merge parameters into a termcap entry string. */

/* Copyright (C) 1985, 1986, 1993,1994, 1995, 1998, 2001,2003,2005,2006,2008,2009 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash 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 3 of the License, or
   (at your option) any later version.

   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
*/

/* 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

#if defined (HAVE_STRING_H)
#include <string.h>
#endif

#if !defined (HAVE_BCOPY) && (defined (HAVE_STRING_H) || defined (STDC_HEADERS))
#  define bcopy(s, d, n)	memcpy ((d), (s), (n))
#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
3185942a JA	1	/* tparam.c - merge parameters into a termcap entry string. */
	2
	3	/* Copyright (C) 1985, 1986, 1993,1994, 1995, 1998, 2001,2003,2005,2006,2008,2009 Free Software Foundation, Inc.
	4
	5	This file is part of GNU Bash, the Bourne Again SHell.
	6
	7	Bash is free software: you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation, either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	Bash is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with Bash. If not, see <http://www.gnu.org/licenses/>.
	19	*/
726f6388 JA	20
	21	/* Emacs config.h may rename various library functions such as malloc. */
	22	#ifdef HAVE_CONFIG_H
ccc6cda3	23	#include <config.h>
bb70624e JA	24
	25	#ifdef HAVE_STDLIB_H
	26	# include <stdlib.h>
	27	#else
	28	extern char *getenv ();
	29	extern char *malloc ();
	30	extern char *realloc ();
	31	#endif
	32
0628567a JA	33	#if defined (HAVE_STRING_H)
	34	#include <string.h>
	35	#endif
	36
	37	#if !defined (HAVE_BCOPY) && (defined (HAVE_STRING_H) \|\| defined (STDC_HEADERS))
	38	# define bcopy(s, d, n) memcpy ((d), (s), (n))
	39	#endif
	40
726f6388 JA	41	#else /* not HAVE_CONFIG_H */
	42
	43	#if defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)
	44	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	45	#endif
	46
	47	#ifdef STDC_HEADERS
	48	#include <stdlib.h>
	49	#include <string.h>
	50	#else
	51	char *malloc ();
	52	char *realloc ();
	53	#endif
	54
	55	#endif /* not HAVE_CONFIG_H */
	56
bb70624e JA	57	#include "ltcap.h"
bb70624e JA	58
726f6388 JA	59	#ifndef NULL
	60	#define NULL (char *) 0
	61	#endif
	62	\f
	63	#ifndef emacs
	64	static void
	65	memory_out ()
	66	{
	67	write (2, "virtual memory exhausted\n", 25);
	68	exit (1);
	69	}
	70
	71	static char *
	72	xmalloc (size)
	73	unsigned size;
	74	{
	75	register char *tem = malloc (size);
	76
	77	if (!tem)
	78	memory_out ();
	79	return tem;
	80	}
	81
	82	static char *
	83	xrealloc (ptr, size)
	84	char *ptr;
	85	unsigned size;
	86	{
	87	register char *tem = realloc (ptr, size);
	88
	89	if (!tem)
	90	memory_out ();
	91	return tem;
	92	}
	93	#endif /* not emacs */
	94	\f
	95	/* Assuming STRING is the value of a termcap string entry
	96	containing `%' constructs to expand parameters,
	97	merge in parameter values and store result in block OUTSTRING points to.
	98	LEN is the length of OUTSTRING. If more space is needed,
	99	a block is allocated with `malloc'.
	100
	101	The value returned is the address of the resulting string.
	102	This may be OUTSTRING or may be the address of a block got with `malloc'.
	103	In the latter case, the caller must free the block.
	104
	105	The fourth and following args to tparam serve as the parameter values. */
	106
	107	static char *tparam1 ();
	108
	109	/* VARARGS 2 */
	110	char *
	111	tparam (string, outstring, len, arg0, arg1, arg2, arg3)
	112	char *string;
	113	char *outstring;
	114	int len;
	115	int arg0, arg1, arg2, arg3;
	116	{
726f6388	117	int arg[4];
ccc6cda3	118
726f6388 JA	119	arg[0] = arg0;
	120	arg[1] = arg1;
	121	arg[2] = arg2;
	122	arg[3] = arg3;
	123	return tparam1 (string, outstring, len, NULL, NULL, arg);
726f6388 JA	124	}
726f6388 JA	125
bb70624e JA	126	__private_extern__ char *BC;
bb70624e JA	127	__private_extern__ char *UP;
726f6388 JA	128
	129	static char tgoto_buf[50];
	130
bb70624e	131	__private_extern__
726f6388 JA	132	char *
	133	tgoto (cm, hpos, vpos)
	134	char *cm;
	135	int hpos, vpos;
	136	{
	137	int args[2];
	138	if (!cm)
	139	return NULL;
	140	args[0] = vpos;
	141	args[1] = hpos;
	142	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	143	}
	144
	145	static char *
	146	tparam1 (string, outstring, len, up, left, argp)
	147	char *string;
	148	char *outstring;
	149	int len;
	150	char up, left;
	151	register int *argp;
	152	{
	153	register int c;
	154	register char *p = string;
