/usr/share/picolisp/src64/ht.l is in picolisp 3.1.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# (c) Software Lab. Alexander Burger
(data 'HtData)
initData
### Hypertext I/O functions ###
: HtLt asciz "<"
: HtGt asciz ">"
: HtAmp asciz "&"
: HtQuot asciz """
: HtNbsp asciz " "
: HtEsc ascii " \\\"#%&:;<=>?_"
(equ HTESC 12)
(code 'HtCode)
initCode
# (ht:Prin 'sym ..) -> sym
(code 'Prin 2)
push X
push Y
push Z
ld X (E CDR) # Args
do
ld E (X) # Eval next
eval
num E # Number?
jnz 20 # Yes
atom E # Pair?
jz 20 # Yes
sym (E TAIL) # External symbol?
if nz # Yes
20 call prinE_E # Plain print
else
push E # Save return value
call bufStringE_SZ # Write to stack buffer
ld Y S # Point to string
do
nul (Y) # Null byte?
while nz # No
ld B (Y) # Next byte
cmp B (char "<") # Escape special characters
if eq
ld C HtLt # "<"
call outStringC
else
cmp B (char ">")
if eq
ld C HtGt # ">"
call outStringC
else
cmp B (char "&")
if eq
ld C HtAmp # "&"
call outStringC
else
cmp B (char "\"")
if eq
ld C HtQuot # """
call outStringC
else
cmp B (hex "FF")
if eq
ld B (hex "EF")
call (PutB)
ld B (hex "BF")
call (PutB)
ld B (hex "BF")
call (PutB)
else
ld C A # Save char
call (PutB) # Output it
test C (hex "80") # Double byte?
if nz # Yes
inc Y # Next
ld B (Y) # Output second byte
call (PutB)
test C (hex "20") # Triple byte?
if nz # Yes
inc Y # Next
ld B (Y) # Output third byte
call (PutB)
end
end
end
end
end
end
end
inc Y # Increment string pointer
loop
ld S Z # Drop buffer
pop E
end
ld X (X CDR) # X on rest
atom X # More?
until nz # No
pop Z
pop Y
pop X
ret
(code 'putHexB 0) # E
ld E A # Save B
ld B (char "%") # Prefix with "%"
call (PutB)
ld A E # Get B
shr B 4 # Get upper nibble
and B 15
cmp B 9 # Letter?
if gt # Yes
add B 7
end
add B (char "0")
call (PutB) # Output upper nibble
ld A E # Get B again
and B 15 # Get lower nibble
cmp B 9 # Letter?
if gt # Yes
add B 7
end
add B (char "0")
jmp (PutB) # Output lower nibble
(code 'htFmtE 0)
cmp E Nil # NIL?
if ne # No
num E # Number?
if nz # Yes
ld B (char "+") # Prefix with "+"
call (PutB)
jmp prinE # and print it
end
push X
atom E # List?
if z # Yes
ld X E
do
ld B (char "_") # Prefix with "_"
call (PutB)
ld E (X) # Print next item
call htFmtE
ld X (X CDR) # End of list?
atom X
until nz # Yes
else # Symbol
ld X (E TAIL)
call nameX_X # Get name
cmp X ZERO # Any?
if ne # Yes
sym (E TAIL) # External symbol?
if nz # Yes
ld B (char "-") # Prefix with "-"
call (PutB)
call prExtNmX # Print external
else
push Y
ld Y ((EnvIntern))
call isInternEXY_F # Internal symbol?
ld C 0
if eq # Yes
ld B (char "$") # Prefix with "$"
call (PutB)
else
call symByteCX_FACX # Get first byte
cmp B (char "$") # Dollar, plus or minus?
jeq 40
cmp B (char "+")
jeq 40
cmp B (char "-")
jne 50
40 call putHexB # Encode hexadecimal
end
do
call symByteCX_FACX # Next byte
while nz
50 memb HtEsc HTESC # Escape?
if eq # Yes
call putHexB # Encode hexadecimal
else
ld E A # Save char
call (PutB) # Output it
test E (hex "80") # Double byte?
if nz # Yes
call symByteCX_FACX # Next byte
call (PutB) # Output second byte
test E (hex "20") # Triple byte?
if nz # Yes
call symByteCX_FACX # Next byte
call (PutB) # Output third byte
end
end
end
loop
pop Y
end
end
end
pop X
end
ret
# (ht:Fmt 'any ..) -> sym
(code 'Fmt 2)
push X
push Y
push Z
ld X (E CDR) # X on args
link
do
ld E (X)
eval+ # Eval next arg
push E
ld X (X CDR)
atom X # More args?
until nz # No
lea Y (L -I) # Y on first arg
ld Z S # Z on last arg
link
call begString # Start string
ld E (Y)
call htFmtE # Format first arg
do
cmp Y Z # More args?
