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implement std.os.symLink for windows

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This commit is contained in:
Andrew Kelley 2017-10-14 17:39:44 -04:00
parent ad6eec9480
commit 61d715d784
3 changed files with 41 additions and 16 deletions
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2
std/cstr.zig
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@ -45,5 +45,5 @@ pub fn addNullByte(allocator: &mem.Allocator, slice: []const u8) -> %[]u8 {
const result = %return allocator.alloc(u8, slice.len + 1);
mem.copy(u8, result, slice);
result[slice.len] = 0;
return result[0..slice.len];
return result;
}

24
std/os/index.zig
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@ -322,7 +322,7 @@ pub fn createNullDelimitedEnvMap(allocator: &Allocator, env_map: &const BufMap)
pub fn freeNullDelimitedEnvMap(allocator: &Allocator, envp_buf: []?&u8) {
for (envp_buf) |env| {
const env_buf = if (env) |ptr| cstr.toSlice(ptr) else break;
const env_buf = if (env) |ptr| ptr[0 .. cstr.len(ptr) + 1] else break;
allocator.free(env_buf);
}
allocator.free(envp_buf);
@ -490,6 +490,28 @@ test "os.getCwd" {
}
pub fn symLink(allocator: &Allocator, existing_path: []const u8, new_path: []const u8) -> %void {
if (is_windows) {
return symLinkWindows(allocator, existing_path, new_path);
} else {
return symLinkPosix(allocator, existing_path, new_path);
}
}
pub fn symLinkWindows(allocator: &Allocator, existing_path: []const u8, new_path: []const u8) -> %void {
const existing_with_null = %return cstr.addNullByte(allocator, existing_path);
defer allocator.free(existing_with_null);
const new_with_null = %return cstr.addNullByte(allocator, new_path);
defer allocator.free(new_with_null);
if (windows.CreateSymbolicLinkA(existing_with_null.ptr, new_with_null.ptr, 0) == 0) {
const err = windows.GetLastError();
return switch (err) {
else => error.Unexpected,
};
}
}
pub fn symLinkPosix(allocator: &Allocator, existing_path: []const u8, new_path: []const u8) -> %void {
const full_buf = %return allocator.alloc(u8, existing_path.len + new_path.len + 2);
defer allocator.free(full_buf);

31
std/os/windows/index.zig
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@ -25,6 +25,9 @@ pub extern "kernel32" stdcallcc fn CreateProcessA(lpApplicationName: ?LPCSTR, lp
dwCreationFlags: DWORD, lpEnvironment: ?LPVOID, lpCurrentDirectory: ?LPCSTR, lpStartupInfo: &STARTUPINFOA,
lpProcessInformation: &PROCESS_INFORMATION) -> BOOL;
pub extern "kernel32" stdcallcc fn CreateSymbolicLinkA(lpSymlinkFileName: LPCSTR, lpTargetFileName: LPCSTR,
dwFlags: DWORD) -> BOOLEAN;
pub extern "kernel32" stdcallcc fn DeleteFileA(lpFileName: LPCSTR) -> bool;
pub extern "kernel32" stdcallcc fn ExitProcess(exit_code: UINT) -> noreturn;
@ -74,34 +77,34 @@ pub extern "user32" stdcallcc fn MessageBoxA(hWnd: ?HANDLE, lpText: ?LPCTSTR, lp
pub const PROV_RSA_FULL = 1;
pub const UNICODE = false;
pub const LPTSTR = if (UNICODE) LPWSTR else LPSTR;
pub const LPWSTR = &WCHAR;
pub const LPSTR = &CHAR;
pub const CHAR = u8;
pub const PWSTR = &WCHAR;
pub const SIZE_T = usize;
pub const BOOL = bool;
pub const BOOLEAN = BYTE;
pub const BYTE = u8;
pub const WORD = u16;
pub const CHAR = u8;
pub const DWORD = u32;
pub const FLOAT = f32;
pub const HANDLE = &c_void;
pub const HINSTANCE = &@OpaqueType();
pub const HCRYPTPROV = ULONG_PTR;
pub const LPCTSTR = &const TCHAR;
pub const HINSTANCE = &@OpaqueType();
pub const INT = c_int;
pub const LPBYTE = &BYTE;
pub const LPCSTR = &const CHAR;
pub const LPCTSTR = &const TCHAR;
pub const LPCVOID = &const c_void;
pub const LPDWORD = &DWORD;
pub const LPSTR = &CHAR;
pub const LPTSTR = if (UNICODE) LPWSTR else LPSTR;
pub const LPVOID = &c_void;
pub const LPWSTR = &WCHAR;
pub const PVOID = &c_void;
pub const PWSTR = &WCHAR;
pub const SIZE_T = usize;
pub const TCHAR = if (UNICODE) WCHAR else u8;
pub const UINT = c_uint;
pub const INT = c_int;
pub const ULONG_PTR = usize;
pub const UNICODE = false;
pub const WCHAR = u16;
pub const LPCVOID = &const c_void;
pub const LPBYTE = &BYTE;
pub const WORD = u16;
/// The standard input device. Initially, this is the console input buffer, CONIN$.
pub const STD_INPUT_HANDLE = @maxValue(DWORD) - 10 + 1;