diff options
Diffstat (limited to 'lib/userspec.c')
| -rw-r--r-- | lib/userspec.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/lib/userspec.c b/lib/userspec.c index cb1f8a73f..fe2596858 100644 --- a/lib/userspec.c +++ b/lib/userspec.c @@ -1,5 +1,5 @@ /* userspec.c -- Parse a user and group string. - Copyright (C) 1989-1992, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1989-1992, 1997, 1998, 2000 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -83,7 +83,15 @@ struct group *getgrgid (); } \ while (0) -#define isdigit(c) ((c) >= '0' && (c) <= '9') +/* ISDIGIT differs from isdigit, as follows: + - Its arg may be any int or unsigned int; it need not be an unsigned char. + - It's guaranteed to evaluate its argument exactly once. + - It's typically faster. + Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that + only '0' through '9' are digits. Prefer ISDIGIT to isdigit unless + it's important to use the locale's definition of `digit' even when the + host does not conform to Posix. */ +#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) #ifndef strdup char *strdup (); @@ -96,7 +104,7 @@ static int is_number (const char *str) { for (; *str; str++) - if (!isdigit (*str)) + if (!ISDIGIT (*str)) return 0; return 1; } |