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

/* Merge parameters into a termcap entry string.
   Copyright (C) 1985, 1987, 1993, 1995, 2000, 2002, 2003, 2004,
                 2005, 2006 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, 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

#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#else
char *malloc ();
char *realloc ();
#endif

/* Do this after the include, in case string.h prototypes bcopy.  */
#if (defined(HAVE_STRING_H) || defined(STDC_HEADERS)) && !defined(bcopy)
#define bcopy(s, d, n) memcpy ((d), (s), (n))
#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);
}

/* These are already defined in the System framework in Mac OS X and
   cause prebinding to fail.  */
#ifndef MAC_OSX
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);
}
#endif

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;                 /* can move */
  int *fixed_argp = argp;               /* never moves */
  int explicit_param_p = 0;             /* set by %p */
  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;
	  int offset = op - outstring;

	  if (outlen == 0)
	    {
	      outlen = len + 40;
	      new = (char *) xmalloc (outlen);
	      bcopy (outstring, new, offset);
	    }
	  else
	    {
	      outlen *= 2;
	      new = (char *) xrealloc (outstring, outlen);
	    }

	  op = new + offset;
	  outend = new + outlen;
	  outstring = new;
	}
      c = *p++;
      if (!c)
	break;
      if (c == '%')
	{
	  c = *p++;
	  if (explicit_param_p)
	    explicit_param_p = 0;
	  else
	    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 'p':           /* %pN means use param N for next subst.  */
	      tem = fixed_argp[(*p++) - '1'];
	      explicit_param_p = 1;
	      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 */

