mirror of
https://github.com/zenorogue/hyperrogue.git
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270 lines
7.5 KiB
C++
270 lines
7.5 KiB
C++
// Hyperbolic Rogue -- basic utility functions
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// Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details
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/** \file util.cpp
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* \brief basic utility functions: maths, parsing expressions
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*/
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#include "hyper.h"
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namespace hr {
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#if CAP_TIMEOFDAY
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#if !CAP_SDL
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int lastusec;
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int uticks;
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int SDL_GetTicks() {
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struct timeval tim;
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gettimeofday(&tim, NULL);
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int newusec = tim.tv_usec;
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uticks += newusec - lastusec;
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if(newusec <= lastusec)
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uticks += 1000000;
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lastusec = newusec;
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return uticks / 1000;
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}
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#endif
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#endif
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EX long double sqr(long double x) { return x*x; }
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EX ld round_nearest(ld x) { if(x > 0) return int(x+.5); else return -int(.5-x); }
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EX ld round_nearest(ld x, ld multiple_of) { return multiple_of * round_nearest(x / multiple_of); }
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EX int gcd(int i, int j) {
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return i ? gcd(j%i, i) : j;
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}
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EX int gmod(int i, int j) {
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i %= j; if(i<0) i += j;
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return i;
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}
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EX int gdiv(int i, int j) {
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return (i - gmod(i, j)) / j;
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}
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EX ld frac(ld x) {
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x -= int(x);
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if(x < 0) x++;
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return x;
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}
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EX ld lerp(ld a0, ld a1, ld x) {
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return a0 + (a1-a0) * x;
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}
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EX ld ilerp(ld a0, ld a1, ld x) {
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return (x-a0) / (a1-a0);
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}
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// debug utilities
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#if CAP_PROFILING
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#define FRAMES 64
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#define CATS 16
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long long proftable[16][FRAMES];
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int pframeid;
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void profile_frame() {
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pframeid++; pframeid %= FRAMES;
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for(int t=0; t<16; t++) proftable[t][pframeid] = 0;
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}
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EX void profile_start(int t) { proftable[t][pframeid] -= getms(); }
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EX void profile_stop(int t) { proftable[t][pframeid] += getms(); }
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void profile_info() {
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for(int t=0; t<16; t++) {
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sort(proftable[t], proftable[t]+FRAMES);
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if(proftable[t][FRAMES-1] == 0) continue;
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long long sum = 0;
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for(int f=0; f<FRAMES; f++) sum += proftable[t][f];
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printf("Category %d: avg = %Ld, %Ld..%Ld..%Ld..%Ld..%Ld\n",
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t, sum / FRAMES, proftable[t][0], proftable[t][16], proftable[t][32],
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proftable[t][48], proftable[t][63]);
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}
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}
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#endif
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#if !CAP_PROFILING
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#if HDR
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#define profile_frame()
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#define profile_start(t)
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#define profile_stop(t)
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#define profile_info()
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#endif
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#endif
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EX purehookset hooks_tests;
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EX string simplify(const string& s) {
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string res;
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for(char c: s) if(isalnum(c)) res += c;
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return res;
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}
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EX bool appears(const string& haystack, const string& needle) {
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return simplify(haystack).find(simplify(needle)) != string::npos;
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}
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#if HDR
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struct exp_parser {
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string s;
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int at;
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exp_parser() { at = 0; }
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map<string, cld> extra_params;
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bool ok() { return at == isize(s); }
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char next(int step=0) { if(at >= isize(s)-step || at == -1) return 0; else return s[at+step]; }
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bool eat(const char *c) {
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int orig_at = at;
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while(*c && *c == next()) at++, c++;
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if(*c == 0) return true;
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else at = orig_at;
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return false;
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}
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cld parse(int prio = 0);
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cld parsepar() {
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cld res = parse();
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if(next() != ')') { at = -1; return res; }
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at++;
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return res;
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}
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};
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#endif
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cld exp_parser::parse(int prio) {
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cld res;
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while(next() == ' ') at++;
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if(eat("sin(")) res = sin(parsepar());
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else if(eat("cos(")) res = cos(parsepar());
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else if(eat("sinh(")) res = sinh(parsepar());
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else if(eat("cosh(")) res = cosh(parsepar());
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else if(eat("asin(")) res = asin(parsepar());
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else if(eat("acos(")) res = acos(parsepar());
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else if(eat("asinh(")) res = asinh(parsepar());
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else if(eat("acosh(")) res = acosh(parsepar());
