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Truncate existing temp file in meta_partition constructor #93

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Merged
jermp merged 1 commit into from
Oct 6, 2025
Merged

Truncate existing temp file in meta_partition constructor #93

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8 changes: 6 additions & 2 deletions include/builders/external_memory_builder_partitioned_phf.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -281,7 +281,11 @@ struct external_memory_builder_partitioned_phf {

struct meta_partition {
meta_partition(std::string const& dir_name, uint64_t id)
: m_filename(dir_name + "/pthash.temp." + std::to_string(id)), m_size(0) {}
: m_filename(dir_name + "/pthash.temp." + std::to_string(id)), m_size(0) {
// Truncate the file if it exists from a previous run
std::ofstream truncate(m_filename.c_str(), std::ofstream::binary | std::ofstream::trunc);
truncate.close();
}

void push_back(hash_type hash) {
m_hashes.push_back(hash);
Expand Down Expand Up @@ -322,4 +326,4 @@ struct external_memory_builder_partitioned_phf {
};
};

} // namespace pthash
} // namespace pthash
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