Change ZoneCompator to generate the single "tzdata" file.
Also remove the obsolete individual files, and the temporary script
that converted between the formats.
Bug: 7012465
Change-Id: I5a4030098e4d53e747fd6d395df2679d1567ee1f
diff --git a/libc/tools/zoneinfo/ZoneCompactor.java b/libc/tools/zoneinfo/ZoneCompactor.java
index 9fb9cec..6ce24cf 100644
--- a/libc/tools/zoneinfo/ZoneCompactor.java
+++ b/libc/tools/zoneinfo/ZoneCompactor.java
@@ -7,8 +7,7 @@
// usage: java ZoneCompiler <setup file> <data directory> <output directory> <tzdata version>
//
-// Compile a set of tzfile-formatted files into a single file plus
-// an index file.
+// Compile a set of tzfile-formatted files into a single file containing an index.
//
// The compilation is controlled by a setup file, which is provided as a
// command-line argument. The setup file has the form:
@@ -18,195 +17,219 @@
// <zone filename>
// ...
//
-// Note that the links must be declared prior to the zone names. A
-// zone name is a filename relative to the source directory such as
+// Note that the links must be declared prior to the zone names.
+// A zone name is a filename relative to the source directory such as
// 'GMT', 'Africa/Dakar', or 'America/Argentina/Jujuy'.
//
// Use the 'zic' command-line tool to convert from flat files
-// (e.g., 'africa', 'northamerica') into a suitable source directory
-// hierarchy for this tool (e.g., 'data/Africa/Abidjan').
+// (such as 'africa' or 'northamerica') to a directory
+// hierarchy suitable for this tool (containing files such as 'data/Africa/Abidjan').
//
-// Example:
-// zic -d data tz2007h
-// javac ZoneCompactor.java
-// java ZoneCompactor setup data
-// <produces zoneinfo.dat and zoneinfo.idx>
public class ZoneCompactor {
- public static class ByteArrayBufferIteratorBE extends BufferIterator {
- private final byte[] bytes;
- private int offset = 0;
+ public static class ByteArrayBufferIteratorBE extends BufferIterator {
+ private final byte[] bytes;
+ private int offset = 0;
- public ByteArrayBufferIteratorBE(byte[] bytes) {
- this.bytes = bytes;
- this.offset = 0;
- }
-
- public void seek(int offset) {
- this.offset = offset;
- }
-
- public void skip(int byteCount) {
- this.offset += byteCount;
- }
-
- public void readByteArray(byte[] dst, int dstOffset, int byteCount) {
- System.arraycopy(bytes, offset, dst, dstOffset, byteCount);
- offset += byteCount;
- }
-
- public byte readByte() {
- return bytes[offset++];
- }
-
- public int readInt() {
- return ((readByte() & 0xff) << 24) | ((readByte() & 0xff) << 16) | ((readByte() & 0xff) << 8) | (readByte() & 0xff);
- }
-
- public void readIntArray(int[] dst, int dstOffset, int intCount) {
- for (int i = 0; i < intCount; ++i) {
- dst[dstOffset++] = readInt();
- }
- }
-
- public short readShort() {
- throw new UnsupportedOperationException();
- }
+ public ByteArrayBufferIteratorBE(byte[] bytes) {
+ this.bytes = bytes;
+ this.offset = 0;
}
- // Maximum number of characters in a zone name, including '\0' terminator
- private static final int MAXNAME = 40;
-
- // Zone name synonyms
- private Map<String,String> links = new HashMap<String,String>();
-
- // File starting bytes by zone name
- private Map<String,Integer> starts = new HashMap<String,Integer>();
-
- // File lengths by zone name
- private Map<String,Integer> lengths = new HashMap<String,Integer>();
-
- // Raw GMT offsets by zone name
- private Map<String,Integer> offsets = new HashMap<String,Integer>();
- private int start = 0;
-
- // Concatenate the contents of 'inFile' onto 'out'
- // and return the contents as a byte array.
