init solver

headers/computorv1.h

@@ -66,7 +66,7 @@ typedef struct
     };
 } s_token;
 
-int lexerize(const char *input, s_token *tokens);
+void lexerize(const char *input, s_token *tokens);
 
 /** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * PARSER.C
@@ -94,7 +94,7 @@ typedef struct
     int exponent;
 } s_term;
 
-int parse(s_token *tokens, s_term *terms, int terms_count_max);
+void parse(s_token *tokens, s_term *terms, int terms_count_max);
 
 /** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * REDUCE.C
@@ -102,6 +102,35 @@ int parse(s_token *tokens, s_term *terms, int terms_count_max);
 
 void reduce(s_term *terms, double *polynom);
 
+/** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * SOLVE.C
+ */
+
+typedef enum
+{
+    DELTA_PLUS,  // +
+    DELTA_MINUS, // -
+    DELTA_ZERO,  // 0
+} e_delta_sign;
+
+typedef struct
+{
+    e_delta_sign delta_sign;     // DELTA_PLUS or DELTA_MINUS or DELTA_ZERO
+    double delta_absolute;       // |Δ| == |b² - 4ac|
+    int first_term_pgcd;         // pgcd(b, 2a)
+    int first_term_numerator;    // -b / pgcd
+    int first_term_denominator;  // 2a / pgcd
+    double first_term;           // double (-b / 2a)
+    int second_term_pgcd;        // pgcd(√|Δ|, 2a)
+    int second_term_numerator;   // √|Δ| / pgcd
+    int second_term_denominator; // 2a / pgcd
+    double second_term;          // double (√|Δ| / 2a)
+    double solution1;            // first_term + second_term
+    double solution2;            // first_term - second_term
+} s_solution;
+
+void solve(const double *polynom, s_solution *solution);
+
 /** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * UTILS/ERRORS.C
  */
@@ -117,6 +146,7 @@ const char *token_type_to_str(e_token_type type);
 const char *token_tag_to_str(e_token_tag tag);
 const char *term_position_to_str(e_term_position pos);
 const char *term_sign_to_str(e_term_sign sign);
+const char *delta_sign_to_str(e_delta_sign sign);
 
 /** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * UTILS/PRINTER.C
@@ -135,5 +165,6 @@ extern double *polynom_g_err;
 extern int polynom_len_g_err;
 extern bool flag_debug_mode;
 extern bool flag_loop_mode;
+extern s_solution *solution_g_err;
 
 #endif