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
38void
39winClipboardDOStoUNIX (char *pszSrc, int iLength);
40void
41winClipboardUNIXtoDOS (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
50void
51winClipboardDOStoUNIX (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
79void
80winClipboardUNIXtoDOS (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  winDebug("UNIXtoDOS () - Original data:'%s'\n", *ppszData);
88
89  /* Count \n characters without leading \r */
90  while (pszSrc < pszEnd)
91    {
92      /* Skip ahead two character if found set of \r\n */
93      if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
94	{
95	  pszSrc += 2;
96	  continue;
97	}
98
99      /* Increment the count if found naked \n */
100      if (*pszSrc == '\n')
101	{
102	  iNewlineCount++;
103	}
104
105      pszSrc++;
106    }
107
108  /* Return if no naked \n's */
109  if (iNewlineCount == 0)
110    return;
111
112  /* Allocate a new string */
113  pszDestBegin = pszDest = malloc (iLength + iNewlineCount + 1);
114
115  /* Set source pointer to beginning of data string */
116  pszSrc = *ppszData;
117
118  /* Loop through all characters in source string */
119  while (pszSrc < pszEnd)
120    {
121      /* Copy line endings that are already valid */
122      if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
123	{
124	  *pszDest = *pszSrc;
125	  *(pszDest + 1) = *(pszSrc + 1);
126	  pszDest += 2;
127	  pszSrc += 2;
128	  continue;
129	}
130
131      /* Add \r to naked \n's */
132      if (*pszSrc == '\n')
133	{
134	  *pszDest = '\r';
135	  *(pszDest + 1) = *pszSrc;
136	  pszDest += 2;
137	  pszSrc += 1;
138	  continue;
139	}
140
141      /* Copy normal characters */
142      *pszDest = *pszSrc;
143      pszSrc++;
144      pszDest++;
145    }
146
147  /* Put terminating null at end of new string */
148  *pszDest = '\0';
149
150  /* Swap string pointers */
151  free (*ppszData);
152  *ppszData = pszDestBegin;
153
154  winDebug("UNIXtoDOS () - Final string:'%s'\n", pszDestBegin);
155}
156