/* vi: set sw=4 ts=4: */ /* * Unicode support routines. * * Copyright (C) 2009 Denys Vlasenko * * Licensed under GPLv2, see file LICENSE in this source tree. */ #include "libbb.h" #include "unicode.h" /* If it's not #defined as a constant in unicode.h... */ #ifndef unicode_status uint8_t unicode_status; #endif /* This file is compiled only if UNICODE_SUPPORT is on. * We check other options and decide whether to use libc support * via locale, or use our own logic: */ #if ENABLE_UNICODE_USING_LOCALE /* Unicode support using libc locale support. */ void FAST_FUNC reinit_unicode(const char *LANG) { static const char unicode_0x394[] = { 0xce, 0x94, 0 }; size_t width; /* We pass "" instead of "C" because some libc's have * non-ASCII default locale for setlocale("") call * (this allows users of such libc to have Unicoded * system without having to mess with env). * * We set LC_CTYPE because (a) we may be called with $LC_CTYPE * value in LANG, not with $LC_ALL, (b) internationalized * LC_NUMERIC and LC_TIME are more PITA than benefit * (for one, some utilities have hard time with comma * used as a fractional separator). */ //TODO: avoid repeated calls by caching last string? setlocale(LC_CTYPE, LANG ? LANG : ""); /* In unicode, this is a one character string */ width = unicode_strlen(unicode_0x394); unicode_status = (width == 1 ? UNICODE_ON : UNICODE_OFF); } void FAST_FUNC init_unicode(void) { /* Some people set only $LC_CTYPE, not $LC_ALL, because they want * only Unicode to be activated on their system, not the whole * shebang of wrong decimal points, strange date formats and so on. */ if (unicode_status == UNICODE_UNKNOWN) { char *s = getenv("LC_ALL"); if (!s) s = getenv("LC_CTYPE"); if (!s) s = getenv("LANG"); reinit_unicode(s); } } #else /* Homegrown Unicode support. It knows only C and Unicode locales. */ # if ENABLE_FEATURE_CHECK_UNICODE_IN_ENV void FAST_FUNC reinit_unicode(const char *LANG) { unicode_status = UNICODE_OFF; if (!LANG || !(strstr(LANG, ".utf") || strstr(LANG, ".UTF"))) return; unicode_status = UNICODE_ON; } void FAST_FUNC init_unicode(void) { if (unicode_status == UNICODE_UNKNOWN) { char *s = getenv("LC_ALL"); if (!s) s = getenv("LC_CTYPE"); if (!s) s = getenv("LANG"); reinit_unicode(s); } } # endif static size_t wcrtomb_internal(char *s, wchar_t wc) { int n, i; uint32_t v = wc; if (v <= 0x7f) { *s = v; return 1; } /* RFC 3629 says that Unicode ends at 10FFFF, * but we cover entire 32 bits */ /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */ /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */ /* 80-7FF -> 110yyyxx 10xxxxxx */ /* How many bytes do we need? */ n = 2; /* (0x80000000+ would result in n = 7, limiting n to 6) */ while (v >= 0x800 && n < 6) { v >>= 5; n++; } /* Fill bytes n-1..1 */ i = n; while (--i) { s[i] = (wc & 0x3f) | 0x80; wc >>= 6; } /* Fill byte 0 */ s[0] = wc | (uint8_t)(0x3f00 >> n); return n; } size_t FAST_FUNC wcrtomb(char *s, wchar_t wc, mbstate_t *ps UNUSED_PARAM) { if (unicode_status != UNICODE_ON) { *s = wc; return 1; } return wcrtomb_internal(s, wc); } size_t FAST_FUNC wcstombs(char *dest, const wchar_t *src, size_t n) { size_t org_n = n; if (unicode_status != UNICODE_ON) { while (n) { wchar_t c = *src++; *dest++ = c; if (c == 0) break; n--; } return org_n - n; } while (n >= MB_CUR_MAX) { wchar_t wc = *src++; size_t len = wcrtomb_internal(dest, wc); if (wc == L'\0') return org_n - n; dest += len; n -= len; } while (n) { char tbuf[MB_CUR_MAX]; wchar_t wc = *src++; size_t len = wcrtomb_internal(tbuf, wc); if (len > n) break; memcpy(dest, tbuf, len); if (wc == L'\0') return org_n - n; dest += len; n -= len; } return org_n - n; } # define ERROR_WCHAR (~(wchar_t)0) static