//
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// Created by YY on 2019/12/23.
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//
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#include "num.h"
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#include <sstream>
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#include <iosfwd>
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#include <iomanip>
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using namespace std;
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long str2int(const uint8_t *s, uint16_t length)
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{
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uint16_t i;
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long n = 0;
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bool sign = false;
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for(i = 0; i < length; i++)
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{
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if(s[i] >= '0' && s[i] <= '9') {
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n = n*10 + s[i] - '0';
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} else if (i == 0 && s[i]=='-') {
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sign = true;
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}
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}
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if (sign) {
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n = 0-n;
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}
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return n;
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}
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bool str2float(double *f, const uint8_t *s, uint16_t length)
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{
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bool sign = false;
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bool getDecimal = false;
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uint16_t i;
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uint64_t m = 0, n = 1;
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double x;
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*f = 0.0;
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for(i = 0; i < length; i++)
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{
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if(s[i] == '-' || s[i] == '+') {
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if(i == 0) {
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if (s[i] == '-') {
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sign = true;
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}
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}
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else {
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return false;
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}
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}
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else if(s[i] == '.') {
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if(getDecimal == true) {
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return false;
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}
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getDecimal = true;
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}
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else if(s[i] >= '0' && s[i] <= '9') {
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m = m*10 + s[i] - '0';
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if(getDecimal == true) {
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n *= 10;
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}
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}
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else {
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return false;
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}
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}
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x = (double)m / (double)n;
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if(sign) {
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x = 0.0 - x;
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}
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*f = x;
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return true;
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}
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int BitCount(uint32_t n)
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{
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n = (n &0x55555555) + ((n >>1) &0x55555555);
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n = (n &0x33333333) + ((n >>2) &0x33333333);
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n = (n &0x0f0f0f0f) + ((n >>4) &0x0f0f0f0f);
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n = (n &0x00ff00ff) + ((n >>8) &0x00ff00ff);
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n = (n &0x0000ffff) + ((n >>16) &0x0000ffff);
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return n ;
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}
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double round(double number, unsigned int bits) {
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stringstream ss;
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ss << setiosflags(ios::fixed) << setprecision(bits) << number;
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ss >> number;
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return number;
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}
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