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Added WriteVarInt32 and ByteSizeVarInt32 to tier1 bf_write.

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This commit is contained in:
Nicholas Hastings 2013-01-10 19:02:29 -05:00
parent eb6ef53ad8
commit 4322ebcfb8
2 changed files with 24 additions and 0 deletions
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3
public/tier1/bitbuf.h
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@ -143,6 +143,9 @@ public:
// writes an unsigned integer with variable bit length // writes an unsigned integer with variable bit length
void WriteUBitVar( unsigned int data ); void WriteUBitVar( unsigned int data );
void WriteVarInt32( uint32 data );
int ByteSizeVarInt32( uint32 data );
// Copy the bits straight out of pIn. This seeks pIn forward by nBits. // Copy the bits straight out of pIn. This seeks pIn forward by nBits.
// Returns an error if this buffer or the read buffer overflows. // Returns an error if this buffer or the read buffer overflows.
bool WriteBitsFromBuffer( class bf_read *pIn, int nBits ); bool WriteBitsFromBuffer( class bf_read *pIn, int nBits );

21
tier1/bitbuf.cpp
View File

@ -236,6 +236,27 @@ void bf_write::WriteSBitLong( int data, int numbits )
} }
} }
void bf_write::WriteVarInt32( uint32 data )
{
while ( data > 0x7F )
{
WriteUBitLong( (data & 0x7F) | 0x80, 8 );
data >>= 7;
}
WriteUBitLong( data & 0x7F, 8 );
}
int bf_write::ByteSizeVarInt32( uint32 data )
{
int size = 1;
while ( data > 0x7F )
{
size++;
data >>= 7;
}
return size;
}
#if _WIN32 #if _WIN32
inline unsigned int BitCountNeededToEncode(unsigned int data) inline unsigned int BitCountNeededToEncode(unsigned int data)
{ {