emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
aae428f0bf
busybox/libbb/unicode.c
Denys Vlasenko 28d91d754e libbb: fix potential NULL pointer use 
function                                             old     new   delta
unicode_conv_to_printable2                           193     216     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-03 10:36:51 +02:00

1181 lines
32 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* 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++] = ' ';
}
}
if (!dst) /* for example, if input was "" */
dst = xzalloc(1);
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
Reference in New Issue View Git Blame Copy Permalink