source: buchla-68k/ram/delnote.c

Last change on this file was 8d0af8a, checked in by Thomas Lopatic <thomas@…>, 6 years ago

Fixed mixed-type pointer comparisons.
  • Property mode set to 100644
File size: 5.1 KB
Line 
1/*
2 =============================================================================
3 delnote.c -- MIDAS-VII note deletion
4 Version 16 -- 1988-10-27 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#include "ram.h"
9
10#define TO_LFT (TO_BAK + 1)
11
12/*
13 =============================================================================
14 delnote() -- delete a note
15 =============================================================================
16*/
17
18int16_t delnote(void)
19{
20 register struct n_entry *bp, *cp, *ep;
21 register int32_t t_left;
22 register int16_t tnote, grp;
23 register int16_t runtag, scantag;
24 int16_t disptag;
25
26 disptag = FALSE; /* nothing changed yet */
27
28 if (NOT recsw) /* must be in record mode */
29 return(FAILURE);
30
31 /* convert cursor position to note number and time */
32
33 if (pix2mid())
34 goto notnote;
35
36 ++cflag;
37 tnote = cnote;
38 t_left = t_cur - TO_LFT;
39 cp = (struct n_entry *)frfind(ctime, 0);
40
41
42 while (cflag--) { /* handle both naturals and accidentals */
43
44 for (grp = 0; grp < 12; grp++) { /* for each group ... */
45
46 if ((grpstat[grp] EQ 0) OR /* ... enabled and ... */
47 (grpmode[grp] NE 2)) /* ... in record mode: */
48 continue;
49
50 runtag = TRUE;
51 bp = cp; /* start at cursor */
52
53 while (runtag) { /* scan left from cursor until: */
54
55 if ((bp->e_time LT t_left) OR
56 (bp->e_type EQ EV_SCORE)) { /* left edge */
57
58 /* done -- nothing to delete */
59
60 runtag = FALSE;
61 continue;
62
63 } else if ((bp->e_type EQ EV_NEND) AND
64 (bp->e_note EQ tnote) AND
65 (bp->e_group EQ grp)) { /* note end */
66
67 /* done -- overlap */
68
69 runtag = FALSE;
70 continue;
71
72 } else if ((bp->e_type EQ EV_NBEG) AND
73 (bp->e_note EQ tnote) AND
74 (bp->e_group EQ grp)) { /* note begin */
75
76 /* possible deletion */
77
78 /* scan right from note begin until: */
79
80 ep = (struct n_entry *)bp->e_fwd;
81 scantag = TRUE;
82
83 while (scantag) {
84
85 /* note begin -- done -- overlap */
86
87 if ((ep->e_type EQ EV_NBEG) AND
88 (ep->e_note EQ tnote) AND
89 (ep->e_group EQ grp)) {
90
91 scantag = FALSE;
92 runtag = FALSE;
93 continue;
94
95 } else if ((ep->e_type EQ EV_NEND) AND
96 (ep->e_note EQ tnote) AND
97 (ep->e_group EQ grp)) {
98
99 /* note end */
100
101 /* delete note end */
102
103 if (cp EQ ep)
104 cp = (struct n_entry *)cp->e_bak;
105
106 if (p_ctr EQ (struct s_entry *)ep)
107 p_ctr = p_ctr->e_bak;
108
109 if (p_bak EQ (struct s_entry *)ep)
110 p_bak = p_bak->e_bak;
111
112 if (p_fwd EQ (struct s_entry *)ep)
113 p_fwd = p_fwd->e_bak;
114
115 if (p_cur EQ (struct s_entry *)ep)
116 p_cur = p_cur->e_bak;
117
118 e_del(e_rmv((struct s_entry *)ep));
119
120 /* delete note begin */
121
122 if (cp EQ bp)
123 cp = (struct n_entry *)cp->e_bak;
124
125 if (p_ctr EQ (struct s_entry *)bp)
126 p_ctr = p_ctr->e_bak;
127
128 if (p_bak EQ (struct s_entry *)bp)
129 p_bak = p_bak->e_bak;
130
131 if (p_fwd EQ (struct s_entry *)bp)
132 p_fwd = p_fwd->e_bak;
133
134 if (p_cur EQ (struct s_entry *)bp)
135 p_cur = p_cur->e_bak;
136
137 e_del(e_rmv((struct s_entry *)bp));
138
139 disptag = TRUE;
140 runtag = FALSE;
141 scantag = FALSE;
142 continue;
143
144 } else if (ep->e_type EQ EV_FINI) {
145
146 /* score end */
147
148 /* delete note begin */
149
150 if (cp EQ bp)
151 cp = (struct n_entry *)cp->e_bak;
152
153 if (p_ctr EQ (struct s_entry *)bp)
154 p_ctr = p_ctr->e_bak;
155
156 if (p_bak EQ (struct s_entry *)bp)
157 p_bak = p_bak->e_bak;
158
159 if (p_fwd EQ (struct s_entry *)bp)
160 p_fwd = p_fwd->e_bak;
161
162 if (p_cur EQ (struct s_entry *)bp)
163 p_cur = p_cur->e_bak;
164
165 e_del(e_rmv((struct s_entry *)bp));
166
167 disptag = TRUE;
168 runtag = FALSE;
169 scantag = FALSE;
170 continue;
171 }
172
173 /* scan right */
174
175 ep = (struct n_entry *)ep->e_fwd;
176
177 } /* end while (scantag) */
178
179 } /* end if */
180
181 /* scan left */
182
183 bp = (struct n_entry *)bp->e_bak;
184
185 } /* end while (runtag) */
186
187 } /* end for (grp) */
188
189 /* handle accidentals */
190
191 if (ac_code EQ N_SHARP)
192 ++tnote; /* treat accidentals as sharps */
193 else
194 --tnote; /* treat accidentals as flats */
195
196 } /* end while (cflag) */
197
198notnote: /* jumped to if pix2mid() returned FAILURE (not on a note) */
199
200 /* check for a bar marker delete operation */
201
202 if (NOT disptag) { /* if no notes were deleted, try for a bar */
203
204 if (ctime < 0L) /* time has to be good */
205 return(FAILURE);
206
207 /* search current time for a bar marker - delete any found */
208
209 ep = (struct n_entry *)ep_adj(p_cur, 1, ctime);
210
211 while (ctime EQ ep->e_time) {
212
213 bp = (struct n_entry *)ep->e_fwd;
214
215 if (EV_BAR EQ ep->e_type) {
216
217 if (ep EQ (struct n_entry *)p_bak)
218 p_bak = p_bak->e_bak;
219
220 if (ep EQ (struct n_entry *)p_ctr)
221 p_ctr = p_ctr->e_bak;
222
223 if (ep EQ (struct n_entry *)p_cur)
224 p_cur = p_cur->e_bak;
225
226 if (ep EQ (struct n_entry *)p_fwd)
227 p_fwd = p_fwd->e_bak;
228
229 e_del(e_rmv((struct s_entry *)ep));
230 disptag = TRUE;
231 }
232
233 ep = bp;
234 }
235 }
236
237 if (disptag)
238 sc_refr(t_cur);
239
240 return(disptag ? SUCCESS : FAILURE);
241}
242
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