xorg-server-1.4/hw/xwin/winclipboardtextconv.c

   1 /*
   2  *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
   3  *
   4  *Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  *"Software"), to deal in the Software without restriction, including
   7  *without limitation the rights to use, copy, modify, merge, publish,
   8  *distribute, sublicense, and/or sell copies of the Software, and to
   9  *permit persons to whom the Software is furnished to do so, subject to
  10  *the following conditions:
  11  *
  12  *The above copyright notice and this permission notice shall be
  13  *included in all copies or substantial portions of the Software.
  14  *
  15  *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
  19  *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  20  *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21  *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  *Except as contained in this notice, the name of Harold L Hunt II
  24  *shall not be used in advertising or otherwise to promote the sale, use
  25  *or other dealings in this Software without prior written authorization
  26  *from Harold L Hunt II.
  27  *
  28  * Authors:     Harold L Hunt II
  29  */
  30
  31 #ifdef HAVE_XWIN_CONFIG_H
  32 #include <xwin-config.h>
  33 #endif
  34 #include "win.h"
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37
  38 void
  39 winClipboardDOStoUNIX (char *pszSrc, int iLength);
  40 void
  41 winClipboardUNIXtoDOS (unsigned char **ppszData, int iLength);
  42
  43 /*
  44  * Convert \r\n to \n
  45  *
  46  * NOTE: This was heavily inspired by, Cygwin's
  47  * winsup/cygwin/fhandler.cc/fhandler_base::read ()
  48  */
  49
  50 void
  51 winClipboardDOStoUNIX (char *pszSrc, int iLength)
  52 {
  53   char                  *pszDest = pszSrc;
  54   char                  *pszEnd = pszSrc + iLength;
  55
  56   /* Loop until the last character */
  57   while (pszSrc < pszEnd)
  58     {
  59       /* Copy the current source character to current destination character */
  60       *pszDest = *pszSrc;
  61
  62       /* Advance to the next source character */
  63       pszSrc++;
  64
  65       /* Don't advance the destination character if we need to drop an \r */
  66       if (*pszDest != '\r' || *pszSrc != '\n')
  67         pszDest++;
  68     }
  69
  70   /* Move the terminating null */
  71   *pszDest = '\0';
  72 }
  73
  74
  75 /*
  76  * Convert \n to \r\n
  77  */
  78
  79 void
  80 winClipboardUNIXtoDOS (unsigned char **ppszData, int iLength)
  81 {
  82   int                   iNewlineCount = 0;
  83   unsigned char         *pszSrc = *ppszData;
  84   unsigned char         *pszEnd = pszSrc + iLength;
  85   unsigned char         *pszDest = NULL, *pszDestBegin = NULL;
  86
  87 #if 0
  88   ErrorF ("UNIXtoDOS () - Original data:\n%s\n", *ppszData);
  89 #endif
  90
  91   /* Count \n characters without leading \r */
  92   while (pszSrc < pszEnd)
  93     {
  94       /* Skip ahead two character if found set of \r\n */
  95       if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
  96         {
  97           pszSrc += 2;
  98           continue;
  99         }
 100
 101       /* Increment the count if found naked \n */
 102       if (*pszSrc == '\n')
 103         {
 104           iNewlineCount++;
 105         }
 106
 107       pszSrc++;
 108     }
 109
 110   /* Return if no naked \n's */
 111   if (iNewlineCount == 0)
 112     return;
 113
 114   /* Allocate a new string */
 115   pszDestBegin = pszDest = malloc (iLength + iNewlineCount + 1);
 116
 117   /* Set source pointer to beginning of data string */
 118   pszSrc = *ppszData;
 119
 120   /* Loop through all characters in source string */
 121   while (pszSrc < pszEnd)
 122     {
 123       /* Copy line endings that are already valid */
 124       if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
 125         {
 126           *pszDest = *pszSrc;
 127           *(pszDest + 1) = *(pszSrc + 1);
 128           pszDest += 2;
 129           pszSrc += 2;
 130           continue;
 131         }
 132
 133       /* Add \r to naked \n's */
 134       if (*pszSrc == '\n')
 135         {
 136           *pszDest = '\r';
 137           *(pszDest + 1) = *pszSrc;
 138           pszDest += 2;
 139           pszSrc += 1;
 140           continue;
 141         }
 142
 143       /* Copy normal characters */
 144       *pszDest = *pszSrc;
 145       pszSrc++;
 146       pszDest++;
 147     }
 148
 149   /* Put terminating null at end of new string */
 150   *pszDest = '\0';
 151
 152   /* Swap string pointers */
 153   free (*ppszData);
 154   *ppszData = pszDestBegin;
 155
 156 #if 0
 157   ErrorF ("UNIXtoDOS () - Final string:\n%s\n", pszDestBegin);
 158 #endif
 159 }