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interpret.c
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interpret.c
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/*****************************************************************************************
*
* IFJ - interpret of IFJ15 language
*
* interpret module header
* interpret internal code
*
* author: Libor Janíček (xjanic21)
* created: 2015-11-16
* modified: 2015-11-16
*
*****************************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <stdbool.h>
#include "instlist.h"
#include "pointerstack.h"
#include "ial.h"
#include "interpret.h"
typedef struct {
union {
int intValue;
double doubleValue;
char *stringValue;
};
bool defined;
} frame_T;
static pointerStack_T frameStack;
static pointerStack_T blockStack;
static pointerStack_T callBlockStack;
static pointerStack_T instructionStack;
static pointerStack_T returnAddressStack;
static pointerStack_T stringStack;
frame_T *allocFrame(block_T *block)
{
unsigned int size = block->symbols.count;
//printf("size %d\n",size );
frame_T *frame = malloc(sizeof(frame_T) * size);
for (unsigned int i = 0; i < size; ++i)
{
frame[i].intValue = 0;
frame[i].defined = false;
}
return frame;
}
void freeInterpret()
{
destroyPS(&frameStack);
destroyPS(&blockStack);
destroyPS(&callBlockStack);
destroyPS(&instructionStack);
destroyPS(&returnAddressStack);
// destroy strings
void *string;
while ((string = topPS(&stringStack)) != NULL)
{
free(string);
popPS(&stringStack);
}
destroyPS(&stringStack);
}
int interpret(block_T *b)
{
initPS(&frameStack);
initPS(&blockStack);
initPS(&callBlockStack);
initPS(&instructionStack);
initPS(&returnAddressStack);
block_T *block = b;
frame_T *frame = allocFrame(block);
instruction_T *instruction = NULL;
symbol_T *returnAddress = NULL;
int paramaterCounter = 0;
while (1)
{
instruction = getNextIL(&block->program, instruction);
//printf("%d: ", instruction->type);
frame_T *source1 = NULL;
frame_T *source2 = NULL;
frame_T *destination = NULL;
dataType_T source1Type = INT_TY;
dataType_T source2Type = INT_TY;
dataType_T destinationType = INT_TY;
if (!instruction)
{
//free(block);
if ((block = topPS(&blockStack)) != NULL)
{
instruction = topPS(&instructionStack);
popPS(&blockStack);
popPS(&instructionStack);
continue;
}
else
break;
}
if (instruction->type >= ADD_I && instruction->type <= SCAN_I)
{
if (instruction->type != PRINT_I)
{
destination = &frame[(int) ((symbol_T *)instruction->destination)->data];
destinationType = ((symbol_T *)instruction->destination)->dataType;
destination->defined = true;
}
if (instruction->type != SCAN_I)
{
if (((symbol_T *)instruction->source1)->type == VARIABLE_ST)
{
source1 = &frame[(int) ((symbol_T *)instruction->source1)->data];
if (!source1->defined)
{
fprintf(stderr, "non inicialized variable\n");
return 8;
}
}
else
source1 = (frame_T *)&((symbol_T *)instruction->source1)->data;
source1Type = ((symbol_T *)instruction->source1)->dataType;
}
if (instruction->type != ASSIGN_I && instruction->type != PRINT_I && instruction->type != SCAN_I)
{
if (((symbol_T *)instruction->source2)->type == VARIABLE_ST)
{
source2 = &frame[(int) ((symbol_T *)instruction->source2)->data];
if (!source2->defined)
{
fprintf(stderr, "non inicialized variable\n");
return 8;
}
}
else
source2 = (frame_T *)&((symbol_T *)instruction->source2)->data;
source2Type = ((symbol_T *)instruction->source2)->dataType;
}
}
//printf("I: %d\n", instruction->type);
switch (instruction->type)
{
case NEW_FRAME_I:
{
//fprintf(stderr,"newframe %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
pushPS(&frameStack, frame);
frame = allocFrame(instruction->destination);
paramaterCounter = 0;
break;
}
case SET_PARAMETR_I:
{
//fprintf(stderr,"serparam %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
if (((symbol_T *)instruction->source1)->type == VARIABLE_ST)
{
frame[paramaterCounter] = oldFrame[(int) ((symbol_T *)instruction->source1)->data];
if (!oldFrame[(int) ((symbol_T *)instruction->source1)->data].defined)
{
fprintf(stderr, "non inicialized variable in function parameter\n");
