5 files changed, 0 insertions, 401 deletions
diff --git a/works/life/compile-principle-experiment/4/lex.l b/works/life/compile-principle-experiment/4/lex.l
deleted file mode 100644
index e7731ca..0000000
--- a/works/life/compile-principle-experiment/4/lex.l
+++ /dev/null
@@ -1,20 +0,0 @@
-%{
-#include "main.h"
-#include "syn.h"
-%}
-%option noyywrap
-%%
-[ \t]	{ ; }	/* skip blanks and tabs */
-[0-9]+\.?|[0-9]*\.[0-9]+ {
-	Symbol *s = cru_symbol_install("", UNDEF, (SymbolValue)0.0);
-	sscanf(yytext, "%lf", &s->value.val);
-	yylval.sym = s;
-	return NUMBER; }
-[a-zA-Z][a-zA-Z0-9]* {
-	Symbol *s;
-	if ((s=cru_symbol_lookup(yytext)) == 0)
-		s = cru_symbol_install(yytext, UNDEF, (SymbolValue)0.0);
-	yylval.sym = s;
-	return s->type == UNDEF ? VAR : s->type; }
-\n	{ lineno++; return '\n'; }   /* everything else */
-.	{ return yytext[0]; }
diff --git a/works/life/compile-principle-experiment/4/main.c b/works/life/compile-principle-experiment/4/main.c
deleted file mode 100644
index 258ccc7..0000000
--- a/works/life/compile-principle-experiment/4/main.c
+++ /dev/null
@@ -1,279 +0,0 @@
-#include "main.h"
-
-#include "syn.h"
-
-#include <errno.h>
-#include <math.h>
-#include <setjmp.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-static Symbol *symlist = 0; /* symbol table: linked list */
-
-void *emalloc(size_t n) /* check return from malloc */
-{
-  void *p = malloc(n);
-  if (p == 0)
-    execerror("out of memory", (char *)0);
-  return p;
-}
-
-Symbol *cru_symbol_lookup(const char *name) {
-  for (Symbol *sp = symlist; sp != NULL; sp = sp->next)
-    if (strcmp(sp->name, name) == 0)
-      return sp;
-  return NULL;
-}
-
-Symbol *cru_symbol_install(const char *name, int type, SymbolValue value) {
-  Symbol *sp = (Symbol *)emalloc(sizeof(Symbol));
-  sp->name = emalloc(strlen(name) + 1);
-  strcpy(sp->name, name);
-  sp->type = type;
-  sp->value = value;
-  sp->next = symlist;
-  symlist = sp;
-  return sp;
-}
-
-jmp_buf begin;
-int lineno;
-
-void warning(const char *s, const char *t) {
-  fprintf(stderr, "%s", s);
-  if (t)
-    fprintf(stderr, " %s", t);
-  fprintf(stderr, " near line %d\n", lineno);
-}
-
-void yyerror(const char *s) { warning(s, NULL); }
-
-void execerror(const char *s, const char *t) {
-  warning(s, t);
-  longjmp(begin, 0);
-}
-
-double errcheck(double result, const char *name) {
-  if (errno == EDOM) {
-    errno = 0;
-    execerror(name, "argument out of domain");
-  } else if (errno == ERANGE) {
-    errno = 0;
-    execerror(name, "result out of range");
-  }
-  return result;
-}
-
-double Log(double x) { return errcheck(log(x), "log"); }
-double Log10(double x) { return errcheck(log10(x), "log10"); }
-double Sqrt(double x) { return errcheck(sqrt(x), "sqrt"); }
-double Exp(double x) { return errcheck(exp(x), "exp"); }
-double Pow(double x, double y) { return errcheck(pow(x, y), "exponentiation"); }
-double integer(double x) { return (double)(long)x; }
-
-static struct { /* Constants */
-  char *name;
-  double cval;
-} consts[] = {
-    {"PI", 3.14159265358979323846},    {"E", 2.71828182845904523536},
-    {"GAMMA", 0.57721566490153286060}, {"DEG", 57.29577951308232087680},
-    {"PHI", 1.61803398874989484820},
-};
-
-static struct { /* Built-ins */
-  char *name;
-  double (*func)();
-} builtins[] = {
-    {"sin", sin},   {"cos", cos},     {"atan", atan},
