src/sha_dev.js
function safeAdd_32_2(a, b)
	{
		var lsw = (a & 0xFFFF) + (b & 0xFFFF),
			msw = (a >>> 16) + (b >>> 16) + (lsw >>> 16);

		return ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
	}
function safeAdd_32_2(a, b)
	{
		var lsw = (a & 0xFFFF) + (b & 0xFFFF),
			msw = (a >>> 16) + (b >>> 16) + (lsw >>> 16);

		return ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
	}
function safeAdd_32_2 ( a , b ) { var lsw = ( a & 0xFFFF ) + ( b & 0xFFFF ) , msw = ( a >>> 16 ) + ( b >>> 16 ) + ( lsw >>> 16 ) ; return ( ( msw & 0xFFFF ) << 16 ) | ( lsw & 0xFFFF ) ; }
Add two 32-bit integers, wrapping at 2^32. This uses 16-bit operations
internally to work around bugs in some JS interpreters.

@private
@param {number} a The first 32-bit integer argument to be added
@param {number} b The second 32-bit integer argument to be added
@return {number} The sum of a + b
Add two 32 - bit integers wrapping at 2^32 . This uses 16 - bit operations internally to work around bugs in some JS interpreters .