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Use collate data for national alpha character ranges like [a-z]

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This commit is contained in:
Andrey A. Chernov 1996-08-11 16:08:17 +00:00
parent 1b91f0ec7f
commit 5c551438ec
1 changed files with 45 additions and 4 deletions
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49
lib/libc/regex/regcomp.c
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@ -121,6 +121,7 @@ static void enlarge __P((struct parse *p, sopno size));
static void stripsnug __P((struct parse *p, struct re_guts *g));
static void findmust __P((struct parse *p, struct re_guts *g));
static sopno pluscount __P((struct parse *p, struct re_guts *g));
static int collcmp __P((int c1, int c2));
#ifdef __cplusplus
}
@ -741,6 +742,37 @@ register struct parse *p;
EMIT(OANYOF, freezeset(p, cs));
}
static int collcmp (c1, c2)
int c1, c2;
{
static char s1[2], s2[2];
if (c1 == c2)
return (0);
if ( (isascii(c1) && isascii(c2))
|| (!isalpha(c1) && !isalpha(c2))
)
return (c1 - c2);
if (isalpha(c1) && !isalpha(c2)) {
if (isupper(c1))
return ('A' - c2);
else
return ('a' - c2);
} else if (isalpha(c2) && !isalpha(c1)) {
if (isupper(c2))
return (c1 - 'A');
else
return (c1 - 'a');
}
if (isupper(c1) && islower(c2))
return (-1);
else if (islower(c1) && isupper(c2))
return (1);
s1[0] = c1;
s2[0] = c2;
return strcoll(s1, s2);
}
/*
- p_b_term - parse one term of a bracketed character list
== static void p_b_term(register struct parse *p, register cset *cs);
@ -799,10 +831,19 @@ register cset *cs;
finish = p_b_symbol(p);
} else
finish = start;
/* xxx what about signed chars here... */
(void)REQUIRE(start <= finish, REG_ERANGE);
for (i = start; i <= finish; i++)
CHadd(cs, i);
if (start == finish)
CHadd(cs, start);
else {
uch s = (uch)start, f = (uch)finish;
(void)REQUIRE(collcmp(s, f) <= 0, REG_ERANGE);
for (i = CHAR_MIN; i <= CHAR_MAX; i++) {
if ( collcmp(s, (uch)i) <= 0
&& collcmp((uch)i, f) <= 0
)
CHadd(cs, i);
}
}
break;
}
}