diff options
Diffstat (limited to 'newlib/libc/ctype/tolower.c')
| -rw-r--r-- | newlib/libc/ctype/tolower.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/newlib/libc/ctype/tolower.c b/newlib/libc/ctype/tolower.c index bdd22bfc5..66ba7233c 100644 --- a/newlib/libc/ctype/tolower.c +++ b/newlib/libc/ctype/tolower.c @@ -46,10 +46,31 @@ No supporting OS subroutines are required. #include <_ansi.h> #include <ctype.h> +#if defined (_MB_EXTENDED_CHARSETS_ISO) || defined (_MB_EXTENDED_CHARSETS_WINDOWS) +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <wctype.h> +#include <wchar.h> +#endif #undef tolower int _DEFUN(tolower,(c),int c) { - return isupper(c) ? (c) - 'A' + 'a' : c; +#if defined (_MB_EXTENDED_CHARSETS_ISO) || defined (_MB_EXTENDED_CHARSETS_WINDOWS) + if ((unsigned char) c <= 0x7f) + return isupper (c) ? c - 'A' + 'a' : c; + else if (c != EOF && MB_CUR_MAX == 1 && isupper (c)) + { + char s[MB_LEN_MAX] = { c, '\0' }; + wchar_t wc; + if (mbtowc (&wc, s, 1) >= 0 + && wctomb (s, (wchar_t) towlower ((wint_t) wc)) == 1) + c = s[0]; + } + return c; +#else + return isupper(c) ? (c) - 'A' + 'a' : c; +#endif } |