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snprintf.c
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snprintf.c
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/*
* libslack - https://libslack.org
*
* Copyright (C) 1999-2004, 2010, 2020-2023 raf <raf@raf.org>
*
* 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 of the License, 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; if not, see <https://www.gnu.org/licenses/>.
*
* 20230824 raf <raf@raf.org>
*/
/*
* Copyright Patrick Powell 1995
* This code is based on code written by Patrick Powell (papowell@astart.com)
* It may be used for any purpose as long as this notice remains intact
* on all source code distributions
*/
/**************************************************************
* Original:
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
* A bombproof version of doprnt (dopr) included.
* Sigh. This sort of thing is always nasty do deal with. Note that
* the version here does not include floating point...
*
* snprintf() is used instead of sprintf() as it does limit checks
* for string length. This covers a nasty loophole.
*
* The other functions are there to prevent NULL pointers from
* causing nasty effects.
*
* More Recently:
* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
* This was ugly. It is still ugly. I opted out of floating point
* numbers, but the formatter understands just about everything
* from the normal C string format, at least as far as I can tell from
* the Solaris 2.5 printf(3S) man page.
*
* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
* Ok, added some minimal floating point support, which means this
* probably requires libm on most operating systems. Don't yet
* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
* was pretty badly broken, it just wasn't being exercised in ways
* which showed it, so that's been fixed. Also, formated the code
* to mutt conventions, and removed dead code left over from the
* original. Also, there is now a builtin-test, just compile with:
* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
* and run snprintf for results.
*
* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
* The PGP code was using unsigned hexadecimal formats.
* Unfortunately, unsigned formats simply didn't work.
*
* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
* The original code assumed that both snprintf() and vsnprintf() were
* missing. Some systems only have snprintf() but not vsnprintf(), so
* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
*
* Andrew Tridgell (tridge@samba.org) Oct 1998
* fixed handling of %.0f
* added test for HAVE_LONG_DOUBLE
*
* raf (raf@raf.org) Sep 2001
* improved speed of %[diouxXp]
* fixed handling of %#
* fixed handling of %[feEgG]
* fixed return value (required length, not truncated length)
* fixed error reporting (return -1 on format error)
* fixed snprintf(NULL, 0, "")
* fixed handling of %9.[diouxXp]
* fixed handling of %p
* fixed handling of flags [+- #0]
* fixed handling of precision (%[diouxXps])
* fixed handling of field width (%c)
* fixed handling of %h[diouxX] (bigendian)
* added ability to mimic glibc or solaris behaviour
* now ISO C 89 compliant formatting except format is not an mbstr
* added manpage in pod format (perldoc -F snprintf.c)
* added rigorous testing (145893 tests)
*
* raf (raf@raf.org) May 2002
* added solaris 8 bug compatibility
*
* raf (raf@raf.org) Dec 2003
* added examples to the manpage
*
* raf (raf@raf.org) Jun 2010
* fixed for 64-bit systems
*
**************************************************************/
/*
=head1 NAME
I<snprintf(3)> - safe sprintf
=head1 SYNOPSIS
#include <slack/std.h>
#ifndef HAVE_SNPRINTF
#include <slack/snprintf.h>
#endif
int snprintf(char *str, size_t size, const char *format, ...);
int vsnprintf(char *str, size_t size, const char *format, va_list args);
=head1 DESCRIPTION
Safe version of I<sprintf(3)> that doesn't suffer from buffer overruns.
=over 4
=cut
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <float.h>
#include <sys/types.h>
#include "snprintf.h"
#ifdef HAVE_LONG_DOUBLE
#define LDOUBLE long double
#else
#define LDOUBLE double
#endif
#ifndef TEST
#if defined __STDC__ || defined __cplusplus
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#if defined __STDC__ || defined __cplusplus
int sprintf(char *str, const char *format, ...);
#else
int sprintf();
#endif
/* Format read states */
#define PARSE_DEFAULT 0
#define PARSE_FLAGS 1
#define PARSE_WIDTH 2
#define PARSE_DOT 3
#define PARSE_PRECISION 4
#define PARSE_SIZE 5
#define PARSE_CONVERSION 6
#define PARSE_DONE 7
/* Format flags */
#define FLAG_MINUS (1 << 0)
#define FLAG_PLUS (1 << 1)
#define FLAG_SPACE (1 << 2)
#define FLAG_ALT (1 << 3)
#define FLAG_ZERO (1 << 4)
#define FLAG_UP (1 << 5)
#define FLAG_UNSIGNED (1 << 6)
#define FLAG_F (1 << 7)
#define FLAG_E (1 << 8)
#define FLAG_G (1 << 9)
#define FLAG_PTR_SIGNED (1 << 10)
#define FLAG_PTR_NIL (1 << 11)
#define FLAG_PTR_NOALT (1 << 12)
/* Conversion flags */
#define SIZE_SHORT 1
#define SIZE_LONG 2
#define SIZE_LDOUBLE 3
#ifndef max
#define max(a, b) ((a >= b) ? a : b)
#endif
/*
=item C<int snprintf(char *str, size_t size, const char *format, ...)>
Writes output to the buffer, C<str>, under control of the format string
C<format>, that specifies how subsequent arguments are converted for output.
