bytecode vm start, can print constants currently

1 files changed, 0 insertions, 121 deletions

diff --git a/run.c b/run.c
deleted file mode 100644
index e4fa540..0000000
--- a/run.c
+++ /dev/null
@@ -1,121 +0,0 @@
-#include "run.h"
-#include "ast.h"
-#include "ht.h"
-
-#include <stdio.h>
-#include <string.h>
-
-// return pointer to nth subnode of AST_LIST node *l.
-// doesn't check that l is a list, or that it has at least n elems. 
-#define NTH(l,n) (&(l)->as.list.vals[(n)])
-
-// n is max index
-#define CK_LEN(s, l, n) do { if(l.len-1 != n) { \
-	printf("%s fn requires exactly %d args (%ld provided)",\
-	s, n, l.len-1); return 0; } } while(0);
-static int func_plus(Env *s, AstVec l) {
-	CK_LEN("+",l,2);
-	return eval(s, l.vals[1]) + eval(s, l.vals[2]);
-}
-static int func_id(Env *s, AstVec l) {
-	CK_LEN("id",l,1);
-	return eval(s, l.vals[1]);
-}
-static int func_minus(Env *s, AstVec l) {
-	CK_LEN("-",l,2);
-	return eval(s, l.vals[1]) - eval(s, l.vals[2]);
-}
-static int func_mult(Env *s, AstVec l) {
-	CK_LEN("*",l,2);
-	return eval(s, l.vals[1]) * eval(s, l.vals[2]);
-}
-static int func_div(Env *s, AstVec l) {
-	CK_LEN("/",l,2);
-	return eval(s, l.vals[1]) / eval(s, l.vals[2]);
-}
-static int func_print(Env *s, AstVec l) {
-	CK_LEN("print",l,1);
-	int v = eval(s, l.vals[1]);
-	printf("%d\n",v);
-	return v;
-}
-static int func_set(Env *s, AstVec l) {
-	CK_LEN("set", l, 2);
-	if (l.vals[1].ty != AST_SYMBOL) {
-		printf("can only assign to symbols");
-		return 0;
-	}
-	int v = eval(s, l.vals[2]);
-	printf("  %p set %s %d\n", (void*)s, l.vals[1].as.str, v);
-	ht_put(s, l.vals[1].as.str, v);
-	return v;
-}
-static int func_do(Env *s, AstVec l) {
-	for (int i = 1; i < l.len; i++) {
-		eval(s, l.vals[i]);
-	}
-	return 0;
-}
-
-typedef int (*builtin_func)(Env*, AstVec);
-typedef struct {
-	char *name;
-	builtin_func func;
-} BuiltinDesc;
-
-BuiltinDesc builtins[] = {
-	{ "+", func_plus },
-	{ "-", func_minus },
-	{ "*", func_mult },
-	{ "/", func_div },
-	{ "id", func_id },
-	{ "print", func_print },
-	{ "set", func_set },
-	{ "do", func_do },
-
-	{ NULL, NULL },
-};
-
-static int call_builtin(Env *s, char *name, AstVec arglist) {
-	for (BuiltinDesc *bd = builtins; bd->name != NULL; bd++) {
-		if (0 == strcmp(bd->name, name)) {
-			return bd->func(s, arglist);
-		}
-	}
-	printf("couldn't find builtin fn %s\n",name);
-	return 0;
-}
-
-int eval(Env *s, AstNode a) {
-	switch (a.ty) {
-	case AST_SYMBOL:;
-		int v;
-		if (ht_get(s, a.as.str, &v)) {
-			return v;
-		} else {
-			printf("unset variable %s\n",a.as.str);
-			return 0;
-		}
-		break;
-	case AST_NUM:
-		return a.as.num;
-		break;
-	case AST_LIST:;
-		AstVec l = a.as.list;
-		if (l.len < 1) {
-			printf("can't execute empty list\n");
-			return 0;
-		}
-		AstNode *first = &l.vals[0];
-		if (first->ty != AST_SYMBOL) {
-			printf("first element of list must be symbol\n");
-			return 0;
-		}
-		return call_builtin(s, first->as.str, l);
-		break;
-	default:
-		printf("???\n");
-		return 0;
-	}
-}
-