🚀 go-pugleaf

Reply-To: ihnp4!cbmvax!carolyn@ecn (Carolyn Scheppner)


   I am mailing you some AmigaBasic sources.  Most are LIBRARY demos
which use NewConvertFD'd .bmaps to implement binary loads/saves and
to duplicate C code.  I am also sending the three fd files which
must be NewConvertFD'd to create the .bmaps needed by these programs
and AboutBmaps to explain where things were placed on my disk.
The loader programs suggest names of pics which are on the distribution
copy of my disk.  Users can substitute their own pictures.

- - - - - - - - Cut Here for NewConvertFD - - - - - - - - - - - - 

'Program: ConvertFd - created Aug 9, 1985
'This program converts .fd files, like 'graphics_lib.fd' to
' .bmap format files, like 'graphics.bmap', so BASIC
' programs can access libraries of machine language routines
' by name via the LIBRARY statement.
'
' Modified  01/86 by Carolyn Scheppner  CBM
'   Prepends an x to all function names which
'    conflict with AmigaBasic keywords.
'    See data statements at end of program for
'    known conflicts.  To call these functions,
'    prepend an x  (example  xRead).
'   Saves the .bmap file in current or specified
'    directory (previously saved in LIBS:).
'    For your program to access the .bmap via
'    LIBRARY, it must be in the current dir
'    or the LIBS: dir.
'   As far as I know, you MUST name your .bmap
'    libraryname.bmap.  The libraryname is the
'    part of the .fd file name before the _.
'    (example   dos.bmap from dos_lib.fd)


  DEFINT a-Z    'by default, all variables ares integer

  REM ******** for conflicting tokens ********
  READ cnt       'count of conflicting tokens
  DIM con$(cnt)
  FOR k = 0 TO cnt-1: READ con$(k): NEXT
  REM ****************************************

  INPUT "Enter name of .fd file to read > ",fdFilename$
  OPEN fdFilename$ FOR INPUT AS #1
  INPUT "Enter name of .bmap file to produce > ",bmapFilename$
  OPEN bmapFilename$ FOR OUTPUT AS #2
  WHILE NOT EOF(1)
    GetLine
    IF char$ = "#" THEN
      'lines which begin with "#" are command lines
      GOSUB GotCommand
    ELSEIF char$ = "*" THEN
      'lines which begin with "*" are comment lines
    ELSE
      'all other lines define a function in the library
      GOSUB GotFunction
    END IF
  WEND
  CLOSE
  END

GotCommand:
  GetChar  'skip 1st "#"
  GetChar  'skip 2nd "#"
  GetToken
  IF token$ = "bias" THEN
    GetNum
    offset = -num
  END IF
 ram: RETURN

GotFunction:
  GetToken  'token$=function's name

  REM **** prepend conflicting tokens with 'x' ****
  k$ = token$
  FOR k = 0 TO cnt-1
     IF k$ = con$(k) THEN token$ = "x" + token$ 
  NEXT   
  REM **********************************************

  funcOffset=offset
  offset=offset-6
  parms$=""
  SkipTill "(": IF char$="" THEN BadFileFormat
  SkipTill ")": IF char$="" THEN BadFileFormat
  GetChar
  IF char$<>"" THEN
    SkipTill "(": IF char$="" THEN BadFileFormat
    WHILE char$ <> ")"
      GetChar 'skip ( or , or /
      IF char$<>")" THEN
        GOSUB GetRegister
        IF register=0 THEN BadFileFormat
        IF register=-1 THEN
          PRINT "Warning: Function ";token$;" not included because it"
          PRINT " needs a parameter passed in a register BASIC cannot"
          PRINT " conform to."
          PRINT
          RETURN
        END IF
        parms$ = parms$+CHR$(register)
         'tells BASIC which register to put this parm into
      END IF
    WEND
  END IF
  AddEntry token$,funcOffset
  PRINT #2,parms$;   'tells BASIC what registers to pass parms in
  PRINT #2,CHR$(0);  'marks end of function entry
  RETURN

BadFileFormat:
  PRINT "Error: ";fdFilename$;" has a format error"
  PRINT "In line:";lineNum;":";buf$
  PRINT "In column:";column
  CLOSE
  STOP
  

'map {d0,d1,d2,d3,d4,d5,d6,d7,a0,a1,a2,a3,a4} to {1,..,13}
GetRegister:
  uchar$=UCASE$(char$)
  IF uchar$="D" THEN
    register=1
  ELSEIF uchar$="A" THEN
    register = 9
  ELSE
    register=0  'error
    RETURN
  END IF
  GetChar  'skip a or d
  i=ASC(char$)-48
  IF i<0 OR i>7 THEN register=0: RETURN  'error
  GetChar  'skip digit
  register=register+i
  IF register>13 THEN register=-1  'error
  RETURN

SUB AddEntry(nam$, liboffset%) STATIC
  highByte = PEEK(VARPTR(liboffset%))
  lowByte = PEEK(VARPTR(liboffset%)+1)
  PRINT #2,nam$; CHR$(0); CHR$(highByte); CHR$(lowByte);
  END SUB

SUB GetLine STATIC
  SHARED buf$,column,lineNum
  LINE INPUT #1,buf$
  column = 0
  GetChar
  lineNum = lineNum+1
  END SUB

SUB GetNum STATIC
  SHARED num,token$
  GetToken
  num = VAL(token$)
  END SUB

SUB GetToken STATIC
  SHARED buf$,char$,token$
  SkipWhiteSpace
  token$=""
  uchar$=UCASE$(char$)
  WHILE ((uchar$>="A") AND (uchar$<="Z")) OR ((uchar$>="0") AND (uchar$<="9")) OR (uchar$="-")
    token$=token$+char$
    GetChar
    uchar$ = UCASE$(char$)
  WEND
  END SUB

SUB SkipTill(stopChar$) STATIC
  SHARED char$
  WHILE (char$ <> stopChar$) AND (char$ <> "")
    GetChar
  WEND
  END SUB

SUB SkipWhiteSpace STATIC
  SHARED char$
  WHILE (char$=" ") OR (char$=CHR$(9))
    GetChar
  WEND
  END SUB

SUB GetChar STATIC
  SHARED column,char$,buf$
  column = column + 1
  char$ = MID$(buf$,column,1)
  END SUB
       
REM **** conficting token count and tokens ****                
DATA 11                
DATA abs, Close, Exit, Input, Open, Output
DATA Read, tan, Translate, Wait, Write