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#include "simpleCalc.h"
#include "calculator.h"
#include "number.h"
#include "string_manip.h"
#include <ctype.h> // for isdigit
#include <string.h> // for strcmp/strlen/stpcpy/strdup
#include <stdlib.h> // for calloc
#include <stdio.h>
#ifdef MEMWATCH
#include "memwatch.h"
#endif
static char append = 1;
static Number cur_number;
static Number prev_number;
static unsigned char operationPending = 0;
void simpleCalcInit();
void simpleCalcEval(const unsigned char op)
{
Dprintf("op: %c\n", op);
switch (op) {
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:
num_set(prev_number, cur_number);
break;
}
}
char *simpleCalc(const unsigned char input, const char *expStr)
{
unsigned int expStrLen = strlen(expStr);
simpleCalcInit();
Dprintf("simpleCalc: %c, %s\n", input, expStr);
Dprintf(" ~ cur: %f, prev: %f\n", num_get_d(cur_number),
num_get_d(prev_number));
switch (input) {
case '+': case '-': case '*': case '/':
{
char * expdup = strdup(expStr);
// Americanize the numbers
if (conf.in_thou_delimiter != 0) {
strstrip(conf.in_thou_delimiter, expdup);
} else {
strstrip(conf.thou_delimiter, expdup);
}
if (conf.in_dec_delimiter != 0 && conf.in_dec_delimiter != '.') {
strswap(conf.in_dec_delimiter, '.', expdup);
} else if (conf.dec_delimiter != '.') {
strswap(conf.dec_delimiter, '.', expdup);
}
// ... and now, depending on the state...
if (operationPending) {
num_set_str(cur_number, expdup, 10);
free(expdup);
simpleCalcEval(operationPending);
operationPending = input;
append = 0;
set_prettyanswer(prev_number);
return strdup(pretty_answer);
} else {
num_set_str(prev_number, expdup, 10);
free(expdup);
operationPending = input;
append = 0;
return strdup(expStr);
}
}
break;
case '=':
append = 0;
{
char * expdup = strdup(expStr);
// Americanize the numbers
if (conf.in_thou_delimiter != 0) {
strstrip(conf.in_thou_delimiter, expdup);
} else {
strstrip(conf.thou_delimiter, expdup);
}
if (conf.in_dec_delimiter != 0 && conf.in_dec_delimiter != '.') {
strswap(conf.in_dec_delimiter, '.', expdup);
} else if (conf.dec_delimiter != '.') {
strswap(conf.dec_delimiter, '.', expdup);
}
// ... and now, depending on the state...
if (! operationPending) {
num_set_str(prev_number, expdup, 10);
free(expdup);
} else {
num_set_str(cur_number, expdup, 10);
free(expdup);
simpleCalcEval(operationPending);
operationPending = 0;
}
}
set_prettyanswer(prev_number);
return NULL; // This should cause it to go through the displayAnswer logic
break;
default:
if (input == conf.dec_delimiter || isdigit(input)) {
char *newStr;
if (append && (strcmp("0",expStr) || input == conf.dec_delimiter)) {
newStr = malloc(expStrLen + 2);
snprintf(newStr, expStrLen + 2, "%s%c", expStr, input);
} else {
newStr = malloc(2);
snprintf(newStr, 2, "%c", input);
append = 1;
}
return newStr;
}
}
return NULL;
}
void simpleClearEntry()
{
simpleCalcInit();
num_set_ui(cur_number, 0);
}
void simpleCalcInit()
{
static int initialized = 0;
if (!initialized) {
num_init(cur_number);
num_init(prev_number);
num_init(last_answer);
num_init_set_ui(cur_number, 0);
num_init_set_ui(last_answer, 0);
initialized = 1;
}
}
void simpleClearAll()
{
simpleCalcInit();
num_set_ui(cur_number, 0);
num_set_ui(last_answer, 0);
num_set_ui(prev_number, 0);
operationPending = 0;
}
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