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conky/libgnu/vasnprintf.c
Philip Kovacs 5ce58e014e Add libgnu convenience lib, modules stdio and getaddrinfo. 
We now make no assumption about availability of functions
such as snprintf and getnameinfo.  If the target machine 
doesnt have them, libgnu provides them.



git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky1@1203 7f574dfc-610e-0410-a909-a81674777703
2008-07-01 01:26:02 +00:00

3967 lines
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/* vsprintf with automatic memory allocation.
Copyright (C) 1999, 2002-2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* This file can be parametrized with the following macros:
VASNPRINTF The name of the function being defined.
FCHAR_T The element type of the format string.
DCHAR_T The element type of the destination (result) string.
FCHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters
in the format string are ASCII. MUST be set if
FCHAR_T and DCHAR_T are not the same type.
DIRECTIVE Structure denoting a format directive.
Depends on FCHAR_T.
DIRECTIVES Structure denoting the set of format directives of a
format string. Depends on FCHAR_T.
PRINTF_PARSE Function that parses a format string.
Depends on FCHAR_T.
DCHAR_CPY memcpy like function for DCHAR_T[] arrays.
DCHAR_SET memset like function for DCHAR_T[] arrays.
DCHAR_MBSNLEN mbsnlen like function for DCHAR_T[] arrays.
SNPRINTF The system's snprintf (or similar) function.
This may be either snprintf or swprintf.
TCHAR_T The element type of the argument and result string
of the said SNPRINTF function. This may be either
char or wchar_t. The code exploits that
sizeof (TCHAR_T) | sizeof (DCHAR_T) and
alignof (TCHAR_T) <= alignof (DCHAR_T).
DCHAR_IS_TCHAR Set to 1 if DCHAR_T and TCHAR_T are the same type.
DCHAR_CONV_FROM_ENCODING A function to convert from char[] to DCHAR[].
DCHAR_IS_UINT8_T Set to 1 if DCHAR_T is uint8_t.
DCHAR_IS_UINT16_T Set to 1 if DCHAR_T is uint16_t.
DCHAR_IS_UINT32_T Set to 1 if DCHAR_T is uint32_t. */
/* Tell glibc's <stdio.h> to provide a prototype for snprintf().
This must come before <config.h> because <config.h> may include
<features.h>, and once <features.h> has been included, it's too late. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#ifndef VASNPRINTF
# include <config.h>
#endif
#ifndef IN_LIBINTL
# include <alloca.h>
#endif
/* Specification. */
#ifndef VASNPRINTF
# if WIDE_CHAR_VERSION
# include "vasnwprintf.h"
# else
# include "vasnprintf.h"
# endif
#endif
#include <locale.h> /* localeconv() */
#include <stdio.h> /* snprintf(), sprintf() */
#include <stdlib.h> /* abort(), malloc(), realloc(), free() */
#include <string.h> /* memcpy(), strlen() */
#include <errno.h> /* errno */
#include <limits.h> /* CHAR_BIT */
#include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */
#if HAVE_NL_LANGINFO
# include <langinfo.h>
#endif
#ifndef VASNPRINTF
# if WIDE_CHAR_VERSION
# include "wprintf-parse.h"
# else
# include "printf-parse.h"
# endif
#endif
/* Checked size_t computations. */
#include "xsize.h"
#if NEED_PRINTF_LONG_DOUBLE && !defined IN_LIBINTL
# include <math.h>
# include "float+.h"
# include "fpucw.h"
#endif
#if NEED_PRINTF_INFINITE_DOUBLE && !defined IN_LIBINTL
# include <math.h>
# include "isnan.h"
#endif
#if NEED_PRINTF_INFINITE_LONG_DOUBLE && !defined IN_LIBINTL
# include <math.h>
# include "isnanl-nolibm.h"
# include "fpucw.h"
#endif
#if NEED_PRINTF_DIRECTIVE_A && !defined IN_LIBINTL
# include <math.h>
# include "isnan.h"
# include "printf-frexp.h"
# include "isnanl-nolibm.h"
# include "printf-frexpl.h"
# include "fpucw.h"
#endif
/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
#ifndef EOVERFLOW
# define EOVERFLOW E2BIG
#endif
#if HAVE_WCHAR_T
# if HAVE_WCSLEN
# define local_wcslen wcslen
# else
/* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
a dependency towards this library, here is a local substitute.
Define this substitute only once, even if this file is included
twice in the same compilation unit. */
# ifndef local_wcslen_defined
# define local_wcslen_defined 1
static size_t
local_wcslen (const wchar_t *s)
{
const wchar_t *ptr;
for (ptr = s; *ptr != (wchar_t) 0; ptr++)
;
return ptr - s;
}
# endif
# endif
#endif
/* Default parameters. */
#ifndef VASNPRINTF
# if WIDE_CHAR_VERSION
# define VASNPRINTF vasnwprintf
# define FCHAR_T wchar_t
# define DCHAR_T wchar_t
# define TCHAR_T wchar_t
# define DCHAR_IS_TCHAR 1
# define DIRECTIVE wchar_t_directive
# define DIRECTIVES wchar_t_directives
# define PRINTF_PARSE wprintf_parse
# define DCHAR_CPY wmemcpy
# else
# define VASNPRINTF vasnprintf
# define FCHAR_T char
# define DCHAR_T char
# define TCHAR_T char
# define DCHAR_IS_TCHAR 1
# define DIRECTIVE char_directive
# define DIRECTIVES char_directives
# define PRINTF_PARSE printf_parse
# define DCHAR_CPY memcpy
# endif
#endif
#if WIDE_CHAR_VERSION
/* TCHAR_T is wchar_t. */
# define USE_SNPRINTF 1
# if HAVE_DECL__SNWPRINTF
/* On Windows, the function swprintf() has a different signature than
on Unix; we use the _snwprintf() function instead. */
# define SNPRINTF _snwprintf
# else
/* Unix. */
# define SNPRINTF swprintf
# endif
#else
/* TCHAR_T is char. */
# /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'.
But don't use it on BeOS, since BeOS snprintf produces no output if the
size argument is >= 0x3000000. */
# if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__
# define USE_SNPRINTF 1
# else
# define USE_SNPRINTF 0
# endif
# if HAVE_DECL__SNPRINTF
/* Windows. */
# define SNPRINTF _snprintf
# else
/* Unix. */
# define SNPRINTF snprintf
/* Here we need to call the native snprintf, not rpl_snprintf. */
# undef snprintf
# endif
#endif
/* Here we need to call the native sprintf, not rpl_sprintf. */
#undef sprintf
#if NEED_PRINTF_DIRECTIVE_A && !defined IN_LIBINTL
/* Determine the decimal-point character according to the current locale. */
# ifndef decimal_point_char_defined
# define decimal_point_char_defined 1
static char
decimal_point_char ()
{
const char *point;
/* Determine it in a multithread-safe way. We know nl_langinfo is
multithread-safe on glibc systems, but is not required to be multithread-
safe by POSIX. sprintf(), however, is multithread-safe. localeconv()
is rarely multithread-safe. */
# if HAVE_NL_LANGINFO && __GLIBC__
point = nl_langinfo (RADIXCHAR);
# elif 1
char pointbuf[5];
sprintf (pointbuf, "%#.0f", 1.0);
point = &pointbuf[1];
# else
point = localeconv () -> decimal_point;
# endif
/* The decimal point is always a single byte: either '.' or ','. */
return (point[0] != '\0' ? point[0] : '.');
}
# endif
#endif
#if NEED_PRINTF_INFINITE_DOUBLE && !defined IN_LIBINTL
/* Equivalent to !isfinite(x) || x == 0, but does not require libm. */
static int
is_infinite_or_zero (double x)
{
return isnan (x) || x + x == x;
}
#endif
#if NEED_PRINTF_INFINITE_LONG_DOUBLE && !defined IN_LIBINTL
/* Equivalent to !isfinite(x), but does not require libm. */
static int
is_infinitel (long double x)
{
return isnanl (x) || (x + x == x && x != 0.0L);
}
#endif
#if NEED_PRINTF_LONG_DOUBLE && !defined IN_LIBINTL
/* Converting 'long double' to decimal without rare rounding bugs requires
real bignums. We use the naming conventions of GNU gmp, but vastly simpler
(and slower) algorithms. */
typedef unsigned int mp_limb_t;
# define GMP_LIMB_BITS 32
typedef int mp_limb_verify[2 * (sizeof (mp_limb_t) * CHAR_BIT == GMP_LIMB_BITS) - 1];
typedef unsigned long long mp_twolimb_t;
# define GMP_TWOLIMB_BITS 64
typedef int mp_twolimb_verify[2 * (sizeof (mp_twolimb_t) * CHAR_BIT == GMP_TWOLIMB_BITS) - 1];
/* Representation of a bignum >= 0. */
typedef struct
{
size_t nlimbs;
mp_limb_t *limbs; /* Bits in little-endian order, allocated with malloc(). */
} mpn_t;
/* Compute the product of two bignums >= 0.
Return the allocated memory in case of success, NULL in case of memory
allocation failure. */
static void *
multiply (mpn_t src1, mpn_t src2, mpn_t *dest)
{
const mp_limb_t *p1;
const mp_limb_t *p2;
size_t len1;
size_t len2;
if (src1.nlimbs <= src2.nlimbs)
{
len1 = src1.nlimbs;
p1 = src1.limbs;
len2 = src2.nlimbs;
p2 = src2.limbs;
}
else
{
len1 = src2.nlimbs;
p1 = src2.limbs;
len2 = src1.nlimbs;
p2 = src1.limbs;
}
/* Now 0 <= len1 <= len2. */
if (len1 == 0)
{
/* src1 or src2 is zero. */
dest->nlimbs = 0;
dest->limbs = (mp_limb_t *) malloc (1);
}
else
{
/* Here 1 <= len1 <= len2. */
size_t dlen;
mp_limb_t *dp;
size_t k, i, j;
dlen = len1 + len2;
dp = (mp_limb_t *) malloc (dlen * sizeof (mp_limb_t));
if (dp == NULL)
return NULL;
for (k = len2; k > 0; )
dp[--k] = 0;
for (i = 0; i < len1; i++)
{
mp_limb_t digit1 = p1[i];
mp_twolimb_t carry = 0;
for (j = 0; j < len2; j++)
{
mp_limb_t digit2 = p2[j];
carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2;
carry += dp[i + j];
dp[i + j] = (mp_limb_t) carry;
carry = carry >> GMP_LIMB_BITS;
}
dp[i + len2] = (mp_limb_t) carry;
}
/* Normalise. */
while (dlen > 0 && dp[dlen - 1] == 0)
dlen--;
dest->nlimbs = dlen;
dest->limbs = dp;
}
return dest->limbs;
}
/* Compute the quotient of a bignum a >= 0 and a bignum b > 0.
a is written as a = q * b + r with 0 <= r < b. q is the quotient, r
the remainder.
Finally, round-to-even is performed: If r > b/2 or if r = b/2 and q is odd,
q is incremented.
Return the allocated memory in case of success, NULL in case of memory
allocation failure. */
static void *
divide (mpn_t a, mpn_t b, mpn_t *q)
{
/* Algorithm:
First normalise a and b: a=[a[m-1],...,a[0]], b=[b[n-1],...,b[0]]
with m>=0 and n>0 (in base beta = 2^GMP_LIMB_BITS).
If m<n, then q:=0 and r:=a.
If m>=n=1, perform a single-precision division:
r:=0, j:=m,
while j>0 do
{Here (q[m-1]*beta^(m-1)+...+q[j]*beta^j) * b[0] + r*beta^j =
= a[m-1]*beta^(m-1)+...+a[j]*beta^j und 0<=r<b[0]<beta}
j:=j-1, r:=r*beta+a[j], q[j]:=floor(r/b[0]), r:=r-b[0]*q[j].
Normalise [q[m-1],...,q[0]], yields q.
If m>=n>1, perform a multiple-precision division:
We have a/b < beta^(m-n+1).
s:=intDsize-1-(hightest bit in b[n-1]), 0<=s<intDsize.
Shift a and b left by s bits, copying them. r:=a.
r=[r[m],...,r[0]], b=[b[n-1],...,b[0]] with b[n-1]>=beta/2.
For j=m-n,...,0: {Here 0 <= r < b*beta^(j+1).}
Compute q* :
q* := floor((r[j+n]*beta+r[j+n-1])/b[n-1]).