while ne # Yes
ld B (char "&")
call (PutB)
sub Y I # Next arg
ld E (Y)
call htFmtE # Format it
loop
call endString_E # Retrieve result
drop
pop Z
pop Y
pop X
ret
(code 'getHexX_A 0)
ld A ((X) TAIL) # Get first hex digit
call firstByteA_B
sub B (char "0") # Convert
cmp B 9
if gt
and B (hex "DF")
sub B 7
end
ld X (X CDR) # Next symbol
ret
(code 'getUnicodeX_FAX 0)
ld E X # Save X
ld C 0 # Init unicode value
do
ld X (X CDR)
ld A ((X) TAIL) # Get next character symbol
call firstByteA_B
cmp B (char "0") # Digit?
while ge
cmp B (char "9")
while le # Yes
sub B (char "0") # Convert
push A # Save digit
ld A C # Get accu
mul 10 # Build decimal number
pop C # Get digit
add C A # New unicode value
loop
cmp B (char ";") # Terminator?
if eq # Yes
ld X (X CDR) # Skip ";"
ld A C # Get value
null A # Any?
jnz Ret # Yes
end
ld X E # Restore X
setz # 'z'
ret
(code 'headCX_FX 0) # E
ld E X # Save X
do
inc C # Point to next char
nul (C) # Any?
while nz # Yes
ld A ((X) TAIL) # Get next character symbol
call firstByteA_B
cmp B (C) # Matched?
while eq # Yes
ld X (X CDR)
loop
ldnz X E # Restore X when no match
ret # 'z' if match
# (ht:Pack 'lst) -> sym
(code 'Pack 2)
push X
ld E ((E CDR)) # Eval arg
eval
link
push E # Save
link
ld X E # List in X
call begString # Start string
do
atom X # More items?
while z # Yes
ld E (X) # Get next character symbol
ld A (E TAIL)
call firstByteA_B
cmp B (char "%") # Hex-escaped?
if eq # Yes
ld X (X CDR) # Skip "%"
call getHexX_A # Get upper nibble
shl A 4
ld C A # into C
call getHexX_A # Get lower nibble
or A C # Combine
call (PutB) # Output
else
ld X (X CDR) # Next symbol
cmp B (char "&") # Ampersand?
if ne # No
call outNameE # Normal output
else
ld C HtLt # "<"
call headCX_FX
if eq
ld B (char "<")
call (PutB)
else
ld C HtGt # ">"
call headCX_FX
if eq
ld B (char ">")
call (PutB)
else
ld C HtAmp # "&"
call headCX_FX
if eq
ld B (char "&")
call (PutB)
else
ld C HtQuot # """
call headCX_FX
if eq
ld B (char "\"")
call (PutB)
else
ld C HtNbsp # " "
call headCX_FX
if eq
ld B (char " ")
call (PutB)
else
ld A ((X) TAIL) # Get next byte
call firstByteA_B
cmp B (char "#") # Hash?
jne 40 # No
call getUnicodeX_FAX # Unicode?
if nz # Yes
call mkCharA_A # Make symbol
ld E A
call outNameE # Output unicode char
else
40 ld B (char "&") # Else ouput an ampersand
call (PutB)
end
end
end
end
end
end
end
end
loop
call endString_E # Retrieve result
drop
pop X
ret
### Read content length bytes ###
# (ht:Read 'cnt) -> lst
(code 'Read 2)
push X
ld X E
ld E ((E CDR)) # E on arg
call evCntEX_FE # Eval 'cnt'
if nsz # > 0
ld A (Chr) # Look ahead char?
null A
if z # No
call (Get_A) # Get next char
end
null A # EOF?
if ns # No
call getChar_A # Read first char
cmp A 128 # Double byte?
if ge # Yes
dec E # Decrement count
cmp A 2048 # Triple byte?
if ge # Yes
dec E # Decrement count
end
end
dec E # Less than zero?
if ns # No
call mkCharA_A # First character
call consA_X # Build first cell
ld (X) A
ld (X CDR) Nil
link
push X # <L I> Result
link
do
null E # Count?
if z # No
ld E (L I) # Return result
break T
end
call (Get_A) # Get next char
null A # EOF?
if s # Yes
ld E Nil # Return NIL
break T
end
call getChar_A
cmp A 128 # Double byte?
if ge # Yes
dec E # Decrement count
cmp A 2048 # Triple byte?
if ge # Yes
dec E # Decrement count
end
end
dec E # Less than zero?
if s # Yes
ld E Nil # Return NIL
break T
end
call mkCharA_A # Build next character
call consA_C # And next cell
ld (C) A
ld (C CDR) Nil
ld (X CDR) C # Append to result
ld X C
loop
ld (Chr) 0 # Clear look ahead char
drop
pop X
ret
end
end
end
ld E Nil # Return NIL
pop X
ret
### Chunked Encoding ###
(equ CHUNK 4000)
(data 'Chunk 0)
word 0 # <Y> Chunk size count
word 0 # <Y I> Saved Get_A function
word 0 # <Y II> Saved PutB function
skip CHUNK # <Y III> Chunk buffer
: Newlines asciz "0\\r\\n\\r\\n"
(code 'chrHex_AF 0)
ld A (Chr)
cmp B (char "0") # Decimal digit?
