Qt - 全局数据类型

<QtGlobal>

 1 typedef signed char qint8; /* 8 bit signed */
 2 typedef unsigned char quint8; /* 8 bit unsigned */
 3 typedef short qint16; /* 16 bit signed */
 4 typedef unsigned short quint16; /* 16 bit unsigned */
 5 typedef int qint32; /* 32 bit signed */
 6 typedef unsigned int quint32; /* 32 bit unsigned */
 7 #if defined(Q_OS_WIN) && !defined(Q_CC_GNU) && !defined(Q_CC_MWERKS)
 8 # define Q_INT64_C(c) c ## i64 /* signed 64 bit constant */
 9 # define Q_UINT64_C(c) c ## ui64 /* unsigned 64 bit constant */
10 typedef __int64 qint64; /* 64 bit signed */
11 typedef unsigned __int64 quint64; /* 64 bit unsigned */
12 #else
13 # define Q_INT64_C(c) static_cast<long long>(c ## LL) /* signed 64 bit constant */
14 # define Q_UINT64_C(c) static_cast<unsigned long long>(c ## ULL) /* unsigned 64 bit constant */
15 typedef long long qint64; /* 64 bit signed */
16 typedef unsigned long long quint64; /* 64 bit unsigned */
17 #endif
18 
19 typedef qint64 qlonglong;
20 typedef quint64 qulonglong;
21 
22 template <int> struct QIntegerForSize;
23 template <> struct QIntegerForSize<1> { typedef quint8 Unsigned; typedef qint8 Signed; };
24 template <> struct QIntegerForSize<2> { typedef quint16 Unsigned; typedef qint16 Signed; };
25 template <> struct QIntegerForSize<4> { typedef quint32 Unsigned; typedef qint32 Signed; };
26 template <> struct QIntegerForSize<8> { typedef quint64 Unsigned; typedef qint64 Signed; };
27 template <class T> struct QIntegerForSizeof: QIntegerForSize<sizeof(T)> { };
28 typedef QIntegerForSizeof<void*>::Unsigned quintptr;
29 typedef QIntegerForSizeof<void*>::Signed qptrdiff;
30 
31 typedef unsigned char uchar;
32 typedef unsigned short ushort;
33 typedef unsigned int uint;
34 typedef unsigned long ulong;