In case of overflow (q* >= beta) set q* := beta-1.
Compute c2 := ((r[j+n]*beta+r[j+n-1]) - q* * b[n-1])*beta + r[j+n-2]
and c3 := b[n-2] * q*.
{We have 0 <= c2 < 2*beta^2, even 0 <= c2 < beta^2 if no overflow
occurred. Furthermore 0 <= c3 < beta^2.
If there was overflow and
r[j+n]*beta+r[j+n-1] - q* * b[n-1] >= beta, i.e. c2 >= beta^2,
the next test can be skipped.}
While c3 > c2, {Here 0 <= c2 < c3 < beta^2}
Put q* := q* - 1, c2 := c2 + b[n-1]*beta, c3 := c3 - b[n-2].
If q* > 0:
Put r := r - b * q* * beta^j. In detail:
[r[n+j],...,r[j]] := [r[n+j],...,r[j]] - q* * [b[n-1],...,b[0]].
hence: u:=0, for i:=0 to n-1 do
u := u + q* * b[i],
r[j+i]:=r[j+i]-(u mod beta) (+ beta, if carry),
u:=u div beta (+ 1, if carry in subtraction)
r[n+j]:=r[n+j]-u.
{Since always u = (q* * [b[i-1],...,b[0]] div beta^i) + 1
< q* + 1 <= beta,
the carry u does not overflow.}
If a negative carry occurs, put q* := q* - 1
and [r[n+j],...,r[j]] := [r[n+j],...,r[j]] + [0,b[n-1],...,b[0]].
Set q[j] := q*.
Normalise [q[m-n],..,q[0]]; this yields the quotient q.
Shift [r[n-1],...,r[0]] right by s bits and normalise; this yields the
rest r.
The room for q[j] can be allocated at the memory location of r[n+j].
Finally, round-to-even:
Shift r left by 1 bit.
If r > b or if r = b and q[0] is odd, q := q+1.
*/
const mp_limb_t *a_ptr = a.limbs;
size_t a_len = a.nlimbs;
const mp_limb_t *b_ptr = b.limbs;
size_t b_len = b.nlimbs;
mp_limb_t *roomptr;
mp_limb_t *tmp_roomptr = NULL;
mp_limb_t *q_ptr;
size_t q_len;
mp_limb_t *r_ptr;
size_t r_len;
/* Allocate room for a_len+2 digits.
(Need a_len+1 digits for the real division and 1 more digit for the
final rounding of q.) */
roomptr = (mp_limb_t *) malloc ((a_len + 2) * sizeof (mp_limb_t));
if (roomptr == NULL)
return NULL;
/* Normalise a. */
while (a_len > 0 && a_ptr[a_len - 1] == 0)
a_len--;
/* Normalise b. */
for (;;)
{
if (b_len == 0)
/* Division by zero. */
abort ();
if (b_ptr[b_len - 1] == 0)
b_len--;
else
break;
}
/* Here m = a_len >= 0 and n = b_len > 0. */
if (a_len < b_len)
{
/* m<n: trivial case. q=0, r := copy of a. */
r_ptr = roomptr;
r_len = a_len;
memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t));
q_ptr = roomptr + a_len;
q_len = 0;
}
else if (b_len == 1)
{
/* n=1: single precision division.
beta^(m-1) <= a < beta^m ==> beta^(m-2) <= a/b < beta^m */
r_ptr = roomptr;
q_ptr = roomptr + 1;
{
mp_limb_t den = b_ptr[0];
mp_limb_t remainder = 0;
const mp_limb_t *sourceptr = a_ptr + a_len;
mp_limb_t *destptr = q_ptr + a_len;
size_t count;
for (count = a_len; count > 0; count--)
{
mp_twolimb_t num =
((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--sourceptr;
*--destptr = num / den;
remainder = num % den;
}
/* Normalise and store r. */
if (remainder > 0)
{
r_ptr[0] = remainder;
r_len = 1;
}
else
r_len = 0;
/* Normalise q. */
q_len = a_len;
if (q_ptr[q_len - 1] == 0)
q_len--;
}
}
else
{
/* n>1: multiple precision division.
beta^(m-1) <= a < beta^m, beta^(n-1) <= b < beta^n ==>
beta^(m-n-1) <= a/b < beta^(m-n+1). */
/* Determine s. */
size_t s;
{
mp_limb_t msd = b_ptr[b_len - 1]; /* = b[n-1], > 0 */
s = 31;
if (msd >= 0x10000)
{
msd = msd >> 16;
s -= 16;
}
if (msd >= 0x100)
{
msd = msd >> 8;
s -= 8;
}
if (msd >= 0x10)
{
msd = msd >> 4;
s -= 4;
}
if (msd >= 0x4)
{
msd = msd >> 2;
s -= 2;
}
if (msd >= 0x2)
{
msd = msd >> 1;
s -= 1;
}
}
/* 0 <= s < GMP_LIMB_BITS.
Copy b, shifting it left by s bits. */
if (s > 0)
{
tmp_roomptr = (mp_limb_t *) malloc (b_len * sizeof (mp_limb_t));
if (tmp_roomptr == NULL)
{
free (roomptr);
return NULL;
}
{
const mp_limb_t *sourceptr = b_ptr;
mp_limb_t *destptr = tmp_roomptr;
mp_twolimb_t accu = 0;
size_t count;
for (count = b_len; count > 0; count--)
{
accu += (mp_twolimb_t) *sourceptr++ << s;
*destptr++ = (mp_limb_t) accu;
accu = accu >> GMP_LIMB_BITS;
}
/* accu must be zero, since that was how s was determined. */
if (accu != 0)
abort ();
}
b_ptr = tmp_roomptr;
}
/* Copy a, shifting it left by s bits, yields r.
Memory layout:
At the beginning: r = roomptr[0..a_len],
at the end: r = roomptr[0..b_len-1], q = roomptr[b_len..a_len] */
r_ptr = roomptr;
if (s == 0)
{
memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t));
r_ptr[a_len] = 0;
}
else
{
const mp_limb_t *sourceptr = a_ptr;
mp_limb_t *destptr = r_ptr;
mp_twolimb_t accu = 0;
size_t count;
for (count = a_len; count > 0; count--)
{
accu += (mp_twolimb_t) *sourceptr++ << s;
*destptr++ = (mp_limb_t) accu;
accu = accu >> GMP_LIMB_BITS;
}
*destptr++ = (mp_limb_t) accu;
}
q_ptr = roomptr + b_len;
q_len = a_len - b_len + 1; /* q will have m-n+1 limbs */
{
size_t j = a_len - b_len; /* m-n */
mp_limb_t b_msd = b_ptr[b_len - 1]; /* b[n-1] */
mp_limb_t b_2msd = b_ptr[b_len - 2]; /* b[n-2] */
mp_twolimb_t b_msdd = /* b[n-1]*beta+b[n-2] */
((mp_twolimb_t) b_msd << GMP_LIMB_BITS) | b_2msd;
/* Division loop, traversed m-n+1 times.
j counts down, b is unchanged, beta/2 <= b[n-1] < beta. */
for (;;)
{
mp_limb_t q_star;
mp_limb_t c1;
if (r_ptr[j + b_len] < b_msd) /* r[j+n] < b[n-1] ? */
{
/* Divide r[j+n]*beta+r[j+n-1] by b[n-1], no overflow. */
mp_twolimb_t num =
((mp_twolimb_t) r_ptr[j + b_len] << GMP_LIMB_BITS)
| r_ptr[j + b_len - 1];
q_star = num / b_msd;
c1 = num % b_msd;
}
else
{
/* Overflow, hence r[j+n]*beta+r[j+n-1] >= beta*b[n-1]. */
q_star = (mp_limb_t)~(mp_limb_t)0; /* q* = beta-1 */
/* Test whether r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] >= beta
<==> r[j+n]*beta+r[j+n-1] + b[n-1] >= beta*b[n-1]+beta
<==> b[n-1] < floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta)
{<= beta !}.
If yes, jump directly to the subtraction loop.
(Otherwise, r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] < beta
<==> floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta) = b[n-1] ) */
if (r_ptr[j + b_len] > b_msd
|| (c1 = r_ptr[j + b_len - 1] + b_msd) < b_msd)
/* r[j+n] >= b[n-1]+1 or
r[j+n] = b[n-1] and the addition r[j+n-1]+b[n-1] gives a
carry. */
goto subtract;
}
/* q_star = q*,
c1 = (r[j+n]*beta+r[j+n-1]) - q* * b[n-1] (>=0, <beta). */
{
mp_twolimb_t c2 = /* c1*beta+r[j+n-2] */
((mp_twolimb_t) c1 << GMP_LIMB_BITS) | r_ptr[j + b_len - 2];
mp_twolimb_t c3 = /* b[n-2] * q* */
(mp_twolimb_t) b_2msd * (mp_twolimb_t) q_star;
/* While c2 < c3, increase c2 and decrease c3.
Consider c3-c2. While it is > 0, decrease it by
b[n-1]*beta+b[n-2]. Because of b[n-1]*beta+b[n-2] >= beta^2/2
this can happen only twice. */
if (c3 > c2)
{
q_star = q_star - 1; /* q* := q* - 1 */
if (c3 - c2 > b_msdd)
q_star = q_star - 1; /* q* := q* - 1 */
}
}
if (q_star > 0)
subtract:
{
/* Subtract r := r - b * q* * beta^j. */
mp_limb_t cr;
{
const mp_limb_t *sourceptr = b_ptr;
mp_limb_t *destptr = r_ptr + j;
mp_twolimb_t carry = 0;
size_t count;
for (count = b_len; count > 0; count--)
{
/* Here 0 <= carry <= q*. */
carry =
carry
+ (mp_twolimb_t) q_star * (mp_twolimb_t) *sourceptr++
+ (mp_limb_t) ~(*destptr);
/* Here 0 <= carry <= beta*q* + beta-1. */
*destptr++ = ~(mp_limb_t) carry;
carry = carry >> GMP_LIMB_BITS; /* <= q* */
}
cr = (mp_limb_t) carry;
}
/* Subtract cr from r_ptr[j + b_len], then forget about
r_ptr[j + b_len]. */
if (cr > r_ptr[j + b_len])
{
/* Subtraction gave a carry. */
q_star = q_star - 1; /* q* := q* - 1 */
/* Add b back. */
{
const mp_limb_t *sourceptr = b_ptr;
mp_limb_t *destptr = r_ptr + j;
mp_limb_t carry = 0;
size_t count;
for (count = b_len; count > 0; count--)
{
mp_limb_t source1 = *sourceptr++;
mp_limb_t source2 = *destptr;
*destptr++ = source1 + source2 + carry;
carry =
(carry
? source1 >= (mp_limb_t) ~source2
: source1 > (mp_limb_t) ~source2);
}
}
/* Forget about the carry and about r[j+n]. */
}
}
/* q* is determined. Store it as q[j]. */
q_ptr[j] = q_star;
if (j == 0)
break;
j--;
}
}
r_len = b_len;
/* Normalise q. */
if (q_ptr[q_len - 1] == 0)
q_len--;
# if 0 /* Not needed here, since we need r only to compare it with b/2, and
b is shifted left by s bits. */
/* Shift r right by s bits. */
if (s > 0)
{
mp_limb_t ptr = r_ptr + r_len;
mp_twolimb_t accu = 0;
size_t count;
for (count = r_len; count > 0; count--)
{
accu = (mp_twolimb_t) (mp_limb_t) accu << GMP_LIMB_BITS;
accu += (mp_twolimb_t) *--ptr << (GMP_LIMB_BITS - s);
*ptr = (mp_limb_t) (accu >> GMP_LIMB_BITS);
}
}
# endif
/* Normalise r. */
while (r_len > 0 && r_ptr[r_len - 1] == 0)
r_len--;
}
/* Compare r << 1 with b. */
if (r_len > b_len)
goto increment_q;
{
size_t i;
for (i = b_len;;)
{
mp_limb_t r_i =
(i <= r_len && i > 0 ? r_ptr[i - 1] >> (GMP_LIMB_BITS - 1) : 0)
| (i < r_len ? r_ptr[i] << 1 : 0);
mp_limb_t b_i = (i < b_len ? b_ptr[i] : 0);
if (r_i > b_i)
goto increment_q;
if (r_i < b_i)
goto keep_q;
if (i == 0)
break;
i--;
}
}
if (q_len > 0 && ((q_ptr[0] & 1) != 0))
/* q is odd. */
increment_q:
{
size_t i;
for (i = 0; i < q_len; i++)
if (++(q_ptr[i]) != 0)
goto keep_q;
q_ptr[q_len++] = 1;
}
keep_q:
if (tmp_roomptr != NULL)
free (tmp_roomptr);
q->limbs = q_ptr;
q->nlimbs = q_len;
return roomptr;
}
/* Convert a bignum a >= 0, multiplied with 10^extra_zeroes, to decimal
representation.
