/**
* read String pool, for apk binary xml file and resource table.
*/
public static async Task <StringPool> readStringPool(ByteBuffer buffer, StringPoolHeader stringPoolHeader)
{
long beginPos = buffer.position();
long[] offsets = new long[(int)stringPoolHeader.getStringCount()];
// read strings offset
if (stringPoolHeader.getStringCount() > 0)
{
for (int idx = 0; idx < stringPoolHeader.getStringCount(); idx++)
{
offsets[idx] = Buffers.readUInt(buffer);
}
}
// read flag
// the string index is sorted by the string values if true
bool sorted = (stringPoolHeader.getFlags() & StringPoolHeader.SORTED_FLAG) != 0;
// string use utf-8 format if true, otherwise utf-16
bool utf8 = (stringPoolHeader.getFlags() & StringPoolHeader.UTF8_FLAG) != 0;
// read strings. the head and metas have 28 bytes
long stringPos = beginPos + stringPoolHeader.getStringsStart() - stringPoolHeader.getHeaderSize();
buffer.position((int)stringPos);
StringPoolEntry[] entries = new StringPoolEntry[offsets.Length];
for (int i = 0; i < offsets.Length; i++)
{
entries[i] = new StringPoolEntry(i, stringPos + offsets[i]);
}
string lastStr = null;
long lastOffset = -1;
StringPool stringPool = new StringPool((int)stringPoolHeader.getStringCount());
foreach (StringPoolEntry entry in entries)
{
if (entry.getOffset() == lastOffset)
{
stringPool.set(entry.getIdx(), lastStr);
continue;
}
buffer.position((int)entry.getOffset());
lastOffset = entry.getOffset();
string str = await ParseUtils.readString(buffer, utf8);
lastStr = str;
stringPool.set(entry.getIdx(), str);
}
// read styles
if (stringPoolHeader.getStyleCount() > 0)
{
// now we just skip it
}
buffer.position((int)(beginPos + stringPoolHeader.getBodySize()));
return(stringPool);
}
/**
* read string pool for dex file.
* dex file string pool diff a bit with binary xml file or resource table.
*
* @param offsets
* @return
* @throws IOException
*/
private StringPool readStrings(long[] offsets)
{
// read strings.
// buffer some apk, the strings' offsets may not well ordered. we sort it first
StringPoolEntry[] entries = new StringPoolEntry[offsets.Length];
for (int i = 0; i < offsets.Length; i++)
{
entries[i] = new StringPoolEntry(i, offsets[i]);
}
string lastStr = null;
long lastOffset = -1;
StringPool stringpool = new StringPool(offsets.Length);
foreach (StringPoolEntry entry in entries)
{
if (entry.getOffset() == lastOffset)
{
stringpool.set(entry.getIdx(), lastStr);
continue;
}
buffer.position((int)entry.getOffset());
lastOffset = entry.getOffset();
string str = readString();
lastStr = str;
stringpool.set(entry.getIdx(), str);
}
return(stringpool);
}
