[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

#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);
	      memcpy (new, outstring, 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
c70c2705	38	#endif /* not emacs */
e0dd62f6 RM	39
	40	#ifndef NULL
	41	#define NULL (char *) 0
	42	#endif
	43	\f
	44	#ifndef emacs
	45	static void
	46	memory_out ()
	47	{
	48	write (2, "virtual memory exhausted\n", 25);
	49	exit (1);
	50	}
	51
	52	static char *
	53	xmalloc (size)
	54	unsigned size;
	55	{
	56	register char *tem = malloc (size);
	57
	58	if (!tem)
	59	memory_out ();
	60	return tem;
	61	}
	62
	63	static char *
	64	xrealloc (ptr, size)
	65	char *ptr;
	66	unsigned size;
	67	{
	68	register char *tem = realloc (ptr, size);
	69
	70	if (!tem)
	71	memory_out ();
	72	return tem;
	73	}
	74	#endif /* not emacs */
	75	\f
	76	/* Assuming STRING is the value of a termcap string entry
	77	containing `%' constructs to expand parameters,
	78	merge in parameter values and store result in block OUTSTRING points to.
	79	LEN is the length of OUTSTRING. If more space is needed,
	80	a block is allocated with `malloc'.
	81
	82	The value returned is the address of the resulting string.
	83	This may be OUTSTRING or may be the address of a block got with `malloc'.
	84	In the latter case, the caller must free the block.
	85
	86	The fourth and following args to tparam serve as the parameter values. */
	87
971de7fb	88	static char tparam1 (char string, char outstring, int len, char up, char left, register int argp);
e0dd62f6 RM	89
	90	/* VARARGS 2 */
	91	char *
971de7fb	92	tparam (char string, char outstring, int len, int arg0, int arg1, int arg2, int arg3)
e0dd62f6	93	{
e0dd62f6	94	int arg[4];
9e3295f9	95
e0dd62f6 RM	96	arg[0] = arg0;
	97	arg[1] = arg1;
	98	arg[2] = arg2;
	99	arg[3] = arg3;
	100	return tparam1 (string, outstring, len, NULL, NULL, arg);
e0dd62f6 RM	101	}
	102
	103	char *BC;
	104	char *UP;
	105
	106	static char tgoto_buf[50];
	107
	108	char *
971de7fb	109	tgoto (char *cm, int hpos, int vpos)
e0dd62f6 RM	110	{
	111	int args[2];
	112	if (!cm)
	113	return NULL;
	114	args[0] = vpos;
	115	args[1] = hpos;
	116	return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
	117	}
	118
	119	static char *
971de7fb	120	tparam1 (char string, char outstring, int len, char up, char left, register int *argp)
e0dd62f6 RM	121	{
	122	register int c;
	123	register char *p = string;
	124	register char *op = outstring;
	125	char *outend;
	126	int outlen = 0;
	127
	128	register int tem;
9ad4bf7a TTN	129	int old_argp = argp; / can move */
	130	int fixed_argp = argp; / never moves */
	131	int explicit_param_p = 0; /* set by %p */
e0dd62f6 RM	132	int doleft = 0;
	133	int doup = 0;
	134
	135	outend = outstring + len;
	136
	137	while (1)
	138	{
	139	/* If the buffer might be too short, make it bigger. */
	140	if (op + 5 >= outend)
	141	{
	142	register char *new;
b5e55477 GM	143	int offset = op - outstring;
b5e55477 GM	144
e0dd62f6 RM	145	if (outlen == 0)
	146	{
	147	outlen = len + 40;
	148	new = (char *) xmalloc (outlen);
72af86bd	149	memcpy (new, outstring, offset);
e0dd62f6 RM	150	}
	151	else
	152	{
e0dd62f6 RM	153	outlen *= 2;
	154	new = (char *) xrealloc (outstring, outlen);
	155	}
177c0ea7	156
b5e55477 GM	157	op = new + offset;
b5e55477 GM	158	outend = new + outlen;
e0dd62f6 RM	159	outstring = new;
	160	}
	161	c = *p++;
	162	if (!c)
	163	break;
	164	if (c == '%')
	165	{
	166	c = *p++;
9ad4bf7a TTN	167	if (explicit_param_p)
	168	explicit_param_p = 0;
	169	else
	170	tem = *argp;
e0dd62f6 RM	171	switch (c)
	172	{
	173	case 'd': /* %d means output in decimal. */
	174	if (tem < 10)
	175	goto onedigit;
	176	if (tem < 100)
	177	goto twodigit;
	178	case '3': /* %3 means output in decimal, 3 digits. */
	179	if (tem > 999)
	180	{
	181	*op++ = tem / 1000 + '0';
	182	tem %= 1000;
	183	}
	184	*op++ = tem / 100 + '0';
	185	case '2': /* %2 means output in decimal, 2 digits. */
	186	twodigit:
	187	tem %= 100;
	188	*op++ = tem / 10 + '0';
	189	onedigit:
	190	*op++ = tem % 10 + '0';
	191	argp++;
	192	break;
9ad4bf7a TTN	193	case 'p': /* %pN means use param N for next subst. */
	194	tem = fixed_argp[(*p++) - '1'];
	195	explicit_param_p = 1;
	196	break;
e0dd62f6 RM	197	case 'C':
	198	/* For c-100: print quotient of value by 96, if nonzero,
	199	then do like %+. */
	200	if (tem >= 96)
	201	{
	202	*op++ = tem / 96;
	203	tem %= 96;
	204	}
	205	case '+': /* %+x means add character code of char x. */
	206	tem += *p++;
	207	case '.': /* %. means output as character. */
	208	if (left)
	209	{
	210	/* If want to forbid output of 0 and \n and \t,
	211	and this is one of them, increment it. */
	212	while (tem == 0 \|\| tem == '\n' \|\| tem == '\t')
	213	{
	214	tem++;
	215	if (argp == old_argp)
	216	doup++, outend -= strlen (up);
	217	else
	218	doleft++, outend -= strlen (left);
	219	}
	220	}
	221	*op++ = tem ? tem : 0200;
	222	case 'f': /* %f means discard next arg. */
	223	argp++;
	224	break;
	225
	226	case 'b': /* %b means back up one arg (and re-use it). */
	227	argp--;
	228	break;
	229
	230	case 'r': /* %r means interchange following two args. */
	231	argp[0] = argp[1];
	232	argp[1] = tem;
	233	old_argp++;
	234	break;
	235
	236	case '>': /* %>xy means if arg is > char code of x, */
	237	if (argp[0] > p++) / then add char code of y to the arg, */
	238	argp[0] += p; / and in any case don't output. */
	239	p++; /* Leave the arg to be output later. */
	240	break;
	241
	242	case 'a': /* %a means arithmetic. */
	243	/* Next character says what operation.
	244	Add or subtract either a constant or some other arg. */
	245	/* First following character is + to add or - to subtract
	246	or = to assign. */
	247	/* Next following char is 'p' and an arg spec
	248	(0100 plus position of that arg relative to this one)
	249	or 'c' and a constant stored in a character. */
	250	tem = p[2] & 0177;
	251	if (p[1] == 'p')
	252	tem = argp[tem - 0100];
	253	if (p[0] == '-')
	254	argp[0] -= tem;
	255	else if (p[0] == '+')
	256	argp[0] += tem;
	257	else if (p[0] == '*')
	258	argp[0] *= tem;
	259	else if (p[0] == '/')
	260	argp[0] /= tem;
261	else
262	argp[0] = tem;
263
264	p += 3;
265	break;
266
267	case 'i': /* %i means add one to arg, */
268	argp[0] ++; /* and leave it to be output later. */
269	argp[1] ++; /* Increment the following arg, too! */
270	break;
271
272	case '%': /* %% means output %; no arg. */
273	goto ordinary;
274
275	case 'n': /* %n means xor each of next two args with 140. */
276	argp[0] ^= 0140;
277	argp[1] ^= 0140;
278	break;
279
280	case 'm': /* %m means xor each of next two args with 177. */
281	argp[0] ^= 0177;
282	argp[1] ^= 0177;
283	break;
284
285	case 'B': /* %B means express arg as BCD char code. */
286	argp[0] += 6 * (tem / 10);
287	break;
288
289	case 'D': /* %D means weird Delta Data transformation. */
290	argp[0] -= 2 * (tem % 16);
291	break;
45e0dd95 GM	292
	293	default:
	294	abort ();
e0dd62f6 RM	295	}
	296	}
	297	else
	298	/* Ordinary character in the argument string. */
	299	ordinary:
	300	*op++ = c;
	301	}
	302	*op = 0;
	303	while (doup-- > 0)
	304	strcat (op, up);
	305	while (doleft-- > 0)
	306	strcat (op, left);
	307	return outstring;
	308	}
	309	\f
	310	#ifdef DEBUG
	311
	312	main (argc, argv)
	313	int argc;
	314	char **argv;
	315	{
	316	char buf[50];
	317	int args[3];
	318	args[0] = atoi (argv[2]);
	319	args[1] = atoi (argv[3]);
	320	args[2] = atoi (argv[4]);
	321	tparam1 (argv[1], buf, "LEFT", "UP", args);
	322	printf ("%s\n", buf);
	323	return 0;
	324	}
	325
	326	#endif /* DEBUG */
ab5796a9 MB	327
	328	/* arch-tag: 83f7b5ac-a808-4f75-b87a-123de009b402
	329	(do not change this comment) */