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expr.c
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expr.c
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/*
* Project name:
* Implementace interpretu imperativního jazyka IFJ14
*
* Repository:
* https://github.com/Dasio/IFJ
*
* Team:
* Dávid Mikuš (xmikus15)
* Peter Hostačný (xhosta03)
* Tomáš Kello (xkello00)
* Adam Lučanský (xlucan01)
* Michaela Lukášová (xlukas09)
*/
#include "expr.h"
//extern void *mem_alloc(size_t len);
extern Token *token;
extern TokenVector *tokenVector;
extern Context *mainContext;
extern Context *funcContext;
extern Context *activeContext;
extern Symbol *funcSymbol;
extern InstructionVector *tape;
static ExprToken temp_expr_token;
static DataType return_value_data_type;
static ExprToken *top_most_term;
static Operand a, b, c;
int64_t MY_OFFSET;
int instr_counter;
static void reduce(ExprTokenVector *expr_vector);
static inline void reduce_handle_unary_minus(THandle handle);
static inline void reduce_handle_not(THandle handle);
static inline void reduce_handle_three_tokens(THandle handle);
static void reduce_two_constants(THandle handle);
static inline void reduce_handle_function(THandle handle);
static void convert_to_ExprToken(Token *token, ExprTokenVector *expr_vector);
static inline int token_to_index(Token *token);
static inline int precedence(ExprTokenVector *expr_token_vector);
static inline void find_top_most_term(ExprTokenVector *expr_token_vector);
static inline int index_handle_start(ExprTokenVector *expr_token_vector);
static inline bool check_id_function(Symbol *identifier);
static inline bool check_unary_minus(ExprTokenVector *expr_vector);
void ExprTokenVectorPrint(ExprTokenVector *expr_token);
void ExprTokenPrint(ExprToken *expr_token);
typedef enum
{
S, // shift
R, // reduce
H, // handle
E // error
} TokenPrecedence;
enum { SHIFT = S, REDUCE = R, HANDLE = H, ERROR = E};
static const int precedence_table[TT_assignment][TT_assignment] =
{
/* U- not * / and + - or xor < > <= >= = <> ( ) f , $ var */
/* U- */{ H , R , R , R , R , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* not */{ R , H , R , R , R , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* * */{ S , S , R , R , R , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* / */{ S , S , R , R , R , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* and */{ S , S , R , R , R , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* + */{ S , S , S , S , S , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* - */{ S , S , S , S , S , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* or */{ S , S , S , S , S , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* xor */{ S , S , S , S , S , R , R , R , R , R , R , R , R , R , R , S , R , S , R , R , S },
/* < */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* > */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* <= */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* >= */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* = */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* <> */{ S , S , S , S , S , S , S , S , S , R , R , R , R , R , R , S , R , S , R , R , S },
/* ( */{ S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , H , S , H , E , S },
/* ) */{ R , R , R , R , R , R , R , R , R , R , R , R , R , R , R , E , R , E , R , R , E },
/* f */{ E , E , E , E , E , E , E , E , E , E , E , E , E , E , E , H , E , E , E , E , E },
/* , */{ S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , H , S , H , E , S },
/* $ */{ S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , S , E , S , E , E , S },