const char *mbstowc_internal(wchar_t *res, const char *src) { int bytes; unsigned c = (unsigned char) *src++; if (c <= 0x7f) { *res = c; return src; } /* 80-7FF -> 110yyyxx 10xxxxxx */ /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */ /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */ /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ bytes = 0; do { c <<= 1; bytes++; } while ((c & 0x80) && bytes < 6); if (bytes == 1) { /* A bare "continuation" byte. Say, 80 */ *res = ERROR_WCHAR; return src; } c = (uint8_t)(c) >> bytes; while (--bytes) { unsigned ch = (unsigned char) *src; if ((ch & 0xc0) != 0x80) { /* Missing "continuation" byte. Example: e0 80 */ *res = ERROR_WCHAR; return src; } c = (c << 6) + (ch & 0x3f); src++; } /* TODO */ /* Need to check that c isn't produced by overlong encoding */ /* Example: 11000000 10000000 converts to NUL */ /* 11110000 10000000 10000100 10000000 converts to 0x100 */ /* correct encoding: 11000100 10000000 */ if (c <= 0x7f) { /* crude check */ *res = ERROR_WCHAR; return src; } *res = c; return src; } size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n) { size_t org_n = n; if (unicode_status != UNICODE_ON) { while (n) { unsigned char c = *src++; if (dest) *dest++ = c; if (c == 0) break; n--; } return org_n - n; } while (n) { wchar_t wc; src = mbstowc_internal(&wc, src); if (wc == ERROR_WCHAR) /* error */ return (size_t) -1L; if (dest) *dest++ = wc; if (wc == 0) /* end-of-string */ break; n--; } return org_n - n; } int FAST_FUNC iswspace(wint_t wc) { return (unsigned)wc <= 0x7f && isspace(wc); } int FAST_FUNC iswalnum(wint_t wc) { return (unsigned)wc <= 0x7f && isalnum(wc); } int FAST_FUNC iswpunct(wint_t wc) { return (unsigned)wc <= 0x7f && ispunct(wc); } # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300 struct interval { uint16_t first; uint16_t last; }; /* auxiliary function for binary search in interval table */ static int in_interval_table(unsigned ucs, const struct interval *table, unsigned max) { unsigned min; unsigned mid; if (ucs < table[0].first || ucs > table[max].last) return 0; min = 0; while (max >= min) { mid = (min + max) / 2; if (ucs > table[mid].last) min = mid + 1; else if (ucs < table[mid].first) max = mid - 1; else return 1; } return 0; } static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max) { unsigned min; unsigned mid; unsigned first, last; first = table[0] >> 2; last = first + (table[0] & 3); if (ucs < first || ucs > last) return 0; min = 0; while (max >= min) { mid = (min + max) / 2; first = table[mid] >> 2; last = first + (table[mid] & 3); if (ucs > last) min = mid + 1; else if (ucs < first) max = mid - 1; else return 1; } return 0; } # endif /* * This is an implementation of wcwidth() and wcswidth() (defined in * IEEE Std 1002.1-2001) for Unicode. * * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html * * In fixed-width output devices, Latin characters all occupy a single * "cell" position of equal width, whereas ideographic CJK characters * occupy two such cells. Interoperability between terminal-line * applications and (teletype-style) character terminals using the * UTF-8 encoding requires agreement on which character should advance * the cursor by how many cell positions. No established formal * standards exist at present on which Unicode character shall occupy * how many cell positions on character terminals. These routines are * a first attempt of defining such behavior based on simple rules * applied to data provided by the Unicode Consortium. * * For some graphical characters, the Unicode standard explicitly * defines a character-cell width via the definition of the East Asian * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes. * In