mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Sapphire/sail/sh/var

   1 ;
   2 ; var.sh
   3 ;
   4 ; Variable handling
   5 ;
   6 ; © 1995 Straylight
   7 ;
   8
   9 ;----- Overview -------------------------------------------------------------
  10 ;
  11 ; Functions provided:
  12 ;
  13 ;  var_create
  14 ;  var_find
  15
  16                 [       :LNOT::DEF:var__dfn
  17                 GBLL    var__dfn
  18
  19 ; --- var_create ---
  20 ;
  21 ; On entry:     R0 == type of variable
  22 ;               R1 == pointer to variable name
  23 ;               R2 == file address of label or DEF
  24 ;               R3 == line number of label or DEF
  25 ;               R12 == pointer to the anchor block
  26 ;
  27 ; On exit:      R0 == pointer to the variable
  28 ;               May return an error
  29 ;
  30 ; Use:          Tries to find the variable given, and return a pointer
  31 ;               to it if it is found. Otherwise it will try to create the
  32 ;               variable and return a pointer to the new one.
  33
  34                 IMPORT  var_create
  35
  36 ; --- var_find ---
  37 ;
  38 ; On entry:     R0 == type of the variable
  39 ;               R1 == name of the variable
  40 ;
  41 ; On exit:      CS if the variable was found, and
  42 ;                 R0 == pointer to the variable block
  43 ;               CC otherwise
  44 ;
  45 ; Use:          Tries to find the given variable in the current tree.
  46
  47                 IMPORT  var_find
  48
  49 ;----- Workspace ------------------------------------------------------------
  50
  51                 ; --- Variable types ---
  52
  53                 ^       0
  54 vType_integer   #       1                       ;Integer
  55 vType_string    #       1                       ;String
  56 vType_dimInt    #       1                       ;DIM of integers
  57 vType_dimStr    #       1                       ;DIM of strings
  58 vType_label     #       1                       ;Label
  59 vType_proc      #       1                       ;Procedure name
  60 vType_fn        #       1                       ;Function name
  61
  62                 ; --- Lvalue types ---
  63
  64 vType_lvInt     #       1                       ;Integer variable lvalue
  65 vType_lvString  #       1                       ;String variable lvalue
  66 vType_lvWord    #       1                       ;Word lvalue (from `!' op)
  67 vType_lvByte    #       1                       ;Byte lvalue (from `?' op)
  68 vType_lvBytes   #       1                       ;String lvalue (from `$' op)
  69 vType_lvIntArr  #       1                       ;Integer array lvalue
  70 vType_lvStrArr  #       1                       ;String array lvalue
  71
  72                 ]
  73
  74 ;----- That's all, folks ----------------------------------------------------
  75
  76                 END