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Zeno Rogue
2018-10-23 17:05:46 +02:00
parent 6b47221a64
commit 0a54e56950
4 changed files with 514 additions and 59 deletions
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97
util.cpp
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@@ -151,68 +151,49 @@ struct indenter {
void doindent() { for(int i=0; i<current_indentation; i++) printf(" "); }
struct exp_parser {
string s;
int at;
exp_parser() { at = 0; }
bool ok() { return at == isize(s); }
char next() { if(at == isize(s) || at == -1) return 0; else return s[at]; }
bool eat(const char *c) {
int orig_at = at;
while(*c && *c == next()) at++, c++;
if(*c == 0) return true;
else at = orig_at;
return false;
}
ld parse(int prio = 0) {
ld res;
if(eat("sin(")) res = sin(parsepar());
else if(eat("cos(")) res = cos(parsepar());
else if(eat("sinh(")) res = sinh(parsepar());
else if(eat("cosh(")) res = cosh(parsepar());
else if(eat("asin(")) res = asin(parsepar());
else if(eat("acos(")) res = acos(parsepar());
else if(eat("asinh(")) res = asinh(parsepar());
else if(eat("acosh(")) res = acosh(parsepar());
else if(eat("exp(")) res = exp(parsepar());
else if(eat("log(")) res = log(parsepar());
else if(next() == '(') at++, res = parsepar();
else {
string number;
while(true) {
char c = next();
if((c >= '0' && c <= '9') || among(c, 'e', 'p', '.'))
number += c, at++;
else break;
}
if(number == "e") res = exp(1);
else if(number == "p" || number == "pi") res = M_PI;
else if(number == "" && next() == '-') res = 0, prio = 0;
else if(number == "") at = -1;
else if(number[0] >= 'a' && number[0] <= 'z') at = -1;
else { std::stringstream ss; res = 0; ss << number; ss >> res; }
}
ld exp_parser::parse(int prio) {
ld res;
if(eat("sin(")) res = sin(parsepar());
else if(eat("cos(")) res = cos(parsepar());
else if(eat("sinh(")) res = sinh(parsepar());
else if(eat("cosh(")) res = cosh(parsepar());
else if(eat("asin(")) res = asin(parsepar());
else if(eat("acos(")) res = acos(parsepar());
else if(eat("asinh(")) res = asinh(parsepar());
else if(eat("acosh(")) res = acosh(parsepar());
else if(eat("exp(")) res = exp(parsepar());
else if(eat("log(")) res = log(parsepar());
else if(eat("tan(")) res = tan(parsepar());
else if(eat("tanh(")) res = tanh(parsepar());
else if(eat("atan(")) res = atan(parsepar());
else if(eat("atanh(")) res = atanh(parsepar());
else if(next() == '(') at++, res = parsepar();
else {
string number;
while(true) {
if(next() == '+' && prio == 0) at++, res = res + parse(1);
else if(next() == '-' && prio == 0) at++, res = res - parse(1);
else if(next() == '*' && prio <= 1) at++, res = res * parse(2);
else if(next() == '/' && prio <= 1) at++, res = res / parse(2);
else if(next() == '^') at++, res = pow(res, parse(3));
char c = next();
if((c >= '0' && c <= '9') || c == '.' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')
number += c, at++;
else break;
}
return res;
if(number == "e") res = exp(1);
else if(number == "p" || number == "pi") res = M_PI;
else if(number == "" && next() == '-') res = 0, prio = 0;
else if(number == "") at = -1;
else if(extra_params.count(number)) res = extra_params[number];
else if(number[0] >= 'a' && number[0] <= 'z') at = -1;
else { std::stringstream ss; res = 0; ss << number; ss >> res; }
}
ld parsepar() {
ld res = parse();
if(next() != ')') { at = -1; return res; }
at++;
return res;
}
};
while(true) {
if(next() == '+' && prio == 0) at++, res = res + parse(1);
else if(next() == '-' && prio == 0) at++, res = res - parse(1);
else if(next() == '*' && prio <= 1) at++, res = res * parse(2);
else if(next() == '/' && prio <= 1) at++, res = res / parse(2);
else if(next() == '^') at++, res = pow(res, parse(3));
else break;
}
return res;
}
ld parseld(const string& s) {
exp_parser ep;