#include "bashgetopt.h"
#include "common.h"
-#if defined (PRI_MACROS_BROKEN)
-# undef PRIdMAX
-#endif
-
-#if !defined (PRIdMAX)
-# if HAVE_LONG_LONG
-# define PRIdMAX "lld"
-# else
-# define PRIdMAX "ld"
-# endif
-#endif
-
#if !defined (errno)
extern int errno;
#endif
char b[2]; \
tw++; \
b[0] = c; b[1] = '\0'; \
- if (vflag) \
+ if (vflag) \
vbadd (b, 1); \
else \
putchar (c); \
if (nw < 0 || (vflag == 0 && ferror (stdout))) \
{ \
QUIT; \
- if (vflag) \
- builtin_error ("%s", strerror (errno)); \
+ builtin_error ("%s", strerror (errno)); \
PRETURN (EXECUTION_FAILURE); \
} \
tw += nw; \
extern int vsnprintf (char *, size_t, const char *, va_list) __attribute__((__format__ (printf, 3, 0)));
#endif
-static void printf_erange (char *);
+static inline void printf_erange (char *);
+static inline void report_erange (char *, char *);
static int printstr (char *, char *, int, int, int);
static int tescape (char *, char *, int *, int *);
static char *bexpand (char *, int, int *, int *);
static char *mklong (char *, char *, size_t);
static int getchr (void);
static char *getstr (void);
-static int getint (void);
+static int getint (int);
static intmax_t getintmax (void);
static uintmax_t getuintmax (void);
decodeprec (char *ps)
{
intmax_t mpr;
+ int pr;
+ char *s;
+ s = ps; /* error checking */
mpr = *ps++ - '0';
while (DIGIT (*ps))
mpr = (mpr * 10) + (*ps++ - '0');
- return (mpr < 0 || mpr > INT_MAX) ? INT_MAX : mpr;
+ if (mpr < 0 || mpr > INT_MAX)
+ {
+#if 0
+ report_erange (s, ps);
+#endif
+ return -1;
+ }
+ return (pr = mpr);
}
int
{
fmt++;
have_fieldwidth = 1;
- fieldwidth = getint ();
- /* Handle field with overflow by ignoring it. */
- if (fieldwidth == INT_MAX || fieldwidth == INT_MIN)
- fieldwidth = 0;
+ /* Handle field with overflow by ignoring fieldwidth for now.
+ getint() prints a message. */
+ fieldwidth = getint (0);
}
else
while (DIGIT (*fmt))
{
fmt++;
have_precision = 1;
- precision = getint ();
- /* Handle precision overflow by ignoring it. "A negative
- precision is treated as if it were missing." */
- if (precision == INT_MAX || precision == INT_MIN)
- precision = -1;
+ /* Handle precision overflow by ignoring precision for now.
+ getint() prints a message.
+ "A negative precision is treated as if it were missing." */
+ precision = getint (-1);
}
else
{
long p;
intmax_t pp;
- p = pp = getintmax ();
- if (p != pp)
+ pp = getintmax ();
+ if (pp < LONG_MIN || pp > LONG_MAX)
{
f = mklong (start, PRIdMAX, sizeof (PRIdMAX) - 2);
PF (f, pp);
in "long". This also works around some long
long and/or intmax_t library bugs in the common
case, e.g. glibc 2.2 x86. */
+ p = pp;
f = mklong (start, "l", 1);
PF (f, p);
}
PRETURN (retval);
}
-static void
+static inline void
printf_erange (char *s)
{
builtin_error (_("%s: %s"), s, strerror(ERANGE));
conversion_error = 1;
}
+static inline void
+report_erange (char *s, char *e)
+{
+ unsigned char sc;
+
+ sc = *e;
+ *e = 0;
+ printf_erange (s);
+ *e = sc;
+}
+
/* We duplicate a lot of what printf(3) does here. */
/* FMT: format
STRING: expanded string argument
static int
printstr (char *fmt, char *string, int len, int fieldwidth, int precision)
{
-#if 0
char *s;
-#endif
int padlen, nc, ljust, i;
int fw, pr; /* fieldwidth and precision */
intmax_t mfw, mpr;
}
