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#include "options.h"
#include <thread>
#include <cctype>
#include <cassert>
static int64_t ipow(int64_t b, int64_t e) {
if (e == 0) return 1;
assert(e >= 0);
int64_t x = 1;
while (e > 0) {
if (e & 1) x *= b;
b *= b;
e >>= 1;
}
return x;
}
std::optional<const char*> parse_int_param(int64_t *dest, const char *str) {
if (!str || !*str) return "empty string";
char *endp;
int64_t whole = strtoll(str, &endp, 10);
int64_t fractional = 0, fract_offset = 0;
if (*endp == '.' && isdigit(endp[1])) {
char *endp2;
fractional = strtoll(endp + 1, &endp2, 10);
fract_offset = endp2 - (endp + 1);
endp = endp2;
}
int64_t exponent = 0;
if ((*endp == 'e' || *endp == 'E') && isdigit(endp[1])) {
exponent = strtoll(endp + 1, &endp, 10);
// log2 (10^20) ~= 66 > 64
if (exponent < 0 || exponent >= 20) return "exponent too large";
}
if (fract_offset > exponent) return "not integer (more fractional digits than exponent)";
if (*endp != '\0') return "unexpected character";
*dest = (whole * ipow(10, fract_offset) + fractional) * ipow(10, exponent - fract_offset);
return std::nullopt;
}
void Options::fill_dimensions() {
System sys;
sys.eqs.push_back(
Equation{
Sum{{xmax.toProduct()}},
Sum{{xmin.toProduct(), cplxwidth.toProduct()}}
}
);
sys.eqs.push_back(
Equation{
Sum{{ymax.toProduct()}},
Sum{{ymin.toProduct(), cplxheight.toProduct()}}
}
);
sys.eqs.push_back(
Equation{
Sum{{xmin.toProduct(), xmax.toProduct()}},
Sum{{cx.toProduct().times(2.0)}}
}
);
sys.eqs.push_back(
Equation{
Sum{{ymin.toProduct(), ymax.toProduct()}},
Sum{{cy.toProduct().times(2.0)}}
}
);
sys.eqs.push_back(
Equation{
Sum{{imgwidth.toProduct().times(cplxheight.toProduct())}},
Sum{{cplxwidth.toProduct().times(imgheight.toProduct())}}
}
);
auto res = sys.solve_inplace(debug_paramsolver);
if (auto errmsg = std::get_if<std::string>(&res)) {
std::cerr << *errmsg;
exit(1);
} else {
auto assignment = std::get<1>(res);
xmin.from_computed(assignment);
xmax.from_computed(assignment);
ymin.from_computed(assignment);
ymax.from_computed(assignment);
cplxwidth.from_computed(assignment);
cplxheight.from_computed(assignment);
cx.from_computed(assignment);
cy.from_computed(assignment);
imgwidth.from_computed(assignment);
imgheight.from_computed(assignment);
}
}
void Options::validate() {
if (maxiter.value < 0) {
std::cerr << "Negative maxiter" << std::endl;
exit(1);
}
if (numorbits.value < 0) {
std::cerr << "Negative numorbits" << std::endl;
exit(1);
}
if (num_threads.value <= 0) {
std::cerr << "Non-positive number of threads" << std::endl;
exit(1);
}
if (orbit_burnin.value < 0) {
std::cerr << "Negative orbit_burnin" << std::endl;
exit(1);
}
if (!outfname.valid()) {
std::cerr << "Output filename (-o) not given" << std::endl;
exit(1);
}
if (imgwidth.value <= 0 || imgheight.value <= 0) {
std::cerr << "Zero or negative image size; check window options" << std::endl;
exit(1);
}
}
std::ostream& operator<<(std::ostream &os, const Options &opts) {
os << "window: [" << opts.xmin.value << "," << opts.xmax.value << "] (" << opts.cplxwidth.value << ") x [" << opts.ymin.value << "," << opts.ymax.value << "] (" << opts.cplxheight.value << ") around (" << opts.cx.value << "," << opts.cy.value << ")\n";
