.

wcfs/internal/wcfs_misc.cpp

@@ -194,3 +194,22 @@ error errorf(const char *format, ...) {
 }
 
 }   // fmt::
+
+
+// strings::
+namespace strings {
+
+vector<string> split(const string &s, char sep) {
+    vector<string> r;
+    int psep_prev=-1, psep;
+    while (1) {
+        psep = s.find(sep, psep_prev+1);
+        if (psep == string::npos)
+            return r;
+
+        r.push_back(s.substr(psep_prev+1, sep-(psep_prev+1)));
+        psep_prev = sep;
+    }
+}
+
+}   // strings::

wcfs/internal/wcfs_misc.h

@@ -30,6 +30,9 @@ using std::tuple;
 using std::make_tuple;
 using std::tie;
 
+#include <vector>
+using std::vector;
+
 // nil is synonym for nullptr and NULL.
 const nullptr_t nil = nullptr;
 
@@ -137,6 +140,13 @@ error  errorf (const char *format, ...)
 }   // fmt::
 
 
+//  strings::
+namespace strings {
+
+vector<string> split(const string &s, char sep);
+
+}   // strings::
+
 
 // ---- misc ----
 

wcfs/internal/wcfs_virtmem.cpp

@@ -684,6 +684,13 @@ error WatchLink::recvReq(IContext *ctx, SrvReq *rx) {
     return SrvReq(wlink, stream, msg)
 }
 
+// _parsePinReq parses message into PinReq according to wcfs invalidation protocol.
+error _parsePinReq(PinReq *out, const string &msg) {
+    // pin <foid>) #<blk> @<at>
+    msgv = strings::split(msg, ' ');
+    if 
+}
+
 // _readline reads next raw line sent from wcfs.
 tuple<string, error> WatchLink::_readline() {
     WatchLink& wlink = *this;