/* var */{ R , R , R , R , R , R , R , R , R , R , R , R , R , R , R , E , R , E , R , R , E }
};
#define OPERATORS_COUNT 15
#define num_of_data_types 4
static const int type_table[OPERATORS_COUNT][num_of_data_types][num_of_data_types] =
{
{
/*****************************************************/
/* TT_unaryMinus */
/*****************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ DOUBLE , DOUBLE , DOUBLE , DOUBLE },
/* INT */{ INT , INT , INT , INT },
/* BOOL */{ UNDEF , UNDEF , UNDEF , UNDEF }
},
{
/*****************************************************/
/* TT_not */
/*****************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* BOOL */{ BOOL , BOOL , BOOL , BOOL }
},
{
/***************************************************************/
/* TT_multiply * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , DOUBLE , DOUBLE , UNDEF },
/* INT */{ UNDEF , DOUBLE , INT , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , UNDEF }
},
{
/***************************************************************/
/* TT_division * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , DOUBLE , DOUBLE , UNDEF },
/* INT */{ UNDEF , DOUBLE , DOUBLE , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , UNDEF }
},
{
/***************************************************************/
/* TT_and * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/***************************************************************/
/* TT_plus * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ STRING , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , DOUBLE , DOUBLE , UNDEF },
/* INT */{ UNDEF , DOUBLE , INT , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , UNDEF }
},
{
/***************************************************************/
/* TT_minus * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , DOUBLE , DOUBLE , UNDEF },
/* INT */{ UNDEF , DOUBLE , INT , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , UNDEF }
},
{
/***************************************************************/
/* TT_or * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/***************************************************************/
/* TT_xor * STRING DOUBLE INT BOOL ***/
/***************************************************************/
/* STRING */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , UNDEF , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_less * STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_greater * STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_lessOrEqual * STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_greaterOrEqual* STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_equality * STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
{
/************************************************************/
/* TT_inequality * STRING DOUBLE INT BOOL ***/
/************************************************************/
/* STRING */{ BOOL , UNDEF , UNDEF , UNDEF },
/* DOUBLE */{ UNDEF , BOOL , UNDEF , UNDEF },
/* INT */{ UNDEF , UNDEF , BOOL , UNDEF },
/* BOOL */{ UNDEF , UNDEF , UNDEF , BOOL }
},
};
DataType expr()
{
int action;
instr_counter = 0;
bool end_of_eval = true;
return_value_data_type = EXPR_ERROR;
assert(activeContext);
if (activeContext == mainContext)
MY_OFFSET = activeContext->locCount + 1;
else
MY_OFFSET = activeContext->locCount + 2;
token++;
if(token->type != TT_leftBrace && token->type != TT_not && token->type != TT_minus
&& !(token->type >= TT_identifier && token->type <= TT_bool))
{
setError(ERR_SyntaxExpr);
return EXPR_ERROR;
}
ExprTokenVector *expr_token_vector = ExprTokenVectorInit(32);
assert(tokenVector);
convert_to_ExprToken(TokenVectorLast(tokenVector), expr_token_vector); // add $ to expr. stack
ExprTokenVectorAppend(expr_token_vector, temp_expr_token); // first token, (empty = $)
// [$, , , , , ]
while (end_of_eval)
{
convert_to_ExprToken(token, expr_token_vector);
if(getError())
{
ExprTokenVectorFree(expr_token_vector);
return EXPR_ERROR;
}
AFTER_REDUCE:
action = precedence(expr_token_vector);
/* vypisy */
//static const char *actions[] = {"shift", "reduce", "handle", "error"};
//ExprTokenVectorPrint(expr_token_vector);
//fprintf(stderr, " %s\n", actions[action]);
switch(action)
{
case ERROR:
if (top_most_term->token->type == TT_empty &&
token_to_index(temp_expr_token.token) == TT_empty &&
expr_token_vector->used != 3)
{
end_of_eval = false;
break;
}
setError(ERR_PrecedenceTable);
ExprTokenVectorFree(expr_token_vector);
return EXPR_ERROR;
case SHIFT:
ExprTokenVectorAppend(expr_token_vector, temp_expr_token);
if (top_most_term != ExprTokenVectorLast(expr_token_vector))
top_most_term[1].handle_start = true;
break;
case HANDLE:
ExprTokenVectorAppend(expr_token_vector, temp_expr_token);
break;
case REDUCE:
reduce(expr_token_vector);
if(getError())
{
ExprTokenVectorFree(expr_token_vector);
return EXPR_ERROR;
}
goto AFTER_REDUCE;
break;
}
if (token_to_index(token) != TT_empty)
token++;
}
/*for (int i = TT_unaryMinus; i <= TT_inequality; i++)
{
printf("%d\n", i);
print_type_table(i);
}*/
Instruction *last = InstructionVectorLast(tape);
if (instr_counter == 0)
{
b = (++top_most_term)->E;
b.initialized = true;
a.offset = MY_OFFSET++;
//fprintf(stderr,"EXPR_PUSH a.offset = %ld b.var_type = %d b.offset= %ld b.data_type= %d\n",a.offset,b.var_type,b.offset,b.data_type);
generateInstruction(PUSH, &a, &b, &c); // b = pushed operand, a = local dst
}
else if (last->instr == Instr_CALL)
{
b.var_type = LOCAL;
b.data_type = return_value_data_type;
b.offset = MY_OFFSET - 1;
a.offset = MY_OFFSET - 1;
generateInstruction(PUSH, &a, &b, &c); // b = pushed operand, a = local dst
}
ExprTokenVectorFree(expr_token_vector);
return return_value_data_type;
}
static void reduce(ExprTokenVector *expr_vector)
{
assert(expr_vector); // just in case
THandle handle = {.expr_vector = expr_vector};
handle.last = ExprTokenVectorLast(expr_vector);
if (handle.last->handle_start) //////// 1 token
{
if (handle.last->type == TERM) // E -> var
{
return_value_data_type = handle.last->E.data_type;
handle.last->handle_start = false;
handle.last->type = NONTERM;
}
else
{
setError(ERR_Reduction);
return;
}
}
else
{
handle.first_index = index_handle_start(expr_vector);
if(getError()) return;
handle.last_index = expr_vector->used - 1;
handle.tokens_count = handle.last_index - handle.first_index + 1;
handle.first = ExprTokenVectorAt(expr_vector, handle.first_index);
if (handle.first->token->type == TT_unaryMinus && handle.last->type == NONTERM) // 2+ tokens
{ // TT_not or TT_unaryMinux (maybe multiple times)
reduce_handle_unary_minus(handle);
}
else if (handle.first->token->type == TT_not && handle.last->type == NONTERM) // 2+ tokens
{
reduce_handle_not(handle);
}
else if (handle.first->type != NONTERM && handle.first->token->type == TT_function) // 3, 4, 6, 8 .. tokens
{
reduce_handle_function(handle);
}
else if (handle.tokens_count == 3) //// 3 tokens... E + E ... ( E )
{
reduce_handle_three_tokens(handle);
}
else
{
//ExprTokenVectorPrint(expr_vector);
/*
fprintf(stderr, "%d\n", handle.tokens_count);
fprintf(stderr, "%s", stringifyToken(top_most_term->token));
fprintf(stderr, " _%d\n", top_most_term->token->type);
fprintf(stderr, "%s", stringifyToken(temp_expr_token.token));
fprintf(stderr, " _%d\n", temp_expr_token.token->type);
*/
setError(ERR_Reduction);
return;
}
if(getError()) return;
}
return;
}
// 2+ tokens
