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author | Damien George <damien.p.george@gmail.com> | 2016-12-28 12:46:20 +1100 |
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committer | Damien George <damien.p.george@gmail.com> | 2016-12-28 12:46:20 +1100 |
commit | ea6a958393eff6999040dd3852d505ae78b96f5b (patch) | |
tree | aaaa408f3d71d163404737991b35b7a18d0a82fa /py/objint.c | |
parent | 44bf8e1f2b3a66e8da09331ac016fa7922d8453c (diff) |
py/objint: Simplify mp_int_format_size and remove unreachable code.
One never needs to format integers with a base larger than 16 (but code
can be easily extended beyond this value if needed in the future).
Diffstat (limited to 'py/objint.c')
-rw-r--r-- | py/objint.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/py/objint.c b/py/objint.c index 1c73141bd..5842a00a4 100644 --- a/py/objint.c +++ b/py/objint.c @@ -151,23 +151,21 @@ typedef mp_int_t fmt_int_t; #endif STATIC const uint8_t log_base2_floor[] = { - 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, + /* if needed, these are the values for higher bases 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5 + */ }; size_t mp_int_format_size(size_t num_bits, int base, const char *prefix, char comma) { - if (base < 2 || base > 32) { - return 0; - } - - size_t num_digits = num_bits / log_base2_floor[base] + 1; + assert(2 <= base && base <= 16); + size_t num_digits = num_bits / log_base2_floor[base - 1] + 1; size_t num_commas = comma ? num_digits / 3 : 0; size_t prefix_len = prefix ? strlen(prefix) : 0; return num_digits + num_commas + prefix_len + 2; // +1 for sign, +1 for null byte |