shithub: libmujs

Info  •  Files  •  Log  •  Branches

Calculate exponent the same way as fractions for symmetry in the lexer.

"3E-1" should have the same rounding error as "0.3"

--- a/jslex.c

+++ b/jslex.c

@@ -283,6 +283,7 @@

 static inline int lexnumber(js_State *J)

 {

 	double n;

+	double e;

 	if (ACCEPT('0')) {

 		if (ACCEPT('x') || ACCEPT('X')) {

@@ -294,18 +295,21 @@

 		n = 0;

 		if (ACCEPT('.'))

 			n += lexfraction(J);

-		n *= pow(10, lexexponent(J));

 	} else if (ACCEPT('.')) {

 		if (!isdec(PEEK))

 			return '.';

 		n = lexfraction(J);

-		n *= pow(10, lexexponent(J));

 	} else {

 		n = lexinteger(J);

 		if (ACCEPT('.'))

 			n += lexfraction(J);

-		n *= pow(10, lexexponent(J));

 	}

+

+	e = lexexponent(J);

+	if (e < 0)

+		n /= pow(10, -e);

+	else if (e > 0)

+		n *= pow(10, e);

 	if (isidentifierstart(PEEK))

 		jsY_error(J, "number with letter suffix");