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| author | Denys Vlasenko | 2018-12-22 21:45:18 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2018-12-22 21:45:18 +0100 |
| commit | 2ea8ddf8c245dd160eacf35409572c28345506f7 (patch) | |
| tree | a17cfa8d8a63045d47a10a8a1e72f91baf4a8404 | |
| parent | 1557b76edde8bc810f82ac67e3b83b2d6ccce51c (diff) | |
| download | busybox-2ea8ddf8c245dd160eacf35409572c28345506f7.zip busybox-2ea8ddf8c245dd160eacf35409572c28345506f7.tar.gz | |
bc: do not disallow powers to N.0000 degree - it's even shorter code
function old new delta
zbc_num_p 440 424 -16
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | miscutils/bc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 876244b..d7595ce 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -2089,7 +2089,8 @@ static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size size_t i, powrdx, resrdx; bool neg; - if (b->rdx) RETURN_STATUS(bc_error("non integer number")); +// GNU bc does not allow 2^2.0. We do. +// if (b->rdx) RETURN_STATUS(bc_error("non integer number")); if (b->len == 0) { bc_num_one(c); @@ -2109,9 +2110,10 @@ static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size neg = b->neg; b->neg = false; - s = zbc_num_ulong(b, &pow); + b->neg = neg; if (s) RETURN_STATUS(s); + // b is not used beyond this point bc_num_init(©, a->len); bc_num_copy(©, a); @@ -2123,7 +2125,6 @@ static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size scale = a->rdx * pow; } - b->neg = neg; for (powrdx = a->rdx; !(pow & 1); pow >>= 1) { powrdx <<= 1; |