static inline void reduce_handle_unary_minus(THandle handle)
{
int minus_counter = 0;
ExprToken *temp = handle.first;
while (temp->token->type == TT_unaryMinus)
{
minus_counter++;
temp++;
}
if (temp != handle.last)
{
setError(ERR_Reduction);
return;
}
if (temp->E.data_type != INT && temp->E.data_type != DOUBLE) // check data_type
{
setError(ERR_TypeCompatibility);
return;
}
else
return_value_data_type = temp->E.data_type;
if (minus_counter % 2 == 0)
{
// reducing tokens
ExprTokenVectorAtSet(handle.expr_vector, handle.first_index, *temp);
ExprTokenVectorPopMore(handle.expr_vector, handle.tokens_count - 1);
}
else // if (minus_counter % 2 == 1)
{
if (temp->E.var_type == CONST)
{
if (temp->E.data_type == INT)
temp->E.int_ = - temp->E.int_;
else if (temp->E.data_type == DOUBLE)
temp->E.double_ = - temp->E.double_;
}
else // LOCAL / GLOBAL
{
b = temp->E;
a.offset = MY_OFFSET++;
generateExprInstruction(NEG, &a, &b, &c);
temp->E.var_type = LOCAL;
temp->E.offset = MY_OFFSET-1;
}
// reducing tokens
ExprTokenVectorAtSet(handle.expr_vector, handle.first_index, *temp);
ExprTokenVectorPopMore(handle.expr_vector, handle.tokens_count - 1);
}
}
// 2+ tokens
static inline void reduce_handle_not(THandle handle)
{
int not_counter = 0;
ExprToken *temp = handle.first;
while (temp->token->type == TT_not)
{
not_counter++;
temp++;
}
if (temp != handle.last)
{
setError(ERR_Reduction);
return;
}
if (temp->E.data_type != BOOL) // check data_type
{
setError(ERR_TypeCompatibility);
return;
}
else
return_value_data_type = BOOL;
if (not_counter % 2 == 0)
{
// reducing tokens
ExprTokenVectorAtSet(handle.expr_vector, handle.first_index, *temp);
ExprTokenVectorPopMore(handle.expr_vector, handle.tokens_count - 1);
}
else // if (not_counter % 2 == 1)
{
if (temp->E.var_type == CONST && temp->E.data_type == BOOL)
temp->E.bool_ = ! temp->E.bool_;
else // LOCAL / GLOBAL
{
b = temp->E;
a.offset = MY_OFFSET++;
generateExprInstruction(NOT, &a, &b, &c);
temp->E.var_type = LOCAL;
temp->E.offset = MY_OFFSET-1;
}
// reducing tokens
ExprTokenVectorAtSet(handle.expr_vector, handle.first_index, *temp);
ExprTokenVectorPopMore(handle.expr_vector, handle.tokens_count - 1);
}
}
// 3 tokens... E + E ... ( E )
static inline void reduce_handle_three_tokens(THandle handle)
{
/*** ( E ) -> E ***/
if (handle.first[0].token->type == TT_leftBrace &&
handle.first[1].type == NONTERM &&
handle.first[2].token->type == TT_rightBrace)
{
ExprTokenVectorAtSet(handle.expr_vector, handle.first_index, handle.first[1]);
ExprTokenVectorPopMore(handle.expr_vector, 2);
return_value_data_type = handle.first->E.data_type;
}
else if (handle.first[0].type == NONTERM &&
handle.first[1].token->type >= TT_multiply &&
handle.first[1].token->type <= TT_inequality &&
handle.first[2].type == NONTERM)
{
// semantic analysis
DataType value_type = type_table[handle.first[1].token->type]
[handle.first[0].E.data_type]
[handle.first[2].E.data_type];
if (value_type == UNDEF)
{
setError(ERR_TypeCompatibility);
return;
}
else
return_value_data_type = value_type;
// check if both operands are constants and do operation without generating instruction
if (handle.first[0].E.var_type == CONST &&
handle.first[2].E.var_type == CONST)
{
reduce_two_constants(handle);
if(getError()) return;
// reducing tokens
ExprTokenVectorPopMore(handle.expr_vector, 2);
}
else // generating instruction
{
b = handle.first[0].E;
c = handle.first[2].E;
a.offset = MY_OFFSET++;
generateExprInstruction((InstructionOp)handle.first[1].token->type, &a, &b, &c);
// reducing tokens
handle.first->E.var_type = LOCAL;
handle.first->E.offset = MY_OFFSET-1;
ExprTokenVectorPopMore(handle.expr_vector, 2);
}
handle.first->handle_start = false;