- private static byte[] copyFile(File inFile, OutputStream out) throws Exception {
- byte[] ret = new byte[0];
-
- InputStream in = new FileInputStream(inFile);
- byte[] buf = new byte[8192];
- while (true) {
- int nbytes = in.read(buf);
- if (nbytes == -1) {
- break;
- }
- out.write(buf, 0, nbytes);
-
- byte[] nret = new byte[ret.length + nbytes];
- System.arraycopy(ret, 0, nret, 0, ret.length);
- System.arraycopy(buf, 0, nret, ret.length, nbytes);
- ret = nret;
- }
- out.flush();
- return ret;
+ public void seek(int offset) {
+ this.offset = offset;
}
- // Write a 32-bit integer in network byte order
- private void writeInt(OutputStream os, int x) throws IOException {
- os.write((x >> 24) & 0xff);
- os.write((x >> 16) & 0xff);
- os.write((x >> 8) & 0xff);
- os.write( x & 0xff);
+ public void skip(int byteCount) {
+ this.offset += byteCount;
}
- public ZoneCompactor(String setupFile, String dataDirectory, String outputDirectory, String version) throws Exception {
- File zoneInfoFile = new File(outputDirectory, "zoneinfo.dat");
- zoneInfoFile.delete();
- OutputStream zoneInfo = new FileOutputStream(zoneInfoFile);
-
- BufferedReader rdr = new BufferedReader(new FileReader(setupFile));
-
- String s;
- while ((s = rdr.readLine()) != null) {
- s = s.trim();
- if (s.startsWith("Link")) {
- StringTokenizer st = new StringTokenizer(s);
- st.nextToken();
- String to = st.nextToken();
- String from = st.nextToken();
- links.put(from, to);
- } else {
- String link = links.get(s);
- if (link == null) {
- File f = new File(dataDirectory, s);
- long length = f.length();
- starts.put(s, new Integer(start));
- lengths.put(s, new Integer((int)length));
-
- start += length;
- byte[] data = copyFile(f, zoneInfo);
-
- BufferIterator it = new ByteArrayBufferIteratorBE(data);
- TimeZone tz = ZoneInfo.makeTimeZone(s, it);
- int gmtOffset = tz.getRawOffset();
- offsets.put(s, new Integer(gmtOffset));
- }
- }
- }
- zoneInfo.close();
-
- // Fill in fields for links
- Iterator<String> iter = links.keySet().iterator();
- while (iter.hasNext()) {
- String from = iter.next();
- String to = links.get(from);
-
- starts.put(from, starts.get(to));
- lengths.put(from, lengths.get(to));
- offsets.put(from, offsets.get(to));
- }
-
- File idxFile = new File(outputDirectory, "zoneinfo.idx");
- idxFile.delete();
- FileOutputStream idx = new FileOutputStream(idxFile);
-
- ArrayList<String> l = new ArrayList<String>();
- l.addAll(starts.keySet());
- Collections.sort(l);
- Iterator<String> ziter = l.iterator();
- while (ziter.hasNext()) {
- String zname = ziter.next();
- if (zname.length() >= MAXNAME) {
- System.err.println("Error - zone filename exceeds " +
- (MAXNAME - 1) + " characters!");
- }
-
- byte[] znameBuf = new byte[MAXNAME];
- for (int i = 0; i < zname.length(); i++) {
- znameBuf[i] = (byte)zname.charAt(i);
- }
- idx.write(znameBuf);
- writeInt(idx, starts.get(zname).intValue());
- writeInt(idx, lengths.get(zname).intValue());
- writeInt(idx, offsets.get(zname).intValue());
- }
- idx.close();
-
- OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(new File(outputDirectory, "zoneinfo.version")), "US-ASCII");
- writer.write(version);
- writer.write('\n');
- writer.close();
-
- // System.out.println("maxLength = " + maxLength);
+ public void readByteArray(byte[] dst, int dstOffset, int byteCount) {
+ System.arraycopy(bytes, offset, dst, dstOffset, byteCount);
+ offset += byteCount;
}
- public static void main(String[] args) throws Exception {
- if (args.length != 4) {
- System.err.println("usage: java ZoneCompactor <setup file> <data directory> <output directory> <tzdata version>");
- System.exit(0);
- }
- new ZoneCompactor(args[0], args[1], args[2], args[3]);
+ public byte readByte() {
+ return bytes[offset++];
}
+
+ public int readInt() {
+ return ((readByte() & 0xff) << 24) | ((readByte() & 0xff) << 16) | ((readByte() & 0xff) << 8) | (readByte() & 0xff);
+ }
+
+ public void readIntArray(int[] dst, int dstOffset, int intCount) {
+ for (int i = 0; i < intCount; ++i) {
+ dst[dstOffset++] = readInt();
+ }
+ }
+
+ public short readShort() {
+ throw new UnsupportedOperationException();
+ }
+ }
+
+ // Maximum number of characters in a zone name, including '\0' terminator
+ private static final int MAXNAME = 40;
+
+ // Zone name synonyms
+ private Map<String,String> links = new HashMap<String,String>();
+
+ // File starting bytes by zone name
+ private Map<String,Integer> starts = new HashMap<String,Integer>();
+
+ // File lengths by zone name
+ private Map<String,Integer> lengths = new HashMap<String,Integer>();
+
+ // Raw GMT offsets by zone name
+ private Map<String,Integer> offsets = new HashMap<String,Integer>();
+ private int start = 0;
+
+ // Concatenate the contents of 'inFile' onto 'out'
+ // and return the contents as a byte array.
