Caché ObjectScript Reference
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Returns the total width of the characters in an expression.
expression A string expression
pitch Optional — The numeric pitch value to use for full-width characters. The default is 2. Other permissible values are 1, 1.25, and 1.5. (These values with any number of trailing zeros are permissible.) All other pitch values result in a <FUNCTION> error.
$ZWIDTH is a DSM-J function available in Caché ObjectScript. $ZWIDTH returns the total width of the characters in expression. The pitch value determines the width to use for full-width characters. All other characters are assigned a width of 1 and are considered to be half-width.
$ZWIDTH can be abbreviated as $ZW in DSM-J mode. This abbreviation cannot be used in Caché mode.
Assume that the variable STR contains two half-width characters followed by a full-width character:
returns 3.5.
In this example, the two half-width characters total 2. Adding 1.5 (the specified pitch value) for the full-width characters produces a total of 3.5.
Full-width characters are determined by examining the pattern-match table loaded for your Caché process. Any character with the full-width attribute is considered to be a full-width character. You can use the special ZFWCHARZ patcode to check for this attribute (char?1ZFWCHARZ). For more information about the full-width attribute, see the description of the $X/$Y Tab in the section on System Classes for National Language Support in Caché Specialized System Tools and Utilities.
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