-    {"log", Log},   {"log10", Log10}, {"exp", Exp},
-    {"sqrt", Sqrt}, {"int", integer}, {"abs", fabs},
-};
-
-int initcode();
-int execute(Inst *p);
-
-void init() {
-  initcode();
-  for (int i = 0; i < sizeof(consts) / sizeof(*consts); i++)
-    cru_symbol_install(consts[i].name, VAR, (SymbolValue)consts[i].cval);
-  for (int i = 0; i < sizeof(builtins) / sizeof(*builtins); i++) {
-    cru_symbol_install(builtins[i].name, BLTIN, (SymbolValue)builtins->func);
-  }
-}
-
-int main(int argc, char **argv) {
-  init();
-  (void)setjmp(begin);
-  yyparse();
-  execute(prog);
-
-  return 0;
-}
-
-#define NSTACK 256
-static Datum stack[NSTACK]; /* the stack */
-static Datum *stackp;       /* next free spot on stack */
-
-#define NPROG 2000
-Inst prog[NPROG]; /* the machine */
-Inst *progp;      /* next free spot for code generation */
-Inst *pc;         /* program counter during execution */
-
-int initcode() /* initialize for code generation */
-{
-  stackp = stack;
-  progp = prog;
-  return 0;
-}
-
-int push(Datum d) /* push d onto stack */
-{
-  if (stackp >= &stack[NSTACK])
-    execerror("stack overflow", (char *)0);
-  *stackp++ = d;
-  return 0;
-}
-
-Datum pop() /* pop and return top elem from stack */
-{
-  if (stackp <= stack)
-    execerror("stack underflow", (char *)0);
-  return *--stackp;
-}
-
-int constpush() /* push constant onto stack */
-{
-  Datum d;
-  d.val = ((Symbol *)*pc++)->value.val;
-  push(d);
-  return 0;
-}
-
-int varpush() /* push variable onto stack */
-{
-  Datum d;
-  d.sym = (Symbol *)(*pc++);
-  push(d);
-  return 0;
-}
-
-int bltin() /* evaluate built-in on top of stack */
-{
-  Datum d;
-  d = pop();
-  d.val = (*(double (*)())(*pc++))(d.val);
-  push(d);
-  return 0;
-}
-
-int eval() /* evaluate variable on stack */
-{
-  Datum d;
-  d = pop();
-  if (d.sym->type == UNDEF)
-    execerror("undefined variable", d.sym->name);
-  d.val = d.sym->value.val;
-  push(d);
-  return 0;
-}
-
-int add() /* add top two elems on stack */
-{
-  Datum d1, d2;
-  d2 = pop();
-  d1 = pop();
-  d1.val += d2.val;
-  push(d1);
-  return 0;
-}
-
-int sub() /* subtract top of stack from next */
-{
-  Datum d1, d2;
-  d2 = pop();
-  d1 = pop();
-  d1.val -= d2.val;
-  push(d1);
-  return 0;
-}
-
-int mul() {
-  Datum d1, d2;
-  d2 = pop();
-  d1 = pop();
-  d1.val *= d2.val;
-  push(d1);
-  return 0;
-}
-
-int mydiv() {
-  Datum d1, d2;
-  d2 = pop();
-  if (d2.val == 0.0)
-    execerror("division by zero", (char *)0);
-  d1 = pop();
-  d1.val /= d2.val;
-  push(d1);
-  return 0;
-}
-
-int negate() {
-  Datum d;
-  d = pop();
-  d.val = -d.val;
-  push(d);
-  return 0;
-}
-
-int power() {
-  Datum d1, d2;
-  extern double Pow();
-  d2 = pop();
-  d1 = pop();
-  d1.val = Pow(d1.val, d2.val);
-  push(d1);
-  return 0;
-}
-
-int assign() /* assign top value to next value */
-{
-  Datum d1, d2;
-  d1 = pop();
-  d2 = pop();
-  if (d1.sym->type != VAR && d1.sym->type != UNDEF)
-    execerror("assignment to non-variable", d1.sym->name);
-  d1.sym->value.val = d2.val;
-  d1.sym->type = VAR;
-  push(d2);
-  return 0;
-}
-
-int print() /* pop top value from stack, print it */
-{
-  Datum d;
-  d = pop();
-  printf("\t%.8g\n", d.val);
-  return 0;
-}
-
-Inst *code(Inst f) /* install one instruction or operand */
-{
-  Inst *oprogp = progp;