+ private static byte[] copyFile(File inFile, OutputStream out) throws Exception {
+ byte[] ret = new byte[0];
+
+ InputStream in = new FileInputStream(inFile);
+ byte[] buf = new byte[8192];
+ while (true) {
+ int nbytes = in.read(buf);
+ if (nbytes == -1) {
+ break;
+ }
+ out.write(buf, 0, nbytes);
+
+ byte[] nret = new byte[ret.length + nbytes];
+ System.arraycopy(ret, 0, nret, 0, ret.length);
+ System.arraycopy(buf, 0, nret, ret.length, nbytes);
+ ret = nret;
+ }
+ out.flush();
+ return ret;
+ }
+
+ public ZoneCompactor(String setupFile, String dataDirectory, String outputDirectory, String version) throws Exception {
+ // Read the setup file, and concatenate all the data.
+ ByteArrayOutputStream allData = new ByteArrayOutputStream();
+ BufferedReader reader = new BufferedReader(new FileReader(setupFile));
+ String s;
+ while ((s = reader.readLine()) != null) {
+ s = s.trim();
+ if (s.startsWith("Link")) {
+ StringTokenizer st = new StringTokenizer(s);
+ st.nextToken();
+ String to = st.nextToken();
+ String from = st.nextToken();
+ links.put(from, to);
+ } else {
+ String link = links.get(s);
+ if (link == null) {
+ File sourceFile = new File(dataDirectory, s);
+ long length = sourceFile.length();
+ starts.put(s, start);
+ lengths.put(s, (int) length);
+
+ start += length;
+ byte[] data = copyFile(sourceFile, allData);
+
+ BufferIterator it = new ByteArrayBufferIteratorBE(data);
+ TimeZone tz = ZoneInfo.makeTimeZone(s, it);
+ int gmtOffset = tz.getRawOffset();
+ offsets.put(s, gmtOffset);
+ }
+ }
+ }
+
+ // Fill in fields for links.
+ Iterator<String> it = links.keySet().iterator();
+ while (it.hasNext()) {
+ String from = it.next();
+ String to = links.get(from);
+
+ starts.put(from, starts.get(to));
+ lengths.put(from, lengths.get(to));
+ offsets.put(from, offsets.get(to));
+ }
+
+ // Create/truncate the destination file.
+ RandomAccessFile f = new RandomAccessFile(new File(outputDirectory, "tzdata"), "rw");
+ f.setLength(0);
+
+ // Write the header.
+
+ // byte[12] tzdata_version -- 'tzdata2012f\0'
+ // int file_format_version -- probably won't need this, but just in case
+ // int index_offset -- likewise
+ // int data_offset
+ // int zonetab_offset
+
+ // tzdata_version
+ f.write(toAscii(new byte[12], version));
+
+ // file_format_version
+ f.writeInt(1);
+
+ // Write dummy values for the three offsets, and remember where we need to seek back to later
+ // when we have the real values.
+ int index_offset_offset = (int) f.getFilePointer();
+ f.writeInt(0);
+ int data_offset_offset = (int) f.getFilePointer();
+ f.writeInt(0);
+ int zonetab_offset_offset = (int) f.getFilePointer();
+ f.writeInt(0);
+
+ int index_offset = (int) f.getFilePointer();
+
+ // Write the index.
+ ArrayList<String> sortedOlsonIds = new ArrayList<String>();
+ sortedOlsonIds.addAll(starts.keySet());
+ Collections.sort(sortedOlsonIds);
+ it = sortedOlsonIds.iterator();
+ while (it.hasNext()) {
+ String zoneName = it.next();
+ if (zoneName.length() >= MAXNAME) {
+ throw new RuntimeException("zone filename too long: " + zoneName.length());
+ }
+
+ f.write(toAscii(new byte[MAXNAME], zoneName));
+ f.writeInt(starts.get(zoneName));
+ f.writeInt(lengths.get(zoneName));
+ f.writeInt(offsets.get(zoneName));
+ }
+
+ int data_offset = (int) f.getFilePointer();
+
+ // Write the data.
+ f.write(allData.toByteArray());
+
+ // TODO: append the zonetab.
+ int zonetab_offset = 0;
+
+ // Go back and fix up the offsets in the header.
+ f.seek(index_offset_offset);
+ f.writeInt(index_offset);
+ f.seek(data_offset_offset);
+ f.writeInt(data_offset);
+ f.seek(zonetab_offset_offset);
+ f.writeInt(zonetab_offset);
+
+ f.close();
+ }
+
+ private static byte[] toAscii(byte[] dst, String src) {
+ for (int i = 0; i < src.length(); ++i) {
+ if (src.charAt(i) > '~') {
+ throw new RuntimeException("non-ASCII string: " + src);
+ }
+ dst[i] = (byte) src.charAt(i);
+ }
+ return dst;
+ }
+
+ public static void main(String[] args) throws Exception {
+ if (args.length != 4) {
+ System.err.println("usage: java ZoneCompactor <setup file> <data directory> <output directory> <tzdata version>");
+ System.exit(0);
+ }
+ new ZoneCompactor(args[0], args[1], args[2], args[3]);
+ }
}