112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
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// 25 february 2015
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#include "area.h"
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// uncomment the following line to enable debug messages
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#define tableDebug
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// uncomment the following line to halt on a debug message
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#define tableDebugStop
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#ifdef tableDebug
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#include <stdio.h>
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HRESULT logLastError(const char *context)
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{
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DWORD le;
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WCHAR *msg;
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BOOL parenthesize = FALSE;
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BOOL localFreeFailed = FALSE;
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DWORD localFreeLastError;
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le = GetLastError();
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fprintf(stderr, "%s: ", context);
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if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, le, 0, (LPWSTR) (&msg), 0, NULL) != 0) {
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fprintf(stderr, "%S (", msg);
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if (LocalFree(msg) != NULL) {
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localFreeFailed = TRUE;
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localFreeLastError = GetLastError();
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}
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parenthesize = TRUE;
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}
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fprintf(stderr, "GetLastError() == %I32u", le);
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if (parenthesize)
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fprintf(stderr, ")");
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if (localFreeFailed)
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fprintf(stderr, "; local free of system message failed with last error %I32u", localFreeLastError);
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fprintf(stderr, "\n");
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#ifdef tableDebugStop
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DebugBreak();
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#endif
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SetLastError(le);
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// a function does not have to set a last error
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// if the last error we get is actually 0, then HRESULT_FROM_WIN32(0) will return S_OK (0 cast to an HRESULT, since 0 <= 0), which we don't want
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// prevent this by returning E_FAIL, so the rest of the Table code doesn't barge onward
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if (le == 0)
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return E_FAIL;
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return HRESULT_FROM_WIN32(le);
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}
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HRESULT logHRESULT(const char *context, HRESULT hr)
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{
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WCHAR *msg;
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BOOL parenthesize = FALSE;
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BOOL localFreeFailed = FALSE;
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DWORD localFreeLastError;
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fprintf(stderr, "%s: ", context);
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// this isn't technically documented, but everyone does it, including Microsoft (see the implementation of _com_error::ErrorMessage() in a copy of comdef.h that comes with the Windows DDK)
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if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, (DWORD) hr, 0, (LPWSTR) (&msg), 0, NULL) != 0) {
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fprintf(stderr, "%S (", msg);
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if (LocalFree(msg) != NULL) {
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localFreeFailed = TRUE;
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localFreeLastError = GetLastError();
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}
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parenthesize = TRUE;
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}
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fprintf(stderr, "HRESULT == 0x%I32X", hr);
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if (parenthesize)
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fprintf(stderr, ")");
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if (localFreeFailed)
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fprintf(stderr, "; local free of system message failed with last error %I32u", localFreeLastError);
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fprintf(stderr, "\n");
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#ifdef tableDebugStop
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DebugBreak();
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#endif
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return hr;
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}
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HRESULT logMemoryExhausted(const char *reason)
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{
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fprintf(stderr, "memory exhausted %s\n", reason);
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#ifdef tableDebugStop
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DebugBreak();
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#endif
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return E_OUTOFMEMORY;
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}
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#else
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HRESULT logLastError(const char *reason)
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{
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DWORD le;
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le = GetLastError();
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// we shouldn't need to do this, but let's do this anyway just to be safe
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SetLastError(le);
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if (le == 0)
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return E_FAIL;
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return HRESULT_FROM_WIN32(le);
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}
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HRESULT logHRESULT(const char *reason, HRESULT hr)
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{
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return hr;
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}
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HRESULT logMemoryExhausted(const char *reason)
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{
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return E_OUTOFMEMORY;
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}
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#endif
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