YQL-16239 Move purecalc to public

1 files changed, 54 insertions, 0 deletions

diff --git a/library/cpp/microbdb/microbdb.h b/library/cpp/microbdb/microbdb.h
new file mode 100644
index 00000000000..75218873374
--- /dev/null
+++ b/library/cpp/microbdb/microbdb.h
@@ -0,0 +1,54 @@
+#pragma once
+
+#include <util/folder/dirut.h>
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4706) /*assignment within conditional expression*/
+#pragma warning(disable : 4267) /*conversion from 'size_t' to 'type', possible loss of data*/
+#endif
+
+#include "align.h"
+#include "extinfo.h"
+#include "header.h"
+#include "reader.h"
+#include "heap.h"
+#include "file.h"
+#include "sorter.h"
+#include "input.h"
+#include "output.h"
+#include "sorterdef.h"
+
+inline int MakeSorterTempl(char path[/*FILENAME_MAX*/], const char* prefix) {
+    int ret = MakeTempDir(path, prefix);
+    if (!ret && strlcat(path, "%06d", FILENAME_MAX) > FILENAME_MAX - 100)
+        ret = EINVAL;
+    if (ret)
+        path[0] = 0;
+    return ret;
+}
+
+inline int GetMeta(TFile& file, TDatMetaPage* meta) {
+    ui8 buf[METASIZE], *ptr = buf;
+    ssize_t size = sizeof(buf), ret;
+    while (size && (ret = file.Read(ptr, size)) > 0) {
+        size -= ret;
+        ptr += ret;
+    }
+    if (size)
+        return MBDB_BAD_FILE_SIZE;
+    ptr = buf; // gcc 4.4 warning fix
+    *meta = *(TDatMetaPage*)ptr;
+    return (meta->MetaSig == METASIG) ? 0 : MBDB_BAD_METAPAGE;
+}
+
+template <class TRec>
+inline bool IsDatFile(const char* fname) {
+    TDatMetaPage meta;
+    TFile f(fname, RdOnly);
+    return !GetMeta(f, &meta) && meta.RecordSig == TRec::RecordSig;
+}
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif