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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* https://plantuml.com/patreon (only 1$ per month!)
* https://plantuml.com/liberapay (only 1€ per month!)
* https://plantuml.com/paypal
*
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License V2.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [GNU General Public License V2]
*
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
*
* You may obtain a copy of the License at
*
* https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this GPL v2 license.
*
* The generated images can then be used without any reference to the GPL v2 license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
package net.sourceforge.plantuml.zopfli;
class BlockSplitter {
// ::remove folder when __CORE__
static int split(Cookie cookie, byte[] input, int from, int to) {
LzStore store = cookie.store1;
store.reset();
Deflate.greedy(cookie, null, input, from, to, store);
int nPoints = splitLz(cookie, store.litLens, store.dists, store.size);
int pos = from;
char[] dists = store.dists;
char[] litLens = store.litLens;
int[] points = cookie.splitPoints;
points[0] = pos;
for (int i = 0, j = 1; j <= nPoints; ++j) {
for (int pj = points[j]; i < pj; ++i) {
pos += (dists[i] == 0) ? 1 : litLens[i];
}
points[j] = pos;
}
return nPoints;
}
// TODO: May be use some kind of SORTED data-structure for splitPoints?
static int splitLz(Cookie cookie, char[] litLens, char[] dists, int llSize) {
int[] splitPoints = cookie.splitPoints;
int[] splitSize = cookie.splitSize;
splitPoints[0] = 0;
splitSize[0] = Deflate.calculateBlockSize(cookie, litLens, dists, 0, llSize);
splitPoints[1] = llSize;
splitSize[1] = -1;
int numBlocks = 1;
int maxBlocks = cookie.blockSplittingMax;
if (llSize < 10) {
return numBlocks;
}
int lStart = 0;
int lEnd = llSize;
int blockN = 0;
while (numBlocks < maxBlocks) {
int llPos = findMinimum(cookie, litLens, dists, lStart, lEnd);
int splitL = Deflate.calculateBlockSize(cookie, litLens, dists, lStart, llPos);
int splitR = Deflate.calculateBlockSize(cookie, litLens, dists, llPos, lEnd);
if (splitL + splitR > splitSize[blockN] || llPos == lStart + 1 || llPos == lEnd) {
splitSize[blockN] = -1;
} else {
splitSize[blockN] = splitL;
numBlocks++;
blockN++;
System.arraycopy(splitPoints, blockN, splitPoints, blockN + 1, numBlocks - blockN);
System.arraycopy(splitSize, blockN, splitSize, blockN + 1, numBlocks - blockN);
splitPoints[blockN] = llPos;
splitSize[blockN] = splitR;
}
int longest = 0;
boolean found = false;
for (int i = 0; i < numBlocks; i++) {
int start = splitPoints[i];
int end = splitPoints[i + 1];
if ((splitSize[i] != -1) && end - start > longest) {
lStart = start;
lEnd = end;
found = true;
longest = end - start;
blockN = i;
}
}
if (!found) {
break;
}
if (lEnd - lStart < 10) {
break;
}
}
return numBlocks;
}
private static int findMinimum(Cookie cookie, char[] litLens, char[] dists, int from, int to) {
int start = from + 1;
int end = to;
if (end - start < 1024) {
int best = Integer.MAX_VALUE;
int result = start;
for (int i = start; i < end; i++) {
int v = Deflate.calculateBlockSize(cookie, litLens, dists, from, i)
+ Deflate.calculateBlockSize(cookie, litLens, dists, i, to);
if (v < best) {
best = v;
result = i;
}
}
return result;
} else {
int n = Cookie.SPLIT_PARTITIONS;
int[] p = cookie.p;
int[] vp = cookie.vp;
int lastBest = Integer.MAX_VALUE;
int pos = start;
while (true) {
if (end - start <= n) {
break;
}
for (int i = 0; i < n; i++) {
p[i] = start + (i + 1) * ((end - start) / (n + 1));
vp[i] = Deflate.calculateBlockSize(cookie, litLens, dists, from, p[i])
+ Deflate.calculateBlockSize(cookie, litLens, dists, p[i], to);
}
int bestI = 0;
int best = vp[0];
for (int i = 1; i < n; i++) {
if (vp[i] < best) {
best = vp[i];
bestI = i;
}
}
if (best > lastBest) {
break;
}
start = bestI == 0 ? start : p[bestI - 1];
end = bestI == n - 1 ? end : p[bestI + 1];
pos = p[bestI];
lastBest = best;
}
return pos;
}
}
}