1 b2cfc4e2 2003-09-30 devnull #include <lib9.h>
4 b2cfc4e2 2003-09-30 devnull INVAL= 255
7 b2cfc4e2 2003-09-30 devnull static uchar t64d[256] = {
8 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
9 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
10 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL, 62,INVAL,INVAL,INVAL, 63,
11 b2cfc4e2 2003-09-30 devnull 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
12 b2cfc4e2 2003-09-30 devnull INVAL, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
13 b2cfc4e2 2003-09-30 devnull 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,INVAL,INVAL,INVAL,INVAL,INVAL,
14 b2cfc4e2 2003-09-30 devnull INVAL, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
15 b2cfc4e2 2003-09-30 devnull 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,INVAL,INVAL,INVAL,INVAL,INVAL,
16 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
17 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
18 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
19 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
20 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
21 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
22 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,
23 b2cfc4e2 2003-09-30 devnull INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL,INVAL
25 b2cfc4e2 2003-09-30 devnull static char t64e[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
28 b2cfc4e2 2003-09-30 devnull dec64(uchar *out, int lim, char *in, int n)
30 b2cfc4e2 2003-09-30 devnull ulong b24;
31 b2cfc4e2 2003-09-30 devnull uchar *start = out;
32 b2cfc4e2 2003-09-30 devnull uchar *e = out + lim;
33 b2cfc4e2 2003-09-30 devnull int i, c;
37 b2cfc4e2 2003-09-30 devnull while(n-- > 0){
39 b2cfc4e2 2003-09-30 devnull c = t64d[*(uchar*)in++];
40 b2cfc4e2 2003-09-30 devnull if(c == INVAL)
41 b2cfc4e2 2003-09-30 devnull continue;
42 b2cfc4e2 2003-09-30 devnull switch(i){
44 b2cfc4e2 2003-09-30 devnull b24 = c<<18;
47 b2cfc4e2 2003-09-30 devnull b24 |= c<<12;
50 b2cfc4e2 2003-09-30 devnull b24 |= c<<6;
53 b2cfc4e2 2003-09-30 devnull if(out + 3 > e)
54 b2cfc4e2 2003-09-30 devnull goto exhausted;
56 b2cfc4e2 2003-09-30 devnull b24 |= c;
57 b2cfc4e2 2003-09-30 devnull *out++ = b24>>16;
58 b2cfc4e2 2003-09-30 devnull *out++ = b24>>8;
59 b2cfc4e2 2003-09-30 devnull *out++ = b24;
65 b2cfc4e2 2003-09-30 devnull switch(i){
67 b2cfc4e2 2003-09-30 devnull if(out + 1 > e)
68 b2cfc4e2 2003-09-30 devnull goto exhausted;
69 b2cfc4e2 2003-09-30 devnull *out++ = b24>>16;
72 b2cfc4e2 2003-09-30 devnull if(out + 2 > e)
73 b2cfc4e2 2003-09-30 devnull goto exhausted;
74 b2cfc4e2 2003-09-30 devnull *out++ = b24>>16;
75 b2cfc4e2 2003-09-30 devnull *out++ = b24>>8;
78 b2cfc4e2 2003-09-30 devnull exhausted:
79 b2cfc4e2 2003-09-30 devnull return out - start;
83 b2cfc4e2 2003-09-30 devnull enc64(char *out, int lim, uchar *in, int n)
86 b2cfc4e2 2003-09-30 devnull ulong b24;
87 b2cfc4e2 2003-09-30 devnull char *start = out;
88 b2cfc4e2 2003-09-30 devnull char *e = out + lim;
90 b2cfc4e2 2003-09-30 devnull for(i = n/3; i > 0; i--){
91 b2cfc4e2 2003-09-30 devnull b24 = (*in++)<<16;
92 b2cfc4e2 2003-09-30 devnull b24 |= (*in++)<<8;
93 b2cfc4e2 2003-09-30 devnull b24 |= *in++;
94 b2cfc4e2 2003-09-30 devnull if(out + 4 >= e)
95 b2cfc4e2 2003-09-30 devnull goto exhausted;
96 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>18)];
97 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>12)&0x3f];
98 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>6)&0x3f];
99 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24)&0x3f];
102 b2cfc4e2 2003-09-30 devnull switch(n%3){
104 b2cfc4e2 2003-09-30 devnull b24 = (*in++)<<16;
105 b2cfc4e2 2003-09-30 devnull b24 |= (*in)<<8;
106 b2cfc4e2 2003-09-30 devnull if(out + 4 >= e)
107 b2cfc4e2 2003-09-30 devnull goto exhausted;
108 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>18)];
109 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>12)&0x3f];
110 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>6)&0x3f];
111 b2cfc4e2 2003-09-30 devnull *out++ = '=';
114 b2cfc4e2 2003-09-30 devnull b24 = (*in)<<16;
115 b2cfc4e2 2003-09-30 devnull if(out + 4 >= e)
116 b2cfc4e2 2003-09-30 devnull goto exhausted;
117 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>18)];
118 b2cfc4e2 2003-09-30 devnull *out++ = t64e[(b24>>12)&0x3f];
119 b2cfc4e2 2003-09-30 devnull *out++ = '=';
120 b2cfc4e2 2003-09-30 devnull *out++ = '=';
123 b2cfc4e2 2003-09-30 devnull exhausted:
124 b2cfc4e2 2003-09-30 devnull *out = 0;
125 b2cfc4e2 2003-09-30 devnull return out - start;