using double everywhere

headers/errors.h

@@ -8,8 +8,9 @@ typedef enum
     ERROR_BASIC = 0,
     ERROR_UNKNOWN_TOKEN = -1,
     ERROR_NUMBER_TOO_BIG = -2,
+    ERROR_PARSING = -3,
 } program_error;
 
-int stop_errors(int err);
+int stop_errors(int err, char *details);
 
 #endif

headers/lexer.h

@@ -7,14 +7,13 @@
 
 typedef enum
 {
-    TOKEN_VARIABLE,      // x, y, etc.
-    TOKEN_NUMBER_INT,    // int
-    TOKEN_NUMBER_DOUBLE, // double
-    TOKEN_POWER,         // ^ or **
-    TOKEN_SIGN,          // + or -
-    TOKEN_FACTOR,        // * or /
-    TOKEN_EQUAL,         // =
-    TOKEN_END            // null (end of input)
+    TOKEN_VARIABLE, // x, y, etc.
+    TOKEN_NUMBER,   // int or double -> all converted into double
+    TOKEN_POWER,    // ^ or **
+    TOKEN_SIGN,     // + or -
+    TOKEN_FACTOR,   // * or /
+    TOKEN_EQUAL,    // =
+    TOKEN_END       // null (end of input)
 } token_type;
 
 typedef struct
@@ -23,7 +22,6 @@ typedef struct
     union
     {
         char value_char;
-        int value_int;
         double value_double;
     };
 } token;

headers/parser.h

@@ -18,25 +18,14 @@ typedef enum
     TERM_MINUS, // -
 } term_sign;
 
-typedef enum
-{
-    TYPE_INT,    // "123"
-    TYPE_DOUBLE, // "123.456"
-} coefficient_type;
-
 typedef struct
 {
     term_position position;
     term_sign sign;
-    coefficient_type coefficient_type;
-    union
-    {
-        int coefficient_int;
-        double coefficient_double;
-    };
+    double coefficient;
     int exponent;
 } term;
 
-int parse(token *tokens, term *terms);
+int parse(token *tokens, term *terms, int terms_count_max);
 
 #endif