| … | |
… | |
| 7 | #else |
7 | #else |
| 8 | #define _ANSI_ARGS_(c) () |
8 | #define _ANSI_ARGS_(c) () |
| 9 | #endif |
9 | #endif |
| 10 | #endif |
10 | #endif |
| 11 | |
11 | |
|
|
12 | #include "ecb.h" |
|
|
13 | |
| 12 | #ifdef __cplusplus |
14 | #ifdef __cplusplus |
| 13 | extern "C" { |
15 | extern "C" { |
| 14 | #endif |
16 | #endif |
| 15 | |
17 | |
| 16 | typedef unsigned int crc32_t; |
18 | typedef uint32_t crc32_t; |
| 17 | #define Z_NULL 0 |
|
|
| 18 | |
19 | |
| 19 | #define crc32 uulib_crc32 |
20 | #define CRC32_INIT ((crc32_t)0) |
| 20 | |
21 | |
| 21 | crc32_t crc32 _ANSI_ARGS_((crc32_t crc, const unsigned char *buf, unsigned int len)); |
22 | crc32_t uu_crc32 _ANSI_ARGS_((crc32_t prev, const void *data, unsigned int len)); |
| 22 | /* |
23 | /* |
| 23 | Update a running crc with the bytes buf[0..len-1] and return the updated |
24 | Update a running crc with the bytes buf[0..len-1] and return the updated |
| 24 | crc. If buf is NULL, this function returns the required initial value |
25 | crc. If buf is NULL, this function returns the required initial value |
| 25 | for the crc. Pre- and post-conditioning (one's complement) is performed |
26 | for the crc. Pre- and post-conditioning (one's complement) is performed |
| 26 | within this function so it shouldn't be done by the application. |
27 | within this function so it shouldn't be done by the application. |
| 27 | Usage example: |
28 | Usage example: |
| 28 | |
29 | |
| 29 | uLong crc = crc32(0L, Z_NULL, 0); |
30 | uLong crc = CRC32_INIT; |
| 30 | |
31 | |
| 31 | while (read_buffer(buffer, length) != EOF) { |
32 | while (read_buffer(buffer, length) != EOF) { |
| 32 | crc = crc32(crc, buffer, length); |
33 | crc = crc32(crc, buffer, length); |
| 33 | } |
34 | } |
| 34 | if (crc != original_crc) error(); |
35 | if (crc != original_crc) error(); |
