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136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/* CFNumber.h
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Copyright (c) 1999-2003, Apple, Inc. All rights reserved.
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*/
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#if !defined(__COREFOUNDATION_CFNUMBER__)
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#define __COREFOUNDATION_CFNUMBER__ 1
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#include <CoreFoundation/CFBase.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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typedef const struct __CFBoolean * CFBooleanRef;
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#if TARGET_OS_WIN32
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#define kCFBooleanTrue (*((const CFBooleanRef *)QTGetCFConstant("kCFBooleanTrue")))
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#define kCFBooleanFalse (*((const CFBooleanRef *)QTGetCFConstant("kCFBooleanFalse")))
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#else
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CF_EXPORT
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const CFBooleanRef kCFBooleanTrue;
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CF_EXPORT
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const CFBooleanRef kCFBooleanFalse;
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#endif
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CF_EXPORT
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CFTypeID CFBooleanGetTypeID(void);
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CF_EXPORT
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Boolean CFBooleanGetValue(CFBooleanRef boolean);
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typedef enum {
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/* Types from MacTypes.h */
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kCFNumberSInt8Type = 1,
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kCFNumberSInt16Type = 2,
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kCFNumberSInt32Type = 3,
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kCFNumberSInt64Type = 4,
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kCFNumberFloat32Type = 5,
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kCFNumberFloat64Type = 6, /* 64-bit IEEE 754 */
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/* Basic C types */
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kCFNumberCharType = 7,
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kCFNumberShortType = 8,
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kCFNumberIntType = 9,
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kCFNumberLongType = 10,
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kCFNumberLongLongType = 11,
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kCFNumberFloatType = 12,
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kCFNumberDoubleType = 13,
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/* Other */
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kCFNumberCFIndexType = 14,
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kCFNumberMaxType = 14
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} CFNumberType;
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typedef const struct __CFNumber * CFNumberRef;
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#if TARGET_OS_WIN32
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#define kCFNumberPositiveInfinity (*((const CFNumberRef *)QTGetCFConstant("kCFNumberPositiveInfinity")))
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#define kCFNumberNegativeInfinity (*((const CFNumberRef *)QTGetCFConstant("kCFNumberNegativeInfinity")))
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#define kCFNumberNaN (*((const CFNumberRef *)QTGetCFConstant("kCFNumberNaN")))
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#else
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CF_EXPORT
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const CFNumberRef kCFNumberPositiveInfinity;
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CF_EXPORT
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const CFNumberRef kCFNumberNegativeInfinity;
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CF_EXPORT
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const CFNumberRef kCFNumberNaN;
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#endif
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CF_EXPORT
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CFTypeID CFNumberGetTypeID(void);
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/*
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Creates a CFNumber with the given value. The type of number pointed
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to by the valuePtr is specified by type. If type is a floating point
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type and the value represents one of the infinities or NaN, the
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well-defined CFNumber for that value is returned. If either of
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valuePtr or type is an invalid value, the result is undefined.
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*/
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CF_EXPORT
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CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr);
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/*
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Returns the storage format of the CFNumber's value. Note that
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this is not necessarily the type provided in CFNumberCreate().
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*/
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CF_EXPORT
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CFNumberType CFNumberGetType(CFNumberRef number);
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/*
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Returns the size in bytes of the type of the number.
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*/
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CF_EXPORT
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CFIndex CFNumberGetByteSize(CFNumberRef number);
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/*
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Returns true if the type of the CFNumber's value is one of
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the defined floating point types.
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*/
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CF_EXPORT
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Boolean CFNumberIsFloatType(CFNumberRef number);
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/*
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Copies the CFNumber's value into the space pointed to by
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valuePtr, as the specified type. If conversion needs to take
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place, the conversion rules follow human expectation and not
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C's promotion and truncation rules. If the conversion is
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lossy, or the value is out of range, false is returned. Best
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attempt at conversion will still be in *valuePtr.
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*/
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CF_EXPORT
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Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr);
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/*
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Compares the two CFNumber instances. If conversion of the
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types of the values is needed, the conversion and comparison
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follow human expectations and not C's promotion and comparison
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rules. Negative zero compares less than positive zero.
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Positive infinity compares greater than everything except
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itself, to which it compares equal. Negative infinity compares
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less than everything except itself, to which it compares equal.
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Unlike standard practice, if both numbers are NaN, then they
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compare equal; if only one of the numbers is NaN, then the NaN
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compares greater than the other number if it is negative, and
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smaller than the other number if it is positive. (Note that in
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CFEqual() with two CFNumbers, if either or both of the numbers
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is NaN, true is returned.)
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*/
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CF_EXPORT
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CFComparisonResult CFNumberCompare(CFNumberRef number, CFNumberRef otherNumber, void *context);
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#if defined(__cplusplus)
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}
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#endif
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#endif /* ! __COREFOUNDATION_CFNUMBER__ */
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