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Digital-Research-Source-Code/CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v102a/c068/parser.h
Sepp J Morris 31738079c4 Upload 
Digital Research
2020-11-06 18:50:37 +01:00

496 lines
16 KiB
C
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/*
Copyright 1983
Alcyon Corporation
8716 Production Ave.
San Diego, Ca. 92121
*/
/**
* C68 Parser - include file
**/
#include "machine.h"
#ifdef WHITESM
# define NOPROFILE
# define VAX11
# include <stdio.h>
# include <klib.h>
# undef putchar
# define putchar xputchar
# undef ferror
# define ferror xferror
# define printf xprintf
#endif
#ifdef CPM
# define NOPROFILE
# include <stdio.h>
# include <klib.h>
# undef putchar
# define putchar xputchar
# undef ferror
# define ferror xferror
# define printf xprintf
#endif
#ifndef DECC
# include "icode.h"
#else
# define NOPROFILE
# define VAX11
/* ICODE functionally equivilent to icode.h, vprintf equivilent to printf */
# include "ICODE"
# define printf vprintf
#endif
#ifdef VERSADOS
# define NOPROFILE
#endif
/*symbol attribute fields*/
#define SRESWORD 001 /*is symbol a reserved word?*/
#define SGLOBAL 002 /*is symbol global?*/
#define STYPEDEF 004 /*typedef declaration?*/
#define SDEFINED 010 /*symbol defined?*/
/*reserved words*/
#define R_AUTO 1
#define R_BREAK 2
#define R_CASE 3
#define R_CHAR 4
#define R_CONTINUE 5
#define R_DO 6
#define R_DEFAULT 7
#define R_DOUBLE 8
#define R_GOTO 9
#define R_ELSE 10
#define R_EXTERNAL 11
#define R_FLOAT 12
#define R_FOR 13
#define R_IF 14
#define R_INT 15
#define R_LONG 16
#define R_REGISTER 17
#define R_RETURN 18
#define R_SHORT 19
#define R_SIZEOF 20
#define R_STATIC 21
#define R_STRUCT 22
#define R_SWITCH 23
#define R_TYPEDEF 24
#define R_UNION 25
#define R_UNSIGNED 26
#define R_WHILE 27
#define R_ASM 28
/*
* mixed-mode conversions, entries in 2-d array indexed by:
* (int,unsn,long,doub,ptr)
*/
#define INT_CHAR 1
#define UNSN_CHAR 1
#define LONG_CHAR 1
#define DOUB_CHAR 1
#define PTR_CHAR 1
#define INT_UNSN 0 /*no conversion is generated*/
#define INT_LONG 2
#define INT_DOUB 3
#define INT_PTR 4
#define UNSN_INT 0 /*no conversion is generated*/
#define UNSN_LONG 6
#define UNSN_DOUB 7
#define UNSN_PTR 8
#define LONG_INT 9
#define LONG_UNSN 10
#define LONG_DOUB 11
#define LONG_PTR 12
#define DOUB_INT 13
#define DOUB_UNSN 14
#define DOUB_LONG 15
#define PTR_INT 16
#define PTR_UNSN 17
#define PTR_LONG 18
#define PTR_PTR 19
#define BADCONV 20
/* miscellaneous constants */
#define OPSSIZE 40 /*operator stack size*/
#define OPDSIZE 80 /*operand stack size*/
#define HSIZE 512 /*hash table size, 3.4 made prime */
#define BSIZE 512 /*io buffer size */
#define SWSIZE 256 /*max no. of cases in a switch*/
#define DSIZE 1000 /*dimension table size*/
#define BITSPWORD 16 /*bits per word*/
#define AREGLO 010 /*A reg flag*/
#define DREG 0100 /*data loadable into D-register?*/
#define HICREG 2 /*highest reg # used for code gen*/
#define BITSPCHAR 8 /*bits per char*/
#define CHRSPWORD 2 /*chars per word*/
#define STRSIZE 300 /*max string length*/
#define NFARGS 40 /*max no. of args to function*/
#define NFRSTR 128 /*max no. of forward ref struct proto*/
#define PATHSIZE 128
#define SCOPE_LEVLS 50 /* [vlh] 4.2, # of scope levels */
#define GLOB_SCOPE 0 /* [vlh] 4.2, global level is 0 */
#define FUNC_SCOPE 1 /* [vlh] 4.2, function level is 1 */
#define STDERR 2 /* [vlh] 4.2, error ==> STDERR... */
#ifndef PDP11
# define SYMSIZE 1024 /*size to alloc for symbol structures*/
#else
# define SYMSIZE 128
#endif
/*symbol table node*/
