diff options
Diffstat (limited to 'src/shell.h')
| -rw-r--r-- | src/shell.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/shell.h b/src/shell.h index 9b67696..98edc8b 100644 --- a/src/shell.h +++ b/src/shell.h @@ -92,3 +92,13 @@ extern char nullstr[1]; /* null string */ #define likely(x) __builtin_expect(!!(x),1) #define unlikely(x) __builtin_expect(!!(x),0) + +/* + * Hack to calculate maximum length. + * (length * 8 - 1) * log10(2) + 1 + 1 + 12 + * The second 1 is for the minus sign and the 12 is a safety margin. + */ +static inline int max_int_length(int bytes) +{ + return (bytes * 8 - 1) * 0.30102999566398119521 + 14; +} |