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CWB
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| int BFclose | ( | BFile * | stream | ) |
Closes a bit input / output file buffer.
If this is an output buffer, it is flushed before closing.
| stream | The file buffer to close. |
References BFflush(), _bfilebuf::fd, and _bfilebuf::mode.
Referenced by compress_reversed_index(), compute_code_lengths(), decode_check_huff(), and decompress_check_reversed_index().
| int BFflush | ( | BFile * | stream | ) |
Flushes a bit input / output file buffer.
In the case of an output file buffer, the buffer is flushed, even an incomplete byte (so the next one begins at a new byte). In the case of an input file buffer, the buffer skips to the next input byte.
| stream | The file buffer to flush. |
References _bfilebuf::bits_in_buf, _bfilebuf::buf, _bfilebuf::fd, _bfilebuf::mode, and _bfilebuf::position.
Referenced by BFclose(), compress_reversed_index(), compute_code_lengths(), decode_check_huff(), and decompress_check_reversed_index().
| int BFopen | ( | char * | filename, |
| char * | type, | ||
| BFile * | bf | ||
| ) |
Opens a file for bit input / output.
Sets up a bit input/output file buffer (BF)
| filename | Name of file to open |
| type | File-open mode string: "w" or "r" accepted |
| bf | Buffer in which to set up the opened BF |
References _bfilebuf::bits_in_buf, _bfilebuf::buf, _bfilebuf::fd, _bfilebuf::mode, and _bfilebuf::position.
Referenced by compress_reversed_index(), compute_code_lengths(), decode_check_huff(), and decompress_check_reversed_index().
| int BFposition | ( | BFile * | stream | ) |
Gets the stream position of a BFile.
References _bfilebuf::position.
Referenced by compress_reversed_index(), compute_code_lengths(), and decode_check_huff().
| int BFread | ( | unsigned char * | data, |
| int | nbits, | ||
| BFile * | stream | ||
| ) |
Read bit data from a file via a BFile buffer.
NOTE: be sure that you read the data into an unsigned char!
| data | Pointer to the location for the read bit data. |
| nbits | Number of bits to read. |
| stream | The BFile buffer to use. |
References _bfilebuf::bits_in_buf, _bfilebuf::buf, _bfilebuf::fd, and _bfilebuf::position.
Referenced by BFreadWord(), decode_check_huff(), and read_golomb_code_bf().
| int BFreadWord | ( | unsigned int * | data, |
| int | nbits, | ||
| BFile * | stream | ||
| ) |
Reads bit data from a file into an unsigned int.
This function reads nbits into an unsigned int, padded to the right.
| data | Pointer to the location for the read bit data. |
| nbits | Number of bits to read. |
| stream | The BFile buffer to use. |
| int BFwrite | ( | unsigned char | data, |
| int | nbits, | ||
| BFile * | stream | ||
| ) |
Writes bit data to file via a BFile buffer.
Bits accumulate in the buffer till there are 8 of them. Then a byte is written to file (as an unsigned char).
| data | The data to write. |
| nbits | The number of bits to write from data. |
| stream | The buffer to write via. |
References _bfilebuf::bits_in_buf, _bfilebuf::buf, _bfilebuf::fd, and _bfilebuf::position.
Referenced by BFwriteWord(), and write_golomb_code().
| int BFwriteWord | ( | unsigned int | data, |
| int | nbits, | ||
| BFile * | stream | ||
| ) |
Writes bit data to a file from an unsigned int.
This function writes nbits from an unsigned int, padded to the right.
| data | The data to write. |
| nbits | Number of bits to write. |
| stream | The BFile buffer to use. |
References BFwrite(), and bytes.
Referenced by compute_code_lengths(), and write_golomb_code().
| int BSclose | ( | BStream * | stream | ) |
Closes a bit input / output stream buffer.
If this is an output buffer, it is flushed before closing.
| stream | The stream buffer to close. |
References _bstreambuf::base, BSflush(), and _bstreambuf::mode.
Referenced by cl_cpos2id(), cl_delete_stream(), and cl_id2cpos_oldstyle().
| int BSflush | ( | BStream * | stream | ) |
Flushes a bit input / output stream buffer.
In the case of an output stream, the stream is flushed, even an incomplete byte (so the next one begins at a new byte). In the case of an input stream, the stream skips to the next input byte.
| stream | The stream to flush. |
References _bstreambuf::base, _bstreambuf::bits_in_buf, _bstreambuf::buf, _bstreambuf::mode, and _bstreambuf::position.
Referenced by BSclose().
| int BSopen | ( | unsigned char * | base, |
| char * | type, | ||
| BStream * | bf | ||
| ) |
Creates a stream buffer for bit input / output.
Sets up a bit input/output stream buffer (BS)
| base | Pointer to the stream |
| type | Mode-string: "w" or "r" accepted |
| bf | Buffer in which to set up the opened BS |
References _bstreambuf::base, _bstreambuf::bits_in_buf, _bstreambuf::buf, _bstreambuf::mode, and _bstreambuf::position.
Referenced by cl_cpos2id(), cl_id2cpos_oldstyle(), and cl_new_stream().
| int BSposition | ( | BStream * | stream | ) |
Gets the stream position of a BStream.
References _bstreambuf::position.
| int BSread | ( | unsigned char * | data, |
| int | nbits, | ||
| BStream * | stream | ||
| ) |
Read bit data from a stream via a BStream buffer.
NOTE: be sure that you read the data into an unsigned char!
| data | Pointer to the location for the read bit data. |
| nbits | Number of bits to read. |
| stream | The BStream buffer to use. |
References _bstreambuf::base, _bstreambuf::bits_in_buf, _bstreambuf::buf, and _bstreambuf::position.
Referenced by cl_cpos2id(), and read_golomb_code_bs().
| int BSseek | ( | BStream * | stream, |
| off_t | offset | ||
| ) |
Moves the position marker of a BStream (clearing the bit buffer in the process)
| stream | The stream whose position marker is changed. |
| offset | The desired new offset. |
References _bstreambuf::bits_in_buf, _bstreambuf::buf, and _bstreambuf::position.
Referenced by cl_cpos2id(), cl_id2cpos_oldstyle(), and cl_new_stream().
| int BSwrite | ( | unsigned char | data, |
| int | nbits, | ||
| BStream * | stream | ||
| ) |
Writes bit data to a character stream via a BStream buffer.
Bits accumulate in the buffer till there are 8 of them. Then a byte is written to the stream (as an unsigned char).
| data | The data to write. |
| nbits | The number of bits to write from data. |
| stream | The buffer to write via. |
References _bstreambuf::base, _bstreambuf::bits_in_buf, _bstreambuf::buf, and _bstreambuf::position.
1.7.3