tree 424020a8db5b7574393d23d20c1b545022af500d
parent f4ef9a53deb5ecaf70f91ccae30a75f6464aad29
author Elliott Hughes <enh@google.com> 1720661028 +0000
committer Elliott Hughes <enh@google.com> 1720661216 +0000

towctrans() should return the input and set errno on failure.

POSIX says that towctrans() and towctrans_l() "return wc unchanged" on failure. We were returning 0 instead.

Technically, POSIX says that errno _may_ be set if the wctrans_t argument is invalid, which is presumably why musl/glibc do nothing. But FreeBSD (and thus iOS) set errno to EINVAL, and bionic was already setting errno to EINVAL for wctrans(), so let's be consistent with ourselves and the OS that folks are most likely to be porting code to/from.

(Noticed by inspection.)

Change-Id: I63e252d588ddfb7c6ead58d04c690d7b85f23374