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author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
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committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /Documentation/pcmcia/crc32hash.c | |
parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'Documentation/pcmcia/crc32hash.c')
-rw-r--r-- | Documentation/pcmcia/crc32hash.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/pcmcia/crc32hash.c b/Documentation/pcmcia/crc32hash.c new file mode 100644 index 00000000..44f8beea --- /dev/null +++ b/Documentation/pcmcia/crc32hash.c @@ -0,0 +1,32 @@ +/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */ +/* Usage example: +$ ./crc32hash "Dual Speed" +*/ + +#include <string.h> +#include <stdio.h> +#include <ctype.h> +#include <stdlib.h> + +static unsigned int crc32(unsigned char const *p, unsigned int len) +{ + int i; + unsigned int crc = 0; + while (len--) { + crc ^= *p++; + for (i = 0; i < 8; i++) + crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0); + } + return crc; +} + +int main(int argc, char **argv) { + unsigned int result; + if (argc != 2) { + printf("no string passed as argument\n"); + return -1; + } + result = crc32((unsigned char const *)argv[1], strlen(argv[1])); + printf("0x%x\n", result); + return 0; +} |