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atldef.h
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atldef.h
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/*
A T L A S T
Autodesk Threaded Language Application System Toolkit
Definitions for components of ATLAST
Designed and implemented in January of 1990 by John Walker.
This file contains the definitions for modules within the ATLAST
language system itself. Definitions used by programs that link to
ATLAST are in ATLAST.H, which is included by this file
automatically.
This program is in the public domain.
*/
#include "atlast.h" /* Define user linkage structures */
typedef void (*codeptr)(); /* Machine code pointer */
/* Dictionary word entry */
typedef struct dw {
struct dw *wnext; /* Next word in dictionary */
char *wname; /* Word name. The first character is
actually the word flags, including
the (IMMEDIATE) bit. */
codeptr wcode; /* Machine code implementation */
} dictword;
/* Word flag bits */
#define IMMEDIATE 1 /* Word is immediate */
#define WORDUSED 2 /* Word used by program */
#define WORDHIDDEN 4 /* Word is hidden from lookup */
/* Data types */
typedef atl_int stackitem;
typedef dictword **rstackitem;
/* Stack items occupied by a dictionary word definition */
#define Dictwordl ((sizeof(dictword)+(sizeof(stackitem)-1))/sizeof(stackitem))
/* Token types */
#define TokNull 0 /* Nothing scanned */
#define TokWord 1 /* Word stored in token name buffer */
#define TokInt 2 /* Integer scanned */
#define TokReal 3 /* Real number scanned */
#define TokString 4 /* String scanned */
/* Primitive definition table entry */
struct primfcn {
char *pname;
codeptr pcode;
};
/* Internal state marker item */
typedef struct {
stackitem *mstack; /* Stack position marker */
stackitem *mheap; /* Heap allocation marker */
dictword ***mrstack; /* Return stack position marker */
dictword *mdict; /* Dictionary marker */
} atl_statemark;
#ifdef EXPORT
#define Exported
#ifndef NOMANGLE
#define stk atl__sp
#define stack atl__sk
#define stackbot atl__sb
#define stacktop atl__st
#define rstk atl__rp
#define rstack atl__rk
#define rstackbot atl__rb
#define rstacktop atl__rt
#define heap atl__hb
#define hptr atl__hp
#define heapbot atl__hs
#define heaptop atl__ht
#define dict atl__dh
#define dictprot atl__dp
#define strbuf atl__ts
#define cstrbuf atl__tn
#define ip atl__ip
#define curword atl__cw
#define createword atl__wd
#endif /* NOMANGLE */
#ifdef MEMSTAT
#ifndef NOMANGLE
#define stackmax atl__sx
#define rstackmax atl__rx
#define heapmax atl__hx
#endif /* NOMANGLE */
extern stackitem *stackmax, *heapmax;
extern dictword ***rstackmax;
#endif
#ifdef ALIGNMENT
#ifndef NOMANGLE
#define rbuf0 atl__r0
#define rbuf1 atl__r1
#define rbuf2 atl__r2
#endif /* NOMANGLE */
extern atl_real rbuf0, rbuf1, rbuf2; /* Real temporaries for alignment */
#endif
#define FmodeR 1 /* Read mode */
#define FmodeW 2 /* Write mode */
#define FmodeB 4 /* Binary file mode */
#define FmodeCre 8 /* Create new file */
extern stackitem *stack, *stk, *stackbot, *stacktop, *heap, *hptr,
*heapbot, *heaptop;
extern dictword ***rstack, ***rstk, ***rstackbot, ***rstacktop;
extern dictword *dict, *dictprot, *curword, *createword;
extern dictword **ip;
extern char **strbuf;
extern int cstrbuf;
#ifndef NOMANGLE
#define P_create atl__Pcr
#define P_dodoes atl__Pds
#endif /* NOMANGLE */
extern void P_create(), P_dodoes();
#else /* EXPORT */
#define Exported static
#endif /* EXPORT */
#ifndef NOMEMCHECK
#ifdef EXPORT
#ifndef NOMANGLE
#define stakover atl__Eso
#define rstakover atl__Erso
#define heapover atl__Eho
#define badpointer atl__Ebp
#define stakunder atl__Esu
#define rstakunder atl__Ersu
#endif /* NOMANGLE */
extern
#endif
void stakover(), rstakover(), heapover(), badpointer(),
stakunder(), rstakunder();
#endif
/* Functions called by exported extensions. */
extern void atl_primdef(), atl_error();
extern dictword *atl_lookup(), *atl_vardef();
