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+--------+-------------------------+-------------------------+--------+--------+
|00000000| ff 01 00 00 00 5c 43 42 | 54 52 45 45 5c 4c 49 42 |.....\CB|TREE\LIB|
|00000010| 52 41 52 59 5c 47 49 56 | 45 49 44 58 52 2e 43 00 |RARY\GIV|EIDXR.C.|
|00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000050| 00 00 00 1b 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000060| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000080| 2f 2a 20 28 43 29 20 43 | 6f 70 79 72 69 67 68 74 |/* (C) C|opyright|
|00000090| 20 31 39 38 34 2c 38 35 | 2c 38 36 2c 38 37 20 57 | 1984,85|,86,87 W|
|000000a0| 61 6c 74 65 72 20 4c 2e | 20 50 65 61 63 6f 63 6b |alter L.| Peacock|
|000000b0| 20 20 20 41 6c 6c 20 52 | 69 67 68 74 73 20 52 65 |   All R|ights Re|
|000000c0| 73 65 72 76 65 64 20 20 | 20 20 2a 2f 0d 0a 2f 2a |served  |  */../*|
|000000d0| 20 20 67 20 69 20 76 20 | 65 20 69 20 64 20 78 20 |  g i v |e i d x |
|000000e0| 72 20 2e 20 63 20 20 38 | 2f 30 32 2f 38 34 20 20 |r . c  8|/02/84  |
|000000f0| 2a 2f 0d 0a 0d 0a 2f 2a | 2d 2d 2d 2d 2d 2d 2d 2d |*/..../*|--------|
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|00000590| 65 20 22 63 62 74 72 65 | 65 2e 68 22 0d 0a 0d 0a |e "cbtre|e.h"....|
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|00000650| 54 42 4c 4b 48 44 52 20 | 66 72 65 65 73 70 63 62 |TBLKHDR |freespcb|
|00000660| 3b 0d 0a 20 20 20 6c 6f | 6e 67 20 6c 62 75 66 66 |;..   lo|ng lbuff|
|00000670| 20 3d 20 30 4c 3b 20 20 | 20 20 20 20 2f 2a 20 70 | = 0L;  |    /* p|
|00000680| 72 65 76 65 6e 74 20 4c | 61 74 74 69 63 65 20 77 |revent L|attice w|
|00000690| 61 72 6e 69 6e 67 20 2a | 2f 0d 0a 20 20 20 6c 6f |arning *|/..   lo|
|000006a0| 6e 67 20 69 6e 74 20 70 | 6f 73 2c 20 72 65 74 5f |ng int p|os, ret_|
|000006b0| 6c 6f 63 2c 20 6c 73 65 | 65 6b 28 29 3b 0d 0a 20 |loc, lse|ek();.. |
|000006c0| 20 20 63 68 61 72 20 63 | 68 72 62 75 66 5b 73 69 |  char c|hrbuf[si|
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|000006f0| 20 72 65 74 5f 6c 6f 63 | 20 3d 20 30 4c 3b 0d 0a | ret_loc| = 0L;..|
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|00000750| 0a 20 20 20 20 20 20 6c | 6b 20 3d 20 30 3b 0d 0a |.      l|k = 0;..|
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|000007c0| 20 20 20 20 20 20 20 20 | 67 6f 74 6f 20 67 69 76 |        |goto giv|
|000007d0| 5f 30 65 78 69 74 3b 20 | 20 20 20 20 20 20 20 2f |_0exit; |       /|
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|00000840| 79 20 61 6c 73 6f 20 6e | 65 65 64 20 74 6f 20 63 |y also n|eed to c|
