2007-03-17 17:18:49 +01:00
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/************************************************************************
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2009-12-14 21:51:11 +01:00
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* lib/lib_strerror.c
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2007-03-17 17:18:49 +01:00
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*
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2009-12-14 21:51:11 +01:00
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
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2007-03-17 17:18:49 +01:00
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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2009-12-14 21:51:11 +01:00
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* 3. Neither the name NuttX nor the names of its contributors may be
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2007-03-17 17:18:49 +01:00
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <nuttx/config.h>
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2009-12-14 21:51:11 +01:00
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#include <stdint.h>
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2007-03-17 17:18:49 +01:00
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#include <string.h>
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#include <errno.h>
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/************************************************************************
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* Definitions
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************************************************************************/
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/************************************************************************
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* Private Types
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************************************************************************/
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struct errno_strmap_s
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{
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2009-12-14 21:51:11 +01:00
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uint8_t errnum;
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2007-03-17 17:18:49 +01:00
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const char *str;
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};
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/************************************************************************
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* Private Data
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************************************************************************/
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/* This table maps all error numbers to descriptive strings.
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* The only assumption that the code makes with regard to this
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* this table is that it is order by error number.
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*
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* The size of this table is quite large. Its size can be
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* reduced by eliminating some of the more obscure error
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* strings.
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*/
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struct errno_strmap_s g_errnomap[] =
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{
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{ EPERM, EPERM_STR },
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{ ENOENT, ENOENT_STR },
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{ ESRCH, ESRCH_STR },
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{ EINTR, EINTR_STR },
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{ EIO, EIO_STR },
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{ ENXIO, ENXIO_STR },
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{ E2BIG, E2BIG_STR },
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{ ENOEXEC, ENOEXEC_STR },
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{ EBADF, EBADF_STR },
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{ ECHILD, ECHILD_STR },
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{ EAGAIN, EAGAIN_STR },
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{ ENOMEM, ENOMEM_STR },
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{ EACCES, EACCES_STR },
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{ EFAULT, EFAULT_STR },
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{ ENOTBLK, ENOTBLK_STR },
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{ EBUSY, EBUSY_STR },
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{ EEXIST, EEXIST_STR },
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{ EXDEV, EXDEV_STR },
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{ ENODEV, ENODEV_STR },
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{ ENOTDIR, ENOTDIR_STR },
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{ EISDIR, EISDIR_STR },
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{ EINVAL, EINVAL_STR },
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{ ENFILE, ENFILE_STR },
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{ EMFILE, EMFILE_STR },
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{ ENOTTY, ENOTTY_STR },
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{ ETXTBSY, ETXTBSY_STR },
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{ EFBIG, EFBIG_STR },
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{ ENOSPC, ENOSPC_STR },
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{ ESPIPE, ESPIPE_STR },
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{ EROFS, EROFS_STR },
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{ EMLINK, EMLINK_STR },
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{ EPIPE, EPIPE_STR },
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{ EDOM, EDOM_STR },
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{ ERANGE, ERANGE_STR },
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{ EDEADLK, EDEADLK_STR },
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{ ENAMETOOLONG, ENAMETOOLONG_STR },
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{ ENOLCK, ENOLCK_STR },
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{ ENOSYS, ENOSYS_STR },
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{ ENOTEMPTY, ENOTEMPTY_STR },
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{ ELOOP, ELOOP_STR },
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{ ENOMSG, ENOMSG_STR },
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{ EIDRM, EIDRM_STR },
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{ ECHRNG, ECHRNG_STR },
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{ EL2NSYNC, EL2NSYNC_STR },
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{ EL3HLT, EL3HLT_STR },
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{ EL3RST, EL3RST_STR },
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{ ELNRNG, ELNRNG_STR },
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{ EUNATCH, EUNATCH_STR },
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{ ENOCSI, ENOCSI_STR },
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{ EL2HLT, EL2HLT_STR },
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{ EBADE, EBADE_STR },
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{ EBADR, EBADR_STR },
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{ EXFULL, EXFULL_STR },
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{ ENOANO, ENOANO_STR },
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{ EBADRQC, EBADRQC_STR },
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{ EBADSLT, EBADSLT_STR },
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{ EBFONT, EBFONT_STR },
