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Chapter 5 - Text Utilities / Text Utilities Reference

Routines

Determining Sorting Order for Strings in the Same Language

This section describes text routines that you can use to determine the sorting order of two strings.

Some of the routines operate on Pascal strings and others on text strings. Pascal strings are stored using standard Pascal string representation, which precedes the text characters with a length byte; these strings are limited to 255 bytes of data. Text strings do not use a length byte and can be up to 32 KB in length. Pascal strings are passed directly as parameters, while text strings are specified by an address value and an integer length value.

• The RelString function compares two Pascal strings using the string comparison rules of the Macintosh file system. This function does not make use of any script or language information, assuming the use of a Roman script system.
• The CompareString function compares two Pascal strings, making use of the string comparison information from a specified resource.
• The CompareText function compares two text strings for equality, making use of the string comparison information from a specified resource.

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Subtopics

RelString

CompareString

CompareText