#include "libbb.h"
#include "unicode.h"
-/* If it's not a constant... */
+/* If it's not #defined as a constant in unicode.h... */
#ifndef unicode_status
uint8_t unicode_status;
#endif
-size_t FAST_FUNC bb_mbstrlen(const char *string)
-{
- size_t width = mbstowcs(NULL, string, INT_MAX);
- if (width == (size_t)-1L)
- return strlen(string);
- return width;
-}
+/* This file is compiled only if FEATURE_ASSUME_UNICODE is on.
+ * We check other options and decide whether to use libc support
+ * via locale, or use our own logic:
+ */
#if ENABLE_LOCALE_SUPPORT
-/* Unicode support using libc */
+/* Unicode support using libc locale support. */
void FAST_FUNC init_unicode(void)
{
if (unicode_status != UNICODE_UNKNOWN)
return;
- unicode_status = bb_mbstrlen(unicode_0x394) == 1 ? UNICODE_ON : UNICODE_OFF;
+ unicode_status = unicode_strlen(unicode_0x394) == 1 ? UNICODE_ON : UNICODE_OFF;
}
#else
-/* Crude "locale support" which knows only C and Unicode locales */
+/* Homegrown Unicode support. It knows only C and Unicode locales. */
# if ENABLE_FEATURE_CHECK_UNICODE_IN_ENV
void FAST_FUNC init_unicode(void)
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) {
return wcrtomb_internal(s, wc);
}
-
size_t FAST_FUNC wcstombs(char *dest, const wchar_t *src, size_t n)
{
size_t org_n = n;
return org_n - n;
}
+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)
+ return NULL;
+ c = (uint8_t)(c) >> bytes;
+
+ while (--bytes) {
+ unsigned ch = (unsigned char) *src++;
+ if ((ch & 0xc0) != 0x80) {
+ return NULL;
+ }
+ c = (c << 6) + (ch & 0x3f);
+ }
+
+ /* 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 */
+ return NULL;
+ //or maybe 0xfffd; /* replacement character */
+ }
+
+ *res = c;
+ return src;
+}
size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n)
{
size_t org_n = n;
}
while (n) {
- int bytes;
- unsigned c = (unsigned char) *src++;
-
- if (c <= 0x7f) {
- if (dest)
- *dest++ = c;
- if (c == '\0')
- break;
- n--;
- continue;
- }
-
- /* 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)
+ wchar_t wc;
+ const char *rc = mbstowc_internal(dest ? dest : &wc, src);
+ if (rc == NULL) /* error */
return (size_t) -1L;
- c = (uint8_t)(c) >> bytes;
-
- while (--bytes) {
- unsigned ch = (unsigned char) *src++;
- if ((ch & 0xc0) != 0x80) {
- return (size_t) -1L;
- }
- c = (c << 6) + (ch & 0x3f);
- }
-
- /* 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 */
- return (size_t) -1L;
- //or maybe: c = 0xfffd; /* replacement character */
- }
-
if (dest)
- *dest++ = c;
+ dest++;
n--;
}
return org_n - n;
}
+#include "unicode_wcwidth.c"
+
int FAST_FUNC iswspace(wint_t wc)
{
return (unsigned)wc <= 0x7f && isspace(wc);
return (unsigned)wc <= 0x7f && ispunct(wc);
}
+#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;
+}
+
+char* FAST_FUNC unicode_cut_nchars(unsigned width, const char *src)
+{
+ char *dst;
+ unsigned dst_len;
+
+ if (unicode_status != UNICODE_ON)
+ return xasprintf("%-*.*s", width, width, src);
+
+ dst = NULL;
+ dst_len = 0;
+ while (1) {
+ int w;
+ wchar_t wc;
+
+ dst = xrealloc(dst, dst_len + 2 * MB_CUR_MAX);
+#if ENABLE_LOCALE_SUPPORT
+ {
+ mbstate_t mbst = { 0 };
+ ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
+ if (rc <= 0) /* error, or end-of-string */
+ break;
+ }
+#else
+ src = mbstowc_internal(&wc, src);
+ if (!src || wc == 0) /* error, or end-of-string */
+ break;
#endif
+ w = wcwidth(wc);
+ if (w < 0) /* non-printable wchar */
+ break;
+ width -= w;
+ if ((int)width < 0) { /* string is longer than width */
+ width += w;
+ while (width) {
+ dst[dst_len++] = ' ';
+ width--;
+ }
+ break;
+ }
+#if ENABLE_LOCALE_SUPPORT
+ {
+ mbstate_t mbst = { 0 };
+ dst_len += wcrtomb(&dst[dst_len], wc, &mbst);
+ }
+#else
+ dst_len += wcrtomb_internal(&dst[dst_len], wc);
+#endif
+ }
+ dst[dst_len] = '\0';
+ return dst;
+}
+
+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_LOCALE_SUPPORT
+ {
+ 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 (!src || 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;
+ }
+}
--- /dev/null
+/*
+ * 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
+ */
+
+struct interval {
+ uint16_t first;
+ uint16_t last;
+};
+
+/* auxiliary function for binary search in interval table */
