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

/* Output like sprintf to a buffer of specified size.
   Also takes args differently: pass one pointer to the end
   of the format string in addition to the format string itself.
   Copyright (C) 1985, 2001-2011  Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs 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.

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

/* If you think about replacing this with some similar standard C function of
   the printf family (such as vsnprintf), please note that this function
   supports the following Emacs-specific features:

   . For %c conversions, it produces a string with the multibyte representation
     of the (`int') argument, suitable for display in an Emacs buffer.

   . For %s and %c, when field width is specified (e.g., %25s), it accounts for
     the diplay width of each character, according to char-width-table.  That
     is, it does not assume that each character takes one column on display.

   . If the size of the buffer is not enough to produce the formatted string in
     its entirety, it makes sure that truncation does not chop the last
     character in the middle of its multibyte sequence, producing an invalid
     sequence.

   . It accepts a pointer to the end of the format string, so the format string
     could include embedded null characters.

   . It signals an error if the length of the formatted string is about to
     overflow MOST_POSITIVE_FIXNUM, to avoid producing strings longer than what
     Emacs can handle.

   OTOH, this function supports only a small subset of the standard C formatted
   output facilities.  E.g., %u and %ll are not supported, and precision is
   largely ignored except for converting floating-point values.  However, this
   is okay, as this function is supposed to be called from `error' and similar
   functions, and thus does not need to support features beyond those in
   `Fformat', which is used by `error' on the Lisp level.  */

#include <config.h>
#include <stdio.h>
#include <ctype.h>
#include <setjmp.h>

#ifdef STDC_HEADERS
#include <float.h>
#endif

#include <unistd.h>

#include <limits.h>
#ifndef SIZE_MAX
# define SIZE_MAX ((size_t) -1)
#endif

#include "lisp.h"

/* Since we use the macro CHAR_HEAD_P, we have to include this, but
   don't have to include others because CHAR_HEAD_P does not contains
   another macro.  */
#include "character.h"

#ifndef DBL_MAX_10_EXP
#define DBL_MAX_10_EXP 308 /* IEEE double */
#endif

/* Generate output from a format-spec FORMAT,
   terminated at position FORMAT_END.
   Output goes in BUFFER, which has room for BUFSIZE chars.
   If the output does not fit, truncate it to fit.
   Returns the number of bytes stored into BUFFER.
   ARGS points to the vector of arguments, and NARGS says how many.
   A double counts as two arguments.
   String arguments are passed as C strings.
   Integers are passed as C integers.  */

size_t
doprnt (char *buffer, register size_t bufsize, const char *format,
	const char *format_end, va_list ap)
{
  const char *fmt = format;	/* Pointer into format string */
  register char *bufptr = buffer; /* Pointer into output buffer.. */

  /* Use this for sprintf unless we need something really big.  */
  char tembuf[DBL_MAX_10_EXP + 100];

  /* Size of sprintf_buffer.  */
  size_t size_allocated = sizeof (tembuf);

  /* Buffer to use for sprintf.  Either tembuf or same as BIG_BUFFER.  */
  char *sprintf_buffer = tembuf;

  /* Buffer we have got with malloc.  */
  char *big_buffer = NULL;

  register size_t tem;
  char *string;
  char fixed_buffer[20];	/* Default buffer for small formatting. */
  char *fmtcpy;
  int minlen;
  char charbuf[MAX_MULTIBYTE_LENGTH + 1];	/* Used for %c.  */

  if (format_end == 0)
    format_end = format + strlen (format);

  if ((format_end - format + 1) < sizeof (fixed_buffer))
    fmtcpy = fixed_buffer;
  else
    fmtcpy = (char *) alloca (format_end - format + 1);

  bufsize--;