struct symbol {
char s_attrib; /* defined, resword, global, typedef */
char s_sc; /* auto, static, external, register */
short s_type; /* 4bits specified, 2 bit fields for ptr */
short s_dp; /* index into dimension table */
short s_ssp; /* dimension table/function arg table */
short s_offset; /* offset inside of structure */
short s_scope; /* [vlh] 4.2 scope of symbol */
char s_symbol[SSIZE]; /* symbol identifier, to SSIZE chars */
#ifndef SYM_TO_DSK
struct symbol *s_par; /* if struct, ptr to parent (sys III) */
struct symbol *s_child; /* if struct, ptr to 1st child (sys III) */
struct symbol *s_sib; /* if struct, ptr to sibling (sys III) */
struct symbol *s_next; /* next symbol table entry */
#else
long s_par; /* if struct, ptr to parent (sys III) */
long s_child; /* if struct, ptr to 1st child (sys III) */
long s_sib; /* if struct, ptr to sibling (sys III) */
long s_next; /* next symbol table entry */
#endif
};
/*expression tree operator node*/
struct tnode {
short t_op;
short t_type;
short t_dp;
short t_ssp;
struct tnode *t_left;
struct tnode *t_right;
};
/*expression tree node for symbol - only keeps location*/
struct symnode {
short t_op;
short t_type; /*data type of symbol*/
short t_dp; /*dimension pointer of symbol*/
short t_ssp; /*structure size index to dtab*/
short t_sc; /*storage class of symbol*/
short t_offset; /*offset of symbol*/
short t_label;
};
/*expressioon tree node for external symbol - need to keep name*/
struct extnode {
short t_op;
short t_type;
short t_dp;
short t_ssp;
short t_sc;
short t_offset;
short t_reg;
short t_symbol[SSIZE]; /*symbol name*/
};
/*expression tree node for integer constant*/
struct conode {
short t_op;
short t_type;
short t_dp;
short t_ssp;
short t_value; /*constant value*/
};
/* long constant node structure */
struct lconode {
short t_op;
short t_type;
short t_dp;
short t_ssp;
long t_lvalue; /*constant value*/
};
/* key word table */
struct resword {
char *r_name;
int r_value;
} reswords[];
/* switch table structure */
struct swtch {
#ifndef VAX11
short sw_label;
short sw_value;
#else
short sw_label;
short sw_value;
#endif
} swtab[SWSIZE];
/*operator and operand stack used by expr*/
struct ops { /*operator stack*/
short o_op; /*operator*/
short o_pri; /*priority*/
} opstack[OPSSIZE], *opp;
/*output buffers for intermediate code and strings*/
struct iob {
int fd;
int cc;
char *cp;
char cbuf[BSIZE];
} obuf, lbuf, sbuf, ibuf, *obp;
/* Symbols Used by the on disk symbol table handler */
#ifdef SYM_TO_DSK
long dsk_offset; /* location for next symbol entry */
struct symbol volatile; /* very temporary structure */
struct symbol csp_entry; /* symbol storage space */
struct symbol dsp_entry; /* symbol storage space */
struct symbol tdp_entry; /* symbol storage space */
long csp_addr, dsp_addr; /* location....... */
long tdp_addr;
int dsk_fd;
char dskfile[];
#endif
/* Miscellaneous Variables for declarations */
short scope_decls[SCOPE_LEVLS]; /*[vlh] 4.2 decls at this scope ?? */
short scope_level; /*[vlh] 4.2, global=0, func=1 */
short indecl; /*[vlh] 4.2, are we in a decl ?? */
short predecl; /*[vlh] 4.2, value previous to sizeof */
short tdflag; /*declaration is a typedef proto*/
struct symbol *tdp; /*points to typedef prototype*/
short localsize; /*length of local variables*/
short naregs; /*keeps track of ptr registers alloc'd*/
short ndregs; /*keep track of data registers alloc'd*/
short boffset; /*current bit offset in structure*/
short in_struct; /*set when in structure declaration*/
/* Miscellaneous Variables for expression handling */
