/*********************************************************************/
/*                                                                   */
/*   This C compiler is copied from Dr. Dobb's Journal of Computer   */
/*        Calisthenics & Orthodontia (issue number 45)               */
/*   -- Distribution and use is unrestricted for non-commercial use. */
/*                                                                   */
/*                                                 RAF 8-8-80        */
/*                                                                   */
/*********************************************************************/

/************************************************/
/*                                              */
/*             small-c compiler                 */
/*                 rev. 1.1                     */
/*               by Ron Cain                    */
/*                                              */
/************************************************/

/*      Define system dependent parameters      */

/*      Stand-alone definitions                 */

#define BUFSIZ	1030
#define ERROR	-1
#define FALSE	0
#define TRUE	1
#define eol 	13	
#define CR	13	
#define LF	10
#define BS	8
#define TB	9
#define FF	12

/*      Define symbol table parameters          */
#define lvalsize 3
#define SWITCH_MAX 254
#define symsiz  15
#define symtbsz 6000
#define numglbs 300
#define startglb symtab
#define endglb  startglb+numglbs*symsiz
#define startloc endglb+symsiz
#define endloc  symtab+symtbsz-symsiz

/*      Define symbol table entry format        */

#define name    0
#define ident   9
#define type    10
#define indcnt	11
#define storage 12
#define offset  13
#define offset1	14
/*      System wide name size (for symbols)     */

#define namesize 9
#define namemax  8

/*      Define possible entries for "ident"     */

#define variable	1		/* a normal varble */
#define array		2		/* array of varbles */
#define pointer		3		/* pointer to a varble */
#define function	4		/* entry is a function */
/*      Define possible entries for "type"      */

#define cchar   1
#define cint    2

/*	Lenght of possible entries for "type"	*/

#define lchar	1
#define lint	2
#define lpoint	2

/*      Define possible entries for "storage"   */

#define statik  1
#define stkloc  2
#define stkarg  3

/*	values returned by heirxx 		*/

#define	LOADED		0	/* value on top of stack */
#define ADDRESS		1	/* address of lvalue on stack */
#define NOTLOADED	2	/* address in lvalue in array not loaded */
#define CONSTANT	3	/* constant in lval */
/*      Define the "while" statement queue      */

#define wqtabsz 100
#define wqsiz   6
#define wqmax   wq+wqtabsz-wqsiz

/*      Define entry offsets in while queue     */

#define wqsym   0
#define wqsp    1
#define wqloop  2
#define wqlab   3
#define wqend	4
#define wqbody	5
/*      Define the literal pool                 */

#define litabsz 2000
#define litmax  litabsz-1

/*      Define the input line                   */

#define linesize 80
#define linemax linesize-1
#define mpmax   linemax

/*      Define the macro (define) pool          */

#define macqsize 1000
#define macmax  macqsize-1

/*      Define statement types (tokens)         */

#define stif    1
#define stwhile 2
#define stfor	3
#define stswitch 4
#define streturn 5
#define stbreak 6
#define stcont  7
#define stasm   8
#define stexp   9

/*	name of some function called by code gen step */

#define EQ	"@comp"		
#define	GE	"@comp+25h"	
#define GT	"@comp+12h"	
#define LE	"@comp+2fh"
#define LT	"@comp+1ch"
#define NE	"@comp+19h"

#define UGE	"@ucomp+13h"
#define UGT	"@ucomp"
#define	ULE	"@ucomp+1ch"
#define	ULT	"@ucomp+0ah"

#define PREINC	"@incdec"
#define PREDEC	"@incdec+08h"
#define POSTINC	"@incdec+10h"
#define POSTDEC	"@indec+1ah"

/*      Now reserve some storage words          */

char    symtab[symtbsz];        /* symbol table */
char    *glbptr,*locptr;                /* ptrs to next entries */
int     wq[wqtabsz];            /* while queue */
int     *wqptr;                 /* ptr to next entry */

char    litq[litabsz];          /* literal pool */
int     litptr;                 /* ptr to next entry */

char    macq[macqsize];         /* macro string buffer */
int     macptr;                 /* and its index */

char    line[linesize];         /* parsing buffer */
char    mline[linesize];        /* temp macro buffer */
int     lptr,mptr;              /* ptrs into each */

/*      Misc storage    */

int     nxtlab,         /* next avail label # */
        litlab,         /* label # assigned to literal pool */
        sp,             /* compiler relative stk ptr */
        argstk,         /* function arg sp */
        ncmp,           /* # open compound statements */
        errcnt,         /* # errors in compilation */
        eof,            /* set non-zero on final input eof */
        input,          /* iob # for input file */
        output,         /* iob # for output file (if any) */
        input2,         /* iob # for "include" title */
	line1,		/* current line number in main file */
	line2,		/* current line in include file */
        ctext,          /* non-zero to intermix c-source */
        cmode,          /* non-zero while parsing c-code */
                        /* zero when passing assembly code */
	cif,		/* state of preprocess if statement */
        lastst;         /* last executed statment type */

char    *cptr;          /* work ptr to any char buffer */
int     *iptr;          /* work ptr to any int buffer */
/*	file io buffers		*/
char finp[BUFSIZ];		/* input file buffer */
char finp2[BUFSIZ];		/* input 2 file buffer */
char fout[BUFSIZ];		/* ouput file buffer */
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