It is similar to I<sprintf(3)>, except that C<size> specifies the maximum
number of bytes to produce. The trailing C<nul> byte is counted towards this
limit, so you must allocate at least C<size> bytes for C<str>.
If C<size> is zero, nothing is written, and C<str> may be C<null>.
Otherwise, output bytes beyond the C<n-1>st are discarded rather than being
written to C<str>, and a C<nul> byte is written at the end of the bytes
actually written to C<str>. If copying takes place between objects that
overlap, the behaviour is undefined.
On success, returns the number of bytes that would have been written had
C<size> been sufficiently large, not counting the terminating C<nul> byte.
Thus, the C<nul>-terminated output has been completely written if and only
if the return value is non-negative and less than C<size>. On error, returns
C<-1> (i.e. encoding error).
Note that if your system already has I<snprintf(3)>, but this implementation
was installed anyway, it's because the system implementation has a broken
return value. Some older implementations (e.g. I<glibc-2.0>) return C<-1>
when the string is truncated rather than returning the number of bytes that
would have been written had C<size> been sufficiently large (not counting
the terminating C<nul> byte) as required by I<ISO/IEC 9899:1999(E)>.
=cut
*/
#ifndef HAVE_SNPRINTF
#ifdef __STDC__
int snprintf(char *str, size_t size, const char *format, ...)
#else
int snprintf(str, size, format, va_alist)
char *str;
size_t size;
const char *format;
va_dcl
#endif
{
int ret;
va_list args;
#ifdef __STDC__
va_start(args, format);
#else
va_start(args);
#endif
ret = vsnprintf(str, size, format, args);
va_end(args);
return ret;
}
#endif
/*
=item C<int vsnprintf(char *str, size_t size, const char *format, va_list args)>
Equivalent to I<snprintf(3)> with the variable argument list specified
directly as for I<vsprintf(3)>.
=cut
*/
#ifndef HAVE_VSNPRINTF
static void outch(char *buffer, size_t *currlen, size_t *reqlen, size_t size, int c)
{
if (*currlen + 1 < size)
buffer[(*currlen)++] = (char)c;
++*reqlen;
}
static void fmtch(char *buffer, size_t *currlen, size_t *reqlen, size_t size, int value, int flags, int width)
{
int padlen;
/*
** A negative field width argument is taken as a - flag followed by a
** positive field width argument
*/
if (width < 0)
{
flags |= FLAG_MINUS;
width = -width;
}
padlen = width - 1;
if (padlen < 0)
padlen = 0;
if (flags & FLAG_MINUS)
padlen = -padlen;
while (padlen > 0)
{
outch(buffer, currlen, reqlen, size, ' ');
--padlen;
}
outch(buffer, currlen, reqlen, size, (unsigned int)value);
while (padlen < 0)
{
outch(buffer, currlen, reqlen, size, ' ');
++padlen;
}
}
static void fmtstr(char *buffer, size_t *currlen, size_t *reqlen, size_t size, char *value, int flags, int width, int precision)
{
int padlen, bytes;
int cnt = 0;
/*
** A negative field width argument is taken as a - flag followed by a
** positive field width argument
*/
if (width < 0)
{
flags |= FLAG_MINUS;
width = -width;
}
/* A negative precision argument is taken as if the precision were omitted */
if (precision < 0)
precision = -1;
#ifdef HAVE_PRINTF_STR_FMT_NULL
/* Print NULL as "(null)" if possible, otherwise as "" (like glibc) */
if (value == NULL)
value = (precision == -1 || precision >= 6) ? "(null)" : "";
#endif
for (bytes = 0; (precision == -1 || bytes < precision) && value[bytes]; ++bytes)
