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>

dix/atom.c

@@ -64,7 +64,7 @@ typedef struct _Node {
     struct _Node   *left,   *right;
     Atom a;
     unsigned int fingerPrint;
-    char   *string;
+    const char   *string;
 } NodeRec, *NodePtr;
 
 static Atom lastAtom = None;
@@ -75,7 +75,7 @@ static NodePtr *nodeTable;
 void FreeAtom(NodePtr patom);
 
 Atom
-MakeAtom(char *string, unsigned len, Bool makeit)
+MakeAtom(const char *string, unsigned len, Bool makeit)
 {
     NodePtr * np;
     unsigned i;
@@ -118,13 +118,14 @@ MakeAtom(char *string, unsigned len, Bool makeit)
 	}
 	else
 	{
-	    nd->string = xalloc(len + 1);
+	    char *newstring = xalloc(len + 1);
-	    if (!nd->string) {
+	    if (!newstring) {
 		xfree(nd);
 		return BAD_RESOURCE;
 	    }
-	    strncpy(nd->string, string, (int)len);
+	    strncpy(newstring, string, (int)len);
-	    nd->string[len] = 0;
+	    newstring[len] = 0;
+	    nd->string = newstring;
 	}
 	if ((lastAtom + 1) >= tableLength) {
 	    NodePtr *table;
@@ -157,7 +158,7 @@ ValidAtom(Atom atom)
     return (atom != None) && (atom <= lastAtom);
 }
 
-char *
+const char *
 NameForAtom(Atom atom)
 {
     NodePtr node;

dix/dispatch.c

@@ -901,7 +901,7 @@ ProcInternAtom(ClientPtr client)
 int
 ProcGetAtomName(ClientPtr client)
 {
-    char *str;
+    const char *str;
     xGetAtomNameReply reply;
     int len;
     REQUEST(xResourceReq);

hw/dmx/dmxfont.c

@@ -253,7 +253,7 @@ Bool dmxBELoadFont(ScreenPtr pScreen, FontPtr pFont)
 {
     DMXScreenInfo  *dmxScreen = &dmxScreens[pScreen->myNum];
     dmxFontPrivPtr  pFontPriv = FontGetPrivate(pFont, dmxFontPrivateIndex);
-    char           *name;
+    const char     *name;
     char          **oldFontPath = NULL;
     int             nOldPaths;
     Atom            name_atom, value_atom;
@@ -415,7 +415,7 @@ Bool dmxBELoadFont(ScreenPtr pScreen, FontPtr pFont)
     }
     if (!value_atom) return FALSE;
 
-    name = (char *)NameForAtom(value_atom);
+    name = NameForAtom(value_atom);
     if (!name) return FALSE;
 
     pFontPriv->font[pScreen->myNum] = 

hw/kdrive/ephyr/ephyrvideo.c

@@ -236,7 +236,7 @@ DoSimpleClip (BoxPtr a_dst_box,
 static Bool
 ephyrLocalAtomToHost (int a_local_atom, int *a_host_atom)
 {
-    char *atom_name=NULL;
+    const char *atom_name=NULL;
     int host_atom=None ;
 
     EPHYR_RETURN_VAL_IF_FAIL (a_host_atom, FALSE) ;

hw/xnest/Font.c

@@ -40,7 +40,7 @@ xnestRealizeFont(ScreenPtr pScreen, FontPtr pFont)
   int nprops;
   FontPropPtr props;
   int i;
-  char *name;
+  const char *name;
 
   FontSetPrivate(pFont, xnestFontPrivateIndex, NULL);
 
@@ -58,7 +58,7 @@ xnestRealizeFont(ScreenPtr pScreen, FontPtr pFont)
 
   if (!value_atom) return False;
 
-  name = (char *)NameForAtom(value_atom);
+  name = NameForAtom(value_atom);
 
   if (!name) return False;
 

include/dix.h

@@ -280,14 +280,14 @@ extern _X_EXPORT Bool ClientIsAsleep(
 /* atom.c */
 
 extern _X_EXPORT Atom MakeAtom(
-    char * /*string*/,
+    const char * /*string*/,
     unsigned /*len*/,
     Bool /*makeit*/);
 
 extern _X_EXPORT Bool ValidAtom(
     Atom /*atom*/);
 
