79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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#include "./operate.h"
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#include "./types.h"
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#include <stdio.h>
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#include <string.h>
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int is_operator(char candidate) {
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return (
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candidate == '*' ||
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candidate == '/' ||
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candidate == '+' ||
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candidate == '-'
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);
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}
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int operate(
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unsigned char operator,
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unsigned char typeA, int aRepr,
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unsigned char typeB, int bRepr,
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unsigned char* typeRes, int* resPtr
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)
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{
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if (
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typeA == TYPE_FLOAT || typeB == TYPE_FLOAT ||
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operator == '/'
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) {
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*typeRes = TYPE_FLOAT;
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float a, b, res;
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if (typeA == TYPE_FLOAT) {
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*((int*) &a) = aRepr;
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}
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if (typeB == TYPE_FLOAT) {
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*((int*) &b) = bRepr;
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}
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if (typeA == TYPE_INT) {
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a = (float) aRepr;
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}
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if (typeB == TYPE_INT) {
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b = (float) bRepr;
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}
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printf("Appling operation: %f %c %f \n", a, operator, b);
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if (operator == '+') {
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res = a+b;
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} else if (operator == '-') {
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res = a-b;
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} else if (operator == '*') {
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res = a*b;
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} else if (operator == '/') {
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res = a/b;
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} else {
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return 2;
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}
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printf("Got float: %f \n", res);
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// get int representation of float
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*resPtr = *(int *)(&res);
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return 0;
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}
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if (typeA == TYPE_INT && typeB == TYPE_INT) {
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printf("Appling operation %d %c %d \n", aRepr, operator, bRepr);
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*typeRes = TYPE_INT;
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int res = 0;
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if (operator == '+') {
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res = aRepr+bRepr;
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} else if (operator == '-') {
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res = aRepr-bRepr;
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} else if (operator == '*') {
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res = aRepr*bRepr;
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} else {
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return 2;
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}
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*resPtr = res;
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return 0;
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}
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return 3;
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}
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