sal/textenc/convertsinglebytetobmpunicode.hxx

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  19
  20 #ifndef INCLUDED_SAL_TEXTENC_CONVERTSINGLEBYTETOBMPUNICODE_HXX
  21 #define INCLUDED_SAL_TEXTENC_CONVERTSINGLEBYTETOBMPUNICODE_HXX
  22
  23 #include "sal/config.h"
  24
  25 #include <cstddef>
  26
  27 #include "sal/types.h"
  28
  29
  30 /// @HTML
  31
  32 namespace rtl { namespace textenc {
  33
  34 /**
  35    Maps a range of BMP Unicode code points to individual bytes.
  36
  37    @see rtl::textenc::BmpUnicodeToSingleByteConverterData
  38  */
  39 struct BmpUnicodeToSingleByteRange {
  40     /**
  41        The start of the range of BMP Unicode code points.
  42      */
  43     sal_Unicode unicode;
  44
  45     /**
  46        The extend of the range of BMP Unicode code points.
  47
  48        <p>The range covers <code>unicode</code> to <code>unicode + range</code>,
  49        inclusive.  It is an error if <code>unicode + range</code> is greater
  50        than <code>0xFFFF</code>.</p>
  51      */
  52     sal_uInt8 range;
  53
  54     /**
  55        The start of the corresponding range of individual bytes.
  56
  57        <p>It is an error if <code>byte + range</code> is greater than
  58        <code>0xFF</code>.</p>
  59      */
  60     sal_uInt8 byte;
  61 };
  62
  63 /**
  64    Data to convert between BMP Unicode and a single-byte character set.
  65
  66    <p>Only supports conversions where each legal unit from the single-byte
  67    character set has one or more mappings to individual BMP Unicode code points
  68    that are neither noncharacters nor surrogates.</p>
  69
  70    @see rtl_textenc_convertSingleByteToBmpUnicode
  71    @see rtl_textenc_convertBmpUnicodeToSingleByte
  72  */
  73 struct BmpUnicodeToSingleByteConverterData {
  74     /**
  75        Mapping from the single-byte character set to BMP Unicode code points.
  76
  77        <p>Illegal units from the single-byte character set are mapped to
  78        <code>0xFFFF</code>.</p>
  79      */
  80     sal_Unicode byteToUnicode[256];
  81
  82     /**
  83        The number of Unicode-to-byte conversion ranges.
  84      */
  85     std::size_t unicodeToByteEntries;
  86
  87     /**
  88        The array of Unicode-to-byte conversion ranges, sorted by increasing
  89        <code>unicode</code> values.
  90
  91        <p>The ranges may not overlap.</p>
  92      */
  93     BmpUnicodeToSingleByteRange const * unicodeToByte;
  94 };
  95
  96 } }
  97
  98 /**
  99    Function to convert from a single-byte character set to BMP Unicode.
 100
 101    @see ImplConvertToUnicodeProc
 102  */
 103 sal_Size rtl_textenc_convertSingleByteToBmpUnicode(
 104     void const * data, void * context, sal_Char const * srcBuf,
 105     sal_Size srcBytes, sal_Unicode * destBuf, sal_Size destChars,
 106     sal_uInt32 flags, sal_uInt32 * info, sal_Size * srcCvtBytes);
 107
 108 /**
 109    Function to convert from BMP Unicode to a single-byte character set.
 110
 111    @see ImplConvertToTextProc
 112  */
 113 sal_Size rtl_textenc_convertBmpUnicodeToSingleByte(
 114     void const * data, void * context,
 115     sal_Unicode const * srcBuf, sal_Size srcChars, sal_Char * destBuf,
 116     sal_Size destBytes, sal_uInt32 flags, sal_uInt32 * info,
 117     sal_Size * srcCvtChars);
 118
 119 #endif
 120
 121 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */