mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-16 10:52:22 -07:00
gingerBill
315 lines
8.3 KiB
Odin
315 lines
8.3 KiB
Odin
import win32 "core:sys/windows.odin"
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import "core:mem.odin"
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Handle :: uintptr;
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File_Time :: u64;
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INVALID_HANDLE :: ~Handle(0);
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O_RDONLY :: 0x00000;
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O_WRONLY :: 0x00001;
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O_RDWR :: 0x00002;
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O_CREATE :: 0x00040;
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O_EXCL :: 0x00080;
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O_NOCTTY :: 0x00100;
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O_TRUNC :: 0x00200;
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O_NONBLOCK :: 0x00800;
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O_APPEND :: 0x00400;
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O_SYNC :: 0x01000;
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O_ASYNC :: 0x02000;
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O_CLOEXEC :: 0x80000;
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Errno :: int;
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ERROR_NONE: Errno : 0;
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ERROR_FILE_NOT_FOUND: Errno : 2;
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ERROR_PATH_NOT_FOUND: Errno : 3;
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ERROR_ACCESS_DENIED: Errno : 5;
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ERROR_NO_MORE_FILES: Errno : 18;
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ERROR_HANDLE_EOF: Errno : 38;
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ERROR_NETNAME_DELETED: Errno : 64;
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ERROR_FILE_EXISTS: Errno : 80;
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ERROR_BROKEN_PIPE: Errno : 109;
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ERROR_BUFFER_OVERFLOW: Errno : 111;
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ERROR_INSUFFICIENT_BUFFER: Errno : 122;
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ERROR_MOD_NOT_FOUND: Errno : 126;
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ERROR_PROC_NOT_FOUND: Errno : 127;
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ERROR_DIR_NOT_EMPTY: Errno : 145;
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ERROR_ALREADY_EXISTS: Errno : 183;
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ERROR_ENVVAR_NOT_FOUND: Errno : 203;
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ERROR_MORE_DATA: Errno : 234;
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ERROR_OPERATION_ABORTED: Errno : 995;
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ERROR_IO_PENDING: Errno : 997;
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ERROR_NOT_FOUND: Errno : 1168;
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ERROR_PRIVILEGE_NOT_HELD: Errno : 1314;
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WSAEACCES: Errno : 10013;
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WSAECONNRESET: Errno : 10054;
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// Windows reserves errors >= 1<<29 for application use
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ERROR_FILE_IS_PIPE: Errno : 1<<29 + 0;
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// "Argv" arguments converted to Odin strings
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args := _alloc_command_line_arguments();
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open :: proc(path: string, mode: int = O_RDONLY, perm: u32 = 0) -> (Handle, Errno) {
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if len(path) == 0 do return INVALID_HANDLE, ERROR_FILE_NOT_FOUND;
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access: u32;
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switch mode & (O_RDONLY|O_WRONLY|O_RDWR) {
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case O_RDONLY: access = win32.FILE_GENERIC_READ;
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case O_WRONLY: access = win32.FILE_GENERIC_WRITE;
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case O_RDWR: access = win32.FILE_GENERIC_READ | win32.FILE_GENERIC_WRITE;
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}
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if mode&O_CREATE != 0 {
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access |= win32.FILE_GENERIC_WRITE;
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}
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if mode&O_APPEND != 0 {
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access &~= win32.FILE_GENERIC_WRITE;
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access |= win32.FILE_APPEND_DATA;
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}
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share_mode := u32(win32.FILE_SHARE_READ|win32.FILE_SHARE_WRITE);
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sa: ^win32.Security_Attributes = nil;
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sa_inherit := win32.Security_Attributes{length = size_of(win32.Security_Attributes), inherit_handle = 1};
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if mode&O_CLOEXEC == 0 {
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sa = &sa_inherit;
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}
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create_mode: u32;
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switch {
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case mode&(O_CREATE|O_EXCL) == (O_CREATE | O_EXCL):
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create_mode = win32.CREATE_NEW;
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case mode&(O_CREATE|O_TRUNC) == (O_CREATE | O_TRUNC):
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create_mode = win32.CREATE_ALWAYS;
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case mode&O_CREATE == O_CREATE:
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create_mode = win32.OPEN_ALWAYS;
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case mode&O_TRUNC == O_TRUNC:
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create_mode = win32.TRUNCATE_EXISTING;
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case:
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create_mode = win32.OPEN_EXISTING;
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}
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buf: [300]byte;
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copy(buf[..], cast([]byte)path);
