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- Affects the following functions:
+ `std.fs.Dir.readLinkW`
+ `std.os.windows.ReadLink`
+ `std.os.windows.ntToWin32Namespace`
+ `std.posix.readlinkW`
+ `std.posix.readlinkatW`
Each of these functions (except `ntToWin32Namespace`) took WTF-16 as input and would output WTF-8, which makes optimal buffer re-use difficult at callsites and could force unnecessary WTF-16 <-> WTF-8 conversion during an intermediate step.
The functions have been updated to output WTF-16, and also allow for the path and the output to re-use the same buffer (i.e. in-place modification), which can reduce the stack usage at callsites. For example, all of `std.fs.Dir.readLink`/`readLinkZ`/`std.posix.readlink`/`readlinkZ`/`readlinkat`/`readlinkatZ` have had their stack usage reduced by one PathSpace struct (64 KiB) when targeting Windows.
The new `ntToWin32Namespace` takes an output buffer and returns a slice from that instead of returning a PathSpace, which is necessary to make the above possible.
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The reasoning in the comment deleted by this commit no longer applies, since that same benefit can be obtained by using OpenFile with `.filter = .any`.
Also removes a stray debug.print
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rename Cancelled to Canceled
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missing a call to wToPrefixedFileW
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- ILSEQ -> error.BadPathName
- implement dirStatPath for WASI
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The compile-time check against the minimum version here wasn't appropriate, since it still makes sense to try using FILE_RENAME_INFORMATION_EX even if the minimum version is something like `xp`, since that doesn't rule out the possibility of the compiled code running on Windows 10/11. This compile-time check was doubly bad since the default minimum windows version (`.win10`) was below the `.win10_rs5` that was checked for, so when providing a target like `x86_64-windows-gnu` it'd always rule out using this syscall.
After this commit, we always try using FILE_RENAME_INFORMATION_EX and then let the operating system tell us when some aspect of it is not supported. This allows us to get the benefits of these new syscalls/flags whenever it's actually possible.
The possible error returns were validated experimentally:
- INVALID_PARAMETER is returned when the underlying filesystem is FAT32
- INVALID_INFO_CLASS is returned on Windows 7 when trying to use FileRenameInformationEx/FileDispositionInformationEx
- NOT_SUPPORTED is returned on Windows 10 >= .win10_rs5 when setting a bogus flag value (I used `0x1000`)
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This was causing flaky CI failures.
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src/crash_handler.zig is still TODO though, i am planning bigger changes there
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Closes #23666.
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zig fmt: canonicalize nested cast builtin order
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These regressed with 1a998886c863a1829d649f196093f1058cd9cf13
I'm not ready to tackle std.posix quite yet
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Basically everything that has a direct replacement or no uses left.
Notable omissions:
- std.ArrayHashMap: Too much fallout, needs a separate cleanup.
- std.debug.runtime_safety: Too much fallout.
- std.heap.GeneralPurposeAllocator: Lots of references to it remain, not
a simple find and replace as "debug allocator" is not equivalent to
"general purpose allocator".
- std.io.Reader: Is being reworked at the moment.
- std.unicode.utf8Decode(): No replacement, needs a new API first.
- Manifest backwards compat options: Removal would break test data used
by TestFetchBuilder.
- panic handler needs to be a namespace: Many tests still rely on it
being a function, needs a separate cleanup.
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added adapter to AnyWriter and GenericWriter to help bridge the gap
between old and new API
make std.testing.expectFmt work at compile-time
std.fmt no longer has a dependency on std.unicode. Formatted printing
was never properly unicode-aware. Now it no longer pretends to be.
Breakage/deprecations:
* std.fs.File.reader -> std.fs.File.deprecatedReader
* std.fs.File.writer -> std.fs.File.deprecatedWriter
* std.io.GenericReader -> std.io.Reader
* std.io.GenericWriter -> std.io.Writer
* std.io.AnyReader -> std.io.Reader
* std.io.AnyWriter -> std.io.Writer
* std.fmt.format -> std.fmt.deprecatedFormat
* std.fmt.fmtSliceEscapeLower -> std.ascii.hexEscape
* std.fmt.fmtSliceEscapeUpper -> std.ascii.hexEscape
* std.fmt.fmtSliceHexLower -> {x}
* std.fmt.fmtSliceHexUpper -> {X}
* std.fmt.fmtIntSizeDec -> {B}
* std.fmt.fmtIntSizeBin -> {Bi}
* std.fmt.fmtDuration -> {D}
* std.fmt.fmtDurationSigned -> {D}
* {} -> {f} when there is a format method
* format method signature
- anytype -> *std.io.Writer
- inferred error set -> error{WriteFailed}
- options -> (deleted)
* std.fmt.Formatted
- now takes context type explicitly
- no fmt string
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These functions have been unused for a long time (since cfffb9c5e96eeeae43cd724e2d02ec8c2b7714e0; the PEB is used for this stuff now), and the GetEnvironmentVariableW wrapper's parameter types don't make much sense to boot.
Contributes towards:
- https://github.com/ziglang/zig/issues/4426
- https://github.com/ziglang/zig/issues/1840
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Closes #23690.
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a read or write is attempted on a disconnected virtual com port
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Windows: Faster `getenvW` and a standalone environment variable test
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Adds a CreateProcessFlags packed struct for all the possible flags to
CreateProcessW on windows. In addition, propagates the existing
`start_suspended` option in std.process.Child which was previously only
used on Darwin. Also adds a `create_no_window` option to std.process.Child
which is a commonly used flag for launching console executables on
windows without causing a new console window to "pop up".
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Windows defines an `ACCESS_DENIED` error code. There is no
PERMISSION_DENIED (or its equivalent) which seems to only exist on POSIX
systems. Fix a couple Windows calls code to return `error.AccessDenied`
for `ACCESS_DENIED` and to stop mapping AccessDenied into
PermissionDenied.
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missing alloction constants MEM_RESERVE_PLACEHOLDER / MEM_PRESERVE_PLACEHOLDER
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Windows-only, depends on kernel32 in violation of zig std lib policy,
and redundant with other cross-platform APIs that perform the same
functionality.
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- effects FreeBSD memfd and Windows DeleteFile
- regression: e5d5a8bc4ea6b27dc3540ad4800a1231ff50b33d
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This rewrite improves some error messages, hugely simplifies the logic,
and fixes several bugs. One of these bugs is technically a new rule
which Andrew and I agreed on: if a parameter has a comptime-only type
but is not declared `comptime`, then the corresponding call argument
should not be *evaluated* at comptime; only resolved. Implementing this
required changing how function types work a little, which in turn
required allowing a new kind of function coercion for some generic use
cases: function coercions are now allowed to implicitly *remove*
`comptime` annotations from parameters with comptime-only types. This is
okay because removing the annotation affects only the call site.
Resolves: #22262
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(#21938)
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See: #20505, #21094
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* Make it work for thumb and aarch64.
* Clean up std.os.windows.teb() a bit.
I also updated stage1/zig.h since the changes are backwards-compatible and are
necessary due to the std.os.windows changes that call the newly-added functions.
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Closes #21869.
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