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Bug 732875 - 4/8 - CheckedInt: make nonstandard features optional - r=jwalden

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This commit is contained in:
Benoit Jacob 2012-05-14 15:50:19 -04:00
parent 3ee7ede282
commit ef47f45090
1 changed files with 42 additions and 13 deletions
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55
xpcom/ds/CheckedInt.h
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@ -40,9 +40,35 @@
#ifndef mozilla_CheckedInt_h
#define mozilla_CheckedInt_h
#include "prtypes.h"
/*** Build options. Comment out these #defines to disable the corresponding optional feature.
*** Disabling features may be useful for code using CheckedInt outside of Mozilla (e.g. WebKit)
***/
#include <mozilla/Assertions.h>
// enable support for NSPR types like PRInt64
#define CHECKEDINT_ENABLE_PR_INTEGER_TYPES
// enable support for long long and unsigned long long
#define CHECKEDINT_ENABLE_LONG_LONG
// enable usage of MOZ_STATIC_ASSERT to check for unsupported types.
// If disabled, static asserts are just removed. You'll still get compile errors, just less helpful ones.
#define CHECKEDINT_ENABLE_MOZ_ASSERTS
/*** End of build options
***/
#ifdef CHECKEDINT_ENABLE_MOZ_ASSERTS
#include <mozilla/Assertions.h>
#else
#ifndef MOZ_STATIC_ASSERT
#define MOZ_STATIC_ASSERT(x)
#endif
#endif
#ifdef CHECKEDINT_ENABLE_PR_INTEGER_TYPES
#include "prtypes.h"
#endif
#include <climits>
@ -95,18 +121,21 @@ template<> struct is_supported_pass_2<int> { enum { value = 1 }; };
template<> struct is_supported_pass_2<unsigned int> { enum { value = 1 }; };
template<> struct is_supported_pass_2<long> { enum { value = 1 }; };
template<> struct is_supported_pass_2<unsigned long> { enum { value = 1 }; };
template<> struct is_supported_pass_2<long long> { enum { value = 1 }; };
template<> struct is_supported_pass_2<unsigned long long> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt8> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint8> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt16> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint16> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt32> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint32> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt64> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint64> { enum { value = 1 }; };
#ifdef CHECKEDINT_ENABLE_LONG_LONG
template<> struct is_supported_pass_2<long long> { enum { value = 1 }; };
template<> struct is_supported_pass_2<unsigned long long> { enum { value = 1 }; };
#endif
#ifdef CHECKEDINT_ENABLE_PR_INTEGER_TYPES
template<> struct is_supported_pass_3<PRInt8> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint8> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt16> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint16> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt32> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint32> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRInt64> { enum { value = 1 }; };
template<> struct is_supported_pass_3<PRUint64> { enum { value = 1 }; };
#endif
/*** Step 2: some integer-traits kind of stuff. We're doing our own thing here rather than
*** relying on std::numeric_limits mostly for historical reasons (we still support PR integer types