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Fix of Infinity handling

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This commit is contained in:
Andrew 2020-11-02 07:51:40 -08:00
parent e682f63cd0
commit 95e55eb1cb
2 changed files with 19 additions and 5 deletions
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2
quickjs.c
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@ -47540,7 +47540,7 @@ static const JSCFunctionListEntry js_global_funcs[] = {
JS_CFUNC_MAGIC_DEF("encodeURIComponent", 1, js_global_encodeURI, 1 ),
JS_CFUNC_DEF("escape", 1, js_global_escape ),
JS_CFUNC_DEF("unescape", 1, js_global_unescape ),
JS_PROP_DOUBLE_DEF("Infinity", 1.0 / 0.0, 0 ),
JS_PROP_DOUBLE_DEF("Infinity", INFINITY, 0 ),
JS_PROP_DOUBLE_DEF("NaN", NAN, 0 ),
JS_PROP_UNDEFINED_DEF("undefined", 0 ),

22
quickjs.h
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@ -132,16 +132,24 @@ typedef struct JSRefCountHeader {
#define JS_MKVAL(tag, val) (((uint64_t)(0xF & tag) << 48) | (uint32_t)(val))
#define JS_MKPTR(tag, ptr) (((uint64_t)(0xF & tag) << 48) | ((uint64_t)(ptr) & 0x0000FFFFFFFFFFFFull))
#define JS_NAN JS_MKVAL(JS_TAG_FLOAT64,1)
#define JS_NAN JS_MKVAL(JS_TAG_FLOAT64,0)
#define JS_INFINITY_NEGATIVE JS_MKVAL(JS_TAG_FLOAT64,1)
#define JS_INFINITY_POSITIVE JS_MKVAL(JS_TAG_FLOAT64,2)
static inline double JS_VALUE_GET_FLOAT64(JSValue v)
{
if (v > 0xFFFFFFFFFFFFFull) {
union { JSValue v; double d; } u;
if (v == JS_NAN)
return JS_FLOAT64_NAN;
u.v = ~v;
return u.d;
}
else if (v == JS_NAN)
return JS_FLOAT64_NAN;
else if (v == JS_INFINITY_POSITIVE)
return INFINITY;
else
return -INFINITY;
}
static inline JSValue __JS_NewFloat64(JSContext *ctx, double d)
{
@ -149,8 +157,14 @@ typedef struct JSRefCountHeader {
JSValue v;
u.d = d;
/* normalize NaN */
if (js_unlikely((u.u64 & 0x7ff0000000000000) == 0x7ff0000000000000))
if (js_unlikely((u.u64 & 0x7ff0000000000000) == 0x7ff0000000000000)) {
if( isnan(d))
v = JS_NAN;
else if (d < 0.0)
v = JS_INFINITY_NEGATIVE;
else
v = JS_INFINITY_POSITIVE;
}
else
v = ~u.u64;
return v;