1 #include	<u.h>
2 #include	<libc.h>
3 #include	<libg.h>
4 #include	<bio.h>
5 #include	"hdr.h"
6 
7 /* quwei encoding for gb */
8 
9 Bitmap *
10 qreadbits(char *file, int n, long *chars, int size, uchar *bits, int **doneptr)
11 {
12 	Bitmap *bm;
13 	Biobuf *bf;
14 	char *p;
15 	long kmin, kmax;
16 	int i, j, byt;
17 	int nch;
18 	long c;
19 	uchar *b;
20 	int *done;
21 	uchar *nbits;
22 	static int dig[256] = {
23 	['0'] 0, ['1'] 1, ['2'] 2, ['3'] 3, ['4'] 4, ['5'] 5, ['6'] 6, ['7'] 7,
24 	['8'] 8, ['9'] 9, ['a'] 10, ['b'] 11, ['c'] 12, ['d'] 13, ['e'] 14, ['f'] 15,
25 	};
26 
27 	bf = Bopen(file, OREAD);
28 	if(bf == 0){
29 		fprint(2, "%s: %s: %r\n", argv0, file);
30 		exits("bitfile open error");
31 	}
32 	done = (int *)malloc(n*sizeof(done[0]));
33 	if(done == 0){
34 		fprint(2, "%s: malloc error (%d bytes)\n", argv0, n);
35 		exits("malloc error");
36 	}
37 	*doneptr = done;
38 	memset(done, 0, n*sizeof(done[0]));
39 	kmin = 65536;
40 	kmax = 0;
41 	for(i = 0; i < n; i++){
42 		c = chars[i];
43 		if(kmin > c)
44 			kmin = c;
45 		if(kmax < c)
46 			kmax = c;
47 	}
48 	nch = 0;
49 	byt = size/8;
50 	while(p = (char *)Brdline(bf, '\n')){
51 		c = (p[0]-'0')*1000 + (p[1]-'0')*100 + (p[2]-'0')*10 + (p[3]-'0');
52 		if((c < kmin) || (c > kmax))
53 			continue;
54 		for(i = 0; i < n; i++)
55 			if(c == chars[i]){
56 				nch++;
57 				done[i] = 1;
58 				p += 5;
59 				b = bits + i*byt;
60 				for(i = 0; i < size; i++){	/* rows */
61 					for(j = 0; j < byt; j++){
62 						*b++ = (dig[*p]<<4) | dig[p[1]];
63 						p += 2;
64 					}
65 					b += (n-1)*byt;
66 				}
67 				break;
68 			}
69 	}
70 	nbits = (uchar *)malloc(nch*byt*size);
71 	if(nbits == 0){
72 		fprint(2, "%s: malloc error (%d bytes)\n", argv0, nch*byt);
73 		exits("malloc error");
74 	}
75 	c = 0;
76 	for(i = 0; i < n; i++)
77 		if(done[i]){
78 			for(j = 0; j < size; j++)
79 				memmove(nbits+c*byt+j*nch*byt, bits+i*byt+j*n*byt, byt);
80 			c++;
81 		}
82 	bm = balloc((Rectangle){(Point){0, 0}, (Point){nch*size, size}}, 0);
83 	if(bm == 0){
84 		fprint(2, "%s: balloc failure\n", argv0);
85 		exits("balloc failure");
86 	}
87 	wrbitmap(bm, 0, size, nbits);
88 	for(i = 0; i < n; i++)
89 		if(done[i] == 0){
90 			/*fprint(2, "char 0x%x (%d) not found\n", chars[i], chars[i]);/**/
91 		}
92 	return(bm);
93 }