if ge
cmp B (char "9")
if le
sub B 48 # Yes
ret # 'nc'
end
end
and B (hex "DF") # Force upper case
cmp B (char "A") # Hex letter?
if ge
cmp B (char "F")
if le
sub B 55 # Yes
ret # 'nc'
end
end
ld A 0
sub A 1 # -1
ret # 'c'
(code 'chunkSize 0)
push X
ld X Chunk # Get Chunk
null (Chr) # 'Chr'?
if z # No
ld A (X I) # Call saved 'get'
call (A)
end
call chrHex_AF # Read encoded count
ld (X) A # Save in count
if ge # >= 0
do
ld A (X I) # Call saved 'get'
call (A)
call chrHex_AF # Read encoded count
while ge # >= 0
ld C (X) # Get count
shl C 4 # Combine
or C A
ld (X) C
loop
do
cmp (Chr) 10 # Fine linefeed
while ne
null (Chr) # EOF?
js 90 # Return
ld A (X I) # Call saved 'get'
call (A)
loop
ld A (X I) # Call saved 'get'
call (A)
null (X) # Count is zero?
if z # Yes
ld A (X I) # Call saved 'get'
call (A) # Skip '\r' of empty line
ld (Chr) 0 # Discard '\n'
end
end
90 pop X
ret
(code 'getChunked_A 0)
push Y
ld Y Chunk # Get Chunk
null (Y) # Count <= 0
if sz # Yes
ld A -1 # Return EOF
ld (Chr) A
else
ld A (Y I) # Call saved 'get'
call (A)
dec (Y) # Decrement count
if z
ld A (Y I) # Call saved 'get'
call (A)
ld A (Y I) # Skip '\n', '\r'
call (A)
call chunkSize
end
end
pop Y
ret
# (ht:In 'flg . prg) -> any
(code 'In 2)
push X
ld X (E CDR) # Args
ld E (X) # Eval 'flg'
eval
ld X (X CDR) # X on 'prg'
cmp E Nil # 'flg?
if eq # No
prog X # Run 'prg'
else
push Y
ld Y Chunk # Get Chunk
ld (Y I) (Get_A) # Save current 'get'
ld (Get_A) getChunked_A # Set new
call chunkSize
prog X # Run 'prg'
ld (Get_A) (Y I) # Restore 'get'
ld (Chr) 0 # Clear look ahead char
pop Y
end
pop X
ret
(code 'outHexA 0)
cmp A 15 # Single digit?
if gt # No
push A
shr A 4 # Divide by 16
call outHexA # Recurse
pop A
and B 15
end
cmp B 9 # Digit?
if gt # No
add B 39 # Make lower case letter
end
add B (char "0") # Make ASCII digit
jmp (PutB)
(code 'wrChunkY 0) # X
ld (PutB) (Y II) # Restore 'put'
ld A (Y) # Get count
call outHexA # Print as hex
ld B 13 # Output 'return'
call (PutB)
ld B 10 # Output 'newline'
call (PutB)
lea X (Y III) # X on chunk buffer
do
ld B (X) # Next byte from chunk buffer
call (PutB) # Output
inc X # Increment pointer
dec (Y) # Decrement 'Cnt'
until z
ld B 13 # Output 'return'
call (PutB)
ld B 10 # Output 'newline'
call (PutB)
ld (Y II) (PutB) # Save 'put'
ld (PutB) putChunkedB # Set new
ret
(code 'putChunkedB 0)
push X
push Y
ld Y Chunk # Get Chunk
lea X (Y III) # X on chunk buffer
add X (Y) # Count index
ld (X) B # Store byte
inc (Y) # Increment count
cmp (Y) CHUNK # Max reached?
if eq # Yes
call wrChunkY # Write buffer
end
pop Y
pop X
ret
# (ht:Out 'flg . prg) -> any
(code 'Out 2)
push X
ld X (E CDR) # Args
ld E (X) # Eval 'flg'
eval
ld X (X CDR) # X on 'prg'
cmp E Nil # 'flg?
if eq # No
prog X # Run 'prg'
else
push Y
ld Y Chunk # Get Chunk
ld (Y) 0 # Clear count
ld (Y II) (PutB) # Save current 'put'
ld (PutB) putChunkedB # Set new
prog X # Run 'prg'
null (Y) # Count?
if nz # Yes
call wrChunkY # Write rest
end
ld (PutB) (Y II) # Restore 'put'
ld C Newlines # Output termination string
call outStringC
pop Y
end
ld A (OutFile) # Flush OutFile
call flushA_F # OK?
pop X
ret
# vi:et:ts=3:sw=3
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