+static int in_table(unsigned ucs, const struct interval *table, unsigned max)
+{
+ unsigned min = 0;
+ unsigned mid;
+
+ if (ucs < table[0].first || ucs > table[max].last)
+ return 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;
+}
+
+
+/* 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.
+ */
+static int wcwidth(unsigned ucs)
+{
+ /* 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[] = {
+ { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 },
+ { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
+ { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 },
+ { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 },
+ { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
+ { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
+ { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 },
+ { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D },
+ { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 },
+ { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD },
+ { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C },
+ { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D },
+ { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC },
+ { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD },
+ { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C },
+ { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D },
+ { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 },
+ { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 },
+ { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC },
+ { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
+ { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D },
+ { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 },
+ { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E },
+ { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC },
+ { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 },
+ { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E },
+ { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 },
+ { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 },
+ { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 },
+ { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F },
+ { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 },
+ { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD },
+ { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD },
+ { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 },
+ { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B },
+ { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 },
+ { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 },
+ { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF },
+ { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 },
+ { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F },
+ { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B },
+ { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F },
+ { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB }
+ };
+ 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 }
+ };
+
+ if (ucs == 0)
+ return 0;
+ /* test for 8-bit control characters (00-1f, 80-9f, 7f) */
+ if ((ucs & ~0x80) < 0x20 || ucs == 0x7f)
+ return -1;
+ if (ucs < 0x0300) /* optimization */
+ return 1;
+
+ /* binary search in table of non-spacing characters */
+ if (in_table(ucs, combining, ARRAY_SIZE(combining) - 1))
+ return 0;
+
+ if (ucs < 0x1100) /* optimization */
+ return 1;
+
+ /* binary search in table of non-spacing characters, cont. */
+ if (in_table(ucs ^ 0x10000, combining0x10000, ARRAY_SIZE(combining0x10000) - 1))
+ return 0;
+ if (ucs == 0xE0001
+ || (ucs >= 0xE0020 && ucs <= 0xE007F)
+ || (ucs >= 0xE0100 && ucs <= 0xE01EF)
+ ) {
+ return 0;
+ }
+
+ /* if we arrive here, ucs is not a combining or C0/C1 control character */
+
+ return 1 +
+ ( (/*ucs >= 0x1100 &&*/ ucs <= 0x115f) /* Hangul Jamo init. consonants */
+ || ucs == 0x2329
+ || ucs == 0x232a
+ || (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) /* CJK ... Yi */
+ || (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 >= 0x20000 && ucs <= 0x2fffd)
+ || (ucs >= 0x30000 && ucs <= 0x3fffd)
+ );
+}
projects / oweals / busybox.git / commitdiff