vcl/unx/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 "psputil.hxx"
  22
  23 namespace psp {
  24
  25 /*
  26  * string convenience routines
  27  */
  28
  29 sal_Int32
  30 getHexValueOf (sal_Int32 nValue, OStringBuffer& pBuffer)
  31 {
  32     const static sal_Char pHex [0x10] = {
  33         '0', '1', '2', '3', '4', '5', '6', '7',
  34         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
  35
  36     pBuffer.append(pHex [(nValue & 0xF0) >> 4]);
  37     pBuffer.append(pHex [(nValue & 0x0F)     ]);
  38
  39     return 2;
  40 }
  41
  42 sal_Int32
  43 getAlignedHexValueOf (sal_Int32 nValue, OStringBuffer& pBuffer)
  44 {
  45     // get sign
  46     bool bNegative = nValue < 0;
  47     nValue = bNegative ? -nValue : nValue;
  48
  49     // get required buffer size, must be a multiple of two
  50     sal_Int32 nPrecision;
  51     if (nValue < 0x80)
  52         nPrecision = 2;
  53     else
  54         if (nValue < 0x8000)
  55             nPrecision = 4;
  56         else
  57             if (nValue < 0x800000)
  58                 nPrecision = 6;
  59             else
  60                 nPrecision = 8;
  61
  62     // convert the int into its hex representation, write it into the buffer
  63     sal_Int32 nRet = nPrecision;
  64     auto const start = pBuffer.getLength();
  65     while (nPrecision)
  66     {
  67         OStringBuffer scratch;
  68         nPrecision -= getHexValueOf (nValue % 256, scratch );
  69         pBuffer.insert(start, scratch.makeStringAndClear());
  70         nValue /= 256;
  71     }
  72
  73     // set sign bit
  74     if (bNegative)
  75     {
  76         switch (pBuffer[start])
  77         {
  78             case '0' : pBuffer[start] = '8'; break;
  79             case '1' : pBuffer[start] = '9'; break;
  80             case '2' : pBuffer[start] = 'A'; break;
  81             case '3' : pBuffer[start] = 'B'; break;
  82             case '4' : pBuffer[start] = 'C'; break;
  83             case '5' : pBuffer[start] = 'D'; break;
  84             case '6' : pBuffer[start] = 'E'; break;
  85             case '7' : pBuffer[start] = 'F'; break;
  86             default: OSL_FAIL("Already a signed value");
  87         }
  88     }
  89
  90     // report precision
  91     return nRet;
  92 }
  93
  94 sal_Int32
  95 getValueOf (sal_Int32 nValue, OStringBuffer& pBuffer)
  96 {
  97     sal_Int32 nChar = 0;
  98     if (nValue < 0)
  99     {
 100         pBuffer.append('-');
 101         ++nChar;
 102         nValue *= -1;
 103     }
 104     else
 105         if (nValue == 0)
 106         {
 107             pBuffer.append('0');
 108             ++nChar;
 109             return nChar;
 110         }
 111
 112     sal_Char  pInvBuffer [32];
 113     sal_Int32 nInvChar = 0;
 114     while (nValue > 0)
 115     {
 116         pInvBuffer [nInvChar++] = '0' + nValue % 10;
 117         nValue /= 10;
 118     }
 119     while (nInvChar > 0)
 120     {
 121         pBuffer.append(pInvBuffer [--nInvChar]);
 122         ++nChar;
 123     }
 124
 125     return nChar;
 126 }
 127
 128 sal_Int32
 129 appendStr (const sal_Char* pSrc, OStringBuffer& pDst)
 130 {
 131     sal_Int32 nBytes = strlen (pSrc);
 132     pDst.append(pSrc, nBytes);
 133
 134     return nBytes;
 135 }
 136
 137 /*
 138  * copy strings to file
 139  */
 140
 141 bool
 142 WritePS (osl::File* pFile, const sal_Char* pString)
 143 {
 144     sal_uInt64 nInLength = rtl_str_getLength (pString);
 145     sal_uInt64 nOutLength = 0;
 146
 147     if (nInLength > 0 && pFile)
 148         pFile->write (pString, nInLength, nOutLength);
 149
 150     return nInLength == nOutLength;
 151 }
 152
 153 bool
 154 WritePS (osl::File* pFile, const sal_Char* pString, sal_uInt64 nInLength)
 155 {
 156     sal_uInt64 nOutLength = 0;
 157
 158     if (nInLength > 0 && pFile)
 159         pFile->write (pString, nInLength, nOutLength);
 160
 161     return nInLength == nOutLength;
 162 }
 163
 164 bool
 165 WritePS (osl::File* pFile, const OString &rString)
 166 {
 167     sal_uInt64 nInLength = rString.getLength();
 168     sal_uInt64 nOutLength = 0;
 169
 170     if (nInLength > 0 && pFile)
 171         pFile->write (rString.getStr(), nInLength, nOutLength);
 172
 173     return nInLength == nOutLength;
 174 }
 175
 176 bool
 177 WritePS (osl::File* pFile, const OUString &rString)
 178 {
 179     return WritePS (pFile, OUStringToOString(rString, RTL_TEXTENCODING_ASCII_US));
 180 }
 181
 182 } /* namespace psp */
 183
 184 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */