Update README.md

Author: devatrun

README.md

@@ -7,17 +7,29 @@ The main features:
 * speed: use intrinsics if supported
 * cross-platform: supports MSVC, GCC and CLANG C++17 compilers
 
-Library implements two main classes:
+The library implements two main classes:
 ```c++
+namespace slim
+{
 template<typename native_t = uintmax_t, uint_t size = 2>
 class long_uint_t; // unsigned integer
 template<typename native_t = uintmax_t, uint_t size = 2>
 class long_int_t;  // signed integer
+
+} // namespace slim
 ```
 where native_t may be one of base unsigned type and size must by power of two.
+## Implementation
+[long_int.h](include/long_int.h) - long signed integer class
+[long_uint.h](include/long_uint.h) - long unsigned integer class
+[long_math.h](include/long_math.h) - crossplatform helper classes and functions 
+[long_math_gcc.h](include/long_math_gcc.h) - GCC, CLANG helper classes and functions 
+[long_math_gcc.h](include/long_math_msvc.h) - MSVC helper classes and functions 
 ## Integration
-Library implements four predefined types: uint128_t, uint256_t, int128_t, int256_t. You can use them in you project by include code below:
+The library implements four predefined types: uint128_t, uint256_t, int128_t, int256_t. You can use them in you project by include code below:
 ```c++
+#include <slimcpplib/long_uint.h>
+// or
 #include <slimcpplib/long_int.h>
 
 namespace your_namespace
@@ -32,29 +44,36 @@ namespace your_namespace
 ```
 ## Constant declaration:
 ```c++
-constexpr auto uo = 03766713523035452062041773345651416625031020_ui128;     // octal unsigned integer
-constexpr auto ud = 338770000845734292534325025077361652240_ui128;          // decimal unsigned integer
-constexpr auto uh = 0xfedcba9876543210fedcba9876543210_ui128;               // hexadecimal unsigned integer
+constexpr auto uo = 03766713523035452062041773345651416625031020_ui128;  // octal unsigned integer
+constexpr auto ud = 338770000845734292534325025077361652240_ui128;       // decimal unsigned integer
+constexpr auto uh = 0xfedcba9876543210fedcba9876543210_ui128;            // hexadecimal unsigned integer
 
-constexpr auto io = -03766713523035452062041773345651416625031020_si128;    // octal signed integer
-constexpr auto id = -338770000845734292534325025077361652240_si128;         // decimal signed integer
-constexpr auto ih = -0xfedcba9876543210fedcba9876543210_si128;              // hexadecimal signed integer
+constexpr auto io = -03766713523035452062041773345651416625031020_si128; // octal signed integer
+constexpr auto id = -338770000845734292534325025077361652240_si128;      // decimal signed integer
+constexpr auto ih = -0xfedcba9876543210fedcba9876543210_si128;           // hexadecimal signed integer
 ```
 also supported (') separator for integer literals:
 ```c++
-constexpr auto u = 0xfedcba98'76543210'fedcba98'76543210_ui128;            // hexadecimal unsigned integer
+constexpr auto u = 0xfedcba98'76543210'fedcba98'76543210_ui128;          // hexadecimal unsigned integer
 ```
 ## Construction:
 ```c++
-const uint128_t u;                  // construct uninitialized unsigned integer
-const uint128_t u = 1U;             // construction from unsigned integer
-const int128_t  s = -1;             // construction from signed integer
-const uint128_t u = 10000_ui128;    // construction from long unsigned integer
-const int128_t  u = -10000_i128;    // construction from long signed integer
-const uint128_t u = true;           // construction from boolean value
+const uint128_t u;               // construct uninitialized unsigned integer
+const uint128_t u = 1U;          // construction from unsigned integer
+const int128_t  s = -1;          // construction from signed integer
+const uint128_t u = 10000_ui128; // construction from long unsigned integer
+const int128_t  u = -10000_i128; // construction from long signed integer
+const uint128_t u = true;        // construction from boolean value
 ```
 ## Operators
 long_uint_t type supports following operators:
-==, !=, <, <=, >, >=, <<=, <<, >>=, >>, +=, +, ++, -=, -, --, *=, *, /=, /, %=, %, ~, &=, &, |=, |, ^=, ^
+` ==, !=, <, <=, >, >=, <<=, <<, >>=, >>, +=, +, ++, -=, -, --, *=, *, /=, /, %=, %, ~, &=, &, |=, |, ^=, ^`
 long_int_t type supports following operators:
-==, !=, <, <=, >, >=, <<=, <<, >>=, >>, +=, +, ++, -=, -, --, *=, *, /=, /, %=, %
+`==, !=, <, <=, >, >=, <<=, <<, >>=, >>, +=, +, ++, -=, -, --, *=, *, /=, /, %=, %`
+## MulDiv
+The library implements the muldiv method for faster calculation of the following expressions: (A * B / C). It can be used with signed and unsigned integers.
+```c++
+template<typename type_t>
+constexpr type_t muldiv(const type_t& value, const type_t& multiplier, const type_t& divider) noexcept;
+```
+## Restrictions