| /* |
| * Copyright (C) 2008, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.patch; |
| |
| import static org.eclipse.jgit.util.RawParseUtils.nextLF; |
| import static org.eclipse.jgit.util.RawParseUtils.parseBase10; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.text.MessageFormat; |
| |
| import org.eclipse.jgit.internal.JGitText; |
| import org.eclipse.jgit.lib.AbbreviatedObjectId; |
| import org.eclipse.jgit.util.MutableInteger; |
| |
| /** |
| * Hunk header for a hunk appearing in a "diff --cc" style patch. |
| */ |
| public class CombinedHunkHeader extends HunkHeader { |
| private static abstract class CombinedOldImage extends OldImage { |
| int nContext; |
| } |
| |
| private CombinedOldImage[] old; |
| |
| CombinedHunkHeader(CombinedFileHeader fh, int offset) { |
| super(fh, offset, null); |
| old = new CombinedOldImage[fh.getParentCount()]; |
| for (int i = 0; i < old.length; i++) { |
| final int imagePos = i; |
| old[i] = new CombinedOldImage() { |
| @Override |
| public AbbreviatedObjectId getId() { |
| return fh.getOldId(imagePos); |
| } |
| }; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public CombinedFileHeader getFileHeader() { |
| return (CombinedFileHeader) super.getFileHeader(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public OldImage getOldImage() { |
| return getOldImage(0); |
| } |
| |
| /** |
| * Get the OldImage data related to the nth ancestor |
| * |
| * @param nthParent |
| * the ancestor to get the old image data of |
| * @return image data of the requested ancestor. |
| */ |
| public OldImage getOldImage(int nthParent) { |
| return old[nthParent]; |
| } |
| |
| @Override |
| void parseHeader() { |
| // Parse "@@@ -55,12 -163,13 +163,15 @@@ protected boolean" |
| // |
| final byte[] buf = file.buf; |
| final MutableInteger ptr = new MutableInteger(); |
| ptr.value = nextLF(buf, startOffset, ' '); |
| |
| for (CombinedOldImage o : old) { |
| o.startLine = -parseBase10(buf, ptr.value, ptr); |
| if (buf[ptr.value] == ',') { |
| o.lineCount = parseBase10(buf, ptr.value + 1, ptr); |
| } else { |
| o.lineCount = 1; |
| } |
| } |
| |
| newStartLine = parseBase10(buf, ptr.value + 1, ptr); |
| if (buf[ptr.value] == ',') |
| newLineCount = parseBase10(buf, ptr.value + 1, ptr); |
| else |
| newLineCount = 1; |
| } |
| |
| @Override |
| int parseBody(Patch script, int end) { |
| final byte[] buf = file.buf; |
| int c = nextLF(buf, startOffset); |
| |
| for (CombinedOldImage o : old) { |
| o.nDeleted = 0; |
| o.nAdded = 0; |
| o.nContext = 0; |
| } |
| nContext = 0; |
| int nAdded = 0; |
| |
| SCAN: for (int eol; c < end; c = eol) { |
| eol = nextLF(buf, c); |
| |
| if (eol - c < old.length + 1) { |
| // Line isn't long enough to mention the state of each |
| // ancestor. It must be the end of the hunk. |
| break SCAN; |
| } |
| |
| switch (buf[c]) { |
| case ' ': |
| case '-': |
| case '+': |
| break; |
| |
| default: |
| // Line can't possibly be part of this hunk; the first |
| // ancestor information isn't recognizable. |
| // |
| break SCAN; |
| } |
| |
| int localcontext = 0; |
| for (int ancestor = 0; ancestor < old.length; ancestor++) { |
| switch (buf[c + ancestor]) { |
| case ' ': |
| localcontext++; |
| old[ancestor].nContext++; |
| continue; |
| |
| case '-': |
| old[ancestor].nDeleted++; |
| continue; |
| |
| case '+': |
| old[ancestor].nAdded++; |
| nAdded++; |
| continue; |
| |
| default: |
| break SCAN; |
| } |
| } |
| if (localcontext == old.length) |
| nContext++; |
| } |
| |
| for (int ancestor = 0; ancestor < old.length; ancestor++) { |
