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Fix more than 256 codes of same length.

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Fix all 256 literal codes of same length.
This commit is contained in:
Piotr Fusik 2017-11-07 20:10:19 +01:00
parent afcfba9355
commit 84edf4cbfd
1 changed files with 28 additions and 9 deletions
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37
libsrc/zlib/inflatemem.s
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@ -1,5 +1,5 @@
;
; 2017-11-06, Piotr Fusik
; 2017-11-07, Piotr Fusik
;
; unsigned __fastcall__ inflatemem (char* dest, const char* source);
;
@ -344,6 +344,9 @@ buildHuffmanTree_clear:
buildHuffmanTree_countCodeLengths:
ldx literalSymbolCodeLength,y
inc nBitCode_literalCount,x
bne buildHuffmanTree_notAllLiterals
stx allLiteralsCodeLength
buildHuffmanTree_notAllLiterals:
cpy #CONTROL_SYMBOLS
bcs buildHuffmanTree_noControlSymbol
ldx controlSymbolCodeLength,y
@ -394,12 +397,33 @@ fetchCode_nextBit:
jsr getBit
rol a
inx
bcs fetchCode_ge256
; are all 256 literal codes of this length?
cpx allLiteralsCodeLength
beq fetchCode_allLiterals
; is it literal code of length X?
sec
sbc nBitCode_literalCount,x
bcc fetchCode_literal
bcs fetchCode_notLiteral
; literal code
; clc
adc nBitCode_literalOffset,x
tax
lda codeToLiteralSymbol,x
fetchCode_allLiterals:
clc
rts
; code >= 256, must be control
fetchCode_ge256:
; sec
sbc nBitCode_literalCount,x
sec
; is it control code of length X?
fetchCode_notLiteral:
; sec
sbc nBitCode_controlCount,x
bcs fetchCode_nextBit
; control code
; clc
adc nBitCode_controlOffset,x
tax
@ -408,13 +432,6 @@ fetchCode_nextBit:
tax
; sec
rts
fetchCode_literal:
; clc
adc nBitCode_literalOffset,x
tax
lda codeToLiteralSymbol,x
clc
rts
; Read A minus 1 bits, but no more than 8
getAMinus1BitsMax8:
@ -523,6 +540,8 @@ nBitCode_literalOffset:
.res 2*TREE_SIZE
nBitCode_controlOffset:
.res 2*TREE_SIZE
allLiteralsCodeLength:
.res 1
codeToLiteralSymbol:
.res 256