all these cases, there is no ambiguity about which width a * terminal shall use. For characters in the East Asian Ambiguous (A) * class, the width choice depends purely on a preference of backward * compatibility with either historic CJK or Western practice. * Choosing single-width for these characters is easy to justify as * the appropriate long-term solution, as the CJK practice of * displaying these characters as double-width comes from historic * implementation simplicity (8-bit encoded characters were displayed * single-width and 16-bit ones double-width, even for Greek, * Cyrillic, etc.) and not any typographic considerations. * * Much less clear is the choice of width for the Not East Asian * (Neutral) class. Existing practice does not dictate a width for any * of these characters. It would nevertheless make sense * typographically to allocate two character cells to characters such * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be * represented adequately with a single-width glyph. The following * routines at present merely assign a single-cell width to all * neutral characters, in the interest of simplicity. This is not * entirely satisfactory and should be reconsidered before * establishing a formal standard in this area. At the moment, the * decision which Not East Asian (Neutral) characters should be * represented by double-width glyphs cannot yet be answered by * applying a simple rule from the Unicode database content. Setting * up a proper standard for the behavior of UTF-8 character terminals * will require a careful analysis not only of each Unicode character, * but also of each presentation form, something the author of these * routines has avoided to do so far. * * http://www.unicode.org/unicode/reports/tr11/ * * Markus Kuhn -- 2007-05-26 (Unicode 5.0) * * Permission to use, copy, modify, and distribute this software * for any purpose and without fee is hereby granted. The author * disclaims all warranties with regard to this software. * * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c */ /* Assigned Unicode character ranges: * Plane Range * 0 0000–FFFF Basic Multilingual Plane * 1 10000–1FFFF Supplementary Multilingual Plane * 2 20000–2FFFF Supplementary Ideographic Plane * 3 30000-3FFFF Tertiary Ideographic Plane (no chars assigned yet) * 4-13 40000–DFFFF currently unassigned * 14 E0000–EFFFF Supplementary Special-purpose Plane * 15 F0000–FFFFF Supplementary Private Use Area-A * 16 100000–10FFFF Supplementary Private Use Area-B * * "Supplementary Special-purpose Plane currently contains non-graphical * characters in two blocks of 128 and 240 characters. The first block * is for language tag characters for use when language cannot be indicated * through other protocols (such as the xml:lang attribute in XML). * The other block contains glyph variation selectors to indicate * an alternate glyph for a character that cannot be determined by context." * * In simpler terms: it is a tool to fix the "Han unification" mess * created by Unicode committee, to select Chinese/Japanese/Korean/Taiwan * version of a character. (They forgot that the whole purpose of the Unicode * was to be able to write all chars in one charset without such tricks). * Until East Asian users say it is actually necessary to support these * code points in console applications like busybox * (i.e. do these chars ever appear in filenames, hostnames, text files * and such?), we are treating these code points as invalid. * * Tertiary Ideographic Plane is also ignored for now, * until Unicode committee assigns something there. */ /* The following two functions define the column width of an ISO 10646 * character as follows: * * - The null character (U+0000) has a column width of 0. * * - Other C0/C1 control characters and DEL will lead to a return * value of -1. * * - Non-spacing and enclosing combining characters (general * category code Mn or Me in the Unicode database) have a * column width of 0. * * - SOFT HYPHEN (U+00AD) has a column width of 1. * * - Other format characters (general category code Cf in the Unicode * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. * * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) * have a column width of 0. * * - Spacing characters in the East Asian Wide (W) or East Asian * Full-width (F) category as defined in Unicode Technical * Report #11 have a column width of 2. * * - All remaining characters (including all printable * ISO 8859-1 and WGL4 characters, Unicode control characters, * etc.) have a column width of 1. * * This implementation assumes that wchar_t characters are encoded * in ISO 10646. */ int FAST_FUNC wcwidth(unsigned ucs) { # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300 /* sorted list of non-overlapping intervals of non-spacing characters */ /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ # define BIG_(a,b) { a, b }, # define PAIR(a,b) # define ARRAY /* PAIR if < 0x4000 and no more than 4 chars big */ \ BIG_(0x0300, 0x036F) \ PAIR(0x0483, 0x0486) \ PAIR(0x0488, 0x0489) \ BIG_(0x0591, 0x05BD) \ PAIR(0x05BF, 0x05BF) \ PAIR(0x05C1, 0x05C2) \ PAIR(0x05C4, 0x05C5) \ PAIR(0x05C7, 0x05C7) \ PAIR(0x0600, 0x0603) \ BIG_(0x0610, 0x0615) \ BIG_(0x064B, 0x065E) \ PAIR(0x0670, 0x0670) \ BIG_(0x06D6, 0x06E4) \ PAIR(0x06E7, 0x06E8) \ PAIR(0x06EA, 0x06ED) \ PAIR(0x070F, 0x070F) \ PAIR(0x0711, 0x0711) \ BIG_(0x0730, 0x074A) \ BIG_(0x07A6, 0x07B0) \ BIG_(0x07EB, 0x07F3) \ PAIR(0x0901, 0x0902) \ PAIR(0x093C, 0x093C) \ BIG_(0x0941, 0x0948) \ PAIR(0x094D, 0x094D) \ PAIR(0x0951, 0x0954) \ PAIR(0x0962, 0x0963) \ PAIR(0x0981, 0x0981) \ PAIR(0x09BC, 0x09BC) \ PAIR(0x09C1, 0x09C4) \ PAIR(0x09CD, 0x09CD) \ PAIR(0x09E2, 0x09E3) \ PAIR(0x0A01, 0x0A02) \ PAIR(0x0A3C, 0x0A3C) \ PAIR(0x0A41, 0x0A42) \ PAIR(0x0A47, 0x0A48) \ PAIR(0x0A4B, 0x0A4D) \ PAIR(0x0A70, 0x0A71) \ PAIR(0x0A81, 0x0A82) \ PAIR(0x0ABC, 0x0ABC) \ BIG_(0x0AC1, 0x0AC5) \ PAIR(0x0AC7, 0x0AC8) \ PAIR(0x0ACD, 0x0ACD) \ PAIR(0x0AE2, 0x0AE3) \ PAIR(0x0B01, 0x0B01) \ PAIR(0x0B3C, 0x0B3C) \ PAIR(0x0B3F, 0x0B3F) \ PAIR(0x0B41, 0x0B43) \ PAIR(0x0B4D, 0x0B4D) \ PAIR(0x0B56, 0x0B56) \ PAIR(0x0B82, 0x0B82) \ PAIR(0x0BC0, 0x0BC0) \ PAIR(0x0BCD, 0x0BCD) \ PAIR(0x0C3E, 0x0C40) \ PAIR(0x0C46, 0x0C48) \ PAIR(0x0C4A, 0x0C4D) \ PAIR(0x0C55, 0x0C56) \ PAIR(0x0CBC, 0x0CBC) \ PAIR(0x0CBF, 0x0CBF) \ PAIR(0x0CC6, 0x0CC6) \ PAIR(0x0CCC, 0x0CCD) \ PAIR(0x0CE2, 0x0CE3) \ PAIR(0x0D41, 0x0D43) \ PAIR(0x0D4D, 0x0D4D) \ PAIR(0x0DCA, 0x0DCA) \ PAIR(0x0DD2, 0x0DD4) \ PAIR(0x0DD6, 0x0DD6) \ PAIR(0x0E31, 0x0E31) \ BIG_(0x0E34, 0x0E3A) \ BIG_(0x0E47, 0x0E4E) \ PAIR(0x0EB1, 0x0EB1) \ BIG_(0x0EB4, 0x0EB9) \ PAIR(0x0EBB, 0x0EBC) \ BIG_(0x0EC8, 0x0ECD) \ PAIR(0x0F18, 0x0F19) \ PAIR(0x0F35, 0x0F35) \ PAIR(0x0F37, 0x0F37) \ PAIR(0x0F39, 0x0F39) \ BIG_(0x0F71, 0x0F7E) \ BIG_(0x0F80, 0x0F84) \ PAIR(0x0F86, 0x0F87) \ PAIR(0x0FC6, 0x0FC6) \ BIG_(0x0F90, 0x0F97) \ BIG_(0x0F99, 0x0FBC) \ PAIR(0x102D, 0x1030) \ PAIR(0x1032, 0x1032) \ PAIR(0x1036, 0x1037) \ PAIR(0x1039, 0x1039) \ PAIR(0x1058, 0x1059) \ BIG_(0x1160, 0x11FF) \ PAIR(0x135F, 0x135F) \ PAIR(0x1712, 0x1714) \ PAIR(0x1732, 0x1734) \ PAIR(0x1752, 0x1753) \ PAIR(0x1772, 0x1773) \ PAIR(0x17B4, 0x17B5) \ BIG_(0x17B7, 0x17BD) \ PAIR(0x17C6, 0x17C6) \ BIG_(0x17C9, 0x17D3) \ PAIR(0x17DD, 0x17DD) \ PAIR(0x180B, 0x180D) \ PAIR(0x18A9, 0x18A9) \ PAIR(0x1920, 0x1922) \ PAIR(0x1927, 0x1928) \ PAIR(0x1932, 