diff options
Diffstat (limited to 'tools/telechips.c')
| -rw-r--r-- | tools/telechips.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/tools/telechips.c b/tools/telechips.c index 8eefffcb98..acb15b8b14 100644 --- a/tools/telechips.c +++ b/tools/telechips.c @@ -31,6 +31,7 @@ #include <fcntl.h> #include <stdint.h> #include <stdlib.h> +#include <string.h> static uint32_t crctable[256]; @@ -57,11 +58,11 @@ static void gentable(uint32_t poly) { int i; uint32_t r; - uint32_t index; + uint32_t idx; - for (index = 0; index < 256; index++) + for (idx = 0; idx < 256; idx++) { - r = bitreverse(index,8) << 24; + r = bitreverse(idx,8) << 24; for (i=0; i<8; i++) { if (r & (1 << 31)) @@ -69,7 +70,7 @@ static void gentable(uint32_t poly) else r<<=1; } - crctable[index] = bitreverse(r,32); + crctable[idx] = bitreverse(r,32); } } @@ -156,3 +157,26 @@ void telechips_encode_crc(unsigned char* buf, int length) put_uint32le(buf+0x10, crc1); } } + +int telechips_test_crc(unsigned char* buf, int length) +{ + uint32_t crc1, crc2, test_crc1, test_crc2; + unsigned char *test_buf; + + crc1 = get_uint32le(buf + 0x10); + crc2 = get_uint32le(buf + 0x18); + + test_buf = malloc(length); + if (!test_buf) + return 1; + + memcpy(test_buf, buf, length); + telechips_encode_crc(test_buf, length); + + test_crc1 = get_uint32le(test_buf + 0x10); + test_crc2 = get_uint32le(test_buf + 0x18); + + free(test_buf); + + return (crc1 == test_crc1 && crc2 == test_crc2) ? 0 : 2; +} |