libXdmcp git update 27/5/2010

1 files changed, 244 insertions, 0 deletions

diff --git a/libXdmcp/Read.c b/libXdmcp/Read.c
new file mode 100644
index 000000000..946a611e9
--- /dev/null
+++ b/libXdmcp/Read.c
@@ -0,0 +1,244 @@
+/*

+Copyright 1989, 1998  The Open Group

+

+Permission to use, copy, modify, distribute, and sell this software and its

+documentation for any purpose is hereby granted without fee, provided that

+the above copyright notice appear in all copies and that both that

+copyright notice and this permission notice appear in supporting

+documentation.

+

+The above copyright notice and this permission notice shall be included in

+all copies or substantial portions of the Software.

+

+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+

+Except as contained in this notice, the name of The Open Group shall not be

+used in advertising or otherwise to promote the sale, use or other dealings

+in this Software without prior written authorization from The Open Group.

+ *

+ * Author:  Keith Packard, MIT X Consortium

+ */

+

+#ifdef HAVE_CONFIG_H

+#include <config.h>

+#endif

+#include <X11/Xos.h>

+#include <X11/X.h>

+#include <X11/Xmd.h>

+#include <X11/Xdmcp.h>

+#include <stdlib.h>

+

+int

+XdmcpReadHeader (XdmcpBufferPtr buffer, XdmcpHeaderPtr header)

+{

+    if (XdmcpReadCARD16 (buffer, &header->version) &&

+        XdmcpReadCARD16 (buffer, &header->opcode) &&

+	XdmcpReadCARD16 (buffer, &header->length))

+	return TRUE;

+    return FALSE;

+}

+

+int

+XdmcpReadRemaining (const XdmcpBufferPtr  buffer)

+{

+    return buffer->count - buffer->pointer;

+}

+

+int

+XdmcpReadARRAY8 (XdmcpBufferPtr buffer, ARRAY8Ptr array)

+{

+    int	    i;

+

+    /*

+     * When returning FALSE, guarantee that array->data = 0.

+     * This allows the user to safely call XdmcpDisposeARRAY8(array)

+     * regardless of the return value below.

+     * Note that XdmcpDisposeARRAY*(array) will call free(array->data),

+     * so we must guarantee that array->data is NULL or a malloced pointer.

+     */

+    if (!XdmcpReadCARD16 (buffer, &array->length)) {

+ 	array->data = NULL;

+	return FALSE;

+    }

+    if (!array->length)

+    {

+	array->data = NULL;

+	return TRUE;

+    }

+    array->data = (CARD8 *) malloc(array->length * sizeof (CARD8));

+    if (!array->data)

+	return FALSE;

+    for (i = 0; i < (int)array->length; i++)

+    {

+	if (!XdmcpReadCARD8 (buffer, &array->data[i]))

+	{

+	    free(array->data);

+	    array->data = NULL;

+	    array->length = 0;

+	    return FALSE;

+	}

+    }

+    return TRUE;

+}

+

+int

+XdmcpReadARRAY16 (XdmcpBufferPtr buffer, ARRAY16Ptr array)

+{

+    int	    i;

+

+    /*

+     * When returning FALSE, guarantee that array->data = 0.

+     * This allows the user to safely call XdmcpDisposeARRAY16(array)

+     * regardless of the return value below.

+     * Note that XdmcpDisposeARRAY*(array) will call free(array->data),

+     * so we must guarantee that array->data is NULL or a malloced pointer.

+     */

+    if (!XdmcpReadCARD8 (buffer, &array->length)) {

+	array->data = NULL;

+	return FALSE;

+    }

+    if (!array->length)

+    {

+	array->data = NULL;

+	return TRUE;

+    }

+    array->data = (CARD16 *) malloc(array->length * sizeof (CARD16));

+    if (!array->data)

+	return FALSE;

+    for (i = 0; i < (int)array->length; i++)

+    {

+	if (!XdmcpReadCARD16 (buffer, &array->data[i]))

+	{

+	    free(array->data);

+	    array->data = NULL;

+	    array->length = 0;

+	    return FALSE;

+	}

+    }

+    return TRUE;

+}

+

+int

+XdmcpReadARRAY32 (XdmcpBufferPtr buffer, ARRAY32Ptr array)

+{

+    int	    i;

+

+    /*

+     * When returning FALSE, guarantee that array->data = 0.