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else if(eat("exp(")) res = exp(parsepar());
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else if(eat("log(")) res = log(parsepar());
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else if(eat("tan(")) res = tan(parsepar());
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else if(eat("tanh(")) res = tanh(parsepar());
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else if(eat("atan(")) res = atan(parsepar());
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else if(eat("atanh(")) res = atanh(parsepar());
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else if(eat("abs(")) res = abs(parsepar());
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else if(eat("re(")) res = real(parsepar());
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else if(eat("im(")) res = imag(parsepar());
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else if(eat("conj(")) res = std::conj(parsepar());
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else if(eat("floor(")) res = floor(real(parsepar()));
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else if(eat("frac(")) { res = parsepar(); res = res - floor(real(res)); }
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else if(eat("to01(")) { res = parsepar(); return atan(res) / ld(M_PI) + ld(0.5); }
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else if(eat("ifp(")) {
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cld cond = parse(0);
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if(next() != ',') {at = -1; return 0; } at++;
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cld yes = parse(0);
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if(next() != ',') {at = -1; return 0; } at++;
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cld no = parsepar();
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return real(cond) > 0 ? yes : no;
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}
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else if(eat("rgb(")) {
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cld val0 = parse(0);
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if(next() != ',') {at = -1; return 0; } at++;
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cld val1 = parse(0);
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if(next() != ',') {at = -1; return 0; } at++;
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cld val2 = parsepar();
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switch(int(real(extra_params["p"]) + .5)) {
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case 1: return val0;
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case 2: return val1;
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case 3: return val2;
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default: return 0;
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}
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}
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else if(eat("let(")) {
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string name;
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while(true) {
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char c = next();
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if((c >= '0' && c <= '9') || (c == '.' && next(1) != '.') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')
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name += c, at++;
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else break;
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}
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if(next() != '=') { at = -1; return 0; }
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at++;
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cld val = parse(0);
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if(next() != ',') { at = -1; return 0; }
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at++;
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dynamicval<cld> d(extra_params[name], val);
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return parsepar();
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}
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else if(next() == '(') at++, res = parsepar();
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else {
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string number;
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while(true) {
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char c = next();
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if((c >= '0' && c <= '9') || (c == '.' && next(1) != '.') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')
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number += c, at++;
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else break;
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}
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if(number == "e") res = exp(1);
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else if(number == "i") res = cld(0, 1);
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else if(number == "p" || number == "pi") res = M_PI;
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else if(number == "" && next() == '-') { at++; res = -parse(prio); }
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else if(number == "") at = -1;
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else if(number == "s") res = ticks / 1000.;
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else if(number == "ms") res = ticks;
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else if(number[0] == '0' && number[1] == 'x') res = strtoll(number.c_str()+2, NULL, 16);
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else if(number == "mousex") res = mousex;
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else if(number == "mousey") res = mousey;
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else if(number == "mousez") res = cld(mousex - current_display->xcenter, mousey - current_display->ycenter) / cld(current_display->radius, 0);
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else if(number == "shot") res = inHighQual ? 1 : 0;
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else if(extra_params.count(number)) res = extra_params[number];
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else if(params.count(number)) res = params.at(number);
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else if(number[0] >= 'a' && number[0] <= 'z') at = -1;
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else { std::stringstream ss; res = 0; ss << number; ss >> res; }
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}
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while(true) {
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#if CAP_ANIMATIONS
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if(next() == '.' && next(1) == '.' && prio == 0) {
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vector<cld> rest = { res };
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while(next() == '.' && next(1) == '.') {
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at += 2; rest.push_back(parse(10));
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}
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ld v = ticks * (isize(rest)-1.) / anims::period;
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int vf = v;
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v -= vf;
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vf %= (isize(rest)-1);
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res = rest[vf] + (rest[vf+1] - rest[vf]) * v;
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return res;
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}
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else
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#endif
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if(next() == '+' && prio <= 10) at++, res = res + parse(20);
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else if(next() == '-' && prio <= 10) at++, res = res - parse(20);
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else if(next() == '*' && prio <= 20) at++, res = res * parse(30);
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else if(next() == '/' && prio <= 20) at++, res = res / parse(30);
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else if(next() == '^') at++, res = pow(res, parse(40));
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else break;
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}
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return res;
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}
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EX ld parseld(const string& s) {
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exp_parser ep;
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ep.s = s;
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return real(ep.parse());
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}
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EX string parser_help() {
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return XLAT("Functions available: %1",
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"(a)sin(h), (a)cos(h), (a)tan(h), exp, log, abs, re, im, conj, let(t=...,...t...), floor, frac, e, i, pi, s, ms, mousex, mousey, mousez, shot [1 if taking screenshot/animation], to01, ifp(a,v,w) [if positive]");
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}
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}
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