1 #include "NodeMessage.h" 2 #include <StorageKit.h> 3 #include <fs_attr.h> 4 #include <stdlib.h> 5 6 /* 7 These functions gives a nice BMessage interface to node attributes, 8 by letting you transfer attributes to and from BMessages. It makes 9 it so you can use all the convenient Find...() and Add...() functions 10 provided by BMessage for attributes too. You use it as follows: 11 12 BMessage m; 13 BNode n(path); 14 if (reading) { n>>m; printf("woohoo=%s\n",m.FindString("woohoo")) } 15 else { m.AddString("woohoo","it's howdy doody time"); n<<m; } 16 17 If there is more than one data item with a given name, the first 18 item is the one writen to the node. 19 */ 20 _EXPORT BNode& operator<<(BNode& n, const BMessage& m) 21 { 22 #if defined(HAIKU_TARGET_PLATFORM_DANO) 23 const 24 #endif 25 char *name; 26 type_code type; 27 ssize_t bytes; 28 const void *data; 29 30 for (int32 i = 0; 31 m.GetInfo(B_ANY_TYPE, i, &name, &type) == 0; 32 i++) { 33 m.FindData (name,type,0,&data,&bytes); 34 n.WriteAttr(name,type,0, data, bytes); 35 } 36 37 return n; 38 } 39 40 _EXPORT BNode& operator>>(BNode& n, BMessage& m) 41 { 42 char name[B_ATTR_NAME_LENGTH]; 43 attr_info info; 44 char *buf = NULL; 45 46 n.RewindAttrs(); 47 while (n.GetNextAttrName(name) == B_OK) { 48 if (n.GetAttrInfo(name,&info) != B_OK) 49 continue; 50 51 // resize the buffer 52 if (char *newBuffer = (char*)realloc(buf, info.size)) 53 buf = newBuffer; 54 else 55 continue; 56 57 info.size=n.ReadAttr(name,info.type,0,buf,info.size); 58 if (info.size >= 0) 59 m.AddData(name,info.type,buf,info.size); 60 } 61 n.RewindAttrs(); 62 63 free(buf); 64 65 return n; 66 } 67