return 8;
}
}
else
frame[paramaterCounter].doubleValue = ((symbol_T *)instruction->source1)->doubleValue;
frame[paramaterCounter].defined = true;
paramaterCounter++;
break;
}
case SUBSTRING_I:
{
//fprintf(stderr,"substring %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
int returnIndex = ((symbol_T *) instruction->source1)->intValue;
int index = frame[1].intValue;
int count = frame[2].intValue;
char *string = frame[0].stringValue;
int size = strlen(string);
oldFrame[returnIndex].stringValue = allocString("", count);
pushPS(&stringStack, oldFrame[returnIndex].stringValue);
if (index + count <= size)
{
memcpy(oldFrame[returnIndex].stringValue, &frame[0].stringValue[index], count );
oldFrame[returnIndex].stringValue[count] = '\0';
oldFrame[returnIndex].defined = true;
}
else
fprintf(stderr, "substr out of range\n");
free(frame);
frame = oldFrame;
popPS(&frameStack);
break;
}
case LENGTH_I:
{
//fprintf(stderr,"lengtg %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
if (((symbol_T *) instruction->source1)->dataType == INT_TY)
oldFrame[((symbol_T *) instruction->source1)->intValue].intValue = strlen(frame[0].stringValue);
else
oldFrame[((symbol_T *) instruction->source1)->intValue].doubleValue = (double) strlen(frame[0].stringValue);
oldFrame[((symbol_T *) instruction->source1)->intValue].defined = true;
free(frame);
frame = oldFrame;
popPS(&frameStack);
break;
}
case FIND_I:
{
//fprintf(stderr,"find %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
if (((symbol_T *) instruction->source1)->dataType == INT_TY)
oldFrame[((symbol_T *) instruction->source1)->intValue].intValue = find(frame[0].stringValue, frame[1].stringValue);
else
oldFrame[((symbol_T *) instruction->source1)->intValue].doubleValue = (double) find(frame[0].stringValue, frame[1].stringValue);
oldFrame[((symbol_T *) instruction->source1)->intValue].defined = true;
free(frame);
frame = oldFrame;
popPS(&frameStack);
break;
}
case SORT_I:
{
//fprintf(stderr,"sort %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue = allocString(frame[0].stringValue, 0);
pushPS(&stringStack, oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue);
sort(oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue);
oldFrame[((symbol_T *) instruction->source1)->intValue].defined = true;
free(frame);
frame = oldFrame;
popPS(&frameStack);
break;
}
case CONCAT_I:
{
//fprintf(stderr,"concat %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
int size = strlen(frame[1].stringValue);
oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue = allocString(frame[0].stringValue, size);
pushPS(&stringStack, oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue);
strcat(oldFrame[((symbol_T *) instruction->source1)->intValue].stringValue, frame[1].stringValue);
oldFrame[((symbol_T *) instruction->source1)->intValue].defined = true;
free(frame);
frame = oldFrame;
popPS(&frameStack);
break;
}
case CALL_I:
{
//fprintf(stderr,"call %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
pushPS(&blockStack, block);
pushPS(&callBlockStack, block);
pushPS(&instructionStack, instruction);
pushPS(&returnAddressStack, returnAddress);
block = instruction->destination;
returnAddress = instruction->source1;
instruction = NULL;
break;
}
case RETURN_I:
{
//fprintf(stderr,"return %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
frame_T *oldFrame = topPS(&frameStack);
if (!instruction->source1)
{
fprintf(stderr, "return missing\n");
return 8;
}
if (oldFrame)
{
if (((symbol_T *)instruction->source1)->dataType == STRING_TY && returnAddress->dataType == STRING_TY)
{
//printf("%p\n", ((symbol_T *)instruction->source1)->stringValue);
if (((symbol_T *)instruction->source1)->type == VARIABLE_ST)
oldFrame[returnAddress->intValue].stringValue = allocString(frame[((symbol_T *)instruction->source1)->intValue].stringValue, 0);
else
oldFrame[returnAddress->intValue].stringValue = allocString(((symbol_T *)instruction->source1)->stringValue, 0);
pushPS(&stringStack, oldFrame[returnAddress->intValue].stringValue);
}
else if (((symbol_T *)instruction->source1)->type == VARIABLE_ST)