Destroys the contents of a.
Return the allocated memory - containing the decimal digits in low-to-high
order, terminated with a NUL character - in case of success, NULL in case
of memory allocation failure. */
static char *
convert_to_decimal (mpn_t a, size_t extra_zeroes)
{
mp_limb_t *a_ptr = a.limbs;
size_t a_len = a.nlimbs;
/* 0.03345 is slightly larger than log(2)/(9*log(10)). */
size_t c_len = 9 * ((size_t)(a_len * (GMP_LIMB_BITS * 0.03345f)) + 1);
char *c_ptr = (char *) malloc (xsum (c_len, extra_zeroes));
if (c_ptr != NULL)
{
char *d_ptr = c_ptr;
for (; extra_zeroes > 0; extra_zeroes--)
*d_ptr++ = '0';
while (a_len > 0)
{
/* Divide a by 10^9, in-place. */
mp_limb_t remainder = 0;
mp_limb_t *ptr = a_ptr + a_len;
size_t count;
for (count = a_len; count > 0; count--)
{
mp_twolimb_t num =
((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--ptr;
*ptr = num / 1000000000;
remainder = num % 1000000000;
}
/* Store the remainder as 9 decimal digits. */
for (count = 9; count > 0; count--)
{
*d_ptr++ = '0' + (remainder % 10);
remainder = remainder / 10;
}
/* Normalize a. */
if (a_ptr[a_len - 1] == 0)
a_len--;
}
/* Remove leading zeroes. */
while (d_ptr > c_ptr && d_ptr[-1] == '0')
d_ptr--;
/* But keep at least one zero. */
if (d_ptr == c_ptr)
*d_ptr++ = '0';
/* Terminate the string. */
*d_ptr = '\0';
}
return c_ptr;
}
/* Assuming x is finite and >= 0:
write x as x = 2^e * m, where m is a bignum.
Return the allocated memory in case of success, NULL in case of memory
allocation failure. */
static void *
decode_long_double (long double x, int *ep, mpn_t *mp)
{
mpn_t m;
int exp;
long double y;
size_t i;
/* Allocate memory for result. */
m.nlimbs = (LDBL_MANT_BIT + GMP_LIMB_BITS - 1) / GMP_LIMB_BITS;
m.limbs = (mp_limb_t *) malloc (m.nlimbs * sizeof (mp_limb_t));
if (m.limbs == NULL)
return NULL;
/* Split into exponential part and mantissa. */
y = frexpl (x, &exp);
if (!(y >= 0.0L && y < 1.0L))
abort ();
/* x = 2^exp * y = 2^(exp - LDBL_MANT_BIT) * (y * LDBL_MANT_BIT), and the
latter is an integer. */
/* Convert the mantissa (y * LDBL_MANT_BIT) to a sequence of limbs.
I'm not sure whether it's safe to cast a 'long double' value between
2^31 and 2^32 to 'unsigned int', therefore play safe and cast only
'long double' values between 0 and 2^16 (to 'unsigned int' or 'int',
doesn't matter). */
# if (LDBL_MANT_BIT % GMP_LIMB_BITS) != 0
# if (LDBL_MANT_BIT % GMP_LIMB_BITS) > GMP_LIMB_BITS / 2
{
mp_limb_t hi, lo;
y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % (GMP_LIMB_BITS / 2));
hi = (int) y;
y -= hi;
if (!(y >= 0.0L && y < 1.0L))
abort ();
y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
lo = (int) y;
y -= lo;
if (!(y >= 0.0L && y < 1.0L))
abort ();
m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = (hi << (GMP_LIMB_BITS / 2)) | lo;
}
# else
{
mp_limb_t d;
y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % GMP_LIMB_BITS);
d = (int) y;
y -= d;
if (!(y >= 0.0L && y < 1.0L))
abort ();
m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = d;
}
# endif
# endif
for (i = LDBL_MANT_BIT / GMP_LIMB_BITS; i > 0; )
{
mp_limb_t hi, lo;
y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
hi = (int) y;
y -= hi;
if (!(y >= 0.0L && y < 1.0L))
abort ();
y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2);
lo = (int) y;
y -= lo;
if (!(y >= 0.0L && y < 1.0L))
abort ();
m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo;
}
if (!(y == 0.0L))
abort ();
/* Normalise. */
while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0)
m.nlimbs--;
*mp = m;
*ep = exp - LDBL_MANT_BIT;
return m.limbs;
}
/* Assuming x is finite and >= 0, and n is an integer:
Returns the decimal representation of round (x * 10^n).
Return the allocated memory - containing the decimal digits in low-to-high
order, terminated with a NUL character - in case of success, NULL in case
of memory allocation failure. */
static char *
scale10_round_decimal_long_double (long double x, int n)
{
int e;
mpn_t m;
void *memory = decode_long_double (x, &e, &m);
int s;
size_t extra_zeroes;
unsigned int abs_n;
unsigned int abs_s;
mp_limb_t *pow5_ptr;
size_t pow5_len;
unsigned int s_limbs;
unsigned int s_bits;
mpn_t pow5;
mpn_t z;
void *z_memory;
char *digits;
if (memory == NULL)
return NULL;
/* x = 2^e * m, hence
y = round (2^e * 10^n * m) = round (2^(e+n) * 5^n * m)
= round (2^s * 5^n * m). */
s = e + n;
extra_zeroes = 0;
/* Factor out a common power of 10 if possible. */
if (s > 0 && n > 0)
{
extra_zeroes = (s < n ? s : n);
s -= extra_zeroes;
n -= extra_zeroes;
}
/* Here y = round (2^s * 5^n * m) * 10^extra_zeroes.
Before converting to decimal, we need to compute
z = round (2^s * 5^n * m). */
/* Compute 5^|n|, possibly shifted by |s| bits if n and s have the same
sign. 2.322 is slightly larger than log(5)/log(2). */
abs_n = (n >= 0 ? n : -n);
abs_s = (s >= 0 ? s : -s);
pow5_ptr = (mp_limb_t *) malloc (((int)(abs_n * (2.322f / GMP_LIMB_BITS)) + 1
+ abs_s / GMP_LIMB_BITS + 1)
* sizeof (mp_limb_t));
if (pow5_ptr == NULL)
{
free (memory);
return NULL;
}
/* Initialize with 1. */
pow5_ptr[0] = 1;
pow5_len = 1;
/* Multiply with 5^|n|. */
if (abs_n > 0)
{
static mp_limb_t const small_pow5[13 + 1] =
{
1, 5, 25, 125, 625, 3125, 15625, 78125, 390625, 1953125, 9765625,
48828125, 244140625, 1220703125
};
unsigned int n13;
for (n13 = 0; n13 <= abs_n; n13 += 13)
{
mp_limb_t digit1 = small_pow5[n13 + 13 <= abs_n ? 13 : abs_n - n13];
size_t j;
mp_twolimb_t carry = 0;
for (j = 0; j < pow5_len; j++)
{
mp_limb_t digit2 = pow5_ptr[j];
carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2;
pow5_ptr[j] = (mp_limb_t) carry;
carry = carry >> GMP_LIMB_BITS;
}
if (carry > 0)
pow5_ptr[pow5_len++] = (mp_limb_t) carry;
}
}
s_limbs = abs_s / GMP_LIMB_BITS;
s_bits = abs_s % GMP_LIMB_BITS;
if (n >= 0 ? s >= 0 : s <= 0)
{
/* Multiply with 2^|s|. */
if (s_bits > 0)
{
mp_limb_t *ptr = pow5_ptr;
mp_twolimb_t accu = 0;
size_t count;
for (count = pow5_len; count > 0; count--)
{
accu += (mp_twolimb_t) *ptr << s_bits;
*ptr++ = (mp_limb_t) accu;
accu = accu >> GMP_LIMB_BITS;
}
if (accu > 0)
{
*ptr = (mp_limb_t) accu;
pow5_len++;
}
}
if (s_limbs > 0)
{
size_t count;
for (count = pow5_len; count > 0;)
{
count--;
pow5_ptr[s_limbs + count] = pow5_ptr[count];
}
for (count = s_limbs; count > 0;)
{
count--;
pow5_ptr[count] = 0;
}
pow5_len += s_limbs;
}
pow5.limbs = pow5_ptr;
pow5.nlimbs = pow5_len;
if (n >= 0)
{
/* Multiply m with pow5. No division needed. */
z_memory = multiply (m, pow5, &z);
}
else
{
/* Divide m by pow5 and round. */
z_memory = divide (m, pow5, &z);
}
}
else
{
pow5.limbs = pow5_ptr;
pow5.nlimbs = pow5_len;
if (n >= 0)
{
/* n >= 0, s < 0.
Multiply m with pow5, then divide by 2^|s|. */
mpn_t numerator;
mpn_t denominator;
void *tmp_memory;
tmp_memory = multiply (m, pow5, &numerator);
if (tmp_memory == NULL)
{
free (pow5_ptr);
free (memory);
return NULL;
}
/* Construct 2^|s|. */
{
mp_limb_t *ptr = pow5_ptr + pow5_len;
size_t i;
for (i = 0; i < s_limbs; i++)
ptr[i] = 0;
ptr[s_limbs] = (mp_limb_t) 1 << s_bits;
denominator.limbs = ptr;
denominator.nlimbs = s_limbs + 1;
}
z_memory = divide (numerator, denominator, &z);
free (tmp_memory);
}
else
{
/* n < 0, s > 0.
Multiply m with 2^s, then divide by pow5. */
mpn_t numerator;
mp_limb_t *num_ptr;
num_ptr = (mp_limb_t *) malloc ((m.nlimbs + s_limbs + 1)
* sizeof (mp_limb_t));
if (num_ptr == NULL)
{
free (pow5_ptr);
free (memory);
return NULL;
}
{
mp_limb_t *destptr = num_ptr;
{
size_t i;
for (i = 0; i < s_limbs; i++)
*destptr++ = 0;
}
if (s_bits > 0)
{
const mp_limb_t *sourceptr = m.limbs;
mp_twolimb_t accu = 0;
size_t count;
for (count = m.nlimbs; count > 0; count--)
{
accu += (mp_twolimb_t) *sourceptr++ << s;
*destptr++ = (mp_limb_t) accu;
accu = accu >> GMP_LIMB_BITS;
}
if (accu > 0)
*destptr++ = (mp_limb_t) accu;
}
else
{
const mp_limb_t *sourceptr = m.limbs;
size_t count;
for (count = m.nlimbs; count > 0; count--)
*destptr++ = *sourceptr++;
}
numerator.limbs = num_ptr;
numerator.nlimbs = destptr - num_ptr;
}
z_memory = divide (numerator, pow5, &z);
free (num_ptr);
}
}
free (pow5_ptr);
free (memory);
/* Here y = round (x * 10^n) = z * 10^extra_zeroes. */
if (z_memory == NULL)
return NULL;
digits = convert_to_decimal (z, extra_zeroes);
free (z_memory);
return digits;
}
/* Assuming x is finite and > 0:
Return an approximation for n with 10^n <= x < 10^(n+1).