/* arch-tag: 83f7b5ac-a808-4f75-b87a-123de009b402
   (do not change this comment) */
Commit	Line	Data
e0dd62f6	1	/* Merge parameters into a termcap entry string.
0b5538bd	2	Copyright (C) 1985, 1987, 1993, 1995, 2000, 2002, 2003, 2004,
aaef169d	3	2005, 2006 Free Software Foundation, Inc.
e0dd62f6 RM	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2, or (at your option)
	8	any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; see the file COPYING. If not, write to
4fc5845f LK	17	the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
4fc5845f LK	18	Boston, MA 02110-1301, USA. */
e0dd62f6 RM	19
	20	/* Emacs config.h may rename various library functions such as malloc. */
	21	#ifdef HAVE_CONFIG_H
	22	#include <config.h>
c70c2705	23	#endif
e0dd62f6	24
83c2ece5 DL	25	#ifdef emacs
	26	#include "lisp.h" /* for xmalloc */
	27	#else
e0dd62f6 RM	28
	29	#ifdef STDC_HEADERS
	30	#include <stdlib.h>
	31	#include <string.h>
	32	#else
	33	char *malloc ();
	34	char *realloc ();
	35	#endif
	36
71091322 RS	37	/* Do this after the include, in case string.h prototypes bcopy. */
	38	#if (defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)) && !defined(bcopy)
	39	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	40	#endif
	41
c70c2705	42	#endif /* not emacs */
e0dd62f6 RM	43
	44	#ifndef NULL
	45	#define NULL (char *) 0
	46	#endif
	47	\f
	48	#ifndef emacs
	49	static void
	50	memory_out ()
	51	{
	52	write (2, "virtual memory exhausted\n", 25);
	53	exit (1);
	54	}
	55
	56	static char *
	57	xmalloc (size)
	58	unsigned size;
	59	{
	60	register char *tem = malloc (size);
	61
	62	if (!tem)
	63	memory_out ();
	64	return tem;
	65	}
	66
	67	static char *
	68	xrealloc (ptr, size)
	69	char *ptr;
	70	unsigned size;
	71	{
	72	register char *tem = realloc (ptr, size);
	73
	74	if (!tem)
	75	memory_out ();
	76	return tem;
	77	}
	78	#endif /* not emacs */
	79	\f
	80	/* Assuming STRING is the value of a termcap string entry
	81	containing `%' constructs to expand parameters,
	82	merge in parameter values and store result in block OUTSTRING points to.
	83	LEN is the length of OUTSTRING. If more space is needed,
	84	a block is allocated with `malloc'.
	85
	86	The value returned is the address of the resulting string.
	87	This may be OUTSTRING or may be the address of a block got with `malloc'.
	88	In the latter case, the caller must free the block.
	89
	90	The fourth and following args to tparam serve as the parameter values. */
	91
	92	static char *tparam1 ();
	93
	94	/* VARARGS 2 */
	95	char *
	96	tparam (string, outstring, len, arg0, arg1, arg2, arg3)
	97	char *string;
	98	char *outstring;
	99	int len;
	100	int arg0, arg1, arg2, arg3;
	101	{
e0dd62f6	102	int arg[4];
9e3295f9	103
e0dd62f6 RM	104	arg[0] = arg0;
	105	arg[1] = arg1;
	106	arg[2] = arg2;
	107	arg[3] = arg3;
	108	return tparam1 (string, outstring, len, NULL, NULL, arg);
e0dd62f6 RM	109	}
e0dd62f6 RM	110
e0f712ba AC	111	/* These are already defined in the System framework in Mac OS X and
	112	cause prebinding to fail. */
	113	#ifndef MAC_OSX
e0dd62f6 RM	114	char *BC;
	115	char *UP;
	116
	117	static char tgoto_buf[50];
	118
	119	char *
	120	tgoto (cm, hpos, vpos)
	121	char *cm;
	122	int hpos, vpos;
	123	{
	124	int args[2];
	125	if (!cm)
	126	return NULL;
	127	args[0] = vpos;
	128	args[1] = hpos;
	129	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	130	}
e0f712ba	131	#endif
e0dd62f6 RM	132
	133	static char *
	134	tparam1 (string, outstring, len, up, left, argp)
	135	char *string;
	136	char *outstring;
	137	int len;
	138	char up, left;
	139	register int *argp;
	140	{
	141	register int c;
	142	register char *p = string;
	143	register char *op = outstring;
	144	char *outend;
	145	int outlen = 0;
	146
	147	register int tem;
9ad4bf7a TTN	148	int old_argp = argp; / can move */
	149	int fixed_argp = argp; / never moves */
	150	int explicit_param_p = 0; /* set by %p */
e0dd62f6 RM	151	int doleft = 0;
	152	int doup = 0;
	153
	154	outend = outstring + len;
	155
	156	while (1)
	157	{
	158	/* If the buffer might be too short, make it bigger. */
	159	if (op + 5 >= outend)
	160	{
	161	register char *new;
b5e55477 GM	162	int offset = op - outstring;
b5e55477 GM	163
e0dd62f6 RM	164	if (outlen == 0)
	165	{
	166	outlen = len + 40;
	167	new = (char *) xmalloc (outlen);
b5e55477	168	bcopy (outstring, new, offset);
e0dd62f6 RM	169	}
	170	else
	171	{
e0dd62f6 RM	172	outlen *= 2;
	173	new = (char *) xrealloc (outstring, outlen);
	174	}
177c0ea7	175
b5e55477 GM	176	op = new + offset;
b5e55477 GM	177	outend = new + outlen;
e0dd62f6 RM	178	outstring = new;
	179	}
	180	c = *p++;
	181	if (!c)
	182	break;
	183	if (c == '%')
	184	{
	185	c = *p++;
9ad4bf7a TTN	186	if (explicit_param_p)
	187	explicit_param_p = 0;
	188	else
	189	tem = *argp;
e0dd62f6 RM	190	switch (c)
	191	{
	192	case 'd': /* %d means output in decimal. */
	193	if (tem < 10)
	194	goto onedigit;
	195	if (tem < 100)
	196	goto twodigit;
	197	case '3': /* %3 means output in decimal, 3 digits. */
	198	if (tem > 999)
	199	{
	200	*op++ = tem / 1000 + '0';
	201	tem %= 1000;
	202	}
	203	*op++ = tem / 100 + '0';
	204	case '2': /* %2 means output in decimal, 2 digits. */
	205	twodigit:
	206	tem %= 100;
	207	*op++ = tem / 10 + '0';
	208	onedigit:
	209	*op++ = tem % 10 + '0';
	210	argp++;
	211	break;
9ad4bf7a TTN	212	case 'p': /* %pN means use param N for next subst. */
	213	tem = fixed_argp[(*p++) - '1'];
	214	explicit_param_p = 1;
	215	break;
e0dd62f6 RM	216	case 'C':
	217	/* For c-100: print quotient of value by 96, if nonzero,
	218	then do like %+. */
	219	if (tem >= 96)
	220	{
	221	*op++ = tem / 96;
	222	tem %= 96;
	223	}
	224	case '+': /* %+x means add character code of char x. */
	225	tem += *p++;
	226	case '.': /* %. means output as character. */
	227	if (left)
	228	{
	229	/* If want to forbid output of 0 and \n and \t,
	230	and this is one of them, increment it. */
	231	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
	232	{
	233	tem++;
	234	if (argp == old_argp)
	235	doup++, outend -= strlen (up);
	236	else
	237	doleft++, outend -= strlen (left);
	238	}
	239	}
	240	*op++ = tem ? tem : 0200;
	241	case 'f': /* %f means discard next arg. */
	242	argp++;
	243	break;
	244
	245	case 'b': /* %b means back up one arg (and re-use it). */
	246	argp--;
	247	break;
	248
	249	case 'r': /* %r means interchange following two args. */
	250	argp[0] = argp[1];
	251	argp[1] = tem;
	252	old_argp++;
	253	break;
	254
	255	case '>': /* %>xy means if arg is > char code of x, */
	256	if (argp[0] > p++) / then add char code of y to the arg, */
	257	argp[0] += p; / and in any case don't output. */
	258	p++; /* Leave the arg to be output later. */
	259	break;
	260
	261	case 'a': /* %a means arithmetic. */
	262	/* Next character says what operation.
	263	Add or subtract either a constant or some other arg. */
	264	/* First following character is + to add or - to subtract
	265	or = to assign. */
	266	/* Next following char is 'p' and an arg spec
	267	(0100 plus position of that arg relative to this one)
	268	or 'c' and a constant stored in a character. */
	269	tem = p[2] & 0177;
	270	if (p[1] == 'p')
	271	tem = argp[tem - 0100];
	272	if (p[0] == '-')
	273	argp[0] -= tem;
	274	else if (p[0] == '+')
	275	argp[0] += tem;
	276	else if (p[0] == '*')
	277	argp[0] *= tem;
	278	else if (p[0] == '/')
	279	argp[0] /= tem;
280	else
281	argp[0] = tem;
282
283	p += 3;
284	break;
285
286	case 'i': /* %i means add one to arg, */
287	argp[0] ++; /* and leave it to be output later. */
288	argp[1] ++; /* Increment the following arg, too! */
289	break;
290
291	case '%': /* %% means output %; no arg. */
292	goto ordinary;
293
294	case 'n': /* %n means xor each of next two args with 140. */
295	argp[0] ^= 0140;
296	argp[1] ^= 0140;
297	break;
298
299	case 'm': /* %m means xor each of next two args with 177. */
300	argp[0] ^= 0177;
301	argp[1] ^= 0177;
302	break;
303
304	case 'B': /* %B means express arg as BCD char code. */
305	argp[0] += 6 * (tem / 10);
306	break;
307
308	case 'D': /* %D means weird Delta Data transformation. */
309	argp[0] -= 2 * (tem % 16);
310	break;
45e0dd95 GM	311
	312	default:
	313	abort ();
e0dd62f6 RM	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 */
ab5796a9 MB	346
	347	/* arch-tag: 83f7b5ac-a808-4f75-b87a-123de009b402
	348	(do not change this comment) */