{}
padlen = width - bytes;
if (padlen < 0)
padlen = 0;
if (flags & FLAG_MINUS)
padlen = -padlen;
while (padlen > 0)
{
outch(buffer, currlen, reqlen, size, ' ');
--padlen;
}
while (*value && (precision == -1 || (cnt < precision)))
{
outch(buffer, currlen, reqlen, size, *value++);
++cnt;
}
while (padlen < 0)
{
outch(buffer, currlen, reqlen, size, ' ');
++padlen;
}
}
static void fmtint(char *buffer, size_t *currlen, size_t *reqlen, size_t size, long value, int base, int width, int precision, int flags)
{
int signvalue = 0;
unsigned long uvalue;
unsigned char convert[22];
int place = 0;
int spadlen = 0;
int zpadlen = 0;
char *digits;
int zextra = 0;
int sextra = 0;
/*
** A negative field width argument is taken as a - flag followed by a
** positive field width argument
*/
if (width < 0)
{
#ifdef HAVE_PRINTF_WITH_SOLARIS_NEGATIVE_WIDTH_BEHAVIOUR
if (!(flags & FLAG_ZERO) || precision >= 0)
#endif
flags |= FLAG_MINUS;
width = -width;
}
/* A negative precision argument is taken as if the precision were omitted */
if (precision < 0)
precision = -1;
/* If the space and + flags both appear, the space flag will be ignored */
if (flags & FLAG_PLUS)
flags &= ~FLAG_SPACE;
/* If the 0 and - flags both appear, the 0 flag will be ignored */
if (flags & FLAG_MINUS)
flags &= ~FLAG_ZERO;
/* If a precision is specified, the 0 flag will be ignored */
/* The d, i, o, u, x and X conversions have a default precision of 1 */
if (precision == -1)
precision = 1;
else
flags &= ~FLAG_ZERO;
/*
** The + flag: The result of the conversion will always begin with a plus
** or minus sign. (It will begin with a sign only when a negative value is
** converted if this flag is not specified.)
**
** The space flag: If the first character of a signed conversion is not a
** sign, or if a signed conversion results in no characters, a space will
** be prefixed to the result.
*/
uvalue = (unsigned long)value;
if (!(flags & FLAG_UNSIGNED))
{
if (value < 0)
{
signvalue = '-';
uvalue = (unsigned long)-value;
}
else if (flags & FLAG_PLUS)
signvalue = '+';
else if (flags & FLAG_SPACE)
signvalue = ' ';
}
#ifdef HAVE_PRINTF_PTR_FMT_SIGNED
/* Behave like glibc (treat %p as signed (almost)) */
if (flags & FLAG_PTR_SIGNED && value)
{
if (flags & FLAG_PLUS)
signvalue = '+';
else if (flags & FLAG_SPACE)
signvalue = ' ';
}
#endif
#ifdef HAVE_PRINTF_PTR_FMT_NOALT
/* Behave like Solaris - %p never produces 0x */
if (flags & FLAG_PTR_NOALT)
flags &= ~FLAG_ALT;
#endif
#ifdef HAVE_PRINTF_PTR_FMT_NIL
if (flags & FLAG_PTR_NIL && !value)
{
spadlen = width - 5;
if (spadlen < 0)
spadlen = 0;
if (flags & FLAG_MINUS)
spadlen = -spadlen;
while (spadlen > 0)
{
outch(buffer, currlen, reqlen, size, ' ');
--spadlen;
}
outch(buffer, currlen, reqlen, size, '(');
outch(buffer, currlen, reqlen, size, 'n');
outch(buffer, currlen, reqlen, size, 'i');
outch(buffer, currlen, reqlen, size, 'l');
outch(buffer, currlen, reqlen, size, ')');
while (spadlen < 0)
{
outch(buffer, currlen, reqlen, size, ' ');
++spadlen;
}
return;
}
#endif
/* %[XEG] produce uppercase alpha characters */
digits = (flags & FLAG_UP) ? "0123456789ABCDEF" : "0123456789abcdef";
/*
** The result of converting a zero value with a precision of zero is no
** characters
*/
if (precision || uvalue)
{
do
{
convert[place++] = digits[uvalue % base];
uvalue /= base;
}
while (uvalue && (place < 21));
}
convert[place] = 0;
