diff options
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Makefile | 1 | ||||
-rw-r--r-- | lib/parseopt.c | 60 |
2 files changed, 61 insertions, 0 deletions
diff --git a/lib/Makefile b/lib/Makefile index 1be1742499..8f7ef4e4ed 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -59,3 +59,4 @@ obj-y += reed_solomon/ obj-$(CONFIG_RATP) += ratp.o obj-y += list_sort.o obj-y += int_sqrt.o +obj-y += parseopt.o diff --git a/lib/parseopt.c b/lib/parseopt.c new file mode 100644 index 0000000000..8ff83019a7 --- /dev/null +++ b/lib/parseopt.c @@ -0,0 +1,60 @@ +#include <common.h> + +#include "parseopt.h" + +void parseopt_b(const char *options, const char *opt, bool *val) +{ + const char *start; + size_t optlen = strlen(opt); + +again: + start = strstr(options, opt); + + if (!start) { + *val = false; + return; + } + + if (start > options && start[-1] != ',') { + options = start; + goto again; + } + + if (start[optlen] != ',' && start[optlen] != '\0') { + options = start; + goto again; + } + + *val = true; +} + +void parseopt_hu(const char *options, const char *opt, unsigned short *val) +{ + const char *start; + size_t optlen = strlen(opt); + ulong v; + char *endp; + +again: + start = strstr(options, opt); + + if (!start) + return; + + if (start > options && start[-1] != ',') { + options = start; + goto again; + } + + if (start[optlen] != '=') { + options = start; + goto again; + } + + v = simple_strtoul(start + optlen + 1, &endp, 0); + if (v > USHRT_MAX) + return; + + if (*endp == ',' || *endp == '\0') + *val = v; +} |