libfdt/fdt_strerror.c

   1 /*
   2  * libfdt - Flat Device Tree manipulation
   3  * Copyright (C) 2006 David Gibson, IBM Corporation.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public License
   7  * as published by the Free Software Foundation; either version 2.1 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19 #include "libfdt_env.h"
  20
  21 #include <fdt.h>
  22 #include <libfdt.h>
  23
  24 #include "libfdt_internal.h"
  25
  26 struct errtabent {
  27         const char *str;
  28 };
  29
  30 #define ERRTABENT(val) \
  31         [(val)] = { .str = #val, }
  32
  33 static struct errtabent errtable[] = {
  34         ERRTABENT(FDT_ERR_NOTFOUND),
  35         ERRTABENT(FDT_ERR_EXISTS),
  36         ERRTABENT(FDT_ERR_NOSPACE),
  37
  38         ERRTABENT(FDT_ERR_BADOFFSET),
  39         ERRTABENT(FDT_ERR_BADPATH),
  40         ERRTABENT(FDT_ERR_BADSTATE),
  41
  42         ERRTABENT(FDT_ERR_TRUNCATED),
  43         ERRTABENT(FDT_ERR_BADMAGIC),
  44         ERRTABENT(FDT_ERR_BADVERSION),
  45         ERRTABENT(FDT_ERR_BADSTRUCTURE),
  46         ERRTABENT(FDT_ERR_BADLAYOUT),
  47 };
  48 #define ERRTABSIZE      (sizeof(errtable) / sizeof(errtable[0]))
  49
  50 const char *fdt_strerror(int errval)
  51 {
  52         if (errval > 0)
  53                 return "<valid offset/length>";
  54         else if (errval == 0)
  55                 return "<no error>";
  56         else if (errval > -ERRTABSIZE) {
  57                 const char *s = errtable[-errval].str;
  58
  59                 if (s)
  60                         return s;
  61         }
  62
  63         return "<unknown error>";
  64 }