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degree.cpp
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degree.cpp
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//. degree.cpp - 角度と時間の変換
// Copyright (C) 1997,1998,1999,2000,2014 hkuno
// mailto:[email protected]
#include <iostream>
#include <cstdio>
#include <cstring>
#include "degree.h"
using namespace std;
using namespace util;
namespace util {
//------------------------------------------------------------------------
//.----- 定数 PI (π) ----------------------------------------------------
//------------------------------------------------------------------------
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
extern const double PI = M_PI;
extern const double DD2RAD = M_PI / 180;
extern const double HH2RAD = M_PI / 12;
extern const double DS2RAD = M_PI / (180*3600L);
extern const double HS2RAD = M_PI / ( 12*3600L);
extern const double RAD2DD = 180 / M_PI;
extern const double RAD2HH = 12 / M_PI;
extern const double RAD2DS = (180*3600L) / M_PI;
extern const double RAD2HS = ( 12*3600L) / M_PI;
//------------------------------------------------------------------------
//.----- fmod1, fmod2 : 丸め変換 -----------------------------------------
//------------------------------------------------------------------------
//. fmod1(x, r) - x を r で剰余を得て [0...r) の範囲に丸める
//. fmod2(x, r) - x を r で剰余を得て [-r/2...r/2) の範囲に丸める
// ※rは正の数であること
double fmod1(double x, double r)
{
// m = fmod(x, r) にて mの符号はxと同じ
if ((x = fmod(x, r)) < 0)
x += r;
return x;
}
double fmod2(double x, double r)
{
// m = fmod(x, r) にて mの符号はxと同じ
if ((x = fmod(x, r)) < 0)
x += r;
if (x >= r/2)
x -= r;
return x;
}
//------------------------------------------------------------------------
//.----- round : 四捨五入 ------------------------------------------------
//------------------------------------------------------------------------
//. round(x) - 小数点第一位で四捨五入する
//. round(x, point) - 小数部point-1桁を四捨五入し、小数部をpoint桁に丸める
double round(double x)
{
return (x < 0) ? ceil(x - 0.5) : floor(x + 0.5);
}
double round(double x, int point)
{
double base = ::pow(10.0, point);
return round(x * base) / base;
}
//------------------------------------------------------------------------
//.----- sec2ims, min2im : 分秒変換 --------------------------------------
//------------------------------------------------------------------------
//. sec2ims(sec, sign, i, m, s) - 秒(sec)の値を符号、度分秒(i,m,s)に分ける
//. min2im(min, sign, i, m) - 分(min)の値を符号、度分(i,m)に分ける
// ※符号は0以上を '+' とする
void sec2ims(double sec, char& sign, double&i, double& m, double& s)
{
sign = (sec < 0) ? '-' : '+';
double f = fabs(sec);
i = floor(f / 3600); f = f - i * 3600;
m = floor(f / 60 ); s = f - m * 60;
}
void sec2ims(double sec, char& sign, int&i, int& m, double& s)
{
sign = (sec < 0) ? '-' : '+';
double f = fabs(sec);
i = (int)floor(f / 3600); f = f - i * 3600.0;
m = (int)floor(f / 60 ); s = f - m * 60;
}
void min2im(double min, char& sign, double&i, double& m)
{
sign = (min < 0) ? '-' : '+';
double f = fabs(min);
i = floor(f / 60); m = f - i * 60;
}
void min2im(double min, char& sign, int&i, double& m)
{
sign = (min < 0) ? '-' : '+';
double f = fabs(min);
i = (int)floor(f / 60); m = f - i * 60;
}
//------------------------------------------------------------------------