/*
** The # flag: For o conversion, it increases the precision to force the
** first digit of the result to be a zero. For x (or X) conversion, a
** non-zero result will have 0x (or 0X) prefixed to it.
*/
if (flags & FLAG_ALT)
{
if (base == 16 && value)
sextra = 2;
#ifdef HAVE_PRINTF_WITH_SOLARIS8_ZERO_PRECISION_ALT_OCTAL_BEHAVIOUR
else if (base == 8 && precision <= place && (place != 0 && convert[place - 1] != '0'))
zextra = 1;
#else
else if (base == 8 && precision <= place && (place == 0 || convert[place - 1] != '0'))
zextra = 1;
#endif
}
/*
** The 0 flag: Leading zeroes (following any indication of sign or base)
** are used to pad to the field width; no space padding is performed.
*/
zpadlen = precision - place;
if (zpadlen < 0)
zpadlen = 0;
zpadlen += zextra;
spadlen = width - (place + zpadlen) - (signvalue ? 1 : 0) - sextra;
if (spadlen < 0)
spadlen = 0;
if (flags & FLAG_ZERO)
{
zpadlen = max(zpadlen, spadlen);
spadlen = 0;
}
if (flags & FLAG_MINUS)
spadlen = -spadlen;
while (spadlen > 0)
{
outch(buffer, currlen, reqlen, size, ' ');
--spadlen;
}
if (signvalue)
outch(buffer, currlen, reqlen, size, signvalue);
if (flags & FLAG_ALT && base == 16 && sextra == 2)
{
outch(buffer, currlen, reqlen, size, '0');
outch(buffer, currlen, reqlen, size, (flags & FLAG_UP) ? 'X' : 'x');
}
while (zpadlen > 0)
{
outch(buffer, currlen, reqlen, size, '0');
--zpadlen;
}
while (place > 0)
outch(buffer, currlen, reqlen, size, convert[--place]);
while (spadlen < 0)
{
outch(buffer, currlen, reqlen, size, ' ');
++spadlen;
}
}
#ifndef DBL_MAX_10_EXP
#define DBL_MAX_10_EXP 308
#endif
#ifndef LDBL_MAX_10_EXP
#define LDBL_MAX_10_EXP 4932
#endif
#define DBL_MAX_EXP_DIGITS 3
#define LDBL_MAX_EXP_DIGITS 4
#define MAX_DIGITS(ldbl) \
((ldbl) ? LDBL_MAX_10_EXP : DBL_MAX_10_EXP)
#define MAX_EXP_DIGITS(ldbl) \
((ldbl) ? LDBL_MAX_EXP_DIGITS : DBL_MAX_EXP_DIGITS)
#define F_MAX(width, precision, ldbl) \
max((width), 1 + MAX_DIGITS(ldbl) + 1 + (precision))
#define E_MAX(width, precision, ldbl) \
max((width), 3 + (precision) + 2 + MAX_EXP_DIGITS(ldbl))
#define G_MAX(width, precision, ldbl) \
max(F_MAX((width), precision, ldbl), E_MAX((width), precision, ldbl))
static void fmtfp(char *buffer, size_t *currlen, size_t *reqlen, size_t size, LDOUBLE fvalue, int width, int precision, int flags, int cflags)
{
/* Calculate maximum space required and delegate to sprintf() */
char buf[512], *convert = buf, *p;
char format[1 + 5 + 20 + 1 + 20 + 1 + 1 + 1];
char widstr[21];
int fpmax;
/*
** A negative field width argument is taken as a - flag followed by a
** positive field width argument
*/
if (width < 0)
{
#ifdef HAVE_PRINTF_WITH_SOLARIS_NEGATIVE_WIDTH_BEHAVIOUR
if ((flags & FLAG_ZERO) == 0)
#endif
flags |= FLAG_MINUS;
width = -width;
}
/* A negative precision argument is taken as if the precision were omitted */
if (precision < 0)
precision = -1;
/*
** The ISO C standard (Section 7.9.6.2, The fscanf function), says that
** if the precision is missing, the default precision for f, e and E is
** taken to be 6. The default precision for g and G is taken to be 1.
** However, many systems use 6, so we'll provide an option.
*/
if (precision == -1)
precision =
#ifdef HAVE_PRINTF_FLT_FMT_G_STD
(flags & FLAG_G) ? 1 :
#endif
6;
/* Calculate maximum possible length */
if (flags & FLAG_F)
fpmax = F_MAX(width, precision, (cflags & SIZE_LDOUBLE)) + 1;
else if (flags & FLAG_E)
fpmax = E_MAX(width, precision, (cflags & SIZE_LDOUBLE)) + 1;
else
fpmax = G_MAX(width, precision, (cflags & SIZE_LDOUBLE)) + 1;
/* Ensure enough space or bail out */
if (fpmax > 512 && !(convert = malloc(fpmax)))
return;
/* Build the format string (probably should have just copied it) */
sprintf(widstr, "%d", width);
sprintf(format, "%%%s%s%s%s%s%s.%d%s%s",
(flags & FLAG_MINUS) ? "-" : "",
(flags & FLAG_PLUS) ? "+" : "",
(flags & FLAG_SPACE) ? " " : "",
(flags & FLAG_ALT) ? "#" : "",
(flags & FLAG_ZERO) ? "0" : "",
(width) ? widstr : "",
precision,
(cflags & SIZE_LDOUBLE) ? "L" : "",
(flags & FLAG_E) ? (flags & FLAG_UP) ? "E" : "e" :
(flags & FLAG_G) ? (flags & FLAG_UP) ? "G" : "g" : "f"
);
/* Delegate to sprintf() */
if (cflags & SIZE_LDOUBLE)
sprintf(convert, format, fvalue);
else
sprintf(convert, format, (double)fvalue);
/* Copy to buffer */
for (p = convert; *p; ++p)
outch(buffer, currlen, reqlen, size, *p);
/* Deallocate if necessary */
if (convert != buf)
free(convert);
}
int vsnprintf(char *str, size_t size, const char *format, va_list args)
{
char ch;
long value;
LDOUBLE fvalue;
char *strvalue;
int width;
int precision;
int state;
int flags;
int cflags;
size_t currlen;
size_t reqlen;
state = PARSE_DEFAULT;
currlen = reqlen = flags = cflags = width = 0;
precision = -1;
ch = *format++;
while (state != PARSE_DONE)
{
if (ch == '\0')
{
if (state == PARSE_DEFAULT)
state = PARSE_DONE;
else
return -1;
}
switch (state)
{
case PARSE_DEFAULT:
if (ch == '%')
state = PARSE_FLAGS;
else
outch(str, &currlen, &reqlen, size, ch);
ch = *format++;
break;
case PARSE_FLAGS:
switch (ch)
{
case '-':
flags |= FLAG_MINUS;
ch = *format++;
break;
case '+':
flags |= FLAG_PLUS;
ch = *format++;
break;
case ' ':
flags |= FLAG_SPACE;
ch = *format++;
break;
case '#':
flags |= FLAG_ALT;
ch = *format++;
break;
case '0':
flags |= FLAG_ZERO;
ch = *format++;
break;
default:
state = PARSE_WIDTH;
break;
}
break;
case PARSE_WIDTH:
if (isdigit((int)(unsigned char)ch))
{
width = 10 * width + ch - '0';
ch = *format++;
}
else if (ch == '*')
{
width = va_arg(args, int);
ch = *format++;
state = PARSE_DOT;
}
else
state = PARSE_DOT;
break;
case PARSE_DOT:
if (ch == '.')
{
precision = 0;
state = PARSE_PRECISION;
ch = *format++;
}
else
state = PARSE_SIZE;
break;
case PARSE_PRECISION:
if (isdigit((int)(unsigned char)ch))
{
precision = 10 * precision + ch - '0';
ch = *format++;
}
else if (ch == '*')
{
precision = va_arg(args, int);
ch = *format++;
state = PARSE_SIZE;
}
else
state = PARSE_SIZE;
break;
case PARSE_SIZE:
switch (ch)
{
case 'h':
cflags = SIZE_SHORT;
ch = *format++;
break;
case 'l':
cflags = SIZE_LONG;
ch = *format++;
break;
case 'L':
cflags = SIZE_LDOUBLE;
ch = *format++;
break;
}
state = PARSE_CONVERSION;
break;
case PARSE_CONVERSION:
switch (ch)
{
case 'd':
case 'i':
if (cflags == SIZE_SHORT)
value = (short)va_arg(args, int);
else if (cflags == SIZE_LONG)
value = (long)va_arg(args, long);
else
value = (int)va_arg(args, int);
fmtint(str, &currlen, &reqlen, size, value, 10, width, precision, flags);
break;
case 'o':
flags |= FLAG_UNSIGNED;
if (cflags == SIZE_SHORT)
value = (unsigned short)va_arg(args, int);
else if (cflags == SIZE_LONG)
value = (unsigned long)va_arg(args, long);
else
value = (unsigned int)va_arg(args, int);
fmtint(str, &currlen, &reqlen, size, value, 8, width, precision, flags);
break;
case 'u':
flags |= FLAG_UNSIGNED;
if (cflags == SIZE_SHORT)
value = (unsigned short)va_arg(args, int);
else if (cflags == SIZE_LONG)
value = (unsigned long)va_arg(args, long);
else
value = (unsigned int)va_arg(args, int);
fmtint(str, &currlen, &reqlen, size, value, 10, width, precision, flags);
break;
case 'X':
flags |= FLAG_UP;
case 'x':
flags |= FLAG_UNSIGNED;
if (cflags == SIZE_SHORT)
value = (unsigned short)va_arg(args, int);
else if (cflags == SIZE_LONG)
value = (unsigned long)va_arg(args, long);
else
value = (unsigned int)va_arg(args, int);
fmtint(str, &currlen, &reqlen, size, value, 16, width, precision, flags);
break;
case 'f':
flags |= FLAG_F;
if (cflags == SIZE_LDOUBLE)
fvalue = va_arg(args, LDOUBLE);
else
fvalue = (LDOUBLE)va_arg(args, double);
fmtfp(str, &currlen, &reqlen, size, fvalue, width, precision, flags, cflags);
break;
case 'E':
flags |= FLAG_UP;
case 'e':
flags |= FLAG_E;
if (cflags == SIZE_LDOUBLE)
fvalue = va_arg(args, LDOUBLE);
else
fvalue = (LDOUBLE)va_arg(args, double);
fmtfp(str, &currlen, &reqlen, size, fvalue, width, precision, flags, cflags);
break;
case 'G':
flags |= FLAG_UP;
case 'g':
flags |= FLAG_G;
if (cflags == SIZE_LDOUBLE)
fvalue = va_arg(args, LDOUBLE);
else
fvalue = (LDOUBLE)va_arg(args, double);
fmtfp(str, &currlen, &reqlen, size, fvalue, width, precision, flags, cflags);
break;
case 'c':
fmtch(str, &currlen, &reqlen, size, va_arg(args, int), flags, width);
break;
case 's':
strvalue = va_arg(args, char *);
fmtstr(str, &currlen, &reqlen, size, strvalue, flags, width, precision);
break;
case 'p':
flags |= FLAG_UNSIGNED;
#ifdef HAVE_PRINTF_PTR_FMT_ALTERNATE
flags |= FLAG_ALT;
#endif
#ifdef HAVE_PRINTF_PTR_FMT_SIGNED
flags |= FLAG_PTR_SIGNED;
#endif
#ifdef HAVE_PRINTF_PTR_FMT_NIL
flags |= FLAG_PTR_NIL;
#endif
#ifdef HAVE_PRINTF_PTR_FMT_NOALT
flags |= FLAG_PTR_NOALT;
#endif
cflags = SIZE_LONG;
strvalue = va_arg(args, void *);
fmtint(str, &currlen, &reqlen, size, (long)strvalue, 16, width, precision, flags);
break;
case 'n':
if (cflags == SIZE_SHORT)
{
short *num = va_arg(args, short *);
*num = (short)currlen;
}
else if (cflags == SIZE_LONG)
{
long *num = va_arg(args, long *);
*num = (long)currlen;
}
else
{
int *num = va_arg(args, int *);
*num = currlen;
}
break;
case '%':
if (flags != 0 || cflags != 0 || width != 0 || precision != 0)
return -1;
outch(str, &currlen, &reqlen, size, ch);
break;
default:
return -1;
}
ch = *format++;
state = PARSE_DEFAULT;
flags = cflags = width = 0;
precision = -1;
break;
case PARSE_DONE:
break;
}
}
if (size)
str[currlen] = '\0';
return reqlen;
}
#endif
/*
=back
=head1 MT-Level