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Adding support for GS/OS mixed case names. #84

This commit is contained in:
Rob Greene 2022-06-25 20:04:27 -05:00
parent a4d9c5e746
commit 06c76ed1c3
2 changed files with 159 additions and 70 deletions
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160
lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/os/prodos/ProdosFileEntry.java
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@ -24,6 +24,7 @@ import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.function.Function;
import com.webcodepro.applecommander.storage.DiskFullException;
import com.webcodepro.applecommander.storage.FileEntry;
@ -61,13 +62,14 @@ public class ProdosFileEntry extends ProdosCommonEntry implements FileEntry {
/**
* Return the name of this file.
* This handles normal files, deleted files, and AppleWorks files - which use
* the AUXTYPE attribute to indicate upper/lowercase in the filename.
* This handles normal files, deleted files, AppleWorks files - which use
* the AUXTYPE attribute to indicate upper/lowercase in the filename, and
* GS/OS casing which is in the ProDOS version flags.
* Note that we don't do mixed case for deleted files.
*/
public String getFilename() {
String fileName;
if (isDeleted()) {
fileName = AppleUtil.getString(readFileEntry(), 1, 15);
String fileName = AppleUtil.getString(readFileEntry(), 1, 15);
StringBuffer buf = new StringBuffer();
for (int i=0; i<fileName.length(); i++) {
char ch = fileName.charAt(i);
@ -77,55 +79,53 @@ public class ProdosFileEntry extends ProdosCommonEntry implements FileEntry {
break;
}
}
fileName = buf.toString();
} else {
fileName = AppleUtil.getProdosString(readFileEntry(), 0);
}
if (isAppleWorksFile()) {
int auxtype = getAuxiliaryType();
StringBuffer mixedCase = new StringBuffer(fileName);
// the highest bit of the least significant byte is the first
// character through the 2nd bit of the most significant byte
// being the 15th character. Bit is on indicates lower-case or
// a space if a "." is present.
for (int i=0; i<16 && i<fileName.length(); i++) {
boolean lowerCase;
if (i < 8) {
lowerCase = AppleUtil.isBitSet((byte)auxtype, 7-i);
} else {
lowerCase = AppleUtil.isBitSet((byte)(auxtype >> 8), 7-(i%8));
}
if (lowerCase) {
char ch = mixedCase.charAt(i);
if (ch == '.') {
mixedCase.setCharAt(i, ' ');
} else {
mixedCase.setCharAt(i, Character.toLowerCase(ch));
}
}
}
fileName = mixedCase.toString();
}
// GS/OS upper/lower case mix
if ((getMinimumProdosVersion() & 0x80) != 0) {
int flags = getMinimumProdosVersion() << 8 | getProdosVersion();
int bit = 1 << 14; // 1st bit in 16 bit number is enablement flag, so skipping it
StringBuffer mixedCase = new StringBuffer(fileName);
for (int i=0; i<16 && i<fileName.length(); i++) {
boolean lowerCase = (flags & bit) != 0;
if (lowerCase) {
char ch = mixedCase.charAt(i);
if (ch == '.') {
mixedCase.setCharAt(i, ' ');
} else {
mixedCase.setCharAt(i, Character.toLowerCase(ch));
}
return buf.toString();
}
else {
String fileName = AppleUtil.getProdosString(readFileEntry(), 0);
if (isAppleWorksFile()) {
int auxtype = getAuxiliaryType();
fileName = getMixedCaseName(fileName, auxtype, ProdosFileEntry::calculateAppleWorksBit);
}
// GS/OS upper/lower case mix
else if ((getMinimumProdosVersion() & 0x80) != 0) {
int flags = getMinimumProdosVersion() << 8 | getProdosVersion();
fileName = getMixedCaseName(fileName, flags, ProdosFileEntry::calculateGSOSBit);
}
return fileName;
}
}
/**
* the highest bit of the least significant byte is the first
* character through the 2nd bit of the most significant byte
* being the 15th character. Bit is on indicates lower-case or
* a space if a "." is present.
*/
static int calculateAppleWorksBit(int pos) {
final int[] bitTest = { 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9 };
return 1 << bitTest[pos];
}
/**
* 1st bit in 16 bit number is enablement flag, so skipping it
* flags = e01234567 89ABCDEF (e = enablement flag; hex digits = character index)
*/
static int calculateGSOSBit(int pos) {
return 1 << (14-pos);
}
static String getMixedCaseName(final String original, final int bits,
final Function<Integer,Integer> bitPosition) {
StringBuffer mixedCase = new StringBuffer(original);
for (int i=0; i<mixedCase.length(); i++) {
if ((bits & bitPosition.apply(i)) != 0) {
char ch = mixedCase.charAt(i);
if (ch == '.') {
mixedCase.setCharAt(i, ' ');
} else {
mixedCase.setCharAt(i, Character.toLowerCase(ch));
}
bit >>= 1;
}
fileName = mixedCase.toString();
}
return fileName;
}
}
return mixedCase.toString();
}
/**
@ -137,31 +137,51 @@ public class ProdosFileEntry extends ProdosCommonEntry implements FileEntry {
/**
* Set the name of this file.
