RanchiMall/fcoin
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faster negative script nums.

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Christopher Jeffrey 2016-05-15 22:18:33 -07:00
parent ab68e23238
commit c6ccb0fccf
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GPG Key ID: 8962AB9DE6666BBD
1 changed files with 15 additions and 2 deletions
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17
lib/bcoin/script.js
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@ -1913,8 +1913,9 @@ Script.num = function num(value, flags, size) {
// 0x80, remove it from the result's msb and return // 0x80, remove it from the result's msb and return
// a negative. // a negative.
if (value[value.length - 1] & 0x80) { if (value[value.length - 1] & 0x80) {
n = new bn(0x80).ushln(8 * (value.length - 1)).notn(64); // n = new bn(0x80).ushln(8 * (value.length - 1)).notn(64);
return result.uand(n).neg(); // return result.uand(n).neg();
result.setn((value.length * 8) - 1, 0).ineg();
} }
return result; return result;
@ -1962,8 +1963,20 @@ Script.array = function(value) {
// interpreted as a negative when // interpreted as a negative when
// converting to an integral. // converting to an integral.
// neg = value.cmpn(0) < 0;
// if (value.testn((value.byteLength() * 8) - 1)) {
// result = value.toArray('le');
// result.push(neg ? 0x80 : 0);
// return new Buffer(result);
// }
// result = value.toBuffer('le');
// if (neg)
// result[result.length - 1] |= 0x80;
// return result;
neg = value.cmpn(0) < 0; neg = value.cmpn(0) < 0;
result = value.toArray('le'); result = value.toArray('le');
if (result[result.length - 1] & 0x80) if (result[result.length - 1] & 0x80)
result.push(neg ? 0x80 : 0); result.push(neg ? 0x80 : 0);
else if (neg) else if (neg)