Initial implementation of pin/pin

include/ipfs/pin/pin.h

@@ -0,0 +1,32 @@
+#ifndef IPFS_PIN_H
+    #define IPFS_PIN_H
+
+    #include "ipfs/util/errs.h"
+
+    #ifdef IPFS_PIN_C
+        const char *ipfs_pin_linkmap[] = {
+            "recursive",
+            "direct",
+            "indirect",
+            "internal",
+            "not pinned",
+            "any",
+            "all"
+        };
+    #else // IPFS_PIN_C
+        extern const char *ipfs_pin_map[];
+    #endif // IPFS_PIN_C
+    enum {
+        Recursive = 0,
+        Direct,
+        Indirect,
+        Internal,
+        NotPinned,
+        Any,
+        All
+    };
+
+    typedef int PinMode;
+
+    int ipfs_pin_init ();
+#endif // IPFS_PIN_H

include/ipfs/util/errs.h

@@ -26,6 +26,7 @@
         ErrResolveLimit,
         ErrInvalidSignature,
         ErrInvalidSignatureFmt,
-        ErrNoRecord
+        ErrNoRecord,
+        ErrCidDecodeFailed
     } ErrsIdx;
 #endif // IPFS_ERRS_H