diff options
author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-07-12 00:26:48 +0400 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-07-12 00:26:48 +0400 |
commit | fda8f57360aaf24dba3784aae4818f5a351f5c7d (patch) | |
tree | b8de1ad1663efc5270ae2e5e1067d84a1530474f /libbb/unicode.c | |
parent | 42a8fd0db08ab8b45fec6eab4af841f99576b260 (diff) |
tweaking Unicode support
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/unicode.c')
-rw-r--r-- | libbb/unicode.c | 107 |
1 files changed, 47 insertions, 60 deletions
diff --git a/libbb/unicode.c b/libbb/unicode.c index a99f5ede1..b977437ef 100644 --- a/libbb/unicode.c +++ b/libbb/unicode.c @@ -7,13 +7,22 @@ * Licensed under GPL version 2, see file LICENSE in this tarball for details. */ #include "libbb.h" +# include "unicode.h" -/* if LOCALE_SUPPORT, libc locale stuff takes care of it, else: */ +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; +} #if !ENABLE_LOCALE_SUPPORT -#include "unicode.h" -/* 0: not known yet, +/* Crude "locale support" which knows only C and Unicode locales */ + +/* unicode_is_enabled: + * 0: not known yet, * 1: not unicode (IOW: assuming one char == one byte) * 2: unicode */ @@ -39,6 +48,7 @@ void FAST_FUNC check_unicode_in_env(void) static size_t wcrtomb_internal(char *s, wchar_t wc) { + int n; uint32_t v = wc; if (v <= 0x7f) { @@ -46,65 +56,38 @@ static size_t wcrtomb_internal(char *s, wchar_t wc) return 1; } - /* 80-7FF -> 110yyyxx 10xxxxxx */ - if (v <= 0x7ff) { - s[1] = (v & 0x3f) | 0x80; - v >>= 6; - s[0] = v | 0xc0; - return 2; - } + /* RFC 3629 says that Unicode ends at 10FFFF, + * but we cover entire 32 bits */ - /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */ - if (v <= 0xffff) { - s[2] = (v & 0x3f) | 0x80; - v >>= 6; - s[1] = (v & 0x3f) | 0x80; - v >>= 6; - s[0] = v | 0xe0; - return 3; + n = 2; + /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ + if (v >= 0x4000000) { + s[5] = (wc & 0x3f) | 0x80; + wc = (uint32_t)wc >> 6; /* ensuring that high bits are 0 */ + n++; + } + /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ + if (v >= 0x200000) { + s[4] = (wc & 0x3f) | 0x80; + wc >>= 6; + n++; } - - /* RFC 3629 says that Unicode ends at 10FFFF */ - /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */ - if (v <= 0x1fffff) { - s[3] = (v & 0x3f) | 0x80; - v >>= 6; - s[2] = (v & 0x3f) | 0x80; - v >>= 6; - s[1] = (v & 0x3f) | 0x80; - v >>= 6; - s[0] = v | 0xf0; - return 4; + if (v >= 0x10000) { + s[3] = (wc & 0x3f) | 0x80; + wc >>= 6; + n++; } - - /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ - if (v <= 0x3ffffff) { - s[4] = (v & 0x3f) | 0x80; - v >>= 6; - s[3] = (v & 0x3f) | 0x80; - v >>= 6; - s[2] = (v & 0x3f) | 0x80; - v >>= 6; - s[1] = (v & 0x3f) | 0x80; - v >>= 6; - s[0] = v | 0xf8; - return 5; + /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */ + if (v >= 0x800) { + s[2] = (wc & 0x3f) | 0x80; + wc >>= 6; + n++; } - - /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */ - s[5] = (v & 0x3f) | 0x80; - v >>= 6; - s[4] = (v & 0x3f) | 0x80; - v >>= 6; - s[3] = (v & 0x3f) | 0x80; - v >>= 6; - s[2] = (v & 0x3f) | 0x80; - v >>= 6; - s[1] = (v & 0x3f) | 0x80; - v >>= 6; - s[0] = v | 0xfc; - return 6; + s[1] = (wc & 0x3f) | 0x80; + wc >>= 6; + s[0] = wc | (uint8_t)(0x3f00 >> n); + return n; } size_t FAST_FUNC wcrtomb(char *s, wchar_t wc, mbstate_t *ps UNUSED_PARAM) @@ -164,7 +147,9 @@ size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n) if (unicode_is_enabled != 2) { while (n) { unsigned char c = *src++; - *dest++ = c; + + if (dest) + *dest++ = c; if (c == 0) break; n--; @@ -177,7 +162,8 @@ size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n) unsigned c = (unsigned char) *src++; if (c <= 0x7f) { - *dest++ = c; + if (dest) + *dest++ = c; if (c == '\0') break; n--; @@ -216,7 +202,8 @@ size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n) //or maybe: c = 0xfffd; /* replacement character */ } - *dest++ = c; + if (dest) + *dest++ = c; n--; } |