std: add ascii with C ASCII character classes

Does NOT look at the locale the way the C functions do.

       int isalnum(int c);
       int isalpha(int c);
       int iscntrl(int c);
       int isdigit(int c);
       int isgraph(int c);
       int islower(int c);
       int isprint(int c);
       int ispunct(int c);
       int isspace(int c);
       int isupper(int c);
       int isxdigit(int c);

       int isascii(int c);
       int isblank(int c);

       int toupper(int c);
       int tolower(int c);

Tested to match glibc (when using C locale) with this program:

const c = @cImport({
    // See https://github.com/ziglang/zig/issues/515
    @cDefine("_NO_CRT_STDIO_INLINE", "1");
    @cInclude("stdio.h");
    @cInclude("string.h");
    @cInclude("ctype.h");
});

const std = @import("std");
const ascii = std.ascii;
const abort = std.os.abort;

export fn main(argc: c_int, argv: **u8) c_int {
    var i: u8 = undefined;
    i = 0;
    while (true) {
        if (ascii.isAlNum(i) != (c.isalnum(i) > 0)) { abort(); }
        if (ascii.isAlpha(i) != (c.isalpha(i) > 0)) { abort(); }
        if (ascii.isCtrl(i) != (c.iscntrl(i) > 0)) { abort(); }
        if (ascii.isDigit(i) != (c.isdigit(i) > 0)) { abort(); }
        if (ascii.isGraph(i) != (c.isgraph(i) > 0)) { abort(); }
        if (ascii.isLower(i) != (c.islower(i) > 0)) { abort(); }
        if (ascii.isPrint(i) != (c.isprint(i) > 0)) { abort(); }
        if (ascii.isPunct(i) != (c.ispunct(i) > 0)) { abort(); }
        if (ascii.isSpace(i) != (c.isspace(i) > 0)) { abort(); }
        if (ascii.isUpper(i) != (c.isupper(i) > 0)) { abort(); }
        if (ascii.isXDigit(i) != (c.isxdigit(i) > 0)) { abort(); }
        if (i == 255) { break; }
        i += 1;
    }

    _ = c.printf(c"Success!\n");
    return 0;
}

0 files changed, 0 insertions, 0 deletions