X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=binmerger.cpp;fp=binmerger.cpp;h=480bd8321d645a5453d2d840ad1e3a6697eb181c;hb=1e683bba44dd60c04eea0cd8b6d1a7e36ad4acc8;hp=0000000000000000000000000000000000000000;hpb=4fe8de31aebd9dfe4d4c1616d52599f60cb32204;p=remoteglot-book

diff --git a/binmerger.cpp b/binmerger.cpp
new file mode 100644
index 0000000..480bd83
--- /dev/null
+++ b/binmerger.cpp
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <mtbl.h>
+#include <memory>
+#include <string>
+#include <string.h>
+#include <assert.h>
+#include "count.h"
+
+using namespace std;
+
+
+void merge_count(void* userdata,
+                 const uint8_t *key, size_t len_key,
+		 const uint8_t *val0, size_t len_val0,
+		 const uint8_t *val1, size_t len_val1,
+		 uint8_t **merged_val, size_t *len_merged_val)
+{
+	assert(len_val0 == sizeof(Count));
+	assert(len_val1 == sizeof(Count));
+
+	const Count* c0 = reinterpret_cast<const Count*>(val0);
+	const Count* c1 = reinterpret_cast<const Count*>(val1);
+	unique_ptr<Count> c((Count *)malloc(sizeof(Count)));  // Needs to be with malloc, per merger spec.
+
+	c->white = c0->white + c1->white;
+	c->draw = c0->draw + c1->draw;
+	c->black = c0->black + c1->black;
+	c->opening_num = c0->opening_num;  // Arbitrary choice.
+	c->sum_white_elo = c0->sum_white_elo + c1->sum_white_elo;
+	c->sum_black_elo = c0->sum_black_elo + c1->sum_black_elo;
+	c->num_elo = c0->num_elo + c1->num_elo;
+
+	*merged_val = reinterpret_cast<uint8_t *>(c.release());
+	*len_merged_val = sizeof(Count);
+}
+
+int main(int argc, char **argv)
+{
+	mtbl_merger_options* mopt = mtbl_merger_options_init();
+	mtbl_merger_options_set_merge_func(mopt, merge_count, NULL);
+	mtbl_merger* merger = mtbl_merger_init(mopt);
+
+	for (int i = 1; i < argc - 1; ++i) {
+		mtbl_reader* mtbl = mtbl_reader_init(argv[i], NULL);
+		mtbl_merger_add_source(merger, mtbl_reader_source(mtbl));
+	}
+
+	mtbl_writer* writer = mtbl_writer_init(argv[argc - 1], NULL);
+	mtbl_source_write(mtbl_merger_source(merger), writer);
+	mtbl_writer_destroy(&writer);
+}