Changes between Version 1 and Version 2 of VectorStreams

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Timestamp:
03/22/10 12:07:38 (3 years ago)
Author:
gb
Comment:

integer encoding/decoding functions use fixed-length fields, not LEB128

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  • VectorStreams

    v1 v2  
    4545 
    4646[Function][[BR]] 
    47 '''UNSIGNED-INTEGER-TO-BINARY''' `value s` 
     47'''UNSIGNED-INTEGER-TO-BINARY''' `value len s` 
    4848 
    49 Encodes the integer VALUE, which should be non-negative, on the VECTOR-OUTPUT-STREAM S using ULEB128. 
     49Encodes the least significant (* LEN 8) bits of the integer VALUE in LEN big-endian bytes on the VECTOR-OUTPUT-STREAM S.  
     50 
    5051 
    5152[Function][[BR]] 
    52 '''SIGNED-INTEGER-TO-BINARY''' `value s` 
     53'''SIGNED-INTEGER-TO-BINARY''' `value len s` 
    5354 
    54 Encodes the integer VALUE on the VECTOR-OUTPUT-STREAM S. Negative integers are encoded in SLEB128 and non-negative integers in ULEB128. 
     55Encodes the integer VALUE in LEN big-endian bytes on the VECTOR-OUTPUT-STREAM S.  
    5556 
    5657[Function][[BR]] 
    5758'''PARSE-UNSIGNED-INTEGER''' `vector &optional (start 0) end` 
    5859 
    59 Decodes a ULEB128-encoded integer from the bounded range of VECTOR, 
    60 which must be of type (VECTOR (UNSIGNED-BYTE 8)). Returns two 
    61 values: that integer and the the index of the first octet in VECTOR 
    62 that follows the encoded integer. (The second value will be > start 
    63 and <= end) 
     60Decodes a big-endian-encoded unsigned integer from the bounded range of VECTOR, 
     61which must be of type (VECTOR (UNSIGNED-BYTE 8)).  
    6462 
    6563[Function][[BR]] 
    6664'''PARSE-SIGNED-INTEGER''' `vector &optional (start 0) end` 
    6765 
    68 As PARSE-UNSIGNED-INTEGER, but assumes SLEB128 encoding and may return 
    69 a negative first value. 
     66As PARSE-UNSIGNED-INTEGER, but interprets the bytes as encoding a signed integer and may return 
     67a negative value. 
    7068 
    7169[Function][[BR]] 
    72 '''PUI-STREAM''' `s` 
     70'''PUI-STREAM''' `s count` 
    7371 
    74 Decodes a ULEB128-encoded integer from the VECTOR-INPUT-STREAM S and 
     72Decodes an unsigned integer encoded in COUNT bytes of big-endian data from the VECTOR-INPUT-STREAM S and 
    7573returns that value. 
    7674 
    7775[Function][[BR]] 
    78 '''PSI-STREAM''' `s` 
     76'''PSI-STREAM''' `s count` 
    7977 
    80 Decodes an SLEB128-encoded integer from the VECTOR-INPUT-STREAM S and 
     78 
     79Decodes a signed integer encoded in COUNT bytes of big-endian data from the VECTOR-INPUT-STREAM S and 
    8180returns that value. 
    8281 
     82