icuSources/common/bytesinkutil.h

   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 Edits;
  17
  18 class U_COMMON_API ByteSinkUtil {
  19 public:
  20     ByteSinkUtil() = delete;  // all static
  21
  22     /** (length) bytes were mapped to valid (s16, s16Length). */
  23     static UBool appendChange(int32_t length,
  24                               const char16_t *s16, int32_t s16Length,
  25                               ByteSink &sink, Edits *edits, UErrorCode &errorCode);
  26
  27     /** The bytes at [s, limit[ were mapped to valid (s16, s16Length). */
  28     static UBool appendChange(const uint8_t *s, const uint8_t *limit,
  29                               const char16_t *s16, int32_t s16Length,
  30                               ByteSink &sink, Edits *edits, UErrorCode &errorCode);
  31
  32     /** (length) bytes were mapped/changed to valid code point c. */
  33     static void appendCodePoint(int32_t length, UChar32 c, ByteSink &sink, Edits *edits = nullptr);
  34
  35     /** The few bytes at [src, nextSrc[ were mapped/changed to valid code point c. */
  36     static inline void appendCodePoint(const uint8_t *src, const uint8_t *nextSrc, UChar32 c,
  37                                        ByteSink &sink, Edits *edits = nullptr) {
  38         appendCodePoint((int32_t)(nextSrc - src), c, sink, edits);
  39     }
  40
  41     /** Append the two-byte character (U+0080..U+07FF). */
  42     static void appendTwoBytes(UChar32 c, ByteSink &sink);
  43
  44     static UBool appendUnchanged(const uint8_t *s, int32_t length,
  45                                  ByteSink &sink, uint32_t options, Edits *edits,
  46                                  UErrorCode &errorCode) {
  47         if (U_FAILURE(errorCode)) { return FALSE; }
  48         if (length > 0) { appendNonEmptyUnchanged(s, length, sink, options, edits); }
  49         return TRUE;
  50     }
  51
  52     static UBool appendUnchanged(const uint8_t *s, const uint8_t *limit,
  53                                  ByteSink &sink, uint32_t options, Edits *edits,
  54                                  UErrorCode &errorCode);
  55
  56 private:
  57     static void appendNonEmptyUnchanged(const uint8_t *s, int32_t length,
  58                                         ByteSink &sink, uint32_t options, Edits *edits);
  59 };
  60
  61 U_NAMESPACE_END