-/* -*- buffer-read-only: t -*- vi: set ro: */
-/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
/* vsprintf with automatic memory allocation.
- Copyright (C) 1999, 2002-2010 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2002-2018 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ with this program; if not, see <https://www.gnu.org/licenses/>. */
/* This file can be parametrized with the following macros:
VASNPRINTF The name of the function being defined.
/* Checked size_t computations. */
#include "xsize.h"
+#include "verify.h"
+
#if (NEED_PRINTF_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
# include <math.h>
# include "float+.h"
# include "fpucw.h"
#endif
+#ifndef FALLTHROUGH
+# if __GNUC__ < 7
+# define FALLTHROUGH ((void) 0)
+# else
+# define FALLTHROUGH __attribute__ ((__fallthrough__))
+# endif
+#endif
+
/* Default parameters. */
#ifndef VASNPRINTF
# if WIDE_CHAR_VERSION
# 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
+ on Unix; we use the function _snwprintf() or - on mingw - snwprintf()
+ instead. The mingw function snwprintf() has fewer bugs than the
+ MSVCRT function _snwprintf(), so prefer that. */
+# if defined __MINGW32__
+# define SNPRINTF snwprintf
+# else
+# define SNPRINTF _snwprintf
+# define USE_MSVC__SNPRINTF 1
+# endif
# else
/* Unix. */
# define SNPRINTF swprintf
# define USE_SNPRINTF 0
# endif
# if HAVE_DECL__SNPRINTF
- /* Windows. */
-# define SNPRINTF _snprintf
+ /* Windows. The mingw function snprintf() has fewer bugs than the MSVCRT
+ function _snprintf(), so prefer that. */
+# if defined __MINGW32__
+# define SNPRINTF snprintf
+ /* Here we need to call the native snprintf, not rpl_snprintf. */
+# undef snprintf
+# else
+ /* MSVC versions < 14 did not have snprintf, only _snprintf. */
+# define SNPRINTF _snprintf
+# define USE_MSVC__SNPRINTF 1
+# endif
# else
/* Unix. */
# define SNPRINTF snprintf
/* GCC >= 4.0 with -Wall emits unjustified "... may be used uninitialized"
warnings in this file. Use -Dlint to suppress them. */
-#ifdef lint
+#if defined GCC_LINT || defined lint
# define IF_LINT(Code) Code
#else
# define IF_LINT(Code) /* empty */
#undef remainder
#define remainder rem
-#if !USE_SNPRINTF && !WIDE_CHAR_VERSION
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && !WIDE_CHAR_VERSION
# if (HAVE_STRNLEN && !defined _AIX)
# define local_strnlen strnlen
# else
# endif
#endif
-#if (!USE_SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && HAVE_WCHAR_T && (WIDE_CHAR_VERSION || DCHAR_IS_TCHAR)
+#if (((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && WIDE_CHAR_VERSION) || ((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && !WIDE_CHAR_VERSION && DCHAR_IS_TCHAR)) && HAVE_WCHAR_T
# if HAVE_WCSLEN
# define local_wcslen wcslen
# else
# endif
#endif
-#if !USE_SNPRINTF && HAVE_WCHAR_T && WIDE_CHAR_VERSION
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF) && HAVE_WCHAR_T && WIDE_CHAR_VERSION
# if HAVE_WCSNLEN
# define local_wcsnlen wcsnlen
# else
{
const char *point;
/* Determine it in a multithread-safe way. We know nl_langinfo is
- multithread-safe on glibc systems and MacOS X systems, but is not required
+ multithread-safe on glibc systems and Mac OS X 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__ || (defined __APPLE__ && defined __MACH__))
+# if HAVE_NL_LANGINFO && (__GLIBC__ || defined __UCLIBC__ || (defined __APPLE__ && defined __MACH__))
point = nl_langinfo (RADIXCHAR);
# elif 1
char pointbuf[5];
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];
+verify (sizeof (mp_limb_t) * CHAR_BIT == GMP_LIMB_BITS);
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];
+verify (sizeof (mp_twolimb_t) * CHAR_BIT == GMP_TWOLIMB_BITS);
/* Representation of a bignum >= 0. */
typedef struct
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)
+ /* Determine s = GMP_LIMB_BITS - integer_length (msd).