//.----- class Degree : 角度 ---------------------------------------------
//------------------------------------------------------------------------
//----- 文字列化 ---------------------------------------------------------
ostream&
Degree::printDegree(ostream& o) const
{
return o << degree();
}
ostream&
Degree::printRadian(ostream& o) const
{
return o << radian();
}
ostream&
Degree::printDms(ostream& o) const
{
char c;
double d, m, s;
getDms(c, d, m, s);
return o << c << d << "d" << m << "m" << s << "s";
}
ostream&
Degree::printHms(ostream& o) const
{
char c;
double h, m, s;
getHms(c, h, m, s);
return o << c << h << "h" << m << "m" << s << "s";
}
int
Degree::sprintDms(char* buf, const char* fmt, int point) const
{
char sign;
int d, m;
double s;
Degree w(*this);
w.mod180();
w.getDms(sign, d, m, s, point);
if (d == 0 && m == 0 && s == 0) sign = ' '; // ゼロのときは符号なし
if (!fmt) fmt = "%c%02dd %02dm %02.0fs";
return ::sprintf(buf, fmt, sign, d, m, s);
}
int
Degree::sprintDm(char* buf, const char* fmt, int point) const
{
char sign;
int d;
double m;
Degree w(*this);
w.mod180();
w.getDm(sign, d, m, point);
if (d == 0 && m == 0) sign = ' '; // ゼロのときは符号なし
if (!fmt) fmt = "%c%02dd %04.1fm";
return ::sprintf(buf, fmt, sign, d, m);
}
int
Degree::sprintHms(char* buf, const char* fmt, int point) const
{
char c;
int h, m;
double s;
Degree w(*this);
w.mod360();
w.getHms(c, h, m, s, point);
if (!fmt) fmt = "%02dh %02dm %02.0fs";
return ::sprintf(buf, fmt, h, m, s);
}
int
Degree::sprintHm(char* buf, const char* fmt, int point) const
{
char c;
int h;
double m;
Degree w(*this);
w.mod360();
w.getHm(c, h, m, point);
if (!fmt) fmt = "%02dh %04.1fm";
return ::sprintf(buf, fmt, h, m);
}
//----- 文字列解析 -------------------------------------------------------
Degree
Degree::parseDms(const char* p)
{
char sign = '+';
char sep[5];
double d = 0, m = 0, s = 0;
unsigned i;
// 空白を読み飛ばす
while (*p && isspace((uchar) *p))
++p;
// 符号を得る
if (*p == '+' || *p == '-')
sign = *p++;
// 各書式でd,m,sの取得を試みる
if (sscanf(p, "%lf%c%lf%1[m']%lf", &d, sep, &m, sep, &s) == 5) {
// DD?MM'SS["] or DDdMMmSS[s]
}
else if (s = 0, sscanf(p, "%lf %lf %lf", &d, &m, &s) >= 2) {
// DD MM SS or DD MM
}
else if (s = 0, sscanf(p, "%lf%c%lf", &d, sep, &m) == 3) {
// DD?MM
}
else if (strchr(p, '.') == NULL && strlen(p) > 4
&& sscanf(p, "%u", &i) == 1) {
// DDMMSS
d = (i / 10000);
m = (i / 100) % 100;
s = i % 100;
}
else if (sscanf(p, "%lf", &d) == 1) {
// DD.DDD
m = s = 0;
}
else
d = m = s = 0;
Degree deg(d, m, s);
if (sign == '-')
deg.setNeg();
return deg;
}
Degree
Degree::parseHms(const char* p)
{
char sign = '+';
char sep[5];
double h = 0, m = 0, s = 0;
unsigned i;
// 空白を読み飛ばす
while (*p && isspace((uchar) *p))
++p;
// 符号を得る
if (*p == '+' || *p == '-')
sign = *p++;
// 各書式でh,m,sの取得を試みる
if (sscanf(p, "%lf%1[h:]%lf%1[m:]%lf", &h, sep, &m, sep, &s) == 5) {
// HH:MM:SS or HHhMMmSS[s]
}
else if (s = 0, sscanf(p, "%lf %lf %lf", &h, &m, &s) >= 2) {
// HH MM SS or HH MM
}
else if (s = 0, sscanf(p, "%lf%c%lf", &h, sep, &m) == 3) {
// HH?MM
}
else if (strchr(p, '.') == NULL && strlen(p) > 4
&& sscanf(p, "%u", &i) == 1) {
// HHMMSS
h = (i / 10000);
m = (i / 100) % 100;
s = i % 100;
}
else if (sscanf(p, "%lf", &h) == 1) {
// HH.HHH .
m = s = 0;
}
else
h = m = s = 0;
Degree deg;
deg.setHms(h, m, s);
if (sign == '-')
deg.setNeg();
return deg;
}
}//endnamespace util
//. degree.cpp - end.