HelenOS sources

tolower           109 common/stdc/ctype.c int tolower(int c)
tolower           109 kernel/generic/common/stdc/ctype.c int tolower(int c)
tolower           109 uspace/lib/c/common/stdc/ctype.c int tolower(int c)
tolower           107 uspace/lib/cpp/include/__bits/locale/ctype.hpp             char_type tolower(char_type c) const
tolower           112 uspace/lib/cpp/include/__bits/locale/ctype.hpp             const char_type* tolower(char_type* low, const char_type* high) const
tolower           298 uspace/lib/cpp/include/__bits/locale/ctype.hpp             char_type tolower(char_type c) const
tolower           303 uspace/lib/cpp/include/__bits/locale/ctype.hpp             const char_type* tolower(char_type* low, const char_type* high) const
tolower           482 uspace/lib/cpp/include/__bits/locale/ctype.hpp             char_type tolower(char_type c) const
tolower           487 uspace/lib/cpp/include/__bits/locale/ctype.hpp             const char_type* tolower(char_type* low, const char_type* high) const
tolower           147 uspace/lib/cpp/include/__bits/locale/locale_misc.hpp     Char tolower(Char c, const locale& loc)