+ Code copied from gnulib's integer_length.c. */
+# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
+ s = __builtin_clz (msd);
+# else
+# if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
+ if (GMP_LIMB_BITS <= DBL_MANT_BIT)
{
- msd = msd >> 2;
- s -= 2;
+ /* Use 'double' operations.
+ Assumes an IEEE 754 'double' implementation. */
+# define DBL_EXP_MASK ((DBL_MAX_EXP - DBL_MIN_EXP) | 7)
+# define DBL_EXP_BIAS (DBL_EXP_MASK / 2 - 1)
+# define NWORDS \
+ ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+ union { double value; unsigned int word[NWORDS]; } m;
+
+ /* Use a single integer to floating-point conversion. */
+ m.value = msd;
+
+ s = GMP_LIMB_BITS
+ - (((m.word[DBL_EXPBIT0_WORD] >> DBL_EXPBIT0_BIT) & DBL_EXP_MASK)
+ - DBL_EXP_BIAS);
}
- if (msd >= 0x2)
+ else
+# undef NWORDS
+# endif
{
- msd = msd >> 1;
- s -= 1;
+ 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;
+ }
}
+# endif
}
/* 0 <= s < GMP_LIMB_BITS.
Copy b, shifting it left by s bits. */
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));
+ /* We need extra_zeroes bytes for zeroes, followed by c_len bytes for the
+ digits of a, followed by 1 byte for the terminating NUL. */
+ char *c_ptr = (char *) malloc (xsum (xsum (extra_zeroes, c_len), 1));
if (c_ptr != NULL)
{
char *d_ptr = c_ptr;
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
+ /* x = 2^exp * y = 2^(exp - LDBL_MANT_BIT) * (y * 2^LDBL_MANT_BIT), and the
latter is an integer. */
- /* Convert the mantissa (y * LDBL_MANT_BIT) to a sequence of limbs.
+ /* Convert the mantissa (y * 2^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',
abort ();
m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo;
}
-#if 0 /* On FreeBSD 6.1/x86, 'long double' numbers sometimes have excess
- precision. */
+# if 0 /* On FreeBSD 6.1/x86, 'long double' numbers sometimes have excess
+ precision. */
if (!(y == 0.0L))
abort ();
-#endif
+# endif
/* Normalise. */
while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0)
m.nlimbs--;
y = frexp (x, &exp);
if (!(y >= 0.0 && y < 1.0))
abort ();
- /* x = 2^exp * y = 2^(exp - DBL_MANT_BIT) * (y * DBL_MANT_BIT), and the
+ /* x = 2^exp * y = 2^(exp - DBL_MANT_BIT) * (y * 2^DBL_MANT_BIT), and the
latter is an integer. */
- /* Convert the mantissa (y * DBL_MANT_BIT) to a sequence of limbs.
+ /* Convert the mantissa (y * 2^DBL_MANT_BIT) to a sequence of limbs.
I'm not sure whether it's safe to cast a 'double' value between
2^31 and 2^32 to 'unsigned int', therefore play safe and cast only
'double' values between 0 and 2^16 (to 'unsigned int' or 'int',
#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF
+
+/* Use a different function name, to make it possible that the 'wchar_t'
+ parametrization and the 'char' parametrization get compiled in the same
+ translation unit. */
+# if WIDE_CHAR_VERSION
+# define MAX_ROOM_NEEDED wmax_room_needed
+# else
+# define MAX_ROOM_NEEDED max_room_needed
+# endif
+
+/* Returns the number of TCHAR_T units needed as temporary space for the result
+ of sprintf or SNPRINTF of a single conversion directive. */
+static size_t
+MAX_ROOM_NEEDED (const arguments *ap, size_t arg_index, FCHAR_T conversion,
+ arg_type type, int flags, size_t width, int has_precision,
+ size_t precision, int pad_ourselves)
+{
+ size_t tmp_length;
+
+ switch (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)
+ {
+# if WIDE_CHAR_VERSION
+ /* ISO C says about %ls in fwprintf:
+ "If the precision is not specified or is greater than the size
+ of the array, the array shall contain a null wide character."