0x1932) \ PAIR(0x1939, 0x193B) \ PAIR(0x1A17, 0x1A18) \ PAIR(0x1B00, 0x1B03) \ PAIR(0x1B34, 0x1B34) \ BIG_(0x1B36, 0x1B3A) \ PAIR(0x1B3C, 0x1B3C) \ PAIR(0x1B42, 0x1B42) \ BIG_(0x1B6B, 0x1B73) \ BIG_(0x1DC0, 0x1DCA) \ PAIR(0x1DFE, 0x1DFF) \ BIG_(0x200B, 0x200F) \ BIG_(0x202A, 0x202E) \ PAIR(0x2060, 0x2063) \ BIG_(0x206A, 0x206F) \ BIG_(0x20D0, 0x20EF) \ BIG_(0x302A, 0x302F) \ PAIR(0x3099, 0x309A) \ /* Too big to be packed in PAIRs: */ \ BIG_(0xA806, 0xA806) \ BIG_(0xA80B, 0xA80B) \ BIG_(0xA825, 0xA826) \ BIG_(0xFB1E, 0xFB1E) \ BIG_(0xFE00, 0xFE0F) \ BIG_(0xFE20, 0xFE23) \ BIG_(0xFEFF, 0xFEFF) \ BIG_(0xFFF9, 0xFFFB) static const struct interval combining[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) # define PAIR(a,b) (a << 2) | (b-a), static const uint16_t combining1[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1]; # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1]; struct CHECK { ARRAY }; # undef BIG_ # undef PAIR # undef ARRAY # endif if (ucs == 0) return 0; /* Test for 8-bit control characters (00-1f, 80-9f, 7f) */ if ((ucs & ~0x80) < 0x20 || ucs == 0x7f) return -1; /* Quick abort if it is an obviously invalid char */ if (ucs > CONFIG_LAST_SUPPORTED_WCHAR) return -1; /* Optimization: no combining chars below 0x300 */ if (CONFIG_LAST_SUPPORTED_WCHAR < 0x300 || ucs < 0x300) return 1; # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300 /* Binary search in table of non-spacing characters */ if (in_interval_table(ucs, combining, ARRAY_SIZE(combining) - 1)) return 0; if (in_uint16_table(ucs, combining1, ARRAY_SIZE(combining1) - 1)) return 0; /* Optimization: all chars below 0x1100 are not double-width */ if (CONFIG_LAST_SUPPORTED_WCHAR < 0x1100 || ucs < 0x1100) return 1; # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x1100 /* Invalid code points: */ /* High (d800..dbff) and low (dc00..dfff) surrogates (valid only in UTF16) */ /* Private Use Area (e000..f8ff) */ /* Noncharacters fdd0..fdef */ if ((CONFIG_LAST_SUPPORTED_WCHAR >= 0xd800 && ucs >= 0xd800 && ucs <= 0xf8ff) || (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfdd0 && ucs >= 0xfdd0 && ucs <= 0xfdef) ) { return -1; } /* 0xfffe and 0xffff in every plane are invalid */ if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfffe && ((ucs & 0xfffe) == 0xfffe)) { return -1; } # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x10000 if (ucs >= 0x10000) { /* Combining chars in Supplementary Multilingual Plane 0x1xxxx */ 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 } }; /* Binary search in table of non-spacing characters in Supplementary Multilingual Plane */ if (in_interval_table(ucs ^ 0x10000, combining0x10000, ARRAY_SIZE(combining0x10000) - 1)) return 0; /* Check a few non-spacing chars in Supplementary Special-purpose Plane 0xExxxx */ if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xE0001 && ( ucs == 0xE0001 || (ucs >= 0xE0020 && ucs <= 0xE007F) || (ucs >= 0xE0100 && ucs <= 0xE01EF) ) ) { return 0; } } # endif /* If we arrive here, ucs is not a combining or C0/C1 control character. * Check whether it's 1 char or 2-shar wide. */ return 1 + ( (/*ucs >= 0x1100 &&*/ ucs <= 0x115f) /* Hangul Jamo init. consonants */ || 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 */ # if CONFIG_LAST_SUPPORTED_WCHAR >= 0xac00 || (ucs >= 0xac00 && ucs <= 0xd7a3) /* Hangul Syllables */ || (ucs >= 0xf900 && ucs <= 0xfaff) /* CJK Compatibility Ideographs */ || (ucs >= 0xfe10 && ucs <= 0xfe19) /* Vertical forms */ || (ucs >= 0xfe30 && ucs <= 0xfe6f) /* CJK Compatibility Forms */ || (ucs >= 0xff00 && ucs <= 0xff60) /* Fullwidth Forms */ || (ucs >= 0xffe0 && ucs <= 0xffe6) || ((ucs >> 17) == (2 >> 1)) /* 20000..3ffff: Supplementary