  /* Loop until end of format string or buffer full. */
  while (fmt != format_end && bufsize > 0)
    {
      if (*fmt == '%')	/* Check for a '%' character */
	{
	  size_t size_bound = 0;
	  EMACS_INT width;  /* Columns occupied by STRING on display.  */
	  int long_flag = 0;

	  fmt++;
	  /* Copy this one %-spec into fmtcpy.  */
	  string = fmtcpy;
	  *string++ = '%';
	  while (1)
	    {
	      *string++ = *fmt;
	      if ('0' <= *fmt && *fmt <= '9')
		{
		  /* Get an idea of how much space we might need.
		     This might be a field width or a precision; e.g.
		     %1.1000f and %1000.1f both might need 1000+ bytes.
		     Parse the width or precision, checking for overflow.  */
		  size_t n = *fmt - '0';
		  while ('0' <= fmt[1] && fmt[1] <= '9')
		    {
		      if (n >= SIZE_MAX / 10
			  || n * 10 > SIZE_MAX - (fmt[1] - '0'))
			error ("Format width or precision too large");
		      n = n * 10 + fmt[1] - '0';
		      *string++ = *++fmt;
		    }

		  if (size_bound < n)
		    size_bound = n;
		}
	      else if (*fmt == '-' || *fmt == ' ' || *fmt == '.' || *fmt == '+')
		;
	      else if (*fmt == 'l')
		{
		  long_flag = 1;
		  if (!strchr ("dox", fmt[1]))
		    /* %l as conversion specifier, not as modifier.  */
		    break;
		}
	      else
		break;
	      fmt++;
	    }
	  *string = 0;

	  /* Make the size bound large enough to handle floating point formats
	     with large numbers.  */
	  if (size_bound > SIZE_MAX - DBL_MAX_10_EXP - 50)
	    error ("Format width or precision too large");
	  size_bound += DBL_MAX_10_EXP + 50;

	  /* Make sure we have that much.  */
	  if (size_bound > size_allocated)
	    {
	      if (big_buffer)
		big_buffer = (char *) xrealloc (big_buffer, size_bound);
	      else
		big_buffer = (char *) xmalloc (size_bound);
	      sprintf_buffer = big_buffer;
	      size_allocated = size_bound;
	    }
	  minlen = 0;
	  switch (*fmt++)
	    {
	    default:
	      error ("Invalid format operation %%%c", fmt[-1]);

/*	    case 'b': */
	    case 'l':
	    case 'd':
	      {
		int i;
		long l;

		if (long_flag)
		  {
		    l = va_arg(ap, long);
		    sprintf (sprintf_buffer, fmtcpy, l);
		  }
		else
		  {
		    i = va_arg(ap, int);
		    sprintf (sprintf_buffer, fmtcpy, i);
		  }
		/* Now copy into final output, truncating as necessary.  */
		string = sprintf_buffer;
		goto doit;
	      }

	    case 'o':
	    case 'x':
	      {
		unsigned u;
		unsigned long ul;

		if (long_flag)
		  {
		    ul = va_arg(ap, unsigned long);
		    sprintf (sprintf_buffer, fmtcpy, ul);
		  }
		else
		  {
		    u = va_arg(ap, unsigned);
		    sprintf (sprintf_buffer, fmtcpy, u);
		  }
		/* Now copy into final output, truncating as necessary.  */
		string = sprintf_buffer;
		goto doit;
	      }

	    case 'f':
	    case 'e':
	    case 'g':
	      {
		double d = va_arg(ap, double);
		sprintf (sprintf_buffer, fmtcpy, d);
		/* Now copy into final output, truncating as necessary.  */
		string = sprintf_buffer;
		goto doit;
	      }

	    case 'S':
	      string[-1] = 's';
	    case 's':
	      if (fmtcpy[1] != 's')
		minlen = atoi (&fmtcpy[1]);
	      string = va_arg (ap, char *);
	      tem = strlen (string);
	      if (tem > MOST_POSITIVE_FIXNUM)
		error ("String for %%s or %%S format is too long");
	      width = strwidth (string, tem);
	      goto doit1;

