1 // © 2017 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 4 // bytesinkutil.h 5 // created: 2017sep14 Markus W. Scherer 6 7 #include "unicode/utypes.h" 8 #include "unicode/bytestream.h" 9 #include "unicode/edits.h" 10 #include "cmemory.h" 11 #include "uassert.h" 12 13 U_NAMESPACE_BEGIN 14 15 class ByteSink; 16 class CharString; 17 class Edits; 18 19 class U_COMMON_API ByteSinkUtil { 20 public: 21 ByteSinkUtil() = delete; // all static 22 23 /** (length) bytes were mapped to valid (s16, s16Length). */ 24 static UBool appendChange(int32_t length, 25 const char16_t *s16, int32_t s16Length, 26 ByteSink &sink, Edits *edits, UErrorCode &errorCode); 27 28 /** The bytes at [s, limit[ were mapped to valid (s16, s16Length). */ 29 static UBool appendChange(const uint8_t *s, const uint8_t *limit, 30 const char16_t *s16, int32_t s16Length, 31 ByteSink &sink, Edits *edits, UErrorCode &errorCode); 32 33 /** (length) bytes were mapped/changed to valid code point c. */ 34 static void appendCodePoint(int32_t length, UChar32 c, ByteSink &sink, Edits *edits = nullptr); 35 36 /** The few bytes at [src, nextSrc[ were mapped/changed to valid code point c. */ 37 static inline void appendCodePoint(const uint8_t *src, const uint8_t *nextSrc, UChar32 c, 38 ByteSink &sink, Edits *edits = nullptr) { 39 appendCodePoint((int32_t)(nextSrc - src), c, sink, edits); 40 } 41 42 /** Append the two-byte character (U+0080..U+07FF). */ 43 static void appendTwoBytes(UChar32 c, ByteSink &sink); 44 appendUnchanged(const uint8_t * s,int32_t length,ByteSink & sink,uint32_t options,Edits * edits,UErrorCode & errorCode)45 static UBool appendUnchanged(const uint8_t *s, int32_t length, 46 ByteSink &sink, uint32_t options, Edits *edits, 47 UErrorCode &errorCode) { 48 if (U_FAILURE(errorCode)) { return false; } 49 if (length > 0) { appendNonEmptyUnchanged(s, length, sink, options, edits); } 50 return true; 51 } 52 53 static UBool appendUnchanged(const uint8_t *s, const uint8_t *limit, 54 ByteSink &sink, uint32_t options, Edits *edits, 55 UErrorCode &errorCode); 56 57 private: 58 static void appendNonEmptyUnchanged(const uint8_t *s, int32_t length, 59 ByteSink &sink, uint32_t options, Edits *edits); 60 }; 61 62 class U_COMMON_API CharStringByteSink : public ByteSink { 63 public: 64 CharStringByteSink(CharString* dest); 65 ~CharStringByteSink() override; 66 67 CharStringByteSink() = delete; 68 CharStringByteSink(const CharStringByteSink&) = delete; 69 CharStringByteSink& operator=(const CharStringByteSink&) = delete; 70 71 void Append(const char* bytes, int32_t n) override; 72 73 char* GetAppendBuffer(int32_t min_capacity, 74 int32_t desired_capacity_hint, 75 char* scratch, 76 int32_t scratch_capacity, 77 int32_t* result_capacity) override; 78 79 private: 80 CharString& dest_; 81 }; 82 83 U_NAMESPACE_END 84