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Convert sindex() and rsindex() to use const char * arguments

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Also simply sindex() considerably using standard strspn() / strcspn() functions.
This commit is contained in:
Kevin Easton
2017-11-17 12:21:12 +11:00
parent fea88185f8
commit e8ce5fb973
3 changed files with 34 additions and 40 deletions
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66
source/ircaux.c
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@@ -1066,53 +1066,47 @@ char *BX_check_nickname (char *nick)
return *nick ? nick : NULL;
}
/*
* sindex: much like index(), but it looks for a match of any character in
* the group, and returns that position. If the first character is a ^, then
* this will match the first occurrence not in that group.
/* sindex()
*
* Returns a pointer to the first matching character in a string, or NULL if
* there are no matching characters.
*
* A matching character is any character in 'group', unless the first
* character of 'group' is a ^, in which case a matching character is any
* character NOT in 'group'.
*/
char *BX_sindex (register char *string, char *group)
char *BX_sindex(const char *string, const char *group)
{
char *ptr;
if (!string || !group)
return (char *) NULL;
return NULL;
if (*group == '^')
{
group++;
for (; *string; string++)
{
for (ptr = group; *ptr; ptr++)
{
if (*ptr == *string)
break;
}
if (*ptr == '\0')
return string;
}
string += strspn(string, group + 1);
}
else
{
for (; *string; string++)
{
for (ptr = group; *ptr; ptr++)
{
if (*ptr == *string)
return string;
}
}
string += strcspn(string, group);
}
return (char *) NULL;
if (*string)
return (char *)string;
else
return NULL;
}
/*
* rsindex: much like rindex(), but it looks for a match of any character in
* the group, and returns that position. If the first character is a ^, then
* this will match the first occurrence not in that group.
/* rsindex()
*
* Returns a pointer to the howmany'th last matching character in a string, or
* NULL if there are less than howmany matching characters. Returns NULL
* if howmany is zero.
*
* A matching character is any character in 'group', unless the first character of 'group'
* is a ^, in which case a matching character is any character NOT in 'group'.
*/
char *BX_rsindex (register char *string, char *start, char *group, int howmany)
char *BX_rsindex(const char *string, const char *start, const char *group, int howmany)
{
register char *ptr;
const char *ptr;
if (howmany && string && start && group && start <= string)
{
@@ -1124,7 +1118,7 @@ char *BX_rsindex (register char *string, char *start, char *group, int howmany)
if (!strchr(group, *ptr))
{
if (--howmany == 0)
return ptr;
return (char *)ptr;
}
}
}
@@ -1135,7 +1129,7 @@ char *BX_rsindex (register char *string, char *start, char *group, int howmany)
if (strchr(group, *ptr))
{
if (--howmany == 0)
return ptr;
return (char *)ptr;
}
}
}