diff options
Diffstat (limited to 'include/apos/utils.h')
| -rw-r--r-- | include/apos/utils.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/apos/utils.h b/include/apos/utils.h index 881cd8f..d0b41ce 100644 --- a/include/apos/utils.h +++ b/include/apos/utils.h @@ -25,6 +25,8 @@ #define container_of(ptr, type, member) \ ((type *)((char *)(ptr) - offsetof(type, member))) +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + #include <apos/types.h> static inline size_t align_up(size_t val, size_t a) @@ -48,4 +50,29 @@ static inline size_t align_down(size_t val, size_t a) return val - (val % a); } +static inline size_t asciinum(char c) +{ + if(c >= '0' && c <= '9') + return c - '0'; + else if(c >= 'A' && c <= 'F') + return c - 'A' + 10; + else if(c >= 'a' && c <= 'f') + return c - 'a' + 10; + else + return 0; +} + +static inline size_t convnum(const char *c, size_t len, size_t base) +{ + size_t multiplier = 1; + size_t sum = 0; + for(size_t i = 0; i < len; ++i){ + sum += asciinum(c[len - 1 - i]) * multiplier; + multiplier *= base; + } + + return sum; +} + + #endif /* APOS_UTILS_H */ |