From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- tools/pcmcia/crc32hash.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 tools/pcmcia/crc32hash.c (limited to 'tools/pcmcia/crc32hash.c') diff --git a/tools/pcmcia/crc32hash.c b/tools/pcmcia/crc32hash.c new file mode 100644 index 000000000..1a18da9cb --- /dev/null +++ b/tools/pcmcia/crc32hash.c @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */ +/* Usage example: +$ ./crc32hash "Dual Speed" +*/ + +#include +#include +#include +#include + +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; +} -- cgit v1.2.3