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

/* Merge parameters into a termcap entry string.
   Copyright (C) 1985, 1987, 1993, 1995, 2000, 2001, 2002, 2003, 2004,
                 2005, 2006, 2007, 2008  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 <setjmp.h>
#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 (char *string, char *outstring, int len, char *up, char *left, register int *argp);

/* VARARGS 2 */
char *
tparam (char *string, char *outstring, int len, int arg0, int arg1, int arg2, int 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 (char *cm, int hpos, int 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 (char *string, char *outstring, int len, char *up, char *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.
429ab54e	2	Copyright (C) 1985, 1987, 1993, 1995, 2000, 2001, 2002, 2003, 2004,
0a64641e	3	2005, 2006, 2007, 2008 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	25	#ifdef emacs
d7306fe6	26	#include <setjmp.h>
83c2ece5 DL	27	#include "lisp.h" /* for xmalloc */
83c2ece5 DL	28	#else
e0dd62f6 RM	29
	30	#ifdef STDC_HEADERS
	31	#include <stdlib.h>
	32	#include <string.h>
	33	#else
	34	char *malloc ();
	35	char *realloc ();
	36	#endif
	37
71091322 RS	38	/* Do this after the include, in case string.h prototypes bcopy. */
	39	#if (defined(HAVE_STRING_H) \|\| defined(STDC_HEADERS)) && !defined(bcopy)
	40	#define bcopy(s, d, n) memcpy ((d), (s), (n))
	41	#endif
	42
c70c2705	43	#endif /* not emacs */
e0dd62f6 RM	44
	45	#ifndef NULL
	46	#define NULL (char *) 0
	47	#endif
	48	\f
	49	#ifndef emacs
	50	static void
	51	memory_out ()
	52	{
	53	write (2, "virtual memory exhausted\n", 25);
	54	exit (1);
	55	}
	56
	57	static char *
	58	xmalloc (size)
	59	unsigned size;
	60	{
	61	register char *tem = malloc (size);
	62
	63	if (!tem)
	64	memory_out ();
	65	return tem;
	66	}
	67
	68	static char *
	69	xrealloc (ptr, size)
	70	char *ptr;
	71	unsigned size;
	72	{
	73	register char *tem = realloc (ptr, size);
	74
	75	if (!tem)
	76	memory_out ();
	77	return tem;
	78	}
	79	#endif /* not emacs */
	80	\f
	81	/* Assuming STRING is the value of a termcap string entry
	82	containing `%' constructs to expand parameters,
	83	merge in parameter values and store result in block OUTSTRING points to.
	84	LEN is the length of OUTSTRING. If more space is needed,
	85	a block is allocated with `malloc'.
	86
	87	The value returned is the address of the resulting string.
	88	This may be OUTSTRING or may be the address of a block got with `malloc'.
	89	In the latter case, the caller must free the block.
	90
	91	The fourth and following args to tparam serve as the parameter values. */
	92
971de7fb	93	static char tparam1 (char string, char outstring, int len, char up, char left, register int argp);
e0dd62f6 RM	94
	95	/* VARARGS 2 */
	96	char *
971de7fb	97	tparam (char string, char outstring, int len, int arg0, int arg1, int arg2, int arg3)
e0dd62f6	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 *
971de7fb	114	tgoto (char *cm, int hpos, int vpos)
e0dd62f6 RM	115	{
	116	int args[2];
	117	if (!cm)
	118	return NULL;
	119	args[0] = vpos;
	120	args[1] = hpos;
	121	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	122	}
	123
	124	static char *
971de7fb	125	tparam1 (char string, char outstring, int len, char up, char left, register int *argp)
e0dd62f6 RM	126	{
	127	register int c;
	128	register char *p = string;
	129	register char *op = outstring;
	130	char *outend;
	131	int outlen = 0;
	132
	133	register int tem;
9ad4bf7a TTN	134	int old_argp = argp; / can move */
	135	int fixed_argp = argp; / never moves */
	136	int explicit_param_p = 0; /* set by %p */
e0dd62f6 RM	137	int doleft = 0;
	138	int doup = 0;
	139
	140	outend = outstring + len;
	141
	142	while (1)
	143	{
	144	/* If the buffer might be too short, make it bigger. */
	145	if (op + 5 >= outend)
	146	{
	147	register char *new;
b5e55477 GM	148	int offset = op - outstring;
b5e55477 GM	149
e0dd62f6 RM	150	if (outlen == 0)
	151	{
	152	outlen = len + 40;
	153	new = (char *) xmalloc (outlen);
b5e55477	154	bcopy (outstring, new, offset);
e0dd62f6 RM	155	}
	156	else
	157	{
e0dd62f6 RM	158	outlen *= 2;
	159	new = (char *) xrealloc (outstring, outlen);
	160	}
177c0ea7	161
b5e55477 GM	162	op = new + offset;
