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| author | Jakob Kaivo <jkk@ung.org> | 2019-03-02 11:33:02 -0500 |
|---|---|---|
| committer | Jakob Kaivo <jkk@ung.org> | 2019-03-02 11:33:02 -0500 |
| commit | f7afd7bc9c759650c1b52ee6ff0c8f2956297056 (patch) | |
| tree | 4ac4834972dc7601476a4f3d7e336605ecf6d01b /src/ctype/isxdigit.c | |
| parent | c22a0473c06092a41fb728ce668572082bb50636 (diff) | |
clean up documentation
Diffstat (limited to 'src/ctype/isxdigit.c')
| -rw-r--r-- | src/ctype/isxdigit.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/ctype/isxdigit.c b/src/ctype/isxdigit.c index 30ddd618..a17657fa 100644 --- a/src/ctype/isxdigit.c +++ b/src/ctype/isxdigit.c @@ -4,15 +4,13 @@ #include "nonstd/ctype.h" /** test whether a character is a hexadecimal digit **/ + int isxdigit(int c) { unsigned int *map = __libc(CTYPE); ASSERT_REPRESENTABLE(c, 0, UCHAR_MAX, unsigned char, EOF); - /* - RETURN(NONZERO, ARGUMENT(c) is a hexadecimal digit); - RETURN(0, ARGUMENT(c) is not a hexadecimal digit); - */ + return map[c] & CT_XDIGIT; } @@ -22,6 +20,8 @@ in the current locale. ***/ /* +RETURN(NONZERO, ARGUMENT(c) is a hexadecimal digit) +RETURN(0, ARGUMENT(c) is not a hexadecimal digit) LC_CTYPE C_LOCALE(`THIS() is true for the characters CHAR(0), CHAR(1), CHAR(2), CHAR(3), CHAR(4), CHAR(5), CHAR(6), CHAR(7), CHAR(8), CHAR(9), CHAR(a), CHAR(b), CHAR(c), CHAR(d), CHAR(e), CHAR(f), CHAR(A), CHAR(B), CHAR(C), CHAR(D), CHAR(E), and CHAR(F)') STDC(1) |