else if (DIGIT (*fmt))
{
+ s = fmt;
mfw = *fmt++ - '0';
while (DIGIT (*fmt))
mfw = (mfw * 10) + (*fmt++ - '0');
- /* Error if fieldwidth > INT_MAX here? */
- fw = (mfw < 0 || mfw > INT_MAX) ? INT_MAX : mfw;
+ /* Error if fieldwidth > INT_MAX here */
+ if (mfw < 0 || mfw > INT_MAX)
+ {
+ report_erange (s, fmt);
+ fw = 0;
+ }
+ else
+ fw = mfw;
}
/* get precision, if present. doesn't handle negative precisions */
}
else if (DIGIT (*fmt))
{
+ s = fmt;
mpr = *fmt++ - '0';
while (DIGIT (*fmt))
mpr = (mpr * 10) + (*fmt++ - '0');
- /* Error if precision > INT_MAX here? */
- pr = (mpr < 0 || mpr > INT_MAX) ? INT_MAX : mpr;
+ /* Error if precision > INT_MAX here */
+ if (mpr < 0 || mpr > INT_MAX)
+ {
+ report_erange (s, fmt);
+ pr = -1;
+ }
+ else
+ pr = mpr;
if (pr < precision && precision < INT_MAX)
pr = precision; /* XXX */
}
static int
printwidestr (char *fmt, wchar_t *wstring, size_t len, int fieldwidth, int precision)
{
-#if 0
char *s;
-#endif
char *string;
int padlen, nc, ljust, i;
int fw, pr; /* fieldwidth and precision */
mfw = *fmt++ - '0';
while (DIGIT (*fmt))
mfw = (mfw * 10) + (*fmt++ - '0');
- /* Error if fieldwidth > INT_MAX here? */
- fw = (mfw < 0 || mfw > INT_MAX) ? INT_MAX : mfw;
+ /* Error if fieldwidth > INT_MAX here */
+ if (mfw < 0 || mfw > INT_MAX)
+ {
+ report_erange (s, fmt);
+ fw = 0;
+ }
+ else
+ fw = mfw;
}
/* get precision, if present. doesn't handle negative precisions */
mpr = *fmt++ - '0';
while (DIGIT (*fmt))
mpr = (mpr * 10) + (*fmt++ - '0');
- /* Error if precision > INT_MAX here? */
- pr = (mpr < 0 || mpr > INT_MAX) ? INT_MAX : mpr;
+ /* Error if precision > INT_MAX here */
+ if (mpr < 0 || mpr > INT_MAX)
+ {
+ report_erange (s, fmt);
+ pr = -1;
+ }
+ else
+ pr = mpr;
if (pr < precision && precision < INT_MAX)
pr = precision; /* XXX */
}
/* Don't call getintmax here because it may consume an argument on error, and
we call this to get field width/precision arguments. */
static int
-getint (void)
+getint (int overflow_retval)
{
intmax_t ret;
char *ep;
+ int overflow;
if (garglist == 0)
return (0);
errno = 0;
ret = strtoimax (garglist->word->word, &ep, 0);
+ overflow = (errno == ERANGE) || (ret < INT_MIN || ret > INT_MAX);
if (*ep)
{
sh_invalidnum (garglist->word->word);
conversion_error = 1;
}
- else if (errno == ERANGE)
+ else if (overflow)
printf_erange (garglist->word->word);
- else if (ret > INT_MAX)
- {
- printf_erange (garglist->word->word);
- ret = INT_MAX;
- }
- else if (ret < INT_MIN)
- {
- printf_erange (garglist->word->word);
- ret = INT_MIN;
- }
garglist = garglist->next;
- return ((int)ret);
+ return (overflow ? overflow_retval : (int)ret);
}
static intmax_t
--- /dev/null
+/* intprops-internal.h -- properties of integer types not visible to users
+
+ Copyright (C) 2001-2024 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 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU 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, see <https://www.gnu.org/licenses/>. */
+
+#ifndef _GL_INTPROPS_INTERNAL_H
+#define _GL_INTPROPS_INTERNAL_H
+
+#include <limits.h>
+
+/* Pacify GCC 13.2 in some calls to _GL_EXPR_SIGNED. */
+#if defined __GNUC__ && 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+
+/* Return a value with the common real type of E and V and the value of V.
+ Do not evaluate E. */
+#define _GL_INT_CONVERT(e, v) ((1 ? 0 : (e)) + (v))
+
+/* Act like _GL_INT_CONVERT (E, -V) but work around a bug in IRIX 6.5 cc; see
+ <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00406.html>. */
+#define _GL_INT_NEGATE_CONVERT(e, v) ((1 ? 0 : (e)) - (v))
+
+/* The extra casts in the following macros work around compiler bugs,
+ e.g., in Cray C 5.0.3.0. */
+
+/* True if the real type T is signed. */
+#define _GL_TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* Return 1 if the real expression E, after promotion, has a
+ signed or floating type. Do not evaluate E. */
+#define _GL_EXPR_SIGNED(e) (_GL_INT_NEGATE_CONVERT (e, 1) < 0)
+
+
+/* Minimum and maximum values for integer types and expressions. */
+
+/* The width in bits of the integer type or expression T.
+ Do not evaluate T. T must not be a bit-field expression.
+ Padding bits are not supported; this is checked at compile-time below. */
+#define _GL_TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
+
+/* The maximum and minimum values for the type of the expression E,
+ after integer promotion. E is not evaluated. */
+#define _GL_INT_MINIMUM(e) \
+ (_GL_EXPR_SIGNED (e) \
+ ? ~ _GL_SIGNED_INT_MAXIMUM (e) \
+ : _GL_INT_CONVERT (e, 0))
+#define _GL_INT_MAXIMUM(e) \
+ (_GL_EXPR_SIGNED (e) \
+ ? _GL_SIGNED_INT_MAXIMUM (e) \
+ : _GL_INT_NEGATE_CONVERT (e, 1))
+#define _GL_SIGNED_INT_MAXIMUM(e) \
+ (((_GL_INT_CONVERT (e, 1) << (_GL_TYPE_WIDTH (+ (e)) - 2)) - 1) * 2 + 1)
+
+/* Work around OpenVMS incompatibility with C99. */
+#if !defined LLONG_MAX && defined __INT64_MAX
+# define LLONG_MAX __INT64_MAX
+# define LLONG_MIN __INT64_MIN
+#endif
+
+/* This include file assumes that signed types are two's complement without
+ padding bits; the above macros have undefined behavior otherwise.
+ If this is a problem for you, please let us know how to fix it for your host.
+ This assumption is tested by the intprops-tests module. */
+
+/* Does the __typeof__ keyword work? This could be done by
+ 'configure', but for now it's easier to do it by hand. */
+#if (2 <= __GNUC__ \
+ || (4 <= __clang_major__) \
+ || (1210 <= __IBMC__ && defined __IBM__TYPEOF__) \
+ || (0x5110 <= __SUNPRO_C && !__STDC__))
+# define _GL_HAVE___TYPEOF__ 1
+#else
+# define _GL_HAVE___TYPEOF__ 0
+#endif
+
+/* Return 1 if the integer type or expression T might be signed. Return 0
+ if it is definitely unsigned. T must not be a bit-field expression.
+ This macro does not evaluate its argument, and expands to an
+ integer constant expression. */
+#if _GL_HAVE___TYPEOF__
+# define _GL_SIGNED_TYPE_OR_EXPR(t) _GL_TYPE_SIGNED (__typeof__ (t))
+#else
+# define _GL_SIGNED_TYPE_OR_EXPR(t) 1
+#endif
+
+/* Return 1 if - A would overflow in [MIN,MAX] arithmetic.
+ A should not have side effects, and A's type should be an
+ integer with minimum value MIN and maximum MAX. */
+#define _GL_INT_NEGATE_RANGE_OVERFLOW(a, min, max) \
+ ((min) < 0 ? (a) < - (max) : 0 < (a))
+
+/* True if __builtin_add_overflow (A, B, P) and __builtin_sub_overflow
+ (A, B, P) work when P is non-null. */
+#ifdef __EDG__
+/* EDG-based compilers like nvc 22.1 cannot add 64-bit signed to unsigned
+ <https://bugs.gnu.org/53256>. */
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
+/* __builtin_{add,sub}_overflow exists but is not reliable in GCC 5.x and 6.x,
+ see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269>. */
+#elif 7 <= __GNUC__
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW 1
+#else
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
+#endif
+
+/* True if __builtin_mul_overflow (A, B, P) works when P is non-null. */
+#if defined __clang_major__ && __clang_major__ < 14
+/* Work around Clang bug <https://bugs.llvm.org/show_bug.cgi?id=16404>. */
+# define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
+#else
+# define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW
+#endif
+
+/* True if __builtin_add_overflow_p (A, B, C) works, and similarly for
+ __builtin_sub_overflow_p and __builtin_mul_overflow_p. */
+#ifdef __EDG__
+/* In EDG-based compilers like ICC 2021.3 and earlier,
+ __builtin_add_overflow_p etc. are not treated as integral constant
+ expressions even when all arguments are. */
+# define _GL_HAS_BUILTIN_OVERFLOW_P 0
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)
+#else
+# define _GL_HAS_BUILTIN_OVERFLOW_P (7 <= __GNUC__)
+#endif
+
+#if (!defined _GL_STDCKDINT_H && 202311 <= __STDC_VERSION__ \
+ && ! (_GL_HAS_BUILTIN_ADD_OVERFLOW && _GL_HAS_BUILTIN_MUL_OVERFLOW))
+# include <stdckdint.h>
+#endif
+
+/* Store the low-order bits of A + B, A - B, A * B, respectively, into *R.
