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237 lines
9.7 KiB
237 lines
9.7 KiB
/************************************************************************ |
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* lib/string/lib_strerror.c |
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* |
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* Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved. |
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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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* 3. Neither the name NuttX nor the names of its contributors may be |
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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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#include <stdint.h> |
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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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uint8_t errnum; |
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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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