Add forgotten implementation for fourcc

It was pulled from types.hpp recently.

fourcc.cpp

@@ -0,0 +1,71 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * libgim is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with libgim.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011 Danny Robson <danny@nerdcruft.net>
+ */
+
+#include "fourcc.hpp"
+
+
+fourcc
+fourcc::from_chars (uint8_t a, uint8_t b, uint8_t c, uint8_t d) {
+    fourcc lhs;
+
+    lhs.data[0] = a;
+    lhs.data[1] = b;
+    lhs.data[2] = c;
+    lhs.data[3] = d;
+
+    return lhs;
+}
+
+
+fourcc
+fourcc::from_str (const char data[4]) {
+    fourcc lhs;
+
+    lhs.data[0] = (uint8_t)data[0];
+    lhs.data[1] = (uint8_t)data[1];
+    lhs.data[2] = (uint8_t)data[2];
+    lhs.data[3] = (uint8_t)data[3];
+
+    return lhs;
+}
+
+
+bool
+fourcc::operator== (const char rhs[4]) const {
+    return data[0] == rhs[0] &&
+           data[1] == rhs[1] &&
+           data[2] == rhs[2] &&
+           data[3] == rhs[3];
+}
+
+
+fourcc::operator uint32_t (void) const {
+    return (uint32_t)(data[0] << 24U |
+                      data[1] << 16U |
+                      data[2] <<  8U |
+                      data[3]);
+}
+
+
+ostream&
+operator<< (ostream &os, fourcc f) {
+    os << f.data[0] << f.data[1] << f.data[2] << f.data[3];
+    return os;
+}
+

fourcc.hpp

@@ -0,0 +1,38 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * libgim is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with libgim.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011 Danny Robson <danny@nerdcruft.net>
+ */
+
+#ifndef __UTIL_FOURCC_HPP
+#define __UTIL_FOURCC_HPP
+
+#include <iostream>
+#include <cstdint>
+
+struct fourcc {
+    uint8_t data[4];
+
+    static fourcc from_str(const char[4]);
+    static fourcc from_chars(uint8_t, uint8_t, uint8_t, uint8_t);
+
+    bool operator== (const char[4]) const;
+    operator uint32_t (void) const;
+};
+
+std::ostream& operator<< (std::ostream&, fourcc);
+
+#endif