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|000008b0| 20 29 20 7b 0d 0a 20 20 | 20 20 20 20 2f 2a 20 61 | ) {..  |    /* a|
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|00000940| 44 4f 53 20 64 6f 65 73 | 20 6e 6f 74 20 61 6c 6c |DOS does| not all|
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|00000970| 20 61 20 66 69 6c 65 2e | 20 20 20 20 20 20 20 20 | a file.|        |
|00000980| 20 2a 2f 0d 0a 2f 2a 20 | 54 68 69 73 20 69 73 20 | */../* |This is |
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|000009d0| 2f 0d 0a 2f 2a 20 69 6e | 64 65 78 20 74 72 65 65 |/../* in|dex tree|
|000009e0| 20 61 6e 64 20 74 68 65 | 20 64 61 74 61 20 72 65 | and the| data re|
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|00000a10| 54 55 50 20 20 20 20 20 | 20 20 20 20 2a 2f 0d 0a |TUP     |    */..|
|00000a20| 2f 2a 20 64 6f 63 75 6d | 65 6e 74 61 74 69 6f 6e |/* docum|entation|
|00000a30| 20 66 6f 72 20 66 75 72 | 74 68 65 72 20 72 65 73 | for fur|ther res|
|00000a40| 74 72 69 63 74 69 6f 6e | 73 20 6f 6e 20 74 68 69 |triction|s on thi|
|00000a50| 73 29 20 69 74 20 62 65 | 63 6f 6d 65 73 20 6e 65 |s) it be|comes ne|
|00000a60| 63 65 73 73 61 72 79 20 | 2a 2f 0d 0a 2f 2a 20 74 |cessary |*/../* t|
|00000a70| 6f 20 70 72 65 2d 65 78 | 74 65 6e 64 20 74 68 65 |o pre-ex|tend the|
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|00000a90| 69 66 20 74 68 65 20 66 | 72 65 65 20 6c 69 73 74 |if the f|ree list|
|00000aa0| 20 69 73 20 65 6d 70 74 | 79 2e 20 20 20 20 20 20 | is empt|y.      |
|00000ab0| 20 20 20 2a 2f 0d 0a 23 | 69 66 20 41 6d 69 67 61 |   */..#|if Amiga|
|00000ac0| 44 4f 53 0d 0a 23 69 66 | 20 50 52 45 5f 45 58 54 |DOS..#if| PRE_EXT|
|00000ad0| 45 4e 44 0d 0a 20 20 20 | 20 20 20 69 66 20 28 28 |END..   |   if ((|
|00000ae0| 63 70 20 3d 20 63 61 6c | 6c 6f 63 28 72 65 63 6c |cp = cal|loc(recl|
|00000af0| 65 6e 2c 20 53 5a 43 48 | 41 52 29 29 20 3d 3d 20 |en, SZCH|AR)) == |
|00000b00| 4e 55 4c 4c 29 0d 0a 20 | 20 20 20 20 20 20 20 20 |NULL).. |        |
|00000b10| 63 6b 65 72 72 6f 72 28 | 2d 20 43 4b 5f 4e 4f 4d |ckerror(|- CK_NOM|
|00000b20| 45 4d 2c 20 22 31 30 35 | 22 29 3b 0d 0a 20 20 20 |EM, "105|");..   |
|00000b30| 20 20 20 69 66 20 28 62 | 74 73 65 65 6b 28 66 64 |   if (b|tseek(fd|
|00000b40| 2c 20 72 65 74 5f 6c 6f | 63 2c 20 72 65 63 6c 65 |, ret_lo|c, recle|
|00000b50| 6e 29 20 3d 3d 20 2d 31 | 29 0d 0a 20 20 20 20 20 |n) == -1|)..     |
|00000b60| 20 20 20 20 63 6b 65 72 | 72 6f 72 28 2d 20 43 4b |    cker|ror(- CK|
|00000b70| 5f 53 45 45 4b 2c 20 22 | 31 30 36 22 29 3b 0d 0a |_SEEK, "|106");..|
|00000b80| 20 20 20 20 20 20 69 66 | 20 28 77 72 69 74 65 28 |      if| (write(|