short opdotsave; /* vars used by the expression evaluator */
short opdontop; /*op on top of expr stack ?? */
short strassign;
char *opdsave, *oprsave;
char *opdstack[OPDSIZE]; /*operand stack*/
char **opdp; /*operand stack pointer*/
char *opap; /*ptr to next avail loc in exprarea*/
short opinfo[]; /*operator info table*/
short commastop; /*stop parse at comma*/
short colonstop; /*stop parse at colon*/
/* Miscellaneous Variables for statement generation */
short cswp; /*current low switch table index*/
short clabel; /*continue label*/
short blabel; /*break label*/
short rlabel; /*return label*/
short dlabel; /*default label*/
/* Miscellaneous Variables */
short lineno; /*current line number of input*/
short lst_ln_id; /*[vlh] 4.2 last line an id was output on...*/
short cr_last; /* determine if # is file specification */
short errcnt; /*count of errors*/
char source[PATHSIZE]; /*[vlh]source filename for err rpting*/
short strassign;
struct tnode *frp; /*pointer to function return info node*/
short smember; /*set when seen . or ->*/
short instmt; /*[vlh] 4.1 in a stmt*/
short infunc; /*set when in function body*/
short reducep; /*[vlh] if(procid); reduction*/
short peektok; /*peeked at token*/
/* Parser Variables which are initialized in parser.ext */
extern char *exprp; /*place to start building expression*/
extern short swp; /*current entry in switch table*/
extern short nextlabel; /*generates unique label numbers*/
extern short structlabel; /*generates unique label names*/
extern char dinfo[];
extern char aregtab[];
extern char dregtab[];
/* Parser flags */
short eflag; /*[vlh] 3.4 IEEE floats */
short fflag; /*[vlh] 3.4 FFP floats */
short gflag; /*[vlh] 4.2 symbolic debugger flag */
short xflag; /*translate int's to long's*/
short tflag; /*[vlh] 4.1, put strings into text seg*/
short wflag; /*[vlh] don't generate warning mesgs*/
#ifndef NOPROFILE
short profile; /*[vlh] 4.3, profiler output */
#endif
#ifdef DEBUG
short debug; /*[vlh] 4.1, debug flag */
short initdebug; /*[vlh] 4.2, init debug flag */
short symdebug; /*[vlh] 4.2, sym debug flag */
short treedebug; /*[vlh] 4.2, expr tree debug flag */
#endif
/*dimension table*/
long dtab[DSIZE]; /* [vlh] 3.4 short => long */
short cdp; /*next entry in dtab to alloc*/
/*lexical analyzer values*/
short cvalue; /*current token if keyword or CINT*/
short ccbytes; /*number of bytes in char constant*/
short cstrsize; /*current string size*/
long clvalue; /*current token value if long constant*/
struct symbol *csp; /*current token symbol ptr if SYMBOL*/
char cstr[STRSIZE]; /*current token value if CSTRING*/
struct symbol *dsp; /*declarator symbol pointer*/
/* 0 no structure */
#ifndef SYM_TO_DSK
struct symbol *struc_parent[10];/*[vlh] ptrs to struc symbols*/
struct symbol *struc_sib[10]; /*[vlh] ptrs to struc symbols*/
struct symbol *hold_sib; /*[vlh] wrap sib past struct decl*/
#else
long struc_parent[10]; /*[vlh] address of struc symbols*/
long struc_sib[10]; /*[vlh] address of struc symbols*/
long hold_sib; /*[vlh] wrap sib past struct decl*/
#endif
/*function argument table, used to collect function parameters*/
struct farg {
#ifndef SYM_TO_DSK
struct symbol *f_sp;
#else
long f_sp;
#endif
short f_offset;
} fargtab[NFARGS];
/*forward referenced structure prototype names*/
#ifndef SYM_TO_DSK
struct symbol *frstab[NFRSTR];
#else
long *frstab[NFRSTR];
#endif
short frstp;
/* Macro's used by the Parser */
#define ISTYPEDEF(sp) (sp->s_attrib&STYPEDEF)
#define WALIGN(add) ((add+1)&(~1))
#define ISARRAY(type) ((type&SUPTYP)==ARRAY)
#define ISFUNCTION(type) ((type&SUPTYP)==FUNCTION)
