#if defined(__CHAR_UNSIGNED__) || defined(__sgi) #define INT1 signed char /* integer, signed 1 Byte */ #define INT1_MIN SCHAR_MIN #define INT1_MAX SCHAR_MAX #else #define INT1 char /* integer, signed 1 Byte */ #define INT1_MIN CHAR_MIN #define INT1_MAX CHAR_MAX #endif #define UINT1 unsigned char /* integer, unsigned 1 Byte */ #define UINT1_MIN 0 #define UINT1_MAX UCHAR_MAX #define LONG_FORMAT _INT64_FORMAT typedef INT4_8 Hlong; typedef UINT4_8 Hulong;
看粗體部分,能夠看到 Hlong型在32位的機器上其實就是long型 表明4個字節 32位,在64位機器上有另外一種定義數組
再來看看halcon中最重要的數據類型HTuple,在C++裏面,halcon將HTuple類型封裝了類,其始祖類HRootObject,這個類至關於MFC裏面的CObject,halcon從HRootObject派生了HBaseArray,固然這兩個類是虛基類,有一些方法須要我HTuple本身實現,固然也有一些方法能夠直接用的。這兩個類在HCPPUtil裏,能夠看看。函數
HTuple類就是從HBaseArray派生,元組基類,至關於數組,具備以下的構造函數:spa
HTuple(int l); HTuple(float f); HTuple(double d); HTuple(const char *s); HTuple(const HCtrlVal &c); HTuple(const HTuple &in):HBaseArray() {CopyTuple(in);} HTuple(Hlong length, const HTuple &value); HTuple(const HTuple &length, const HTuple &value); HTuple(SpecialTuple d);
HTuple對各類操做符進行了重載:指針
operator HCtrlVal(void) const; HTuple operator () (Hlong min, Hlong max) const; HTuple operator () (const HTuple &min, const HTuple &max) const; HCtrlVal &operator [] (Hlong index); HCtrlVal operator [] (Hlong index) const; HCtrlVal &operator [] (const HTuple &index); HCtrlVal operator [] (const HTuple &index) const; HTuple &operator ++ (void); // nur fuer double und Hlong HBool operator ! (void) const; HTuple operator ~ (void) const; HTuple operator << (const HTuple &val) const; HTuple operator << (Hlong val) const; HTuple operator >> (const HTuple &val) const; HTuple operator >> (Hlong val) const; HTuple operator + (const HTuple &val) const; HTuple operator + (double val) const; HTuple operator + (int val) const;
在講解halcon是如何維護這樣一個HTuple中各類數據以前 ,先來看看這樣一個類:code
class LIntExport HCtrlVal { friend class HTuple; public: HCtrlVal(void) {val.type = UndefVal; val.par.l = 0;} #if !defined(_TMS320C6X) HCtrlVal(Hlong l) {val.type = LongVal; val.par.l = l;} #endif HCtrlVal(int l) {val.type = LongVal; val.par.l = l;} HCtrlVal(double d) {val.type = DoubleVal; val.par.f = d;} HCtrlVal(const char *s); HCtrlVal(const HCtrlVal &v) {CopyCtrlVal(v);} ~HCtrlVal(void) {ClearCtrlVal();} HCtrlVal& operator = (const HCtrlVal &v); // Type conversion int ValType() const {return val.type;} operator int(void) const {return I();} #if !defined(_TMS320C6X) operator Hlong(void) const {return L();} #endif operator double(void) const {return D();} operator const char*(void) const {return S();} operator const Hcpar&(void)const {return HCPAR();} // Access contents double D() const; Hlong L() const; int I() const; const char * S() const; const Hcpar& HCPAR()const; // Arithmetics HCtrlVal operator + (const HCtrlVal &val) const; HTuple operator + (const HTuple &val) const; HCtrlVal operator - (const HCtrlVal &val) const; HTuple operator - (const HTuple &val) const; HCtrlVal operator * (const HCtrlVal &val) const; HTuple operator * (const HTuple &val) const; HCtrlVal operator / (const HCtrlVal &val) const; HTuple operator / (const HTuple &val) const; HCtrlVal operator % (const HCtrlVal &val) const; HTuple operator % (const HTuple &val) const; HBool operator != (const HCtrlVal &val) const; HBool operator != (const HTuple &val) const; HBool operator == (const HCtrlVal &val) const; HBool operator == (const HTuple &val) const; HBool operator >= (const HCtrlVal &val) const; HBool operator >= (const HTuple &val) const; HBool operator <= (const HCtrlVal &val) const; HBool operator <= (const HTuple &val) const; HBool operator > (const HCtrlVal &val) const; HBool operator > (const HTuple &val) const; HBool operator < (const HCtrlVal &val) const; HBool operator < (const HTuple &val) const; const char *ClassName(void) const { return "HCtrlVal"; } int Version(void) const; int Revision(void) const; const char *Creation(void) const; private: // Data Hcpar val; // Value: one of the three types and type specifyer // Support operationen void ClearCtrlVal(); void CopyCtrlVal(const HCtrlVal& source); };
typedef struct { Hpar par; /* values */ INT1 type; /* type flag */ } Hcpar; /* parameter passing for the C interface */
typedef union { INT4_8 l; /* 4/8 byte integer (input) */ double f; /* 8 byte real (input) */ char *s; /* pointer to strings (input) */ } Hpar; /* parameter passing for the C interface */
typedef union { INT4_8 *l; /* 4/8 byte integer (output) */ double *f; /* 8 byte real (output) */ char *s; /* pointer to strings (output) */ VOIDP p; /* pointer to var. of any type (e.g. tuple)(output)*/ } Hvar; /* parameter passing for the C interface */
仔細看我用紅色粗體並加大的部分,這四段代碼能夠說是halcon維護HTuple這種數據類型的精髓了。下面咱們來說解一下:blog
首先HTuple類中有私有成員變量:three
private: HCtrlVal *tuple; // values (array of Hlong/float/string)
halcon給的註釋寫的很清楚,tuple是一羣值,指向一個數組,數組裏面有long型,浮點型及字符串型數據。這是一個指針,這個類就是維護這樣一個指針,具體此指針的內容,咱們往下看HCtrlVal: (這裏說一下這幾個單詞的意義吧:H->Halcon Ctrl->Control Val->Values 表示Halcon的控制變量,固然還有圖形變量,之後再講吧。)ci
private: // Data Hcpar val; // Value: one of the three types and type specifyer
HCtrlVal類就維護了這樣一個成員變量,halcon給的註釋是說 val 表明數據的三種類型中的一個,並指向一個值。那麼HTuple中的tuple指針就是維護了val組成的鏈表,這樣HTuple就能夠維護多種不一樣類型的數據。字符串
HTuple用起來的確很方便,halcon對其進行了大量的運算符重載包括像強制類型轉換,都不須要咱們手動去作,只須要在前面加個數據類型就好了。input
好了,因爲本人水平有限,文中可能會有紕漏,敬請指出!
added by xiejl