mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2026-01-04 12:33:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

std.fs.File.Writer: implement positional writing for Windows

Browse Source
This commit is contained in:
Andrew Kelley 2025-07-07 23:09:14 -07:00
parent 720cd43fc1
commit 5955ba4f53
1 changed files with 46 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
lib/std/fs/File.zig
View File

@ -1665,32 +1665,60 @@ pub const Writer = struct {
const handle = w.file.handle;
const buffered = io_w.buffered();
if (is_windows) switch (w.mode) {
.positional, .positional_reading => @panic("TODO"),
.streaming, .streaming_reading => {
var i: usize = 0;
while (i < buffered.len) {
const n = windows.WriteFile(handle, buffered[i..], null) catch |err| {
.positional, .positional_reading => {
if (buffered.len != 0) {
const n = windows.WriteFile(handle, buffered, w.pos) catch |err| {
w.err = err;
w.pos += i;
_ = io_w.consume(i);
return error.WriteFailed;
};
i += n;
if (data.len > 0 and buffered.len - i < n) {
w.pos += i;
return io_w.consume(i);
}
w.pos += n;
return io_w.consume(n);
}
if (i != 0 or data.len == 0 or (data.len == 1 and splat == 0)) {
w.pos += i;
return io_w.consume(i);
for (data[0 .. data.len - 1]) |buf| {
if (buf.len == 0) continue;
const n = windows.WriteFile(handle, buf, w.pos) catch |err| {
w.err = err;
return error.WriteFailed;
};
w.pos += n;
return io_w.consume(n);
}
const n = windows.WriteFile(handle, data[0], null) catch |err| {
const pattern = data[data.len - 1];
if (pattern.len == 0 or splat == 0) return 0;
const n = windows.WriteFile(handle, pattern, w.pos) catch |err| {
w.err = err;
return 0;
return error.WriteFailed;
};
w.pos += n;
return n;
return io_w.consume(n);
},
.streaming, .streaming_reading => {
if (buffered.len != 0) {
const n = windows.WriteFile(handle, buffered, null) catch |err| {
w.err = err;
return error.WriteFailed;
};
w.pos += n;
return io_w.consume(n);
}
for (data[0 .. data.len - 1]) |buf| {
if (buf.len == 0) continue;
const n = windows.WriteFile(handle, buf, null) catch |err| {
w.err = err;
return error.WriteFailed;
};
w.pos += n;
return io_w.consume(n);
}
const pattern = data[data.len - 1];
if (pattern.len == 0 or splat == 0) return 0;
const n = windows.WriteFile(handle, pattern, null) catch |err| {
std.debug.print("windows write file failed3: {t}\n", .{err});
w.err = err;
return error.WriteFailed;
};
w.pos += n;
return io_w.consume(n);
},
.failure => return error.WriteFailed,
};