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本帖最后由 bulletmarquis 于 2014-09-30 15:53 编辑
从之前的帖子里面翻了一条比较长的单行awk代码，因为木有分行和缩进，看起来不忍直视
求自动排版，美化一下，不限语言~~
缩进以2个空格为准，前面的参数赋值部分可以忽略- awk -v ord="$ord" -v key="$1" -v l=$length -v ka="0x41C64E6D" -v kb="0x3039" -v kc="0x80000000" 'function mod(p){return (p%256)}function div(p){return int(p/256)}function str_val(str,ret,chars,n,i,k,c){if(str ~ /^0[0-7]*$/){n=length(str);ret=0;for(i=1;i<=n;i++){c=substr(str,i,1);if((k=index("01234567",c))>0)k--;ret=ret*8+k}}else if(str ~ /^0[xX][[:xdigit:]]+/){str=substr(str,3);n=length(str);ret=0;for(i=1;i<=n;i++){c=substr(str,i,1);c=tolower(c);if((k=index("0123456789",c))>0)k--;else if((k=index("abcdef",c))>0) k+=9;ret=ret*16+k}}else if(str ~ /^[-+]?([0-9]+([.][0-9]*([Ee][0-9]+)?)?|([.][0-9]+([Ee][-+]?[0-9]+)?))$/){ret=str+0}else ret="NOT-A-NUMBER";return ret}function hex_ary(p,ary){p=str_val(p);ary="";while(p>0){ary=sprintf("%s:%d",ary,mod(p));p=div(p)}ary=substr(ary,2);return ary}function b_mul(a,b,c,i,j,m,n){m=length(a);n=length(b);for(i=1;i<=m;i++) for(j=1;j<=n;j++){c[i+j-1]+=a[i]*b[j];c[i+j]+=div(c[i+j-1]);c[i+j-1]=mod(c[i+j-1])}for(i=length(c);c[i]<1&&i>1;i--) delete c[i]}BEGIN{split(key,ks,":");split(ord,o,":");for(i=1;i<=l;i++) k[i]=str_val(sprintf("%s%s","0x",ks[length(ks)+1-o[i]]));split(hex_ary(ka),a,":");split(hex_ary(kb),b,":");split(hex_ary(kc),c,":");h=l;la=length(a);lb=length(b);lc=length(c);h=(h<la)?la:h;h=(h<lb)?lb:h;h=(h<lc)?lc:h;ta=str_val(ka);tb=str_val(kb);tc=str_val(kc)}{for(i=1;i<=NF;i++) printf "%02X ",xor(k[i],$i);if(NF<l) exit;tk=0;for(i=l;i>0;i--) tk=tk*256+k[o[i]];delete t;delete d;for(i=1;i<=2*h;i++) t[i]=(i>lb)?0:b[i];for(i=1;i<=l;i++) d[i]=k[o[i]];b_mul(d,a,t);delete p;tp=int((tk*ta+tb)/tc);i=1;while(tp>0){p[i++]=mod(tp);tp=div(tp)};delete q;b_mul(p,c,q);m=length(q);for(i=1;i<=m;i++){t[i]-=q[i];t[i+1]-=(t[i]<0);t[i]=mod(t[i]+256)}for(i=length(t);t[i]<1&&i>1;i--) delete t[i];for(i=1;i<=l;i++) k[o[i]]=t[i];}'
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发表于 2014-09-30 14:35
你写个我学学！
