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Diffstat (limited to 'src/ctype.c')
| -rw-r--r-- | src/ctype.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/src/ctype.c b/src/ctype.c new file mode 100644 index 0000000..522a799 --- /dev/null +++ b/src/ctype.c @@ -0,0 +1,268 @@ +/** + * 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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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. + * + * @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 unspecifed + * of the character is not alphabetical. + * You should consider running + * `(isupper(c) ? tolower(c) : c)` instead. + * + * @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 unspecifed + * of the character is not alphabetical. + * You should consider running + * `(isupper(c) ? tolower(c) : c)` instead. + * + * @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. + * + * @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. + * + * @param c The character. + * @param c 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); +} + |