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authorJohn Högberg <[email protected]>2018-03-15 10:00:07 +0100
committerJohn Högberg <[email protected]>2018-03-23 09:50:59 +0100
commitd77f0bdb55fd1bd36c4f19ab78cb02177d365b12 (patch)
tree9d8d93d6418a2504586d6f41adcc63bc731f0c8f /erts/emulator
parent837cf1979852b439dd8fed555ad8c6cb10d9a794 (diff)
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Correct overflow in ERTS_SINT64_MIN and add macros for 16/32
This also removes a redundant #ifdef soup that had hidden the problem on most platforms.
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/sys.h40
1 files changed, 21 insertions, 19 deletions
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index c21acadd8d..be6ab57eeb 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -366,29 +366,11 @@ typedef UWord BeamInstr;
# define HAVE_INT64 1
typedef unsigned long Uint64;
typedef long Sint64;
-# ifdef ULONG_MAX
-# define ERTS_UINT64_MAX ULONG_MAX
-# endif
-# ifdef LONG_MAX
-# define ERTS_SINT64_MAX LONG_MAX
-# endif
-# ifdef LONG_MIN
-# define ERTS_SINT64_MIN LONG_MIN
-# endif
# define ErtsStrToSint64 strtol
# elif SIZEOF_LONG_LONG == 8
# define HAVE_INT64 1
typedef unsigned long long Uint64;
typedef long long Sint64;
-# ifdef ULLONG_MAX
-# define ERTS_UINT64_MAX ULLONG_MAX
-# endif
-# ifdef LLONG_MAX
-# define ERTS_SINT64_MAX LLONG_MAX
-# endif
-# ifdef LLONG_MIN
-# define ERTS_SINT64_MIN LLONG_MIN
-# endif
# define ErtsStrToSint64 strtoll
# else
# error "No 64-bit integer type found"
@@ -402,7 +384,7 @@ typedef long long Sint64;
# define ERTS_SINT64_MAX ((Sint64) ((((Uint64) 1) << 63)-1))
#endif
#ifndef ERTS_SINT64_MIN
-# define ERTS_SINT64_MIN (-1*(((Sint64) 1) << 63))
+# define ERTS_SINT64_MIN ((Sint64) ((((Uint64) 1) << 63)))
#endif
#if SIZEOF_LONG == 4
@@ -415,6 +397,16 @@ typedef int Sint32;
#error Found no appropriate type to use for 'Uint32' and 'Sint32'
#endif
+#ifndef ERTS_UINT32_MAX
+# define ERTS_UINT32_MAX (~((Uint32) 0))
+#endif
+#ifndef ERTS_SINT32_MAX
+# define ERTS_SINT32_MAX ((Sint32) ((((Uint32) 1) << 31)-1))
+#endif
+#ifndef ERTS_SINT32_MIN
+# define ERTS_SINT32_MIN ((Sint32) ((((Uint32) 1) << 31)))
+#endif
+
#if SIZEOF_INT == 2
typedef unsigned int Uint16;
typedef int Sint16;
@@ -425,6 +417,16 @@ typedef short Sint16;
#error Found no appropriate type to use for 'Uint16' and 'Sint16'
#endif
+#ifndef ERTS_UINT16_MAX
+# define ERTS_UINT16_MAX (~((Uint16) 0))
+#endif
+#ifndef ERTS_SINT16_MAX
+# define ERTS_SINT16_MAX ((Sint16) ((((Uint16) 1) << 15)-1))
+#endif
+#ifndef ERTS_SINT16_MIN
+# define ERTS_SINT16_MIN ((Sint16) ((((Uint16) 1) << 15)))
+#endif
+
#if CHAR_BIT == 8
typedef unsigned char byte;
#else