| final CombinedOldImage o = old[ancestor]; |
| final int cmp = o.nContext + o.nDeleted; |
| if (cmp < o.lineCount) { |
| final int missingCnt = o.lineCount - cmp; |
| script.error(buf, startOffset, MessageFormat.format( |
| JGitText.get().truncatedHunkLinesMissingForAncestor, |
| Integer.valueOf(missingCnt), |
| Integer.valueOf(ancestor + 1))); |
| } |
| } |
| |
| if (nContext + nAdded < newLineCount) { |
| final int missingCount = newLineCount - (nContext + nAdded); |
| script.error(buf, startOffset, MessageFormat.format( |
| JGitText.get().truncatedHunkNewLinesMissing, |
| Integer.valueOf(missingCount))); |
| } |
| |
| return c; |
| } |
| |
| @Override |
| void extractFileLines(OutputStream[] out) throws IOException { |
| final byte[] buf = file.buf; |
| int ptr = startOffset; |
| int eol = nextLF(buf, ptr); |
| if (endOffset <= eol) |
| return; |
| |
| // Treat the hunk header as though it were from the ancestor, |
| // as it may have a function header appearing after it which |
| // was copied out of the ancestor file. |
| // |
| out[0].write(buf, ptr, eol - ptr); |
| |
| SCAN: for (ptr = eol; ptr < endOffset; ptr = eol) { |
| eol = nextLF(buf, ptr); |
| |
| if (eol - ptr < old.length + 1) { |
| // Line isn't long enough to mention the state of each |
| // ancestor. It must be the end of the hunk. |
| break SCAN; |
| } |
| |
| switch (buf[ptr]) { |
| case ' ': |
| case '-': |
| case '+': |
| break; |
| |
| default: |
| // Line can't possibly be part of this hunk; the first |
| // ancestor information isn't recognizable. |
| // |
| break SCAN; |
| } |
| |
| int delcnt = 0; |
| for (int ancestor = 0; ancestor < old.length; ancestor++) { |
| switch (buf[ptr + ancestor]) { |
| case '-': |
| delcnt++; |
| out[ancestor].write(buf, ptr, eol - ptr); |
| continue; |
| |
| case ' ': |
| out[ancestor].write(buf, ptr, eol - ptr); |
| continue; |
| |
| case '+': |
| continue; |
| |
| default: |
| break SCAN; |
| } |
| } |
| if (delcnt < old.length) { |
| // This line appears in the new file if it wasn't deleted |
| // relative to all ancestors. |
| // |
| out[old.length].write(buf, ptr, eol - ptr); |
| } |
| } |
| } |
| |
| @Override |
| void extractFileLines(final StringBuilder sb, final String[] text, |
| final int[] offsets) { |
| final byte[] buf = file.buf; |
| int ptr = startOffset; |
| int eol = nextLF(buf, ptr); |
| if (endOffset <= eol) |
| return; |
| copyLine(sb, text, offsets, 0); |
| SCAN: for (ptr = eol; ptr < endOffset; ptr = eol) { |
| eol = nextLF(buf, ptr); |
| |
| if (eol - ptr < old.length + 1) { |
| // Line isn't long enough to mention the state of each |
| // ancestor. It must be the end of the hunk. |
| break SCAN; |
| } |
| |
| switch (buf[ptr]) { |
| case ' ': |
| case '-': |
| case '+': |
| break; |
| |
| default: |
| // Line can't possibly be part of this hunk; the first |
| // ancestor information isn't recognizable. |
| // |
| break SCAN; |
| } |
| |
| boolean copied = false; |
| for (int ancestor = 0; ancestor < old.length; ancestor++) { |
| switch (buf[ptr + ancestor]) { |
| case ' ': |
| case '-': |
| if (copied) |
| skipLine(text, offsets, ancestor); |
| else { |
| copyLine(sb, text, offsets, ancestor); |
| copied = true; |
| } |
| continue; |
| |
| case '+': |
| continue; |
| |
| default: |
| break SCAN; |
| } |
| } |
| if (!copied) { |
| // If none of the ancestors caused the copy then this line |
| // must be new across the board, so it only appears in the |
| // text of the new file. |
| // |
| copyLine(sb, text, offsets, old.length); |
| } |
| } |
| } |
| } |