From d29693bf10f376870d9bfd34bde80dd061cc4575 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Sun, 21 May 2006 20:57:42 -0700 Subject: [PATCH] pcmcia: expose tool in pcmcia/Documentation/pcmcia/ Expose example and tool source files in the Documentation/ directory in their own files instead of being buried (almost hidden) in readme/txt files. This will make them more visible/usable to users who may need to use them, to developers who may need to test with them, and to janitors who would update them if they were more visible. Also, if any of these possibly should not be in the kernel tree at all, it will be clearer that they are here and we can discuss if they should be removed. Signed-off-by: Randy Dunlap Signed-off-by: Dominik Brodowski --- Documentation/pcmcia/crc32hash.c | 32 ++++++++++++++++++++++++++++++++ Documentation/pcmcia/devicetable.txt | 36 +++--------------------------------- 2 files changed, 35 insertions(+), 33 deletions(-) create mode 100644 Documentation/pcmcia/crc32hash.c (limited to 'Documentation/pcmcia') diff --git a/Documentation/pcmcia/crc32hash.c b/Documentation/pcmcia/crc32hash.c new file mode 100644 index 0000000..cbc36d2 --- /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 +#include +#include +#include + +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(argv[1], strlen(argv[1])); + printf("0x%x\n", result); + return 0; +} diff --git a/Documentation/pcmcia/devicetable.txt b/Documentation/pcmcia/devicetable.txt index 3351c035..199afd1 100644 --- a/Documentation/pcmcia/devicetable.txt +++ b/Documentation/pcmcia/devicetable.txt @@ -27,37 +27,7 @@ pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000 The hex value after "pa" is the hash of product ID string 1, after "pb" for string 2 and so on. -Alternatively, you can use this small tool to determine the crc32 hash. -simply pass the string you want to evaluate as argument to this program, -e.g. +Alternatively, you can use crc32hash (see Documentation/pcmcia/crc32hash.c) +to determine the crc32 hash. Simply pass the string you want to evaluate +as argument to this program, e.g.: $ ./crc32hash "Dual Speed" - -------------------------------------------------------------------------- -/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */ -#include -#include -#include -#include - -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(argv[1], strlen(argv[1])); - printf("0x%x\n", result); - return 0; -} -- cgit v1.1