	155	register char *op = outstring;
	156	char *outend;
	157	int outlen = 0;
	158
	159	register int tem;
	160	int *old_argp = argp;
	161	int doleft = 0;
	162	int doup = 0;
	163
	164	outend = outstring + len;
	165
	166	while (1)
	167	{
	168	/* If the buffer might be too short, make it bigger. */
	169	if (op + 5 >= outend)
	170	{
	171	register char *new;
	172	if (outlen == 0)
	173	{
	174	outlen = len + 40;
	175	new = (char *) xmalloc (outlen);
	176	outend += 40;
	177	bcopy (outstring, new, op - outstring);
	178	}
	179	else
	180	{
	181	outend += outlen;
	182	outlen *= 2;
	183	new = (char *) xrealloc (outstring, outlen);
	184	}
	185	op += new - outstring;
	186	outend += new - outstring;
	187	outstring = new;
	188	}
	189	c = *p++;
	190	if (!c)
	191	break;
	192	if (c == '%')
	193	{
	194	c = *p++;
	195	tem = *argp;
196	switch (c)
197	{
198	case 'd': /* %d means output in decimal. */
199	if (tem < 10)
200	goto onedigit;
201	if (tem < 100)
202	goto twodigit;
203	case '3': /* %3 means output in decimal, 3 digits. */
204	if (tem > 999)
205	{
206	*op++ = tem / 1000 + '0';
207	tem %= 1000;
208	}
209	*op++ = tem / 100 + '0';
210	case '2': /* %2 means output in decimal, 2 digits. */
211	twodigit:
212	tem %= 100;
213	*op++ = tem / 10 + '0';
214	onedigit:
215	*op++ = tem % 10 + '0';
216	argp++;
217	break;
218
219	case 'C':
220	/* For c-100: print quotient of value by 96, if nonzero,
221	then do like %+. */
222	if (tem >= 96)
223	{
224	*op++ = tem / 96;
225	tem %= 96;
226	}
227	case '+': /* %+x means add character code of char x. */
228	tem += *p++;
229	case '.': /* %. means output as character. */
230	if (left)
231	{
232	/* If want to forbid output of 0 and \n and \t,
233	and this is one of them, increment it. */
234	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
235	{
236	tem++;
237	if (argp == old_argp)
238	doup++, outend -= strlen (up);
239	else
240	doleft++, outend -= strlen (left);
241	}
242	}
243	*op++ = tem ? tem : 0200;
244	case 'f': /* %f means discard next arg. */
245	argp++;
246	break;
247
248	case 'b': /* %b means back up one arg (and re-use it). */
249	argp--;
250	break;
251
252	case 'r': /* %r means interchange following two args. */
253	argp[0] = argp[1];
254	argp[1] = tem;
255	old_argp++;
256	break;
257
258	case '>': /* %>xy means if arg is > char code of x, */
259	if (argp[0] > p++) / then add char code of y to the arg, */
260	argp[0] += p; / and in any case don't output. */
261	p++; /* Leave the arg to be output later. */
262	break;
263
264	case 'a': /* %a means arithmetic. */
265	/* Next character says what operation.
266	Add or subtract either a constant or some other arg. */
267	/* First following character is + to add or - to subtract
268	or = to assign. */
269	/* Next following char is 'p' and an arg spec
270	(0100 plus position of that arg relative to this one)
271	or 'c' and a constant stored in a character. */
272	tem = p[2] & 0177;
273	if (p[1] == 'p')
274	tem = argp[tem - 0100];
275	if (p[0] == '-')
276	argp[0] -= tem;
277	else if (p[0] == '+')
278	argp[0] += tem;
279	else if (p[0] == '*')
280	argp[0] *= tem;
281	else if (p[0] == '/')
282	argp[0] /= tem;
283	else
284	argp[0] = tem;
285
286	p += 3;
287	break;
288
289	case 'i': /* %i means add one to arg, */
290	argp[0] ++; /* and leave it to be output later. */
291	argp[1] ++; /* Increment the following arg, too! */
292	break;
293
294	case '%': /* %% means output %; no arg. */
295	goto ordinary;
296
297	case 'n': /* %n means xor each of next two args with 140. */
298	argp[0] ^= 0140;
299	argp[1] ^= 0140;
300	break;
301
302	case 'm': /* %m means xor each of next two args with 177. */
303	argp[0] ^= 0177;
304	argp[1] ^= 0177;
305	break;
306
307	case 'B': /* %B means express arg as BCD char code. */
308	argp[0] += 6 * (tem / 10);
309	break;
310
311	case 'D': /* %D means weird Delta Data transformation. */
312	argp[0] -= 2 * (tem % 16);
313	break;
314	}
315	}
316	else
317	/* Ordinary character in the argument string. */
318	ordinary:
319	*op++ = c;
320	}
321	*op = 0;
322	while (doup-- > 0)
323	strcat (op, up);
324	while (doleft-- > 0)
325	strcat (op, left);
326	return outstring;
327	}
328	\f
329	#ifdef DEBUG
330
331	main (argc, argv)
332	int argc;
333	char **argv;
334	{
335	char buf[50];
336	int args[3];
337	args[0] = atoi (argv[2]);
338	args[1] = atoi (argv[3]);
339	args[2] = atoi (argv[4]);
340	tparam1 (argv[1], buf, "LEFT", "UP", args);
341	printf ("%s\n", buf);
342	return 0;
343	}
344
345	#endif /* DEBUG */