| /* vi: set sw=4 ts=4: */ |
| /* |
| * Unicode support routines. |
| * |
| * Copyright (C) 2009 Denys Vlasenko |
| * |
| * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
| */ |
| #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 init_unicode(void) |
| { |
| static const char unicode_0x394[] = { 0xce, 0x94, 0 }; |
| size_t width; |
| |
| if (unicode_status != UNICODE_UNKNOWN) |
| return; |
| /* In unicode, this is a one character string */ |
| // can use unicode_strlen(string) too, but otherwise unicode_strlen() is unused |
| width = mbstowcs(NULL, unicode_0x394, INT_MAX); |
| unicode_status = (width == 1 ? UNICODE_ON : UNICODE_OFF); |
| } |
| |
| #else |
| |
| /* Homegrown Unicode support. It knows only C and Unicode locales. */ |
| |
| # if ENABLE_FEATURE_CHECK_UNICODE_IN_ENV |
| void FAST_FUNC init_unicode(void) |
| { |
| char *lang; |
| |
| if (unicode_status != UNICODE_UNKNOWN) |
| return; |
| |
| unicode_status = UNICODE_OFF; |
| lang = getenv("LANG"); |
| if (!lang || !(strstr(lang, ".utf") || strstr(lang, ".UTF"))) |
| return; |
| unicode_status = UNICODE_ON; |
| } |
| # 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 */ |
| |
| #if 0 // UNUSED |
| 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; |
| } |
| #endif |
| |
| 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 = stats->unicode_count = (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_maxwidth(uni_stat_t *stats, const char *src, unsigned maxwidth) |
| { |
| return unicode_conv_to_printable2(stats, src, maxwidth, 0); |
| } |
| char* FAST_FUNC unicode_conv_to_printable_fixedwidth(uni_stat_t *stats, const char *src, unsigned width) |
| { |
| return unicode_conv_to_printable2(stats, src, width, UNI_FLAG_PAD); |
| } |
| |
| #ifdef UNUSED |
| 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 |