+ Return 1 if the result overflows. Arguments should not have side
+ effects and A, B and *R can be of any integer type other than char,
+ bool, a bit-precise integer type, or an enumeration type. */
+#if _GL_HAS_BUILTIN_ADD_OVERFLOW
+# define _GL_INT_ADD_WRAPV(a, b, r) __builtin_add_overflow (a, b, r)
+# define _GL_INT_SUBTRACT_WRAPV(a, b, r) __builtin_sub_overflow (a, b, r)
+#elif defined ckd_add && defined ckd_sub && !defined _GL_STDCKDINT_H
+# define _GL_INT_ADD_WRAPV(a, b, r) ckd_add (r, + (a), + (b))
+# define _GL_INT_SUBTRACT_WRAPV(a, b, r) ckd_sub (r, + (a), + (b))
+#else
+# define _GL_INT_ADD_WRAPV(a, b, r) \
+ _GL_INT_OP_WRAPV (a, b, r, +, _GL_INT_ADD_RANGE_OVERFLOW)
+# define _GL_INT_SUBTRACT_WRAPV(a, b, r) \
+ _GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
+#endif
+#if _GL_HAS_BUILTIN_MUL_OVERFLOW
+# if ((9 < __GNUC__ + (3 <= __GNUC_MINOR__) \
+ || (__GNUC__ == 8 && 4 <= __GNUC_MINOR__)) \
+ && !defined __EDG__)
+# define _GL_INT_MULTIPLY_WRAPV(a, b, r) __builtin_mul_overflow (a, b, r)
+# else
+ /* Work around GCC bug 91450. */
+# define _GL_INT_MULTIPLY_WRAPV(a, b, r) \
+ ((!_GL_SIGNED_TYPE_OR_EXPR (*(r)) && _GL_EXPR_SIGNED (a) && _GL_EXPR_SIGNED (b) \
+ && _GL_INT_MULTIPLY_RANGE_OVERFLOW (a, b, 0, (__typeof__ (*(r))) -1)) \
+ ? ((void) __builtin_mul_overflow (a, b, r), 1) \
+ : __builtin_mul_overflow (a, b, r))
+# endif
+#elif defined ckd_mul && !defined _GL_STDCKDINT_H
+# define _GL_INT_MULTIPLY_WRAPV(a, b, r) ckd_mul (r, + (a), + (b))
+#else
+# define _GL_INT_MULTIPLY_WRAPV(a, b, r) \
+ _GL_INT_OP_WRAPV (a, b, r, *, _GL_INT_MULTIPLY_RANGE_OVERFLOW)
+#endif
+
+/* Nonzero if this compiler has GCC bug 68193 or Clang bug 25390. See:
+ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68193
+ https://llvm.org/bugs/show_bug.cgi?id=25390
+ For now, assume all versions of GCC-like compilers generate bogus
+ warnings for _Generic. This matters only for compilers that
+ lack relevant builtins. */
+#if __GNUC__ || defined __clang__
+# define _GL__GENERIC_BOGUS 1
+#else
+# define _GL__GENERIC_BOGUS 0
+#endif
+
+/* Store the low-order bits of A <op> B into *R, where OP specifies
+ the operation and OVERFLOW the overflow predicate. Return 1 if the
+ result overflows. Arguments should not have side effects,
+ and A, B and *R can be of any integer type other than char, bool, a
+ bit-precise integer type, or an enumeration type. */
+#if 201112 <= __STDC_VERSION__ && !_GL__GENERIC_BOGUS
+# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
+ (_Generic \
+ (*(r), \
+ signed char: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ signed char, SCHAR_MIN, SCHAR_MAX), \
+ unsigned char: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ unsigned char, 0, UCHAR_MAX), \
+ short int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ short int, SHRT_MIN, SHRT_MAX), \
+ unsigned short int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ unsigned short int, 0, USHRT_MAX), \
+ int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ int, INT_MIN, INT_MAX), \
+ unsigned int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ unsigned int, 0, UINT_MAX), \
+ long int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ long int, LONG_MIN, LONG_MAX), \
+ unsigned long int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ unsigned long int, 0, ULONG_MAX), \
+ long long int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+ long long int, LLONG_MIN, LLONG_MAX), \
+ unsigned long long int: \
+ _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+ unsigned long long int, 0, ULLONG_MAX)))
+#else
+/* Store the low-order bits of A <op> B into *R, where OP specifies
+ the operation and OVERFLOW the overflow predicate. If *R is
+ signed, its type is ST with bounds SMIN..SMAX; otherwise its type
+ is UT with bounds U..UMAX. ST and UT are narrower than int.
