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Output with roman numerals in cs2cs for lat-lon #4242

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Output with roman numerals in cs2cs for lat-lon #4242

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74 changes: 69 additions & 5 deletions src/apps/cs2cs.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,8 @@ static bool destIsLongLat = false;
static double destToRadians = 0.0;
static bool destIsLatLong = false;

static bool romanNumerals = false;

static int reversein = 0, /* != 0 reverse input arguments */
reverseout = 0, /* != 0 reverse output arguments */
echoin = 0, /* echo input data to output line */
Expand Down Expand Up @@ -94,6 +96,54 @@ using namespace NS_PROJ::metadata;
using namespace NS_PROJ::util;
using namespace NS_PROJ::internal;

static std::string degToRoman(double angle, const std::string &pos,
const std::string &neg) {
const std::string sign = angle > 0.0 ? pos : neg;
angle = fabs(angle);
double r = angle;
r = floor(r * 3600 + .0005);
int sec = (int)fmod(r, 60.);
r = floor(r / 60.);
int min = (int)fmod(r, 60.);
r = floor(r / 60.);
int deg = (int)r;

auto intToRoman = [](int i) {
int unit = i % 10;
int tenth = i / 10 % 10;
int houndr = i / 100 % 10;
auto oneDigit = [](int digit, const std::string &one,
const std::string &five, const std::string &ten) {
switch (digit) {
case (1):
return one;
case (2):
return one + one;
case (3):
return one + one + one;
case (4):
return one + five;
case (5):
return five;
case (6):
return five + one;
case (7):
return five + one + one;
case (8):
return five + one + one + one;
case (9):
return one + ten;
default:
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Uhmmm, I do not now if it is a flaw, or a feature. It was implemented in a way that 0 uses no-symbol. It would be strange something like d9'12"M , o even d'"S d'"OC for null island. But at the same time I like it even more, because it shows how roman numerals work (or not work).

return std::string{};
}
};
return oneDigit(houndr, "C", "D", "M") +
oneDigit(tenth, "X", "L", "C") + oneDigit(unit, "I", "V", "X");
};
return intToRoman(deg) + "d" + intToRoman(min) + "'" + intToRoman(sec) +
"\"" + sign;
}

/************************************************************************/
/* process() */
/* */
Expand Down Expand Up @@ -208,11 +258,21 @@ static void process(FILE *fid)
fputs(rtodms(pline, sizeof(pline), data.u, 'N', 'S'),
stdout);
} else {
fputs(rtodms(pline, sizeof(pline), data.u, 'N', 'S'),
stdout);
putchar('\t');
fputs(rtodms(pline, sizeof(pline), data.v, 'E', 'W'),
stdout);
if (romanNumerals) {
std::string ns =
(degToRoman(data.u * RAD_TO_DEG, "S", "M"));
std::string ew =
(degToRoman(data.v * RAD_TO_DEG, "OR", "OC"));
fputs(ns.c_str(), stdout);
putchar('\t');
fputs(ew.c_str(), stdout);
} else {
fputs(rtodms(pline, sizeof(pline), data.u, 'N', 'S'),
stdout);
putchar('\t');
fputs(rtodms(pline, sizeof(pline), data.v, 'E', 'W'),
stdout);
}
}
} else if (reverseout) {
fputs(rtodms(pline, sizeof(pline), data.v, 'N', 'S'), stdout);
Expand Down Expand Up @@ -506,6 +566,10 @@ int main(int argc, char **argv) {
std::exit(1);
}
targetEpoch = *argv;
} else if (strcmp(*argv, "--roman") == 0) {
++argv;
--argc;
romanNumerals = true;
} else if (**argv == '-') {
for (arg = *argv;;) {
switch (*++arg) {
Expand Down
8 changes: 8 additions & 0 deletions test/cli/test_cs2cs_various.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -1505,3 +1505,11 @@ tests:
in: 16.248285304 -61.484212843 53.073
out: |
661991.318 1796999.201 93.846
- comment: Test --roman
args: EPSG:4326 EPSG:10606 --roman
in: |
45d8'47.014"N 1d53'20.681"E 0.000
49d28'26.014"S 4d6'18.281"W 0.000
out: |
XLVdVIII'XLVII"S IdLIII'XX"OR 0.000
XLIXdXXVIII'XXVI"M IVdVI'XVIII"OC 0.000