The approximation is usually the right n, but may be off by 1 sometimes. */
static int
floorlog10l (long double x)
{
int exp;
long double y;
double z;
double l;
/* Split into exponential part and mantissa. */
y = frexpl (x, &exp);
if (!(y >= 0.0L && y < 1.0L))
abort ();
if (y == 0.0L)
return INT_MIN;
if (y < 0.5L)
{
while (y < (1.0L / (1 << (GMP_LIMB_BITS / 2)) / (1 << (GMP_LIMB_BITS / 2))))
{
y *= 1.0L * (1 << (GMP_LIMB_BITS / 2)) * (1 << (GMP_LIMB_BITS / 2));
exp -= GMP_LIMB_BITS;
}
if (y < (1.0L / (1 << 16)))
{
y *= 1.0L * (1 << 16);
exp -= 16;
}
if (y < (1.0L / (1 << 8)))
{
y *= 1.0L * (1 << 8);
exp -= 8;
}
if (y < (1.0L / (1 << 4)))
{
y *= 1.0L * (1 << 4);
exp -= 4;
}
if (y < (1.0L / (1 << 2)))
{
y *= 1.0L * (1 << 2);
exp -= 2;
}
if (y < (1.0L / (1 << 1)))
{
y *= 1.0L * (1 << 1);
exp -= 1;
}
}
if (!(y >= 0.5L && y < 1.0L))
abort ();
/* Compute an approximation for l = log2(x) = exp + log2(y). */
l = exp;
z = y;
if (z < 0.70710678118654752444)
{
z *= 1.4142135623730950488;
l -= 0.5;
}
if (z < 0.8408964152537145431)
{
z *= 1.1892071150027210667;
l -= 0.25;
}
if (z < 0.91700404320467123175)
{
z *= 1.0905077326652576592;
l -= 0.125;
}
if (z < 0.9576032806985736469)
{
z *= 1.0442737824274138403;
l -= 0.0625;
}
/* Now 0.95 <= z <= 1.01. */
z = 1 - z;
/* log(1-z) = - z - z^2/2 - z^3/3 - z^4/4 - ...
Four terms are enough to get an approximation with error < 10^-7. */
l -= z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25)));
/* Finally multiply with log(2)/log(10), yields an approximation for
log10(x). */
l *= 0.30102999566398119523;
/* Round down to the next integer. */
return (int) l + (l < 0 ? -1 : 0);
}
#endif
DCHAR_T *
VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
const FCHAR_T *format, va_list args)
{
DIRECTIVES d;
arguments a;
if (PRINTF_PARSE (format, &d, &a) < 0)
{
errno = EINVAL;
return NULL;
}
#define CLEANUP() \
free (d.dir); \
if (a.arg) \
free (a.arg);
if (PRINTF_FETCHARGS (args, &a) < 0)
{
CLEANUP ();
errno = EINVAL;
return NULL;
}
{
size_t buf_neededlength;
TCHAR_T *buf;
TCHAR_T *buf_malloced;
const FCHAR_T *cp;
size_t i;
DIRECTIVE *dp;
/* Output string accumulator. */
DCHAR_T *result;
size_t allocated;
size_t length;
/* Allocate a small buffer that will hold a directive passed to
sprintf or snprintf. */
buf_neededlength =
xsum4 (7, d.max_width_length, d.max_precision_length, 6);
#if HAVE_ALLOCA
if (buf_neededlength < 4000 / sizeof (TCHAR_T))
{
buf = (TCHAR_T *) alloca (buf_neededlength * sizeof (TCHAR_T));
buf_malloced = NULL;
}
else
#endif
{
size_t buf_memsize = xtimes (buf_neededlength, sizeof (TCHAR_T));
if (size_overflow_p (buf_memsize))
goto out_of_memory_1;
buf = (TCHAR_T *) malloc (buf_memsize);
if (buf == NULL)
goto out_of_memory_1;
buf_malloced = buf;
}
if (resultbuf != NULL)
{
result = resultbuf;
allocated = *lengthp;
}
else
{
result = NULL;
allocated = 0;
}
length = 0;
/* Invariants:
result is either == resultbuf or == NULL or malloc-allocated.
If length > 0, then result != NULL. */
/* Ensures that allocated >= needed. Aborts through a jump to
out_of_memory if needed is SIZE_MAX or otherwise too big. */
#define ENSURE_ALLOCATION(needed) \
if ((needed) > allocated) \
{ \
size_t memory_size; \
DCHAR_T *memory; \
\
allocated = (allocated > 0 ? xtimes (allocated, 2) : 12); \
if ((needed) > allocated) \
allocated = (needed); \
memory_size = xtimes (allocated, sizeof (DCHAR_T)); \
if (size_overflow_p (memory_size)) \
goto out_of_memory; \
if (result == resultbuf || result == NULL) \
memory = (DCHAR_T *) malloc (memory_size); \
else \
memory = (DCHAR_T *) realloc (result, memory_size); \
if (memory == NULL) \
goto out_of_memory; \
if (result == resultbuf && length > 0) \
DCHAR_CPY (memory, result, length); \
result = memory; \
}
for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
{
if (cp != dp->dir_start)
{
size_t n = dp->dir_start - cp;
size_t augmented_length = xsum (length, n);
ENSURE_ALLOCATION (augmented_length);
/* This copies a piece of FCHAR_T[] into a DCHAR_T[]. Here we
need that the format string contains only ASCII characters
if FCHAR_T and DCHAR_T are not the same type. */
if (sizeof (FCHAR_T) == sizeof (DCHAR_T))
{
DCHAR_CPY (result + length, (const DCHAR_T *) cp, n);
length = augmented_length;
}
else
{
do
result[length++] = (unsigned char) *cp++;
while (--n > 0);
}
}
if (i == d.count)
break;
/* Execute a single directive. */
if (dp->conversion == '%')
{
size_t augmented_length;
if (!(dp->arg_index == ARG_NONE))
abort ();
augmented_length = xsum (length, 1);
ENSURE_ALLOCATION (augmented_length);
result[length] = '%';
length = augmented_length;
}
else
{
if (!(dp->arg_index != ARG_NONE))
abort ();
if (dp->conversion == 'n')
{
switch (a.arg[dp->arg_index].type)
{
case TYPE_COUNT_SCHAR_POINTER:
*a.arg[dp->arg_index].a.a_count_schar_pointer = length;
break;
case TYPE_COUNT_SHORT_POINTER:
*a.arg[dp->arg_index].a.a_count_short_pointer = length;
break;
case TYPE_COUNT_INT_POINTER:
*a.arg[dp->arg_index].a.a_count_int_pointer = length;
break;
case TYPE_COUNT_LONGINT_POINTER:
*a.arg[dp->arg_index].a.a_count_longint_pointer = length;
break;
#if HAVE_LONG_LONG_INT
case TYPE_COUNT_LONGLONGINT_POINTER:
*a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
break;
#endif
default:
abort ();
}
}
#if ENABLE_UNISTDIO
/* The unistdio extensions. */
else if (dp->conversion == 'U')
{
arg_type type = a.arg[dp->arg_index].type;
int flags = dp->flags;
int has_width;
size_t width;
int has_precision;
size_t precision;
has_width = 0;
width = 0;
if (dp->width_start != dp->width_end)
{
if (dp->width_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
if (arg < 0)
{
/* "A negative field width is taken as a '-' flag
followed by a positive field width." */
flags |= FLAG_LEFT;
width = (unsigned int) (-arg);
}
else
width = arg;
}
else
{
const FCHAR_T *digitp = dp->width_start;
do
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
has_width = 1;
}
has_precision = 0;
precision = 0;
if (dp->precision_start != dp->precision_end)
{
if (dp->precision_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->precision_arg_index].a.a_int;
/* "A negative precision is taken as if the precision
were omitted." */
if (arg >= 0)
{
precision = arg;
has_precision = 1;
}
}
else
{
const FCHAR_T *digitp = dp->precision_start + 1;
precision = 0;
while (digitp != dp->precision_end)
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
has_precision = 1;
}
}
switch (type)
{
case TYPE_U8_STRING:
{
const uint8_t *arg = a.arg[dp->arg_index].a.a_u8_string;
const uint8_t *arg_end;
size_t characters;
if (has_precision)
{
/* Use only PRECISION characters, from the left. */
arg_end = arg;
characters = 0;
for (; precision > 0; precision--)
{
int count = u8_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else if (has_width)
{
/* Use the entire string, and count the number of
characters. */
arg_end = arg;
characters = 0;
for (;;)
{
int count = u8_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else
{
/* Use the entire string. */
arg_end = arg + u8_strlen (arg);
/* The number of characters doesn't matter. */
characters = 0;
}
if (has_width && width > characters
&& !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
# if DCHAR_IS_UINT8_T
{
size_t n = arg_end - arg;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_CPY (result + length, arg, n);
length += n;
}
# else
{ /* Convert. */
DCHAR_T *converted = result + length;
size_t converted_len = allocated - length;
# if DCHAR_IS_TCHAR
/* Convert from UTF-8 to locale encoding. */
if (u8_conv_to_encoding (locale_charset (),
iconveh_question_mark,
arg, arg_end - arg, NULL,
&converted, &converted_len)
< 0)
# else
/* Convert from UTF-8 to UTF-16/UTF-32. */
converted =
U8_TO_DCHAR (arg, arg_end - arg,
converted, &converted_len);
if (converted == NULL)
# endif
{
int saved_errno = errno;
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = saved_errno;
return NULL;
}
if (converted != result + length)
{
ENSURE_ALLOCATION (xsum (length, converted_len));
DCHAR_CPY (result + length, converted, converted_len);
free (converted);
}
length += converted_len;
}
# endif
if (has_width && width > characters
&& (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
}
break;
case TYPE_U16_STRING:
{
const uint16_t *arg = a.arg[dp->arg_index].a.a_u16_string;
const uint16_t *arg_end;
size_t characters;
if (has_precision)
{
/* Use only PRECISION characters, from the left. */
arg_end = arg;
characters = 0;
for (; precision > 0; precision--)
{
int count = u16_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else if (has_width)
{
/* Use the entire string, and count the number of
characters. */
arg_end = arg;
characters = 0;
for (;;)
{
int count = u16_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else
{
/* Use the entire string. */
arg_end = arg + u16_strlen (arg);
/* The number of characters doesn't matter. */
characters = 0;
}
if (has_width && width > characters
&& !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
# if DCHAR_IS_UINT16_T
{
size_t n = arg_end - arg;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_CPY (result + length, arg, n);
length += n;
}
# else
{ /* Convert. */
DCHAR_T *converted = result + length;
size_t converted_len = allocated - length;
# if DCHAR_IS_TCHAR
/* Convert from UTF-16 to locale encoding. */
if (u16_conv_to_encoding (locale_charset (),
iconveh_question_mark,
arg, arg_end - arg, NULL,
&converted, &converted_len)
< 0)
# else
/* Convert from UTF-16 to UTF-8/UTF-32. */
converted =
U16_TO_DCHAR (arg, arg_end - arg,
converted, &converted_len);
if (converted == NULL)
# endif
{
int saved_errno = errno;
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = saved_errno;
return NULL;
}
if (converted != result + length)
{
ENSURE_ALLOCATION (xsum (length, converted_len));
DCHAR_CPY (result + length, converted, converted_len);
free (converted);
}
length += converted_len;
}
# endif
if (has_width && width > characters