+ So if there is a precision, we must not use wcslen. */
+ const wchar_t *arg = ap->arg[arg_index].a.a_wide_string;
+
+ if (has_precision)
+ tmp_length = local_wcsnlen (arg, precision);
+ else
+ tmp_length = local_wcslen (arg);
+# else
+ /* ISO C says about %ls in fprintf:
+ "If a precision is specified, no more than that many bytes are
+ written (including shift sequences, if any), and the array
+ shall contain a null wide character if, to equal the multibyte
+ character sequence length given by the precision, the function
+ would need to access a wide character one past the end of the
+ array."
+ So if there is a precision, we must not use wcslen. */
+ /* This case has already been handled separately in VASNPRINTF. */
+ abort ();
+# endif
+ }
+ else
+# endif
+ {
+# if WIDE_CHAR_VERSION
+ /* ISO C says about %s in fwprintf:
+ "If the precision is not specified or is greater than the size
+ of the converted array, the converted array shall contain a
+ null wide character."
+ So if there is a precision, we must not use strlen. */
+ /* This case has already been handled separately in VASNPRINTF. */
+ abort ();
+# else
+ /* ISO C says about %s in fprintf:
+ "If the precision is not specified or greater than the size of
+ the array, the array shall contain a null character."
+ So if there is a precision, we must not use strlen. */
+ const char *arg = ap->arg[arg_index].a.a_string;
+
+ if (has_precision)
+ tmp_length = local_strnlen (arg, precision);
+ else
+ tmp_length = strlen (arg);
+# endif
+ }
+ 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 (!pad_ourselves)
+ {
+# 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 */
+
+ return tmp_length;
+}
+
+#endif
+
DCHAR_T *
VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
const FCHAR_T *format, va_list args)
return NULL;
#define CLEANUP() \
- free (d.dir); \
- if (a.arg) \
+ if (d.dir != d.direct_alloc_dir) \
+ free (d.dir); \
+ if (a.arg != a.direct_alloc_arg) \
free (a.arg);
if (PRINTF_FETCHARGS (args, &a) < 0)
else
{
do
- result[length++] = (unsigned char) *cp++;
+ result[length++] = *cp++;
while (--n > 0);
}
}
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
+ width = arg;
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);
+ width = -width;
}
- else
- width = arg;
}
else
{
characters = 0;
}
- if (has_width && width > characters
- && !(dp->flags & FLAG_LEFT))
+ if (characters < width && !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
}
# endif
- if (has_width && width > characters
- && (dp->flags & FLAG_LEFT))
+ if (characters < width && (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
characters = 0;
}
- if (has_width && width > characters
- && !(dp->flags & FLAG_LEFT))
+ if (characters < width && !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
}
# endif
- if (has_width && width > characters
- && (dp->flags & FLAG_LEFT))
+ if (characters < width && (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
characters = 0;
}
- if (has_width && width > characters
- && !(dp->flags & FLAG_LEFT))
+ if (characters < width && !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
}
# endif
- if (has_width && width > characters
- && (dp->flags & FLAG_LEFT))
+ if (characters < width && (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
}
}
#endif
-#if (!USE_SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && HAVE_WCHAR_T
+#if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && HAVE_WCHAR_T
else if (dp->conversion == 's'
# if WIDE_CHAR_VERSION
&& a.arg[dp->arg_index].type != TYPE_WIDE_STRING
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
+ width = arg;
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);
+ width = -width;
}
- else
- width = arg;
}
else
{
characters = 0;
}
- if (has_width && width > characters
- && !(dp->flags & FLAG_LEFT))
+ if (characters < width && !(dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
}
}
- if (has_width && width > characters
- && (dp->flags & FLAG_LEFT))
+ if (characters < width && (dp->flags & FLAG_LEFT))
{
size_t n = width - characters;
ENSURE_ALLOCATION (xsum (length, n));
size_t characters;
# if !DCHAR_IS_TCHAR
/* This code assumes that TCHAR_T is 'char'. */
