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78782dcd53
A std::map is in an invalid state when just zero-initialized, and needs to be initialized by its constructor. As this initilization may be done after the first call to Register, a crash will typically happen. To fix this wrap all accesses to the map with a Meyers Singleton. Also remove the extra Array - most accesses are using the key, and the few format list iterations all sort the result afterwards anyway. Fixes #201.
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
#ifndef WRITEUSER
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#define WRITEUSER
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/**************************************************************************/
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/* File: writeuser.hh */
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/* Authors: many */
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/* Date: 10. Dec. 97 */
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/**************************************************************************/
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#include <filesystem>
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#include <functional>
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#include <optional>
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#include <meshing.hpp>
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namespace netgen {
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using namespace std::filesystem;
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typedef std::function<void (const Mesh & mesh, const filesystem::path & filename)> FWrite;
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typedef std::function<void (Mesh & mesh, const filesystem::path & filename)> FRead;
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typedef std::function<bool (const filesystem::path & filename)> FTest;
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struct UserFormatRegister {
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struct UserFormatEntry {
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string format;
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Array<string> extensions;
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optional<FRead> read;
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optional<FWrite> write;
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};
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static void Register(UserFormatEntry && entry);
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static const bool HaveFormat(string format);
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DLL_HEADER static const UserFormatEntry & Get(string format);
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template<typename TFunc>
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static void IterateFormats(TFunc func, bool need_read=false, bool need_write=false) {
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Array<string> import_formats;
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for(const auto & e: getFormats())
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if((!need_read || e.second.read) && (!need_write || e.second.write))
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import_formats.Append(e.second.format);
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QuickSort(import_formats);
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for(auto format : import_formats)
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func(Get(format));
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}
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DLL_HEADER static std::map<std::string, UserFormatEntry>& getFormats();
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};
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struct RegisterUserFormat {
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RegisterUserFormat(string format, Array<string> extensions, optional<FRead> read, optional<FWrite> write, FTest ftest = [](const filesystem::path & ){return true;})
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{
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UserFormatRegister::Register({format, std::move(extensions), std::move(read), std::move(write)});
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}
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};
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DLL_HEADER void ReadFile(Mesh & mesh, const filesystem::path & filename);
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DLL_HEADER void ReadUserFormat(Mesh & mesh, const filesystem::path & filename, const string & format = "");
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extern bool DLL_HEADER WriteUserFormat (const string & format,
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const Mesh & mesh,
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const filesystem::path & filename);
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extern void DLL_HEADER RegisterUserFormats (NgArray<const char*> & names,
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NgArray<const char*> & extensions);
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}
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#endif
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