handle.first->E.data_type = value_type;
}
else
{
setError(ERR_Reduction);
return;
}
}
static void reduce_two_constants(THandle handle)
{
if (handle.first[0].E.data_type == INT &&
handle.first[2].E.data_type == INT)
{
switch (handle.first[1].token->type)
{
case TT_multiply:
handle.first[0].E.int_ = handle.first[0].E.int_ * handle.first[2].E.int_;
break;
case TT_division:
if (handle.first[2].E.int_ == 0)
{
setError(ERR_DivisionByZero);
return;
}
handle.first[0].E.double_ = (double)handle.first[0].E.int_ / handle.first[2].E.int_;
break;
case TT_plus:
handle.first[0].E.int_ = handle.first[0].E.int_ + handle.first[2].E.int_;
break;
case TT_minus:
handle.first[0].E.int_ = handle.first[0].E.int_ - handle.first[2].E.int_;
break;
case TT_less:
handle.first[0].E.bool_ = handle.first[0].E.int_ < handle.first[2].E.int_;
break;
case TT_greater:
handle.first[0].E.bool_ = handle.first[0].E.int_ > handle.first[2].E.int_;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.int_ <= handle.first[2].E.int_;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.int_ >= handle.first[2].E.int_;
break;
case TT_equality:
handle.first[0].E.bool_ = handle.first[0].E.int_ == handle.first[2].E.int_;
break;
case TT_inequality:
handle.first[0].E.bool_ = handle.first[0].E.int_ != handle.first[2].E.int_;
break;
default:
break;
}
}
else if (handle.first[0].E.data_type == INT &&
handle.first[2].E.data_type == DOUBLE)
{
switch (handle.first[1].token->type)
{
case TT_multiply:
handle.first[0].E.double_ = handle.first[0].E.int_ * handle.first[2].E.double_;
break;
case TT_division:
if (handle.first[2].E.double_ == 0)
{
setError(ERR_DivisionByZero);
return;
}
handle.first[0].E.double_ = handle.first[0].E.int_ / handle.first[2].E.double_;
break;
case TT_plus:
handle.first[0].E.double_ = handle.first[0].E.int_ + handle.first[2].E.double_;
break;
case TT_minus:
handle.first[0].E.double_ = handle.first[0].E.int_ - handle.first[2].E.double_;
break;
case TT_less:
handle.first[0].E.bool_ = handle.first[0].E.int_ < handle.first[2].E.double_;
break;
case TT_greater:
handle.first[0].E.bool_ = handle.first[0].E.int_ > handle.first[2].E.double_;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.int_ <= handle.first[2].E.double_;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.int_ >= handle.first[2].E.double_;
break;
case TT_equality:
handle.first[0].E.bool_ = handle.first[0].E.int_ == handle.first[2].E.double_;
break;
case TT_inequality:
handle.first[0].E.bool_ = handle.first[0].E.int_ != handle.first[2].E.double_;
break;
default:
break;
}
}
else if (handle.first[0].E.data_type == DOUBLE &&
handle.first[2].E.data_type == INT)
{
switch (handle.first[1].token->type)
{
case TT_multiply:
handle.first[0].E.double_ = handle.first[0].E.double_ * handle.first[2].E.int_;
break;
case TT_division:
if (handle.first[2].E.int_ == 0)
{
setError(ERR_DivisionByZero);
return;
}
handle.first[0].E.double_ = handle.first[0].E.double_ / handle.first[2].E.int_;
break;
case TT_plus:
handle.first[0].E.double_ = handle.first[0].E.double_ + handle.first[2].E.int_;
break;
case TT_minus:
handle.first[0].E.double_ = handle.first[0].E.double_ - handle.first[2].E.int_;
break;
case TT_less:
handle.first[0].E.bool_ = handle.first[0].E.double_ < handle.first[2].E.int_;
break;
case TT_greater:
handle.first[0].E.bool_ = handle.first[0].E.double_ > handle.first[2].E.int_;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.double_ <= handle.first[2].E.int_;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.double_ >= handle.first[2].E.int_;
break;
case TT_equality:
handle.first[0].E.bool_ = handle.first[0].E.double_ == handle.first[2].E.int_;
break;
case TT_inequality:
