代码里面太多三元操作符“?”,不太了解js的优先级,麻烦将其用c语言风格转话一下,不必转成c的函数,分开一行一行就行。
var _ = t.charCodeAt(v);
_ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
g[y++] = _ >> 18 | 240,
g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
g[y++] = _ >> 6 & 63 | 128),
g[y++] = 63 & _ | 128);
var _ = t.charCodeAt(v);
_ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
g[y++] = _ >> 18 | 240,
g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
g[y++] = _ >> 6 & 63 | 128),
g[y++] = 63 & _ | 128);