Shamusworld >> Repos - rmac/blob - token.h

   1 ////////////////////////////////////////////////////////////////////////////////////////////////////
   2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
   3 // TOKEN.H - Token Handling
   4 // Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
   5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
   6 // Source Utilised with the Kind Permission of Landon Dyer
   7
   8 #ifndef __TOKEN_H__
   9 #define __TOKEN_H__
  10
  11 #include "rmac.h"
  12 //#include "risca.h"
  13
  14 // Include Files and Macros
  15 #define SRC_IFILE       0                                   // Input source is IFILE
  16 #define SRC_IMACRO      1                                   // Input source is IMACRO
  17 #define SRC_IREPT       2                                   // Input source is IREPT
  18
  19 // Macros
  20 #define INOBJ           struct _inobj
  21 #define IUNION          union _iunion
  22 #define IFILE           struct _incldfile
  23 #define IMACRO          struct _imacro
  24 #define IREPT           struct _irept
  25 #define IFENT           struct _ifent
  26
  27 // Tunable definitions
  28 #define LNSIZ           256                                 // Maximum size of a line of text
  29 #define TOKBUFSIZE      400                                 // Size of token-line buffer
  30 #define QUANTUM         4096L                               // #bytes to eat at a time from a file
  31 #define LNBUFSIZ        (QUANTUM*2)                         // Size of file's buffer
  32 #define KWSIZE          7                                   // Maximum size of keyword in kwtab.h
  33
  34 // (Normally) non-printable tokens
  35 #define COLON           ':'                                 // : (grumble: GNUmacs hates ':')
  36 #define CONST           'a'                                 // CONST <value>
  37 #define ACONST          'A'                                 // ACONST <value> <attrib>
  38 #define STRING          'b'                                 // STRING <address>
  39 #define SYMBOL          'c'                                 // SYMBOL <address>
  40 #define EOL             'e'                                 // End of line
  41 #define TKEOF           'f'                                 // End of file (or macro)
  42 #define DEQUALS         'g'                                 // ==
  43 #define SET             149                                 // Set
  44 #define REG             'R'                                 // Reg
  45 #define DCOLON          'h'                                 // ::
  46 #define GE              'i'                                 // >=
  47 #define LE              'j'                                 // <=
  48 #define NE              'k'                                 // <> or !=
  49 #define SHR             'l'                                 // >>
  50 #define SHL             'm'                                 // <<
  51 #define UNMINUS         'n'                                 // Unary '-'
  52 #define DOTB            'B'                                 // .b or .B or .s or .S
  53 #define DOTW            'W'                                 // .w or .W
  54 #define DOTL            'L'                                 // .l or .L
  55 #define DOTI            'I'                                 // .l or .L
  56 #define ENDEXPR         'E'                                 // End of expression
  57
  58 // ^^ operators
  59 #define CR_DEFINED      'p'                                 // ^^defined - is symbol defined?
  60 #define CR_REFERENCED   'q'                                 // ^^referenced - was symbol referenced?
  61 #define CR_STREQ        'v'                                 // ^^streq - compare two strings
  62 #define CR_MACDEF       'w'                                 // ^^macdef - is macro defined?
  63 #define CR_TIME         'x'                                 // ^^time - DOS format time
  64 #define CR_DATE         'y'                                 // ^^date - DOS format date
  65
  66 // Character Attributes
  67 #define ILLEG           0                                   // Illegal character (unused)
  68 #define DIGIT           1                                   // 0-9
  69 #define HDIGIT          2                                   // A-F, a-f
  70 #define STSYM           4                                   // A-Z, a-z, _~.
  71 #define CTSYM           8                                   // A-Z, a-z, 0-9, _~$?
  72 #define SELF            16                                  // Single-character tokens: ( ) [ ] etc
  73 #define WHITE           32                                  // Whitespace (space, tab, etc.)
  74 #define MULTX           64                                  // Multiple-character tokens
  75 #define DOT             128                                 // [bwlsBWSL] for what follows a `.'
  76
  77 // Conditional assembly structures
  78 IFENT {
  79    IFENT *if_prev;                                          // Ptr prev .if state block (or NULL)
  80    WORD if_state;                                           // 0:enabled, 1:disabled
  81 };
  82
  83 // Pointer to IFILE or IMACRO
  84 IUNION {
  85    IFILE *ifile;
  86    IMACRO *imacro;
  87    IREPT *irept;
  88 };
  89
  90 // Ptr to IFILEs, IMACROs, and so on; back-ptr to previous input objects
  91 INOBJ {
  92    WORD in_type;                                            // 0=IFILE, 1=IMACRO ...
  93    IFENT *in_ifent;                                                 // Pointer to .if context on entry
  94    INOBJ *in_link;                                                  // Pointer to previous INOBJ
  95    TOKEN *in_otok;                                                  // Old `tok' value
  96    TOKEN *in_etok;                                                  // Old `etok' value
  97    IUNION inobj;                                                            // IFILE or IMACRO ...
  98 };
  99
 100 // Information about a file
 101 IFILE {
 102    IFILE *if_link;                                          // Pointer to ancient IFILEs
 103    char *ifoldfname;                                        // Old file's name
 104    int ifoldlineno;                                         // Old line number
 105    int ifind;                                               // Position in file buffer
 106    int ifcnt;                                               // #chars left in file buffer
 107    int ifhandle;                                            // File's descriptor
 108    WORD ifno;                                               // File number
 109    char ifbuf[LNBUFSIZ];                                    // Line buffer
 110 };
 111
 112 // Information about a macro invocation
 113 IMACRO {
 114    IMACRO *im_link;                                         // Pointer to ancient IMACROs
 115    LONG *im_nextln;                                         // Next line to include
 116    WORD im_nargs;                                           // # of arguments supplied on invocation
 117    WORD im_siz;                                             // Size suffix supplied on invocation
 118    LONG im_olduniq;                                         // Old value of 'macuniq'
 119    SYM *im_macro;                                           // Pointer to macro we're in
 120    char im_lnbuf[LNSIZ];                                    // Line buffer
 121 };
 122
 123 // Information about a .rept invocation
 124 IREPT {
 125    LONG *ir_firstln;                                        // Pointer to first line
 126    LONG *ir_nextln;                                         // Pointer to next line
 127    VALUE ir_count;                                          // Repeat count (decrements)
 128 };
 129
 130 // Globals, externals etc
 131 extern int lnsave;
 132 extern int curlineno;
 133 extern char *curfname;
 134 extern WORD cfileno;
 135 extern TOKEN *tok;
 136 extern char lnbuf[];
 137 extern char lntag;
 138 extern char tolowertab[];
 139 extern INOBJ *cur_inobj;
 140 extern unsigned orgactive;
 141 extern unsigned orgaddr;
 142 extern LONG sloc;
 143 extern int mjump_align;
 144
 145 // Prototypes
 146 int include(int, char *);
 147 void init_token(void);
 148 void setfnum(WORD);
 149 int tokln(void);
 150 int fpop(void);
 151 //int d_goto(WORD);
 152 int d_goto(void);
 153 INOBJ *a_inobj(int);
 154
 155 #endif // __TOKEN_H__