3 * uprf.c -- "unsigned" lexical prefix
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
17 uprf (char *c1, char *c2)
29 c = (isalpha(c) && isupper(c)) ? tolower(c) : c;
30 mask = (isalpha(mask) && isupper(mask)) ? tolower(mask) : mask;
33 mask = (isalpha(c) && isalpha(*c1)) ? TO_LOWER : NO_MASK;
34 if ((c | mask) != (*c1 | mask))