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| author | Denys Vlasenko | 2018-12-14 09:53:50 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2018-12-14 09:53:50 +0100 |
| commit | 203210e2535e7543e415b052e1d7182f3ca32959 (patch) | |
| tree | 1752716151c1c391f873fbd636dcc6984d9f45ec | |
| parent | 3ac0c21a1fe902c7bebadc0fc454ee047e13c58f (diff) | |
| download | busybox-203210e2535e7543e415b052e1d7182f3ca32959.zip busybox-203210e2535e7543e415b052e1d7182f3ca32959.tar.gz | |
bc: shrink internal library more
function old new delta
bc_lib 1618 1609 -9
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | miscutils/bc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 0a2da6c..8befc8e 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -7143,6 +7143,12 @@ static const char bc_lib[] ALIGN1 = { "scale=20" "\n" "define e(x){" "\n" "auto b,s,n,r,d,i,p,f,v" +////////////////"if(x<0)return(1/e(-x))" // and drop 'n' and x<0 logic below +//^^^^^^^^^^^^^^^^ this would work, and is even more precise than GNU bc: +//e(-.998896): GNU:.36828580434569428695 +// above code:.36828580434569428696 +// actual value:.3682858043456942869594... +// but for now let's be "GNU compatible" "\n" "b=ibase" "\n" "ibase=A" "\n" "if(x<0){" @@ -7219,7 +7225,7 @@ static const char bc_lib[] ALIGN1 = { "\n" "}" "\n" "scale=0" "\n" "q=(x/a+2)/4" -"\n" "x=x-4*q*a" +"\n" "x-=4*q*a" "\n" "if(q%2)x=-x" "\n" "scale=s+2" "\n" "r=a=x" @@ -7288,7 +7294,7 @@ static const char bc_lib[] ALIGN1 = { "\n" "n/=1" "\n" "if(n<0){" "\n" "n=-n" -"\n" "if(n%2==1)o=1" +"\n" "o=n%2" "\n" "}" "\n" "a=1" "\n" "for(i=2;i<=n;++i)a*=i" |