Hi Nguyen.

I just had a need for isprint() myself, and then I found
your code here.

I had a look at the POSIX locale as describe here:

http://sourceware.org/git/?p=glibc.git;a=blob;f=localedata/locales/POSIX

Some remarks below.

Am 14.10.2012 16:26, schrieb Nguyen Thai Ngoc Duy:
> -- 8< --
> diff --git a/ctype.c b/ctype.c
> index faeaf34..0bfebb4 100644
> --- a/ctype.c
> +++ b/ctype.c
> @@ -11,18 +11,21 @@ enum {
>       D = GIT_DIGIT,
>       G = GIT_GLOB_SPECIAL,   /* *, ?, [, \\ */
>       R = GIT_REGEX_SPECIAL,  /* $, (, ), +, ., ^, {, | */
> -     P = GIT_PATHSPEC_MAGIC  /* other non-alnum, except for ] and } */
> +     P = GIT_PATHSPEC_MAGIC, /* other non-alnum, except for ] and } */
> +     X = GIT_CNTRL,
> +     U = GIT_PUNCT,
> +     Z = GIT_CNTRL | GIT_SPACE
>  };
>  
>  const unsigned char sane_ctype[256] = {
> -     0, 0, 0, 0, 0, 0, 0, 0, 0, S, S, 0, 0, S, 0, 0,         /*   0.. 15 */
> -     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,         /*  16.. 31 */
> +     X, X, X, X, X, X, X, X, X, Z, Z, X, X, Z, X, X,         /*   0.. 15 */
> +     X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X,         /*  16.. 31 */

"Normal" isspace() also includes vertical tab (11) and form-feed (12) as
white-space characters. Is there a reason, why they are not included here?

>       S, P, P, P, R, P, P, P, R, R, G, R, P, P, R, P,         /*  32.. 47 */
>       D, D, D, D, D, D, D, D, D, D, P, P, P, P, P, G,         /*  48.. 63 */
>       P, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,         /*  64.. 79 */
> -     A, A, A, A, A, A, A, A, A, A, A, G, G, 0, R, P,         /*  80.. 95 */
> +     A, A, A, A, A, A, A, A, A, A, A, G, G, U, R, P,         /*  80.. 95 */
>       P, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,         /*  96..111 */
> -     A, A, A, A, A, A, A, A, A, A, A, R, R, 0, P, 0,         /* 112..127 */
> +     A, A, A, A, A, A, A, A, A, A, A, R, R, U, P, X,         /* 112..127 */
>       /* Nothing in the 128.. range */
>  };
>  
> diff --git a/git-compat-util.h b/git-compat-util.h
> index f8b859c..db77f3e 100644
> --- a/git-compat-util.h
> +++ b/git-compat-util.h
[...]
> @@ -527,6 +533,13 @@ extern const unsigned char sane_ctype[256];
>  #define isupper(x) sane_iscase(x, 0)
>  #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
>  #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | 
> GIT_REGEX_SPECIAL)
> +#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
> +#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
> +             GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
> +#define isxdigit(x) (hexval_table[x] != -1)
> +#define isprint(x) (sane_istest(x, GIT_ALPHA | GIT_DIGIT | GIT_SPACE | \
> +             GIT_PUNCT | GIT_REGEX_SPECIAL | GIT_GLOB_SPECIAL | \
> +             GIT_PATHSPEC_MAGIC))

"Normal" isprint() only includes space (32) from the white-space characters.
The other white-space characters are not considered printable.

Do we want to stay close to the "original", or not?

Regards
Jan

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