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#!N
#!CNavyBlue #!N #!Rmdeps Extracting Module Parameters #!N #!EC
#!N #!N This section describes routines that aid in the parsing
of parameters to modules. Inputs to modules that are simple items
such as integers, floats, and character strings are packaged as Array
Objects. The following routines simplify the extraction of such values. If
the Object does not match (even if promoted as described in
the following material), the routines return #!F-adobe-times-bold-r-normal--18* NULL #!EF but do
not set the error code. Otherwise they return the original Object
and fill in the pointer to the item. #!N #!N If
a float is expected, a byte, short, int, or long can
be promoted to float. If an integer is expected, a byte
or short can be promoted. If a float vector is expected,
a byte, short, or integer vector can be promoted. If a
string is expected, either a String Object or an Array of
characters is accepted. #!N #!I0 #!N #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18*
Object DXExtractInteger() #!EF #!EF #!I50 #!N Determines whether an Object can
be converted to an integer and, if so, extracts it. See
#!Lun7,dxall1087 s Note on Use #!EL . See #!Ldxei,dxall1208 h DXExtractInteger #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Object
DXExtractFloat() #!EF #!EF #!I50 #!N Determines whether an Object can be
converted to a floating-point value and, if so, extracts it. See
#!Ldxef,dxall1207 h DXExtractFloat #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Object DXExtractString() #!EF #!EF
#!I50 #!N Determines whether an Object can be converted to a
string and, if so, extracts it. See #!Lun7,dxall1087 s Note on Use #!EL . See #!Ldxes,dxall1211 h DXExtractString #!EL
. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Object DXExtractNthString() #!EF #!EF #!I50
#!N Determines whether an Object can be converted to a list
of strings and, if so, extracts the #!F-adobe-times-medium-i-normal--18* n #!EF th
one from it. See #!Ldxens,dxall1209 h DXExtractNthString #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18*
Object DXQueryParameter() #!EF #!EF #!I50 #!N Determines whether an Object can
be converted to a specific value type. See #!Ldxqp,dxall1347 h DXQueryParameter #!EL . #!N
#!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Object DXExtractParameter() #!EF #!EF #!I50 #!N Determines
whether an Object can be converted to a specific value type
and, if so, returns the value in the user-provided buffer. See
#!Ldxep,dxall1210 h DXExtractParameter #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Error DXQueryArrayConvert() #!EF #!N
Error DXQueryArrayConvertV(); #!EF #!I50 #!N Determine if the given Array can
be converted to an Array with the given type, category, rank,
and shape. See #!Ldxqacv,dxall1340 h DXQueryArrayConvert, DXQueryArrayConvertV #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Error
DXQueryArrayCommon() #!EF #!N Error DXQueryArrayCommonV(); #!EF #!I50 #!N Return a type,
category, rank, and shape to which all of the arrays can
be converted. See #!Ldxqacvm,dxall1339 h DXQueryArrayCommon, DXQueryArrayCommonV #!EL . #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Error
DXArrayConvert() #!EF #!N Error DXArrayConvertV(); #!EF #!I50 #!N Create a new
Array with a given type, category, rank, and shape from the
data in the given Array. See #!Ldxacv,dxall1174 h DXArrayConvert, DXArrayConvertV #!EL . #!N #!I0 #!N
#!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* Array DXScalarConvert() #!EF #!EF #!I50 #!N Converts the contents
of an Array into scalar floating-point values. See #!Ldxsct,dxall1364 h DXScalarConvert #!EL . #!I0
#!N #!N #!CIndianRed #!N #!N #!N #!F-adobe-times-bold-r-normal--18* id=un7.Note on Use #!Run7
#!N #!N If a routine expects either a character string or
an integer, the following code would determine the case and return
the value. #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N Object o = input_object_to_check;
#!N char *cp; #!N int i; #!N #!N if (DXExtractInteger(o, &i))
#!N x = i; #!N else if (DXExtractString(o, &cp)) #!N strcpy(buffer,
cp); #!N else #!N DXSetError(...); #!EF #!N #!N #!EC #!N #!N
#!EC #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lcrtdxos,dxall1088 h Creating Simple Data Explorer Objects #!EL
#!N #!F-adobe-times-medium-i-normal--18* #!N
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