mirrors/hyperrogue
1
0
Fork 0
mirror of https://github.com/zenorogue/hyperrogue.git synced 2025-10-24 10:27:45 +00:00
Code Issues Releases Wiki Activity

parser:: skip_white

Browse Source
This commit is contained in:
Zeno Rogue
2019-12-23 21:18:26 +01:00
parent 26b565702c
commit c70c082f36
1 changed files with 17 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
util.cpp
View File

@@ -139,6 +139,10 @@ struct exp_parser {
return false; return false;
} }
void skip_white();
char snext(int step=0) { skip_white(); return next(step); }
cld parse(int prio = 0); cld parse(int prio = 0);
cld parsepar() { cld parsepar() {
@@ -151,9 +155,13 @@ struct exp_parser {
}; };
#endif #endif
void exp_parser::skip_white() {
while(next() == ' ' || next() == '\n' || next() == '\r' || next() == '\t') at++;
}
cld exp_parser::parse(int prio) { cld exp_parser::parse(int prio) {
cld res; cld res;
while(next() == ' ') at++; skip_white();
if(eat("sin(")) res = sin(parsepar()); if(eat("sin(")) res = sin(parsepar());
else if(eat("cos(")) res = cos(parsepar()); else if(eat("cos(")) res = cos(parsepar());
else if(eat("sinh(")) res = sinh(parsepar()); else if(eat("sinh(")) res = sinh(parsepar());
@@ -177,24 +185,24 @@ cld exp_parser::parse(int prio) {
else if(eat("to01(")) { res = parsepar(); return atan(res) / ld(M_PI) + ld(0.5); } else if(eat("to01(")) { res = parsepar(); return atan(res) / ld(M_PI) + ld(0.5); }
else if(eat("ifp(")) { else if(eat("ifp(")) {
cld cond = parse(0); cld cond = parse(0);
if(next() != ',') {at = -1; return 0; } at++; if(snext() != ',') {at = -1; return 0; } at++;
cld yes = parse(0); cld yes = parse(0);
if(next() != ',') {at = -1; return 0; } at++; if(snext() != ',') {at = -1; return 0; } at++;
cld no = parsepar(); cld no = parsepar();
return real(cond) > 0 ? yes : no; return real(cond) > 0 ? yes : no;
} }
else if(eat("wallif(")) { else if(eat("wallif(")) {
cld val0 = parse(0); cld val0 = parse(0);
if(next() != ',') {at = -1; return 0; } at++; if(snext() != ',') {at = -1; return 0; } at++;
cld val1 = parsepar(); cld val1 = parsepar();
if(real(extra_params["p"]) >= 3.5) return val0; if(real(extra_params["p"]) >= 3.5) return val0;
else return val1; else return val1;
} }
else if(eat("rgb(")) { else if(eat("rgb(")) {
cld val0 = parse(0); cld val0 = parse(0);
if(next() != ',') {at = -1; return 0; } at++; if(snext() != ',') {at = -1; return 0; } at++;
cld val1 = parse(0); cld val1 = parse(0);
if(next() != ',') {at = -1; return 0; } at++; if(snext() != ',') {at = -1; return 0; } at++;
cld val2 = parsepar(); cld val2 = parsepar();
switch(int(real(extra_params["p"]) + .5)) { switch(int(real(extra_params["p"]) + .5)) {
case 1: return val0; case 1: return val0;
@@ -205,16 +213,17 @@ cld exp_parser::parse(int prio) {
} }
else if(eat("let(")) { else if(eat("let(")) {
string name; string name;
skip_white();
while(true) { while(true) {
char c = next(); char c = next();
if((c >= '0' && c <= '9') || (c == '.' && next(1) != '.') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_') if((c >= '0' && c <= '9') || (c == '.' && next(1) != '.') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')
name += c, at++; name += c, at++;
else break; else break;
} }
if(next() != '=') { at = -1; return 0; } if(snext() != '=') { at = -1; return 0; }
at++; at++;
cld val = parse(0); cld val = parse(0);
if(next() != ',') { at = -1; return 0; } if(snext() != ',') { at = -1; return 0; }
at++; at++;
dynamicval<cld> d(extra_params[name], val); dynamicval<cld> d(extra_params[name], val);
return parsepar(); return parsepar();