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main.c
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///////////////////////////////////////////////////////////////////////////////////
// School: Brno University of Technology, Faculty of Information Technology //
// Course: Formal Languages and Compilers //
// Project: IFJ18 //
// Module: Main module //
// Authors: Artem Denisov (xdenis00) //
// Volodymyr Piskun (xpisku03) //
///////////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
// #include "gc/gc.h"
#include "parser/parser.h"
/// Global active token
ifj18_token_t *token;
/// Global hash table
struct ifj18_hash_t *global_table;
int main() {
// if ((garbage_list = malloc(sizeof(tList))) == NULL) {
// error(INTERNAL_ERROR, "can't allocate memory for garbage colector");
// }
// init_list(garbage_list);
global_table = ifj18_hash_new();
// Creating built-in functions
ifj18_obj_t *func_length = init_func();
func_length->obj_type.func.params_num = 1;
func_length->obj_type.func.return_var->type = IFJ18_TYPE_INT;
ifj18_hash_set((kh_value_t *)global_table, "length", func_length);
ifj18_obj_t *func_substr = init_func();
func_substr->obj_type.func.params_num = 3;
func_substr->obj_type.func.return_var->type = IFJ18_TYPE_STRING;
ifj18_hash_set((kh_value_t *)global_table, "substr", func_substr);
ifj18_obj_t *func_ord = init_func();
func_ord->obj_type.func.params_num = 2;
func_ord->obj_type.func.return_var->type = IFJ18_TYPE_INT;
ifj18_hash_set((kh_value_t *)global_table, "ord", func_ord);
ifj18_obj_t *func_chr = init_func();
func_chr->obj_type.func.params_num = 1;
func_chr->obj_type.func.return_var->type = IFJ18_TYPE_STRING;
ifj18_hash_set((kh_value_t *)global_table, "chr", func_chr);
ifj18_obj_t *func_inputi = init_func();
func_inputi->obj_type.func.params_num = 0;
func_inputi->obj_type.func.return_var->type = IFJ18_TYPE_INT;
ifj18_hash_set((kh_value_t *)global_table, "inputi", func_inputi);
ifj18_obj_t *func_inputs = init_func();
func_inputs->obj_type.func.params_num = 0;
func_inputs->obj_type.func.return_var->type = IFJ18_TYPE_STRING;
ifj18_hash_set((kh_value_t *)global_table, "inputs", func_inputs);
ifj18_obj_t *func_inputf = init_func();
func_inputf->obj_type.func.params_num = 0;
func_inputf->obj_type.func.return_var->type = IFJ18_TYPE_FLOAT;
ifj18_hash_set((kh_value_t *)global_table, "inputf", func_inputf);
print_instruction_no_args(".IFJcode18");
printf("JUMP MAIN\n\n");
// Generating code for built-in functions
// Excepts int and returns char from ASCII table
// arg1: given int
printf(
"LABEL chr\n"
"PUSHFRAME\n"
"DEFVAR LF@%%retval\n"
"DEFVAR LF@param1\n"
"MOVE LF@param1 LF@%%1\n"
"INT2CHAR LF@%%retval LF@param1\n"
"POPFRAME\n"
"RETURN\n\n"
);
// Return string length
// arg1: given string
printf(
"LABEL length\n"
"PUSHFRAME\n"
"DEFVAR LF@%%retval\n"
"DEFVAR LF@param1\n"
"MOVE LF@param1 LF@%%1\n"
"STRLEN LF@%%retval LF@param1\n"
"POPFRAME\n"
"RETURN\n\n"
);
// Returns substring of a given string
// arg1: given string
// arg2: index of of the substring beginning
// arg3: length of the string
printf(
"LABEL substr\n"
"PUSHFRAME\n"
"DEFVAR LF@%%retval\n"
"MOVE LF@%%retval string@\n"
"DEFVAR LF@param1\n"
"MOVE LF@param1 LF@%%1\n"
"DEFVAR LF@param2\n"
"MOVE LF@param2 LF@%%2\n"
"DEFVAR LF@param3\n"
"MOVE LF@param3 LF@%%3\n"
"DEFVAR LF@%%str_temp1\n"
"DEFVAR LF@%%str_temp2\n"
"STRLEN LF@%%str_temp2 LF@param1\n"
"JUMPIFEQ %%assert_zero LF@%%str_temp2 int@0\n"
"LT LF@%%str_temp1 LF@param2 int@1\n"
"JUMPIFEQ %%assert_zero LF@%%str_temp1 bool@true\n"
"LT LF@%%str_temp1 LF@param3 int@0\n"
"JUMPIFEQ %%truncate_N LF@%%str_temp1 bool@true\n"
"SUB LF@%%str_temp1 LF@%%str_temp2 LF@param2\n"
"GT LF@%%str_temp1 LF@param3 LF@%%str_temp1\n"
"JUMPIFEQ %%truncate_N LF@%%str_temp1 bool@true\n"
"JUMP %%cycle_start\n"
"LABEL %%truncate_N\n"
"SUB LF@%%str_temp1 LF@%%str_temp2 LF@param2\n"
"ADD LF@%%str_temp1 LF@%%str_temp1 int@1\n"
"MOVE LF@param3 LF@%%str_temp1\n"
"LABEL %%cycle_start\n"
"SUB LF@param2 LF@param2 int@1\n"
"MOVE LF@%%retval string@\n"
"LABEL %%compare_next\n"
"JUMPIFEQ %%all_done LF@param3 int@0\n"
"GETCHAR LF@%%str_temp1 LF@param1 LF@param2\n"
"CONCAT LF@%%retval LF@%%retval LF@%%str_temp1\n"
"ADD LF@param1 LF@param2 int@1\n"
"SUB LF@param2 LF@param3 int@1\n"
"JUMP %%compare_next\n"
"LABEL %%assert_zero\n"
"MOVE LF@%%retval string@\n"
"LABEL %%all_done\n"
"POPFRAME\n"
"RETURN\n\n"
);
// Return ASCII value of a character in a string
// arg1: given string
// arg2: int index
printf(
"LABEL ord\n"
"PUSHFRAME\n"
"DEFVAR LF@%%retval\n"
"DEFVAR LF@param1\n"
"MOVE LF@param1 LF@%%1\n"
"DEFVAR LF@param2\n"
"MOVE LF@param2 LF@%%2\n"
"DEFVAR LF@%%str_temp1\n"
"DEFVAR LF@%%str_temp2\n"
"STRLEN LF@%%retval LF@param1\n"
"JUMPIFEQ %%assert_zero_end LF@%%retval int@0\n"
"SUB LF@%%retval LF@%%retval int@1\n"
"LT LF@%%str_temp1 LF@param2 int@0\n"
"JUMPIFEQ %%assert_zero_end LF@%%str_temp1 bool@true\n"
"GT LF@%%str_temp1 LF@param2 LF@%%retval\n"
"JUMPIFEQ %%assert_zero_end LF@%%str_temp1 bool@true\n"
"STRI2INT LF@%%retval LF@param1 LF@param2\n"
"JUMP %%ord_end\n"
"LABEL %%assert_zero_end\n"
"MOVE LF@%%retval int@0\n"
"LABEL %%ord_end\n"
"POPFRAME\n"
"RETURN\n\n"
);
get_token();
// Calling the main non-terminal function
PROG();
return 0;
}