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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #!F-adobe-helvetica-medium-r-normal--18*
#!N
#!N #!Rdxcmany DXComponentReq, DXComponentOpt, DXComponentReqLoc, DXComponentOptLoc #!N #!N
Function #!N #!N Access or typecheck a component in a Field.
#!N #!N Syntax #!N #!F-adobe-times-bold-r-normal--18* #include <dx/dx.h> Error DXComponentReq(Array a, Pointer
*data, int *n, int nreq, Type t, int dim) Error DXComponentOpt(Array
a, Pointer *data, int *n, int nreq, Type t, int dim)
Error DXComponentReqLoc(Array a, Pointer *data, int *n, int nreq, Type t,
int dim) Error DXComponentOptLoc(Array a, Pointer *data, int *n, int nreq,
Type t, int dim) #!EF #!N #!N Functional Details #!N #!N
Note: These routines will become obsolete in a future version of
Data Explorer. In their place, it is recommended that you now
use #!F-adobe-times-bold-r-normal--18* DXGetComponentValue #!EF and #!F-adobe-times-bold-r-normal--18* DXGetArrayInfo #!EF . #!N #!N
#!N The four routines have identical calling sequences, but differ as
follows. #!N #!N First, #!F-adobe-times-bold-r-normal--18* DXComponentOpt #!EF and #!F-adobe-times-bold-r-normal--18* DXComponentReq #!EF
return pointers to the global copy of the Array data, while
#!F-adobe-times-bold-r-normal--18* DXComponentOptLoc #!EF and #!F-adobe-times-bold-r-normal--18* DXComponentReqLoc #!EF return pointers to a
local copy of the Array data, and should be matched by
a #!F-adobe-times-bold-r-normal--18* DXFreeArrayDataLocal #!EF call. #!N #!N Second, #!F-adobe-times-bold-r-normal--18* DXComponentReq #!EF
and #!F-adobe-times-bold-r-normal--18* DXComponentReqLoc #!EF consider it an error if the component
is missing ( #!F-adobe-times-bold-r-normal--18* a #!EF is #!F-adobe-times-bold-r-normal--18* NULL #!EF ),
while #!F-adobe-times-bold-r-normal--18* DXComponentOpt #!EF and #!F-adobe-times-bold-r-normal--18* DXComponentOptLoc #!EF consider the component
optional and do not consider a #!F-adobe-times-bold-r-normal--18* NULL #!EF #!F-adobe-times-bold-r-normal--18* a
#!EF to be an error. #!N #!N If #!F-adobe-times-bold-r-normal--18* data #!EF
is not #!F-adobe-times-bold-r-normal--18* NULL #!EF , a pointer to a global
or local copy of the data is returned in #!F-adobe-times-bold-r-normal--18* *data
#!EF . If #!F-adobe-times-bold-r-normal--18* n #!EF is not #!F-adobe-times-bold-r-normal--18* NULL #!EF
, the number of items in the Array is returned in
#!F-adobe-times-bold-r-normal--18* *n #!EF . If #!F-adobe-times-bold-r-normal--18* n #!EF is #!F-adobe-times-bold-r-normal--18* NULL
#!EF , the number of Array items must be #!F-adobe-times-bold-r-normal--18* nreq
#!EF . The type of the Array must be #!F-adobe-times-bold-r-normal--18* t
#!EF . If #!F-adobe-times-bold-r-normal--18* dim #!EF is 0, the Array must
have rank 0 (scalar). If #!F-adobe-times-bold-r-normal--18* dim #!EF is nonzero, the
Array must have rank 1 and shape equal to #!F-adobe-times-bold-r-normal--18* dim
#!EF . #!N #!N The type is one of the following:
#!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* #!N TYPE_BYTE TYPE_HYPER TYPE_SHORT #!N TYPE_UBYTE
TYPE_INT TYPE_USHORT #!N TYPE_DOUBLE TYPE_UINT TYPE_STRING #!N TYPE_FLOAT #!EF #!EF #!N
#!N #!EC #!N Note: These functions will expand compact data Arrays
and use extra memory. #!N #!N #!N Return Value #!N #!N
Returns #!F-adobe-times-bold-r-normal--18* OK #!EF or returns #!F-adobe-times-bold-r-normal--18* ERROR #!EF and sets
an error code. #!N #!N See Also #!N #!N #!F-adobe-times-bold-r-normal--18* #!Ldxgad,dxall1219 h DXGetArrayData #!EL
, #!Ldxgai,dxall1222 h DXGetArrayInfo #!EL , #!Ldxgcv,dxall1228 h DXGetComponentValue #!EL #!EF #!N #!N #!Lfieldsc,dxall1062 h Field Class #!EL . #!N #!N
#!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Ldxcplus,dxall1185 h DXConcatenate, DXInvert, DXTranspose, DXAdjointTranspose, DXDeterminant, DXApply #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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