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comparison src/com/tmate/hgkit/ll/RevlogStream.java @ 43:1b26247d7367

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Calculate result length of the patch operarion, when unknown
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 04:41:05 +0100
parents e45e75e22523
children b79cf0118dd3
comparison
equal deleted inserted replaced
42:92c3d0920d58 43:1b26247d7367
284 284
285 // mpatch.c : apply() 285 // mpatch.c : apply()
286 // FIXME need to implement patch merge (fold, combine, gather and discard from aforementioned mpatch.[c|py]), also see Revlog and Mercurial PDF 286 // FIXME need to implement patch merge (fold, combine, gather and discard from aforementioned mpatch.[c|py]), also see Revlog and Mercurial PDF
287 // FIXME why 2 arrays (rv and tempBuf)???. Think over in-place merging (perhaps some sparse byte chunk list?) - to minimize mem use. 287 // FIXME why 2 arrays (rv and tempBuf)???. Think over in-place merging (perhaps some sparse byte chunk list?) - to minimize mem use.
288 /*package-local for HgBundle; until moved to better place*/static byte[] apply(byte[] baseRevisionContent, int outcomeLen, List<PatchRecord> patch) { 288 /*package-local for HgBundle; until moved to better place*/static byte[] apply(byte[] baseRevisionContent, int outcomeLen, List<PatchRecord> patch) {
289 byte[] tempBuf = new byte[outcomeLen]; // XXX
290 int last = 0, destIndex = 0; 289 int last = 0, destIndex = 0;
290 if (outcomeLen == -1) {
291 outcomeLen = baseRevisionContent.length;
292 for (PatchRecord pr : patch) {
293 outcomeLen += pr.start - last + pr.len;
294 last = pr.end;
295 }
296 outcomeLen -= last;
297 last = 0;
298 }
299 byte[] rv = new byte[outcomeLen];
291 for (PatchRecord pr : patch) { 300 for (PatchRecord pr : patch) {
292 System.arraycopy(baseRevisionContent, last, tempBuf, destIndex, pr.start-last); 301 System.arraycopy(baseRevisionContent, last, rv, destIndex, pr.start-last);
293 destIndex += pr.start - last; 302 destIndex += pr.start - last;
294 System.arraycopy(pr.data, 0, tempBuf, destIndex, pr.data.length); 303 System.arraycopy(pr.data, 0, rv, destIndex, pr.data.length);
295 destIndex += pr.data.length; 304 destIndex += pr.data.length;
296 last = pr.end; 305 last = pr.end;
297 } 306 }
298 System.arraycopy(baseRevisionContent, last, tempBuf, destIndex, baseRevisionContent.length - last); 307 System.arraycopy(baseRevisionContent, last, rv, destIndex, baseRevisionContent.length - last);
299 destIndex += baseRevisionContent.length - last; // total length
300 byte[] rv = new byte[destIndex];
301 System.arraycopy(tempBuf, 0, rv, 0, destIndex);
302 return rv; 308 return rv;
303 } 309 }
304 310
305 // @see http://mercurial.selenic.com/wiki/BundleFormat, in Changelog group description 311 // @see http://mercurial.selenic.com/wiki/BundleFormat, in Changelog group description
306 /*package-local*/ static class PatchRecord { // copy of struct frag from mpatch.c 312 /*package-local*/ static class PatchRecord { // copy of struct frag from mpatch.c