#include "NodeMessage.h"
#include <StorageKit.h>
#include <fs_attr.h>
#include <stdlib.h>
These functions gives a nice BMessage interface to node attributes,
by letting you transfer attributes to and from BMessages. It makes
it so you can use all the convenient Find...() and Add...() functions
provided by BMessage for attributes too. You use it as follows:
BMessage m;
BNode n(path);
if (reading) { n>>m; printf("woohoo=%s\n",m.FindString("woohoo")) }
else { m.AddString("woohoo","it's howdy doody time"); n<<m; }
If there is more than one data item with a given name, the first
item is the one writen to the node.
*/
_EXPORT BNode& operator<<(BNode& n, const BMessage& m)
{
#if defined(HAIKU_TARGET_PLATFORM_DANO)
const
#endif
char *name;
type_code type;
ssize_t bytes;
const void *data;
for (int32 i = 0;
m.GetInfo(B_ANY_TYPE, i, &name, &type) == 0;
i++) {
m.FindData (name,type,0,&data,&bytes);
n.WriteAttr(name,type,0, data, bytes);
}
return n;
}
_EXPORT BNode& operator>>(BNode& n, BMessage& m)
{
char name[B_ATTR_NAME_LENGTH];
attr_info info;
char *buf = NULL;
n.RewindAttrs();
while (n.GetNextAttrName(name) == B_OK) {
if (n.GetAttrInfo(name,&info) != B_OK)
continue;
if (char *newBuffer = (char*)realloc(buf, info.size))
buf = newBuffer;
else
continue;
info.size=n.ReadAttr(name,info.type,0,buf,info.size);
if (info.size >= 0)
m.AddData(name,info.type,buf,info.size);
}
n.RewindAttrs();
free(buf);
return n;
}
