w32/subproc/w32err.c

   1 #include <windows.h>
   2 #include "w32err.h"
   3
   4 /*
   5  * Description: the windows32 version of perror()
   6  *
   7  * Returns:  a pointer to a static error
   8  *
   9  * Notes/Dependencies:  I got this from
  10  *      comp.os.ms-windows.programmer.win32
  11  */
  12 char *
  13 map_windows32_error_to_string (DWORD ercode) {
  14 /* __declspec (thread) necessary if you will use multiple threads on MSVC */
  15 #ifdef _MSC_VER
  16 __declspec (thread) static char szMessageBuffer[128];
  17 #else
  18 static char szMessageBuffer[128];
  19 #endif
  20         /* Fill message buffer with a default message in
  21          * case FormatMessage fails
  22          */
  23     wsprintf (szMessageBuffer, "Error %ld\n", ercode);
  24
  25         /*
  26          *  Special code for winsock error handling.
  27          */
  28         if (ercode > WSABASEERR) {
  29                 HMODULE hModule = GetModuleHandle("wsock32");
  30                 if (hModule != NULL) {
  31                         FormatMessage(FORMAT_MESSAGE_FROM_HMODULE,
  32                                 hModule,
  33                                 ercode,
  34                                 LANG_NEUTRAL,
  35                                 szMessageBuffer,
  36                                 sizeof(szMessageBuffer),
  37                                 NULL);
  38                         FreeLibrary(hModule);
  39                 }
  40         } else {
  41                 /*
  42                  *  Default system message handling
  43                  */
  44         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
  45                   NULL,
  46                   ercode,
  47                   LANG_NEUTRAL,
  48                   szMessageBuffer,
  49                   sizeof(szMessageBuffer),
  50                   NULL);
  51         }
  52     return szMessageBuffer;
  53 }
  54