- typedef int TCHAR_T_verify[2 * (sizeof (TCHAR_T) == 1) - 1];
+ verify (sizeof (TCHAR_T) == 1);
TCHAR_T *tmpsrc;
DCHAR_T *tmpdst;
size_t tmpdst_len;
errno = EILSEQ;
return NULL;
}
- if (precision < count)
+ if (precision < (unsigned int) count)
break;
arg_end++;
characters += count;
if (has_width)
{
# if ENABLE_UNISTDIO
- /* Outside POSIX, it's preferrable to compare the width
+ /* Outside POSIX, it's preferable to compare the width
against the number of _characters_ of the converted
value. */
w = DCHAR_MBSNLEN (result + length, characters);
/* w doesn't matter. */
w = 0;
- if (has_width && width > w
- && !(dp->flags & FLAG_LEFT))
+ if (w < width && !(dp->flags & FLAG_LEFT))
{
size_t n = width - w;
ENSURE_ALLOCATION (xsum (length, n));
count = wctomb (cbuf, *arg);
# endif
if (count <= 0)
- /* Inconsistency. */
- abort ();
+ {
+ /* Cannot convert. */
+ if (!(result == resultbuf || result == NULL))
+ free (result);
+ if (buf_malloced != NULL)
+ free (buf_malloced);
+ CLEANUP ();
+ errno = EILSEQ;
+ return NULL;
+ }
ENSURE_ALLOCATION (xsum (length, count));
memcpy (result + length, cbuf, count);
length += count;
length += tmpdst_len;
# endif
- if (has_width && width > w
- && (dp->flags & FLAG_LEFT))
+ if (w < width && (dp->flags & FLAG_LEFT))
{
size_t n = width - w;
ENSURE_ALLOCATION (xsum (length, n));
length += n;
}
}
- }
# endif
+ }
#endif
#if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE) && !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;
+ size_t count;
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 (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
+ width = arg;
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);
+ width = -width;
}
- else
- width = arg;
}
else
{
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
- has_width = 1;
}
has_precision = 0;
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)
+ count = p - tmp;
+
+ if (count < width)
{
- size_t pad = width - (p - tmp);
+ size_t pad = width - count;
DCHAR_T *end = p + pad;
if (flags & FLAG_LEFT)
p = end;
}
- {
- size_t count = p - tmp;
+ count = p - tmp;
- if (count >= tmp_length)
- /* tmp_length was incorrectly calculated - fix the
- code above! */
- abort ();
+ 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);
+ /* Make room for the result. */
+ if (count >= allocated - length)
+ {
+ size_t n = xsum (length, count);
- ENSURE_ALLOCATION (n);
- }
+ ENSURE_ALLOCATION (n);
+ }
- /* Append the result. */
- memcpy (result + length, tmp, count * sizeof (DCHAR_T));
- if (tmp != tmpbuf)
- free (tmp);
- length += count;
- }
+ /* 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_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL
arg_type type = a.arg[dp->arg_index].type;
# endif
int flags = dp->flags;
- int has_width;
size_t width;
+ size_t count;
int has_precision;
size_t precision;
size_t tmp_length;
DCHAR_T *pad_ptr;
DCHAR_T *p;
- has_width = 0;
width = 0;
if (dp->width_start != dp->width_end)
{
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
+ width = arg;
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);
+ width = -width;
}
- else
- width = arg;
}
else
{
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
- has_width = 1;
}
has_precision = 0;
digits without trailing zeroes. */
if (exponent >= 0)
{
- size_t count = exponent + 1;
+ size_t ecount = exponent + 1;
/* Note: count <= precision = ndigits. */
- for (; count > 0; count--)
+ for (; ecount > 0; ecount--)
*p++ = digits[--ndigits];
if ((flags & FLAG_ALT) || ndigits > nzeroes)
{
}
else
{
- size_t count = -exponent - 1;
+ size_t ecount = -exponent - 1;
*p++ = '0';
*p++ = decimal_point_char ();
- for (; count > 0; count--)
+ for (; ecount > 0; ecount--)
*p++ = '0';
while (ndigits > nzeroes)
{
static const wchar_t decimal_format[] =
/* Produce the same number of exponent digits
as the native printf implementation. */
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
{ '%', '+', '.', '3', 'd', '\0' };
# else
{ '%', '+', '.', '2', 'd', '\0' };
static const char decimal_format[] =
/* Produce the same number of exponent digits
as the native printf implementation. */