&& (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
}
break;
case TYPE_U32_STRING:
{
const uint32_t *arg = a.arg[dp->arg_index].a.a_u32_string;
const uint32_t *arg_end;
size_t characters;
if (has_precision)
{
/* Use only PRECISION characters, from the left. */
arg_end = arg;
characters = 0;
for (; precision > 0; precision--)
{
int count = u32_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else if (has_width)
{
/* Use the entire string, and count the number of
characters. */
arg_end = arg;
characters = 0;
for (;;)
{
int count = u32_strmblen (arg_end);
if (count == 0)
break;
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EILSEQ;
return NULL;
}
arg_end += count;
characters++;
}
}
else
{
/* Use the entire string. */
arg_end = arg + u32_strlen (arg);
/* The number of characters doesn't matter. */
characters = 0;
}
if (has_width && width > characters
&& !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
# if DCHAR_IS_UINT32_T
{
size_t n = arg_end - arg;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_CPY (result + length, arg, n);
length += n;
}
# else
{ /* Convert. */
DCHAR_T *converted = result + length;
size_t converted_len = allocated - length;
# if DCHAR_IS_TCHAR
/* Convert from UTF-32 to locale encoding. */
if (u32_conv_to_encoding (locale_charset (),
iconveh_question_mark,
arg, arg_end - arg, NULL,
&converted, &converted_len)
< 0)
# else
/* Convert from UTF-32 to UTF-8/UTF-16. */
converted =
U32_TO_DCHAR (arg, arg_end - arg,
converted, &converted_len);
if (converted == NULL)
# endif
{
int saved_errno = errno;
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = saved_errno;
return NULL;
}
if (converted != result + length)
{
ENSURE_ALLOCATION (xsum (length, converted_len));
DCHAR_CPY (result + length, converted, converted_len);
free (converted);
}
length += converted_len;
}
# endif
if (has_width && width > characters
&& (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
DCHAR_SET (result + length, ' ', n);
length += n;
}
}
break;
default:
abort ();
}
}
#endif
#if NEED_PRINTF_DIRECTIVE_A && !defined IN_LIBINTL
else if (dp->conversion == 'a' || dp->conversion == 'A')
{
arg_type type = a.arg[dp->arg_index].type;
int flags = dp->flags;
int has_width;
size_t width;
int has_precision;
size_t precision;
size_t tmp_length;
DCHAR_T tmpbuf[700];
DCHAR_T *tmp;
DCHAR_T *pad_ptr;
DCHAR_T *p;
has_width = 0;
width = 0;
if (dp->width_start != dp->width_end)
{
if (dp->width_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
if (arg < 0)
{
/* "A negative field width is taken as a '-' flag
followed by a positive field width." */
flags |= FLAG_LEFT;
width = (unsigned int) (-arg);
}
else
width = arg;
}
else
{
const FCHAR_T *digitp = dp->width_start;
do
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
has_width = 1;
}
has_precision = 0;
precision = 0;
if (dp->precision_start != dp->precision_end)
{
if (dp->precision_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->precision_arg_index].a.a_int;
/* "A negative precision is taken as if the precision
were omitted." */
if (arg >= 0)
{
precision = arg;
has_precision = 1;
}
}
else
{
const FCHAR_T *digitp = dp->precision_start + 1;
precision = 0;
while (digitp != dp->precision_end)
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
has_precision = 1;
}
}
/* Allocate a temporary buffer of sufficient size. */
if (type == TYPE_LONGDOUBLE)
tmp_length =
(unsigned int) ((LDBL_DIG + 1)
* 0.831 /* decimal -> hexadecimal */
)
+ 1; /* turn floor into ceil */
else
tmp_length =
(unsigned int) ((DBL_DIG + 1)
* 0.831 /* decimal -> hexadecimal */
)
+ 1; /* turn floor into ceil */
if (tmp_length < precision)
tmp_length = precision;
/* Account for sign, decimal point etc. */
tmp_length = xsum (tmp_length, 12);
if (tmp_length < width)
tmp_length = width;
tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T))
tmp = tmpbuf;
else
{
size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T));
if (size_overflow_p (tmp_memsize))
/* Overflow, would lead to out of memory. */
goto out_of_memory;
tmp = (DCHAR_T *) malloc (tmp_memsize);
if (tmp == NULL)
/* Out of memory. */
goto out_of_memory;
}
pad_ptr = NULL;
p = tmp;
if (type == TYPE_LONGDOUBLE)
{
long double arg = a.arg[dp->arg_index].a.a_longdouble;
if (isnanl (arg))
{
if (dp->conversion == 'A')
{
*p++ = 'N'; *p++ = 'A'; *p++ = 'N';
}
else
{
*p++ = 'n'; *p++ = 'a'; *p++ = 'n';
}
}
else
{
int sign = 0;
DECL_LONG_DOUBLE_ROUNDING
BEGIN_LONG_DOUBLE_ROUNDING ();
if (signbit (arg)) /* arg < 0.0L or negative zero */
{
sign = -1;
arg = -arg;
}
if (sign < 0)
*p++ = '-';
else if (flags & FLAG_SHOWSIGN)
*p++ = '+';
else if (flags & FLAG_SPACE)
*p++ = ' ';
if (arg > 0.0L && arg + arg == arg)
{
if (dp->conversion == 'A')
{
*p++ = 'I'; *p++ = 'N'; *p++ = 'F';
}
else
{
*p++ = 'i'; *p++ = 'n'; *p++ = 'f';
}
}
else
{
int exponent;
long double mantissa;
if (arg > 0.0L)
mantissa = printf_frexpl (arg, &exponent);
else
{
exponent = 0;
mantissa = 0.0L;
}
if (has_precision
&& precision < (unsigned int) ((LDBL_DIG + 1) * 0.831) + 1)
{
/* Round the mantissa. */
long double tail = mantissa;
size_t q;
for (q = precision; ; q--)
{
int digit = (int) tail;
tail -= digit;
if (q == 0)
{
if (digit & 1 ? tail >= 0.5L : tail > 0.5L)
tail = 1 - tail;
else
tail = - tail;
break;
}
tail *= 16.0L;
}
if (tail != 0.0L)
for (q = precision; q > 0; q--)
tail *= 0.0625L;
mantissa += tail;
}
*p++ = '0';
*p++ = dp->conversion - 'A' + 'X';
pad_ptr = p;
{
int digit;
digit = (int) mantissa;
mantissa -= digit;
*p++ = '0' + digit;
if ((flags & FLAG_ALT)
|| mantissa > 0.0L || precision > 0)
{
*p++ = decimal_point_char ();
/* This loop terminates because we assume
that FLT_RADIX is a power of 2. */
while (mantissa > 0.0L)
{
mantissa *= 16.0L;
digit = (int) mantissa;
mantissa -= digit;
*p++ = digit
+ (digit < 10
? '0'
: dp->conversion - 10);
if (precision > 0)
precision--;
}
while (precision > 0)
{
*p++ = '0';
precision--;
}
}
}
*p++ = dp->conversion - 'A' + 'P';
# if WIDE_CHAR_VERSION
{
static const wchar_t decimal_format[] =
{ '%', '+', 'd', '\0' };
SNPRINTF (p, 6 + 1, decimal_format, exponent);
}
while (*p != '\0')
p++;
# else
if (sizeof (DCHAR_T) == 1)
{
sprintf ((char *) p, "%+d", exponent);
while (*p != '\0')
p++;
}
else
{
char expbuf[6 + 1];
const char *ep;
sprintf (expbuf, "%+d", exponent);
for (ep = expbuf; (*p = *ep) != '\0'; ep++)
p++;
}
# endif
}
END_LONG_DOUBLE_ROUNDING ();
}
}
else
{
double arg = a.arg[dp->arg_index].a.a_double;
if (isnan (arg))
{
if (dp->conversion == 'A')
{
*p++ = 'N'; *p++ = 'A'; *p++ = 'N';
}
else
{
*p++ = 'n'; *p++ = 'a'; *p++ = 'n';
}
}
else
{
int sign = 0;
if (signbit (arg)) /* arg < 0.0 or negative zero */
{
sign = -1;
arg = -arg;
}
if (sign < 0)
*p++ = '-';
else if (flags & FLAG_SHOWSIGN)
*p++ = '+';
else if (flags & FLAG_SPACE)
*p++ = ' ';
if (arg > 0.0 && arg + arg == arg)
{
if (dp->conversion == 'A')
{
*p++ = 'I'; *p++ = 'N'; *p++ = 'F';
}
else
{
*p++ = 'i'; *p++ = 'n'; *p++ = 'f';
}
}
else
{
int exponent;
double mantissa;
if (arg > 0.0)
mantissa = printf_frexp (arg, &exponent);
else
{
exponent = 0;
mantissa = 0.0;
}
if (has_precision
&& precision < (unsigned int) ((DBL_DIG + 1) * 0.831) + 1)
{
/* Round the mantissa. */
double tail = mantissa;
size_t q;
for (q = precision; ; q--)
{
int digit = (int) tail;
tail -= digit;
if (q == 0)
{
if (digit & 1 ? tail >= 0.5 : tail > 0.5)
tail = 1 - tail;
else
tail = - tail;
break;
}
tail *= 16.0;
}
if (tail != 0.0)
for (q = precision; q > 0; q--)
tail *= 0.0625;
mantissa += tail;
}
*p++ = '0';
*p++ = dp->conversion - 'A' + 'X';
pad_ptr = p;
{
int digit;
digit = (int) mantissa;
mantissa -= digit;
*p++ = '0' + digit;
if ((flags & FLAG_ALT)
|| mantissa > 0.0 || precision > 0)
{
*p++ = decimal_point_char ();
/* This loop terminates because we assume
that FLT_RADIX is a power of 2. */
while (mantissa > 0.0)
{
mantissa *= 16.0;
digit = (int) mantissa;
mantissa -= digit;
*p++ = digit
+ (digit < 10
? '0'
: dp->conversion - 10);
if (precision > 0)
precision--;
}
while (precision > 0)
{
*p++ = '0';
precision--;
}
}
}
*p++ = dp->conversion - 'A' + 'P';
# if WIDE_CHAR_VERSION
{
static const wchar_t decimal_format[] =
{ '%', '+', 'd', '\0' };
SNPRINTF (p, 6 + 1, decimal_format, exponent);
}
while (*p != '\0')
p++;
# else
if (sizeof (DCHAR_T) == 1)
{
sprintf ((char *) p, "%+d", exponent);
while (*p != '\0')
p++;
}
else
{
char expbuf[6 + 1];
const char *ep;
sprintf (expbuf, "%+d", exponent);
for (ep = expbuf; (*p = *ep) != '\0'; ep++)
p++;
}
# endif
}
}
}
/* The generated string now extends from tmp to p, with the
zero padding insertion point being at pad_ptr. */
if (has_width && p - tmp < width)
{
size_t pad = width - (p - tmp);
DCHAR_T *end = p + pad;
if (flags & FLAG_LEFT)
{
/* Pad with spaces on the right. */
for (; pad > 0; pad--)
*p++ = ' ';
}
else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
{
/* Pad with zeroes. */
DCHAR_T *q = end;
while (p > pad_ptr)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = '0';
}
else
{
/* Pad with spaces on the left. */
DCHAR_T *q = end;
while (p > tmp)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = ' ';
}
p = end;
}
{
size_t count = p - tmp;
if (count >= tmp_length)
/* tmp_length was incorrectly calculated - fix the
code above! */
abort ();
/* Make room for the result. */
if (count >= allocated - length)
{
size_t n = xsum (length, count);
ENSURE_ALLOCATION (n);
}
/* Append the result. */
memcpy (result + length, tmp, count * sizeof (DCHAR_T));
if (tmp != tmpbuf)
free (tmp);
length += count;
}
}
#endif
#if (NEED_PRINTF_INFINITE_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
else if ((dp->conversion == 'f' || dp->conversion == 'F'
|| dp->conversion == 'e' || dp->conversion == 'E'
|| dp->conversion == 'g' || dp->conversion == 'G'
|| dp->conversion == 'a' || dp->conversion == 'A')
&& (0
# if NEED_PRINTF_INFINITE_DOUBLE
|| (a.arg[dp->arg_index].type == TYPE_DOUBLE
/* The systems (mingw) which produce wrong output
for Inf, -Inf, and NaN also do so for -0.0.