{
if (((symbol_T *)instruction->source1)->dataType == returnAddress->dataType)
oldFrame[returnAddress->intValue] = frame[((symbol_T *)instruction->source1)->intValue];
else if (returnAddress->dataType == INT_TY)
oldFrame[returnAddress->intValue].intValue = (int) frame[((symbol_T *)instruction->source1)->intValue].doubleValue;
else if (returnAddress->dataType == DOUBLE_TY)
oldFrame[returnAddress->intValue].doubleValue = (double) frame[((symbol_T *)instruction->source1)->intValue].intValue;
}
else
{
if (((symbol_T *)instruction->source1)->dataType == returnAddress->dataType)
oldFrame[returnAddress->intValue].doubleValue = ((symbol_T *)instruction->source1)->doubleValue;
else if (returnAddress->dataType == INT_TY)
oldFrame[returnAddress->intValue].intValue = (int) ((symbol_T *)instruction->source1)->doubleValue;
else if (returnAddress->dataType == DOUBLE_TY)
oldFrame[returnAddress->intValue].doubleValue = (double) ((symbol_T *)instruction->source1)->intValue;
}
oldFrame[returnAddress->intValue].defined = true;
free(frame);
frame = oldFrame;
popPS(&frameStack);
block_T *callBlock = topPS(&callBlockStack);
int i = 0;
do
{
i++;
block = topPS(&blockStack);
//printf("%p\n", block);
popPS(&blockStack);
instruction = topPS(&instructionStack);
popPS(&instructionStack);
}
while (callBlock != block);
//printf("pop: %d\n", i);
popPS(&callBlockStack);
returnAddress = topPS(&returnAddressStack);
popPS(&returnAddressStack);
continue;
}
else
return 0;
}
case IF_I:
{
//fprintf(stderr,"if %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
int source1 = frame[(int) ((symbol_T *)instruction->source1)->data].intValue;
//printf("S %d\n", source1);
if (source1)
{
pushPS(&blockStack, block);
pushPS(&instructionStack, instruction);
block = instruction->destination;
instruction = NULL;
continue;
//printf("if IC: %d\n", block->program.count);
}
else
{
pushPS(&blockStack, block);
pushPS(&instructionStack, instruction);
block = instruction->source2;
instruction = NULL;
continue;
//printf("else IC: %d\n", block->program.count);
}
break;
}
case IF_NOT_BREAK_I:
{
//fprintf(stderr,"innotbreak %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
int source1 = frame[(int) ((symbol_T *)instruction->source1)->data].intValue;
if (!source1)
{
block = topPS(&blockStack);
instruction = topPS(&instructionStack);
popPS(&blockStack);
popPS(&instructionStack);
continue;
}
break;
}
case BLOCK_I:
{
//fprintf(stderr,"block %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
pushPS(&blockStack, block);
pushPS(&instructionStack, instruction);
block = instruction->destination;
instruction = NULL;
continue;
}
case JUMP_START_I:
{
//fprintf(stderr,"jmpstart %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
int declarationLength = (int) instruction->destination;
instruction = NULL;
for (int i = 0; i < declarationLength; ++i)
instruction = getNextIL(&block->program, instruction);
break;
}
case ADD_I: // +
{
//fprintf(stderr,"add %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (destinationType == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
destination->doubleValue = op1 + op2;
}
else
destination->intValue = source1->intValue + source2->intValue;
break;
}
case SUB_I: // -
{
//fprintf(stderr,"sub %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (destinationType == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
destination->doubleValue = op1 - op2;
}
else
destination->intValue = source1->intValue - source2->intValue;
break;
}
case MUL_I: // *
{
//fprintf(stderr,"mul %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (destinationType == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
destination->doubleValue = op1 * op2;
}
else
destination->intValue = source1->intValue * source2->intValue;
break;
}
case DIV_I: // /
{
//fprintf(stderr,"div %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (destinationType == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
if (op2 == 0)
return 9;
destination->doubleValue = op1 / op2;
}
else
{
if (source2->intValue == 0)
return 9;
destination->intValue = source1->intValue / source2->intValue;
