| /* |
| decode_cvs.c |
| |
| Concurrent Versions System. |
| |
| Copyright (c) 2000 Dug Song <dugsong@monkey.org> |
| |
| $Id: decode_cvs.c,v 1.5 2000/11/15 05:54:51 dugsong Exp $ |
| */ |
| |
| #include "config.h" |
| |
| #include <sys/types.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include "buf.h" |
| #include "decode.h" |
| |
| /* stolen from CVS scramble.c */ |
| static u_char cvs_shifts[] = { |
| 0, 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, |
| 114,120, 53, 79, 96,109, 72,108, 70, 64, 76, 67,116, 74, 68, 87, |
| 111, 52, 75,119, 49, 34, 82, 81, 95, 65,112, 86,118,110,122,105, |
| 41, 57, 83, 43, 46,102, 40, 89, 38,103, 45, 50, 42,123, 91, 35, |
| 125, 55, 54, 66,124,126, 59, 47, 92, 71,115, 78, 88,107,106, 56, |
| 36,121,117,104,101,100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48, |
| 58,113, 32, 90, 44, 98, 60, 51, 33, 97, 62, 77, 84, 80, 85,223, |
| 225,216,187,166,229,189,222,188,141,249,148,200,184,136,248,190, |
| 199,170,181,204,138,232,218,183,255,234,220,247,213,203,226,193, |
| 174,172,228,252,217,201,131,230,197,211,145,238,161,179,160,212, |
| 207,221,254,173,202,146,224,151,140,196,205,130,135,133,143,246, |
| 192,159,244,239,185,168,215,144,139,165,180,157,147,186,214,176, |
| 227,231,219,169,175,156,206,198,129,164,150,210,154,177,134,127, |
| 182,128,158,208,162,132,167,209,149,241,153,251,237,236,171,195, |
| 243,233,253,240,194,250,191,155,142,137,245,235,163,242,178,152 |
| }; |
| |
| int |
| decode_cvs(u_char *buf, int len, u_char *obuf, int olen) |
| { |
| struct buf *line, inbuf, outbuf; |
| u_char *p; |
| int i, n; |
| |
| buf_init(&inbuf, buf, len); |
| buf_init(&outbuf, obuf, olen); |
| |
| if (buf_cmp(&inbuf, "BEGIN ", 6) != 0) |
| return (0); |
| |
| for (n = 0; n < 5 && (i = buf_index(&inbuf, "\n", 1)) != -1; n++) { |
| line = buf_tok(&inbuf, NULL, i + 1); |
| line->base[line->end - 1] = '\0'; |
| |
| p = buf_ptr(line); |
| buf_putf(&outbuf, "%s", p); |
| |
| if (n == 3) { |
| if (p[0] != 'A') |
| return (0); |
| |
| for (i = 1; i < sizeof(cvs_shifts) - 1 && p[i]; i++) |
| p[i] = cvs_shifts[p[i]]; |
| |
| buf_putf(&outbuf, " [%s]", p + 1); |
| } |
| buf_put(&outbuf, "\n", 1); |
| } |
| buf_end(&outbuf); |
| |
| return (buf_len(&outbuf)); |
| } |
| |