Therefore we treat this case here as well. */
&& is_infinite_or_zero (a.arg[dp->arg_index].a.a_double))
# endif
# if NEED_PRINTF_LONG_DOUBLE
|| a.arg[dp->arg_index].type == TYPE_LONGDOUBLE
# elif NEED_PRINTF_INFINITE_LONG_DOUBLE
|| (a.arg[dp->arg_index].type == TYPE_LONGDOUBLE
/* Some systems produce wrong output for Inf,
-Inf, and NaN. */
&& is_infinitel (a.arg[dp->arg_index].a.a_longdouble))
# endif
))
{
# if NEED_PRINTF_INFINITE_DOUBLE && (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE)
arg_type type = a.arg[dp->arg_index].type;
# endif
int flags = dp->flags;
int has_width;
size_t width;
int has_precision;
size_t precision;
size_t tmp_length;
DCHAR_T tmpbuf[700];
DCHAR_T *tmp;
DCHAR_T *pad_ptr;
DCHAR_T *p;
has_width = 0;
width = 0;
if (dp->width_start != dp->width_end)
{
if (dp->width_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
if (arg < 0)
{
/* "A negative field width is taken as a '-' flag
followed by a positive field width." */
flags |= FLAG_LEFT;
width = (unsigned int) (-arg);
}
else
width = arg;
}
else
{
const FCHAR_T *digitp = dp->width_start;
do
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
has_width = 1;
}
has_precision = 0;
precision = 0;
if (dp->precision_start != dp->precision_end)
{
if (dp->precision_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->precision_arg_index].a.a_int;
/* "A negative precision is taken as if the precision
were omitted." */
if (arg >= 0)
{
precision = arg;
has_precision = 1;
}
}
else
{
const FCHAR_T *digitp = dp->precision_start + 1;
precision = 0;
while (digitp != dp->precision_end)
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
has_precision = 1;
}
}
/* POSIX specifies the default precision to be 6 for %f, %F,
%e, %E, but not for %g, %G. Implementations appear to use
the same default precision also for %g, %G. */
if (!has_precision)
precision = 6;
/* Allocate a temporary buffer of sufficient size. */
# if NEED_PRINTF_INFINITE_DOUBLE && NEED_PRINTF_LONG_DOUBLE
tmp_length = (type == TYPE_LONGDOUBLE ? LDBL_DIG + 1 : 0);
# elif NEED_PRINTF_LONG_DOUBLE
tmp_length = LDBL_DIG + 1;
# else
tmp_length = 0;
# endif
if (tmp_length < precision)
tmp_length = precision;
# if NEED_PRINTF_LONG_DOUBLE
# if NEED_PRINTF_INFINITE_DOUBLE
if (type == TYPE_LONGDOUBLE)
# endif
if (dp->conversion == 'f' || dp->conversion == 'F')
{
long double arg = a.arg[dp->arg_index].a.a_longdouble;
if (!(isnanl (arg) || arg + arg == arg))
{
/* arg is finite and nonzero. */
int exponent = floorlog10l (arg < 0 ? -arg : arg);
if (exponent >= 0 && tmp_length < exponent + precision)
tmp_length = exponent + precision;
}
}
# endif
/* Account for sign, decimal point etc. */
tmp_length = xsum (tmp_length, 12);
if (tmp_length < width)
tmp_length = width;
tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T))
tmp = tmpbuf;
else
{
size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T));
if (size_overflow_p (tmp_memsize))
/* Overflow, would lead to out of memory. */
goto out_of_memory;
tmp = (DCHAR_T *) malloc (tmp_memsize);
if (tmp == NULL)
/* Out of memory. */
goto out_of_memory;
}
pad_ptr = NULL;
p = tmp;
# if NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE
# if NEED_PRINTF_INFINITE_DOUBLE
if (type == TYPE_LONGDOUBLE)
# endif
{
long double arg = a.arg[dp->arg_index].a.a_longdouble;
if (isnanl (arg))
{
if (dp->conversion >= 'A' && dp->conversion <= 'Z')
{
*p++ = 'N'; *p++ = 'A'; *p++ = 'N';
}
else
{
*p++ = 'n'; *p++ = 'a'; *p++ = 'n';
}
}
else
{
int sign = 0;
DECL_LONG_DOUBLE_ROUNDING
BEGIN_LONG_DOUBLE_ROUNDING ();
if (signbit (arg)) /* arg < 0.0L or negative zero */
{
sign = -1;
arg = -arg;
}
if (sign < 0)
*p++ = '-';
else if (flags & FLAG_SHOWSIGN)
*p++ = '+';
else if (flags & FLAG_SPACE)
*p++ = ' ';
if (arg > 0.0L && arg + arg == arg)
{
if (dp->conversion >= 'A' && dp->conversion <= 'Z')
{
*p++ = 'I'; *p++ = 'N'; *p++ = 'F';
}
else
{
*p++ = 'i'; *p++ = 'n'; *p++ = 'f';
}
}
else
{
# if NEED_PRINTF_LONG_DOUBLE
pad_ptr = p;
if (dp->conversion == 'f' || dp->conversion == 'F')
{
char *digits;
size_t ndigits;
digits =
scale10_round_decimal_long_double (arg, precision);
if (digits == NULL)
{
END_LONG_DOUBLE_ROUNDING ();
goto out_of_memory;
}
ndigits = strlen (digits);
if (ndigits > precision)
do
{
--ndigits;
*p++ = digits[ndigits];
}
while (ndigits > precision);
else
*p++ = '0';
/* Here ndigits <= precision. */
if ((flags & FLAG_ALT) || precision > 0)
{
*p++ = decimal_point_char ();
for (; precision > ndigits; precision--)
*p++ = '0';
while (ndigits > 0)
{
--ndigits;
*p++ = digits[ndigits];
}
}
free (digits);
}
else if (dp->conversion == 'e' || dp->conversion == 'E')
{
int exponent;
if (arg == 0.0L)
{
exponent = 0;
*p++ = '0';
if ((flags & FLAG_ALT) || precision > 0)
{
*p++ = decimal_point_char ();
for (; precision > 0; precision--)
*p++ = '0';
}
}
else
{
/* arg > 0.0L. */
int adjusted;
char *digits;
size_t ndigits;
exponent = floorlog10l (arg);
adjusted = 0;
for (;;)
{
digits =
scale10_round_decimal_long_double (arg,
(int)precision - exponent);
if (digits == NULL)
{
END_LONG_DOUBLE_ROUNDING ();
goto out_of_memory;
}
ndigits = strlen (digits);
if (ndigits == precision + 1)
break;
if (ndigits < precision
|| ndigits > precision + 2)
/* The exponent was not guessed
precisely enough. */
abort ();
if (adjusted)
/* None of two values of exponent is
the right one. Prevent an endless
loop. */
abort ();
free (digits);
if (ndigits == precision)
exponent -= 1;
else
exponent += 1;
adjusted = 1;
}
/* Here ndigits = precision+1. */
*p++ = digits[--ndigits];
if ((flags & FLAG_ALT) || precision > 0)
{
*p++ = decimal_point_char ();
while (ndigits > 0)
{
--ndigits;
*p++ = digits[ndigits];
}
}
free (digits);
}
*p++ = dp->conversion; /* 'e' or 'E' */
# if WIDE_CHAR_VERSION
{
static const wchar_t decimal_format[] =
{ '%', '+', '.', '2', 'd', '\0' };
SNPRINTF (p, 6 + 1, decimal_format, exponent);
}
while (*p != '\0')
p++;
# else
if (sizeof (DCHAR_T) == 1)
{
sprintf ((char *) p, "%+.2d", exponent);
while (*p != '\0')
p++;
}
else
{
char expbuf[6 + 1];
const char *ep;
sprintf (expbuf, "%+.2d", exponent);
for (ep = expbuf; (*p = *ep) != '\0'; ep++)
p++;
}
# endif
}
else if (dp->conversion == 'g' || dp->conversion == 'G')
{
if (precision == 0)
precision = 1;
/* precision >= 1. */
if (arg == 0.0L)
/* The exponent is 0, >= -4, < precision.
Use fixed-point notation. */
{
size_t ndigits = precision;
/* Number of trailing zeroes that have to be
dropped. */
size_t nzeroes =
(flags & FLAG_ALT ? 0 : precision - 1);
--ndigits;
*p++ = '0';
if ((flags & FLAG_ALT) || ndigits > nzeroes)
{
*p++ = decimal_point_char ();
while (ndigits > nzeroes)
{
--ndigits;
*p++ = '0';
}
}
}
else
{
/* arg > 0.0L. */
int exponent;
int adjusted;
char *digits;
size_t ndigits;
size_t nzeroes;
exponent = floorlog10l (arg);
adjusted = 0;
for (;;)
{
digits =
scale10_round_decimal_long_double (arg,
(int)(precision - 1) - exponent);
if (digits == NULL)
{
END_LONG_DOUBLE_ROUNDING ();
goto out_of_memory;
}
ndigits = strlen (digits);
if (ndigits == precision)
break;
if (ndigits < precision - 1
|| ndigits > precision + 1)
/* The exponent was not guessed
precisely enough. */
abort ();
if (adjusted)
/* None of two values of exponent is
the right one. Prevent an endless
loop. */
abort ();
free (digits);
if (ndigits < precision)
exponent -= 1;
else
exponent += 1;
adjusted = 1;
}
/* Here ndigits = precision. */
/* Determine the number of trailing zeroes
that have to be dropped. */
nzeroes = 0;
if ((flags & FLAG_ALT) == 0)
while (nzeroes < ndigits
&& digits[nzeroes] == '0')
nzeroes++;
/* The exponent is now determined. */
if (exponent >= -4
&& exponent < (long)precision)
{
/* Fixed-point notation:
max(exponent,0)+1 digits, then the
decimal point, then the remaining
digits without trailing zeroes. */
if (exponent >= 0)
{
size_t count = exponent + 1;
/* Note: count <= precision = ndigits. */
for (; count > 0; count--)
*p++ = digits[--ndigits];
if ((flags & FLAG_ALT) || ndigits > nzeroes)
{
*p++ = decimal_point_char ();
while (ndigits > nzeroes)
{
--ndigits;
*p++ = digits[ndigits];
}
}
}
else
{
size_t count = -exponent - 1;
*p++ = '0';
*p++ = decimal_point_char ();
for (; count > 0; count--)
*p++ = '0';
while (ndigits > nzeroes)
{
--ndigits;
*p++ = digits[ndigits];
}
}
}
else
{
/* Exponential notation. */
*p++ = digits[--ndigits];
if ((flags & FLAG_ALT) || ndigits > nzeroes)
{
*p++ = decimal_point_char ();
while (ndigits > nzeroes)
{
--ndigits;
*p++ = digits[ndigits];
}
}
*p++ = dp->conversion - 'G' + 'E'; /* 'e' or 'E' */
# if WIDE_CHAR_VERSION
{
static const wchar_t decimal_format[] =
{ '%', '+', '.', '2', 'd', '\0' };
SNPRINTF (p, 6 + 1, decimal_format, exponent);
}
while (*p != '\0')
p++;
# else
if (sizeof (DCHAR_T) == 1)
{
sprintf ((char *) p, "%+.2d", exponent);
while (*p != '\0')
p++;
}
else
{
char expbuf[6 + 1];
const char *ep;
sprintf (expbuf, "%+.2d", exponent);
for (ep = expbuf; (*p = *ep) != '\0'; ep++)
p++;
}
# endif
}
free (digits);
}
}
else
abort ();
# else
/* arg is finite. */
abort ();
# endif
}
END_LONG_DOUBLE_ROUNDING ();
}
}
# if NEED_PRINTF_INFINITE_DOUBLE
else
# endif
# endif
# if NEED_PRINTF_INFINITE_DOUBLE
{
/* Simpler than above: handle only NaN, Infinity, zero. */
double arg = a.arg[dp->arg_index].a.a_double;
if (isnan (arg))
{
if (dp->conversion >= 'A' && dp->conversion <= 'Z')
{
*p++ = 'N'; *p++ = 'A'; *p++ = 'N';
}
else
{
*p++ = 'n'; *p++ = 'a'; *p++ = 'n';
}
}
else
{
int sign = 0;
if (signbit (arg)) /* arg < 0.0L or negative zero */
{
sign = -1;
arg = -arg;
}
if (sign < 0)
*p++ = '-';
else if (flags & FLAG_SHOWSIGN)
*p++ = '+';
else if (flags & FLAG_SPACE)
*p++ = ' ';
if (arg > 0.0 && arg + arg == arg)
{
if (dp->conversion >= 'A' && dp->conversion <= 'Z')
{
*p++ = 'I'; *p++ = 'N'; *p++ = 'F';
}
else
{
*p++ = 'i'; *p++ = 'n'; *p++ = 'f';
}
}
else
{
if (!(arg == 0.0))
abort ();
pad_ptr = p;
if (dp->conversion == 'f' || dp->conversion == 'F')
{
*p++ = '0';
if ((flags & FLAG_ALT) || precision > 0)
{
*p++ = decimal_point_char ();
for (; precision > 0; precision--)
*p++ = '0';
}
}
else if (dp->conversion == 'e' || dp->conversion == 'E')
{
*p++ = '0';
if ((flags & FLAG_ALT) || precision > 0)
{
*p++ = decimal_point_char ();
for (; precision > 0; precision--)
*p++ = '0';
}
*p++ = dp->conversion; /* 'e' or 'E' */
*p++ = '+';
/* Produce the same number of exponent digits as
the native printf implementation. */
# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
*p++ = '0';
# endif
*p++ = '0';
*p++ = '0';
}
else if (dp->conversion == 'g' || dp->conversion == 'G')
{
*p++ = '0';
if (flags & FLAG_ALT)
{
size_t ndigits =
(precision > 0 ? precision - 1 : 0);
*p++ = decimal_point_char ();
for (; ndigits > 0; --ndigits)
*p++ = '0';
}
}
else
abort ();
}
}
}
# endif
/* The generated string now extends from tmp to p, with the
zero padding insertion point being at pad_ptr. */
if (has_width && p - tmp < width)
{
size_t pad = width - (p - tmp);
DCHAR_T *end = p + pad;
if (flags & FLAG_LEFT)
{
/* Pad with spaces on the right. */
for (; pad > 0; pad--)
*p++ = ' ';
}
else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
{
/* Pad with zeroes. */
DCHAR_T *q = end;
while (p > pad_ptr)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = '0';
}
else
{
/* Pad with spaces on the left. */
DCHAR_T *q = end;
while (p > tmp)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = ' ';
}
p = end;
}
{
size_t count = p - tmp;
if (count >= tmp_length)
/* tmp_length was incorrectly calculated - fix the
code above! */
abort ();
/* Make room for the result. */
if (count >= allocated - length)
{
size_t n = xsum (length, count);
ENSURE_ALLOCATION (n);
}
/* Append the result. */
memcpy (result + length, tmp, count * sizeof (DCHAR_T));
if (tmp != tmpbuf)
free (tmp);
length += count;
}
}
#endif
else
{
arg_type type = a.arg[dp->arg_index].type;
int flags = dp->flags;
#if !USE_SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO
int has_width;
size_t width;
#endif
#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO
int pad_ourselves;
#else
# define pad_ourselves 0
#endif
TCHAR_T *fbp;
unsigned int prefix_count;
int prefixes[2];
#if !USE_SNPRINTF
size_t tmp_length;
TCHAR_T tmpbuf[700];
TCHAR_T *tmp;
#endif
#if !USE_SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO
has_width = 0;
width = 0;
if (dp->width_start != dp->width_end)
{
if (dp->width_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
if (arg < 0)
{
/* "A negative field width is taken as a '-' flag
followed by a positive field width." */
flags |= FLAG_LEFT;
width = (unsigned int) (-arg);
}
else
width = arg;
}
else
{
const FCHAR_T *digitp = dp->width_start;
do
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
has_width = 1;
}
#endif
#if !USE_SNPRINTF
/* Allocate a temporary buffer of sufficient size for calling
sprintf. */
{
size_t precision;
precision = 6;
if (dp->precision_start != dp->precision_end)
{
if (dp->precision_arg_index != ARG_NONE)
{
int arg;
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->precision_arg_index].a.a_int;
precision = (arg < 0 ? 0 : arg);
}
else
{
const FCHAR_T *digitp = dp->precision_start + 1;
precision = 0;
while (digitp != dp->precision_end)
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
}
}
switch (dp->conversion)
{
case 'd': case 'i': case 'u':
# if HAVE_LONG_LONG_INT
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
* 0.30103 /* binary -> decimal */
)
+ 1; /* turn floor into ceil */
else
# endif
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
* 0.30103 /* binary -> decimal */
)
+ 1; /* turn floor into ceil */
else
tmp_length =
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
* 0.30103 /* binary -> decimal */
)
+ 1; /* turn floor into ceil */
if (tmp_length < precision)
tmp_length = precision;
/* Multiply by 2, as an estimate for FLAG_GROUP. */
tmp_length = xsum (tmp_length, tmp_length);
/* Add 1, to account for a leading sign. */
tmp_length = xsum (tmp_length, 1);
break;
case 'o':
# if HAVE_LONG_LONG_INT
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
* 0.333334 /* binary -> octal */
)
+ 1; /* turn floor into ceil */
else
# endif
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
* 0.333334 /* binary -> octal */
)
+ 1; /* turn floor into ceil */
else
tmp_length =
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
* 0.333334 /* binary -> octal */
)
+ 1; /* turn floor into ceil */
if (tmp_length < precision)
tmp_length = precision;
/* Add 1, to account for a leading sign. */
tmp_length = xsum (tmp_length, 1);
break;
case 'x': case 'X':
# if HAVE_LONG_LONG_INT
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
* 0.25 /* binary -> hexadecimal */
)
+ 1; /* turn floor into ceil */
else
# endif
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
tmp_length =
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
* 0.25 /* binary -> hexadecimal */
)
+ 1; /* turn floor into ceil */
else
tmp_length =
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
* 0.25 /* binary -> hexadecimal */
)
+ 1; /* turn floor into ceil */
if (tmp_length < precision)
tmp_length = precision;
/* Add 2, to account for a leading sign or alternate form. */
tmp_length = xsum (tmp_length, 2);
break;
case 'f': case 'F':
if (type == TYPE_LONGDOUBLE)
tmp_length =
(unsigned int) (LDBL_MAX_EXP
* 0.30103 /* binary -> decimal */
* 2 /* estimate for FLAG_GROUP */
)
+ 1 /* turn floor into ceil */
+ 10; /* sign, decimal point etc. */
else
tmp_length =
(unsigned int) (DBL_MAX_EXP
* 0.30103 /* binary -> decimal */
* 2 /* estimate for FLAG_GROUP */
)
+ 1 /* turn floor into ceil */
+ 10; /* sign, decimal point etc. */
tmp_length = xsum (tmp_length, precision);
break;
case 'e': case 'E': case 'g': case 'G':
tmp_length =
12; /* sign, decimal point, exponent etc. */
tmp_length = xsum (tmp_length, precision);
break;
case 'a': case 'A':
if (type == TYPE_LONGDOUBLE)
tmp_length =
(unsigned int) (LDBL_DIG
* 0.831 /* decimal -> hexadecimal */
)
+ 1; /* turn floor into ceil */
else
tmp_length =
(unsigned int) (DBL_DIG
* 0.831 /* decimal -> hexadecimal */
)
+ 1; /* turn floor into ceil */
if (tmp_length < precision)
tmp_length = precision;
/* Account for sign, decimal point etc. */
tmp_length = xsum (tmp_length, 12);
break;
case 'c':
# if HAVE_WINT_T && !WIDE_CHAR_VERSION
if (type == TYPE_WIDE_CHAR)
tmp_length = MB_CUR_MAX;
else
# endif
tmp_length = 1;
break;
case 's':
# if HAVE_WCHAR_T
if (type == TYPE_WIDE_STRING)
{
tmp_length =
local_wcslen (a.arg[dp->arg_index].a.a_wide_string);
# if !WIDE_CHAR_VERSION
tmp_length = xtimes (tmp_length, MB_CUR_MAX);
# endif
}
else
# endif
tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
break;
case 'p':
tmp_length =
(unsigned int) (sizeof (void *) * CHAR_BIT
* 0.25 /* binary -> hexadecimal */
)
+ 1 /* turn floor into ceil */
+ 2; /* account for leading 0x */
break;
default:
abort ();
}
# if ENABLE_UNISTDIO
/* Padding considers the number of characters, therefore the
number of elements after padding may be
> max (tmp_length, width)
but is certainly
<= tmp_length + width. */
tmp_length = xsum (tmp_length, width);
# else
/* Padding considers the number of elements, says POSIX. */
if (tmp_length < width)
tmp_length = width;
# endif
tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
}
if (tmp_length <= sizeof (tmpbuf) / sizeof (TCHAR_T))
tmp = tmpbuf;
else
{
size_t tmp_memsize = xtimes (tmp_length, sizeof (TCHAR_T));
if (size_overflow_p (tmp_memsize))
/* Overflow, would lead to out of memory. */
goto out_of_memory;
tmp = (TCHAR_T *) malloc (tmp_memsize);
if (tmp == NULL)
/* Out of memory. */
goto out_of_memory;
}
#endif
/* Decide whether to perform the padding ourselves. */
#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO
switch (dp->conversion)
{
# if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO
/* If we need conversion from TCHAR_T[] to DCHAR_T[], we need
to perform the padding after this conversion. Functions
with unistdio extensions perform the padding based on
character count rather than element count. */
case 'c': case 's':
# endif
# if NEED_PRINTF_FLAG_ZERO
case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
case 'a': case 'A':
# endif
pad_ourselves = 1;
break;
default:
pad_ourselves = 0;
break;
}
#endif
/* Construct the format string for calling snprintf or
sprintf. */
fbp = buf;
*fbp++ = '%';
#if NEED_PRINTF_FLAG_GROUPING
/* The underlying implementation doesn't support the ' flag.
Produce no grouping characters in this case; this is
acceptable because the grouping is locale dependent. */
#else
if (flags & FLAG_GROUP)
*fbp++ = '\'';
#endif
if (flags & FLAG_LEFT)
*fbp++ = '-';
if (flags & FLAG_SHOWSIGN)
*fbp++ = '+';
if (flags & FLAG_SPACE)
*fbp++ = ' ';
if (flags & FLAG_ALT)
*fbp++ = '#';
if (!pad_ourselves)
{
if (flags & FLAG_ZERO)
*fbp++ = '0';
if (dp->width_start != dp->width_end)
{
size_t n = dp->width_end - dp->width_start;
/* The width specification is known to consist only
of standard ASCII characters. */
if (sizeof (FCHAR_T) == sizeof (TCHAR_T))
{
memcpy (fbp, dp->width_start, n * sizeof (TCHAR_T));
fbp += n;
}
else
{
const FCHAR_T *mp = dp->width_start;
do
*fbp++ = (unsigned char) *mp++;
while (--n > 0);
}
}
}
if (dp->precision_start != dp->precision_end)
{
size_t n = dp->precision_end - dp->precision_start;
/* The precision specification is known to consist only
of standard ASCII characters. */
if (sizeof (FCHAR_T) == sizeof (TCHAR_T))
{
memcpy (fbp, dp->precision_start, n * sizeof (TCHAR_T));
fbp += n;
}
else
{
const FCHAR_T *mp = dp->precision_start;
do
*fbp++ = (unsigned char) *mp++;
while (--n > 0);
}
}
switch (type)
{
#if HAVE_LONG_LONG_INT
case TYPE_LONGLONGINT:
case TYPE_ULONGLONGINT:
# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
*fbp++ = 'I';
*fbp++ = '6';
*fbp++ = '4';
break;
# else
*fbp++ = 'l';
/*FALLTHROUGH*/
# endif
#endif
case TYPE_LONGINT:
case TYPE_ULONGINT:
#if HAVE_WINT_T
case TYPE_WIDE_CHAR:
#endif
#if HAVE_WCHAR_T
case TYPE_WIDE_STRING:
#endif
*fbp++ = 'l';
break;
case TYPE_LONGDOUBLE:
*fbp++ = 'L';
break;
default:
break;
}
#if NEED_PRINTF_DIRECTIVE_F
if (dp->conversion == 'F')
*fbp = 'f';
else
#endif
*fbp = dp->conversion;
#if USE_SNPRINTF
fbp[1] = '%';
fbp[2] = 'n';
fbp[3] = '\0';
#else
fbp[1] = '\0';
#endif
/* Construct the arguments for calling snprintf or sprintf. */
prefix_count = 0;
if (!pad_ourselves && dp->width_arg_index != ARG_NONE)
{
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
}
if (dp->precision_arg_index != ARG_NONE)
{
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
abort ();
prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
}
#if USE_SNPRINTF
/* The SNPRINTF result is appended after result[0..length].