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handle := Handle(win32.create_file_a(&buf[0], access, share_mode, sa, create_mode, win32.FILE_ATTRIBUTE_NORMAL, nil));
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if handle != INVALID_HANDLE do return handle, ERROR_NONE;
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err := Errno(win32.get_last_error());
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return INVALID_HANDLE, err;
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}
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close :: proc(fd: Handle) {
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win32.close_handle(win32.Handle(fd));
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}
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write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
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if len(data) == 0 do return 0, ERROR_NONE;
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single_write_length: i32;
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total_write: i64;
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length := i64(len(data));
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for total_write < length {
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remaining := length - total_write;
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MAX :: 1<<31-1;
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to_write: i32 = min(i32(remaining), MAX);
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e := win32.write_file(win32.Handle(fd), &data[total_write], to_write, &single_write_length, nil);
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if single_write_length <= 0 || e == win32.FALSE {
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err := Errno(win32.get_last_error());
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return int(total_write), err;
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}
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total_write += i64(single_write_length);
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}
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return int(total_write), ERROR_NONE;
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}
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read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
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if len(data) == 0 do return 0, ERROR_NONE;
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single_read_length: i32;
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total_read: i64;
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length := i64(len(data));
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for total_read < length {
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remaining := length - total_read;
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MAX :: 1<<32-1;
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to_read: u32 = min(u32(remaining), MAX);
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e := win32.read_file(win32.Handle(fd), &data[total_read], to_read, &single_read_length, nil);
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if single_read_length <= 0 || e == win32.FALSE {
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err := Errno(win32.get_last_error());
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return int(total_read), err;
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}
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total_read += i64(single_read_length);
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}
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return int(total_read), ERROR_NONE;
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}
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seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
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w: u32;
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switch whence {
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case 0: w = win32.FILE_BEGIN;
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case 1: w = win32.FILE_CURRENT;
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case 2: w = win32.FILE_END;
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}
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hi := i32(offset>>32);
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lo := i32(offset);
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ft := win32.get_file_type(win32.Handle(fd));
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if ft == win32.FILE_TYPE_PIPE do return 0, ERROR_FILE_IS_PIPE;
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dw_ptr := win32.set_file_pointer(win32.Handle(fd), lo, &hi, w);
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if dw_ptr == win32.INVALID_SET_FILE_POINTER {
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err := Errno(win32.get_last_error());
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return 0, err;
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}
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return i64(hi)<<32 + i64(dw_ptr), ERROR_NONE;
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}
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file_size :: proc(fd: Handle) -> (i64, Errno) {
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length: i64;
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err: Errno;
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if win32.get_file_size_ex(win32.Handle(fd), &length) == 0 {
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err = Errno(win32.get_last_error());
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}
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return length, err;
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}
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// NOTE(bill): Uses startup to initialize it
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stdin := get_std_handle(win32.STD_INPUT_HANDLE);
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stdout := get_std_handle(win32.STD_OUTPUT_HANDLE);
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stderr := get_std_handle(win32.STD_ERROR_HANDLE);
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get_std_handle :: proc(h: int) -> Handle {
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fd := win32.get_std_handle(i32(h));
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win32.set_handle_information(fd, win32.HANDLE_FLAG_INHERIT, 0);
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return Handle(fd);
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}
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last_write_time :: proc(fd: Handle) -> File_Time {
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file_info: win32.By_Handle_File_Information;
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win32.get_file_information_by_handle(win32.Handle(fd), &file_info);
