The branch main has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=deb9bfbd5bcea70c79f70c7091c35d399b40fb0a
commit deb9bfbd5bcea70c79f70c7091c35d399b40fb0a Author: Bjoern A. Zeeb <[email protected]> AuthorDate: 2022-01-09 01:09:17 +0000 Commit: Bjoern A. Zeeb <[email protected]> CommitDate: 2022-01-09 14:36:28 +0000 LinuxKPI: add hex2bin() Add a hex2bin() implementation needed by a driver's debugfs code. MFC after: 3 days Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D33798 --- sys/compat/linuxkpi/common/include/linux/kernel.h | 31 +++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h index 94af8f29c4d7..80b684745175 100644 --- a/sys/compat/linuxkpi/common/include/linux/kernel.h +++ b/sys/compat/linuxkpi/common/include/linux/kernel.h @@ -649,6 +649,37 @@ linux_ratelimited(linux_ratelimit_t *rl) #define TAINT_WARN 0 #define test_taint(x) (0) +static inline int +_h2b(const char c) +{ + + if (c >= '0' && c <= '9') + return (c - '0'); + if (c >= 'a' && c <= 'f') + return (10 + c - 'a'); + if (c >= 'A' && c <= 'F') + return (10 + c - 'A'); + return (-EINVAL); +} + +static inline int +hex2bin(uint8_t *bindst, const char *hexsrc, size_t binlen) +{ + int hi4, lo4; + + while (binlen > 0) { + hi4 = _h2b(*hexsrc++); + lo4 = _h2b(*hexsrc++); + if (hi4 < 0 || lo4 < 0) + return (-EINVAL); + + *bindst++ = (hi4 << 4) | lo4; + binlen--; + } + + return (0); +} + /* * Checking if an option is defined would be easy if we could do CPP inside CPP. * The defined case whether -Dxxx or -Dxxx=1 are easy to deal with. In either