+     * This allows the user to safely call XdmcpDisposeARRAY32(array)

+     * regardless of the return value below.

+     * Note that XdmcpDisposeARRAY*(array) will call free(array->data),

+     * so we must guarantee that array->data is NULL or a malloced pointer.

+     */

+    if (!XdmcpReadCARD8 (buffer, &array->length)) {

+	array->data = NULL;

+	return FALSE;

+    }

+    if (!array->length)

+    {

+	array->data = NULL;

+	return TRUE;

+    }

+    array->data = (CARD32 *) malloc(array->length * sizeof (CARD32));

+    if (!array->data)

+	return FALSE;

+    for (i = 0; i < (int)array->length; i++)

+    {

+	if (!XdmcpReadCARD32 (buffer, &array->data[i]))

+	{

+	    free(array->data);

+	    array->data = NULL;

+	    array->length = 0;

+	    return FALSE;

+	}

+    }

+    return TRUE;

+}

+

+int

+XdmcpReadARRAYofARRAY8 (XdmcpBufferPtr buffer, ARRAYofARRAY8Ptr array)

+{

+    CARD8    i;

+

+    /*

+     * When returning FALSE, guarantee that array->data = 0.

+     * This allows the user to safely call XdmcpDisposeARRAYofARRAY8(array)

+     * regardless of the return value below.

+     * Note that XdmcpDisposeARRAY*(array) will call free(array->data),

+     * so we must guarantee that array->data is NULL or a malloced pointer.

+     */

+    if (!XdmcpReadCARD8 (buffer, &array->length)) {

+	array->data = NULL;

+	return FALSE;

+    }

+    if (!array->length)

+    {

+	array->data = NULL;

+	return TRUE;

+    }

+    array->data = (ARRAY8 *) malloc(array->length * sizeof (ARRAY8));

+    if (!array->data)

+	return FALSE;

+    for (i = 0; i < array->length; i++)

+    {

+	if (!XdmcpReadARRAY8 (buffer, &array->data[i]))

+	{

+	    /*

+	     * We must free all of the arrays allocated thus far in the loop

+	     * and free array->data and finally set array->data = 0;

+	     * The easiest way to do this is to reset the length and call

+	     * XdmcpDisposeARRAYofARRAY8(array).

+	     */

+	    array->length = i;

+	    XdmcpDisposeARRAYofARRAY8(array);

+	    return FALSE;

+	}

+    }

+    return TRUE;

+}

+

+int

+XdmcpReadCARD8 (XdmcpBufferPtr buffer, CARD8Ptr valuep)

+{

+    if (buffer->pointer >= buffer->count)

+	return FALSE;

+    *valuep = (CARD8) buffer->data[buffer->pointer++];

+    return TRUE;

+}

+

+int

+XdmcpReadCARD16 (XdmcpBufferPtr buffer, CARD16Ptr valuep)

+{

+    CARD8   high, low;

+

+    if (XdmcpReadCARD8 (buffer, &high) &&

+        XdmcpReadCARD8 (buffer, &low))

+    {

+	*valuep = (((CARD16) high) << 8) | ((CARD16) low);

+	return TRUE;

+    }

+    return FALSE;

+}

+

+int

+XdmcpReadCARD32 (XdmcpBufferPtr buffer, CARD32Ptr valuep)

+{

+    CARD8   byte0, byte1, byte2, byte3;

+    if (XdmcpReadCARD8 (buffer, &byte0) &&

+        XdmcpReadCARD8 (buffer, &byte1) &&

+	XdmcpReadCARD8 (buffer, &byte2) &&

+	XdmcpReadCARD8 (buffer, &byte3))

+    {

+	*valuep = (((CARD32) byte0) << 24) |

+		  (((CARD32) byte1) << 16) |

+		  (((CARD32) byte2) << 8) |

+		  (((CARD32) byte3));

+	return TRUE;

+    }

+    return FALSE;

+}