+ Return 1 if the result overflows. Arguments should not have side
+ effects, and A, B and *R can be of any integer type other than
+ char, bool, a bit-precise integer type, or an enumeration type. */
+# if _GL_HAVE___TYPEOF__
+# define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
+ (_GL_TYPE_SIGNED (__typeof__ (*(r))) \
+ ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, st, smin, smax) \
+ : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, ut, 0, umax))
+# else
+# define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
+ (overflow (a, b, smin, smax) \
+ ? (overflow (a, b, 0, umax) \
+ ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 1) \
+ : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) < 0) \
+ : (overflow (a, b, 0, umax) \
+ ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) >= 0 \
+ : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 0)))
+# endif
+
+# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
+ (sizeof *(r) == sizeof (signed char) \
+ ? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
+ signed char, SCHAR_MIN, SCHAR_MAX, \
+ unsigned char, UCHAR_MAX) \
+ : sizeof *(r) == sizeof (short int) \
+ ? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
+ short int, SHRT_MIN, SHRT_MAX, \
+ unsigned short int, USHRT_MAX) \
+ : sizeof *(r) == sizeof (int) \
+ ? (_GL_EXPR_SIGNED (*(r)) \
+ ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ int, INT_MIN, INT_MAX) \
+ : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
+ unsigned int, 0, UINT_MAX)) \
+ : _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow))
+# ifdef LLONG_MAX
+# define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
+ (sizeof *(r) == sizeof (long int) \
+ ? (_GL_EXPR_SIGNED (*(r)) \
+ ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ long int, LONG_MIN, LONG_MAX) \
+ : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ unsigned long int, 0, ULONG_MAX)) \
+ : (_GL_EXPR_SIGNED (*(r)) \
+ ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+ long long int, LLONG_MIN, LLONG_MAX) \
+ : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
+ unsigned long long int, 0, ULLONG_MAX)))
+# else
+# define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
+ (_GL_EXPR_SIGNED (*(r)) \
+ ? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ long int, LONG_MIN, LONG_MAX) \
+ : _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
+ unsigned long int, 0, ULONG_MAX))
+# endif
+#endif
+
+/* Store the low-order bits of A <op> B into *R, where the operation
+ is given by OP. Use the unsigned type UT for calculation to avoid
+ overflow problems. *R's type is T, with extrema TMIN and TMAX.
+ T can be any signed integer type other than char, bool, a
+ bit-precise integer type, or an enumeration type.
+ Return 1 if the result overflows. */
+#define _GL_INT_OP_CALC(a, b, r, op, overflow, ut, t, tmin, tmax) \
+ (overflow (a, b, tmin, tmax) \
+ ? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 1) \
+ : (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 0))
+
+/* Return 1 if the integer expressions A - B and -A would overflow,
+ respectively. Arguments should not have side effects,
+ and can be any signed integer type other than char, bool, a
+ bit-precise integer type, or an enumeration type.
+ These macros are tuned for their last input argument being a constant. */
+
+#if _GL_HAS_BUILTIN_OVERFLOW_P
+# define _GL_INT_NEGATE_OVERFLOW(a) \
+ __builtin_sub_overflow_p (0, a, (__typeof__ (- (a))) 0)
+#else
+# define _GL_INT_NEGATE_OVERFLOW(a) \
+ _GL_INT_NEGATE_RANGE_OVERFLOW (a, _GL_INT_MINIMUM (a), _GL_INT_MAXIMUM (a))
+#endif
+
+/* Return the low-order bits of A <op> B, where the operation is given
+ by OP. Use the unsigned type UT for calculation to avoid undefined
+ behavior on signed integer overflow, and convert the result to type T.