os << "image: " << opts.imgwidth.value << " x " << opts.imgheight.value << "; ";
os << "maxiter=" << opts.maxiter.value << "; ";
os << "numorbits=" << opts.numorbits.value << "; ";
os << "num_threads=" << opts.num_threads.value << "; ";
os << "algorithm=" << opts.algorithm.value;
return os;
}
void usage(const char *argv0) {
std::cout << "Usage: " << argv0 << " [OPTIONS]\n";
std::cout << " -L [float] Left boundary of window in C (xmin)\n";
std::cout << " -R [float] Right boundary of window in C (xmax)\n";
std::cout << " -T [float] Top boundary of window in C (ymax)\n";
std::cout << " -B [float] Bottom boundary of window in C (ymin)\n";
std::cout << " -W [float] Width of window in C (cplxwidth)\n";
std::cout << " -H [float] Height of window in C (cplxheight)\n";
std::cout << " -X [float] Horizontal middle of window in C (cx)\n";
std::cout << " -Y [float] Vertical middle of window in C (cy)\n";
std::cout << " -w [int] Image width (imgwidth)\n";
std::cout << " -h [int] Image height (imgheight)\n";
std::cout << " -m [int] Number of iterations before escape (maxiter)\n";
std::cout << " -n [int] Number of orbits to trace (numorbits)\n";
std::cout << " -t [int] Number of threads (num_threads)\n";
std::cout << " -o [string] Output file name (PNG file) (outfname)\n";
std::cout << " -al [string] Algorithm to use (see compute.cpp) (algorithm)\n";
std::cout << " --help This text\n";
std::cout << "\n";
std::cout << " -ds Debug window equation solving\n";
std::cout << std::flush;
}
Options parse_options(int argc, char **argv) {
Options options;
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-L") == 0) options.xmin.parse(argv[i+1], "-L"), i++;
else if (strcmp(argv[i], "-R") == 0) options.xmax.parse(argv[i+1], "-R"), i++;
else if (strcmp(argv[i], "-T") == 0) options.ymax.parse(argv[i+1], "-T"), i++;
else if (strcmp(argv[i], "-B") == 0) options.ymin.parse(argv[i+1], "-B"), i++;
else if (strcmp(argv[i], "-W") == 0) options.cplxwidth.parse(argv[i+1], "-W"), i++;
else if (strcmp(argv[i], "-H") == 0) options.cplxheight.parse(argv[i+1], "-H"), i++;
else if (strcmp(argv[i], "-X") == 0) options.cx.parse(argv[i+1], "-X"), i++;
else if (strcmp(argv[i], "-Y") == 0) options.cy.parse(argv[i+1], "-Y"), i++;
else if (strcmp(argv[i], "-w") == 0) options.imgwidth.parse(argv[i+1], "-w"), i++;
else if (strcmp(argv[i], "-h") == 0) options.imgheight.parse(argv[i+1], "-h"), i++;
else if (strcmp(argv[i], "-m") == 0) options.maxiter.parse(argv[i+1], "-m"), i++;
else if (strcmp(argv[i], "-n") == 0) options.numorbits.parse(argv[i+1], "-n"), i++;
else if (strcmp(argv[i], "-ds") == 0) options.debug_paramsolver = true;
else if (strcmp(argv[i], "-t") == 0) options.num_threads.parse(argv[i+1], "-t"), i++;
else if (strcmp(argv[i], "-o") == 0) options.outfname.parse(argv[i+1], "-o"), i++;
else if (strcmp(argv[i], "-al") == 0) options.algorithm.parse(argv[i+1], "-o"), i++;
else if (strcmp(argv[i], "--help") == 0) { usage(argv[0]); exit(0); }
else {
std::cerr << "Unexpected argument '" << argv[i] << "'" << std::endl;
exit(1);
}
}
options.fill_dimensions();
options.validate();
return options;
}
// vim: set sw=4 ts=4 noet:
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