diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/pcmcia/.gitignore | 2 | ||||
| -rw-r--r-- | tools/pcmcia/Makefile | 10 | ||||
| -rw-r--r-- | tools/pcmcia/crc32hash.c | 33 |
3 files changed, 45 insertions, 0 deletions
diff --git a/tools/pcmcia/.gitignore b/tools/pcmcia/.gitignore new file mode 100644 index 000000000..94cb97b77 --- /dev/null +++ b/tools/pcmcia/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +crc32hash diff --git a/tools/pcmcia/Makefile b/tools/pcmcia/Makefile new file mode 100644 index 000000000..eae24df1d --- /dev/null +++ b/tools/pcmcia/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +CC := $(CROSS_COMPILE)gcc +CFLAGS := -I../../usr/include + +PROGS := crc32hash + +all: $(PROGS) + +clean: + rm -fr $(PROGS) diff --git a/tools/pcmcia/crc32hash.c b/tools/pcmcia/crc32hash.c new file mode 100644 index 000000000..1a18da9cb --- /dev/null +++ b/tools/pcmcia/crc32hash.c @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */ +/* Usage example: +$ ./crc32hash "Dual Speed" +*/ + +#include <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; +} |