vcl/generic/print/psputil.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <string.h>
  21 #include <rtl/instance.hxx>
  22 #include "psputil.hxx"
  23
  24 namespace psp {
  25
  26 /*
  27  * string convenience routines
  28  */
  29
  30 sal_Int32
  31 getHexValueOf (sal_Int32 nValue, sal_Char* pBuffer)
  32 {
  33     const static sal_Char pHex [0x10] = {
  34         '0', '1', '2', '3', '4', '5', '6', '7',
  35         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
  36
  37     pBuffer[0] = pHex [(nValue & 0xF0) >> 4];
  38     pBuffer[1] = pHex [(nValue & 0x0F)     ];
  39
  40     return 2;
  41 }
  42
  43 sal_Int32
  44 getAlignedHexValueOf (sal_Int32 nValue, sal_Char* pBuffer)
  45 {
  46     // get sign
  47     bool bNegative = nValue < 0;
  48     nValue = bNegative ? -nValue : nValue;
  49
  50     // get required buffer size, must be a multiple of two
  51     sal_Int32 nPrecision;
  52     if (nValue < 0x80)
  53         nPrecision = 2;
  54     else
  55         if (nValue < 0x8000)
  56             nPrecision = 4;
  57         else
  58             if (nValue < 0x800000)
  59                 nPrecision = 6;
  60             else
  61                 nPrecision = 8;
  62
  63     // convert the int into its hex representation, write it into the buffer
  64     sal_Int32 nRet = nPrecision;
  65     while (nPrecision)
  66     {
  67         nPrecision -= getHexValueOf (nValue % 256, pBuffer + nPrecision - 2 );
  68         nValue /= 256;
  69     }
  70
  71     // set sign bit
  72     if (bNegative)
  73     {
  74         switch (pBuffer[0])
  75         {
  76             case '0' : pBuffer[0] = '8'; break;
  77             case '1' : pBuffer[0] = '9'; break;
  78             case '2' : pBuffer[0] = 'A'; break;
  79             case '3' : pBuffer[0] = 'B'; break;
  80             case '4' : pBuffer[0] = 'C'; break;
  81             case '5' : pBuffer[0] = 'D'; break;
  82             case '6' : pBuffer[0] = 'E'; break;
  83             case '7' : pBuffer[0] = 'F'; break;
  84             default: OSL_FAIL("Already a signed value");
  85         }
  86     }
  87
  88     // report precision
  89     return nRet;
  90 }
  91
  92 sal_Int32
  93 getValueOf (sal_Int32 nValue, sal_Char* pBuffer)
  94 {
  95     sal_Int32 nChar = 0;
  96     if (nValue < 0)
  97     {
  98         pBuffer [nChar++] = '-';
  99         nValue *= -1;
 100     }
 101     else
 102         if (nValue == 0)
 103         {
 104             pBuffer [nChar++] = '0';
 105             return nChar;
 106         }
 107
 108     sal_Char  pInvBuffer [32];
 109     sal_Int32 nInvChar = 0;
 110     while (nValue > 0)
 111     {
 112         pInvBuffer [nInvChar++] = '0' + nValue % 10;
 113         nValue /= 10;
 114     }
 115     while (nInvChar > 0)
 116     {
 117         pBuffer [nChar++] = pInvBuffer [--nInvChar];
 118     }
 119
 120     return nChar;
 121 }
 122
 123 sal_Int32
 124 appendStr (const sal_Char* pSrc, sal_Char* pDst)
 125 {
 126     sal_Int32 nBytes = strlen (pSrc);
 127     strncpy (pDst, pSrc, nBytes + 1);
 128
 129     return nBytes;
 130 }
 131
 132 /*
 133  * copy strings to file
 134  */
 135
 136 bool
 137 WritePS (osl::File* pFile, const sal_Char* pString)
 138 {
 139     sal_uInt64 nInLength = rtl_str_getLength (pString);
 140     sal_uInt64 nOutLength = 0;
 141
 142     if (nInLength > 0 && pFile)
 143         pFile->write (pString, nInLength, nOutLength);
