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
35#include <stdlib.h>
36#include "internal.h"
37
38/*
39 * Convert \r\n to \n
40 *
41 * NOTE: This was heavily inspired by, Cygwin's
42 * winsup/cygwin/fhandler.cc/fhandler_base::read ()
43 */
44
45void
46winClipboardDOStoUNIX(char *pszSrc, int iLength)
47{
48    char *pszDest = pszSrc;
49    char *pszEnd = pszSrc + iLength;
50
51    /* Loop until the last character */
52    while (pszSrc < pszEnd) {
53        /* Copy the current source character to current destination character */
54        *pszDest = *pszSrc;
55
56        /* Advance to the next source character */
57        pszSrc++;
58
59        /* Don't advance the destination character if we need to drop an \r */
60        if (*pszDest != '\r' || *pszSrc != '\n')
61            pszDest++;
62    }
63
64    /* Move the terminating null */
65    *pszDest = '\0';
66}
67
68/*
69 * Convert \n to \r\n
70 */
71
72void
73winClipboardUNIXtoDOS(char **ppszData, int iLength)
74{
75    int iNewlineCount = 0;
76    char *pszSrc = *ppszData;
77    char *pszEnd = pszSrc + iLength;
78    char *pszDest = NULL, *pszDestBegin = NULL;
79
80    winDebug("UNIXtoDOS () - Original data:'%s'\n", *ppszData);
81
82    /* Count \n characters without leading \r */
83    while (pszSrc < pszEnd) {
84        /* Skip ahead two character if found set of \r\n */
85        if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n') {
86            pszSrc += 2;
87            continue;
88        }
89
90        /* Increment the count if found naked \n */
91        if (*pszSrc == '\n') {
92            iNewlineCount++;
93        }
94
95        pszSrc++;
96    }
97
98    /* Return if no naked \n's */
99    if (iNewlineCount == 0)
100        return;
101
102    /* Allocate a new string */
103    pszDestBegin = pszDest = malloc(iLength + iNewlineCount + 1);
104
105    /* Set source pointer to beginning of data string */
106    pszSrc = *ppszData;
107
108    /* Loop through all characters in source string */
109    while (pszSrc < pszEnd) {
110        /* Copy line endings that are already valid */
111        if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n') {
112            *pszDest = *pszSrc;
113            *(pszDest + 1) = *(pszSrc + 1);
114            pszDest += 2;
115            pszSrc += 2;
116            continue;
117        }
118
119        /* Add \r to naked \n's */
120        if (*pszSrc == '\n') {
121            *pszDest = '\r';
122            *(pszDest + 1) = *pszSrc;
123            pszDest += 2;
124            pszSrc += 1;
125            continue;
126        }
127
128        /* Copy normal characters */
129        *pszDest = *pszSrc;
130        pszSrc++;
131        pszDest++;
132    }
133
134    /* Put terminating null at end of new string */
135    *pszDest = '\0';
136
137    /* Swap string pointers */
138    free(*ppszData);
139    *ppszData = pszDestBegin;
140
141    winDebug("UNIXtoDOS () - Final string:'%s'\n", pszDestBegin);
142}
143