	      /* Copy string into final output, truncating if no room.  */
	    doit:
	      /* Coming here means STRING contains ASCII only.  */
	      tem = strlen (string);
	      if (tem > MOST_POSITIVE_FIXNUM)
		error ("Format width or precision too large");
	      width = tem;
	    doit1:
	      /* We have already calculated:
		 TEM -- length of STRING,
		 WIDTH -- columns occupied by STRING when displayed, and
		 MINLEN -- minimum columns of the output.  */
	      if (minlen > 0)
		{
		  while (minlen > width && bufsize > 0)
		    {
		      *bufptr++ = ' ';
		      bufsize--;
		      minlen--;
		    }
		  minlen = 0;
		}
	      if (tem > bufsize)
		{
		  /* Truncate the string at character boundary.  */
		  tem = bufsize;
		  while (!CHAR_HEAD_P (string[tem - 1])) tem--;
		  memcpy (bufptr, string, tem);
		  /* We must calculate WIDTH again.  */
		  width = strwidth (bufptr, tem);
		}
	      else
		memcpy (bufptr, string, tem);
	      bufptr += tem;
	      bufsize -= tem;
	      if (minlen < 0)
		{
		  while (minlen < - width && bufsize > 0)
		    {
		      *bufptr++ = ' ';
		      bufsize--;
		      minlen++;
		    }
		  minlen = 0;
		}
	      continue;

	    case 'c':
	      {
		int chr = va_arg(ap, int);
		tem = CHAR_STRING (chr, (unsigned char *) charbuf);
		string = charbuf;
		string[tem] = 0;
		width = strwidth (string, tem);
		if (fmtcpy[1] != 'c')
		  minlen = atoi (&fmtcpy[1]);
		goto doit1;
	      }

	    case '%':
	      fmt--;    /* Drop thru and this % will be treated as normal */
	    }
	}

      {
	/* Just some character; Copy it if the whole multi-byte form
	   fit in the buffer.  */
	char *save_bufptr = bufptr;

	do { *bufptr++ = *fmt++; }
	while (--bufsize > 0 && !CHAR_HEAD_P (*fmt));
	if (!CHAR_HEAD_P (*fmt))
	  {
	    bufptr = save_bufptr;
	    break;
	  }
      }
    };

  /* If we had to malloc something, free it.  */
  xfree (big_buffer);

  *bufptr = 0;		/* Make sure our string ends with a '\0' */
  return bufptr - buffer;
}
Commit	Line	Data
24f98398	1	/* Output like sprintf to a buffer of specified size.
762b15be EZ	2	Also takes args differently: pass one pointer to the end
762b15be EZ	3	of the format string in addition to the format string itself.
73b0cd50	4	Copyright (C) 1985, 2001-2011 Free Software Foundation, Inc.
24f98398 JA	5
	6	This file is part of GNU Emacs.
	7
9ec0b715	8	GNU Emacs is free software: you can redistribute it and/or modify
24f98398	9	it under the terms of the GNU General Public License as published by
9ec0b715 GM	10	the Free Software Foundation, either version 3 of the License, or
9ec0b715 GM	11	(at your option) any later version.
24f98398 JA	12
	13	GNU Emacs is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
9ec0b715	19	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24f98398	20
762b15be EZ	21	/* If you think about replacing this with some similar standard C function of
	22	the printf family (such as vsnprintf), please note that this function
	23	supports the following Emacs-specific features:
	24
	25	. For %c conversions, it produces a string with the multibyte representation
	26	of the (`int') argument, suitable for display in an Emacs buffer.
	27
	28	. For %s and %c, when field width is specified (e.g., %25s), it accounts for
	29	the diplay width of each character, according to char-width-table. That
	30	is, it does not assume that each character takes one column on display.
	31
	32	. If the size of the buffer is not enough to produce the formatted string in
	33	its entirety, it makes sure that truncation does not chop the last
	34	character in the middle of its multibyte sequence, producing an invalid
	35	sequence.
	36
	37	. It accepts a pointer to the end of the format string, so the format string
	38	could include embedded null characters.
	39
	40	. It signals an error if the length of the formatted string is about to
	41	overflow MOST_POSITIVE_FIXNUM, to avoid producing strings longer than what
	42	Emacs can handle.
	43
	44	OTOH, this function supports only a small subset of the standard C formatted
	45	output facilities. E.g., %u and %ll are not supported, and precision is
	46	largely ignored except for converting floating-point values. However, this
	47	is okay, as this function is supposed to be called from `error' and similar
	48	functions, and thus does not need to support features beyond those in
	49	`Fformat', which is used by `error' on the Lisp level. */
24f98398	50
6d291527	51	#include <config.h>
24f98398 JA	52	#include <stdio.h>
24f98398 JA	53	#include <ctype.h>
d7306fe6	54	#include <setjmp.h>
24f98398	55
cf09633a	56	#ifdef STDC_HEADERS
be65c2f4 PE	57	#include <float.h>
	58	#endif
	59
48236137	60	#include <unistd.h>
48236137	61
e6c3da20 EZ	62	#include <limits.h>
	63	#ifndef SIZE_MAX
	64	# define SIZE_MAX ((size_t) -1)
	65	#endif
	66
523e9291 RS	67	#include "lisp.h"
523e9291 RS	68
a0ca925c KH	69	/* Since we use the macro CHAR_HEAD_P, we have to include this, but
	70	don't have to include others because CHAR_HEAD_P does not contains
	71	another macro. */
83be827a	72	#include "character.h"
a0ca925c	73
92bc9a36 DN	74	#ifndef DBL_MAX_10_EXP
	75	#define DBL_MAX_10_EXP 308 /* IEEE double */
	76	#endif
	77
f4c730d3 RS	78	/* Generate output from a format-spec FORMAT,
	79	terminated at position FORMAT_END.
	80	Output goes in BUFFER, which has room for BUFSIZE chars.
	81	If the output does not fit, truncate it to fit.
6afc669e	82	Returns the number of bytes stored into BUFFER.
f4c730d3	83	ARGS points to the vector of arguments, and NARGS says how many.
1513af9e RS	84	A double counts as two arguments.
	85	String arguments are passed as C strings.
	86	Integers are passed as C integers. */
f4c730d3	87
e6c3da20 EZ	88	size_t
e6c3da20 EZ	89	doprnt (char buffer, register size_t bufsize, const char format,
a8fe7202	90	const char *format_end, va_list ap)
24f98398	91	{
a8fe7202	92	const char fmt = format; / Pointer into format string */
24f98398	93	register char bufptr = buffer; / Pointer into output buffer.. */
03383aaf	94
f4c730d3	95	/* Use this for sprintf unless we need something really big. */
be65c2f4	96	char tembuf[DBL_MAX_10_EXP + 100];
03383aaf	97
f4c730d3	98	/* Size of sprintf_buffer. */
e6c3da20	99	size_t size_allocated = sizeof (tembuf);
03383aaf	100
f4c730d3 RS	101	/* Buffer to use for sprintf. Either tembuf or same as BIG_BUFFER. */
f4c730d3 RS	102	char *sprintf_buffer = tembuf;
03383aaf	103
f4c730d3	104	/* Buffer we have got with malloc. */
e6c3da20	105	char *big_buffer = NULL;
03383aaf	106
e6c3da20	107	register size_t tem;
7469ef5d	108	char *string;
03383aaf BF	109	char fixed_buffer[20]; /* Default buffer for small formatting. */
03383aaf BF	110	char *fmtcpy;
24f98398	111	int minlen;
7469ef5d	112	char charbuf[MAX_MULTIBYTE_LENGTH + 1]; /* Used for %c. */
24f98398 JA	113
	114	if (format_end == 0)
	115	format_end = format + strlen (format);
	116
03383aaf BF	117	if ((format_end - format + 1) < sizeof (fixed_buffer))
	118	fmtcpy = fixed_buffer;
	119	else
91098d38	120	fmtcpy = (char *) alloca (format_end - format + 1);
03383aaf	121
24f98398	122	bufsize--;
03383aaf BF	123
	124	/* Loop until end of format string or buffer full. */
	125	while (fmt != format_end && bufsize > 0)
24f98398 JA	126	{
	127	if (fmt == '%') / Check for a '%' character */
	128	{
e6c3da20 EZ	129	size_t size_bound = 0;
	130	EMACS_INT width; /* Columns occupied by STRING on display. */
	131	int long_flag = 0;
f4c730d3	132
24f98398	133	fmt++;
d427b66a	134	/* Copy this one %-spec into fmtcpy. */
7469ef5d	135	string = fmtcpy;
24f98398	136	*string++ = '%';
03383aaf	137	while (1)
24f98398 JA	138	{
24f98398 JA	139	string++ = fmt;
be65c2f4 PE	140	if ('0' <= fmt && fmt <= '9')
	141	{
	142	/* Get an idea of how much space we might need.
	143	This might be a field width or a precision; e.g.
	144	%1.1000f and %1000.1f both might need 1000+ bytes.
	145	Parse the width or precision, checking for overflow. */
e6c3da20	146	size_t n = *fmt - '0';
be65c2f4 PE	147	while ('0' <= fmt[1] && fmt[1] <= '9')
be65c2f4 PE	148	{
e6c3da20 EZ	149	if (n >= SIZE_MAX / 10
e6c3da20 EZ	150	\|\| n * 10 > SIZE_MAX - (fmt[1] - '0'))
be65c2f4	151	error ("Format width or precision too large");
26898943	152	n = n * 10 + fmt[1] - '0';
be65c2f4 PE	153	string++ = ++fmt;
	154	}
	155
	156	if (size_bound < n)
	157	size_bound = n;
	158	}
01769a73	159	else if (fmt == '-' \|\| fmt == ' ' \|\| fmt == '.' \|\| fmt == '+')
be65c2f4	160	;
e6c3da20 EZ	161	else if (*fmt == 'l')
	162	{
	163	long_flag = 1;
	164	if (!strchr ("dox", fmt[1]))
	165	/* %l as conversion specifier, not as modifier. */
	166	break;
	167	}
be65c2f4	168	else
24f98398 JA	169	break;
	170	fmt++;
	171	}
	172	*string = 0;
03383aaf	173
be65c2f4 PE	174	/* Make the size bound large enough to handle floating point formats
be65c2f4 PE	175	with large numbers. */
e6c3da20	176	if (size_bound > SIZE_MAX - DBL_MAX_10_EXP - 50)
be65c2f4	177	error ("Format width or precision too large");
01769a73	178	size_bound += DBL_MAX_10_EXP + 50;
6e951728	179
f4c730d3 RS	180	/* Make sure we have that much. */
	181	if (size_bound > size_allocated)
	182	{
	183	if (big_buffer)
	184	big_buffer = (char *) xrealloc (big_buffer, size_bound);
	185	else
	186	big_buffer = (char *) xmalloc (size_bound);
	187	sprintf_buffer = big_buffer;
	188	size_allocated = size_bound;
	189	}
24f98398 JA	190	minlen = 0;
	191	switch (*fmt++)
	192	{
	193	default:
	194	error ("Invalid format operation %%%c", fmt[-1]);
	195
	196	/* case 'b': */
e6c3da20	197	case 'l':
24f98398	198	case 'd':
e6c3da20 EZ	199	{
	200	int i;
	201	long l;
	202
	203	if (long_flag)
	204	{
	205	l = va_arg(ap, long);
