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std: Use truncating cast in WIFSTOPPED for Linux, FreeBSD and DragonFly

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The intermediate value can be larger than an u16, so @truncate is needed
to match the behavior of musl.
This commit is contained in:
Philip Åkesson 2021-08-24 21:34:43 +02:00 committed by Andrew Kelley
parent 3b9ec4e4df
commit 4f0aa7d639
3 changed files with 3 additions and 3 deletions
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2
lib/std/os/bits/dragonfly.zig
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@ -348,7 +348,7 @@ pub fn WIFEXITED(s: u32) bool {
return WTERMSIG(s) == 0;
}
pub fn WIFSTOPPED(s: u32) bool {
return @intCast(u16, (((s & 0xffff) *% 0x10001) >> 8)) > 0x7f00;
return @truncate(u16, (((s & 0xffff) *% 0x10001) >> 8)) > 0x7f00;
}
pub fn WIFSIGNALED(s: u32) bool {
return (s & 0xffff) -% 1 < 0xff;

2
lib/std/os/bits/freebsd.zig
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@ -741,7 +741,7 @@ pub fn WIFEXITED(s: u32) bool {
return WTERMSIG(s) == 0;
}
pub fn WIFSTOPPED(s: u32) bool {
return @intCast(u16, (((s & 0xffff) *% 0x10001) >> 8)) > 0x7f00;
return @truncate(u16, (((s & 0xffff) *% 0x10001) >> 8)) > 0x7f00;
}
pub fn WIFSIGNALED(s: u32) bool {
return (s & 0xffff) -% 1 < 0xff;

2
lib/std/os/bits/linux.zig
View File

@ -1066,7 +1066,7 @@ pub fn WIFEXITED(s: u32) bool {
return WTERMSIG(s) == 0;
}
pub fn WIFSTOPPED(s: u32) bool {
return @intCast(u16, ((s & 0xffff) *% 0x10001) >> 8) > 0x7f00;
return @truncate(u16, ((s & 0xffff) *% 0x10001) >> 8) > 0x7f00;
}
pub fn WIFSIGNALED(s: u32) bool {
return (s & 0xffff) -% 1 < 0xff;