Barking up the wrong tree here, remember compilation, not interpretation

reference/runtime.c

@@ -1,135 +0,0 @@
-#include "runtime.h"
-
-box_t cons(box_t car, box_t cdr) {
-  cons_t* kons = alloc();
-  kons->car = car;
-  kons->cdr = cdr;
-  box_t box;
-  box.type = CONS;
-  box.cons = kons;
-  return box;
-}
-
-void chomp_ws() {
-  char c = getchar();
-  for(;;) {
-    if (c == ' ' || c == '\t' || c == '\n' || c == '\r') {
-      c = getchar();
-    } else {
-      ungetchar(c);
-      break;
-    }
-  }
-}
-
-box_t read_integer() {
-  char buf[256];
-  size_t i = 0;
-  char next = getchar();
-  while(isdigit(next)) {
-    buf[i] = next;
-    next = getchar();
-    i++;
-  }
-  ungetchar(next);
-  buf[i] = 0;
-  box_t res;
-  res.type = INTEGER;
-  res.integer = atoi(buf);
-  chomp_ws();
-  return res;
-}
-
-box_t read_symbol() {
-  char buf[256];
-  size_t i = 0;
-  char next = getchar();
-  while (isalpha(next)) { // Totally insufficent but we'll look into it later
-    buf[i] = next;
-    next = getchar();
-    i++;
-  }
-  ungetchar(next);
-  buf[i] = 0;
-  box_t res;
-  char *str = strndup(buf, i);
-  res.type = SYMBOL;
-  res.symbol = str;
-  chomp_ws(); // Clean up whitespace afterwards
-  return res;
-}
-
-box_t read_list() {
-  char c = getchar();
-  box_t val;
-  if (c == ')') {
-    chomp_ws();
-    val.type = CONS;
-    val.cons = the_empty_list;
-    return val;
-  } else {
-    ungetchar(c);
-    box_t car = read();
-    box_t cdr = read_list();
-    return cons(car, cdr);
-  }
-}
-    
-box_t read() {
-  chomp_ws();
-  char next = getchar();
-  if (next == '(') {
-    chomp_ws();
-    return read_list();
-  } else if (isdigit(next)) {
-    ungetchar(next);
-    return read_integer();
-  } else if (isalpha(next) || ispunct(next)) {
-    ungetchar(next);
-    return read_symbol();
-  } else if (next == EOF) {
-    box_t bye;
-    bye.type = BYE;
-    return bye;
-  } else {
-    fprintf(stderr, "Bad input");
-    exit(1);
-  }
-}
-
-void scm_print_cons(box_t exp) {
-  printf("(");
-  while(exp.type = CONS && exp.cons != the_empty_list) {
-    scm_print(exp.cons->car);
-    if (exp.cons->cdr.cons != the_empty_list) {
-      printf(" ");
-    }
-    exp = exp.cons->cdr;
-  }
-  if (exp.cons == the_empty_list) {
-    printf(")");
-  } else {
-    printf(". ");
-    scm_print(exp);
-    printf(")");
-  }
-}
-
-void scm_print(box_t exp) {
-  switch (exp.type) {
-  case INTEGER:
-    printf("%d", exp.integer);
-    break;
-  case SYMBOL:
-    printf("%s", exp.symbol);
-    break;
-  case CONS:
-    scm_print_cons(exp);
-    break;
-  }
-}
-    
-
-box_t eval(box_t exp) {
-  return exp;
-}

reference/runtime.h

@@ -1,17 +0,0 @@
-#ifndef _RUNTIME_H_
-#define _RUNTIME_H_
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include "common.h"
-#include "gc.h"
-
-#define ungetchar(X) ungetc(X, stdin)
-
-box_t read();
-box_t eval(box_t);
-void scm_print(box_t);
-
-#endif // _RUNTIME_H_

reference/scheme.c

@@ -1,25 +0,0 @@
-
-#include "gc.h"
-#include "runtime.h"
-
-void prompt() {
-  printf("> ");
-}
-
-int repl() {
-  box_t res;
-  do {
-    prompt();
-    box_t in = read();
-    res = eval(in);
-    scm_print(res);
-    printf("\n");
-  } while (res.type != BYE);
-
-  return 0;
-}
-
-int main() {
-  gc_init();
-  return repl();
-}