diff --git a/src/StringCRC32.hpp b/src/StringCRC32.hpp new file mode 100644 index 0000000..6c3ac8c --- /dev/null +++ b/src/StringCRC32.hpp @@ -0,0 +1,148 @@ +#ifndef id42C91D2875AE4E56BA61051619B58C03 +#define id42C91D2875AE4E56BA61051619B58C03 + +#include +#include + +namespace duckcore { + class StringCRC32 { + struct FnvHashBase { + [[gnu::pure]] [[gnu::always_inline]] + static uint32_t Calculate ( const char parChar, uint32_t parCrc ); + }; + + //Update step: crc_32_tab[(crc ^ ch) & 0xff] ^ (crc >> 8) + template + struct FnvHash : private FnvHashBase { + [[gnu::always_inline]] + static uint32_t Calculate ( const char (&str)[N], uint32_t crc ) { + const uint32_t prevcrc = FnvHash::Calculate(str, crc); + return FnvHashBase::Calculate(str[I-1], prevcrc); + } + }; + template + struct FnvHash : private FnvHashBase { + [[gnu::always_inline]] + static uint32_t Calculate ( const char (&str)[N], uint32_t crc ) { + return FnvHashBase::Calculate(str[0], crc); + } + }; + + class ConstCharWrapper { + public: + ConstCharWrapper ( const char* parStr ) : str(parStr) { } + const char* const str; + }; + public: + + StringCRC32 ( ConstCharWrapper parStr ); + + template + [[gnu::always_inline]] + StringCRC32 ( const char (&str)[N] ) : + m_hash(~FnvHash::Calculate(str, 0xffffffff)) + { + } + + operator uint32_t ( void ) const { return m_hash; } + + private: + uint32_t m_hash; + + private: + //This is meant to represent a list of bits that are set to 1 + template + struct BitArray { + enum { value = N }; + typedef T Next; + }; + //Polynomial from zlib: {0,1,2,4,5,7,8,10,11,12,16,22,23,26} or 0xedb88320UL +// for (int poly = 0, n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++) +// poly |= (z_crc_t)1 << (31 - p[n]); + typedef BitArray<0, BitArray<1, BitArray<2, BitArray<4, BitArray<5, + BitArray<7, BitArray<8, BitArray<10, BitArray<11, BitArray<12, + BitArray<16, BitArray<22, BitArray<23, + BitArray<26, nullptr_t> > > > > > > > > > > > > > PolynomialBits; + template + struct MakePolynomial { + enum { value = (1 << (M - P::value)) bitor MakePolynomial::value }; + }; + template + struct MakePolynomial { + enum { value = 0 }; + }; + + //CRC32 algorithm from zlib: +// for (int n = 0; n < 256; n++) { +// c = n; +// for (k = 0; k < 8; k++) c = c & 1 ? poly ^ (c >> 1) : c >> 1; +// crc_table[n] = c; +// } + template (MakePolynomial::value)> + struct TableLookup { + static_assert(S > 1); + enum { + poly = P, + value = TableLookup::value, 1, poly>::value + }; + }; + template + struct TableLookup { + enum { + poly = P, + value = ((C & 1) == 1 ? poly ^ (static_cast(C) >> 1) : static_cast(C) >> 1) + }; + }; + }; + + inline uint32_t StringCRC32::FnvHashBase::Calculate (const char parChar, uint32_t parCrc) { + static const uint32_t crc_32_tab[256] = { /* CRC polynomial 0xedb88320 */ + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, + 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, + 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, + 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, + 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, + 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, + 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, + 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, + 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, + 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, + 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, + 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, + 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, + 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, + 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, + 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, + 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, + 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d + }; + return crc_32_tab[(parCrc ^ parChar) & 0xff] ^ (parCrc >> 8); + } +} //namespace duckcore + +#endif diff --git a/src/env_base.cpp b/src/env_base.cpp index c4d33fa..cf956ad 100644 --- a/src/env_base.cpp +++ b/src/env_base.cpp @@ -133,4 +133,16 @@ void EnvBase::clear_nolock (EnvBase& obj) noexcept { call_noexcept([&](){obj.clear_implem(m);}, to_string_view(__func__)); return; } + +void EnvBase::set_all_into (EnvBase& other) const { + const bool tg = this->is_global(); + const bool og = other.is_global(); + const uint32_t tc = this->class_identifier(); + const uint32_t oc = other.class_identifier(); + if ((tg and og and tc != oc) or + (not (tg and og) and this != &other) + ) { + this->set_all_into_implem(other); + } +} } //namespace duck