Macros de C en JavaScript

//-----------------------------------------------------------------------------------------------
// Engines       JavaScript 1+
//               JScript    1+
// Environments  NN2+ IE3+ WSH1+ MOZILLA1+ SAFARI1+
//-----------------------------------------------------------------------------------------------

function makeWORD (l, h) { return  l & 0xFF | (h & 0xFF) << 8;                                  } // 0-255 * 2
function loBYTE   (n)    { return  n & 0xFF;                                                    }
function hiBYTE   (n)    { return (n >> 8) & 0xFF;                                              }

//-----------------------------------------------------------------------------------------------

function make3BYTE (a, b, c)    { return makeWORD(a, b) | (c & 0xFF) << 16;                     } // 0-255 * 3
function RGB       (r, g, b)    { return make3BYTE(r, g, b);                                    }
function makeQBYTE (a, b, c, d) { return make3BYTE(a, b, c) | (d & 0xFF) << 24;                 } // 0-255 * 4
function RGBA      (r, g, b, a) { return makeQBYTE(r, g, b, a);                                 }
function h3BYTE    (n)          { return (n >> 16) & 0xFF;                                      }
function h4BYTE    (n)          { return (n >> 24) & 0xFF;                                      }
function getRValue (n)          { return loBYTE(n);                                             }
function getGValue (n)          { return hiBYTE(n);                                             }
function getBValue (n)          { return h3BYTE(n);                                             }
function getAValue (n)          { return h4BYTE(n);                                             }

//-----------------------------------------------------------------------------------------------

function makeLONG (l, h)   { return l & 0xFFFF | (h & 0xFFFF) << 16;                            } // 0-65535 * 2
function loWORD   (n)      { return  n & 0xFFFF;                                                }
function hiWORD   (n)      { return (n >> 16) & 0xFFFF;                                         }