ext/libfdt/fdt_strerror.c

   1 /*
   2  * libfdt - Flat Device Tree manipulation
   3  * Copyright (C) 2006 David Gibson, IBM Corporation.
   4  *
   5  *     Redistribution and use in source and binary forms, with or
   6  *     without modification, are permitted provided that the following
   7  *     conditions are met:
   8  *
   9  *     1. Redistributions of source code must retain the above
  10  *        copyright notice, this list of conditions and the following
  11  *        disclaimer.
  12  *     2. Redistributions in binary form must reproduce the above
  13  *        copyright notice, this list of conditions and the following
  14  *        disclaimer in the documentation and/or other materials
  15  *        provided with the distribution.
  16  *
  17  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  18  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  19  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  22  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  29  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include <fdt.h>
  32 #include <libfdt.h>
  33
  34 #include "libfdt_env.h"
  35 #include "libfdt_internal.h"
  36
  37 struct fdt_errtabent {
  38         const char *str;
  39 };
  40
  41 #define FDT_ERRTABENT(val) \
  42         [(val)] = { .str = #val, }
  43
  44 static struct fdt_errtabent fdt_errtable[] = {
  45         FDT_ERRTABENT(FDT_ERR_NOTFOUND),
  46         FDT_ERRTABENT(FDT_ERR_EXISTS),
  47         FDT_ERRTABENT(FDT_ERR_NOSPACE),
  48
  49         FDT_ERRTABENT(FDT_ERR_BADOFFSET),
  50         FDT_ERRTABENT(FDT_ERR_BADPATH),
  51         FDT_ERRTABENT(FDT_ERR_BADSTATE),
  52
  53         FDT_ERRTABENT(FDT_ERR_TRUNCATED),
  54         FDT_ERRTABENT(FDT_ERR_BADMAGIC),
  55         FDT_ERRTABENT(FDT_ERR_BADVERSION),
  56         FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
  57         FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
  58 };
  59 #define FDT_ERRTABSIZE  (sizeof(fdt_errtable) / sizeof(fdt_errtable[0]))
  60
  61 const char *fdt_strerror(int errval)
  62 {
  63         if (errval > 0)
  64                 return "<valid offset/length>";
  65         else if (errval == 0)
  66                 return "<no error>";
  67         else if (errval > -FDT_ERRTABSIZE) {
  68                 const char *s = fdt_errtable[-errval].str;
  69
  70                 if (s)
  71                         return s;
  72         }
  73
  74         return "<unknown error>";
  75 }