Xserver/dix/atom.c (et al.): Constify atom name strings.

 Inspired by X.org commits:

 commit 08093c25a91c07ab8af7cece9bba738b827cfd1b
 Author: Alan Coopersmith <alan.coopersmith@oracle.com>
 Date:   Mon Oct 24 23:16:30 2011 -0700

    Convert some malloc + strncpy pairs into strndup calls

    Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
    Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>

 commit 816b79dd061e9839cec94a4986a7820b70ca8a7f
 Author: Mikhail Gusarov <dottedmag@dottedmag.net>
 Date:   Thu May 13 03:45:21 2010 +0700

    Remove useless casts

    Signed-off-by: Mikhail Gusarov <dottedmag@dottedmag.net>
    Reviewed-by: Keith Packard <keithp@keithp.com>

 This PR ships a tiny change in MakeAtom, that we adopted.
 We did not adopt the full commit.

 commit 5623c27700b7b23a8dbbd8c8f45e5d4fa0c667e3
 Author: Alan Coopersmith <alan.coopersmith@sun.com>
 Date:   Mon Feb 2 19:25:14 2009 -0800

    Constify atom name strings

    Changes MakeAtom to take a const char * and NameForAtom to return them,
    since many callers pass pointers to constant strings stored in read-only
    ELF sections.   Updates in-tree callers as necessary to clear const
    mismatch warnings introduced by this change.

    Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
    Acked-by: Peter Hutterer <peter.hutterer@who-t.net>

 Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

2 files changed, 7 insertions, 8 deletions

diff --git a/nx-X11/programs/Xserver/dix/atom.c b/nx-X11/programs/Xserver/dix/atom.c
index fdacb2a6b..d569c2314 100644
--- a/nx-X11/programs/Xserver/dix/atom.c
+++ b/nx-X11/programs/Xserver/dix/atom.c
@@ -62,7 +62,7 @@ typedef struct _Node {
     struct _Node   *left,   *right;
     Atom a;
     unsigned int fingerPrint;
-    char   *string;
+    const char   *string;
 } NodeRec, *NodePtr;
 
 static Atom lastAtom = None;
@@ -116,13 +116,11 @@ MakeAtom(const char *string, unsigned len, Bool makeit)
 	}
 	else
 	{
-	    nd->string = (char *) malloc(len + 1);
+	    nd->string = strndup(string, len);
 	    if (!nd->string) {
 		free(nd);
 		return BAD_RESOURCE;
 	    }
-	    strncpy(nd->string, string, (int)len);
-	    nd->string[len] = 0;
 	}
 	if ((lastAtom + 1) >= tableLength) {
 	    NodePtr *table;
@@ -131,7 +129,8 @@ MakeAtom(const char *string, unsigned len, Bool makeit)
 					 tableLength * (2 * sizeof(NodePtr)));
 	    if (!table) {
 		if (nd->string != string)
-		    free(nd->string);
+		     /* nd->string has been strdup'ed */
+		    free((char *)nd->string);
 		free(nd);
 		return BAD_RESOURCE;
 	    }
@@ -155,7 +154,7 @@ ValidAtom(Atom atom)
     return (atom != None) && (atom <= lastAtom);
 }
 
-char *
+const char *
 NameForAtom(Atom atom)
 {
     NodePtr node;
@@ -178,7 +177,7 @@ FreeAtom(NodePtr patom)
     if(patom->right)
 	FreeAtom(patom->right);
     if (patom->a > XA_LAST_PREDEFINED)
-	free(patom->string);
+	free((char *)patom->string);
     free(patom);
 }
 
diff --git a/nx-X11/programs/Xserver/dix/dispatch.c b/nx-X11/programs/Xserver/dix/dispatch.c
index 044ba1c4b..8313d5bff 100644
--- a/nx-X11/programs/Xserver/dix/dispatch.c
+++ b/nx-X11/programs/Xserver/dix/dispatch.c
@@ -886,7 +886,7 @@ ProcInternAtom(register ClientPtr client)
 int
 ProcGetAtomName(register ClientPtr client)
 {
-    char *str;
+    const char *str;
     xGetAtomNameReply reply;
     int len;
     REQUEST(xResourceReq);