TGA loader in LISP

`class` macro automatically generates everything

class Tga
  idLength   = U1  // 00h Size of Image ID field
  cmapType   = U1  // 01h Color map type
  imageType  = U1  // 02h Image type code
  cmapStart  = U2  // 03h Color map origin
  cmapLength = U2  // 05h Color map length
  cmapDepth  = U1  // 07h Depth of color map entries
  xOffset    = U2  // 08h X origin of image
  yOffset    = U2  // 0Ah Y origin of image
  width      = U2  // 0Ch Width of image
  height     = U2  // 0Eh Heigth of image
  bpp        = U1  // 10h Image pixel size
  descriptor = U1  // 11h Image descriptor byte
  idField    = idLength++U1
  cmap       = cmapLength++U1
  bmap       = (width*height*bpp%8)++U1

>>2
>>3
Because there's no code. On the imageboard from whence this amusing person came it feeds us with shopped screenshots of some unearthly REPL at least, but you're not gonna see even those.