and Tertiary Ideographic Planes */ # endif ); # endif /* >= 0x1100 */ # endif /* >= 0x300 */ } # if ENABLE_UNICODE_BIDI_SUPPORT int FAST_FUNC unicode_bidi_isrtl(wint_t wc) { /* ranges taken from * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt * Bidi_Class=Left_To_Right | Bidi_Class=Arabic_Letter */ # define BIG_(a,b) { a, b }, # define PAIR(a,b) # define ARRAY \ PAIR(0x0590, 0x0590) \ PAIR(0x05BE, 0x05BE) \ PAIR(0x05C0, 0x05C0) \ PAIR(0x05C3, 0x05C3) \ PAIR(0x05C6, 0x05C6) \ BIG_(0x05C8, 0x05FF) \ PAIR(0x0604, 0x0605) \ PAIR(0x0608, 0x0608) \ PAIR(0x060B, 0x060B) \ PAIR(0x060D, 0x060D) \ BIG_(0x061B, 0x064A) \ PAIR(0x065F, 0x065F) \ PAIR(0x066D, 0x066F) \ BIG_(0x0671, 0x06D5) \ PAIR(0x06E5, 0x06E6) \ PAIR(0x06EE, 0x06EF) \ BIG_(0x06FA, 0x070E) \ PAIR(0x0710, 0x0710) \ BIG_(0x0712, 0x072F) \ BIG_(0x074B, 0x07A5) \ BIG_(0x07B1, 0x07EA) \ PAIR(0x07F4, 0x07F5) \ BIG_(0x07FA, 0x0815) \ PAIR(0x081A, 0x081A) \ PAIR(0x0824, 0x0824) \ PAIR(0x0828, 0x0828) \ BIG_(0x082E, 0x08FF) \ PAIR(0x200F, 0x200F) \ PAIR(0x202B, 0x202B) \ PAIR(0x202E, 0x202E) \ BIG_(0xFB1D, 0xFB1D) \ BIG_(0xFB1F, 0xFB28) \ BIG_(0xFB2A, 0xFD3D) \ BIG_(0xFD40, 0xFDCF) \ BIG_(0xFDC8, 0xFDCF) \ BIG_(0xFDF0, 0xFDFC) \ BIG_(0xFDFE, 0xFDFF) \ BIG_(0xFE70, 0xFEFE) /* Probably not necessary {0x10800, 0x1091E}, {0x10920, 0x10A00}, {0x10A04, 0x10A04}, {0x10A07, 0x10A0B}, {0x10A10, 0x10A37}, {0x10A3B, 0x10A3E}, {0x10A40, 0x10A7F}, {0x10B36, 0x10B38}, {0x10B40, 0x10E5F}, {0x10E7F, 0x10FFF}, {0x1E800, 0x1EFFF} */ static const struct interval rtl_b[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) # define PAIR(a,b) (a << 2) | (b-a), static const uint16_t rtl_p[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1]; # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1]; struct CHECK { ARRAY }; # undef BIG_ # undef PAIR # undef ARRAY if (in_interval_table(wc, rtl_b, ARRAY_SIZE(rtl_b) - 1)) return 1; if (in_uint16_table(wc, rtl_p, ARRAY_SIZE(rtl_p) - 1)) return 1; return 0; } # if ENABLE_UNICODE_NEUTRAL_TABLE int FAST_FUNC unicode_bidi_is_neutral_wchar(wint_t wc) { /* ranges taken from * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt * Bidi_Classes: Paragraph_Separator, Segment_Separator, * White_Space, Other_Neutral, European_Number, European_Separator, * European_Terminator, Arabic_Number, Common_Separator */ # define BIG_(a,b) { a, b }, # define PAIR(a,b) # define ARRAY \ BIG_(0x0009, 0x000D) \ BIG_(0x001C, 0x0040) \ BIG_(0x005B, 0x0060) \ PAIR(0x007B, 0x007E) \ PAIR(0x0085, 0x0085) \ BIG_(0x00A0, 0x00A9) \ PAIR(0x00AB, 0x00AC) \ BIG_(0x00AE, 0x00B4) \ PAIR(0x00B6, 0x00B9) \ BIG_(0x00BB, 0x00BF) \ PAIR(0x00D7, 0x00D7) \ PAIR(0x00F7, 0x00F7) \ PAIR(0x02B9, 0x02BA) \ BIG_(0x02C2, 0x02CF) \ BIG_(0x02D2, 0x02DF) \ BIG_(0x02E5, 0x02FF) \ PAIR(0x0374, 0x0375) \ PAIR(0x037E, 0x037E) \ PAIR(0x0384, 0x0385) \ PAIR(0x0387, 0x0387) \ PAIR(0x03F6, 0x03F6) \ PAIR(0x058A, 0x058A) \ PAIR(0x0600, 0x0603) \ PAIR(0x0606, 0x0607) \ PAIR(0x0609, 0x060A) \ PAIR(0x060C, 0x060C) \ PAIR(0x060E, 0x060F) \ BIG_(0x0660, 0x066C) \ PAIR(0x06DD, 0x06DD) \ PAIR(0x06E9, 0x06E9) \ BIG_(0x06F0, 0x06F9) \ PAIR(0x07F6, 0x07F9) \ PAIR(0x09F2, 0x09F3) \ PAIR(0x09FB, 0x09FB) \ PAIR(0x0AF1, 0x0AF1) \ BIG_(0x0BF3, 0x0BFA) \ BIG_(0x0C78, 0x0C7E) \ PAIR(0x0CF1, 0x0CF2) \ PAIR(0x0E3F, 0x0E3F) \ PAIR(0x0F3A, 0x0F3D) \ BIG_(0x1390, 0x1400) \ PAIR(0x1680, 0x1680) \ PAIR(0x169B, 0x169C) \ PAIR(0x17DB, 0x17DB) \ BIG_(0x17F0, 0x17F9) \ BIG_(0x1800, 0x180A) \ PAIR(0x180E, 0x180E) \ PAIR(0x1940, 0x1940) \ PAIR(0x1944, 0x1945) \ BIG_(0x19DE, 0x19FF) \ PAIR(0x1FBD, 0x1FBD) \ PAIR(0x1FBF, 0x1FC1) \ PAIR(0x1FCD, 0x1FCF) \ PAIR(0x1FDD, 0x1FDF) \ PAIR(0x1FED, 0x1FEF) \ PAIR(0x1FFD, 0x1FFE) \ BIG_(0x2000, 