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lo := File_Time(file_info.last_write_time.lo);
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hi := File_Time(file_info.last_write_time.hi);
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return lo | hi << 32;
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}
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last_write_time_by_name :: proc(name: string) -> File_Time {
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last_write_time: win32.Filetime;
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data: win32.File_Attribute_Data;
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buf: [1024]byte;
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assert(len(buf) > len(name));
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copy(buf[..], cast([]byte)name);
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if win32.get_file_attributes_ex_a(&buf[0], win32.GetFileExInfoStandard, &data) != 0 {
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last_write_time = data.last_write_time;
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}
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l := File_Time(last_write_time.lo);
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h := File_Time(last_write_time.hi);
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return l | h << 32;
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}
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heap_alloc :: proc(size: int) -> rawptr {
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return win32.heap_alloc(win32.get_process_heap(), win32.HEAP_ZERO_MEMORY, size);
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}
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heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
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if new_size == 0 {
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heap_free(ptr);
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return nil;
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}
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if ptr == nil do return heap_alloc(new_size);
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return win32.heap_realloc(win32.get_process_heap(), win32.HEAP_ZERO_MEMORY, ptr, new_size);
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}
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heap_free :: proc(ptr: rawptr) {
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if ptr == nil do return;
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win32.heap_free(win32.get_process_heap(), 0, ptr);
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}
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exit :: proc(code: int) {
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win32.exit_process(u32(code));
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}
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current_thread_id :: proc() -> int {
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return int(win32.get_current_thread_id());
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}
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_alloc_command_line_arguments :: proc() -> []string {
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alloc_ucs2_to_utf8 :: proc(wstr: ^u16) -> string {
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wstr_len := 0;
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for (wstr+wstr_len)^ != 0 do wstr_len += 1;
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len := 2*wstr_len-1;
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buf := make([]byte, len+1);
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str := mem.slice_ptr(wstr, wstr_len+1);
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i, j := 0, 0;
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for str[j] != 0 {
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switch {
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case str[j] < 0x80:
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if i+1 > len do return "";
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buf[i] = byte(str[j]); i += 1;
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j += 1;
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case str[j] < 0x800:
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if i+2 > len do return "";
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buf[i] = byte(0xc0 + (str[j]>>6)); i += 1;
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buf[i] = byte(0x80 + (str[j]&0x3f)); i += 1;
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j += 1;
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case 0xd800 <= str[j] && str[j] < 0xdc00:
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if i+4 > len do return "";
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c := rune((str[j] - 0xd800) << 10) + rune((str[j+1]) - 0xdc00) + 0x10000;
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buf[i] = byte(0xf0 + (c >> 18)); i += 1;
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buf[i] = byte(0x80 + ((c >> 12) & 0x3f)); i += 1;
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buf[i] = byte(0x80 + ((c >> 6) & 0x3f)); i += 1;
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buf[i] = byte(0x80 + ((c ) & 0x3f)); i += 1;
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j += 2;
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case 0xdc00 <= str[j] && str[j] < 0xe000:
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return "";
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case:
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if i+3 > len do return "";
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buf[i] = 0xe0 + byte (str[j] >> 12); i += 1;
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buf[i] = 0x80 + byte((str[j] >> 6) & 0x3f); i += 1;
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buf[i] = 0x80 + byte((str[j] ) & 0x3f); i += 1;
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j += 1;
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}
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}
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return string(buf[..i]);
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}
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arg_count: i32;
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arg_list_ptr := win32.command_line_to_argv_w(win32.get_command_line_w(), &arg_count);
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arg_list := make([]string, int(arg_count));
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for _, i in arg_list do arg_list[i] = alloc_ucs2_to_utf8((arg_list_ptr+i)^);
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return arg_list;
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}
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