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Detect Windows FormatMessage errors, standardize message() return on message-not-found errors

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[SVN r40710]
This commit is contained in:
Beman Dawes
2007-11-03 00:49:07 +00:00
parent e4fc987f74
commit e0c466534b
2 changed files with 26 additions and 7 deletions
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20
src/error_code.cpp
View File

@@ -88,7 +88,7 @@ namespace
|| (defined(__osf__) && !defined(_REENTRANT))\
|| (defined(__vms))
const char * c_str = std::strerror( ev );
return std::string( c_str ? c_str : "invalid_argument" );
return std::string( c_str ? c_str : "Unknown error" );
# else
char buf[64];
char * bp = buf;
@@ -96,7 +96,7 @@ namespace
# if defined(__CYGWIN__) || defined(__USE_GNU)
// Oddball version of strerror_r
const char * c_str = strerror_r( ev, bp, sz );
return std::string( c_str ? c_str : "invalid_argument" );
return std::string( c_str ? c_str : "Unknown error" );
# else
// POSIX version of strerror_r
int result;
@@ -107,7 +107,7 @@ namespace
# if defined (__sgi)
const char * c_str = strerror( ev );
result = 0;
return std::string( c_str ? c_str : "invalid_argument" );
return std::string( c_str ? c_str : "Unknown error" );
# else
result = strerror_r( ev, bp, sz );
# endif
@@ -128,7 +128,7 @@ namespace
}
try
{
std::string msg( ( result == invalid_argument ) ? "invalid_argument" : bp );
std::string msg( ( result == invalid_argument ) ? "Unknown error" : bp );
if ( sz > sizeof(buf) ) std::free( bp );
sz = 0;
return msg;
@@ -347,7 +347,7 @@ namespace
{
# ifndef BOOST_NO_ANSI_APIS
LPVOID lpMsgBuf;
::FormatMessageA(
DWORD retval = ::FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
@@ -358,11 +358,14 @@ namespace
0,
NULL
);
if (retval == 0)
return std::string("Unknown error");
std::string str( static_cast<LPCSTR>(lpMsgBuf) );
::LocalFree( lpMsgBuf ); // free the buffer
# else // WinCE workaround
LPVOID lpMsgBuf;
::FormatMessageW(
DWORD retval = ::FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
@@ -373,10 +376,13 @@ namespace
0,
NULL
);
if (retval == 0)
return std::string("Unknown error");
int num_chars = (wcslen( static_cast<LPCWSTR>(lpMsgBuf) ) + 1) * 2;
LPSTR narrow_buffer = (LPSTR)_alloca( num_chars );
::WideCharToMultiByte(CP_ACP, 0, static_cast<LPCWSTR>(lpMsgBuf), -1, narrow_buffer, num_chars, NULL, NULL);
if (::WideCharToMultiByte(CP_ACP, 0, static_cast<LPCWSTR>(lpMsgBuf), -1, narrow_buffer, num_chars, NULL, NULL) == 0)
return std::string("Unknown error");
std::string str( narrow_buffer );
::LocalFree( lpMsgBuf ); // free the buffer

13
test/error_code_test.cpp
View File

@@ -144,6 +144,19 @@ int test_main( int, char ** )
BOOST_CHECK( system_category == native_ecat );
BOOST_CHECK( posix_category == errno_ecat );
// test error_code and error_condition message(),
// see Boost.Filesystem operations_test for code specific message() tests
ec = error_code( -1, system_category );
BOOST_CHECK( ec.message() == "Unknown error" );
ec = error_code( BOOST_ACCESS_ERROR_MACRO, system_category );
BOOST_CHECK( ec.message() != "" );
BOOST_CHECK( ec.message() != "Unknown error" );
dec = error_condition( -1, posix_category );
BOOST_CHECK( dec.message() == "Unknown error" );
dec = error_condition( BOOST_ACCESS_ERROR_MACRO, posix_category );
BOOST_CHECK( dec.message() != "" );
BOOST_CHECK( dec.message() != "Unknown error" );
#ifdef BOOST_WINDOWS_API
std::cout << "Windows tests...\n";
// these tests probe the Windows posix decoder