diff options
Diffstat (limited to 'Build/source/libs/icu/icu-src/source/common/utf_impl.cpp')
-rw-r--r-- | Build/source/libs/icu/icu-src/source/common/utf_impl.cpp | 87 |
1 files changed, 42 insertions, 45 deletions
diff --git a/Build/source/libs/icu/icu-src/source/common/utf_impl.cpp b/Build/source/libs/icu/icu-src/source/common/utf_impl.cpp index f78c566e098..9dd241a12bf 100644 --- a/Build/source/libs/icu/icu-src/source/common/utf_impl.cpp +++ b/Build/source/libs/icu/icu-src/source/common/utf_impl.cpp @@ -238,33 +238,45 @@ utf8_prevCharSafeBody(const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, U int32_t i=*pi; if(U8_IS_TRAIL(c) && i>start) { uint8_t b1=s[--i]; - if(0xc2<=b1 && b1<0xe0) { - *pi=i; - return ((b1-0xc0)<<6)|(c&0x3f); + if(U8_IS_LEAD(b1)) { + if(b1<0xe0) { + *pi=i; + return ((b1-0xc0)<<6)|(c&0x3f); + } else if(b1<0xf0 ? U8_IS_VALID_LEAD3_AND_T1(b1, c) : U8_IS_VALID_LEAD4_AND_T1(b1, c)) { + // Truncated 3- or 4-byte sequence. + *pi=i; + return errorValue(1, strict); + } } else if(U8_IS_TRAIL(b1) && i>start) { // Extract the value bits from the last trail byte. c&=0x3f; uint8_t b2=s[--i]; - if(0xe0<=b2 && b2<0xf0) { - b2&=0xf; - if(strict!=-2) { - if(U8_IS_VALID_LEAD3_AND_T1(b2, b1)) { - *pi=i; - c=(b2<<12)|((b1&0x3f)<<6)|c; - if(strict<=0 || !U_IS_UNICODE_NONCHAR(c)) { - return c; - } else { - // strict: forbid non-characters like U+fffe - return errorValue(2, strict); + if(0xe0<=b2 && b2<=0xf4) { + if(b2<0xf0) { + b2&=0xf; + if(strict!=-2) { + if(U8_IS_VALID_LEAD3_AND_T1(b2, b1)) { + *pi=i; + c=(b2<<12)|((b1&0x3f)<<6)|c; + if(strict<=0 || !U_IS_UNICODE_NONCHAR(c)) { + return c; + } else { + // strict: forbid non-characters like U+fffe + return errorValue(2, strict); + } + } + } else { + // strict=-2 -> lenient: allow surrogates + b1-=0x80; + if((b2>0 || b1>=0x20)) { + *pi=i; + return (b2<<12)|(b1<<6)|c; } } - } else { - // strict=-2 -> lenient: allow surrogates - b1-=0x80; - if((b2>0 || b1>=0x20)) { - *pi=i; - return (b2<<12)|(b1<<6)|c; - } + } else if(U8_IS_VALID_LEAD4_AND_T1(b2, b1)) { + // Truncated 4-byte sequence. + *pi=i; + return errorValue(2, strict); } } else if(U8_IS_TRAIL(b2) && i>start) { uint8_t b3=s[--i]; @@ -281,16 +293,7 @@ utf8_prevCharSafeBody(const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, U } } } - } else if(0xf0<=b2 && b2<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(b2, b1)) { - // Truncated 4-byte sequence. - *pi=i; - return errorValue(2, strict); } - } else if((0xe0<=b1 && b1<0xf0 && U8_IS_VALID_LEAD3_AND_T1(b1, c)) || - (0xf0<=b1 && b1<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(b1, c))) { - // Truncated 3- or 4-byte sequence. - *pi=i; - return errorValue(1, strict); } } return errorValue(0, strict); @@ -303,29 +306,23 @@ utf8_back1SafeBody(const uint8_t *s, int32_t start, int32_t i) { uint8_t c=s[i]; if(U8_IS_TRAIL(c) && i>start) { uint8_t b1=s[--i]; - if(0xc2<=b1 && b1<0xe0) { - return i; + if(U8_IS_LEAD(b1)) { + if(b1<0xe0 || + (b1<0xf0 ? U8_IS_VALID_LEAD3_AND_T1(b1, c) : U8_IS_VALID_LEAD4_AND_T1(b1, c))) { + return i; + } } else if(U8_IS_TRAIL(b1) && i>start) { uint8_t b2=s[--i]; - if(0xe0<=b2 && b2<0xf0) { - if(U8_IS_VALID_LEAD3_AND_T1(b2, b1)) { + if(0xe0<=b2 && b2<=0xf4) { + if(b2<0xf0 ? U8_IS_VALID_LEAD3_AND_T1(b2, b1) : U8_IS_VALID_LEAD4_AND_T1(b2, b1)) { return i; } } else if(U8_IS_TRAIL(b2) && i>start) { uint8_t b3=s[--i]; - if(0xf0<=b3 && b3<=0xf4) { - if(U8_IS_VALID_LEAD4_AND_T1(b3, b2)) { - return i; - } + if(0xf0<=b3 && b3<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(b3, b2)) { + return i; } - } else if(0xf0<=b2 && b2<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(b2, b1)) { - // Truncated 4-byte sequence. - return i; } - } else if((0xe0<=b1 && b1<0xf0 && U8_IS_VALID_LEAD3_AND_T1(b1, c)) || - (0xf0<=b1 && b1<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(b1, c))) { - // Truncated 3- or 4-byte sequence. - return i; } } return orig_i; |