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storages: overridable limits for loading portable_storage from binary

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moneromooo-monero 2021-01-06 13:19:58 +00:00
parent e144dd5b15
commit 372754a66e
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5 changed files with 63 additions and 33 deletions
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15
contrib/epee/include/storages/portable_storage.h
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@ -54,6 +54,13 @@ namespace epee
typedef epee::serialization::harray harray;
typedef storage_entry meta_entry;
struct limits_t
{
size_t n_objects;
size_t n_fields;
size_t n_strings; // not counting field names
};
portable_storage(){}
virtual ~portable_storage(){}
hsection open_section(const std::string& section_name, hsection hparent_section, bool create_if_notexist = false);
@ -84,8 +91,8 @@ namespace epee
//-------------------------------------------------------------------------------
bool store_to_binary(byte_slice& target, std::size_t initial_buffer_size = 8192);
bool load_from_binary(const epee::span<const uint8_t> target);
bool load_from_binary(const std::string& target) { return load_from_binary(epee::strspan<uint8_t>(target)); }
bool load_from_binary(const epee::span<const uint8_t> target, const limits_t *limits = NULL);
bool load_from_binary(const std::string& target, const limits_t *limits = NULL) { return load_from_binary(epee::strspan<uint8_t>(target), limits); }
template<class trace_policy>
bool dump_as_xml(std::string& targetObj, const std::string& root_name = "");
bool dump_as_json(std::string& targetObj, size_t indent = 0, bool insert_newlines = true);
@ -134,7 +141,7 @@ namespace epee
return false;//TODO: don't think i ever again will use xml - ambiguous and "overtagged" format
}
inline
bool portable_storage::load_from_binary(const epee::span<const uint8_t> source)
bool portable_storage::load_from_binary(const epee::span<const uint8_t> source, const limits_t *limits)
{
m_root.m_entries.clear();
if(source.size() < sizeof(storage_block_header))
@ -157,6 +164,8 @@ namespace epee
}
TRY_ENTRY();
throwable_buffer_reader buf_reader(source.data()+sizeof(storage_block_header), source.size()-sizeof(storage_block_header));
if (limits)
buf_reader.set_limits(limits->n_objects, limits->n_fields, limits->n_strings);
buf_reader.read(m_root);
return true;//TODO:
CATCH_ENTRY("portable_storage::load_from_binary", false);