#define ISPOINTER(type) ((type&SUPTYP)==POINTER)
#define NOTARRAY(type) ((type&SUPTYP)!=ARRAY)
#define NOTFUNCTION(type) ((type&SUPTYP)!=FUNCTION)
#define NOTPOINTER(type) ((type&SUPTYP)!=POINTER)
#define BTYPE(type) (type&TYPE)
#define SUPTYPE(type) (type&SUPTYP)
#define ISALLTYPE(type) (type&(SUPTYP|TYPE))
#define ASGNOP(op) ((opinfo[op]&OPASSIGN)!=0)
#define RELOP(op) ((opinfo[op]&OPREL)!=0)
#define COMOP(op) ((opinfo[op]&OPCOM)!=0)
#define LINTEGRAL(op) ((opinfo[op]&OPLWORD)!=0)
#define RINTEGRAL(op) ((opinfo[op]&OPRWORD)!=0)
#define RASOP(op) ((opinfo[op]&OPRAS)!=0)
#define BINOP(op) ((opinfo[op]&OPBIN)!=0)
#define UNARYOP(op) ((opinfo[op]&OPBIN)==0)
#define LEAF(op) ((opinfo[op]&OPTERM)!=0)
#define LVALOP(op) ((opinfo[op]&OPLVAL)!=0)
#define OPPRIORITY(op) (opinfo[op]&OPPRI)
#define SIMPLE_TYP(typ) ((typ>=CHAR) && (typ<=DOUBLE))
/* checks for symbol with structure element storage class */
#define ISSTEL(tp) (tp->t_op==SYMBOL && (SESC(tp)))
#define SESC(x) (x->t_sc==STELCL||x->t_sc==UNELCL||x->t_sc==BFIELDCL)
/* peek at next token, if not read token put back, else delete */
/* 1 if matched, 0 otherwise */
#define PEEK(tok) ( (peektok=gettok(0)) == tok )
/* outbentry - output symbol '%', signifying routine entry, for link info */
#define OUTBENTRY() printf("%%\n")
#define OUTCOMMON(sym,size) printf("\t.comm _%.8s,%ld\n",sym,size)
#define OUTGOTO(lab) if( lab > 0 ) printf("\tbra L%d\n",lab)
/* change to text segment */
#define OUTTEXT() printf("\t.text\n")
/* change segment to bss */
#define OUTBSS() printf("\t.bss\n")
/* get on a word boundary */
#define OUTEVEN() printf("\t.even\n")
/* output global symbol references */
#define OUTEXTDEF(sym) printf("\t.globl _%.8s\n",sym)
/* outputs reserved memory [vlh] 3.4 %d => %ld */
#define OUTRESMEM(size) printf("\t.ds.b %ld\n",size)
/* output padding for word alignments */
#define OUTPAD() printf("\t.even\n")
/* output long constant to assembler */
#define OUTLCON(val) printf("\t.dc.l %ld\n",val)
/* output label constant */
#define OUTCLAB(lab) printf("\t.dc.l L%d\n",lab)
/* output a label */
#define OUTLAB(lab) printf("\tL%d:",lab)
/* output function label */
#define OUTFLAB(sym) printf("\t_%.8s:\n\t~~%.8s:\n",sym,sym)
#ifndef NOPROFILE
/* output function label */
#define OUTPCALL(sym) printf("\tmove.l _%.8s,(sp)\n\tjsr ___popen\n",sym)
#endif
/* output data label */
#define OUTDLAB(sym) printf("\t_%.8s:\n",sym)
/* output a null tree */
#define OUTNULL() printf("0\n")
/* Debugging Macros */
#ifdef DEBUG
# define PUTEXPR(dbg,id_str,node_ptr) if (dbg) putexpr(id_str,node_ptr)
#else
# define PUTEXPR(dbg,id_str,node_ptr)
#endif
/* On Disk Symbol Table macro */
#ifdef SYM_TO_DSK
# define TO_DSK(symp,addr) write_st(symp,addr)
# define READ_ST(symp,addr) read_st(symp,addr)
# define ZERO_DSP() dsp_addr = dsp = 0;
#else
# define TO_DSK(symp,addr)
# define READ_ST(symp,addr)
# define ZERO_DSP() dsp = 0
#endif
/*functions returning pointers*/
char *expr();
char *talloc();
char *tnalloc();
char *enalloc();
char *snalloc();
char *cnalloc();
char *lcnalloc();
char *fpcnalloc();
char *popopd();
char *cvopgen();
char *arrayref();
char *funcref();
char *install();
char *lookup();
char *balpar();
char *get_symbol(); /* [vlh] 4.2 split from expr() */
char *sbrk();
char *mktemp();
long initlist();
long dsize();
long psize();
long dodecl();
long dlist();
long getdec();
long gethex();
long getoct();
long getfp();
long toieee();
long toffp();
long cexpr();
long s_or_a();
long str_init();
long outstr();
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