handle.first[0].E.bool_ = handle.first[0].E.double_ != handle.first[2].E.int_;
break;
default:
break;
}
}
else if (handle.first[0].E.data_type == DOUBLE &&
handle.first[2].E.data_type == DOUBLE)
{
switch (handle.first[1].token->type)
{
case TT_multiply:
handle.first[0].E.double_ = handle.first[0].E.double_ * handle.first[2].E.double_;
break;
case TT_division:
if (handle.first[2].E.double_ == 0)
{
setError(ERR_DivisionByZero);
return;
}
handle.first[0].E.double_ = handle.first[0].E.double_ / handle.first[2].E.double_;
break;
case TT_plus:
handle.first[0].E.double_ = handle.first[0].E.double_ + handle.first[2].E.double_;
break;
case TT_minus:
handle.first[0].E.double_ = handle.first[0].E.double_ - handle.first[2].E.double_;
break;
case TT_less:
handle.first[0].E.bool_ = handle.first[0].E.double_ < handle.first[2].E.double_;
break;
case TT_greater:
handle.first[0].E.bool_ = handle.first[0].E.double_ > handle.first[2].E.double_;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.double_ <= handle.first[2].E.double_;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.double_ >= handle.first[2].E.double_;
break;
case TT_equality:
handle.first[0].E.bool_ = handle.first[0].E.double_ == handle.first[2].E.double_;
break;
case TT_inequality:
handle.first[0].E.bool_ = handle.first[0].E.double_ != handle.first[2].E.double_;
break;
default:
break;
}
}
else if (handle.first[0].E.data_type == BOOL &&
handle.first[2].E.data_type == BOOL)
{
switch (handle.first[1].token->type)
{
case TT_and:
handle.first[0].E.bool_ = handle.first[0].E.bool_ && handle.first[2].E.bool_;
break;
case TT_or:
handle.first[0].E.bool_ = handle.first[0].E.bool_ || handle.first[2].E.bool_;
break;
case TT_xor:
handle.first[0].E.bool_ = handle.first[0].E.bool_ ^ handle.first[2].E.bool_;
break;
case TT_less:
handle.first[0].E.bool_ = handle.first[0].E.bool_ < handle.first[2].E.bool_;
break;
case TT_greater:
handle.first[0].E.bool_ = handle.first[0].E.bool_ > handle.first[2].E.bool_;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.bool_ >= handle.first[2].E.bool_;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = handle.first[0].E.bool_ >= handle.first[2].E.bool_;
break;
case TT_equality:
handle.first[0].E.bool_ = handle.first[0].E.bool_ == handle.first[2].E.bool_;
break;
case TT_inequality:
handle.first[0].E.bool_ = handle.first[0].E.bool_ != handle.first[2].E.bool_;
break;
default:
break;
}
}
else if (handle.first[0].E.data_type == STRING &&
handle.first[2].E.data_type == STRING)
{
if (handle.first[1].token->type == TT_plus)
{
appendStringToString(handle.first[0].E.str, handle.first[2].E.str);
return;
}
int compare_result = strcmp(handle.first[0].E.str->data, handle.first[2].E.str->data);
switch (handle.first[1].token->type)
{
case TT_less:
handle.first[0].E.bool_ = compare_result < 0;
break;
case TT_greater:
handle.first[0].E.bool_ = compare_result > 0;
break;
case TT_lessOrEqual:
handle.first[0].E.bool_ = compare_result <= 0;
break;
case TT_greaterOrEqual:
handle.first[0].E.bool_ = compare_result >= 0;
break;
case TT_equality:
handle.first[0].E.bool_ = compare_result == 0;
break;
case TT_inequality:
handle.first[0].E.bool_ = compare_result != 0;
break;
default:
break;
}
}
else
{
setError(ERR_Reduction);
return;
}
}
// 3, 4, 6, 8 .. tokens
static inline void reduce_handle_function(THandle handle)
{
int num_of_commas = 0;
ExprToken *temp = handle.first;
if ((++temp)->token->type != TT_leftBrace)
{
setError(ERR_Reduction);
return;
}
temp++;
Symbol *id = SymbolFind(mainContext, handle.first->token->str.data);
Context *context = id->funCont;
return_value_data_type = (DataType) context->returnType;
for (int32_t i = 0; i < context->argCount; i++) // check arguments
