1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
include <mach.h>
# XT_BAITARRAY -- Routines to manage a 2D bit array.
# One use for this is to hold a large boolean mask in the minimum amount of
# memory for random I/O.
define BA_LEN 6 # Length of structure
define BA_NC Memi[$1] # Number of columns
define BA_NL Memi[$1+1] # Number of lines
define BA_NBE Memi[$1+2] # Number of bits per element
define BA_NEW Memi[$1+3] # Number of elements per word
define BA_MAX Memi[$1+4] # Maximum value
define BA_DATA Memi[$1+5] # Data pointer
# XT_BAOPEN -- Open the bit array by allocating a structure and memory.
pointer procedure xt_baopen (nc, nl, maxval)
int nc, nl #I Size of bit array to open
int maxval #I Maximum value
pointer ba #R Bitarray structure
int nbits
errchk calloc
begin
nbits = SZB_CHAR * SZ_INT * 8
call calloc (ba, BA_LEN, TY_STRUCT)
BA_NC(ba) = nc
BA_NL(ba) = nl
BA_MAX(ba) = maxval
BA_NBE(ba) = int (log(real(maxval))/log(2.)+1.)
BA_NBE(ba) = min (BA_NBE(ba), nbits)
BA_NEW(ba) = nbits / BA_NBE(ba)
call calloc (BA_DATA(ba),
(BA_NC(ba) * BA_NL(ba) + BA_NEW(ba) - 1) / BA_NEW(ba), TY_INT)
return (ba)
end
# XT_BACLOSE -- Close the bit array by freeing memory.
procedure xt_baclose (ba)
pointer ba #U Bitarray structure
begin
call mfree (BA_DATA(ba), TY_INT)
call mfree (ba, TY_STRUCT)
end
# XT_BAPS -- Put short data.
procedure xt_baps (ba, c, l, data, n)
pointer ba #I Bitarray structure
int c, l #I Starting element
short data[n] #I Input data array
int n #I Number of data values
int i, j, k, m, val
begin
k = (c - 1) + BA_NC(ba) * (l - 1) - 1
do m = 1, n {
k = k + 1
j = k / BA_NEW(ba)
i = BA_NBE(ba) * mod (k, BA_NEW(ba)) + 1
val = min (data[m], BA_MAX(ba))
call bitpak (val, Memi[BA_DATA(ba)+j], i, BA_NBE(ba))
}
end
# XT_BAGS -- Get short data.
procedure xt_bags (ba, c, l, data, n)
pointer ba #I Bitarray structure
int c, l #I Starting element
short data[n] #I Output data array
int n #I Number of data values
int i, j, k, m, bitupk()
begin
k = (c - 1) + BA_NC(ba) * (l - 1) - 1
do m = 1, n {
k = k + 1
j = k / BA_NEW(ba)
i = BA_NBE(ba) * mod (k, BA_NEW(ba)) + 1
data[m] = bitupk (Memi[BA_DATA(ba)+j], i, BA_NBE(ba))
}
end
# XT_BAPI -- Put integer data.
procedure xt_bapi (ba, c, l, data, n)
pointer ba #I Bitarray structure
int c, l #I Starting element
int data[n] #I Input data array
int n #I Number of data values
int i, j, k, m, val
begin
k = (c - 1) + BA_NC(ba) * (l - 1) - 1
do m = 1, n {
k = k + 1
j = k / BA_NEW(ba)
i = BA_NBE(ba) * mod (k, BA_NEW(ba)) + 1
val = min (data[m], BA_MAX(ba))
call bitpak (val, Memi[BA_DATA(ba)+j], i, BA_NBE(ba))
}
end
# XT_BAGI -- Get integer data.
procedure xt_bagi (ba, c, l, data, n)
pointer ba #I Bitarray structure
int c, l #I Starting element
int data[n] #I Output data array
int n #I Number of data values
int i, j, k, m, bitupk()
begin
k = (c - 1) + BA_NC(ba) * (l - 1) - 1
do m = 1, n {
k = k + 1
j = k / BA_NEW(ba)
i = BA_NBE(ba) * mod (k, BA_NEW(ba)) + 1
data[m] = bitupk (Memi[BA_DATA(ba)+j], i, BA_NBE(ba))
}
end
|
