39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
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internal
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String8 rntuple_description(Arena *arena, const RNTuple &anchor)
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{
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String8 desc = push_str8f(arena, "version %u.%u.%u.%u",
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anchor.GetVersionEpoch(),
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anchor.GetVersionMajor(),
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anchor.GetVersionMinor(),
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anchor.GetVersionPatch());
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return desc;
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}
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internal
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RNTuple_Info *get_rntuple_info(Arena *arena, const char *fname, const char *ntpl_name)
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{
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RNTuple_Info *info = arena_push_zeroed<RNTuple_Info>(arena);
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// Open the TFile
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TFile *tfile = TFile::Open(fname, "READ");
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if (!tfile) {
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fprintf(stderr, "Failed to open TFile.\n");
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return info;
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}
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defer { delete tfile; };
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// Get the RNTuple information
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const RNTuple *anchor = tfile->Get<RNTuple>(ntpl_name);
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if (anchor) {
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info->anchor = *anchor;
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info->header.start = anchor->GetSeekHeader();
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info->header.len = anchor->GetNBytesHeader();
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info->footer.start = anchor->GetSeekFooter();
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info->footer.len = anchor->GetNBytesFooter();
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} else {
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fprintf(stderr, "RNTuple '%s' not found in %s.\n", ntpl_name, fname);
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}
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return info;
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}
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