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https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
REFACTOR: Reformat code.
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@@ -58,14 +58,11 @@ namespace DiscImageChef.Checksums
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const uint FUZZY_MAX_RESULT = (2 * SPAMSUM_LENGTH + 20);
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//"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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readonly byte[] b64 =
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{0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
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0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
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0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
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0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E,
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0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
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0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33,
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2B, 0x2F
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{
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0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52,
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0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
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0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x30, 0x31,
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0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2B, 0x2F
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};
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struct roll_state
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@@ -118,8 +115,7 @@ namespace DiscImageChef.Checksums
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{
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self = new fuzzy_state();
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self.bh = new blockhash_context[NUM_BLOCKHASHES];
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for(int i = 0; i < NUM_BLOCKHASHES; i++)
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self.bh[i].digest = new byte[SPAMSUM_LENGTH];
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for(int i = 0; i < NUM_BLOCKHASHES; i++) self.bh[i].digest = new byte[SPAMSUM_LENGTH];
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self.bhstart = 0;
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self.bhend = 1;
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@@ -180,8 +176,7 @@ namespace DiscImageChef.Checksums
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{
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uint obh, nbh;
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if(self.bhend >= NUM_BLOCKHASHES)
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return;
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if(self.bhend >= NUM_BLOCKHASHES) return;
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if(self.bhend == 0) // assert
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throw new Exception("Assertion failed");
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@@ -198,20 +193,15 @@ namespace DiscImageChef.Checksums
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void fuzzy_try_reduce_blockhash()
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{
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if(self.bhstart >= self.bhend)
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throw new Exception("Assertion failed");
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if(self.bhstart >= self.bhend) throw new Exception("Assertion failed");
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if(self.bhend - self.bhstart < 2)
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/* Need at least two working hashes. */
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return;
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if((ulong)SSDEEP_BS(self.bhstart) * SPAMSUM_LENGTH >=
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self.total_size)
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/* Need at least two working hashes. */ return;
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if((ulong)SSDEEP_BS(self.bhstart) * SPAMSUM_LENGTH >= self.total_size)
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/* Initial blocksize estimate would select this or a smaller
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* blocksize. */
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return;
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* blocksize. */ return;
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if(self.bh[self.bhstart + 1].dlen < SPAMSUM_LENGTH / 2)
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/* Estimate adjustment would select this blocksize. */
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return;
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/* Estimate adjustment would select this blocksize. */ return;
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/* At this point we are clearly no longer interested in the
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* start_blocksize. Get rid of it. */
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++self.bhstart;
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@@ -239,8 +229,7 @@ namespace DiscImageChef.Checksums
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if(h % SSDEEP_BS(i) != SSDEEP_BS(i) - 1)
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/* Once this condition is false for one bs, it is
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* automatically false for all further bs. I.e. if
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* h === -1 (mod 2*bs) then h === -1 (mod bs). */
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break;
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* h === -1 (mod 2*bs) then h === -1 (mod bs). */ break;
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/* We have hit a reset point. We now emit hashes which are
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* based on all characters in the piece of the message between
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* the last reset point and this one */
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@@ -268,8 +257,7 @@ namespace DiscImageChef.Checksums
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self.bh[i].halfdigest = 0;
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}
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}
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else
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fuzzy_try_reduce_blockhash();
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else fuzzy_try_reduce_blockhash();
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}
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}
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@@ -281,8 +269,7 @@ namespace DiscImageChef.Checksums
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public void Update(byte[] data, uint len)
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{
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self.total_size += len;
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for(int i = 0; i < len; i++)
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fuzzy_engine_step(data[i]);
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for(int i = 0; i < len; i++) fuzzy_engine_step(data[i]);
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}
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/// <summary>
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@@ -313,26 +300,20 @@ namespace DiscImageChef.Checksums
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while((ulong)SSDEEP_BS(bi) * SPAMSUM_LENGTH < self.total_size)
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{
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++bi;
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if(bi >= NUM_BLOCKHASHES)
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{
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throw new OverflowException("The input exceeds data types.");
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}
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if(bi >= NUM_BLOCKHASHES) { throw new OverflowException("The input exceeds data types."); }
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}
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/* Adapt blocksize guess to actual digest length. */
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while(bi >= self.bhend)
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--bi;
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while(bi > self.bhstart && self.bh[bi].dlen < SPAMSUM_LENGTH / 2)
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--bi;
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if((bi > 0 && self.bh[bi].dlen < SPAMSUM_LENGTH / 2))
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throw new Exception("Assertion failed");
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while(bi >= self.bhend) --bi;
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while(bi > self.bhstart && self.bh[bi].dlen < SPAMSUM_LENGTH / 2) --bi;
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if((bi > 0 && self.bh[bi].dlen < SPAMSUM_LENGTH / 2)) throw new Exception("Assertion failed");
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sb.AppendFormat("{0}:", SSDEEP_BS(bi));
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i = Encoding.ASCII.GetBytes(sb.ToString()).Length;
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if(i <= 0)
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/* Maybe snprintf has set errno here? */
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throw new OverflowException("The input exceeds data types.");
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if(i >= remain)
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throw new Exception("Assertion failed");
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/* Maybe snprintf has set errno here? */ throw new OverflowException("The input exceeds data types.");
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if(i >= remain) throw new Exception("Assertion failed");
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remain -= i;
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Array.Copy(Encoding.ASCII.GetBytes(sb.ToString()), 0, result, 0, i);
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@@ -340,21 +321,18 @@ namespace DiscImageChef.Checksums
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result_off += i;
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i = (int)self.bh[bi].dlen;
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if(i > remain)
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throw new Exception("Assertion failed");
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if(i > remain) throw new Exception("Assertion failed");
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Array.Copy(self.bh[bi].digest, 0, result, result_off, i);
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result_off += i;
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remain -= i;
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if(h != 0)
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{
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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result[result_off] = b64[self.bh[bi].h % 64];
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if(i < 3 ||
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result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] ||
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result[result_off] != result[result_off - 3])
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if(i < 3 || result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] || result[result_off] != result[result_off - 3])
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{
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++result_off;
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--remain;
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@@ -362,42 +340,39 @@ namespace DiscImageChef.Checksums
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}
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else if(self.bh[bi].digest[i] != 0)
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{
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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result[result_off] = self.bh[bi].digest[i];
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if(i < 3 ||
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result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] ||
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result[result_off] != result[result_off - 3])
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if(i < 3 || result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] || result[result_off] != result[result_off - 3])
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{
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++result_off;
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--remain;
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}
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}
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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result[result_off++] = 0x3A; // ':'
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--remain;
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if(bi < self.bhend - 1)
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{
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++bi;
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i = (int)self.bh[bi].dlen;
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if(i > remain)
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throw new Exception("Assertion failed");
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if(i > remain) throw new Exception("Assertion failed");
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Array.Copy(self.bh[bi].digest, 0, result, result_off, i);
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result_off += i;
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remain -= i;
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if(h != 0)
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{
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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h = self.bh[bi].halfh;
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result[result_off] = b64[h % 64];
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if(i < 3 ||
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result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] ||
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result[result_off] != result[result_off - 3])
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if(i < 3 || result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] || result[result_off] != result[result_off - 3])
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{
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++result_off;
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--remain;
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@@ -408,13 +383,11 @@ namespace DiscImageChef.Checksums
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i = self.bh[bi].halfdigest;
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if(i != 0)
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{
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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result[result_off] = (byte)i;
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if(i < 3 ||
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result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] ||
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result[result_off] != result[result_off - 3])
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if(i < 3 || result[result_off] != result[result_off - 1] ||
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result[result_off] != result[result_off - 2] || result[result_off] != result[result_off - 3])
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{
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++result_off;
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--remain;
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@@ -424,15 +397,15 @@ namespace DiscImageChef.Checksums
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}
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else if(h != 0)
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{
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if(self.bh[bi].dlen != 0)
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throw new Exception("Assertion failed");
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if(remain <= 0)
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throw new Exception("Assertion failed");
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if(self.bh[bi].dlen != 0) throw new Exception("Assertion failed");
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if(remain <= 0) throw new Exception("Assertion failed");
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result[result_off++] = b64[self.bh[bi].h % 64];
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/* No need to bother with FUZZY_FLAG_ELIMSEQ, because this
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* digest has length 1. */
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--remain;
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}
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result[result_off] = 0;
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return 0;
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}
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@@ -515,8 +488,7 @@ namespace DiscImageChef.Checksums
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for(int i = 0; i < CString.Length; i++)
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{
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if(CString[i] == 0)
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break;
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if(CString[i] == 0) break;
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sb.Append(Encoding.ASCII.GetString(CString, i, 1));
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}
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@@ -524,5 +496,4 @@ namespace DiscImageChef.Checksums
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return sb.ToString();
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}
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}
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}
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}
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