-extern _X_EXPORT char *NameForAtom(
+extern _X_EXPORT const char *NameForAtom(
     Atom /*atom*/);
 
 extern _X_EXPORT void AtomError(void);

include/xkbsrv.h

@@ -880,7 +880,7 @@ extern _X_EXPORT XkbGeometryPtr XkbLookupNamedGeometry(
 );
 
 extern _X_EXPORT char *	_XkbDupString(
-	char *			/* str */
+	const char *		/* str */
 );
 
 extern _X_EXPORT void	XkbConvertCase(

xfixes/cursor.c

@@ -457,7 +457,7 @@ ProcXFixesGetCursorName (ClientPtr client)
     CursorPtr			pCursor;
     xXFixesGetCursorNameReply	reply;
     REQUEST(xXFixesGetCursorNameReq);
-    char *str;
+    const char *str;
     int len;
 
     REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
@@ -507,7 +507,7 @@ ProcXFixesGetCursorImageAndName (ClientPtr client)
     CursorPtr			pCursor;
     CARD32			*image;
     int				npixels;
-    char			*name;
+    const char			*name;
     int				nbytes, nbytesRound;
     int				width, height;
     int				rc, x, y;

xkb/xkb.c

@@ -3853,7 +3853,7 @@ register int i,bit;
 static Bool
 _XkbCheckTypeName(Atom name,int typeNdx)
 {
-char *	str;
+const char *	str;
 
     str= NameForAtom(name);
     if ((strcmp(str,"ONE_LEVEL")==0)||(strcmp(str,"TWO_LEVEL")==0)||

xkb/xkbfmisc.c

@@ -163,7 +163,7 @@ XkbWriteXKBKeymapForNames(	FILE *			file,
 				unsigned		want,
 				unsigned		need)
 {
-char *		tmp;
+const char *	tmp;
 unsigned	complete;
 XkbNamesPtr	old_names;
 int		multi_section;

xkb/xkbtext.c

@@ -70,16 +70,17 @@ char *rtrn;
 char *
 XkbAtomText(Atom atm,unsigned format)
 {
+const char	*atmstr;
 char	*rtrn,*tmp;
 
-    tmp= XkbAtomGetString(atm);
+    atmstr = XkbAtomGetString(atm);
-    if (tmp!=NULL) {
+    if (atmstr != NULL) {
 	int	len;
-	len= strlen(tmp)+1;
+	len= strlen(atmstr)+1;
 	if (len>BUFFER_SIZE)
 	    len= BUFFER_SIZE-2;
 	rtrn= tbGetBuffer(len);
-	strncpy(rtrn,tmp,len);
+	strncpy(rtrn,atmstr,len);
 	rtrn[len]= '\0';
     }
     else {
@@ -104,7 +105,8 @@ XkbVModIndexText(XkbDescPtr xkb,unsigned ndx,unsigned format)
 {
 register int len;
 register Atom *vmodNames;
-char *rtrn,*tmp;
+char *rtrn;
+const char *tmp;
 char  numBuf[20];
 
     if (xkb && xkb->names)
@@ -116,8 +118,10 @@ char  numBuf[20];
 	 tmp= "illegal";
     else if (vmodNames&&(vmodNames[ndx]!=None))
 	 tmp= XkbAtomGetString(vmodNames[ndx]);
-    if (tmp==NULL)
+    if (tmp==NULL) {
-	sprintf(tmp=numBuf,"%d",ndx);
+	sprintf(numBuf,"%d",ndx);
+	tmp = numBuf;
+    }
 
     len= strlen(tmp)+1;
     if (format==XkbCFile)

xkb/xkmread.c

@@ -51,7 +51,7 @@ XkbInternAtom(char *str,Bool only_if_exists)
 }
 
 char *
-_XkbDupString(char *str)
+_XkbDupString(const char *str)
 {
 char *new;