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Cleanse usage of some unsafe functions on win32

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This commit is contained in:
Brian Anderson 2011-10-12 16:42:13 -07:00
parent e8a0e592da
commit 6e67c4b253
1 changed files with 5 additions and 1 deletions
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6
src/lib/generic_os.rs
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@ -38,14 +38,18 @@ fn getenv(n: str) -> option::t<str> {
let res =
str::as_buf(n,
{|nbuf|
unsafe {
let vbuf = vec::to_ptr(v);
os::kernel32::GetEnvironmentVariableA(nbuf, vbuf,
nsize)
}
});
if res == 0u {
ret option::none;
} else if res < nsize {
vec::unsafe::set_len(v, res);
unsafe {
vec::unsafe::set_len(v, res);
}
ret option::some(str::unsafe_from_bytes(v));
} else { nsize = res; }
}