diff --git a/src/env_base.hpp b/src/env_base.hpp index 9b96ac4..a5b5187 100644 --- a/src/env_base.hpp +++ b/src/env_base.hpp @@ -21,6 +21,7 @@ #include #include #include +#include namespace duck { class EnvBase; @@ -77,7 +78,7 @@ namespace duck { virtual std::mutex& mutex() const noexcept = 0; protected: - virtual void set_all_into (EnvBase& other) const = 0; + virtual void set_all_into_implem (EnvBase& other) const = 0; static void set_all_into (const EnvBase& obj, EnvBase& other) { obj.set_all_into(other); } virtual void clear_implem(Mutex& m) = 0; static void clear_nolock (EnvBase& obj) noexcept; @@ -90,6 +91,12 @@ namespace duck { virtual void unset_implem (std::string_view name, Mutex& m) = 0; virtual bool is_set_implem (std::string_view name, Mutex& m) const = 0; virtual size_type size_implem(Mutex& m) const = 0; + + virtual bool is_global() const noexcept = 0; + virtual uint32_t class_identifier() const noexcept = 0; + + private: + virtual void set_all_into (EnvBase& other) const; }; namespace detail { diff --git a/src/env_fake.cpp b/src/env_fake.cpp index 844d366..4e4389e 100644 --- a/src/env_fake.cpp +++ b/src/env_fake.cpp @@ -19,6 +19,7 @@ #include "to_var_map.hpp" #include "safe_print.hpp" #include "string_view_cat.hpp" +#include "StringCRC32.hpp" #include #include #include @@ -155,7 +156,7 @@ std::mutex& EnvFake::mutex() const noexcept { return m_mutex; } -void EnvFake::set_all_into (EnvBase& other) const { +void EnvFake::set_all_into_implem (EnvBase& other) const { std::scoped_lock lock(m_mutex, other.mutex()); EnvBase::clear_nolock(other); @@ -168,4 +169,8 @@ EnvFake& EnvFake::operator= (const EnvBase& other) { EnvBase::set_all_into(other, *this); return *this; } + +uint32_t EnvFake::class_identifier() const noexcept { + return duckcore::StringCRC32(__func__); +} } //namespace duck diff --git a/src/env_fake.hpp b/src/env_fake.hpp index ac33e7d..566f0f3 100644 --- a/src/env_fake.hpp +++ b/src/env_fake.hpp @@ -41,7 +41,7 @@ namespace duck { virtual std::mutex& mutex() const noexcept override; protected: - virtual void set_all_into (EnvBase& other) const override; + virtual void set_all_into_implem (EnvBase& other) const override; virtual void clear_implem(Mutex& m) override; virtual std::optional get_implem (std::string_view name, Mutex& m) const override; virtual std::string_view get_implem (std::string_view name, std::string_view def, Mutex& m) const override; @@ -50,6 +50,9 @@ namespace duck { virtual bool is_set_implem (std::string_view name, Mutex& m) const override; virtual size_type size_implem (Mutex& m) const override; + virtual bool is_global() const noexcept override { return false; } + virtual uint32_t class_identifier() const noexcept override; + private: std::unordered_map> m_map_strong_cpy; map_type m_map; diff --git a/src/env_real.cpp b/src/env_real.cpp index d3ce6d3..cccbf02 100644 --- a/src/env_real.cpp +++ b/src/env_real.cpp @@ -21,6 +21,7 @@ #include "env_real.hpp" #include "string_view_cat.hpp" #include "safe_print.hpp" +#include "StringCRC32.hpp" #include #include #include @@ -333,7 +334,7 @@ std::mutex& EnvReal::mutex() const noexcept { return pointer_map().env_mutex(); } -void EnvReal::set_all_into (EnvBase& other) const { +void EnvReal::set_all_into_implem (EnvBase& other) const { auto& pm = pointer_map(); std::scoped_lock lock(pm.env_mutex(), other.mutex()); @@ -342,4 +343,8 @@ void EnvReal::set_all_into (EnvBase& other) const { EnvBase::set_nolock(other, keyval.first, keyval.second); } } + +uint32_t EnvReal::class_identifier() const noexcept { + return duckcore::StringCRC32(__func__); +} } //namespace duck diff --git a/src/env_real.hpp b/src/env_real.hpp index f61e596..ceec3c5 100644 --- a/src/env_real.hpp +++ b/src/env_real.hpp @@ -62,7 +62,7 @@ namespace duck { virtual std::mutex& mutex() const noexcept override; protected: - virtual void set_all_into (EnvBase& other) const override; + virtual void set_all_into_implem (EnvBase& other) const override; virtual void clear_implem(Mutex& m) override; virtual std::optional get_implem (std::string_view name, Mutex& m) const override; virtual std::string_view get_implem (std::string_view name, std::string_view def, Mutex& m) const override; @@ -71,6 +71,9 @@ namespace duck { virtual bool is_set_implem (std::string_view name, Mutex& m) const override; virtual size_type size_implem(Mutex& m) const override; + virtual bool is_global() const noexcept override { return true; } + virtual uint32_t class_identifier() const noexcept override; + private: const char* raw_fetch_env (std::string_view name, Mutex& m) const noexcept;