	206	sprintf (sprintf_buffer, fmtcpy, l);
	207	}
	208	else
	209	{
	210	i = va_arg(ap, int);
	211	sprintf (sprintf_buffer, fmtcpy, i);
	212	}
	213	/* Now copy into final output, truncating as necessary. */
	214	string = sprintf_buffer;
	215	goto doit;
	216	}
	217
24f98398 JA	218	case 'o':
24f98398 JA	219	case 'x':
e6c3da20 EZ	220	{
	221	unsigned u;
	222	unsigned long ul;
	223
	224	if (long_flag)
	225	{
	226	ul = va_arg(ap, unsigned long);
	227	sprintf (sprintf_buffer, fmtcpy, ul);
	228	}
	229	else
	230	{
	231	u = va_arg(ap, unsigned);
	232	sprintf (sprintf_buffer, fmtcpy, u);
	233	}
	234	/* Now copy into final output, truncating as necessary. */
	235	string = sprintf_buffer;
	236	goto doit;
	237	}
24f98398	238
f4c730d3 RS	239	case 'f':
	240	case 'e':
	241	case 'g':
	242	{
6a8033e1 KR	243	double d = va_arg(ap, double);
6a8033e1 KR	244	sprintf (sprintf_buffer, fmtcpy, d);
e6c3da20	245	/* Now copy into final output, truncating as necessary. */
7469ef5d	246	string = sprintf_buffer;
f4c730d3 RS	247	goto doit;
	248	}
	249
24f98398 JA	250	case 'S':
	251	string[-1] = 's';
	252	case 's':
24f98398 JA	253	if (fmtcpy[1] != 's')
24f98398 JA	254	minlen = atoi (&fmtcpy[1]);
7469ef5d	255	string = va_arg (ap, char *);
e267324c	256	tem = strlen (string);
e6c3da20 EZ	257	if (tem > MOST_POSITIVE_FIXNUM)
e6c3da20 EZ	258	error ("String for %%s or %%S format is too long");
a0ca925c	259	width = strwidth (string, tem);
1513af9e RS	260	goto doit1;
1513af9e RS	261
24f98398 JA	262	/* Copy string into final output, truncating if no room. */
24f98398 JA	263	doit:
a0ca925c	264	/* Coming here means STRING contains ASCII only. */
e6c3da20 EZ	265	tem = strlen (string);
	266	if (tem > MOST_POSITIVE_FIXNUM)
	267	error ("Format width or precision too large");
	268	width = tem;
35a65fce	269	doit1:
a0ca925c KH	270	/* We have already calculated:
	271	TEM -- length of STRING,
	272	WIDTH -- columns occupied by STRING when displayed, and
	273	MINLEN -- minimum columns of the output. */
24f98398 JA	274	if (minlen > 0)
24f98398 JA	275	{
a0ca925c	276	while (minlen > width && bufsize > 0)
24f98398 JA	277	{
	278	*bufptr++ = ' ';
	279	bufsize--;
	280	minlen--;
	281	}
	282	minlen = 0;
	283	}
	284	if (tem > bufsize)
a0ca925c KH	285	{
	286	/* Truncate the string at character boundary. */
	287	tem = bufsize;
a50545d9	288	while (!CHAR_HEAD_P (string[tem - 1])) tem--;
72af86bd	289	memcpy (bufptr, string, tem);
a0ca925c KH	290	/* We must calculate WIDTH again. */
	291	width = strwidth (bufptr, tem);
	292	}
	293	else
72af86bd	294	memcpy (bufptr, string, tem);
24f98398 JA	295	bufptr += tem;
	296	bufsize -= tem;
	297	if (minlen < 0)
	298	{
a0ca925c	299	while (minlen < - width && bufsize > 0)
24f98398 JA	300	{
	301	*bufptr++ = ' ';
	302	bufsize--;
	303	minlen++;
	304	}
	305	minlen = 0;
	306	}
	307	continue;
	308
	309	case 'c':
6a8033e1	310	{
e6c3da20 EZ	311	int chr = va_arg(ap, int);
e6c3da20 EZ	312	tem = CHAR_STRING (chr, (unsigned char *) charbuf);
6a8033e1 KR	313	string = charbuf;
	314	string[tem] = 0;
	315	width = strwidth (string, tem);
	316	if (fmtcpy[1] != 'c')
	317	minlen = atoi (&fmtcpy[1]);
	318	goto doit1;
	319	}
24f98398 JA	320
	321	case '%':
	322	fmt--; /* Drop thru and this % will be treated as normal */
	323	}
	324	}
a0ca925c KH	325
	326	{
	327	/* Just some character; Copy it if the whole multi-byte form
	328	fit in the buffer. */
	329	char *save_bufptr = bufptr;
	330
	331	do { bufptr++ = fmt++; }
a50545d9 RS	332	while (--bufsize > 0 && !CHAR_HEAD_P (*fmt));
a50545d9 RS	333	if (!CHAR_HEAD_P (*fmt))
a0ca925c KH	334	{
	335	bufptr = save_bufptr;
	336	break;
	337	}
	338	}
24f98398 JA	339	};
24f98398 JA	340
f4c730d3	341	/* If we had to malloc something, free it. */
70fdbb46	342	xfree (big_buffer);
f4c730d3	343
e6c3da20	344	bufptr = 0; / Make sure our string ends with a '\0' */
24f98398 JA	345	return bufptr - buffer;
24f98398 JA	346	}