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- ; Various routines used for manipulating extended attributes. Used by EPM.
-
- const
- EAT_ASCII = \253\255 -- FFFD
- EAT_MVMT = \223\255 -- FFDF
-
- ; Returns 1 if attribute name exists; sets VAR args. EA_SEG, EA_OFS =
- ; start of EA buffer. EA_PTR1, 2 = pointers to start of entry and value,
- ; respectively, if name was found. EA_LEN, EA_ENTRYLEN, EA_VALUELEN = length
- ; of EA area, of entry, and of value, respectively.
- ; Dependencies: None
- defproc find_ea(name, var ea_seg, var ea_ofs, var ea_ptr1, var ea_ptr2, var ea_len, var ea_entrylen, var ea_valuelen) =
- ea_long = atol(.eaarea)
- ; ea_seg = itoa(rightstr(ea_long,2),10)
- ea_seg = ltoa(rightstr(ea_long,2)\0\0,10)
- ; ea_ofs = itoa(leftstr(ea_long,2),10)
- ea_ofs = ltoa(leftstr(ea_long,2)\0\0,10)
- if not .eaarea then return ''; endif
- ea_len = ltoa(peek(ea_seg, ea_ofs, 4),10)
- ea_end = ea_ofs + ea_len
- ea_ptr1 = ea_ofs + 4 -- Point past length of FEAList
- do while ea_ptr1 < ea_len
- ; ea_flag = itoa(peek(ea_seg, ea_ptr1, 1)\0,16)
- ea_namelen = asc(peek(ea_seg, ea_ptr1+1, 1))
- ; ea_valuelen = itoa(peek(ea_seg, ea_ptr1+2, 2),10)
- ea_valuelen = ltoa(peek(ea_seg, ea_ptr1+2, 2)\0\0,10)
- ea_entrylen = ea_namelen + 5 + ea_valuelen
- if name = peekz(ea_seg, ea_ptr1+4) then
- ea_ptr2 = ea_ptr1+5+ea_namelen -- Point to start of EA value
- return 1
- endif
- ea_ptr1 = ea_ptr1 + ea_entrylen -- Point to start of next entry
- enddo
-
-
- ; Dependencies: None
- defc addea, add_ea = -- Adds a single name / value pair to an existing EA list
- parse arg name data
- if name='' then
- sayerror 'ADD_EA <name> <value> adds the extended attribute value specified to the current file.'
- return
- endif
- name_len = length(name)
- data_len = length(data)
- ea_len_incr = 9 + name_len + data_len
- if .eaarea then
- ea_long = atol(.eaarea)
- ; ea_seg = itoa(rightstr(ea_long,2),10)
- ea_seg = ltoa(rightstr(ea_long,2)\0\0,10)
- ; ea_ofs = itoa(leftstr(ea_long,2),10)
- ea_ofs = ltoa(leftstr(ea_long,2)\0\0,10)
- ea_old_len = ltoa(peek(ea_seg, ea_ofs, 4),10)
- r = dynalink('DOSCALLS', -- Dynamic link library name
- '#38', -- DosReAllocSeg
- atoi(ea_old_len+ea_len_incr) || -- Number of bytes requested
- rightstr(ea_long,2) )
- ea_ptr = ea_seg
- else
- ea_buffer = "00" -- Initialize string pointer.
