Refactor info generation

1 files changed, 82 insertions, 0 deletions

diff --git a/src/Info.cpp b/src/Info.cpp
new file mode 100644
index 0000000..7b411f7
--- /dev/null
+++ b/src/Info.cpp
@@ -0,0 +1,82 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "Info.hpp"
+
+#include <cstdio>
+#include <cstring>
+#include <string>
+#include <unistd.h>
+
+
+namespace MinedMap {
+
+void Info::writeJSON(const char *filename) {
+	const std::string tmpfile = std::string(filename) + ".tmp";
+
+	FILE *f = fopen(tmpfile.c_str(), "w");
+	if (!f) {
+		std::fprintf(stderr, "Unable to open %s: %s\n", tmpfile.c_str(), std::strerror(errno));
+		return;
+	}
+
+	fprintf(f, "{\n");
+	fprintf(f, "  \"info\" : {\n");
+	fprintf(f, "    \"minX\" : %i,\n", minX);
+	fprintf(f, "    \"maxX\" : %i,\n", maxX);
+	fprintf(f, "    \"minZ\" : %i,\n", minZ);
+	fprintf(f, "    \"maxZ\" : %i\n", maxZ);
+	fprintf(f, "  },\n");
+	fprintf(f, "  \"regions\" : [\n");
+
+	for (int z = minZ; z <= maxZ; z++) {
+		fprintf(f, "    [");
+
+		for (int x = minX; x <= maxX; x++) {
+			fprintf(f, "%s", regions.count(std::make_pair(x, z)) ? "true" : "false");
+
+			if (x < maxX)
+				fprintf(f, ", ");
+		}
+
+		if (z < maxZ)
+			fprintf(f, "],\n");
+		else
+			fprintf(f, "]\n");
+	}
+
+	fprintf(f, "  ]\n");
+	fprintf(f, "}\n");
+
+	fclose(f);
+
+	if (std::rename(tmpfile.c_str(), filename) < 0) {
+		std::fprintf(stderr, "Unable to save %s: %s\n", filename, std::strerror(errno));
+		unlink(tmpfile.c_str());
+	}
+}
+
+}