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User-configurable
UCLIBC_HAS_CTYPE_TABLES
Make toupper etc work thru translation tables
and isalhum etc thru lookup tables. Help says:
"While the non-table versions are often smaller when building
statically linked apps, they work only in stub locale mode."
"stub locale mode" is when !UCLIBC_HAS_LOCALE I presume,
when we are permanently in POSIX/C locale.
UCLIBC_HAS_CTYPE_SIGNED
Handle sign-extended chars. I.e. if you want
toupper((char)0xa0) => toupper(0xffffffa0) => still works correctly,
as if toupper(0xa0) was called.
UCLIBC_HAS_CTYPE_UNSAFE/CHECKED/ENFORCED
Do not check ctype function argument's range/check it and return
error/check it and abort(). Help says:
NOTE: This only affects the 'ctype' _functions_. It does not affect
the macro implementations. [so what happens to macros?]
[examples?]
UCLIBC_HAS_WCHAR
Wide character support. I assume all those wchar_t types and functions
UCLIBC_HAS_LOCALE/XLOCALE
Support locale / extended locale
UCLIBC_PREGENERATED_LOCALE_DATA
Not recommended
uclibc internal machinery
__LOCALE_C_ONLY
#defined if !UCLIBC_HAS_LOCALE
__NO_CTYPE
#defined only by some .c files. Prevents ctype macros to be #defined
(those w/o underscores. __ctype() macros will still be defined).
Looks like user is expected to never mess with defining it.
__UCLIBC_DO_XLOCALE
#defined only by some .c files. Looks like user is expected to never
mess with defining it.
__XL_NPP(N) - "add _l suffix if locale support is on"
#defined to N ## _l if __UCLIBC_HAS_XLOCALE__ && __UCLIBC_DO_XLOCALE,
else #defined to just N.
__CTYPE_HAS_8_BIT_LOCALES
__CTYPE_HAS_UTF_8_LOCALES
Depends on contents of extra/locale/LOCALES data file. Looks like
both will be set if UCLIBC_HAS_LOCALE and extra/locale/LOCALES
is not edited.
__WCHAR_ENABLED
locale_mmap.h defines it unconditionally, extra/locale/gen_ldc.c
defines it too with a warning, and _then_ includes locale_mmap.h.
Makefile seems to prevent the warning in gen_ldc.c:
ifeq ($(UCLIBC_HAS_WCHAR),y)
BUILD_CFLAGS-gen_wc8bit += -DDO_WIDE_CHAR=1
BUILD_CFLAGS-gen_ldc += -D__WCHAR_ENABLED=1
endif
A mess. Why they can't just use __UCLIBC_HAS_WCHAR__?
__WCHAR_REPLACEMENT_CHAR
Never defined (dead code???)
Actual ctype macros are a bloody mess!
ctype.h
...
...
#define __isctype(c, type) \
((__UCLIBC_CTYPE_B)[(int) (c)] & (__ctype_mask_t) type)
#define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
#define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
#define __isdigit_char(C) (((unsigned char)((C) - '0')) <= 9)
#define __isdigit_int(C) (((unsigned int)((C) - '0')) <= 9)
# define isalnum(c) __isctype((c), _ISalnum)
# define isalpha(c) __isctype((c), _ISalpha)
# if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
# define tolower(c) __tobody (c, tolower, __UCLIBC_CTYPE_TOLOWER, (c))
# define toupper(c) __tobody (c, toupper, __UCLIBC_CTYPE_TOUPPER, (c))
# endif /* Optimizing gcc */
# if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
# define isascii(c) __isascii (c)
# define toascii(c) __toascii (c)
# define _tolower(c) ((int) (__UCLIBC_CTYPE_TOLOWER)[(int) (c)])
# define _toupper(c) ((int) (__UCLIBC_CTYPE_TOUPPER)[(int) (c)])
# endif
...
...
bits/uClibc_ctype.h
...
...
#define __tolower(c) __body(tolower,c)
#define __toupper(c) __body(toupper,c)
#define _toupper(c) ((c) ^ 0x20)
#define _tolower(c) ((c) | 0x20)
...
...
WTF?! We have (at least) TWO DIFFERENT _tolower's?
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