diff options
Diffstat (limited to 'libio/dbz/case.h')
| -rw-r--r-- | libio/dbz/case.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libio/dbz/case.h b/libio/dbz/case.h new file mode 100644 index 00000000000..d5ef6961550 --- /dev/null +++ b/libio/dbz/case.h @@ -0,0 +1,12 @@ +extern int cistrncmp(); +extern char *rfc822ize(); + +extern char casemap[]; + +/* must call cistrncmp before invoking TOLOW... */ +#define TOLOW(c) (casemap[(c)+128]) /* see case.c for why 128 */ + +/* ...but the use of it in CISTREQN is safe without the preliminary call (!) */ +/* CISTREQN is an optimised case-insensitive strncmp(a,b,n)==0; n > 0 */ +#define CISTREQN(a, b, n) \ + (TOLOW((a)[0]) == TOLOW((b)[0]) && cistrncmp(a, b, n) == 0) |