- r = dynalink('DOSCALLS', -- Dynamic link library name
- '#34', -- DosAllocSeg
- atoi(ea_len_incr+4) || -- Number of bytes requested
- selector(ea_buffer) || -- String selector
- offset(ea_buffer) || -- String offset
- atoi(0) ) -- Share information
- ; ea_ptr = itoa(ea_buffer,10)
- ea_ptr = ltoa(ea_buffer\0\0,10)
- ea_ofs = 0
- ea_old_len = 4 -- Point past length field
- endif
-
- if r then sayerror ERROR__MSG r ALLOC_HALTED__MSG; stop; endif
- poke ea_ptr, ea_ofs, atol(ea_old_len+ea_len_incr)
- ea_ofs = ea_ofs + ea_old_len
- poke ea_ptr, ea_ofs , \0 -- Start of EA: flag byte
- poke ea_ptr, ea_ofs+1, chr(name_len)
- poke ea_ptr, ea_ofs+2, atoi(data_len + 4) -- Value length = len(data) + len(data_type) + len(data_len)
- poke ea_ptr, ea_ofs+4, name
- poke ea_ptr, ea_ofs+4+name_len, \0 -- Null byte after name
- poke ea_ptr, ea_ofs+5+name_len, EAT_ASCII
- poke ea_ptr, ea_ofs+7+name_len, atoi(data_len)
- poke ea_ptr, ea_ofs+9+name_len, data
- .eaarea = mpfrom2short(ea_ptr,0)
-
-
- ; Dependencies: find_ea
- defproc get_EAT_ASCII_value(name) = -- Returns the value for a given attribute name
- if find_ea(name, ea_seg, ea_ofs, ea_ptr1, ea_ptr2, ea_len, ea_entrylen, ea_valuelen) then
- stuff = peek(ea_seg, ea_ptr2, min(ea_valuelen,4))
- if leftstr(stuff,2) = EAT_ASCII & ea_valuelen > 4 then
- return peek(ea_seg, ea_ptr2+4, min(itoa(substr(stuff,3,2),10),MAXCOL))
- endif
- endif
-
-
- ; Dependencies: find_ea()
- defproc delete_ea(name) =
- parse arg name .
- if not find_ea(name, ea_seg, ea_ofs, ea_ptr1, ea_ptr2, ea_len, ea_entrylen, ea_valuelen) then
- return
- endif
- newlen = ea_len - ea_entrylen
- poke ea_seg, ea_ofs, atol(newlen)
- compile if EVERSION < '5.21'
- junk = 'junk' -- Avoid problem due to bug in MEMCPYX in EPM 5.20
- compile endif
- if ea_ptr1+ea_entrylen < ea_len then -- If in the middle, close it up
- call memcpyx(atoi(ea_ptr1) || atoi(ea_seg), atoi(ea_ptr1+ea_entrylen) || atoi(ea_seg), ea_len - ea_ptr1 - ea_entrylen)
- endif
- call dynalink('DOSCALLS', -- Dynamic link library name
- '#38', -- DosReAllocSeg
- atoi(newlen) || -- Number of bytes requested
- atoi(ea_seg) )
-
-
- ; Dependencies: find_ea(), delete_ea(), add_ea
- defc type =
- found = find_ea('.TYPE', ea_seg, ea_ofs, ea_ptr1, ea_ptr2, ea_len, ea_entrylen, ea_valuelen)
- if not found | ea_valuelen=0 then
- answer = winmessagebox(TYPE_TITLE__MSG, NO_FILE_TYPE__MSG, 16388) -- YESNO + MOVEABLE
- elseif peek(ea_seg, ea_ptr2, 2)=EAT_ASCII then
- ; type = peek(ea_seg, ea_ptr2+4, min(itoa(peek(ea_seg, ea_ptr2+2, 2), 10), MAXCOL))
- type = peek(ea_seg, ea_ptr2+4, min(ltoa(peek(ea_seg, ea_ptr2+2, 2)\0\0, 10), MAXCOL))
- answer = winmessagebox(TYPE_TITLE__MSG, ONE_FILE_TYPE__MSG\13 type\13\13CHANGE_QUERY__MSG, 16388) -- YESNO + MOVEABLE
