/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* 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
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <ctype.h>
/**
* Check whether a character is an alphabetical
* character or a decimal digit.
*
* @etymology (Is) character either (al)phabetical or (num)erical [(al)pha(num)erical]?
*
* @param c The character.
* @return Whether the character is in
* ['0', '9'], ['A', 'Z'], or ['a', 'z'].
*/
int (isalnum)(int c)
{
return isalnum(c);
}
/**
* Check whether a character is an alphabetical character.
*
* @etymology (Is) character (alpha)betical?
*
* @param c The character.
* @return Whether the character is in
* ['A', 'Z'] or ['a', 'z'].
*/
int (isalpha)(int c)
{
return isalpha(c);
}
/**
* Check whether a character is a regular blank space
* or a horizontal tabulation.
*
* @etymology (Is) character a (blank) space?
*
* @param c The character.
* @return Whether the character is a ' ' or a '\t'.
*/
int (isblank)(int c)
{
return isblank(c);
}
/**
* Check whether a character is a non-printable
* ASCII character.
*
* @etymology (Is) character a (c)o(ntr)o(l) character?
*
* @param c The character.
* @return Whether the character is lower than ' '.
*/
int (iscntrl)(int c)
{
return iscntrl(c);
}
/**
* Check whether a character is a decimal digit.
*
* @etymology (Is) character a (digit)?
*
* @param c The character.
* @return Whether the character is in ['0', '9'].
*/
int (isdigit)(int c)
{
return isdigit(c);
}
/**
* Check whether a character is has a printable glyph.
*
* @etymology (Is) character (graph)ical?
*
* @param c The character.
* @return Whether the character is greater than ' '.
*/
int (isgraph)(int c)
{
return isgraph(c);
}
/**
* Check whether a character is a lowercase
* alphabetical character.
*
* @etymology (Is) character a (lower)case character?
*
* @param c The character.
* @return Whether the character is in ['a', 'z'].
*/
int (islower)(int c)
{
return islower(c);
}
/**
* Check whether a character is has a printable glyph
* or a blank space.
*
* @etymology (Is) character (print)able?
*
* @param c The character.
* @return Whether the character is at least
* as great as ' '.
*/
int (isprint)(int c)
{
return isprint(c);
}
/**
* Check whether a character is has a punctuation,
* that is, a printable character but a blank space,
* numerical or alphabetical.
*
* @etymology (Is) character a (punct)uation?
*
* @param c The character.
* @return Whether the character is a punctuation.
*/
int (ispunct)(int c)
{
return ispunct(c);
}
/**
* Check whether a character is a whitespace character.
*
* @etymology (Is) character white(space)?
*
* @param c The character.
* @return Whether the character is a ' ', '\f',
* '\n', '\r', '\t', or '\v'.
*/
int (isspace)(int c)
{
return isspace(c);
}
/**
* Check whether a character is an uppercase
* alphabetical character.
*
* @etymology (Is) character a (upper)case character?
*
* @param c The character.
* @return Whether the character is in ['A', 'Z'].
*/
int (isupper)(int c)
{
return isupper(c);
}
/**
* Check whether a character is an ASCII
* hexadecimal digit. Both uppercase and
* lowercase is supported.
*
* @etymology (Is) character a he(x)adecimal digit?
*
* @param c The character.
* @return Whether the character is in
* ['0', '9'], ['A', 'Z'], or ['a', 'z'].
*/
int (isxdigit)(int c)
{
return isxdigit(c);
}
/**
* Convert a uppercase ASCII character to
* an lowercase ASCII character.
*
* The function's behaviour is unspecified
* of the character is not alphabetical.
* You should consider running
* `(isupper(c) ? tolower(c) : c)` instead.
*
* @etymology Convert character (to) (lower)case!
*
* @param c The character.
* @return The character in lowercase.
* Guaranteed to be unchanged if the
* character already is in lowercase.
*/
int (tolower)(int c)
{
return tolower(c);
}
/**
* Convert a lowercase ASCII character to
* an uppercase ASCII character.
*
* The function's behaviour is unspecified
* of the character is not alphabetical.
* You should consider running
* `(isupper(c) ? tolower(c) : c)` instead.
*
* @etymology Convert character (to) (upper)case!
*
* @param c The character.
* @return The character in uppercase.
* Guaranteed to be unchanged if the
* character already is in lowercase.
*/
int (toupper)(int c)
{
return toupper(c);
}
/**
* Check whether a character is an ASCII character.
*
* @etymology (Is) character an (ASCII) character?
*
* @param c The character
* @return Whether the character is an ASCII character.
*/
int (isascii)(int c)
{
return isascii(c);
}
/**
* Remove the 8:th bit from a character.
*
* Note that this does not make a proper character set
* convertion and the result is virtually arbitrary.
*
* Justification for existence:
* The highest bit has historically been used as a
* parity bit.
*
* @etymology Truncate character (to) fit (ASCII) character set!
*
* @param c The character.
* @return The character with the 8:th bit cleared.
*/
int (toascii)(int c)
{
return c & 0x7F;
}
/**
* This function is identical to `tolower`.
* It is provided for backwards-compatibility with SVID.
*/
int _tolower(int c)
{
return tolower(c);
}
/**
* This function is identical to `tolower`.
* It is provided for backwards-compatibility with SVID.
*/
int _toupper(int c)
{
return toupper(c);
}
/**
* Create a variant, with specifiable locale,
* of one of the functions.
*
* @param The name of the function without the `_l`-suffix.
*/
#define CTYPE_LOCALE(F) \
int F##_l(int c, locale_t locale) \
{ \
return F(c); \
(void) locale; \
}
CTYPE_LOCALE(isalnum)
CTYPE_LOCALE(isalpha)
CTYPE_LOCALE(isblank)
CTYPE_LOCALE(iscntrl)
CTYPE_LOCALE(isdigit)
CTYPE_LOCALE(isgraph)
CTYPE_LOCALE(islower)
CTYPE_LOCALE(isprint)
CTYPE_LOCALE(ispunct)
CTYPE_LOCALE(isspace)
CTYPE_LOCALE(isupper)
CTYPE_LOCALE(isxdigit)
CTYPE_LOCALE(isascii)
CTYPE_LOCALE(toascii)
CTYPE_LOCALE(tolower)
CTYPE_LOCALE(toupper)
