Functions

Summary

Compares two strings, ignoring case using specified Unicode rules.

Package

lispworks

Signatures

unicode-string-equal string1 string2 &key start1 start2 end1 end2 style => flag

unicode-string-not-equal string1 string2 &key start1 start2 end1 end2 style => mismatch-index

Arguments

string1

A string designator

string2

A string designator

start1 , end1

Bounding index designators of string1

start2 , end2

Bounding index designators of string2

style

A keyword

Values

flag

A generalized boolean

Values

mismatch-index

A bounding index of string1 or nil

Description

The functions unicode-string-equal and unicode-string-not-equal compare the designated substrings of string1 and string2 , ignoring case using Unicode rules specified by style . The values of start1 and start2 default to 0, while the values of end1 and end2 default to nil .

The returned value flag of unicode-string-equal is true if the strings are equal and false otherwise.

The returned value mismatch-index of unicode-string-not-equal is the index where the strings mismatch (as an offset from the beginning of string1 ) or nil otherwise.

The current implementation only supports one style of comparison:

:simple-case-fold

Compares each character of the strings using Unicode's simple case folding rules.

See also

choose-unicode-string-hash-function