[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | fcnote.c -- MIDAS-VII note edit -- find complete note
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| 4 | Version 1 -- 1988-05-17 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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[b28a12e] | 8 | #include "ram.h"
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[f40a309] | 9 |
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| 10 | #define TO_LFT (TO_BAK + 1)
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| 11 |
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| 12 | /*
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| 13 | =============================================================================
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| 14 | fcnote() -- find complete note
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| 15 |
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| 16 | Arguments:
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| 17 |
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| 18 | grp group number
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| 19 | tnote note number
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| 20 |
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| 21 | ctime cursor time to search from
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| 22 |
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| 23 | Returns:
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| 24 |
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| 25 | E_NULL couldn't find the note
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| 26 | ptr pointer to the begin event for the note
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| 27 |
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| 28 | p_nbeg pointer to note begin event
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| 29 | p_nend pointer to note end event
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| 30 | t_note duration of the note
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| 31 | =============================================================================
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| 32 | */
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| 33 |
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[7258c6a] | 34 | struct n_entry *fcnote(int16_t grp, int16_t tnote)
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[f40a309] | 35 | {
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| 36 | register struct n_entry *bp, *ep;
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[7258c6a] | 37 | register int16_t en, eg, et;
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| 38 | int32_t t_left;
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[f40a309] | 39 |
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| 40 | /* setup initial search parameters */
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| 41 |
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| 42 | bp = (struct n_entry *)ep_adj(p_cur, 0, ctime); /* cursor loc */
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| 43 | t_left = t_cur - TO_LFT; /* time at left edge of screen */
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| 44 | p_nbeg = (struct n_entry *)E_NULL; /* no begin yet */
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| 45 | p_nend = (struct n_entry *)E_NULL; /* no end yet */
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| 46 | t_note = 0L; /* no duration yet */
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| 47 |
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| 48 | FOREVER { /* scan left from cursor */
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| 49 |
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| 50 | et = 0x007F & bp->e_type;
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| 51 | en = bp->e_note;
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| 52 | eg = bp->e_group;
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| 53 |
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| 54 | if ((bp->e_time LT t_left) OR (et EQ EV_SCORE)) {
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| 55 |
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| 56 | /* done -- can't see begin, or note not there */
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| 57 |
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| 58 | return(E_NULL);
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| 59 |
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| 60 | } else if ((et EQ EV_NEND) AND (en EQ tnote) AND (eg EQ grp)) {
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| 61 |
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| 62 | /* done -- hit note end first -- notes overlap */
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| 63 |
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| 64 | return(E_NULL);
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[fa38804] | 65 |
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[f40a309] | 66 | } else if ((et EQ EV_NBEG) AND (en EQ tnote) AND (eg EQ grp)) {
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| 67 |
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| 68 | /* found note begin -- possible note starting at bp */
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| 69 |
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| 70 | ep = bp->e_fwd; /* scan to right of begin */
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| 71 |
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| 72 | FOREVER { /* scan right from note begin */
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| 73 |
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| 74 | et = 0x007F & ep->e_type; /* event type */
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| 75 | en = ep->e_note; /* note */
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| 76 | eg = ep->e_group; /* group */
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| 77 |
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| 78 | if ((et EQ EV_NBEG) AND (en EQ tnote) AND
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| 79 | (eg EQ grp)) {
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| 80 |
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| 81 | /* hit note begin first -- done -- notes overlap */
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| 82 |
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| 83 | return(E_NULL);
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[fa38804] | 84 |
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[f40a309] | 85 | } else if ((et EQ EV_NEND) AND (en EQ tnote) AND
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| 86 | (eg EQ grp)) {
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| 87 |
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| 88 | /* hit note end -- done -- found complete note */
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| 89 |
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| 90 | p_nbeg = bp; /* note begin */
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| 91 | p_nend = ep; /* note end */
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| 92 | t_note = ep->e_time - bp->e_time;
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| 93 | return(bp);
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| 94 |
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| 95 | } else if (et EQ EV_FINI) {
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| 96 |
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| 97 | /* hit score end -- done -- can't find end */
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| 98 |
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| 99 | return(E_NULL);
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| 100 | }
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| 101 |
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| 102 | ep = ep->e_fwd; /* scan right */
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| 103 |
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| 104 | } /* end FOREVER */
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| 105 |
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| 106 | } /* end if */
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| 107 |
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| 108 | bp = bp->e_bak; /* scan left */
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| 109 |
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| 110 | } /* end FOREVER */
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| 111 | }
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[6262b5c] | 112 |
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