/* * Copyright (c) 2010 Martin Decky * Copyright (c) 2017 CZ.NIC, z.s.p.o. * 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. */ #include <str_error.h> #include <errno.h> #include <stddef.h> /* * The arrays below are automatically generated from the same file that * errno.h constants are generated from. Triple-include of the same list * with redefinitions of __errno() macro are used to ensure that the * information cannot get out of synch. This is inpired by musl libc. */ #undef __errno_entry #define __errno_entry(name, num, desc) name, static const errno_t err_num[] = { #include <abi/errno.in> }; #undef __errno_entry #define __errno_entry(name, num, desc) #name, static const char *err_name[] = { #include <abi/errno.in> }; #undef __errno_entry #define __errno_entry(name, num, desc) "[" #name "] " desc, static const char *err_desc[] = { #include <abi/errno.in> }; /* Returns index corresponding to the given errno, or -1 if not found. */ static int find_errno(errno_t e) { /* * Just a dumb linear search. * There are too few entries to warrant anything smarter. */ int len = sizeof(err_num) / sizeof(errno_t); for (int i = 0; i < len; i++) { if (err_num[i] == e) { return i; } } return -1; } const char *str_error_name(errno_t e) { int i = find_errno(e); if (i >= 0) { return err_name[i]; } return NULL; } const char *str_error(errno_t e) { int i = find_errno(e); if (i >= 0) { return err_desc[i]; } return NULL; }