os-k/kaleid/libc/ctype.c

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//----------------------------------------------------------------------------//
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// OS on Kaleid //
// //
// Desc: Character types //
// //
// //
// Copyright © 2018-2020 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
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#include <libc.h>
#define SH(x) (1 << x)
enum
{
CT = SH(0), // control
PR = SH(1), // printing
GR = SH(2)|PR, // graphical
DX = SH(3)|GR, // hex digit
DG = SH(4)|DX, // decimal digit
SP = SH(5), // space
BK = SH(6)|SP, // blank
PT = SH(7)|GR, // punctuation
AL = SH(8)|GR, // alpha
UP = SH(9)|AL, // upper alpha
LW = SH(10)|AL // lower alpha
};
int __ctype[] = {
// ASCII ctype table
/* 0 */ CT, CT, CT, CT, CT, CT, CT, CT, CT, BK|CT,
/* 10 */ SP|CT, SP|CT, SP|CT, SP|CT, CT, CT, CT, CT, CT, CT,
/* 20 */ CT, CT, CT, CT, CT, CT, CT, CT, CT, CT,
/* 30 */ CT, CT, BK|PR, PT, PT, PT, PT, PT, PT, PT,
/* 40 */ PT, PT, PT, PT, PT, PT, PT, PT, DG, DG,
/* 50 */ DG, DG, DG, DG, DG, DG, DG, DG, PT, PT,
/* 60 */ PT, PT, PT, PT, PT, UP|DX, UP|DX, UP|DX, UP|DX, UP|DX,
/* 70 */ UP|DX, UP, UP, UP, UP, UP, UP, UP, UP, UP,
/* 80 */ UP, UP, UP, UP, UP, UP, UP, UP, UP, UP,
/* 90 */ UP, PT, PT, PT, PT, PT, PT, LW|DX, LW|DX, LW|DX,
/* 100 */ LW|DX, LW|DX, LW|DX, LW, LW, LW, LW, LW, LW, LW,
/* 110 */ LW, LW, LW, LW, LW, LW, LW, LW, LW, LW,
/* 120 */ LW, LW, LW, PT, PT, PT, PT, CT,
};
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static_assert(sizeof(__ctype) == 128 * sizeof(int),
"ctype table: invalid size");
int tolower(int c)
{
if (isupper(c)) return c + ('a' - 'A');
return c;
}
int toupper(int c)
{
if (islower(c)) return c - ('a' - 'A');
return c;
}