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Fixed bug with byte overruns.

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git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352124 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Glen Stampoultzis 2002-03-01 13:10:15 +00:00
parent d386ad9359
commit 726f0c782b
3 changed files with 10 additions and 2 deletions
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2
src/java/org/apache/poi/hssf/record/FooterRecord.java
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@ -118,7 +118,7 @@ public class FooterRecord
{ {
field_1_footer_len = data[ 0 + offset ]; field_1_footer_len = data[ 0 + offset ];
field_2_footer = new String(data, 1 + offset, field_2_footer = new String(data, 1 + offset,
( int ) field_1_footer_len); LittleEndian.ubyteToInt( field_1_footer_len) );
} }
} }

2
src/java/org/apache/poi/hssf/record/HeaderRecord.java
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@ -118,7 +118,7 @@ public class HeaderRecord
{ {
field_1_header_len = data[ 0 + offset ]; field_1_header_len = data[ 0 + offset ];
field_2_header = new String(data, 1 + offset, field_2_header = new String(data, 1 + offset,
( int ) field_1_header_len); LittleEndian.ubyteToInt(field_1_header_len));
} }
} }

8
src/java/org/apache/poi/util/LittleEndian.java
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@ -498,4 +498,12 @@ public class LittleEndian
v >>= 8; v >>= 8;
} }
} }
/**
* Convert an 'unsigned' byte to an integer. ie, don't carry across the sign.
*/
public static int ubyteToInt(byte b)
{
return ((b & 0x80) == 0 ? (int)b : (int)(b & (byte)0x7f) + 0x80 );
}
} }