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/ IRIX Base Documentation 2002 November / SGI IRIX Base Documentation 2002 November.iso / usr / share / catman / p_man / cat3 / ifl / TIFFswab.z / TIFFswab
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Text File  |  2002-10-03  |  4.0 KB  |  67 lines
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  4. SSSSWWWWAAAABBBB((((3333TTTT))))          IIIImmmmaaaaggggeeee FFFFoooorrrrmmmmaaaatttt LLLLiiiibbbbrrrraaaarrrryyyy CCCC++++++++ RRRReeeeffffeeeerrrreeeennnncccceeee MMMMaaaannnnuuuuaaaallll           SSSSWWWWAAAABBBB((((3333TTTT))))
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  8. NNNNAAAAMMMMEEEE
  9.      TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFFSwabArrayOfShort,
  10.      TIFFSwabArrayOfLong - byte- and bit-swapping routines
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  12. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  13.      ####iiiinnnncccclllluuuuddddeeee <<<<ttttiiiiffffffffiiiioooo....hhhh>>>>
  14.      ccccoooonnnnsssstttt uuuunnnnssssiiiiggggnnnneeeedddd cccchhhhaaaarrrr**** TTTTIIIIFFFFFFFFGGGGeeeettttBBBBiiiittttRRRReeeevvvvTTTTaaaabbbblllleeee((((iiiinnnntttt rrrreeeevvvveeeerrrrsssseeeedddd))));;;;
  15.      vvvvooooiiiidddd TTTTIIIIFFFFFFFFRRRReeeevvvveeeerrrrsssseeeeBBBBiiiittttssss((((uuuu____cccchhhhaaaarrrr**** ddddaaaattttaaaa,,,, uuuunnnnssssiiiiggggnnnneeeedddd lllloooonnnngggg nnnnbbbbyyyytttteeeessss))))
  16.      vvvvooooiiiidddd TTTTIIIIFFFFFFFFSSSSwwwwaaaabbbbSSSShhhhoooorrrrtttt((((uuuuiiiinnnntttt11116666**** ddddaaaattttaaaa))))
  17.      vvvvooooiiiidddd TTTTIIIIFFFFFFFFSSSSwwwwaaaabbbbLLLLoooonnnngggg((((uuuuiiiinnnntttt33332222**** ddddaaaattttaaaa))))
  18.      vvvvooooiiiidddd TTTTIIIIFFFFFFFFSSSSwwwwaaaabbbbAAAArrrrrrrraaaayyyyOOOOffffSSSShhhhoooorrrrtttt((((uuuuiiiinnnntttt11116666**** ddddaaaattttaaaa,,,, uuuunnnnssssiiiiggggnnnneeeedddd lllloooonnnngggg nnnnsssshhhhoooorrrrttttssss))))
  19.      vvvvooooiiiidddd TTTTIIIIFFFFFFFFSSSSwwwwaaaabbbbAAAArrrrrrrraaaayyyyOOOOffffLLLLoooonnnngggg((((uuuuiiiinnnntttt33332222**** ddddaaaattttaaaa,,,, uuuunnnnssssiiiiggggnnnneeeedddd lllloooonnnngggg nnnnlllloooonnnnggggssss))))
  20.  
  21. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  22.      The following routines are used by the library to swap 16- and 32-bit
  23.      data and to reverse the order of bits in bytes.
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  25.      _T_I_F_F_S_w_a_b_S_h_o_r_t and _T_I_F_F_S_w_a_b_L_o_n_g swap the bytes in a single 16-bit and 32-
  26.      bit item, respectively.  _T_I_F_F_S_w_a_b_A_r_r_a_y_O_f_S_h_o_r_t and _T_I_F_F_S_w_a_b_A_r_r_a_y_O_f_L_o_n_g
  27.      swap the bytes in an array of 16-bit and 32-bit items, respectively.
  28.  
  29.      _T_I_F_F_R_e_v_e_r_s_e_B_i_t_s replaces each byte in _d_a_t_a with the equivalent bit-
  30.      reversed value.  This operation is done with a lookup table,
  31.      _T_I_F_F_B_i_t_R_e_v_T_a_b_l_e which is declared public.  A second table,
  32.      _T_I_F_F_N_o_B_i_t_R_e_v_T_a_b_l_e is also declared public; it is a lookup table that can
  33.      be used as an _i_d_e_n_t_i_t_y _f_u_n_c_t_i_o_n; i.e.  _T_I_F_F_N_o_B_i_t_R_e_v_T_a_b_l_e[_n] == _n.
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  35. DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
  36.      None.
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  38. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  39.      _l_i_b_t_i_f_f(3T),
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  63.                                                                         PPPPaaaaggggeeee 1111
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