}
break;
}
case EQ_I: // ==
{
//fprintf(stderr,"== %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY && source2Type == STRING_TY)
{
destination->intValue = strcmp(source1->stringValue, source2->stringValue) == 0;
}
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 == op2;
}
else
destination->intValue = source1->intValue == source2->intValue;
break;
}
case NEQ_I: // !=
{
//fprintf(stderr,"!= %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY || source2Type == STRING_TY)
destination->intValue = strcmp(source1->stringValue, source2->stringValue) != 0;
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 != op2;
}
else
destination->intValue = source1->intValue != source2->intValue;
break;
}
case G_I: // >
{
//fprintf(stderr,"> %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY || source2Type == STRING_TY)
destination->intValue = strcmp(source1->stringValue, source2->stringValue) > 0;
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 > op2;
}
else
destination->intValue = source1->intValue > source2->intValue;
break;
}
case L_I: // <
{
//fprintf(stderr,"< %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY || source2Type == STRING_TY)
destination->intValue = strcmp(source1->stringValue, source2->stringValue) < 0;
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 < op2;
}
else
destination->intValue = source1->intValue < source2->intValue;
break;
}
case GE_I: // >=
{
//fprintf(stderr,">= %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY || source2Type == STRING_TY)
destination->intValue = strcmp(source1->stringValue, source2->stringValue) >= 0;
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 >= op2;
}
else
destination->intValue = source1->intValue >= source2->intValue;
break;
}
case LE_I: // <=
{
//fprintf(stderr,"<= %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (source1Type == STRING_TY || source2Type == STRING_TY)
destination->intValue = strcmp(source1->stringValue, source2->stringValue) <= 0;
else if (source1Type == DOUBLE_TY || source2Type == DOUBLE_TY)
{
double op1, op2;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
if (source2Type == DOUBLE_TY)
op2 = source2->doubleValue;
else
op2 = (double) source2->intValue;
//printf("%f %f\n", op1, op2);
destination->intValue = op1 <= op2;
}
else
destination->intValue = source1->intValue <= source2->intValue;
break;
}
case ASSIGN_I: // =
{
//fprintf(stderr,"= %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
if (destinationType == DOUBLE_TY)
{
double op1;
if (source1Type == DOUBLE_TY)
op1 = source1->doubleValue;
else
op1 = (double) source1->intValue;
destination->doubleValue = op1;
}
else if (destinationType == INT_TY)
{
int op1;
if (source1Type == DOUBLE_TY)
op1 = (int) source1->doubleValue;
else
op1 = source1->intValue;
destination->intValue = op1;
}
else
{
destination->stringValue = allocString(source1->stringValue, 0);
pushPS(&stringStack, destination->stringValue);
}
break;
}
case PRINT_I: // printf()
{
//fprintf(stderr,"print %d %p %p %p\n", source1Type, instruction->destination, instruction->source1, instruction->source2);
switch (source1Type)
{
case INT_TY:
printf("%d", source1->intValue);
break;
case DOUBLE_TY:
printf("%g", source1->doubleValue);
break;
case STRING_TY:
printf("%s", source1->stringValue);
break;
default:
break;
}
break;
}
case SCAN_I: // scanf()
{
//fprintf(stderr,"scan %p %p %p\n", instruction->destination, instruction->source1, instruction->source2);
string_T tempString;
initS(&tempString);
switch (destinationType)
{
case INT_TY:
if (scanf("%d", &destination->intValue) != 1)
return 7;
break;
case DOUBLE_TY:
if (scanf("%lf", &destination->doubleValue) != 1)
return 7;
break;
case STRING_TY:
{
int sign;
int state = 0;
while ((sign = getchar()) != EOF)
{
switch (state)
{
case 0:
if (!isspace(sign))
{
ungetc(sign, stdin);
state = 1;
}
continue;
case 1:
if (isspace(sign))
{
ungetc(sign, stdin);
state = 2;
}
else
addCharacterS(&tempString, sign);
continue;
}
break;
}
destination->stringValue = tempString.data;
break;
}
default:
break;
}
break;
default:
break;
}
}
}
return 0;
}