* This handles normal files, deleted files, AppleWorks files - which use
* the AUXTYPE attribute to indicate upper/lowercase in the filename, and
* GS/OS casing which is in the ProDOS version flags.
*/
public void setFilename(String filename) {
byte[] fileEntry = readFileEntry();
if (isDeleted()) {
AppleUtil.setString(fileEntry, 1, filename.toUpperCase(), 15);
} else {
AppleUtil.setProdosString(fileEntry, 0, filename.toUpperCase(), 15);
}
// 1. Set the upper/lowercase flags
if (isAppleWorksFile()) {
byte lowByte = 0;
byte highByte = 0;
for (int i=0; i<filename.length(); i++) {
if (Character.isLowerCase(filename.charAt(i))) {
if (i < 8) {
lowByte = AppleUtil.setBit(lowByte, 7-i);
} else if (i < 16) {
highByte = AppleUtil.setBit(highByte, 7-(i%8));
}
}
}
setAuxiliaryType(fileEntry, lowByte, highByte);
// Since we are ALWAYS doing the GSOS filename, we just have a temp holder here.
StringBuilder tempFilename = new StringBuilder(filename);
int auxtype = setMixedCaseFlags(tempFilename, ProdosFileEntry::calculateAppleWorksBit);
setAuxiliaryType(auxtype);
}
StringBuilder alternateFilename = new StringBuilder(filename);
int flags = setMixedCaseFlags(alternateFilename, ProdosFileEntry::calculateGSOSBit);
if (flags != 0) {
// high bit signals mixed case
flags |= 0x8000;
}
filename = alternateFilename.toString();
setMinimumProdosVersion(flags >> 8);
setProdosVersion(flags);
// 2. Set the filename details as the result should be all uppercase.
byte[] fileEntry = readFileEntry();
if (isDeleted()) {
AppleUtil.setString(fileEntry, 1, filename.toUpperCase(), 15);
} else {
AppleUtil.setProdosString(fileEntry, 0, filename.toUpperCase(), 15);
}
writeFileEntry(fileEntry);
}
static int setMixedCaseFlags(StringBuilder filename, Function<Integer,Integer> bitPosition) {
int flags = 0;
for (int i=0; i<filename.length(); i++) {
char ch = filename.charAt(i);
if (Character.isLowerCase(ch) || ch == ' ') {
flags |= bitPosition.apply(i);
if (ch == ' ') ch = '.';
filename.setCharAt(i, Character.toUpperCase(ch));
}
}
return flags;
}
/**
* Copy GEOS-specific metadata to the directory entry verbatim:
* Bytes $00-$10 ($11 bytes)

69
lib/ac-api/src/test/java/com/webcodepro/applecommander/storage/os/prodos/ProdosFileEntryTest.java Normal file
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@ -0,0 +1,69 @@
/*
* AppleCommander - An Apple ][ image utility.
* Copyright (C) 2002-2022 by Robert Greene and others
* robgreene at users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.webcodepro.applecommander.storage.os.prodos;
import org.junit.Test;
import static org.junit.Assert.*;
public class ProdosFileEntryTest {
@Test
public void testGetMixedCaseName_GSOS() {
final String originalName = "DESK.ACCS";
final int flags = 0xb9c0;
final String expectedName = "Desk.Accs";
assertEquals(expectedName, ProdosFileEntry.getMixedCaseName(originalName, flags,
ProdosFileEntry::calculateGSOSBit));
}
@Test
public void testSetMixedCaseName_GSOS() {
final String originalName = "Desk.Accs";
final int expectedFlags = 0xb9c0 & 0x7fff; // the flag is set outside this method
final String expectedName = "DESK.ACCS";
StringBuilder sb = new StringBuilder(originalName);
int actualFlags = ProdosFileEntry.setMixedCaseFlags(sb, ProdosFileEntry::calculateGSOSBit);
assertEquals(expectedName, sb.toString());
assertEquals(expectedFlags, actualFlags);
}
@Test
public void testGetMixedCaseName_AppleWorks() {
final String originalName = "MOUSEFIXER.DOCS";
final int auxtype = 0xee7b;
final String expectedName = "MouseFixer Docs";
assertEquals(expectedName, ProdosFileEntry.getMixedCaseName(originalName, auxtype,
ProdosFileEntry::calculateAppleWorksBit));
}
@Test
public void testSetMixedCaseName_AppleWorks() {
final String originalName = "MouseFixer Docs";
final int expectedFlags = 0xee7b;
final String expectedName = "MOUSEFIXER.DOCS";
StringBuilder sb = new StringBuilder(originalName);
int actualFlags = ProdosFileEntry.setMixedCaseFlags(sb, ProdosFileEntry::calculateAppleWorksBit);
assertEquals(expectedName, sb.toString());
assertEquals(expectedFlags, actualFlags);
}
}