boostorg/system
1
0
Fork 1
mirror of https://github.com/boostorg/system.git synced 2026-01-26 09:02:21 +01:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
[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
Download Patch File Download Diff File Expand all files Collapse all files

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