/************************************************************************ * lib/string/lib_strerror.c * * Copyright (C) 2007, 2009, 2011-2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "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 * COPYRIGHT OWNER OR CONTRIBUTORS 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. * ************************************************************************/ /************************************************************************ * Included Files ************************************************************************/ #include #include #include #include /************************************************************************ * Definitions ************************************************************************/ /************************************************************************ * Private Types ************************************************************************/ struct errno_strmap_s { uint8_t errnum; const char *str; }; /************************************************************************ * Private Data ************************************************************************/ #ifdef CONFIG_LIBC_STRERROR /* This table maps all error numbers to descriptive strings. * The only assumption that the code makes with regard to this * this table is that it is ordered by error number. * * The size of this table is quite large. Its size can be * reduced by eliminating some of the more obscure error * strings. */ #ifndef CONFIG_LIBC_STRERROR_SHORT static const struct errno_strmap_s g_errnomap[] = { { EPERM, EPERM_STR }, { ENOENT, ENOENT_STR }, { ESRCH, ESRCH_STR }, { EINTR, EINTR_STR }, { EIO, EIO_STR }, { ENXIO, ENXIO_STR }, { E2BIG, E2BIG_STR }, { ENOEXEC, ENOEXEC_STR }, { EBADF, EBADF_STR }, { ECHILD, ECHILD_STR }, { EAGAIN, EAGAIN_STR }, { ENOMEM, ENOMEM_STR }, { EACCES, EACCES_STR }, { EFAULT, EFAULT_STR }, { ENOTBLK, ENOTBLK_STR }, { EBUSY, EBUSY_STR }, { EEXIST, EEXIST_STR }, { EXDEV, EXDEV_STR }, { ENODEV, ENODEV_STR }, { ENOTDIR, ENOTDIR_STR }, { EISDIR, EISDIR_STR }, { EINVAL, EINVAL_STR }, { ENFILE, ENFILE_STR }, { EMFILE, EMFILE_STR }, { ENOTTY, ENOTTY_STR }, { ETXTBSY, ETXTBSY_STR }, { EFBIG, EFBIG_STR }, { ENOSPC, ENOSPC_STR }, { ESPIPE, ESPIPE_STR }, { EROFS, EROFS_STR }, { EMLINK, EMLINK_STR }, { EPIPE, EPIPE_STR }, { EDOM, EDOM_STR }, { ERANGE, ERANGE_STR }, { EDEADLK, EDEADLK_STR }, { ENAMETOOLONG, ENAMETOOLONG_STR }, { ENOLCK, ENOLCK_STR }, { ENOSYS, ENOSYS_STR }, { ENOTEMPTY, ENOTEMPTY_STR }, { ELOOP, ELOOP_STR }, { ENOMSG, ENOMSG_STR }, { EIDRM, EIDRM_STR }, { ECHRNG, ECHRNG_STR }, { EL2NSYNC, EL2NSYNC_STR }, { EL3HLT, EL3HLT_STR }, { EL3RST, EL3RST_STR }, { ELNRNG, ELNRNG_STR }, { EUNATCH, EUNATCH_STR }, { ENOCSI, ENOCSI_STR }, { EL2HLT, EL2HLT_STR }, { EBADE, EBADE_STR }, { EBADR, EBADR_STR }, { EXFULL, EXFULL_STR }, { ENOANO, ENOANO_STR }, { EBADRQC, EBADRQC_STR }, { EBADSLT, EBADSLT_STR }, { EBFONT, EBFONT_STR }, { ENOSTR, ENOSTR_STR }, { ENODATA, ENODATA_STR }, { ETIME, ETIME_STR }, { ENOSR, ENOSR_STR }, { ENONET, ENONET_STR }, { ENOPKG, ENOPKG_STR }, { EREMOTE, EREMOTE_STR }, { ENOLINK, ENOLINK_STR }, { EADV, EADV_STR }, { ESRMNT, ESRMNT_STR }, { ECOMM, ECOMM_STR }, { EPROTO, EPROTO_STR }, { EMULTIHOP, EMULTIHOP_STR }, { EDOTDOT, EDOTDOT_STR }, { EBADMSG, EBADMSG_STR }, { EOVERFLOW, EOVERFLOW_STR }, { ENOTUNIQ, ENOTUNIQ_STR }, { EBADFD, EBADFD_STR }, { EREMCHG, EREMCHG_STR }, { ELIBACC, ELIBACC_STR }, { ELIBBAD, ELIBBAD_STR }, { ELIBSCN, ELIBSCN_STR }, { ELIBMAX, ELIBMAX_STR }, { ELIBEXEC, ELIBEXEC_STR }, { EILSEQ, EILSEQ_STR }, { ERESTART, ERESTART_STR }, { ESTRPIPE, ESTRPIPE_STR }, { EUSERS, EUSERS_STR }, { ENOTSOCK, ENOTSOCK_STR }, { EDESTADDRREQ, EDESTADDRREQ_STR }, { EMSGSIZE, EMSGSIZE_STR }, { EPROTOTYPE, EPROTOTYPE_STR }, { ENOPROTOOPT, ENOPROTOOPT_STR }, { EPROTONOSUPPORT, EPROTONOSUPPORT_STR }, { ESOCKTNOSUPPORT, ESOCKTNOSUPPORT_STR }, { EOPNOTSUPP, EOPNOTSUPP_STR }, { EPFNOSUPPORT, EPFNOSUPPORT_STR }, { EAFNOSUPPORT, EAFNOSUPPORT_STR }, { EADDRINUSE, EADDRINUSE_STR }, { EADDRNOTAVAIL, EADDRNOTAVAIL_STR }, { ENETDOWN, ENETDOWN_STR }, { ENETUNREACH, ENETUNREACH_STR }, { ENETRESET, ENETRESET_STR }, { ECONNABORTED, ECONNABORTED_STR }, { ECONNRESET, ECONNRESET_STR }, { ENOBUFS, ENOBUFS_STR }, { EISCONN, EISCONN_STR }, { ENOTCONN, ENOTCONN_STR }, { ESHUTDOWN, ESHUTDOWN_STR }, { ETOOMANYREFS, ETOOMANYREFS_STR }, { ETIMEDOUT, ETIMEDOUT_STR }, { ECONNREFUSED, ECONNREFUSED_STR }, { EHOSTDOWN, EHOSTDOWN_STR }, { EHOSTUNREACH, EHOSTUNREACH_STR }, { EALREADY, EALREADY_STR }, { EINPROGRESS, EINPROGRESS_STR }, { ESTALE, ESTALE_STR }, { EUCLEAN, EUCLEAN_STR }, { ENOTNAM, ENOTNAM_STR }, { ENAVAIL, ENAVAIL_STR }, { EISNAM, EISNAM_STR }, { EREMOTEIO, EREMOTEIO_STR }, { EDQUOT, EDQUOT_STR }, { ENOMEDIUM, ENOMEDIUM_STR }, { EMEDIUMTYPE, EMEDIUMTYPE_STR } }; #else /* CONFIG_LIBC_STRERROR_SHORT */ static const struct errno_strmap_s g_errnomap[] = { { EPERM, "EPERM" }, { ENOENT, "ENOENT" }, { ESRCH, "ESRCH" }, { EINTR, "EINTR" }, { EIO, "EIO" }, { ENXIO, "ENXIO" }, { E2BIG, "E2BIG" }, { ENOEXEC, "ENOEXEC" }, { EBADF, "EBADF" }, { ECHILD, "ECHILD" }, { EAGAIN, "EAGAIN" }, { ENOMEM, "ENOMEM" }, { EACCES, "EACCES" }, { EFAULT, "EFAULT" }, { ENOTBLK, "ENOTBLK" }, { EBUSY, "EBUSY" }, { EEXIST, "EEXIST" }, { EXDEV, "EXDEV" }, { ENODEV, "ENODEV" }, { ENOTDIR, "ENOTDIR" }, { EISDIR, "EISDIR" }, { EINVAL, "EINVAL" }, { ENFILE, "ENFILE" }, { EMFILE, "EMFILE" }, { ENOTTY, "ENOTTY" }, { ETXTBSY, "ETXTBSY" }, { EFBIG, "EFBIG" }, { ENOSPC, "ENOSPC" }, { ESPIPE, "ESPIPE" }, { EROFS, "EROFS" }, { EMLINK, "EMLINK" }, { EPIPE, "EPIPE" }, { EDOM, "EDOM" }, { ERANGE, "ERANGE" }, { EDEADLK, "EDEADLK" }, { ENAMETOOLONG, "ENAMETOOLONG" }, { ENOLCK, "ENOLCK" }, { ENOSYS, "ENOSYS" }, { ENOTEMPTY, "ENOTEMPTY" }, { ELOOP, "ELOOP" }, { ENOMSG, "ENOMSG" }, { EIDRM, "EIDRM" }, { ECHRNG, "ECHRNG" }, { EL2NSYNC, "EL2NSYNC" }, { EL3HLT, "EL3HLT" }, { EL3RST, "EL3RST" }, { EL3RST, "EL3RST" }, { EUNATCH, "EUNATCH" }, { ENOCSI, "ENOCSI" }, { EL2HLT, "EL2HLT" }, { EBADE, "EBADE" }, { EBADR, "EBADR" }, { EXFULL, "EXFULL" }, { ENOANO, "ENOANO" }, { EBADRQC, "EBADRQC" }, { EBADSLT, "EBADSLT" }, { EBFONT, "EBFONT" }, { ENOSTR, "ENOSTR" }, { ENODATA, "ENODATA" }, { ETIME, "ETIME" }, { ENOSR, "ENOSR" }, { ENONET, "ENONET" }, { ENOPKG, "ENOPKG" }, { EREMOTE, "EREMOTE" }, { ENOLINK, "ENOLINK" }, { EADV, "EADV" }, { ESRMNT, "ESRMNT" }, { ECOMM, "ECOMM" }, { EPROTO, "EPROTO" }, { EMULTIHOP, "EMULTIHOP" }, { EDOTDOT, "EDOTDOT" }, { EBADMSG, "EBADMSG" }, { EOVERFLOW, "EOVERFLOW" }, { ENOTUNIQ, "ENOTUNIQ" }, { EBADFD, "EBADFD" }, { EREMCHG, "EREMCHG" }, { ELIBACC, "ELIBACC" }, { ELIBBAD, "ELIBBAD" }, { ELIBSCN, "ELIBSCN" }, { ELIBMAX, "ELIBMAX" }, { ELIBEXEC, "ELIBEXEC" }, { EILSEQ, "EILSEQ" }, { ERESTART, "ERESTART" }, { ESTRPIPE, "ESTRPIPE" }, { EUSERS, "EUSERS" }, { ENOTSOCK, "ENOTSOCK" }, { EDESTADDRREQ, "EDESTADDRREQ" }, { EMSGSIZE, "EMSGSIZE" }, { EPROTOTYPE, "EPROTOTYPE" }, { ENOPROTOOPT, "ENOPROTOOPT" }, { EPROTONOSUPPORT, "EPROTONOSUPPORT" }, { ESOCKTNOSUPPORT, "ESOCKTNOSUPPORT" }, { EOPNOTSUPP, "EOPNOTSUPP" }, { EPFNOSUPPORT, "EPFNOSUPPORT" }, { EAFNOSUPPORT, "EAFNOSUPPORT" }, { EADDRINUSE, "EADDRINUSE" }, { EADDRNOTAVAIL, "EADDRNOTAVAIL" }, { ENETDOWN, "ENETDOWN" }, { ENETUNREACH, "ENETUNREACH" }, { ENETRESET, "ENETRESET" }, { ECONNABORTED, "ECONNABORTED" }, { ECONNRESET, "ECONNRESET" }, { ENOBUFS, "ENOBUFS" }, { EISCONN, "EISCONN" }, { ENOTCONN, "ENOTCONN" }, { ESHUTDOWN, "ESHUTDOWN" }, { ETOOMANYREFS, "ETOOMANYREFS" }, { ETIMEDOUT, "ETIMEDOUT" }, { ECONNREFUSED, "ECONNREFUSED" }, { EHOSTDOWN, "EHOSTDOWN" }, { EHOSTUNREACH, "EHOSTUNREACH" }, { EALREADY, "EALREADY" }, { EINPROGRESS, "EINPROGRESS" }, { ESTALE, "ESTALE" }, { EUCLEAN, "EUCLEAN" }, { ENOTNAM, "ENOTNAM" }, { ENAVAIL, "ENAVAIL" }, { EISNAM, "EISNAM" }, { EREMOTEIO, "EREMOTEIO" }, { EDQUOT, "EDQUOT" }, { ENOMEDIUM, "ENOMEDIUM" }, { EMEDIUMTYPE, "EMEDIUMTYPE" } }; #endif /* CONFIG_LIBC_STRERROR_SHORT */ #define NERRNO_STRS (sizeof(g_errnomap) / sizeof(struct errno_strmap_s)) #endif /* CONFIG_LIBC_STRERROR */ /************************************************************************ * Private Functions ************************************************************************/ /************************************************************************ * Public Functions ************************************************************************/ /************************************************************************ * Name: strerror ************************************************************************/ FAR const char *strerror(int errnum) { #ifdef CONFIG_LIBC_STRERROR int ndxlow = 0; int ndxhi = NERRNO_STRS - 1; int ndxmid; do { ndxmid = (ndxlow + ndxhi) >> 1; if (errnum > g_errnomap[ndxmid].errnum) { ndxlow = ndxmid + 1; } else if (errnum < g_errnomap[ndxmid].errnum) { ndxhi = ndxmid - 1; } else { return g_errnomap[ndxmid].str; } } while (ndxlow <= ndxhi); #endif return "Unknown error"; }