 144
 145     return nInLength == nOutLength;
 146 }
 147
 148 bool
 149 WritePS (osl::File* pFile, const sal_Char* pString, sal_uInt64 nInLength)
 150 {
 151     sal_uInt64 nOutLength = 0;
 152
 153     if (nInLength > 0 && pFile)
 154         pFile->write (pString, nInLength, nOutLength);
 155
 156     return nInLength == nOutLength;
 157 }
 158
 159 bool
 160 WritePS (osl::File* pFile, const OString &rString)
 161 {
 162     sal_uInt64 nInLength = rString.getLength();
 163     sal_uInt64 nOutLength = 0;
 164
 165     if (nInLength > 0 && pFile)
 166         pFile->write (rString.getStr(), nInLength, nOutLength);
 167
 168     return nInLength == nOutLength;
 169 }
 170
 171 bool
 172 WritePS (osl::File* pFile, const OUString &rString)
 173 {
 174     return WritePS (pFile, OUStringToOString(rString, RTL_TEXTENCODING_ASCII_US));
 175 }
 176
 177 /*
 178  * cache converter for use in postscript drawing routines
 179  */
 180
 181 ConverterFactory::ConverterFactory()
 182 {
 183 }
 184
 185 ConverterFactory::~ConverterFactory ()
 186 {
 187     for( std::map< rtl_TextEncoding, rtl_UnicodeToTextConverter >::const_iterator it = m_aConverters.begin(); it != m_aConverters.end(); ++it )
 188             rtl_destroyUnicodeToTextConverter (it->second);
 189 }
 190
 191 rtl_UnicodeToTextConverter
 192 ConverterFactory::Get (rtl_TextEncoding nEncoding)
 193 {
 194     if (rtl_isOctetTextEncoding( nEncoding ))
 195     {
 196         std::map< rtl_TextEncoding, rtl_UnicodeToTextConverter >::const_iterator it =
 197             m_aConverters.find( nEncoding );
 198         rtl_UnicodeToTextConverter aConverter;
 199         if (it == m_aConverters.end())
 200         {
 201             aConverter = rtl_createUnicodeToTextConverter (nEncoding);
 202             m_aConverters[nEncoding] = aConverter;
 203         }
 204         else
 205             aConverter = it->second;
 206         return aConverter;
 207     }
 208     return NULL;
 209 }
 210
 211 // wrapper for rtl_convertUnicodeToText that handles the usual cases for
 212 // textconversion in drawtext
 213 sal_Size
 214 ConverterFactory::Convert (const sal_Unicode *pText, int nTextLen,
 215                            unsigned char *pBuffer, sal_Size nBufferSize, rtl_TextEncoding nEncoding)
 216 {
 217     const sal_uInt32 nCvtFlags =  RTL_UNICODETOTEXT_FLAGS_UNDEFINED_QUESTIONMARK
 218         | RTL_UNICODETOTEXT_FLAGS_INVALID_QUESTIONMARK ;
 219     sal_uInt32  nCvtInfo;
 220     sal_Size    nCvtChars;
 221
 222     rtl_UnicodeToTextConverter aConverter = Get (nEncoding);
 223     rtl_UnicodeToTextContext   aContext   = rtl_createUnicodeToTextContext (aConverter);
 224
 225     sal_Size nSize = rtl_convertUnicodeToText (aConverter, aContext,
 226                                                pText, nTextLen, reinterpret_cast<char*>(pBuffer), nBufferSize,
 227                                                nCvtFlags, &nCvtInfo, &nCvtChars);
 228
 229     rtl_destroyUnicodeToTextContext (aConverter, aContext);
 230
 231     return nSize;
 232 }
 233
 234 namespace
 235 {
 236     class theConverterFactory
 237         : public rtl::Static<ConverterFactory, theConverterFactory>
 238     {
 239     };
 240 }
 241
 242 ConverterFactory& GetConverterFactory()
 243 {
 244     return theConverterFactory::get();
 245 }
 246
 247 } /* namespace psp */
 248
 249 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */