/* * Copyright (c) 2006 Josef Cejka * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libc * @{ */ /** @file */ #include <ctype.h> int islower(int c) { return ((c >= 'a') && (c <= 'z')); } int isupper(int c) { return ((c >= 'A') && (c <= 'Z')); } int isalpha(int c) { return (islower(c) || isupper(c)); } int isdigit(int c) { return ((c >= '0') && (c <= '9')); } int isalnum(int c) { return (isalpha(c) || isdigit(c)); } int isblank(int c) { return c == ' ' || c == '\t'; } int iscntrl(int c) { return (c >= 0 && c < 0x20) || c == 0x7E; } int isprint(int c) { return c >= 0 && c < 0x80 && !iscntrl(c); } int isgraph(int c) { return isprint(c) && c != ' '; } int isspace(int c) { switch (c) { case ' ': case '\n': case '\t': case '\f': case '\r': case '\v': return 1; default: return 0; } } int ispunct(int c) { return !isspace(c) && !isalnum(c) && isprint(c); } int isxdigit(int c) { return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'); } int tolower(int c) { if (isupper(c)) return (c + ('a' - 'A')); else return c; } int toupper(int c) { if (islower(c)) return (c + ('A' - 'a')); else return c; } /** @} */