tree b5f91bbec82690ce519566656aa3f7d5afe09d88
parent fae89a5076867dd2ab4d73abd959bbbf32a23336
author Pravat Dalbehera <pravat.dalbehera@sonyericsson.com> 1292398800 +0100
committer Johan Redestig <johan.redestig@sonyericsson.com> 1293019051 +0100

Fix for writing empty strings to Parcel::writeString8()

If writeString8 is called with the following sequence:

 writeString8(String8(""));
 writeString8(String8("TempString"));

Then in the readString8, the 2nd String i.e. "TempString" is not read,
instead an empty string is read.

The bug comes because of the write call for String8("") where there are
no String bytes present. In the write Statement, an extra ‘\0’ is
written. During the Marshalling, Following bytes are written:

1        2         3        4       5   ...
0x0      0x0       0xB      ‘T’     ‘e’  ...

The readString8 function has a check that, if String length is 0, don’t
read anything. So the first byte is read as the length for the first
string. The second byte i.e. ‘\0’ is read as the length for the second
string and hence the second string becomes empty too.

Change-Id: Id7acc0c80ae16e77be4331f1ddf69ea87e758420