diff options
Diffstat (limited to 'libbb/unicode_wcwidth.c')
| -rw-r--r-- | libbb/unicode_wcwidth.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/libbb/unicode_wcwidth.c b/libbb/unicode_wcwidth.c index 8d301f7..ab62b18 100644 --- a/libbb/unicode_wcwidth.c +++ b/libbb/unicode_wcwidth.c @@ -59,6 +59,13 @@ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c */ +#if CONFIG_LAST_SUPPORTED_WCHAR == 0 +# define LAST_SUPPORTED_WCHAR ((1 << 31) - 1) +#else +# define LAST_SUPPORTED_WCHAR CONFIG_LAST_SUPPORTED_WCHAR +#endif + +#if LAST_SUPPORTED_WCHAR >= 0x0300 struct interval { uint16_t first; uint16_t last; @@ -111,6 +118,7 @@ static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max) } return 0; } +#endif /* The following two functions define the column width of an ISO 10646 @@ -146,6 +154,7 @@ static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max) */ static int wcwidth(unsigned ucs) { +#if LAST_SUPPORTED_WCHAR >= 0x0300 /* sorted list of non-overlapping intervals of non-spacing characters */ /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ static const struct interval combining[] = { @@ -420,12 +429,15 @@ static int wcwidth(unsigned ucs) #undef BIG_ #undef PAIR }; +# if LAST_SUPPORTED_WCHAR >= 0x1100 static const struct interval combining0x10000[] = { { 0x0A01, 0x0A03 }, { 0x0A05, 0x0A06 }, { 0x0A0C, 0x0A0F }, { 0x0A38, 0x0A3A }, { 0x0A3F, 0x0A3F }, { 0xD167, 0xD169 }, { 0xD173, 0xD182 }, { 0xD185, 0xD18B }, { 0xD1AA, 0xD1AD }, { 0xD242, 0xD244 } }; +# endif +#endif if (ucs == 0) return 0; @@ -435,6 +447,9 @@ static int wcwidth(unsigned ucs) if (ucs < 0x0300) /* optimization */ return 1; +#if LAST_SUPPORTED_WCHAR < 0x0300 + return -1; +#else /* binary search in table of non-spacing characters */ if (in_interval_table(ucs, combining, ARRAY_SIZE(combining) - 1)) return 0; @@ -444,6 +459,9 @@ static int wcwidth(unsigned ucs) if (ucs < 0x1100) /* optimization */ return 1; +# if LAST_SUPPORTED_WCHAR < 0x1100 + return -1; +# else /* binary search in table of non-spacing characters, cont. */ if (in_interval_table(ucs ^ 0x10000, combining0x10000, ARRAY_SIZE(combining0x10000) - 1)) return 0; @@ -458,8 +476,8 @@ static int wcwidth(unsigned ucs) return 1 + ( (/*ucs >= 0x1100 &&*/ ucs <= 0x115f) /* Hangul Jamo init. consonants */ - || ucs == 0x2329 - || ucs == 0x232a + || ucs == 0x2329 /* left-pointing angle bracket; also CJK punct. char */ + || ucs == 0x232a /* right-pointing angle bracket; also CJK punct. char */ || (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) /* CJK ... Yi */ || (ucs >= 0xac00 && ucs <= 0xd7a3) /* Hangul Syllables */ || (ucs >= 0xf900 && ucs <= 0xfaff) /* CJK Compatibility Ideographs */ @@ -470,4 +488,6 @@ static int wcwidth(unsigned ucs) || (ucs >= 0x20000 && ucs <= 0x2fffd) || (ucs >= 0x30000 && ucs <= 0x3fffd) ); +# endif +#endif } |