tinyexpr.h File Reference

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Classes
struct	te_expr
struct	te_variable

Typedefs
typedef struct te_expr	te_expr
typedef struct te_variable	te_variable

Enumerations
enum	{   TE_VARIABLE = 0 , TE_FUNCTION0 = 8 , TE_FUNCTION1 , TE_FUNCTION2 ,   TE_FUNCTION3 , TE_FUNCTION4 , TE_FUNCTION5 , TE_FUNCTION6 ,   TE_FUNCTION7 , TE_CLOSURE0 = 16 , TE_CLOSURE1 , TE_CLOSURE2 ,   TE_CLOSURE3 , TE_CLOSURE4 , TE_CLOSURE5 , TE_CLOSURE6 ,   TE_CLOSURE7 , TE_FLAG_PURE = 32 }

Functions
double	te_interp (const char *expression, int *error)
te_expr *	te_compile (const char *expression, const te_variable *variables, int var_count, int *error)
double	te_eval (const te_expr *n)
void	te_print (const te_expr *n)
void	te_free (te_expr *n)

Typedef Documentation

te_expr

typedef struct te_expr te_expr

te_variable

typedef struct te_variable te_variable

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
TE_VARIABLE
TE_FUNCTION0
TE_FUNCTION1
TE_FUNCTION2
TE_FUNCTION3
TE_FUNCTION4
TE_FUNCTION5
TE_FUNCTION6
TE_FUNCTION7
TE_CLOSURE0
TE_CLOSURE1
TE_CLOSURE2
TE_CLOSURE3
TE_CLOSURE4
TE_CLOSURE5
TE_CLOSURE6
TE_CLOSURE7
TE_FLAG_PURE

Definition at line 43 of file tinyexpr.h.

     {
   TE_VARIABLE = 0,
 
   TE_FUNCTION0 = 8,
   TE_FUNCTION1,
   TE_FUNCTION2,
   TE_FUNCTION3,
   TE_FUNCTION4,
   TE_FUNCTION5,
   TE_FUNCTION6,
   TE_FUNCTION7,
 
   TE_CLOSURE0 = 16,
   TE_CLOSURE1,
   TE_CLOSURE2,
   TE_CLOSURE3,
   TE_CLOSURE4,
   TE_CLOSURE5,
   TE_CLOSURE6,
   TE_CLOSURE7,
 
   TE_FLAG_PURE = 32
};

Function Documentation

te_compile()

te_expr * te_compile	(	const char *	expression,
		const te_variable *	variables,
		int	var_count,
		int *	error
	)

Definition at line 665 of file tinyexpr.c.

                                                                                                     {
   state s;
   s.start = s.next = expression;
   s.lookup = variables;
   s.lookup_len = var_count;
 
   next_token(&s);
   te_expr *root = list(&s);
 
   if (s.type != TOK_END) {
      te_free(root);
      if (error) {
         *error = (s.next - s.start);
         if (*error == 0)
            *error = 1;
      }
      return 0;
   } else {
      optimize(root);
      if (error)
         *error = 0;
      return root;
   }
}

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te_eval()

double te_eval

(

const te_expr *

n

)

Definition at line 583 of file tinyexpr.c.

                                 {
   if (!n)
      return NAN;
 
   switch (TYPE_MASK(n->type)) {
      case TE_CONSTANT: return n->value;
      case TE_VARIABLE: return *n->bound;
 
      case TE_FUNCTION0:
      case TE_FUNCTION1:
      case TE_FUNCTION2:
      case TE_FUNCTION3:
      case TE_FUNCTION4:
      case TE_FUNCTION5:
      case TE_FUNCTION6:
      case TE_FUNCTION7:
         switch (ARITY(n->type)) {
            case 0: return TE_FUN(void)();
            case 1: return TE_FUN(double)(M(0));
            case 2: return TE_FUN(double, double)(M(0), M(1));
            case 3: return TE_FUN(double, double, double)(M(0), M(1), M(2));
            case 4: return TE_FUN(double, double, double, double)(M(0), M(1), M(2), M(3));
            case 5: return TE_FUN(double, double, double, double, double)(M(0), M(1), M(2), M(3), M(4));
            case 6: return TE_FUN(double, double, double, double, double, double)(M(0), M(1), M(2), M(3), M(4), M(5));
            case 7: return TE_FUN(double, double, double, double, double, double, double)(M(0), M(1), M(2), M(3), M(4), M(5), M(6));
            default: return NAN;
         }
 
      case TE_CLOSURE0:
      case TE_CLOSURE1:
      case TE_CLOSURE2:
      case TE_CLOSURE3:
      case TE_CLOSURE4:
      case TE_CLOSURE5:
      case TE_CLOSURE6:
      case TE_CLOSURE7:
         switch (ARITY(n->type)) {
            case 0: return TE_FUN(void *)(n->parameters[0]);
            case 1: return TE_FUN(void *, double)(n->parameters[1], M(0));
            case 2: return TE_FUN(void *, double, double)(n->parameters[2], M(0), M(1));
            case 3: return TE_FUN(void *, double, double, double)(n->parameters[3], M(0), M(1), M(2));
            case 4: return TE_FUN(void *, double, double, double, double)(n->parameters[4], M(0), M(1), M(2), M(3));
            case 5: return TE_FUN(void *, double, double, double, double, double)(n->parameters[5], M(0), M(1), M(2), M(3), M(4));
            case 6: return TE_FUN(void *, double, double, double, double, double, double)(n->parameters[6], M(0), M(1), M(2), M(3), M(4), M(5));
            case 7: return TE_FUN(void *, double, double, double, double, double, double, double)(n->parameters[7], M(0), M(1), M(2), M(3), M(4), M(5), M(6));
            default: return NAN;
         }
 
      default: return NAN;
   }
}

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te_free()

void te_free

(

te_expr *

n

)

Definition at line 128 of file tinyexpr.c.

                         {
   if (!n)
      return;
   te_free_parameters(n);
   free(n);
}

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te_interp()

double te_interp	(	const char *	expression,
		int *	error
	)

Definition at line 690 of file tinyexpr.c.

                                                     {
   te_expr *n = te_compile(expression, 0, 0, error);
   double ret;
   if (n) {
      ret = te_eval(n);
      te_free(n);
   } else {
      ret = NAN;
   }
   return ret;
}

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te_print()

void te_print

(

const te_expr *

n

)

Definition at line 739 of file tinyexpr.c.

                                {
   pn(n, 0);
}

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