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 #ifndef BYTESINKUTIL_H 8 #define BYTESINKUTIL_H 9 10 #include "unicode/utypes.h" 11 #include "unicode/bytestream.h" 12 #include "unicode/edits.h" 13 #include "cmemory.h" 14 #include "uassert.h" 15 16 U_NAMESPACE_BEGIN 17 18 class ByteSink; 19 class CharString; 20 class Edits; 21 22 class U_COMMON_API ByteSinkUtil { 23 public: 24 ByteSinkUtil() = delete; // all static 25 26 /** (length) bytes were mapped to valid (s16, s16Length). */ 27 static UBool appendChange(int32_t length, 28 const char16_t *s16, int32_t s16Length, 29 ByteSink &sink, Edits *edits, UErrorCode &errorCode); 30 31 /** The bytes at [s, limit[ were mapped to valid (s16, s16Length). */ 32 static UBool appendChange(const uint8_t *s, const uint8_t *limit, 33 const char16_t *s16, int32_t s16Length, 34 ByteSink &sink, Edits *edits, UErrorCode &errorCode); 35 36 /** (length) bytes were mapped/changed to valid code point c. */ 37 static void appendCodePoint(int32_t length, UChar32 c, ByteSink &sink, Edits *edits = nullptr); 38 39 /** The few bytes at [src, nextSrc[ were mapped/changed to valid code point c. */ 40 static inline void appendCodePoint(const uint8_t *src, const uint8_t *nextSrc, UChar32 c, 41 ByteSink &sink, Edits *edits = nullptr) { 42 appendCodePoint((int32_t)(nextSrc - src), c, sink, edits); 43 } 44 45 /** Append the two-byte character (U+0080..U+07FF). */ 46 static void appendTwoBytes(UChar32 c, ByteSink &sink); 47 appendUnchanged(const uint8_t * s,int32_t length,ByteSink & sink,uint32_t options,Edits * edits,UErrorCode & errorCode)48 static UBool appendUnchanged(const uint8_t *s, int32_t length, 49 ByteSink &sink, uint32_t options, Edits *edits, 50 UErrorCode &errorCode) { 51 if (U_FAILURE(errorCode)) { return false; } 52 if (length > 0) { appendNonEmptyUnchanged(s, length, sink, options, edits); } 53 return true; 54 } 55 56 static UBool appendUnchanged(const uint8_t *s, const uint8_t *limit, 57 ByteSink &sink, uint32_t options, Edits *edits, 58 UErrorCode &errorCode); 59 60 private: 61 static void appendNonEmptyUnchanged(const uint8_t *s, int32_t length, 62 ByteSink &sink, uint32_t options, Edits *edits); 63 }; 64 65 class U_COMMON_API CharStringByteSink : public ByteSink { 66 public: 67 CharStringByteSink(CharString* dest); 68 ~CharStringByteSink() override; 69 70 CharStringByteSink() = delete; 71 CharStringByteSink(const CharStringByteSink&) = delete; 72 CharStringByteSink& operator=(const CharStringByteSink&) = delete; 73 74 void Append(const char* bytes, int32_t n) override; 75 76 char* GetAppendBuffer(int32_t min_capacity, 77 int32_t desired_capacity_hint, 78 char* scratch, 79 int32_t scratch_capacity, 80 int32_t* result_capacity) override; 81 82 private: 83 CharString& dest_; 84 }; 85 86 U_NAMESPACE_END 87 88 #endif //BYTESINKUTIL_H 89