b5e55477 GM	163	outend = new + outlen;
e0dd62f6 RM	164	outstring = new;
	165	}
	166	c = *p++;
	167	if (!c)
	168	break;
	169	if (c == '%')
	170	{
	171	c = *p++;
9ad4bf7a TTN	172	if (explicit_param_p)
	173	explicit_param_p = 0;
	174	else
	175	tem = *argp;
e0dd62f6 RM	176	switch (c)
	177	{
	178	case 'd': /* %d means output in decimal. */
	179	if (tem < 10)
	180	goto onedigit;
	181	if (tem < 100)
	182	goto twodigit;
	183	case '3': /* %3 means output in decimal, 3 digits. */
	184	if (tem > 999)
	185	{
	186	*op++ = tem / 1000 + '0';
	187	tem %= 1000;
	188	}
	189	*op++ = tem / 100 + '0';
	190	case '2': /* %2 means output in decimal, 2 digits. */
	191	twodigit:
	192	tem %= 100;
	193	*op++ = tem / 10 + '0';
	194	onedigit:
	195	*op++ = tem % 10 + '0';
	196	argp++;
	197	break;
9ad4bf7a TTN	198	case 'p': /* %pN means use param N for next subst. */
	199	tem = fixed_argp[(*p++) - '1'];
	200	explicit_param_p = 1;
	201	break;
e0dd62f6 RM	202	case 'C':
	203	/* For c-100: print quotient of value by 96, if nonzero,
	204	then do like %+. */
	205	if (tem >= 96)
	206	{
	207	*op++ = tem / 96;
	208	tem %= 96;
	209	}
	210	case '+': /* %+x means add character code of char x. */
	211	tem += *p++;
	212	case '.': /* %. means output as character. */
	213	if (left)
	214	{
	215	/* If want to forbid output of 0 and \n and \t,
	216	and this is one of them, increment it. */
	217	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
	218	{
	219	tem++;
	220	if (argp == old_argp)
	221	doup++, outend -= strlen (up);
	222	else
	223	doleft++, outend -= strlen (left);
	224	}
	225	}
	226	*op++ = tem ? tem : 0200;
	227	case 'f': /* %f means discard next arg. */
	228	argp++;
	229	break;
	230
	231	case 'b': /* %b means back up one arg (and re-use it). */
	232	argp--;
	233	break;
	234
	235	case 'r': /* %r means interchange following two args. */
	236	argp[0] = argp[1];
	237	argp[1] = tem;
	238	old_argp++;
	239	break;
	240
	241	case '>': /* %>xy means if arg is > char code of x, */
	242	if (argp[0] > p++) / then add char code of y to the arg, */
	243	argp[0] += p; / and in any case don't output. */
	244	p++; /* Leave the arg to be output later. */
	245	break;
	246
	247	case 'a': /* %a means arithmetic. */
	248	/* Next character says what operation.
	249	Add or subtract either a constant or some other arg. */
	250	/* First following character is + to add or - to subtract
	251	or = to assign. */
	252	/* Next following char is 'p' and an arg spec
	253	(0100 plus position of that arg relative to this one)
	254	or 'c' and a constant stored in a character. */
	255	tem = p[2] & 0177;
	256	if (p[1] == 'p')
	257	tem = argp[tem - 0100];
	258	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 if (p[0] == '/')
	265	argp[0] /= tem;
266	else
267	argp[0] = tem;
268
269	p += 3;
270	break;
271
272	case 'i': /* %i means add one to arg, */
273	argp[0] ++; /* and leave it to be output later. */
274	argp[1] ++; /* Increment the following arg, too! */
275	break;
276
277	case '%': /* %% means output %; no arg. */
278	goto ordinary;
279
280	case 'n': /* %n means xor each of next two args with 140. */
281	argp[0] ^= 0140;
282	argp[1] ^= 0140;
283	break;
284
285	case 'm': /* %m means xor each of next two args with 177. */
286	argp[0] ^= 0177;
287	argp[1] ^= 0177;
288	break;
289
290	case 'B': /* %B means express arg as BCD char code. */
291	argp[0] += 6 * (tem / 10);
292	break;
293
294	case 'D': /* %D means weird Delta Data transformation. */
295	argp[0] -= 2 * (tem % 16);
296	break;
45e0dd95 GM	297
	298	default:
	299	abort ();
e0dd62f6 RM	300	}
	301	}
	302	else
	303	/* Ordinary character in the argument string. */
	304	ordinary:
	305	*op++ = c;
	306	}
	307	*op = 0;
	308	while (doup-- > 0)
	309	strcat (op, up);
	310	while (doleft-- > 0)
	311	strcat (op, left);
	312	return outstring;
	313	}
	314	\f
	315	#ifdef DEBUG
	316
	317	main (argc, argv)
	318	int argc;
	319	char **argv;
	320	{
	321	char buf[50];
	322	int args[3];
	323	args[0] = atoi (argv[2]);
	324	args[1] = atoi (argv[3]);
	325	args[2] = atoi (argv[4]);
	326	tparam1 (argv[1], buf, "LEFT", "UP", args);
	327	printf ("%s\n", buf);
	328	return 0;
	329	}
	330
	331	#endif /* DEBUG */
ab5796a9 MB	332
	333	/* arch-tag: 83f7b5ac-a808-4f75-b87a-123de009b402
	334	(do not change this comment) */