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#include "simpleCalc.h"
#include "calculator.h"
#include <ctype.h> // for isdigit
#include <string.h> // for strcmp/strlen/stpcpy/strdup
#include <stdlib.h> // for calloc
#include <stdio.h>
#include <gmp.h>
#include <mpfr.h>
#ifdef MEMWATCH
#include "memwatch.h"
#endif
static char lastchar = 0;
static char operator = 0;
static char append = 1;
static mpfr_t cur_number;
static mpfr_t prev_number;
void simpleCalcInit();
void simpleEval()
{
simpleCalcInit();
Dprintf("operator: %c\n", operator);
switch (operator) {
case '+':
simple_exp(prev_number, prev_number, wplus, cur_number);
break;
case '-':
simple_exp(prev_number, prev_number, wminus, cur_number);
break;
case '*':
simple_exp(prev_number, prev_number, wmult, cur_number);
break;
case '/':
simple_exp(prev_number, prev_number, wdiv, cur_number);
break;
default:
mpfr_set(prev_number, cur_number, GMP_RNDN);
break;
}
}
char *simpleCalc(unsigned char input, char *expStr)
{
simpleCalcInit();
Dprintf("simpleCalc: %c, %s\n", input, expStr);
Dprintf(" ~ cur: %f, prev: %f\n", mpfr_get_d(cur_number, GMP_RNDN),
mpfr_get_d(prev_number, GMP_RNDN));
if (input == '+' || input == '-' || input == '*' || input == '/') {
// if the input is one of the operators
append = 0;
if (lastchar != input) {
parseme(expStr);
mpfr_set(cur_number, last_answer, GMP_RNDN);
}
simpleEval();
operator = input;
} else if (input == '=') {
simpleEval();
set_prettyanswer(prev_number);
mpfr_set(cur_number, prev_number, GMP_RNDN);
mpfr_set(last_answer, prev_number, GMP_RNDN);
operator = 0;
append = 0;
return NULL;
} else if (input == conf.dec_delimiter || isdigit(input)) {
// if the input is part of a number
char *newStr;
if (append && input != conf.dec_delimiter && !strcmp(expStr, "0")) {
append = 0;
}
if (append) {
char *tail;
newStr = (char *)calloc(sizeof(char), strlen(expStr) + 2);
tail = (char *)stpcpy(newStr, expStr);
*tail = input;
} else {
newStr = (char *)calloc(sizeof(char), 2);
*newStr = input;
}
append = 1;
parseme(newStr);
mpfr_set(cur_number, last_answer, GMP_RNDN);
return newStr;
} else {
// if the input is not an acceptable character... do nothing
return strdup(expStr);
}
lastchar = input;
set_prettyanswer(prev_number);
return NULL;
}
void simpleClearEntry()
{
simpleCalcInit();
mpfr_set_ui(cur_number, 0, GMP_RNDN);
// operator = 0;
lastchar = 0;
}
void simpleCalcInit()
{
static int initialized = 0;
if (!initialized) {
mpfr_init(cur_number);
mpfr_init(last_answer);
mpfr_init_set_ui(cur_number, 0, GMP_RNDN);
mpfr_init_set_ui(last_answer, 0, GMP_RNDN);
initialized = 1;
}
}
void simpleClearAll()
{
simpleCalcInit();
mpfr_set_ui(cur_number, 0, GMP_RNDN);
mpfr_set_ui(last_answer, 0, GMP_RNDN);
mpfr_set_ui(prev_number, 0, GMP_RNDN);
operator = 0;
lastchar = 0;
}
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