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@@ -0,0 +1,114 @@
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+ User-configurable
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+
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+UCLIBC_HAS_CTYPE_TABLES
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+ Make toupper etc work thru translation tables
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+ and isalhum etc thru lookup tables. Help says:
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+ "While the non-table versions are often smaller when building
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+ statically linked apps, they work only in stub locale mode."
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+
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+ "stub locale mode" is when !UCLIBC_HAS_LOCALE I presume,
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+ when we are permanently in POSIX/C locale.
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+
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+UCLIBC_HAS_CTYPE_SIGNED
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+ Handle sign-extended chars. I.e. if you want
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+ toupper((char)0xa0) => toupper(0xffffffa0) => still works correctly,
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+ as if toupper(0xa0) was called.
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+
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+UCLIBC_HAS_CTYPE_UNSAFE/CHECKED/ENFORCED
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+ Do not check ctype function argument's range/check it and return
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+ error/check it and abort(). Help says:
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+ NOTE: This only affects the 'ctype' _functions_. It does not affect
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+ the macro implementations. [so what happens to macros?]
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+ [examples?]
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+
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+UCLIBC_HAS_WCHAR
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+ Wide character support. I assume all those wchar_t types and functions
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+
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+UCLIBC_HAS_LOCALE/XLOCALE
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+ Support locale / extended locale
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+
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+UCLIBC_PREGENERATED_LOCALE_DATA
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+ Not recommended
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+
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+
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+ uclibc internal machinery
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+
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+__LOCALE_C_ONLY
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+ #defined if !UCLIBC_HAS_LOCALE
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+
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+__NO_CTYPE
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+ #defined only by some .c files. Prevents ctype macros to be #defined
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+ (those w/o underscores. __ctype() macros will still be defined).
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+ Looks like user is expected to never mess with defining it.
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+
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+__UCLIBC_DO_XLOCALE
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+ #defined only by some .c files. Looks like user is expected to never
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+ mess with defining it.
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+
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+__XL_NPP(N) - "add _l suffix if locale support is on"
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+ #defined to N ## _l if __UCLIBC_HAS_XLOCALE__ && __UCLIBC_DO_XLOCALE,
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+ else #defined to just N.
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+
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+__CTYPE_HAS_8_BIT_LOCALES
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+__CTYPE_HAS_UTF_8_LOCALES
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+ Depends on contents of extra/locale/LOCALES data file. Looks like
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+ both will be set if UCLIBC_HAS_LOCALE and extra/locale/LOCALES
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+ is not edited.
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+
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+__WCHAR_ENABLED
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+ locale_mmap.h defines it unconditionally, extra/locale/gen_ldc.c
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+ defines it too with a warning, and _then_ includes locale_mmap.h.
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+ Makefile seems to prevent the warning in gen_ldc.c:
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+ ifeq ($(UCLIBC_HAS_WCHAR),y)
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+ BUILD_CFLAGS-gen_wc8bit += -DDO_WIDE_CHAR=1
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+ BUILD_CFLAGS-gen_ldc += -D__WCHAR_ENABLED=1
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+ endif
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+ A mess. Why they can't just use __UCLIBC_HAS_WCHAR__?
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+
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+__WCHAR_REPLACEMENT_CHAR
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+ Never defined (dead code???)
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+
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+
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+
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+ Actual ctype macros are a bloody mess!
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+
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+ctype.h
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+...
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+...
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+#define __isctype(c, type) \
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+ ((__UCLIBC_CTYPE_B)[(int) (c)] & (__ctype_mask_t) type)
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+
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+#define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
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+#define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
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+#define __isdigit_char(C) (((unsigned char)((C) - '0')) <= 9)
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+#define __isdigit_int(C) (((unsigned int)((C) - '0')) <= 9)
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+
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+# define isalnum(c) __isctype((c), _ISalnum)
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+# define isalpha(c) __isctype((c), _ISalpha)
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+
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+# if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
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+# define tolower(c) __tobody (c, tolower, __UCLIBC_CTYPE_TOLOWER, (c))
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+# define toupper(c) __tobody (c, toupper, __UCLIBC_CTYPE_TOUPPER, (c))
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+# endif /* Optimizing gcc */
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+
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+# if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
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+# define isascii(c) __isascii (c)
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+# define toascii(c) __toascii (c)
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+# define _tolower(c) ((int) (__UCLIBC_CTYPE_TOLOWER)[(int) (c)])
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+# define _toupper(c) ((int) (__UCLIBC_CTYPE_TOUPPER)[(int) (c)])
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+# endif
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+...
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+...
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+
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+bits/uClibc_ctype.h
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+...
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+...
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+#define __tolower(c) __body(tolower,c)
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+#define __toupper(c) __body(toupper,c)
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+
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+#define _toupper(c) ((c) ^ 0x20)
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+#define _tolower(c) ((c) | 0x20)
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+...
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+...
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+
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+WTF?! We have (at least) TWO DIFFERENT _tolower's?
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