Add get_module_filename

pull/1161/head
Paparoni Alvardo 2019-07-14 23:59:25 +03:00 committed by Alexander Medvednikov
parent 4af58e0925
commit 7058333f17
2 changed files with 35 additions and 7 deletions

View File

@ -1,5 +1,11 @@
module os
// Ref - winnt.h
const (
SUCCESS = 0 // ERROR_SUCCESS
ERROR_INSUFFICIENT_BUFFER = 130
)
const (
FILE_SHARE_READ = 1
FILE_SHARE_WRITE = 2

View File

@ -2,16 +2,38 @@ module os
// Ref - https://docs.microsoft.com/en-us/windows/desktop/winprog/windows-data-types
// A handle to an object.
/*
type HANDLE voidptr // C.HANDLE
type HANDLE voidptr
// Ref - https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/get-osfhandle?view=vs-2019
// get_file_handle retrieves the operating-system file handle that is associated with the specified file descriptor.
pub fn get_file_handle(path string) HANDLE {
mode := 'rb'
_fh := C.fopen(path.cstr(), mode.cstr())
if isnil(_fh) {
return HANDLE(INVALID_HANDLE_VALUE)
_fd := C.fopen(path.cstr(), mode.cstr())
if _fd == 0 {
return HANDLE(INVALID_HANDLE_VALUE)
}
_handle := C._get_osfhandle(C._fileno(_fh)) // CreateFile? - hah, no -_-
_handle := C._get_osfhandle(C._fileno(_fd)) // CreateFile? - hah, no -_-
return _handle
}
*/
// Ref - https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamea
// get_module_filename retrieves the fully qualified path for the file that contains the specified module.
// The module must have been loaded by the current process.
pub fn get_module_filename(handle HANDLE) ?string {
mut sz := int(1024) // Optimized length
mut buf := [byte(0); sz] // Not work for GetModuleFileNameW :(
for {
status := C.GetModuleFileName(handle, &buf, sz)
switch status {
case SUCCESS:
_filename := tos(buf.data, sz)
return _filename
case ERROR_INSUFFICIENT_BUFFER:
sz += 1024 // increment buffer cluster by 1024
buf = [byte(0); sz] // clear buffer
default:
// Must handled with GetLastError and converted by FormatMessage
return error('Cannot get file name from handle.')
}
}
}