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Add support for rfc3454 casemapping

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Obviously this has less than ideal performance but it should at least be correct
This commit is contained in:
Patrick Griffis 2016-02-25 14:59:09 -05:00
parent df36f88e88
commit 4fe7d06811
3 changed files with 31 additions and 1 deletions
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4
src/common/modes.c
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@ -840,7 +840,9 @@ inbound_005 (server * serv, char *word[], const message_tags_data *tags_data)
} else if (strncmp (word[w], "CASEMAPPING=", 12) == 0)
{
if (strcmp (word[w] + 12, "ascii") == 0) /* bahamut */
serv->p_cmp = (void *)g_ascii_strcasecmp;
serv->p_cmp = g_ascii_strcasecmp;
else if (strcmp (word[w] + 12, "rfc3454") == 0)
serv->p_cmp = rfc3454_casecmp;
} else if (strncmp (word[w], "CHARSET=", 8) == 0)
{
if (g_ascii_strncasecmp (word[w] + 8, "UTF-8", 5) == 0)

27
src/common/util.c
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@ -1018,6 +1018,33 @@ make_ping_time (void)
return (timev.tv_sec - 50000) * 1000 + timev.tv_usec/1000;
}
/*
* https://tools.ietf.org/html/rfc3454
*/
int
rfc3454_casecmp (const char *s1, const char *s2)
{
char *s1_lower, *s2_lower, *s1_normal, *s2_normal;
int ret;
if (strcmp (s1, s2) == 0)
return 0; /* Exact same already */
s1_lower = g_utf8_casefold(s1, -1);
s2_lower = g_utf8_casefold(s2, -1);
s1_normal = g_utf8_normalize(s1_lower, -1, G_NORMALIZE_NFKC);
s2_normal = g_utf8_normalize(s2_lower, -1, G_NORMALIZE_NFKC);
ret = strcmp (s1_normal, s2_normal);
g_free (s1_normal);
g_free (s2_normal);
g_free (s1_lower);
g_free (s2_lower);
return ret;
}
/************************************************************************
* This technique was borrowed in part from the source code to

1
src/common/util.h
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@ -44,6 +44,7 @@ char *file_part (char *file);
void for_files (char *dirname, char *mask, void callback (char *file));
int rfc_casecmp (const char *, const char *);
int rfc_ncasecmp (char *, char *, int);
int rfc3454_casecmp (const char *s1, const char *s2) G_GNUC_PURE;
int buf_get_line (char *, char **, int *, int len);
char *nocasestrstr (const char *text, const char *tofind);
char *country (char *);