Started C interface.

src/c_interface.cpp

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+/*  This file is part of identiconpp.
+ *  Copyright © 2019 tastytea <tastytea@tastytea.de>
+ *
+ *  This program 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, version 3.
+ *
+ *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <vector>
+#include <memory>
+#include <exception>
+#include <Magick++/Image.h>
+#include <Magick++/Blob.h>
+#include "identiconpp.hpp"
+#include "debug.hpp"
+#include "identiconpp_c.h"
+
+std::unique_ptr<Identiconpp> identicon;
+
+bool identiconpp_setup(const uint8_t columns, const uint8_t rows,
+                       identiconpp_algorithm type,
+                       const char background[9],
+                       const char foreground[][9],
+                       const uint8_t foreground_len,
+                       const uint8_t padding[2])
+{
+    Identiconpp::algorithm algo;
+    switch (type)
+    {
+        case identiconpp_ltr_symmetric:
+        {
+            algo = Identiconpp::algorithm::ltr_symmetric;
+            break;
+        }
+        case identiconpp_ltr_asymmetric:
+        {
+            algo = Identiconpp::algorithm::ltr_asymmetric;
+            break;
+        }
+        case identiconpp_sigil:
+        {
+            algo = Identiconpp::algorithm::sigil;
+            break;
+        }
+    }
+
+    std::vector<string> vforeground;
+    for (uint8_t i = 0; i < foreground_len; ++i)
+    {
+        vforeground.push_back(foreground[i]);
+    }
+
+    try
+    {
+        identicon = std::make_unique<Identiconpp>(
+                    Identiconpp(columns, rows, algo, background, vforeground,
+                                { padding[0], padding[1] }));
+    }
+    catch (const std::exception &e)
+    {
+        return false;
+    }
+
+    return true;
+}
+
+bool identiconpp_generate(MagickWand *wand,
+                          const char digest[], const uint16_t width)
+{
+    Magick::Image img = identicon->generate(digest, width);
+    Magick::Blob blob;
+    img.write(&blob);
+    MagickReadImageBlob(wand, blob.data(), blob.length());
+}

src/identiconpp_c.h

@@ -0,0 +1,49 @@
+/*  This file is part of identiconpp.
+ *  Copyright © 2019 tastytea <tastytea@tastytea.de>
+ *
+ *  This program 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, version 3.
+ *
+ *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDENTICONPP_H
+#define IDENTICONPP_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    #include <stdbool.h>
+    #include <stdint.h>
+    #include <stddef.h>
+    #include <MagickWand/MagickWand.h>
+
+    typedef enum
+    {
+        identiconpp_ltr_symmetric,
+        identiconpp_ltr_asymmetric,
+        identiconpp_sigil
+    } identiconpp_algorithm;
+
+    bool identiconpp_setup(const uint8_t columns, const uint8_t rows,
+                           identiconpp_algorithm type,
+                           const char background[9],
+                           const char foreground[][9],
+                           const uint8_t foreground_len,
+                           const uint8_t padding[2]);
+    bool identiconpp_generate(MagickWand *wand,
+                              const char digest[], const uint16_t width);
+
+#ifdef __cplusplus
+}
+#endif
+#endif  // IDENTICONPP_H