Source code of Windows XP (NT5)
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//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1995
//
// File: derror.cxx
//
// Contents: Ole NTSD extension routines to display the error
// message for a Win32 or OLE error code
//
// Functions: displayVtbl
//
//
// History: 06-01-95 BruceMa Created
//
//
//--------------------------------------------------------------------------
#include <ole2int.h>
#include <windows.h>
#include "ole.h"
//+-------------------------------------------------------------------------
//
// Function: displayHr
//
// Synopsis: Display the mnesage for a Win32 error or OLE HRESULT
//
// Arguments: [hProcess] - Handle of this process
// [lpExtensionApis] - Table of extension functions
//
// Returns: -
//
// History: 01-Jun-95 BruceMa Created
//
//--------------------------------------------------------------------------
void displayHr (HANDLE hProcess,
PNTSD_EXTENSION_APIS lpExtensionApis,
char *arg)
{
DWORD err = 0;
BOOL fHex = FALSE;
// Determine if it's hex or decimal. Also allow '800xxxxx' to implicitly
// be treated as hexadecimal
if (arg[0] == '0' && (arg[1] == 'x' || arg[1] == 'X'))
{
fHex = TRUE;
arg += 2;
}
else if (arg[0] == '8' && arg[1] == '0' && arg[2] == '0')
{
fHex = TRUE;
}
else
{
char *s = arg;
while (*s)
{
if (('a' <= *s && *s <= 'f') || ('A' <= *s && *s <= 'F'))
{
fHex = TRUE;
break;
}
s++;
}
}
// Parse the error number
if (fHex)
{
int k = 0;
char c;
while (c = arg[k++])
{
c = c - '0';
if (c > 9)
{
if (c <= 'F' && c >= 'A')
{
c = c + '0' - 'A' + 10;
}
else
{
c = c + '0' - 'a' + 10;
}
}
err = (16 * err) + c;
}
}
else
{
int k = 0;
char c;
while (c = arg[k++])
{
c = c - '0';
err = (10 * err) + c;
}
}
// Fetch the associated error message
int cbMsgLen;
char szBuffer[512];
cbMsgLen = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
(DWORD) NULL,
szBuffer,
511,
NULL);
// Output the message
if (cbMsgLen == 0)
{
Printf("...No such error code\n");
}
else
{
szBuffer[cbMsgLen] = '\0';
Printf("%s\n", szBuffer);
}
}