diff options
Diffstat (limited to 'lib/parseopt.c')
-rw-r--r-- | lib/parseopt.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/parseopt.c b/lib/parseopt.c new file mode 100644 index 0000000000..8211733e3b --- /dev/null +++ b/lib/parseopt.c @@ -0,0 +1,124 @@ +#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; +} + +void parseopt_u16(const char *options, const char *opt, uint16_t *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 > U16_MAX) + return; + + if (*endp == ',' || *endp == '\0') + *val = v; +} + +void parseopt_str(const char *options, const char *opt, char **val) +{ + const char *start; + size_t optlen = strlen(opt); + char *endp; + char *parsed; + +again: + start = strstr(options, opt); + + if (!start) + return; + + if (start > options && start[-1] != ',') { + options = start; + goto again; + } + + if (start[optlen] != '=') { + options = start; + goto again; + } + + parsed = (char *)start + optlen + 1; + endp = parsed; + while (*endp != '\0' && *endp != ',') { + + endp++; + } + + *val = xstrndup(parsed, endp - parsed); +} |