40 lines
1.5 KiB
Go
40 lines
1.5 KiB
Go
module os
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// Ref - https://docs.microsoft.com/en-us/windows/desktop/winprog/windows-data-types
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// A handle to an object.
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type HANDLE voidptr
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// Ref - https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/get-osfhandle?view=vs-2019
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// get_file_handle retrieves the operating-system file handle that is associated with the specified file descriptor.
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pub fn get_file_handle(path string) HANDLE {
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mode := 'rb'
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_fd := C.fopen(path.cstr(), mode.cstr())
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if _fd == 0 {
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return HANDLE(INVALID_HANDLE_VALUE)
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}
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_handle := C._get_osfhandle(C._fileno(_fd)) // CreateFile? - hah, no -_-
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return _handle
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}
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// Ref - https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamea
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// get_module_filename retrieves the fully qualified path for the file that contains the specified module.
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// The module must have been loaded by the current process.
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pub fn get_module_filename(handle HANDLE) ?string {
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mut sz := int(1024) // Optimized length
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mut buf := [byte(0); sz] // Not work for GetModuleFileNameW :(
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for {
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status := C.GetModuleFileName(handle, &buf, sz)
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switch status {
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case SUCCESS:
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_filename := tos(buf.data, sz)
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return _filename
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case ERROR_INSUFFICIENT_BUFFER:
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sz += 1024 // increment buffer cluster by 1024
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buf = [byte(0); sz] // clear buffer
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default:
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// Must handled with GetLastError and converted by FormatMessage
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return error('Cannot get file name from handle.')
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}
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}
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}
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