- elseif peek(ea_seg, ea_ptr2, 2)=EAT_MVMT then
- ; ea_numentries = itoa(peek(ea_seg, ea_ptr2+4, 2),10)
- ea_numentries = ltoa(peek(ea_seg, ea_ptr2+4, 2)\0\0,10)
- if ea_numentries=1 then
- type = ONE_FILE_TYPE__MSG
- else
- type = MANY_FILE_TYPES__MSG
- endif
- ea_entry_ofs = ea_ptr2+6
- do i=1 to ea_numentries
- ; ea_entrylen = itoa(peek(ea_seg, ea_entry_ofs+2, 2),10)
- ea_entrylen = ltoa(peek(ea_seg, ea_entry_ofs+2, 2)\0\0,10)
- if peek(ea_seg, ea_entry_ofs, 2)=EAT_ASCII then
- type = type\13 || peek(ea_seg, ea_entry_ofs+4,min(ea_entrylen,MAXCOL))
- else
- type = type\13 || NON_ASCII__MSG
- endif
- ea_entry_ofs = ea_entry_ofs + ea_entrylen + 4
- enddo
- answer = winmessagebox(TYPE_TITLE__MSG, type\13\13CHANGE_QUERY__MSG, 16388) -- YESNO + MOVEABLE
- else
- answer = winmessagebox(TYPE_TITLE__MSG, NON_ASCII_TYPE__MSG\13CHANGE_QUERY__MSG, 16388) -- YESNO + MOVEABLE
- endif
- if answer=6 then
- compile if EVERSION < 5.21
- newtype = listbox(SELECT_TYPE__MSG, TYPE_LIST__MSG)
- if newtype then
- compile else
- parse value listbox(TYPE_TITLE__MSG, TYPE_LIST__MSG, '/'SET__MSG'/'CANCEL__MSG'/'HELP__MSG, 0, 0, 0, 0,
- atoi(1) || atoi(1) || atoi(6040) || gethwndc(APP_HANDLE) ||
- SELECT_TYPE__MSG) with button 2 newtype \0
- if newtype & (button=\1) then
- compile endif
- if found then call delete_ea('.TYPE'); endif
- 'add_ea .TYPE' newtype
- endif
- endif
-
-
- ; Dependencies: find_ea(), delete_ea(), add_ea
- defc subject =
- found = find_ea('.SUBJECT', ea_seg, ea_ofs, ea_ptr1, ea_ptr2, ea_len, ea_entrylen, ea_valuelen)
- subj = ''
- if not found | ea_valuelen=0 then
- answer = winmessagebox(SUBJ_TITLE__MSG, NO_SUBJECT__MSG, 16388) -- YESNO + MOVEABLE
- elseif peek(ea_seg, ea_ptr2, 2)=EAT_ASCII then
- ; subj = peek(ea_seg, ea_ptr2+4, min(itoa(peek(ea_seg, ea_ptr2+2, 2), 10), MAXCOL))
- subj = peek(ea_seg, ea_ptr2+4, min(ltoa(peek(ea_seg, ea_ptr2+2, 2)\0\0, 10), MAXCOL))
- answer = winmessagebox(SUBJ_TITLE__MSG, SUBJECT_IS__MSG\13 subj\13\13||CHANGE_QUERY__MSG, 16388) -- YESNO + MOVEABLE
- else
- answer = winmessagebox(SUBJ_TITLE__MSG, NON_ASCII_SUBJECT__MSG\13||CHANGE_QUERY__MSG, 16388) -- YESNO + MOVEABLE
- endif
- if answer=6 then
- compile if EVERSION < 5.21 -- The old way
- newsubj = entrybox(SELECT_SUBJECT__MSG, '', subj, 40, 40)
- if newsubj then
- compile else
- parse value entrybox(SUBJ_TITLE__MSG, '/'SET__MSG'/'CANCEL__MSG'/'HELP__MSG, subj, 40, 40,
- atoi(1) || atoi(6050) || gethwndc(APP_HANDLE) || SELECT_SUBJECT__MSG) with button 2 newsubj \0
- if newsubj & (button=\1) then
- compile endif
- if found then call delete_ea('.SUBJECT'); endif
- 'add_ea .SUBJECT' newsubj
- endif
- endif
-