fc1ca2da5c
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25177 a95241bf-73f2-0310-859d-f6bbb57e9c96
67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
#include "NodeMessage.h"
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#include <StorageKit.h>
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#include <fs_attr.h>
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#include <stdlib.h>
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/*
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These functions gives a nice BMessage interface to node attributes,
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by letting you transfer attributes to and from BMessages. It makes
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it so you can use all the convenient Find...() and Add...() functions
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provided by BMessage for attributes too. You use it as follows:
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BMessage m;
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BNode n(path);
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if (reading) { n>>m; printf("woohoo=%s\n",m.FindString("woohoo")) }
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else { m.AddString("woohoo","it's howdy doody time"); n<<m; }
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If there is more than one data item with a given name, the first
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item is the one writen to the node.
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*/
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_EXPORT BNode& operator<<(BNode& n, const BMessage& m)
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{
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#if defined(HAIKU_TARGET_PLATFORM_DANO)
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const
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#endif
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char *name;
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type_code type;
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ssize_t bytes;
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const void *data;
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for (int32 i = 0;
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m.GetInfo(B_ANY_TYPE, i, &name, &type) == 0;
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i++) {
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m.FindData (name,type,0,&data,&bytes);
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n.WriteAttr(name,type,0, data, bytes);
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}
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return n;
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}
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_EXPORT BNode& operator>>(BNode& n, BMessage& m)
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{
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char name[B_ATTR_NAME_LENGTH];
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attr_info info;
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char *buf = NULL;
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n.RewindAttrs();
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while (n.GetNextAttrName(name) == B_OK) {
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if (n.GetAttrInfo(name,&info) != B_OK)
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continue;
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// resize the buffer
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if (char *newBuffer = (char*)realloc(buf, info.size))
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buf = newBuffer;
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else
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continue;
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info.size=n.ReadAttr(name,info.type,0,buf,info.size);
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if (info.size >= 0)
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m.AddData(name,info.type,buf,info.size);
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}
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n.RewindAttrs();
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free(buf);
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return n;
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}
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