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
"%+.3d";
# else
"%+.2d";
digits without trailing zeroes. */
if (exponent >= 0)
{
- size_t count = exponent + 1;
- /* Note: count <= precision = ndigits. */
- for (; count > 0; count--)
+ size_t ecount = exponent + 1;
+ /* Note: ecount <= precision = ndigits. */
+ for (; ecount > 0; ecount--)
*p++ = digits[--ndigits];
if ((flags & FLAG_ALT) || ndigits > nzeroes)
{
}
else
{
- size_t count = -exponent - 1;
+ size_t ecount = -exponent - 1;
*p++ = '0';
*p++ = decimal_point_char ();
- for (; count > 0; count--)
+ for (; ecount > 0; ecount--)
*p++ = '0';
while (ndigits > nzeroes)
{
static const wchar_t decimal_format[] =
/* Produce the same number of exponent digits
as the native printf implementation. */
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
{ '%', '+', '.', '3', 'd', '\0' };
# else
{ '%', '+', '.', '2', 'd', '\0' };
static const char decimal_format[] =
/* Produce the same number of exponent digits
as the native printf implementation. */
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
"%+.3d";
# else
"%+.2d";
*p++ = '+';
/* Produce the same number of exponent digits as
the native printf implementation. */
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
*p++ = '0';
# endif
*p++ = '0';
/* 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)
+ count = p - tmp;
+
+ if (count < width)
{
- size_t pad = width - (p - tmp);
+ size_t pad = width - count;
DCHAR_T *end = p + pad;
if (flags & FLAG_LEFT)
p = end;
}
- {
- size_t count = p - tmp;
+ count = p - tmp;
- if (count >= tmp_length)
- /* tmp_length was incorrectly calculated - fix the
- code above! */
- abort ();
+ 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);
+ /* Make room for the result. */
+ if (count >= allocated - length)
+ {
+ size_t n = xsum (length, count);
- ENSURE_ALLOCATION (n);
- }
+ ENSURE_ALLOCATION (n);
+ }
- /* Append the result. */
- memcpy (result + length, tmp, count * sizeof (DCHAR_T));
- if (tmp != tmpbuf)
- free (tmp);
- length += count;
- }
+ /* 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_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
int has_width;
+#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
size_t width;
#endif
-#if !USE_SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
int has_precision;
size_t precision;
#endif
TCHAR_T *fbp;
unsigned int prefix_count;
int prefixes[2] IF_LINT (= { 0 });
+ int orig_errno;
#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_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
has_width = 0;
+#endif
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
width = 0;
if (dp->width_start != dp->width_end)
{
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
abort ();
arg = a.arg[dp->width_arg_index].a.a_int;
+ width = arg;
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);
+ width = -width;
}
- else
- width = arg;
}
else
{
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
+#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
has_width = 1;
+#endif
}
#endif
-#if !USE_SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
has_precision = 0;
precision = 6;
if (dp->precision_start != dp->precision_end)
#if !USE_SNPRINTF
/* Allocate a temporary buffer of sufficient size for calling
sprintf. */
- {
- 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)
- {
-# if WIDE_CHAR_VERSION
- /* ISO C says about %ls in fwprintf:
- "If the precision is not specified or is greater
- than the size of the array, the array shall
- contain a null wide character."
- So if there is a precision, we must not use
- wcslen. */
- const wchar_t *arg =
- a.arg[dp->arg_index].a.a_wide_string;
-
- if (has_precision)
- tmp_length = local_wcsnlen (arg, precision);
- else
- tmp_length = local_wcslen (arg);
-# else
- /* ISO C says about %ls in fprintf:
- "If a precision is specified, no more than that
- many bytes are written (including shift
- sequences, if any), and the array shall contain
- a null wide character if, to equal the
- multibyte character sequence length given by
- the precision, the function would need to
- access a wide character one past the end of the
- array."
- So if there is a precision, we must not use
- wcslen. */
- /* This case has already been handled above. */
- abort ();
-# endif
- }
- else
-# endif
- {
-# if WIDE_CHAR_VERSION
- /* ISO C says about %s in fwprintf:
- "If the precision is not specified or is greater
- than the size of the converted array, the
- converted array shall contain a null wide
- character."
- So if there is a precision, we must not use
- strlen. */
- /* This case has already been handled above. */
- abort ();
-# else
- /* ISO C says about %s in fprintf:
- "If the precision is not specified or greater
- than the size of the array, the array shall
- contain a null character."
- So if there is a precision, we must not use
- strlen. */
- const char *arg = a.arg[dp->arg_index].a.a_string;
-
- if (has_precision)
- tmp_length = local_strnlen (arg, precision);
- else
- tmp_length = strlen (arg);
-# endif
- }
- 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 (!pad_ourselves)
- {
-# 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 */
- }
+ tmp_length =
+ MAX_ROOM_NEEDED (&a, dp->arg_index, dp->conversion, type,
+ flags, width, has_precision, precision,
+ pad_ourselves);
if (tmp_length <= sizeof (tmpbuf) / sizeof (TCHAR_T))
tmp = tmpbuf;
*fbp++ = ' ';
if (flags & FLAG_ALT)
*fbp++ = '#';
+#if __GLIBC__ >= 2 && !defined __UCLIBC__
+ if (flags & FLAG_LOCALIZED)
+ *fbp++ = 'I';
+#endif
if (!pad_ourselves)
{
if (flags & FLAG_ZERO)
{
const FCHAR_T *mp = dp->width_start;
do
- *fbp++ = (unsigned char) *mp++;
+ *fbp++ = *mp++;
while (--n > 0);
}
}
{
const FCHAR_T *mp = dp->precision_start;
do
- *fbp++ = (unsigned char) *mp++;
+ *fbp++ = *mp++;
while (--n > 0);
}
}
#if HAVE_LONG_LONG_INT
case TYPE_LONGLONGINT:
case TYPE_ULONGLONGINT:
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
*fbp++ = 'I';
*fbp++ = '6';
*fbp++ = '4';
break;
# else
*fbp++ = 'l';
- /*FALLTHROUGH*/
# endif
#endif
+ FALLTHROUGH;
case TYPE_LONGINT:
case TYPE_ULONGINT:
#if HAVE_WINT_T
#endif
*fbp = dp->conversion;
#if USE_SNPRINTF
-# if !(__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
+# if ! (((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) \
+ && !defined __UCLIBC__) \
+ || (defined __APPLE__ && defined __MACH__) \
+ || (defined _WIN32 && ! defined __CYGWIN__))
fbp[1] = '%';
fbp[2] = 'n';
fbp[3] = '\0';
# else
/* On glibc2 systems from glibc >= 2.3 - probably also older
- ones - we know that snprintf's returns value conforms to
- ISO C 99: the gl_SNPRINTF_DIRECTIVE_N test passes.
+ ones - we know that snprintf's return value conforms to
+ ISO C 99: the tests gl_SNPRINTF_RETVAL_C99 and
+ gl_SNPRINTF_TRUNCATION_C99 pass.
Therefore we can avoid using %n in this situation.
On glibc2 systems from 2004-10-18 or newer, the use of %n
in format strings in writable memory may crash the program
(if compiled with _FORTIFY_SOURCE=2), so we should avoid it
in this situation. */
- /* On native Win32 systems (such as mingw), we can avoid using
+ /* On Mac OS X 10.3 or newer, we know that snprintf's return
+ value conforms to ISO C 99: the tests gl_SNPRINTF_RETVAL_C99
+ and gl_SNPRINTF_TRUNCATION_C99 pass.
+ Therefore we can avoid using %n in this situation.
+ On Mac OS X 10.13 or newer, the use of %n in format strings
+ in writable memory by default crashes the program, so we
+ should avoid it in this situation. */
+ /* On native Windows systems (such as mingw), we can avoid using
%n because:
- Although the gl_SNPRINTF_TRUNCATION_C99 test fails,
snprintf does not write more than the specified number
- Although the gl_SNPRINTF_RETVAL_C99 test fails, snprintf
allows us to recognize the case of an insufficient
buffer size: it returns -1 in this case.
