164 lines
3.8 KiB
C
164 lines
3.8 KiB
C
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/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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fmt.c
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Abstract:
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Example of a test code using FormatMessage() api.
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Author:
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Vladimir Z. Vulovic (vladimv) 06 - November - 1992
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Environment:
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User Mode - Win32
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Revision History:
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06-Nov-1992 vladimv
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Created
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--*/
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#include "atclient.h"
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#include <stdlib.h> // exit()
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#include <stdio.h> // printf
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#include <wchar.h> // wcslen
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// #include <tstring.h> // wcslen
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#include <apperr.h> // APE_AT_USAGE
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#include <apperr2.h> // APE2_GEN_MONDAY + APE2_*
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#include <lmapibuf.h> // NetApiBufferFree
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BOOL
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DecimalStringToDword(
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IN CHAR * pDecimalString,
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OUT PDWORD pNumber
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)
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/*++
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This routine converts a string into a DWORD if it possibly can.
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The conversion is successful if string is decimal numeric and
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does not lead to an overflow.
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pDecimalString ptr to decimal string
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pNumber ptr to number
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FALSE invalid number
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TRUE valid number
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--*/
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{
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DWORD Value;
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DWORD OldValue;
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DWORD digit;
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if ( pDecimalString == NULL || *pDecimalString == 0) {
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return( FALSE);
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}
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Value = 0;
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while ( (digit = *pDecimalString++) != 0) {
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if ( digit < L'0' || digit > L'9') {
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return( FALSE); // not a decimal string
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}
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OldValue = Value;
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Value = digit - L'0' + 10 * Value;
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if ( Value < OldValue) {
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return( FALSE); // overflow
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}
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}
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*pNumber = Value;
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return( TRUE);
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}
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VOID __cdecl
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main(
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int argc,
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CHAR ** argv
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)
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{
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LPVOID lpSource;
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DWORD length;
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WCHAR buffer[ 256];
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BOOL success;
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DWORD number;
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WCHAR * strings[ 1];
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if ( argc != 2) {
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printf( "%s", "Usage: fmt error_number\n");
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exit( -1);
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}
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success = DecimalStringToDword( argv[ 1], &number);
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if ( success != TRUE) {
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printf( "Usage: fmt decimal_string_for_error_number\n");
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exit( -1);
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}
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lpSource = LoadLibrary( L"netmsg.dll");
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if ( lpSource == NULL) {
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printf( " LoadLibrary() fails with winError = %d\n", GetLastError());
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exit( -1);
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}
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length = FormatMessage(
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FORMAT_MESSAGE_FROM_HMODULE | // dwFlags
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FORMAT_MESSAGE_ARGUMENT_ARRAY,
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lpSource,
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number, // MessageId
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0, // dwLanguageId
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buffer, // lpBuffer
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sizeof( buffer), // nSize
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NULL
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);
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if ( length == 0) {
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printf( " FormatMessage() fails with winError = %d\n", GetLastError());
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}
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printf( "%s", buffer);
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if ( number != APE2_GEN_DEFAULT_NO) {
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goto exit;
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}
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strings[ 0] = buffer;
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printf( "\nSpecial case of APE_GEN_DEFAULT_NO inserted in APE_OkToProceed\n");
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length = FormatMessage(
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FORMAT_MESSAGE_FROM_HMODULE | // dwFlags
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FORMAT_MESSAGE_ARGUMENT_ARRAY,
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lpSource,
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APE_OkToProceed, // MessageId
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0, // dwLanguageId
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buffer, // lpBuffer
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sizeof( buffer), // nSize
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(va_list *)strings // lpArguments
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);
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if ( length == 0) {
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printf( " FormatMessage() fails with winError = %d\n", GetLastError());
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}
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printf( "%s", buffer);
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exit:
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success = FreeLibrary( lpSource);
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if ( success != TRUE) {
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printf( " FreeLibrary() fails with winError = %d\n", GetLastError());
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}
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}
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