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std: support / in Windows paths

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This commit is contained in:
Andrew Kelley 2020-04-27 13:39:06 -04:00
parent 41e17106cd
commit 1e04e85200
1 changed files with 12 additions and 7 deletions
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19
lib/std/os/windows.zig
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@ -1260,15 +1260,9 @@ pub fn wToPrefixedFileW(s: []const u16) ![PATH_MAX_WIDE:0]u16 {
pub fn sliceToPrefixedSuffixedFileW(s: []const u8, comptime suffix: []const u16) ![PATH_MAX_WIDE + suffix.len:0]u16 {
// TODO https://github.com/ziglang/zig/issues/2765
var result: [PATH_MAX_WIDE + suffix.len:0]u16 = undefined;
// > File I/O functions in the Windows API convert "/" to "\" as part of
// > converting the name to an NT-style name, except when using the "\\?\"
// > prefix as detailed in the following sections.
// from https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation
// Because we want the larger maximum path length for absolute paths, we
// disallow forward slashes in zig std lib file functions on Windows.
for (s) |byte| {
switch (byte) {
'/', '*', '?', '"', '<', '>', '|' => return error.BadPathName,
'*', '?', '"', '<', '>', '|' => return error.BadPathName,
else => {},
}
}
@ -1279,6 +1273,17 @@ pub fn sliceToPrefixedSuffixedFileW(s: []const u8, comptime suffix: []const u16)
};
const end_index = start_index + try std.unicode.utf8ToUtf16Le(result[start_index..], s);
if (end_index + suffix.len > result.len) return error.NameTooLong;
// > File I/O functions in the Windows API convert "/" to "\" as part of
// > converting the name to an NT-style name, except when using the "\\?\"
// > prefix as detailed in the following sections.
// from https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation
// Because we want the larger maximum path length for absolute paths, we
// convert forward slashes to backward slashes here.
for (result[0..end_index]) |*elem| {
if (elem.* == '/') {
elem.* = '\\';
}
}
mem.copy(u16, result[end_index..], suffix);
result[end_index + suffix.len] = 0;
return result;