- On native Win32 systems (such as mingw) where the OS is
+ On native Windows systems (such as mingw) where the OS is
Windows Vista, the use of %n in format strings by default
crashes the program. See
- <http://gcc.gnu.org/ml/gcc/2007-06/msg00122.html> and
- <http://msdn2.microsoft.com/en-us/library/ms175782(VS.80).aspx>
+ <https://gcc.gnu.org/ml/gcc/2007-06/msg00122.html> and
+ <https://msdn.microsoft.com/en-us/library/ms175782.aspx>
So we should avoid %n in this situation. */
fbp[1] = '\0';
# endif
*(TCHAR_T *) (result + length) = '\0';
#endif
+ orig_errno = errno;
+
for (;;)
{
int count = -1;
}
#endif
+ errno = 0;
switch (type)
{
case TYPE_SCHAR:
{
/* Verify that snprintf() has NUL-terminated its
result. */
- if (count < maxlen
+ if ((unsigned int) count < maxlen
&& ((TCHAR_T *) (result + length)) [count] != '\0')
abort ();
/* Portability hack. */
/* Look at the snprintf() return value. */
if (retcount < 0)
{
+# if !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF
/* 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;
+ buffer is too small.
+ But a failure at this point can also come
+ from other reasons than a too small buffer,
+ such as an invalid wide string argument to
+ the %ls directive, or possibly an invalid
+ floating-point argument. */
+ size_t tmp_length =
+ MAX_ROOM_NEEDED (&a, dp->arg_index,
+ dp->conversion, type, flags,
+ width,
+ has_precision,
+ precision, pad_ourselves);
+
+ if (maxlen < tmp_length)
+ {
+ /* Make more room. But try to do through
+ this reallocation only once. */
+ size_t bigger_need =
+ xsum (length,
+ xsum (tmp_length,
+ TCHARS_PER_DCHAR - 1)
+ / TCHARS_PER_DCHAR);
+ /* And always grow proportionally.
+ (There may be several arguments, each
+ needing a little more room than the
+ previous one.) */
+ size_t bigger_need2 =
+ xsum (xtimes (allocated, 2), 12);
+ if (bigger_need < bigger_need2)
+ bigger_need = bigger_need2;
+ ENSURE_ALLOCATION (bigger_need);
+ continue;
+ }
+# endif
}
else
count = retcount;
/* Attempt to handle failure. */
if (count < 0)
{
+ /* SNPRINTF or sprintf failed. Save and use the errno
+ that it has set, if any. */
+ int saved_errno = errno;
+ if (saved_errno == 0)
+ {
+ if (dp->conversion == 'c' || dp->conversion == 's')
+ saved_errno = EILSEQ;
+ else
+ saved_errno = EINVAL;
+ }
+
if (!(result == resultbuf || result == NULL))
free (result);
if (buf_malloced != NULL)
free (buf_malloced);
CLEANUP ();
- errno = EINVAL;
+
+ errno = saved_errno;
return NULL;
}
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];
+ verify (sizeof (TCHAR_T) == 1);
# if USE_SNPRINTF
tmpsrc = (TCHAR_T *) (result + length);
# else
tmpsrc += count;
tmpdst += count;
for (n = count; n > 0; n--)
- *--tmpdst = (unsigned char) *--tmpsrc;
+ *--tmpdst = *--tmpsrc;
}
}
#endif
{
size_t w;
# if ENABLE_UNISTDIO
- /* Outside POSIX, it's preferrable to compare the width
+ /* Outside POSIX, it's preferable to compare the width
against the number of _characters_ of the converted
value. */
w = DCHAR_MBSNLEN (result + length, count);
length += count;
break;
}
+ errno = orig_errno;
+#undef pad_ourselves
+#undef prec_ourselves
}
}
}
}
}
+#undef MAX_ROOM_NEEDED
#undef TCHARS_PER_DCHAR
#undef SNPRINTF
#undef USE_SNPRINTF
projects / debian / gzip / blobdiff