#include "config.h"

#include <iostream>
#include <cstring>

#include "hash.hh"
#include "archive.hh"
#include "util.hh"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>


namespace nix {


Hash::Hash()
{
    type = htUnknown;
    hashSize = 0;
    memset(hash, 0, maxHashSize);
}


Hash::Hash(HashType type)
{
    this->type = type;
    hashSize = gcry_md_get_algo_dlen(type);

    if (hashSize == 0) throw Error("unknown hash type");
    assert(hashSize <= maxHashSize);
    memset(hash, 0, maxHashSize);
}


bool Hash::operator == (const Hash & h2) const
{
    if (hashSize != h2.hashSize) return false;
    for (unsigned int i = 0; i < hashSize; i++)
        if (hash[i] != h2.hash[i]) return false;
    return true;
}


bool Hash::operator != (const Hash & h2) const
{
    return !(*this == h2);
}


bool Hash::operator < (const Hash & h) const
{
    for (unsigned int i = 0; i < hashSize; i++) {
        if (hash[i] < h.hash[i]) return true;
        if (hash[i] > h.hash[i]) return false;
    }
    return false;
}


const string ba</td></tr></table>
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<tr><th>author</th><td>Efraim Flashner &lt;efraim@flashner.co.il&gt;</td><td class='right'>2024-01-07 12:02:28 +0200</td></tr>
<tr><th>committer</th><td>Efraim Flashner &lt;efraim@flashner.co.il&gt;</td><td class='right'>2024-02-20 13:57:33 +0200</td></tr>
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<div class='commit-subject'>gnu: Add rust-anstyle-0.3.</div><div class='commit-msg'>* gnu/packages/crates-io.scm (rust-anstyle-0.3): New variable.

Change-Id: I01e626109ab3863a41778d5c767750880396c5bd
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2 = *ctx;
    Hash hash(ht);
    nix::finish(ht, ctx2, hash.hash);
    return HashResult(hash, bytes);
}


HashResult hashPath(
    HashType ht, const Path & path, PathFilter & filter)
{
    HashSink sink(ht);
    dumpPath(path, sink, filter);
    return sink.finish();
}


Hash compressHash(const Hash & hash, unsigned int newSize)
{
    Hash h;
    h.hashSize = newSize;
    for (unsigned int i = 0; i < hash.hashSize; ++i)
        h.hash[i % newSize] ^= hash.hash[i];
    return h;
}


HashType parseHashType(const string & s)
{
    if (s == "md5") return htMD5;
    else if (s == "sha1") return htSHA1;
    else if (s == "sha256") return htSHA256;
    else if (s == "sha512") return htSHA512;
    else if (s == "sha3-256") return htSHA3_256;
    else if (s == "sha3-512") return htSHA3_512;
    else if (s == "blake2s-256") return htBLAKE2s_256;
    else return htUnknown;
}


string printHashType(HashType ht)
{
    if (ht == htMD5) return "md5";
    else if (ht == htSHA1) return "sha1";
    else if (ht == htSHA256) return "sha256";
    else if (ht == htSHA512) return "sha512";
    else if (ht == htSHA3_256) return "sha3-256";
    else if (ht == htSHA3_512) return "sha3-512";
    else if (ht == htBLAKE2s_256) return "blake2s-256";
    else throw Error("cannot print unknown hash type");
}


}