From 771a27d96438c0714bc10c0f446847404273984e Mon Sep 17 00:00:00 2001 From: Sebastien Bourdeauducq Date: Mon, 28 May 2012 19:48:11 +0200 Subject: [PATCH] software/libbase: add strerror --- software/include/base/string.h | 2 + software/libbase/Makefile | 2 +- software/libbase/errno.c | 208 +++++++++++++++++++++++++++++++++ software/libbase/libc.c | 2 - 4 files changed, 211 insertions(+), 3 deletions(-) create mode 100644 software/libbase/errno.c diff --git a/software/include/base/string.h b/software/include/base/string.h index 41705a36..e0a04400 100644 --- a/software/include/base/string.h +++ b/software/include/base/string.h @@ -39,4 +39,6 @@ void *memmove(void *dest, const void *src, size_t count); char *strstr(const char *s1, const char *s2); void *memchr(const void *s, int c, size_t n); +char *strerror(int errnum); + #endif /* __STRING_H */ diff --git a/software/libbase/Makefile b/software/libbase/Makefile index b5a5ab12..afa5650f 100644 --- a/software/libbase/Makefile +++ b/software/libbase/Makefile @@ -1,7 +1,7 @@ M2DIR=../.. include $(M2DIR)/software/common.mak -OBJECTS=setjmp.o libc.o crc16.o crc32.o console.o timer.o system.o board.o uart.o vsnprintf.o strtod.o +OBJECTS=setjmp.o libc.o errno.o crc16.o crc32.o console.o timer.o system.o board.o uart.o vsnprintf.o strtod.o all: libbase.a diff --git a/software/libbase/errno.c b/software/libbase/errno.c new file mode 100644 index 00000000..4e91f78e --- /dev/null +++ b/software/libbase/errno.c @@ -0,0 +1,208 @@ +#include +#include + +int errno; + +/************************************************************************ + * Based on: lib/string/lib_strerror.c + * + * Copyright (C) 2007, 2009, 2011 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. + * + ************************************************************************/ + +struct errno_strmap_s +{ + int errnum; + char *str; +}; + +/* 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 order 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. + */ + +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 } +}; + +#define NERRNO_STRS (sizeof(g_errnomap) / sizeof(struct errno_strmap_s)) + +char *strerror(int errnum) +{ + 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); + return "Unknown error"; +} diff --git a/software/libbase/libc.c b/software/libbase/libc.c index 16aac09a..69b08f54 100644 --- a/software/libbase/libc.c +++ b/software/libbase/libc.c @@ -23,8 +23,6 @@ #include #include -int errno; - /** * strchr - Find the first occurrence of a character in a string * @s: The string to be searched -- 2.30.2