|00000b90| 66 64 2c 20 63 70 2c 20 | 72 65 63 6c 65 6e 29 20 |fd, cp, |reclen) |
|00000ba0| 3d 3d 20 45 52 52 29 0d | 0a 20 20 20 20 20 20 20 |== ERR).|.       |
|00000bb0| 20 20 63 6b 65 72 72 6f | 72 28 2d 20 43 4b 5f 57 |  ckerro|r(- CK_W|
|00000bc0| 52 49 54 2c 20 22 31 30 | 37 22 29 3b 0d 0a 20 20 |RIT, "10|7");..  |
|00000bd0| 20 20 20 20 46 52 45 45 | 28 63 70 29 3b 0d 0a 23 |    FREE|(cp);..#|
|00000be0| 65 6e 64 69 66 0d 0a 23 | 65 6e 64 69 66 0d 0a 20 |endif..#|endif.. |
|00000bf0| 20 20 7d 0d 0a 20 20 20 | 65 6c 73 65 20 7b 20 20 |  }..   |else {  |
|00000c00| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00000c10| 20 20 20 20 20 20 2f 2a | 20 61 6c 6c 6f 63 20 61 |      /*| alloc a|
|00000c20| 6e 64 20 75 70 64 61 74 | 65 20 66 72 65 65 73 70 |nd updat|e freesp|
|00000c30| 63 62 20 20 20 20 2a 2f | 0d 0a 20 20 20 20 20 20 |cb    */|..      |
|00000c40| 72 65 74 5f 6c 6f 63 20 | 3d 20 66 72 65 65 73 70 |ret_loc |= freesp|
|00000c50| 63 62 2e 66 72 65 65 6c | 73 74 3b 0d 0a 20 20 20 |cb.freel|st;..   |
|00000c60| 20 20 20 2f 2a 20 70 6f | 73 69 74 69 6f 6e 20 70 |   /* po|sition p|
|00000c70| 6f 69 6e 74 65 72 20 66 | 6f 72 20 70 72 65 76 69 |ointer f|or previ|
|00000c80| 6f 75 73 6c 79 20 64 65 | 61 6c 6c 6f 63 61 74 65 |ously de|allocate|
|00000c90| 64 20 72 65 63 6f 72 64 | 73 20 20 20 2a 2f 0d 0a |d record|s   */..|
|00000ca0| 20 20 20 20 20 20 70 6f | 73 20 3d 20 28 66 72 65 |      po|s = (fre|
|00000cb0| 65 73 70 63 62 2e 66 72 | 65 65 6c 73 74 20 2d 20 |espcb.fr|eelst - |
|00000cc0| 31 4c 29 20 2a 20 72 65 | 63 6c 65 6e 3b 0d 0a 20 |1L) * re|clen;.. |
|00000cd0| 20 20 20 20 20 6c 6b 20 | 3d 20 30 3b 0d 0a 20 20 |     lk |= 0;..  |
|00000ce0| 20 20 20 20 77 68 69 6c | 65 20 28 6c 6f 63 6b 75 |    whil|e (locku|
|00000cf0| 6e 6c 6b 28 66 64 2c 20 | 70 6f 73 2c 20 72 65 63 |nlk(fd, |pos, rec|
|00000d00| 6c 65 6e 2c 20 4c 4f 43 | 4b 52 29 20 21 3d 20 31 |len, LOC|KR) != 1|
|00000d10| 29 0d 0a 20 20 20 20 20 | 20 20 20 20 69 66 20 28 |)..     |    if (|
|00000d20| 2b 2b 6c 6b 20 3e 20 48 | 44 52 54 52 59 53 29 7b |++lk > H|DRTRYS){|
|00000d30| 0d 0a 20 20 20 20 20 20 | 20 20 20 20 20 20 72 65 |..      |      re|
|00000d40| 74 5f 6c 6f 63 20 3d 20 | 30 4c 3b 0d 0a 20 20 20 |t_loc = |0L;..   |
|00000d50| 20 20 20 20 20 20 20 20 | 20 67 6f 74 6f 20 67 69 |        | goto gi|
|00000d60| 76 5f 31 65 78 69 74 3b | 20 20 2f 2a 20 69 2e 65 |v_1exit;|  /* i.e|
|00000d70| 2e 20 75 6e 61 62 6c 65 | 20 74 6f 20 6c 6f 63 6b |. unable| to lock|
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+--------+-------------------------+-------------------------+--------+--------+