| /* CFNumber.h |
| Copyright (c) 1999-2016, Apple Inc. and the Swift project authors |
| |
| Portions Copyright (c) 2014-2016 Apple Inc. and the Swift project authors |
| Licensed under Apache License v2.0 with Runtime Library Exception |
| See http://swift.org/LICENSE.txt for license information |
| See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| */ |
| |
| #if !defined(__COREFOUNDATION_CFNUMBER__) |
| #define __COREFOUNDATION_CFNUMBER__ 1 |
| |
| #include <CoreFoundation/CFBase.h> |
| |
| CF_IMPLICIT_BRIDGING_ENABLED |
| CF_EXTERN_C_BEGIN |
| |
| typedef const struct CF_BRIDGED_TYPE(NSNumber) __CFBoolean * CFBooleanRef; |
| |
| CF_EXPORT |
| const CFBooleanRef kCFBooleanTrue; |
| CF_EXPORT |
| const CFBooleanRef kCFBooleanFalse; |
| |
| CF_EXPORT |
| CFTypeID CFBooleanGetTypeID(void); |
| |
| CF_EXPORT |
| Boolean CFBooleanGetValue(CFBooleanRef boolean); |
| |
| typedef CF_ENUM(CFIndex, CFNumberType) { |
| /* Fixed-width types */ |
| kCFNumberSInt8Type = 1, |
| kCFNumberSInt16Type = 2, |
| kCFNumberSInt32Type = 3, |
| kCFNumberSInt64Type = 4, |
| kCFNumberFloat32Type = 5, |
| kCFNumberFloat64Type = 6, /* 64-bit IEEE 754 */ |
| /* Basic C types */ |
| kCFNumberCharType = 7, |
| kCFNumberShortType = 8, |
| kCFNumberIntType = 9, |
| kCFNumberLongType = 10, |
| kCFNumberLongLongType = 11, |
| kCFNumberFloatType = 12, |
| kCFNumberDoubleType = 13, |
| /* Other */ |
| kCFNumberCFIndexType = 14, |
| kCFNumberNSIntegerType CF_ENUM_AVAILABLE(10_5, 2_0) = 15, |
| kCFNumberCGFloatType CF_ENUM_AVAILABLE(10_5, 2_0) = 16, |
| kCFNumberMaxType = 16 |
| }; |
| |
| typedef const struct CF_BRIDGED_TYPE(NSNumber) __CFNumber * CFNumberRef; |
| |
| CF_EXPORT |
| const CFNumberRef kCFNumberPositiveInfinity; |
| CF_EXPORT |
| const CFNumberRef kCFNumberNegativeInfinity; |
| CF_EXPORT |
| const CFNumberRef kCFNumberNaN; |
| |
| CF_EXPORT |
| CFTypeID CFNumberGetTypeID(void); |
| |
| /* |
| Creates a CFNumber with the given value. The type of number pointed |
| to by the valuePtr is specified by type. If type is a floating point |
| type and the value represents one of the infinities or NaN, the |
| well-defined CFNumber for that value is returned. If either of |
| valuePtr or type is an invalid value, the result is undefined. |
| */ |
| CF_EXPORT |
| CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr); |
| |
| /* |
| Returns the storage format of the CFNumber's value. Note that |
| this is not necessarily the type provided in CFNumberCreate(). |
| */ |
| CF_EXPORT |
| CFNumberType CFNumberGetType(CFNumberRef number); |
| |
| /* |
| Returns the size in bytes of the type of the number. |
| */ |
| CF_EXPORT |
| CFIndex CFNumberGetByteSize(CFNumberRef number); |
| |
| /* |
| Returns true if the type of the CFNumber's value is one of |
| the defined floating point types. |
| */ |
| CF_EXPORT |
| Boolean CFNumberIsFloatType(CFNumberRef number); |
| |
| /* |
| Copies the CFNumber's value into the space pointed to by |
| valuePtr, as the specified type. If conversion needs to take |
| place, the conversion rules follow human expectation and not |
| C's promotion and truncation rules. If the conversion is |
| lossy, or the value is out of range, false is returned. Best |
| attempt at conversion will still be in *valuePtr. |
| */ |
| CF_EXPORT |
| Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr); |
| |
| /* |
| Compares the two CFNumber instances. If conversion of the |
| types of the values is needed, the conversion and comparison |
| follow human expectations and not C's promotion and comparison |
| rules. Negative zero compares less than positive zero. |
| Positive infinity compares greater than everything except |
| itself, to which it compares equal. Negative infinity compares |
| less than everything except itself, to which it compares equal. |
| Unlike standard practice, if both numbers are NaN, then they |
| compare equal; if only one of the numbers is NaN, then the NaN |
| compares greater than the other number if it is negative, and |
| smaller than the other number if it is positive. (Note that in |
| CFEqual() with two CFNumbers, if either or both of the numbers |
| is NaN, true is returned.) |
| */ |
| CF_EXPORT |
| CFComparisonResult CFNumberCompare(CFNumberRef number, CFNumberRef otherNumber, void *context); |
| |
| CF_EXTERN_C_END |
| CF_IMPLICIT_BRIDGING_DISABLED |
| |
| #endif /* ! __COREFOUNDATION_CFNUMBER__ */ |
| |