+
+ Bit Field for Variable-length Types (Class 9)
+
+
+
+ | Bits |
+ Meaning |
+
+
+
+ | 0-3 |
+ - Type
+ - 0 Variable-length sequence
+ - This variable-length datatype can be of any sequence
+ of data. Variable-length sequences do not have padding
+ or character set information.
+ - 1 Variable-length string
+ - This variable-length datatype is composed of a series of
+ characters. Variable-length strings have padding and
+ character set information.
+ |
+
+
+
+ | 4-7 |
+ - Padding type (variable-length string only)
+ - This four-bit value determines the type of padding
+ used for variable-length strings. The values are the same
+ as for the string padding type, as follows:
+ - 0 Null terminate
+ - A zero byte marks the end of a string and is guaranteed
+ to be present after converting a long string to a short
+ string. When converting a short string to a long string,
+ the value is padded with additional null characters
+ as necessary.
+
- 1 Null pad
+ - Null characters are added to the end of the value
+ during conversion from a short string to a longer string.
+ Conversion from a long string to a shorter string
+ simply truncates the value.
+ - 2 Space pad
+ - Space characters are added to the end of the value
+ during conversion from a short string to a longer string.
+ Conversion from a long string to a shorter string simply
+ truncates the value.
+ This is the Fortran representation of the string.
+
+ - 3-15 Reserved
+ - These values are reserved for future use.
+ |
+
+
+
+ | 8-11 |
+ - Character set (variable-length string only)
+ - This four-bit value specifies the character set
+ to be used for encoding the string.
+ - 0 8-bit ASCII
+ - As of this writing (June 2002, Release 1.4.4),
+ 8-bit ASCII is the only character set supported.
+ Therefore, no translations have been defined.
+ |
+
+
+
+ | 12-23 |
+ Reserved (zero). |
+
+
+