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Just another update

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This commit is contained in:
Ingy döt Net 2015-02-20 00:35:01 -05:00
parent a25938f123
commit 00a190b0a6
6591 changed files with 94363 additions and 23227 deletions
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14
Task/Vigen-re-cipher-Cryptanalysis/D/vigen-re-cipher-cryptanalysis.d
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@ -5,14 +5,14 @@ string[2] vigenereDecrypt(in double[] targetFreqs, in string input) {
enum nAlpha = std.ascii.uppercase.length;
static double correlation(in string txt, in double[] sTargets)
/*pure nothrow*/ {
pure nothrow /*@safe*/ @nogc {
uint[nAlpha] charCounts = 0;
foreach (immutable c; txt)
charCounts[c - 'A']++;
return charCounts[].sort().release.dotProduct(sTargets);
}
static frequency(in string txt) pure nothrow {
static frequency(in string txt) pure nothrow @safe {
auto freqs = new Tuple!(char,"c", uint,"d")[nAlpha];
foreach (immutable i, immutable c; std.ascii.uppercase)
freqs[i] = tuple(c, 0);
@ -22,8 +22,8 @@ string[2] vigenereDecrypt(in double[] targetFreqs, in string input) {
}
static string[2] decode(in string cleaned, in string key)
pure nothrow {
assert(key.length > 0);
pure nothrow @safe {
assert(!key.empty);
string decoded;
foreach (immutable i, immutable c; cleaned)
decoded ~= (c - key[i % $] + nAlpha) % nAlpha + 'A';
@ -32,7 +32,7 @@ string[2] vigenereDecrypt(in double[] targetFreqs, in string input) {
static size_t findBestLength(in string cleaned,
in double[] sTargets)
/*pure nothrow*/ {
pure nothrow /*@safe*/ {
size_t bestLength;
double bestCorr = -100.0;
@ -59,7 +59,7 @@ string[2] vigenereDecrypt(in double[] targetFreqs, in string input) {
}
static string findKey(in string cleaned, in size_t bestLength,
in double[] targetFreqs) /*pure*/ {
in double[] targetFreqs) pure nothrow @safe {
auto pieces = new string[bestLength];
foreach (immutable i, immutable c; cleaned)
pieces[i % bestLength] ~= c;
@ -91,7 +91,7 @@ string[2] vigenereDecrypt(in double[] targetFreqs, in string input) {
immutable cleaned = input.toUpper.removechars("^A-Z");
//immutable sortedTargets = sorted(targetFreqs);
//immutable sortedTargets = targetFreqs.sorted;
immutable sortedTargets = targetFreqs.dup.sort().release.idup;
immutable bestLength = findBestLength(cleaned, sortedTargets);