gdbsupport/errors.cc

   1 /* Error reporting facilities.
   2
   3    Copyright (C) 1986-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "common-defs.h"
  21 #include "errors.h"
  22 #if defined (USE_WIN32API) || defined(__CYGWIN__)
  23 #include <windows.h>
  24 #endif /* USE_WIN32API */
  25
  26 /* See gdbsupport/errors.h.  */
  27
  28 void
  29 warning (const char *fmt, ...)
  30 {
  31   va_list ap;
  32
  33   va_start (ap, fmt);
  34   vwarning (fmt, ap);
  35   va_end (ap);
  36 }
  37
  38 /* See gdbsupport/errors.h.  */
  39
  40 void
  41 error (const char *fmt, ...)
  42 {
  43   va_list ap;
  44
  45   va_start (ap, fmt);
  46   verror (fmt, ap);
  47   va_end (ap);
  48 }
  49
  50 /* See gdbsupport/errors.h.  */
  51
  52 void
  53 internal_error_loc (const char *file, int line, const char *fmt, ...)
  54 {
  55   va_list ap;
  56
  57   va_start (ap, fmt);
  58   internal_verror (file, line, fmt, ap);
  59   va_end (ap);
  60 }
  61
  62 /* See gdbsupport/errors.h.  */
  63
  64 void
  65 internal_warning_loc (const char *file, int line, const char *fmt, ...)
  66 {
  67   va_list ap;
  68
  69   va_start (ap, fmt);
  70   internal_vwarning (file, line, fmt, ap);
  71   va_end (ap);
  72 }
  73
  74 /* See errors.h.  */
  75
  76 std::string
  77 perror_string (const char *prefix, int errnum)
  78 {
  79   const char *err;
  80
  81   if (errnum != 0)
  82     err = safe_strerror (errnum);
  83   else
  84     err = safe_strerror (errno);
  85   return std::string (prefix) + ": " + err;
  86 }
  87
  88 /* See errors.h.  */
  89
  90 void
  91 perror_with_name (const char *string, int errnum)
  92 {
  93   std::string combined = perror_string (string, errnum);
  94
  95   error (_("%s."), combined.c_str ());
  96 }
  97
  98 #if defined (USE_WIN32API) || defined(__CYGWIN__)
  99
 100 /* See errors.h.  */
 101
 102 const char *
 103 strwinerror (ULONGEST error)
 104 {
 105   static char buf[1024];
 106   TCHAR *msgbuf;
 107   DWORD lasterr = GetLastError ();
 108   DWORD chars = FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
 109                                | FORMAT_MESSAGE_ALLOCATE_BUFFER,
 110                                NULL,
 111                                error,
 112                                0, /* Default language */
 113                                (LPTSTR) &msgbuf,
 114                                0,
 115                                NULL);
 116   if (chars != 0)
 117     {
 118       /* If there is an \r\n appended, zap it.  */
 119       if (chars >= 2
 120           && msgbuf[chars - 2] == '\r'
 121           && msgbuf[chars - 1] == '\n')
 122         {
 123           chars -= 2;
 124           msgbuf[chars] = 0;
 125         }
 126
 127       if (chars > ARRAY_SIZE (buf) - 1)
 128         {
 129           chars = ARRAY_SIZE (buf) - 1;
 130           msgbuf [chars] = 0;
 131         }
 132
 133 #ifdef UNICODE
 134       wcstombs (buf, msgbuf, chars + 1);
 135 #else
 136       strncpy (buf, msgbuf, chars + 1);
 137 #endif
 138       LocalFree (msgbuf);
 139     }
 140   else
 141     sprintf (buf, "unknown win32 error (%u)", (unsigned) error);
 142
 143   SetLastError (lasterr);
 144   return buf;
 145 }
 146
 147 #endif /* USE_WIN32API */