On Fri, Sep 30, 2016 at 11:15 PM, Alex Yursha <alexyursha@gmail.com> wrote: > I'm looking for the place where `tolower` function is defined in glibc. Look in ctype/ctype.c: int tolower (int c) { return c >= -128 && c < 256 ? __ctype_tolower[c] : c; } -- Paul Pluzhnikov