ENH: SHA1Digest::str() returns std::string of digest directly

etc/codeTemplates/codeStream/fixedValueFvPatchScalarFieldTemplate.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 20101-2011 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2011-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License

src/OpenFOAM/primitives/hashes/SHA1/SHA1Digest.C

@@ -101,6 +101,22 @@ bool Foam::SHA1Digest::empty() const
 }
 
 
+std::string Foam::SHA1Digest::str() const
+{
+    std::string buf;
+    buf.resize(length*2);
+
+    unsigned nChar = 0;
+    for (unsigned i = 0; i < length; ++i)
+    {
+        buf[nChar++] = hexChars[((v_[i] >> 4) & 0xF)];
+        buf[nChar++] = hexChars[(v_[i] & 0xF)];
+    }
+
+    return buf;
+}
+
+
 // * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * * //
 
 bool Foam::SHA1Digest::operator==(const SHA1Digest& rhs) const

src/OpenFOAM/primitives/hashes/SHA1/SHA1Digest.H

@@ -80,6 +80,9 @@ public:
     //- Return true if the digest is empty (ie, all zero).
     bool empty() const;
 
+    //- Return string representation
+    std::string str() const;
+
     //- Equality operator
     bool operator==(const SHA1Digest&) const;