extern stackitem *atl_body();
extern int atl_exec();
#ifdef EXPORT
extern char *atl_fgetsp();
#endif
#ifdef MSDOS
#define FBmode /* DOS requires binary file flag */
#endif
#ifdef Macintosh
#define FBmode /* Macintosh requires binary file flag */
#endif
/* STATIC is defined as "static" on platforms which require this
specification on declarations for forward-referenced functions. */
#define STATIC static
#ifdef ADS /* Definitions if we're an ADS app */
#define printf ads_printf /* Print through ADS */
#define Keybreak() {static int n=0; if ((n=(n+1)&127)==0) {UbI(); broken=ads_usrbrk();}}
#endif
/* Dynamic storage manipulation primitives */
/* Stack access definitions */
#define S0 stk[-1] /* Top of stack */
#define S1 stk[-2] /* Next on stack */
#define S2 stk[-3] /* Third on stack */
#define S3 stk[-4] /* Fourth on stack */
#define S4 stk[-5] /* Fifth on stack */
#define S5 stk[-6] /* Sixth on stack */
#define Pop stk-- /* Pop the top item off the stack */
#define Pop2 stk -= 2 /* Pop two items off the stack */
#define Npop(n) stk -= (n) /* Pop N items off the stack */
#define Push *stk++ /* Push item onto stack */
#ifdef MEMSTAT
#define Mss(n) if ((stk+(n))>stackmax) stackmax = stk+(n);
#define Msr(n) if ((rstk+(n))>rstackmax) rstackmax = rstk+(n);
#define Msh(n) if ((hptr+(n))>heapmax) heapmax = hptr+(n);
#else
#define Mss(n)
#define Msr(n)
#define Msh(n)
#endif
#ifdef NOMEMCHECK
#define Sl(x)
#define So(n)
#else
#define Memerrs
#define Sl(x) if ((stk-stack)<(x)) {stakunder(); return Memerrs;}
#define So(n) Mss(n) if ((stk+(n))>stacktop) {stakover(); return Memerrs;}
#endif
/* Return stack access definitions */
#define R0 rstk[-1] /* Top of return stack */
#define R1 rstk[-2] /* Next on return stack */
#define R2 rstk[-3] /* Third on return stack */
#define Rpop rstk-- /* Pop return stack */
#define Rpush *rstk++ /* Push return stack */
#ifdef NOMEMCHECK
#define Rsl(x)
#define Rso(n)
#else
#define Rsl(x) if ((rstk-rstack)<(x)) {rstakunder(); return Memerrs;}
#define Rso(n) Msr(n) if ((rstk+(n))>rstacktop){rstakover(); return Memerrs;}
#endif
/* Heap access definitions */
#ifdef NOMEMCHECK
#define Ho(n)
#define Hpc(n)
#else
#define Ho(n) Msh(n) if ((hptr+(n))>heaptop){heapover(); return Memerrs;}
#define Hpc(n) if ((((stackitem *)(n))<heapbot)||(((stackitem *)(n))>=heaptop)){badpointer(); return Memerrs;}
#endif
#define Hstore *hptr++ /* Store item on heap */
#define state (*heap) /* Execution state is first heap word */
#define prim static void /* Attributes of primitive functions */
/* Real number definitions (used only if REAL is configured). */
#define Realsize (sizeof(atl_real)/sizeof(stackitem)) /* Stack cells / real */
#define Realpop stk -= Realsize /* Pop real from stack */
#define Realpop2 stk -= (2 * Realsize) /* Pop two reals from stack */
#ifdef ALIGNMENT
#define REAL0 *((atl_real *) memcpy((char *) &rbuf0, (char *) &S0, sizeof(atl_real)))
#define REAL1 *((atl_real *) memcpy((char *) &rbuf1, (char *) &S1, sizeof(atl_real)))
#define REAL2 *((atl_real *) memcpy((char *) &rbuf2, (char *) &S2, sizeof(atl_real)))
#define SREAL0(x) rbuf2=(x); (void)memcpy((char *) &S0, (char *) &rbuf2, sizeof(atl_real))
#define SREAL1(x) rbuf2=(x); (void)memcpy((char *) &S1, (char *) &rbuf2, sizeof(atl_real))
#else
#define REAL0 *((atl_real *) &S0) /* First real on stack */
#define REAL1 *((atl_real *) &S1) /* Second real on stack */
#define REAL2 *((atl_real *) &S2) /* Third real on stack */
#define SREAL0(x) *((atl_real *) &S0) = (x)
#define SREAL1(x) *((atl_real *) &S1) = (x)
#endif
/* File I/O definitions (used only if FILEIO is configured). */
#define FileSent 0x831FDF9DL /* Courtesy Marinchip Radioactive
random number generator */
#define Isfile(x) Hpc(x); if (*((stackitem *)(x))!=FileSent) {V printf("\nNot a file\n");return;}
#define FileD(x) ((FILE *) *(((stackitem *) (x)) + 1))
#define Isopen(x) if (FileD(x) == NULL) {V printf("\nFile not open\n");return;}