xz compression detection: avoid the need to seek

[oweals/busybox.git] / include / unicode.h

diff --git a/include/unicode.h b/include/unicode.h
index be64a50e255affc7bd695273447bd1cdfd618b04..e9e2bd14a7dda49de36c90714fd8b84c92762c05 100644 (file)
--- a/include/unicode.h
+++ b/include/unicode.h
@@ -5,24 +5,79 @@
 #ifndef UNICODE_H
 #define UNICODE_H 1
 
-#if !ENABLE_FEATURE_ASSUME_UNICODE
+#if ENABLE_UNICODE_USING_LOCALE
+# include <wchar.h>
+# include <wctype.h>
+#endif
+
+PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
+
+enum {
+       UNICODE_UNKNOWN = 0,
+       UNICODE_OFF = 1,
+       UNICODE_ON = 2,
+};
+
+#define unicode_bidi_isrtl(wc) 0
+#define unicode_bidi_is_neutral_wchar(wc) (wc <= 126 && !isalpha(wc))
+
+#if !ENABLE_UNICODE_SUPPORT
 
-# define check_unicode_in_env() ((void)0)
+# define unicode_strlen(string)   strlen(string)
+# define unicode_strwidth(string) strlen(string)
+# define unicode_status UNICODE_OFF
+# define init_unicode() ((void)0)
 
 #else
 
-# if ENABLE_LOCALE_SUPPORT
+# if CONFIG_LAST_SUPPORTED_WCHAR < 126 || CONFIG_LAST_SUPPORTED_WCHAR >= 0x30000
+#  undef CONFIG_LAST_SUPPORTED_WCHAR
+#  define CONFIG_LAST_SUPPORTED_WCHAR 0x2ffff
+# endif
+
+# if CONFIG_LAST_SUPPORTED_WCHAR < 0x300
+#  undef ENABLE_UNICODE_COMBINING_WCHARS
+#  define ENABLE_UNICODE_COMBINING_WCHARS 0
+# endif
+
+# if CONFIG_LAST_SUPPORTED_WCHAR < 0x1100
+#  undef ENABLE_UNICODE_WIDE_WCHARS
+#  define ENABLE_UNICODE_WIDE_WCHARS 0
+# endif
+
+# if CONFIG_LAST_SUPPORTED_WCHAR < 0x590
+#  undef  ENABLE_UNICODE_BIDI_SUPPORT
+#  define ENABLE_UNICODE_BIDI_SUPPORT 0
+# endif
+
+/* Number of unicode chars. Falls back to strlen() on invalid unicode */
+size_t FAST_FUNC unicode_strlen(const char *string);
+/* Width on terminal */
+size_t FAST_FUNC unicode_strwidth(const char *string);
+enum {
+       UNI_FLAG_PAD = (1 << 0),
+};
+//UNUSED: unsigned FAST_FUNC unicode_padding_to_width(unsigned width, const char *src);
+//UNUSED: char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags);
+char* FAST_FUNC unicode_conv_to_printable(uni_stat_t *stats, const char *src);
+char* FAST_FUNC unicode_conv_to_printable_maxwidth(uni_stat_t *stats, const char *src, unsigned maxwidth);
+char* FAST_FUNC unicode_conv_to_printable_fixedwidth(uni_stat_t *stats, const char *src, unsigned width);
 
-#  include <wchar.h>
-#  include <wctype.h>
-#  define check_unicode_in_env() ((void)0)
+# if ENABLE_UNICODE_USING_LOCALE
+
+extern uint8_t unicode_status;
+void init_unicode(void) FAST_FUNC;
 
 # else
 
+/* Homegrown Unicode support. It knows only C and Unicode locales. */
+
 #  if !ENABLE_FEATURE_CHECK_UNICODE_IN_ENV
-#   define check_unicode_in_env() ((void)0)
+#   define unicode_status UNICODE_ON
+#   define init_unicode() ((void)0)
 #  else
-void check_unicode_in_env(void) FAST_FUNC;
+extern uint8_t unicode_status;
+void init_unicode(void) FAST_FUNC;
 #  endif
 
 #  undef MB_CUR_MAX
@@ -37,6 +92,7 @@ void check_unicode_in_env(void) FAST_FUNC;
 #  define iswspace  bb_iswspace
 #  define iswalnum  bb_iswalnum
 #  define iswpunct  bb_iswpunct
+#  define wcwidth   bb_wcwidth
 
 typedef int32_t wint_t;
 typedef struct {
@@ -49,9 +105,21 @@ size_t wcrtomb(char *s, wchar_t wc, mbstate_t *ps) FAST_FUNC;
 int iswspace(wint_t wc) FAST_FUNC;
 int iswalnum(wint_t wc) FAST_FUNC;
 int iswpunct(wint_t wc) FAST_FUNC;
+int wcwidth(unsigned ucs) FAST_FUNC;
+#  if ENABLE_UNICODE_BIDI_SUPPORT
+#   undef unicode_bidi_isrtl
+int unicode_bidi_isrtl(wint_t wc) FAST_FUNC;
+#   if ENABLE_UNICODE_NEUTRAL_TABLE
+#    undef unicode_bidi_is_neutral_wchar
+int unicode_bidi_is_neutral_wchar(wint_t wc) FAST_FUNC;
+#   endif
+#  endif
 
-# endif
 
-#endif
+# endif /* !UNICODE_USING_LOCALE */
+
+#endif /* UNICODE_SUPPORT */
+
+POP_SAVED_FUNCTION_VISIBILITY
 
 #endif