-  if (progp >= &prog[NPROG])
-    execerror("program too big", (char *)0);
-  *progp++ = f;
-  return oprogp;
-}
-
-int execute(Inst *p) /* run the machine */
-{
-  for (pc = p; *pc != STOP;)
-    (*(*pc++))();
-  return 0;
-}
-
-int mypop() {
-  pop();
-  return 0;
-}
diff --git a/works/life/compile-principle-experiment/4/main.h b/works/life/compile-principle-experiment/4/main.h
deleted file mode 100644
index 96bd9e7..0000000
--- a/works/life/compile-principle-experiment/4/main.h
+++ /dev/null
@@ -1,41 +0,0 @@
-#pragma once
-
-typedef union SymbolValue {
-  double val;
-  double (*ptr)();
-} SymbolValue;
-
-typedef struct Symbol {
-  char *name;
-  int type;
-  SymbolValue value;
-  struct Symbol *next;
-} Symbol;
-
-Symbol *cru_symbol_lookup(const char *name);
-Symbol *cru_symbol_install(const char *name, int type, SymbolValue value);
-
-double Pow(double x, double y);
-
-int yylex();
-int yyparse();
-void yyerror(const char *s);
-
-extern int lineno;
-void execerror(const char *s, const char *t);
-
-typedef union Datum { /* interpreter stack type */
-  double val;
-  Symbol *sym;
-} Datum;
-extern Datum pop();
-int mypop();
-
-typedef int (*Inst)(); /* machine instruction */
-#define STOP (Inst)0
-
-extern Inst prog[];
-extern int eval(), add(), sub(), mul(), mydiv(), negate(), power();
-extern int assign(), bltin(), varpush(), constpush(), print();
-
-extern Inst *code(Inst f);
diff --git a/works/life/compile-principle-experiment/4/makefile b/works/life/compile-principle-experiment/4/makefile
deleted file mode 100644
index 756cdcb..0000000
--- a/works/life/compile-principle-experiment/4/makefile
+++ /dev/null
@@ -1,22 +0,0 @@
-main: main.o lex.o syn.o
-	cc -g lex.o syn.o main.o -o main
-
-main.o: main.c main.h syn.h
-	cc -g -c -o main.o main.c
-
-lex.c: lex.l
-	flex  -o lex.c lex.l
-
-lex.o: lex.c syn.h main.h
-	cc -g -c -o lex.o lex.c
-
-syn.c syn.h: syn.y
-	bison syn.y -d -o syn.c
-
-syn.o: syn.c syn.h main.h
-	cc -g -c -o syn.o syn.c
-
-PHONY: clean
-
-clean:
-	rm -f *.o lex.c syn.c syn.h main
diff --git a/works/life/compile-principle-experiment/4/syn.y b/works/life/compile-principle-experiment/4/syn.y
deleted file mode 100644
index ebe113f..0000000
--- a/works/life/compile-principle-experiment/4/syn.y
+++ /dev/null
@@ -1,39 +0,0 @@
-%{
-#include "main.h"
-#include <stdio.h>
-#define	code2(c1,c2)	code(c1); code(c2)
-#define	code3(c1,c2,c3)	code(c1); code(c2); code(c3)
-%}
-%union {
-	Symbol	*sym;	/* symbol table pointer */
-	double val;
-	Inst	*inst;	/* machine instruction */
-}
-%token	<sym>	NUMBER VAR BLTIN UNDEF
-%right	'='
-%left	'+' '-'
-%left	'*' '/'
-%left	UNARYMINUS
-%right	'^'	/* exponentiation */
-%%
-list:	  /* nothing */
-	| list '\n'
-	| list asgn '\n'  { code2(mypop, STOP); return 1; }
-	| list expr '\n'  { code2(print, STOP); return 1; }
-	| list error '\n' { yyerrok; }
-	;
-asgn:	  VAR '=' expr	{ code3(varpush,(Inst)$1,assign); }
-	;
-expr:	  NUMBER	{ code2(constpush, (Inst)$1); }
-	| VAR		{ code3(varpush, (Inst)$1, eval); }
-	| asgn
-	| BLTIN '(' expr ')' { code2(bltin, (Inst)$1->value.ptr); }
-	| '(' expr ')'
-	| expr '+' expr	{ code(add); }
-	| expr '-' expr	{ code(sub); }
-	| expr '*' expr	{ code(mul); }
-	| expr '/' expr	{ code(mydiv); }
-	| expr '^' expr	{ code(power); }
-	| '-' expr  %prec UNARYMINUS  { code(negate); }
-	;
-%%