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93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
module os
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#flag -lws2_32
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#include <winsock2.h>
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const (
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PathSeparator = '\\'
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)
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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._wfopen(path.to_wide(), mode.to_wide())
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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(4096) // Optimized length
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mut buf := &u16(malloc(4096))
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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 := string_from_wide2(buf, sz)
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return _filename
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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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// Ref - https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessagea#parameters
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const (
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FORMAT_MESSAGE_ALLOCATE_BUFFER = 0x00000100
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FORMAT_MESSAGE_ARGUMENT_ARRAY = 0x00002000
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FORMAT_MESSAGE_FROM_HMODULE = 0x00000800
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FORMAT_MESSAGE_FROM_STRING = 0x00000400
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FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000
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FORMAT_MESSAGE_IGNORE_INSERTS = 0x00000200
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)
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// Ref - winnt.h
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const (
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SUBLANG_NEUTRAL = 0x00
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SUBLANG_DEFAULT = 0x01
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LANG_NEUTRAL = (SUBLANG_NEUTRAL)
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)
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// Ref - https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes--12000-15999-
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const (
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MAX_ERROR_CODE = 15841 // ERROR_API_UNAVAILABLE
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)
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// ptr_win_get_error_msg return string (voidptr)
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// representation of error, only for windows.
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fn ptr_win_get_error_msg(code u32) voidptr {
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mut buf := voidptr(0)
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// Check for code overflow
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if code > u32(MAX_ERROR_CODE) {
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return buf
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}
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C.FormatMessage(
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FORMAT_MESSAGE_ALLOCATE_BUFFER
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| FORMAT_MESSAGE_FROM_SYSTEM
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| FORMAT_MESSAGE_IGNORE_INSERTS,
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0, code, C.MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &buf, 0, 0)
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return buf
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}
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// get_error_msg return error code representation in string.
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pub fn get_error_msg(code int) string {
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if code < 0 { // skip negative
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return ''
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}
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_ptr_text := ptr_win_get_error_msg(u32(code))
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if _ptr_text == 0 { // compare with null
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return ''
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}
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return tos(_ptr_text, C.strlen(_ptr_text))
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} |