{
if (temp->E.data_type != context->arg[i]->type)
{
setError(ERR_TypeCompatibilityArg);
return;
}
if (i != context->argCount - 1 && (++temp)->token->type != TT_comma)
{
setError(ERR_ArgCount);
return;
}
temp++;
}
// check the end of handle
if ((temp)->token->type != TT_rightBrace || temp != handle.last)
{
setError(ERR_Reduction);
return;
}
// reserve place for return value
b.var_type = CONST; // for pushing initialized flag
b.initialized = false;
a.offset = MY_OFFSET++;
generateInstruction(PUSH, &a, &b, &c); // b = pushed operand
if (id->index >= 0) // normal functions
{
for (int32_t i = 0; i < context->argCount; i++) // push arguments in reversed order
{
temp--;
b = temp->E;
b.initialized = true;
a.offset = MY_OFFSET++;
generateInstruction(PUSH, &a, &b, &c); // b = pushed operand, a = local dst
temp--;
}
}
else // built-in functions
{
for (int32_t i = 0; i < context->argCount; i++) // push arguments in reversed order
{
temp--;
b = temp->E;
b.initialized = true;
a.offset = MY_OFFSET++;
generateInstruction(PUSHX, &a, &b, &c); // b = pushed operand, a = local dst
temp--;
}
}
if (id->stateFunc == FS_Declared)
int64_tVectorAppend(id->adressVector, tape->used);
a.offset = id->index;
c.offset = MY_OFFSET - 1;
// generate CALL instruction
switch (a.offset)
{
case -1:
generateInstruction(CALL_LENGTH, &a, &b, &c);
break;
case -2:
generateInstruction(CALL_COPY, &a, &b, &c);
break;
case -3:
generateInstruction(CALL_FIND, &a, &b, &c);
break;
case -4:
generateInstruction(CALL_SORT, &a, &b, &c);
break;
default:
b.int_ = context->locCount;
generateInstruction(CALL, &a, &b, &c);
break;
}
// reducing tokenvector
MY_OFFSET -= context->argCount;
handle.first->handle_start = false;
handle.first->type = NONTERM;
handle.first->E.data_type = return_value_data_type;
handle.first->E.var_type = LOCAL;
handle.first->E.offset = MY_OFFSET - 1;
if (context->argCount > 1)
num_of_commas = context->argCount - 1;
ExprTokenVectorPopMore(handle.expr_vector, context->argCount + 2 + num_of_commas);
}
static void convert_to_ExprToken(Token *token, ExprTokenVector *expr_vector)
{
Symbol *id = NULL;
assert(token); // just in case
temp_expr_token.type = TERM;
temp_expr_token.handle_start = false;
temp_expr_token.token = token;
temp_expr_token.E.var_type = UNDEF_;
temp_expr_token.E.data_type = UNDEF;
switch(token->type)
{
case TT_identifier:
id = SymbolFind(funcContext, token->str.data);
if (id) // <loc_var> or <arg> or <function>
{
if (check_id_function(id))
token->type = TT_function;
else
{
temp_expr_token.E.var_type = LOCAL;
temp_expr_token.E.offset = id->index;
temp_expr_token.E.data_type = (DataType) id->type;
}
}
else
{
id = SymbolFind(mainContext, token->str.data);
if (id) // <glob_var> or <function>
{
if (id->type == T_FunPointer) // function
token->type = TT_function;
else
{
temp_expr_token.E.var_type = GLOBAL;
temp_expr_token.E.offset = id->index;
temp_expr_token.E.data_type = (DataType) id->type;
}
}
}
if (id == NULL)
{
setError(ERR_UndefVarOrFunction);
return;
}
break;
case TT_real:
temp_expr_token.E.var_type = CONST;
temp_expr_token.E.data_type = DOUBLE;
temp_expr_token.E.double_ = token->r;
temp_expr_token.E.initialized = true;
break;
case TT_integer:
temp_expr_token.E.var_type = CONST;
temp_expr_token.E.data_type = INT;
temp_expr_token.E.int_ = token->n;
temp_expr_token.E.initialized = true;
break;
case TT_string:
temp_expr_token.E.var_type = CONST;
temp_expr_token.E.data_type = STRING;
temp_expr_token.E.str = &(token->str);
temp_expr_token.E.initialized = true;
break;
case TT_bool:
temp_expr_token.E.var_type = CONST;
temp_expr_token.E.data_type = BOOL;
temp_expr_token.E.bool_ = (bool)token->n;