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{ ENOSTR, ENOSTR_STR },
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{ ENODATA, ENODATA_STR },
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{ ETIME, ETIME_STR },
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{ ENOSR, ENOSR_STR },
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{ ENONET, ENONET_STR },
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{ ENOPKG, ENOPKG_STR },
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{ EREMOTE, EREMOTE_STR },
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{ ENOLINK, ENOLINK_STR },
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{ EADV, EADV_STR },
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{ ESRMNT, ESRMNT_STR },
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{ ECOMM, ECOMM_STR },
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{ EPROTO, EPROTO_STR },
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{ EMULTIHOP, EMULTIHOP_STR },
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{ EDOTDOT, EDOTDOT_STR },
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{ EBADMSG, EBADMSG_STR },
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{ EOVERFLOW, EOVERFLOW_STR },
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{ ENOTUNIQ, ENOTUNIQ_STR },
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{ EBADFD, EBADFD_STR },
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{ EREMCHG, EREMCHG_STR },
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{ ELIBACC, ELIBACC_STR },
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{ ELIBBAD, ELIBBAD_STR },
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{ ELIBSCN, ELIBSCN_STR },
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{ ELIBMAX, ELIBMAX_STR },
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{ ELIBEXEC, ELIBEXEC_STR },
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{ EILSEQ, EILSEQ_STR },
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{ ERESTART, ERESTART_STR },
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{ ESTRPIPE, ESTRPIPE_STR },
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{ EUSERS, EUSERS_STR },
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{ ENOTSOCK, ENOTSOCK_STR },
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{ EDESTADDRREQ, EDESTADDRREQ_STR },
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{ EMSGSIZE, EMSGSIZE_STR },
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{ EPROTOTYPE, EPROTOTYPE_STR },
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{ ENOPROTOOPT, ENOPROTOOPT_STR },
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{ EPROTONOSUPPORT, EPROTONOSUPPORT_STR },
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{ ESOCKTNOSUPPORT, ESOCKTNOSUPPORT_STR },
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{ EOPNOTSUPP, EOPNOTSUPP_STR },
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{ EPFNOSUPPORT, EPFNOSUPPORT_STR },
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{ EAFNOSUPPORT, EAFNOSUPPORT_STR },
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{ EADDRINUSE, EADDRINUSE_STR },
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{ EADDRNOTAVAIL, EADDRNOTAVAIL_STR },
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{ ENETDOWN, ENETDOWN_STR },
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{ ENETUNREACH, ENETUNREACH_STR },
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{ ENETRESET, ENETRESET_STR },
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{ ECONNABORTED, ECONNABORTED_STR },
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{ ECONNRESET, ECONNRESET_STR },
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{ ENOBUFS, ENOBUFS_STR },
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{ EISCONN, EISCONN_STR },
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{ ENOTCONN, ENOTCONN_STR },
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{ ESHUTDOWN, ESHUTDOWN_STR },
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{ ETOOMANYREFS, ETOOMANYREFS_STR },
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{ ETIMEDOUT, ETIMEDOUT_STR },
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{ ECONNREFUSED, ECONNREFUSED_STR },
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{ EHOSTDOWN, EHOSTDOWN_STR },
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{ EHOSTUNREACH, EHOSTUNREACH_STR },
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{ EALREADY, EALREADY_STR },
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{ EINPROGRESS, EINPROGRESS_STR },
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{ ESTALE, ESTALE_STR },
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{ EUCLEAN, EUCLEAN_STR },
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{ ENOTNAM, ENOTNAM_STR },
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{ ENAVAIL, ENAVAIL_STR },
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{ EISNAM, EISNAM_STR },
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{ EREMOTEIO, EREMOTEIO_STR },
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{ EDQUOT, EDQUOT_STR },
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{ ENOMEDIUM, ENOMEDIUM_STR },
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{ EMEDIUMTYPE, EMEDIUMTYPE_STR }
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};
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#define NERRNO_STRS (sizeof(g_errnomap) / sizeof(struct errno_strmap_s))
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/************************************************************************
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* Private Functions
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************************************************************************/
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/************************************************************************
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* Public Functions
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************************************************************************/
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/************************************************************************
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* Name: strerror
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************************************************************************/
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const char *strerror(int errnum)
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{
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int ndxlow = 0;
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int ndxhi = NERRNO_STRS - 1;
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int ndxmid;
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do
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{
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ndxmid = (ndxlow + ndxhi) >> 1;
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if (errnum > g_errnomap[ndxmid].errnum)
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{
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ndxlow = ndxmid + 1;
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}
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else if (errnum < g_errnomap[ndxmid].errnum)
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{
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ndxhi = ndxmid - 1;
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}
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else
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{
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return g_errnomap[ndxmid].str;
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}
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}
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while (ndxlow <= ndxhi);
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return "Unknown error";
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}
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