0x200A) \ BIG_(0x2010, 0x2029) \ BIG_(0x202F, 0x205F) \ PAIR(0x2070, 0x2070) \ BIG_(0x2074, 0x207E) \ BIG_(0x2080, 0x208E) \ BIG_(0x20A0, 0x20B8) \ PAIR(0x2100, 0x2101) \ PAIR(0x2103, 0x2106) \ PAIR(0x2108, 0x2109) \ PAIR(0x2114, 0x2114) \ PAIR(0x2116, 0x2118) \ BIG_(0x211E, 0x2123) \ PAIR(0x2125, 0x2125) \ PAIR(0x2127, 0x2127) \ PAIR(0x2129, 0x2129) \ PAIR(0x212E, 0x212E) \ PAIR(0x213A, 0x213B) \ BIG_(0x2140, 0x2144) \ PAIR(0x214A, 0x214D) \ BIG_(0x2150, 0x215F) \ PAIR(0x2189, 0x2189) \ BIG_(0x2190, 0x2335) \ BIG_(0x237B, 0x2394) \ BIG_(0x2396, 0x23E8) \ BIG_(0x2400, 0x2426) \ BIG_(0x2440, 0x244A) \ BIG_(0x2460, 0x249B) \ BIG_(0x24EA, 0x26AB) \ BIG_(0x26AD, 0x26CD) \ BIG_(0x26CF, 0x26E1) \ PAIR(0x26E3, 0x26E3) \ BIG_(0x26E8, 0x26FF) \ PAIR(0x2701, 0x2704) \ PAIR(0x2706, 0x2709) \ BIG_(0x270C, 0x2727) \ BIG_(0x2729, 0x274B) \ PAIR(0x274D, 0x274D) \ PAIR(0x274F, 0x2752) \ BIG_(0x2756, 0x275E) \ BIG_(0x2761, 0x2794) \ BIG_(0x2798, 0x27AF) \ BIG_(0x27B1, 0x27BE) \ BIG_(0x27C0, 0x27CA) \ PAIR(0x27CC, 0x27CC) \ BIG_(0x27D0, 0x27FF) \ BIG_(0x2900, 0x2B4C) \ BIG_(0x2B50, 0x2B59) \ BIG_(0x2CE5, 0x2CEA) \ BIG_(0x2CF9, 0x2CFF) \ BIG_(0x2E00, 0x2E99) \ BIG_(0x2E9B, 0x2EF3) \ BIG_(0x2F00, 0x2FD5) \ BIG_(0x2FF0, 0x2FFB) \ BIG_(0x3000, 0x3004) \ BIG_(0x3008, 0x3020) \ PAIR(0x3030, 0x3030) \ PAIR(0x3036, 0x3037) \ PAIR(0x303D, 0x303D) \ PAIR(0x303E, 0x303F) \ PAIR(0x309B, 0x309C) \ PAIR(0x30A0, 0x30A0) \ PAIR(0x30FB, 0x30FB) \ BIG_(0x31C0, 0x31E3) \ PAIR(0x321D, 0x321E) \ BIG_(0x3250, 0x325F) \ PAIR(0x327C, 0x327E) \ BIG_(0x32B1, 0x32BF) \ PAIR(0x32CC, 0x32CF) \ PAIR(0x3377, 0x337A) \ PAIR(0x33DE, 0x33DF) \ PAIR(0x33FF, 0x33FF) \ BIG_(0x4DC0, 0x4DFF) \ BIG_(0xA490, 0xA4C6) \ BIG_(0xA60D, 0xA60F) \ BIG_(0xA673, 0xA673) \ BIG_(0xA67E, 0xA67F) \ BIG_(0xA700, 0xA721) \ BIG_(0xA788, 0xA788) \ BIG_(0xA828, 0xA82B) \ BIG_(0xA838, 0xA839) \ BIG_(0xA874, 0xA877) \ BIG_(0xFB29, 0xFB29) \ BIG_(0xFD3E, 0xFD3F) \ BIG_(0xFDFD, 0xFDFD) \ BIG_(0xFE10, 0xFE19) \ BIG_(0xFE30, 0xFE52) \ BIG_(0xFE54, 0xFE66) \ BIG_(0xFE68, 0xFE6B) \ BIG_(0xFF01, 0xFF20) \ BIG_(0xFF3B, 0xFF40) \ BIG_(0xFF5B, 0xFF65) \ BIG_(0xFFE0, 0xFFE6) \ BIG_(0xFFE8, 0xFFEE) \ BIG_(0xFFF9, 0xFFFD) /* {0x10101, 0x10101}, {0x10140, 0x1019B}, {0x1091F, 0x1091F}, {0x10B39, 0x10B3F}, {0x10E60, 0x10E7E}, {0x1D200, 0x1D241}, {0x1D245, 0x1D245}, {0x1D300, 0x1D356}, {0x1D6DB, 0x1D6DB}, {0x1D715, 0x1D715}, {0x1D74F, 0x1D74F}, {0x1D789, 0x1D789}, {0x1D7C3, 0x1D7C3}, {0x1D7CE, 0x1D7FF}, {0x1F000, 0x1F02B}, {0x1F030, 0x1F093}, {0x1F100, 0x1F10A} */ static const struct interval neutral_b[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) # define PAIR(a,b) (a << 2) | (b-a), static const uint16_t neutral_p[] = { ARRAY }; # undef BIG_ # undef PAIR # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1]; # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1]; struct CHECK { ARRAY }; # undef BIG_ # undef PAIR # undef ARRAY if (in_interval_table(wc, neutral_b, ARRAY_SIZE(neutral_b) - 1)) return 1; if (in_uint16_table(wc, neutral_p, ARRAY_SIZE(neutral_p) - 1)) return 1; return 0; } # endif # endif /* UNICODE_BIDI_SUPPORT */ #endif /* Homegrown Unicode support */ /* The rest is mostly same for libc and for "homegrown" support */ size_t FAST_FUNC unicode_strlen(const char *string) { size_t width = mbstowcs(NULL, string, INT_MAX); if (width == (size_t)-1L) return strlen(string); return width; } size_t FAST_FUNC unicode_strwidth(const char *string) { uni_stat_t uni_stat; printable_string(&uni_stat, string); return uni_stat.unicode_width; } static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags) { char *dst; unsigned dst_len; unsigned uni_count; unsigned uni_width; if (unicode_status != UNICODE_ON) { char *d; if (flags & UNI_FLAG_PAD) { d = dst = xmalloc(width + 1); while ((int)--width >= 0) { unsigned char c = *src; if (c == '\0') { do *d++ = ' '; while ((int)--width >= 0); break; } *d++ = (c >= ' ' && c < 0x7f) ? c : '?'; src++; } *d = '\0'; } else { d = dst = xstrndup(src, width); while (*d) { unsigned char c = *d; if (c < ' ' || c >= 0x7f) *d = '?'; d++; } } if (stats) { stats->byte_count = (d - dst); stats->unicode_count = (d - dst); stats->unicode_width = (d - dst); } return dst; } dst = NULL; uni_count = uni_width = 0; dst_len = 0; while (1) { int w; wchar_t wc; #if ENABLE_UNICODE_USING_LOCALE { mbstate_t mbst = { 0 }; ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst); /* If invalid sequence is seen: -1 is returned, * src points to the invalid sequence, errno = EILSEQ. * Else number of wchars (excluding terminating L'\0') * written to dest is returned. * If len (here: 1) non-L'\0' wchars stored at dest, * src points to the next char to be converted. * If string is completely converted: src = NULL. */ if (rc == 0) /* end-of-string */ break; if (rc < 0) { /* error */ src++; goto subst; } if (!iswprint(wc)) goto subst; } #else src = mbstowc_internal(&wc, src); /* src is advanced to next mb char * wc == ERROR_WCHAR: invalid sequence is seen * else: wc is set */ if (wc == ERROR_WCHAR) /* error */ goto subst; if (wc == 0) /* end-of-string */ break; #endif if (CONFIG_LAST_SUPPORTED_WCHAR && wc > CONFIG_LAST_SUPPORTED_WCHAR) goto subst; w = wcwidth(wc); if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0) /* non-printable wchar */ || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0) || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1) ) { subst: wc = CONFIG_SUBST_WCHAR; w = 1; } width -= w; /* Note: if width == 0, we still may add more chars, * they may be zero-width or combining ones */ if ((int)width < 0) { /* can't add this wc, string would become longer than width */ width += w; break; } uni_count++; uni_width += w; dst = xrealloc(dst, dst_len + MB_CUR_MAX); #if ENABLE_UNICODE_USING_LOCALE { mbstate_t mbst = { 0 }; dst_len += wcrtomb(&dst[dst_len], wc, &mbst); } #else dst_len += wcrtomb_internal(&dst[dst_len], wc); #endif } /* Pad to remaining width */ if (flags & UNI_FLAG_PAD) { dst = xrealloc(dst, dst_len + width + 1); uni_count += width; uni_width += width; while ((int)--width >= 0) { dst[dst_len++] = ' '; } } dst[dst_len] = '\0'; if (stats) { stats->byte_count = dst_len; stats->unicode_count = uni_count; stats->unicode_width = uni_width; } return dst; } char* FAST_FUNC unicode_conv_to_printable(uni_stat_t *stats, const char *src) { return unicode_conv_to_printable2(stats, src, INT_MAX, 0); } char* FAST_FUNC unicode_conv_to_printable_fixedwidth(/*uni_stat_t *stats,*/ const char *src, unsigned width) { return unicode_conv_to_printable2(/*stats:*/ NULL, src, width, UNI_FLAG_PAD); } #ifdef UNUSED char* FAST_FUNC unicode_conv_to_printable_maxwidth(uni_stat_t *stats, const char *src, unsigned maxwidth) { return unicode_conv_to_printable2(stats, src, maxwidth, 0); } unsigned FAST_FUNC unicode_padding_to_width(unsigned width, const char *src) { if (unicode_status != UNICODE_ON) { return width - strnlen(src, width); } while (1) { int w; wchar_t wc; #if ENABLE_UNICODE_USING_LOCALE { mbstate_t mbst = { 0 }; ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst); if (rc <= 0) /* error, or end-of-string */ return width; } #else src = mbstowc_internal(&wc, src); if (wc == ERROR_WCHAR || wc == 0) /* error, or end-of-string */ return width; #endif w = wcwidth(wc); if (w < 0) /* non-printable wchar */ return width; width -= w; if ((int)width <= 0) /* string is longer than width */ return 0; } } #endif