+ UT is at least as wide as T and is no narrower than unsigned int,
+ T is two's complement, and there is no padding or trap representations.
+ Assume that converting UT to T yields the low-order bits, as is
+ done in all known two's-complement C compilers. E.g., see:
+ https://gcc.gnu.org/onlinedocs/gcc/Integers-implementation.html
+
+ According to the C standard, converting UT to T yields an
+ implementation-defined result or signal for values outside T's
+ range. However, code that works around this theoretical problem
+ runs afoul of a compiler bug in Oracle Studio 12.3 x86. See:
+ https://lists.gnu.org/r/bug-gnulib/2017-04/msg00049.html
+ As the compiler bug is real, don't try to work around the
+ theoretical problem. */
+
+#define _GL_INT_OP_WRAPV_VIA_UNSIGNED(a, b, op, ut, t) \
+ ((t) ((ut) (a) op (ut) (b)))
+
+/* Return true if the numeric values A + B, A - B, A * B fall outside
+ the range TMIN..TMAX. Arguments should not have side effects
+ and can be any integer type other than char, bool,
+ a bit-precise integer type, or an enumeration type.
+ TMIN should be signed and nonpositive.
+ TMAX should be positive, and should be signed unless TMIN is zero. */
+#define _GL_INT_ADD_RANGE_OVERFLOW(a, b, tmin, tmax) \
+ ((b) < 0 \
+ ? (((tmin) \
+ ? ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (a, (tmin) - (b))) || (b) < (tmin)) \
+ && (a) < (tmin) - (b)) \
+ : (a) <= -1 - (b)) \
+ || ((_GL_EXPR_SIGNED (a) ? 0 <= (a) : (tmax) < (a)) && (tmax) < (a) + (b))) \
+ : (a) < 0 \
+ ? (((tmin) \
+ ? ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (b, (tmin) - (a))) || (a) < (tmin)) \
+ && (b) < (tmin) - (a)) \
+ : (b) <= -1 - (a)) \
+ || ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (a, b)) || (tmax) < (b)) \
+ && (tmax) < (a) + (b))) \
+ : (tmax) < (b) || (tmax) - (b) < (a))
+#define _GL_INT_SUBTRACT_RANGE_OVERFLOW(a, b, tmin, tmax) \
+ (((a) < 0) == ((b) < 0) \
+ ? ((a) < (b) \
+ ? !(tmin) || -1 - (tmin) < (b) - (a) - 1 \
+ : (tmax) < (a) - (b)) \
+ : (a) < 0 \
+ ? ((!_GL_EXPR_SIGNED (_GL_INT_CONVERT ((a) - (tmin), b)) && (a) - (tmin) < 0) \
+ || (a) - (tmin) < (b)) \
+ : ((! (_GL_EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
+ && _GL_EXPR_SIGNED (_GL_INT_CONVERT ((tmax) + (b), a))) \
+ && (tmax) <= -1 - (b)) \
+ || (tmax) + (b) < (a)))
+#define _GL_INT_MULTIPLY_RANGE_OVERFLOW(a, b, tmin, tmax) \
+ ((b) < 0 \
+ ? ((a) < 0 \
+ ? (_GL_EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
+ ? (a) < (tmax) / (b) \
+ : ((_GL_INT_NEGATE_OVERFLOW (b) \
+ ? _GL_INT_CONVERT (b, tmax) >> (_GL_TYPE_WIDTH (+ (b)) - 1) \
+ : (tmax) / -(b)) \
+ <= -1 - (a))) \
+ : _GL_INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (b, tmin)) && (b) == -1 \
+ ? (_GL_EXPR_SIGNED (a) \
+ ? 0 < (a) + (tmin) \
+ : 0 < (a) && -1 - (tmin) < (a) - 1) \
+ : (tmin) / (b) < (a)) \
+ : (b) == 0 \
+ ? 0 \
+ : ((a) < 0 \
+ ? (_GL_INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (a, tmin)) && (a) == -1 \
+ ? (_GL_EXPR_SIGNED (b) ? 0 < (b) + (tmin) : -1 - (tmin) < (b) - 1) \
+ : (tmin) / (a) < (b)) \
+ : (tmax) / (b) < (a)))
+
+#endif /* _GL_INTPROPS_INTERNAL_H */
projects / thirdparty / bash.git / commitdiff
