Martin@438: // empty line needed here
Martin@445: Number.prototype.add32 = function(x) { return (this + x) | 0; };
Martin@445: Number.prototype.sub32 = function(x) { return (this - x) | 0; };
Martin@445: Number.prototype.mul32 = function(x) { 
Martin@445:     return (((this * (x >> 16)) << 16) + this * (x & 0xFFFF)) | 0;
Martin@438: };
Martin@439: 
Martin@445: Number.prototype.toInt8 = function()  { return (this << 24) >> 24; };
Martin@582: Number.prototype.toInt16 = function() { return (this << 16) >> 16; };
Martin@582: 
Martin@582: var Long = function(low, hi) {
Martin@582:     this.low = low;
Martin@582:     this.hi = hi;
Martin@582: };
Martin@582: 
Martin@582: function LongFromNumber(x) {
Martin@582:     return new Long(x % 0xFFFFFFFF, Math.floor(x / 0xFFFFFFFF));
Martin@582: };
Martin@582: 
Martin@582: function MakeLong(x) {
Martin@582:     if ((x.hi == undefined) && (x.low == undefined)) {
Martin@582:         return LongFromNumber(x);
Martin@582:     }
Martin@582:     return x;
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.toInt32 = function() { return this.low | 0; };
Martin@582: Long.prototype.toFP = function() { return this.hi * 0xFFFFFFFF + this.low; };
Martin@582: 
Martin@582: Long.prototype.toString = function() {
Martin@582:     return String(this.toFP());
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.valueOf = function() {
Martin@582:     return this.toFP();
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.compare64 = function(x) {
Martin@582:     if (this.hi == x.hi) {
Martin@582:         return (this.low == x.low) ? 0 : ((this.low < x.low) ? -1 : 1);
Martin@582:     }
Martin@582:     return (this.hi < x.hi) ? -1 : 1;
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.add64 = function(x) {
Martin@582:     low = this.low + x.low;
Martin@582:     carry = 0;
Martin@582:     if (low > 0xFFFFFFFF) {
Martin@582:         carry = 1;
Martin@582:         low -= 0xFFFFFFFF;
Martin@582:     }
Martin@582:     hi = (this.hi + x.hi + carry) & 0xFFFFFFFF;
Martin@582:     return new Long(low, hi);
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.div64 = function(x) {
Martin@582:     return LongFromNumber(Math.floor(this.toFP() / x.toFP()));
Martin@582: };
Martin@582: 
Martin@582: Long.prototype.shl64 = function(x) {
Martin@582:     if (x > 32) {
Martin@582:         hi = (this.low << (x - 32)) & 0xFFFFFFFF;
Martin@582:         low = 0;
Martin@582:     } else {
Martin@582:         hi = (this.hi << x) & 0xFFFFFFFF;
Martin@582:         low_reminder = this.low >> x;
Martin@582:         hi |= low_reminder;
Martin@582:         low = this.low << x;
Martin@582:     }
Martin@582:     return new Long(low, hi);
Martin@582: };