Fennel: UnicodeCharType Class Reference (original) (raw)
Inheritance diagram for UnicodeCharType:
| Public Types | |
|---|---|
| typedef uint | Ordinal |
| Each type must have a unique positive integer ordinal associated with it. | |
| Static Public Member Functions | |
| static int | compareStrings (Ucs2ConstBuffer pStr1, Ucs2ConstBuffer pStr2, uint nChars) |
| Private Member Functions | |
| virtual Ordinal | getOrdinal () const |
| **Returns:**the ordinal representing this type. | |
| virtual uint | getBitCount () const |
| **Returns:**number of bits in marshalled representation, or 0 for a non-bit type; currently only 0 or 1 is supported | |
| virtual uint | getFixedByteCount () const |
| **Returns:**the width in bytes for a fixed-width non-bit type which admits no per-attribute precision, or 0 for types with per-attribute precision; for bit types, this yields the size of the unmarshalled representation | |
| virtual uint | getMinByteCount (uint cbMaxWidth) const |
| Gets the number of bytes required to store the narrowest value with this type, given a particular max byte count. | |
| virtual uint | getAlignmentByteCount (uint cbWidth) const |
| Gets the alignment size in bytes required for values of this type, given a particular max byte count. | |
| virtual void | visitValue (DataVisitor &dataVisitor, void const *pData, TupleStorageByteLength cbData) const |
| Visits a value of this type. | |
| virtual int | compareValues (void const *pData1, TupleStorageByteLength cbData1, void const *pData2, TupleStorageByteLength cbData2) const |
| Compares two values of this type. |
Detailed Description
Definition at line 181 of file StandardTypeDescriptor.cpp.
Member Typedef Documentation
Each type must have a unique positive integer ordinal associated with it.
This is used to reconstruct a StoredTypeDescriptor object from a stored attribute definition.
Definition at line 44 of file StoredTypeDescriptor.h.
Member Function Documentation
| virtual Ordinal UnicodeCharType::getOrdinal | ( | | ) | const [inline, private, virtual] | | -------------------------------------------------------------------------------------------------------------- | - | | - | ---------------------------------- |
| virtual uint UnicodeCharType::getBitCount | ( | | ) | const [inline, private, virtual] | | ------------------------------------------------------------------------------------------------------ | - | | - | ---------------------------------- |
| virtual uint UnicodeCharType::getFixedByteCount | ( | | ) | const [inline, private, virtual] | | ------------------------------------------------------------------------------------------------------------ | - | | - | ---------------------------------- |
Returns:
the width in bytes for a fixed-width non-bit type which admits no per-attribute precision, or 0 for types with per-attribute precision; for bit types, this yields the size of the unmarshalled representation
Implements StoredTypeDescriptor.
Definition at line 193 of file StandardTypeDescriptor.cpp.
00194 { 00195 return 0; 00196 }
| virtual uint UnicodeCharType::getMinByteCount | ( | uint | cbMaxWidth | ) | const [inline, private, virtual] |
|---|
Gets the number of bytes required to store the narrowest value with this type, given a particular max byte count.
For a fixed-width type, the return value is the same as the input.
Parameters:
| cbMaxWidth | maximum width for which to compute the minimum |
|---|
Returns:
number of bytes
Implements StoredTypeDescriptor.
Definition at line 198 of file StandardTypeDescriptor.cpp.
00199 { 00200 return cbMaxWidth; 00201 }
| virtual uint UnicodeCharType::getAlignmentByteCount | ( | uint | cbWidth | ) | const [inline, private, virtual] |
|---|
Gets the alignment size in bytes required for values of this type, given a particular max byte count.
This must be 1, 2, 4, or 8, and may not be greater than 2 for variable-width datatypes. For fixed-width datatypes, the width must be a multiple of the alignment size.
Parameters:
| cbWidth | width for which to compute the alignment |
|---|
Returns:
number of bytes
Implements StoredTypeDescriptor.
Definition at line 203 of file StandardTypeDescriptor.cpp.
00204 { 00205 return 2; 00206 }
Compares two values of this type.
Parameters:
| pData1 | the address of the first data value |
|---|---|
| cbData1 | the width of the first data value in bytes |
| pData2 | the address of the second data value |
| cbData2 | the width of the second data value in bytes |
Returns:
negative if the first data value is less than the second; positive if greater; zero if equal
Implements StoredTypeDescriptor.
Definition at line 218 of file StandardTypeDescriptor.cpp.
References compareStrings().
00223 { 00224 assert(cbData1 == cbData2); 00225 assert((cbData1 & 1) == 0); 00226 Ucs2ConstBuffer pStr1 = static_cast(pData1); 00227 Ucs2ConstBuffer pStr2 = static_cast(pData2); 00228 uint nChars = (cbData1 >> 1); 00229 int c = compareStrings(pStr1, pStr2, nChars); 00230 return c; 00231 }
The documentation for this class was generated from the following file:
- /home/pub/open/dev/fennel/tuple/StandardTypeDescriptor.cpp
Generated on Mon Jun 22 04:00:48 2009 for Fennel by 
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