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Annotation of 43BSDReno/pgrm/as.tahoe/asscan.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *     Copyright (c) 1982 Regents of the University of California
        !             3:  *     @(#)asscan.h 4.9 6/30/83
        !             4:  */
        !             5: /*
        !             6:  *     The character scanner is called to fill up one token buffer
        !             7:  *
        !             8:  *     However, once the tokens are filled up by the
        !             9:  *     character scanner, they are used in both the first and the second
        !            10:  *     pass.  Holes created by .stab removal are replaced
        !            11:  *     with 'skip' tokens that direct the second pass to ignore the
        !            12:  *     following tokens.
        !            13:  */
        !            14: 
        !            15: #define TOKBUFLG               4096
        !            16: #define MAXTAHOE                       32              
        !            17: #define SAFETY                 16
        !            18: 
        !            19: #define AVAILTOKS              TOKBUFLG -\
        !            20:                sizeof(int) -\
        !            21:                sizeof (struct tokbufdesc *) -\
        !            22:                MAXTAHOE - SAFETY
        !            23: 
        !            24: struct tokbufdesc{
        !            25:        int             tok_count;              /*absolute byte length*/
        !            26:        struct          tokbufdesc *tok_next;
        !            27:        char            toks[AVAILTOKS];
        !            28:        char            bufovf[MAXTAHOE + SAFETY];
        !            29: };
        !            30: /*
        !            31:  *     Definitions for handling tokens in the intermediate file
        !            32:  *     buffers.
        !            33:  *
        !            34:  *     We want to have the compiler produce the efficient auto increment
        !            35:  *     instruction for stepping through the buffer of tokens.  We must
        !            36:  *     fool the type checker into thinking that a pointer can point
        !            37:  *     to various size things.
        !            38:  */
        !            39: 
        !            40: typedef int inttoktype;
        !            41: /* typedef char inttoktype; */
        !            42: typedef char bytetoktype;
        !            43: 
        !            44: typedef char *ptrall;                  /*all uses will be type cast*/
        !            45: typedef u_short lgtype;                        /*for storing length of strings or skiping*/
        !            46: /*
        !            47:  *     defintions for putting various typed values
        !            48:  *     into the intermediate buffers
        !            49:  *     ptr will ALWAYS be of type ptrall
        !            50:  */
        !            51: 
        !            52: #define ptype(type, ptr, val)  \
        !            53:                (ptr) = (char *)((int)((ptr) + sizeof(type)-1)&~(sizeof(type)-1)), \
        !            54:                *(type *)(ptr) = (val), (ptr) += sizeof(type)
        !            55: 
        !            56: #define        pchar(ptr, val)         *(ptr)++  = (val)
        !            57: #define        puchar(ptr, val)        *(ptr)++  = (val)
        !            58: 
        !            59: #define        pshort(ptr, val)        ptype (short, ptr, val)
        !            60: #define        plgtype(ptr, val)       ptype (lgtype, ptr, val)
        !            61: #define        pushort(ptr, val)       ptype (u_short, ptr, val)
        !            62: #define        pint(ptr, val)          ptype (int, ptr, val)
        !            63: #define        puint(ptr, val)         ptype (u_int, ptr, val)
        !            64: #define        plong(ptr, val)         ptype (long, ptr, val)
        !            65: #define        pulong(ptr, val)        ptype (u_int, ptr, val)
        !            66: #define        pnumber(ptr, val)       ptype (Bignum, ptr, val)
        !            67: #define        pptr(ptr, val)          ptype (int, ptr, val)
        !            68: #define        popcode(ptr, val)       *(ptr)++  = (val)
        !            69: #define        ptoken(ptr, val)        *(ptr)++  = (val)
        !            70: #define        pskiplg(ptr, val)       ptype (lgtype, ptr, val)
        !            71: 
        !            72: 
        !            73: #define gtype(type, ptr, val)  \
        !            74:                (ptr) = (char *)((int)((ptr) + sizeof(type)-1)&~(sizeof(type)-1)), \
        !            75:                (val) = *(type *)(ptr)  ,       (ptr) += sizeof(type)
        !            76: 
        !            77: #define        gchar(val, ptr)         (val) = *(ptr)++
        !            78: #define        guchar(val, ptr)        (val) = *(ptr)++
        !            79: 
        !            80: #define        gshort(val, ptr)        gtype (short, ptr, val)
        !            81: #define        glgtype(ptr, val)       gtype (lgtype, ptr, val)
        !            82: #define        gushort(val, ptr)       gtype (u_short, ptr, val)
        !            83: #define        gint(val, ptr)          gtype (int, ptr, val)
        !            84: #define        guint(val, ptr)         gtype (u_int, ptr, val)
        !            85: #define        glong(val, ptr)         gtype (long, ptr, val)
        !            86: #define        gulong(val, ptr)        gtype (u_int, ptr, val)
        !            87: #define        gnumber(val, ptr)       gtype (Bignum, ptr, val)
        !            88: #define        gptr(val, ptr)          gtype (int, ptr, val)
        !            89: #define        gopcode(val, ptr)       (val) = *(ptr)++
        !            90: #define        gtoken(val, ptr)        (val) = *(ptr)++
        !            91: #define        gskiplg(val, ptr)       gtype (lgtype, ptr, val)
        !            92: 
        !            93: 
        !            94: extern ptrall tokptr;  /*the next token to consume, call by copy*/
        !            95: extern ptrall tokub;   /*current upper bound in the current buffer*/

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