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include/core.h

@@ -0,0 +1,16 @@
+#ifndef CORE_H
+#define CORE_H
+
+__extension__ typedef __int128 int128_t;
+__extension__ typedef unsigned __int128 uint128_t;
+
+// Read 128 bit integers as string
+int read_int128_triplet(const char* prompt, int128_t* a, int128_t* b, int128_t* c);
+
+// Convert the read string into 128 bit integers
+int128_t str_to_int128(const char* s);
+
+// Print 128 but integers
+void print_int128(int128_t n);
+
+#endif

include/maths.h

@@ -0,0 +1,28 @@
+#ifndef MATHS_H
+#define MATHS_H
+
+#include "core.h"
+
+// Check if a 128 bit integer is a prime number or not
+int is_prime(int128_t n);
+
+// Calculate the GCD for 3 128 bit integers
+int128_t gcd3(int128_t a, int128_t b, int128_t c);
+
+// Calculate the GCD for 2 128 bit integers
+int128_t gcd2(int128_t a, int128_t b);
+
+// Return the absolute value of a 128 bit integer
+int128_t abs128(int128_t x);
+
+// Raise a number a certain exponent
+int128_t power(int128_t b, int128_t ex);
+
+// Generate the factor pairs
+void generate_factor_pairs(int128_t* sum, int prime_index, int* exponents,
+			int128_t* values, int128_t n1, int print_mode);
+
+// Calculate the square root of an unsigned 128 bit integer
+uint128_t mysqrt_uint128(uint128_t number);
+
+#endif