The latter is an array of DCHAR_T; SNPRINTF appends an
array of TCHAR_T to it. This is possible because
sizeof (TCHAR_T) divides sizeof (DCHAR_T) and
alignof (TCHAR_T) <= alignof (DCHAR_T). */
# define TCHARS_PER_DCHAR (sizeof (DCHAR_T) / sizeof (TCHAR_T))
/* Prepare checking whether snprintf returns the count
via %n. */
ENSURE_ALLOCATION (xsum (length, 1));
*(TCHAR_T *) (result + length) = '\0';
#endif
for (;;)
{
int count = -1;
#if USE_SNPRINTF
int retcount = 0;
size_t maxlen = allocated - length;
/* SNPRINTF can fail if its second argument is
> INT_MAX. */
if (maxlen > INT_MAX / TCHARS_PER_DCHAR)
goto overflow;
maxlen = maxlen * TCHARS_PER_DCHAR;
# define SNPRINTF_BUF(arg) \
switch (prefix_count) \
{ \
case 0: \
retcount = SNPRINTF ((TCHAR_T *) (result + length), \
maxlen, buf, \
arg, &count); \
break; \
case 1: \
retcount = SNPRINTF ((TCHAR_T *) (result + length), \
maxlen, buf, \
prefixes[0], arg, &count); \
break; \
case 2: \
retcount = SNPRINTF ((TCHAR_T *) (result + length), \
maxlen, buf, \
prefixes[0], prefixes[1], arg, \
&count); \
break; \
default: \
abort (); \
}
#else
# define SNPRINTF_BUF(arg) \
switch (prefix_count) \
{ \
case 0: \
count = sprintf (tmp, buf, arg); \
break; \
case 1: \
count = sprintf (tmp, buf, prefixes[0], arg); \
break; \
case 2: \
count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
arg); \
break; \
default: \
abort (); \
}
#endif
switch (type)
{
case TYPE_SCHAR:
{
int arg = a.arg[dp->arg_index].a.a_schar;
SNPRINTF_BUF (arg);
}
break;
case TYPE_UCHAR:
{
unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
SNPRINTF_BUF (arg);
}
break;
case TYPE_SHORT:
{
int arg = a.arg[dp->arg_index].a.a_short;
SNPRINTF_BUF (arg);
}
break;
case TYPE_USHORT:
{
unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
SNPRINTF_BUF (arg);
}
break;
case TYPE_INT:
{
int arg = a.arg[dp->arg_index].a.a_int;
SNPRINTF_BUF (arg);
}
break;
case TYPE_UINT:
{
unsigned int arg = a.arg[dp->arg_index].a.a_uint;
SNPRINTF_BUF (arg);
}
break;
case TYPE_LONGINT:
{
long int arg = a.arg[dp->arg_index].a.a_longint;
SNPRINTF_BUF (arg);
}
break;
case TYPE_ULONGINT:
{
unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
SNPRINTF_BUF (arg);
}
break;
#if HAVE_LONG_LONG_INT
case TYPE_LONGLONGINT:
{
long long int arg = a.arg[dp->arg_index].a.a_longlongint;
SNPRINTF_BUF (arg);
}
break;
case TYPE_ULONGLONGINT:
{
unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
SNPRINTF_BUF (arg);
}
break;
#endif
case TYPE_DOUBLE:
{
double arg = a.arg[dp->arg_index].a.a_double;
SNPRINTF_BUF (arg);
}
break;
case TYPE_LONGDOUBLE:
{
long double arg = a.arg[dp->arg_index].a.a_longdouble;
SNPRINTF_BUF (arg);
}
break;
case TYPE_CHAR:
{
int arg = a.arg[dp->arg_index].a.a_char;
SNPRINTF_BUF (arg);
}
break;
#if HAVE_WINT_T
case TYPE_WIDE_CHAR:
{
wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
SNPRINTF_BUF (arg);
}
break;
#endif
case TYPE_STRING:
{
const char *arg = a.arg[dp->arg_index].a.a_string;
SNPRINTF_BUF (arg);
}
break;
#if HAVE_WCHAR_T
case TYPE_WIDE_STRING:
{
const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
SNPRINTF_BUF (arg);
}
break;
#endif
case TYPE_POINTER:
{
void *arg = a.arg[dp->arg_index].a.a_pointer;
SNPRINTF_BUF (arg);
}
break;
default:
abort ();
}
#if USE_SNPRINTF
/* Portability: Not all implementations of snprintf()
are ISO C 99 compliant. Determine the number of
bytes that snprintf() has produced or would have
produced. */
if (count >= 0)
{
/* Verify that snprintf() has NUL-terminated its
result. */
if (count < (int)maxlen
&& ((TCHAR_T *) (result + length)) [count] != '\0')
abort ();
/* Portability hack. */
if (retcount > count)
count = retcount;
}
else
{
/* snprintf() doesn't understand the '%n'
directive. */
if (fbp[1] != '\0')
{
/* Don't use the '%n' directive; instead, look
at the snprintf() return value. */
fbp[1] = '\0';
continue;
}
else
{
/* Look at the snprintf() return value. */
if (retcount < 0)
{
/* HP-UX 10.20 snprintf() is doubly deficient:
It doesn't understand the '%n' directive,
*and* it returns -1 (rather than the length
that would have been required) when the
buffer is too small. */
size_t bigger_need =
xsum (xtimes (allocated, 2), 12);
ENSURE_ALLOCATION (bigger_need);
continue;
}
else
count = retcount;
}
}
#endif
/* Attempt to handle failure. */
if (count < 0)
{
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EINVAL;
return NULL;
}
#if USE_SNPRINTF
/* Handle overflow of the allocated buffer. */
if (count >= (int)maxlen)
{
/* Need at least count * sizeof (TCHAR_T) bytes. But
allocate proportionally, to avoid looping eternally
if snprintf() reports a too small count. */
size_t n =
xmax (xsum (length,
(count + TCHARS_PER_DCHAR - 1)
/ TCHARS_PER_DCHAR),
xtimes (allocated, 2));
ENSURE_ALLOCATION (n);
continue;
}
#endif
#if !DCHAR_IS_TCHAR
# if !USE_SNPRINTF
if (count >= tmp_length)
/* tmp_length was incorrectly calculated - fix the
code above! */
abort ();
# endif
/* Convert from TCHAR_T[] to DCHAR_T[]. */
if (dp->conversion == 'c' || dp->conversion == 's')
{
/* type = TYPE_CHAR or TYPE_WIDE_CHAR or TYPE_STRING
TYPE_WIDE_STRING.
The result string is not certainly ASCII. */
const TCHAR_T *tmpsrc;
DCHAR_T *tmpdst;
size_t tmpdst_len;
/* This code assumes that TCHAR_T is 'char'. */
typedef int TCHAR_T_verify
[2 * (sizeof (TCHAR_T) == 1) - 1];
# if USE_SNPRINTF
tmpsrc = (TCHAR_T *) (result + length);
# else
tmpsrc = tmp;
# endif
tmpdst = NULL;
tmpdst_len = 0;
if (DCHAR_CONV_FROM_ENCODING (locale_charset (),
iconveh_question_mark,
tmpsrc, count,
NULL,
&tmpdst, &tmpdst_len)
< 0)
{
int saved_errno = errno;
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = saved_errno;
return NULL;
}
ENSURE_ALLOCATION (xsum (length, tmpdst_len));
DCHAR_CPY (result + length, tmpdst, tmpdst_len);
free (tmpdst);
count = tmpdst_len;
}
else
{
/* The result string is ASCII.
Simple 1:1 conversion. */
# if USE_SNPRINTF
/* If sizeof (DCHAR_T) == sizeof (TCHAR_T), it's a
no-op conversion, in-place on the array starting
at (result + length). */
if (sizeof (DCHAR_T) != sizeof (TCHAR_T))
# endif
{
const TCHAR_T *tmpsrc;
DCHAR_T *tmpdst;
size_t n;
# if USE_SNPRINTF
if (result == resultbuf)
{
tmpsrc = (TCHAR_T *) (result + length);
/* ENSURE_ALLOCATION will not move tmpsrc
(because it's part of resultbuf). */
ENSURE_ALLOCATION (xsum (length, count));
}
else
{
/* ENSURE_ALLOCATION will move the array
(because it uses realloc(). */
ENSURE_ALLOCATION (xsum (length, count));
tmpsrc = (TCHAR_T *) (result + length);
}
# else
tmpsrc = tmp;
ENSURE_ALLOCATION (xsum (length, count));
# endif
tmpdst = result + length;
/* Copy backwards, because of overlapping. */
tmpsrc += count;
tmpdst += count;
for (n = count; n > 0; n--)
*--tmpdst = (unsigned char) *--tmpsrc;
}
}
#endif
#if DCHAR_IS_TCHAR && !USE_SNPRINTF
/* Make room for the result. */
if (count > allocated - length)
{
/* Need at least count elements. But allocate
proportionally. */
size_t n =
xmax (xsum (length, count), xtimes (allocated, 2));
ENSURE_ALLOCATION (n);
}
#endif
/* Here count <= allocated - length. */
/* Perform padding. */
#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO
if (pad_ourselves && has_width)
{
size_t w;
# if ENABLE_UNISTDIO
/* Outside POSIX, it's preferrable to compare the width
against the number of _characters_ of the converted
value. */
w = DCHAR_MBSNLEN (result + length, count);
# else
/* The width is compared against the number of _bytes_
of the converted value, says POSIX. */
w = count;
# endif
if (w < width)
{
size_t pad = width - w;
# if USE_SNPRINTF
/* Make room for the result. */
if (xsum (count, pad) > allocated - length)
{
/* Need at least count + pad elements. But
allocate proportionally. */
size_t n =
xmax (xsum3 (length, count, pad),
xtimes (allocated, 2));
length += count;
ENSURE_ALLOCATION (n);
length -= count;
}
/* Here count + pad <= allocated - length. */
# endif
{
# if !DCHAR_IS_TCHAR || USE_SNPRINTF
DCHAR_T * const rp = result + length;
# else
DCHAR_T * const rp = tmp;
# endif
DCHAR_T *p = rp + count;
DCHAR_T *end = p + pad;
# if NEED_PRINTF_FLAG_ZERO
DCHAR_T *pad_ptr;
# if !DCHAR_IS_TCHAR
if (dp->conversion == 'c'
|| dp->conversion == 's')
/* No zero-padding for string directives. */
pad_ptr = NULL;
else
# endif
{
pad_ptr = (*rp == '-' ? rp + 1 : rp);
/* No zero-padding of "inf" and "nan". */
if ((*pad_ptr >= 'A' && *pad_ptr <= 'Z')
|| (*pad_ptr >= 'a' && *pad_ptr <= 'z'))
pad_ptr = NULL;
}
# endif
/* The generated string now extends from rp to p,
with the zero padding insertion point being at
pad_ptr. */
count = count + pad; /* = end - rp */
if (flags & FLAG_LEFT)
{
/* Pad with spaces on the right. */
for (; pad > 0; pad--)
*p++ = ' ';
}
# if NEED_PRINTF_FLAG_ZERO
else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
{
/* Pad with zeroes. */
DCHAR_T *q = end;
while (p > pad_ptr)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = '0';
}
# endif
else
{
/* Pad with spaces on the left. */
DCHAR_T *q = end;
while (p > rp)
*--q = *--p;
for (; pad > 0; pad--)
*p++ = ' ';
}
}
}
}
#endif
#if DCHAR_IS_TCHAR && !USE_SNPRINTF
if (count >= tmp_length)
/* tmp_length was incorrectly calculated - fix the
code above! */
abort ();
#endif
/* Here still count <= allocated - length. */
#if !DCHAR_IS_TCHAR || USE_SNPRINTF
/* The snprintf() result did fit. */
#else
/* Append the sprintf() result. */
memcpy (result + length, tmp, count * sizeof (DCHAR_T));
#endif
#if !USE_SNPRINTF
if (tmp != tmpbuf)
free (tmp);
#endif
#if NEED_PRINTF_DIRECTIVE_F
if (dp->conversion == 'F')
{
/* Convert the %f result to upper case for %F. */
DCHAR_T *rp = result + length;
size_t rc;
for (rc = count; rc > 0; rc--, rp++)
if (*rp >= 'a' && *rp <= 'z')
*rp = *rp - 'a' + 'A';
}
#endif
length += count;
break;
}
}
}
}
/* Add the final NUL. */
ENSURE_ALLOCATION (xsum (length, 1));
result[length] = '\0';
if (result != resultbuf && length + 1 < allocated)
{
/* Shrink the allocated memory if possible. */
DCHAR_T *memory;
memory = (DCHAR_T *) realloc (result, (length + 1) * sizeof (DCHAR_T));
if (memory != NULL)
result = memory;
}
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
*lengthp = length;
/* Note that we can produce a big string of a length > INT_MAX. POSIX
says that snprintf() fails with errno = EOVERFLOW in this case, but
that's only because snprintf() returns an 'int'. This function does
not have this limitation. */
return result;
overflow:
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
errno = EOVERFLOW;
return NULL;
out_of_memory:
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
out_of_memory_1:
CLEANUP ();
errno = ENOMEM;
return NULL;
}
}
#undef TCHARS_PER_DCHAR
#undef SNPRINTF
#undef USE_SNPRINTF
#undef PRINTF_PARSE
#undef DIRECTIVES
#undef DIRECTIVE
#undef TCHAR_T
#undef DCHAR_T
#undef FCHAR_T
#undef VASNPRINTF
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