/[cvs]/stack/stack.c
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revision 1.40 by teddy, Wed Feb 6 11:44:02 2002 UTC revision 1.44 by masse, Thu Feb 7 01:01:02 2002 UTC
# Line 428  extern void rcl(environment *env) Line 428  extern void rcl(environment *env)
428  extern void eval(environment *env)  extern void eval(environment *env)
429  {  {
430    funcp in_func;    funcp in_func;
431      value* temp_val;
432      stackitem* iterator;
433    
434    if(env->head==NULL) {    if(env->head==NULL) {
435      printerr("Too Few Arguments");      printerr("Too Few Arguments");
436      env->err=1;      env->err=1;
# Line 451  extern void eval(environment *env) Line 454  extern void eval(environment *env)
454      toss(env);      toss(env);
455      if(env->err) return;      if(env->err) return;
456      (*in_func)(env);      (*in_func)(env);
457        return;
458      }
459    
460      /* If it's a list */
461      if(env->head->item->type==list) {
462        temp_val= env->head->item;
463        env->head->item->refcount++;
464        toss(env);
465        if(env->err) return;
466        iterator= (stackitem*)temp_val->content.ptr;
467        while(iterator!=NULL && iterator->item!=NULL) {
468          push_val(&(env->head), iterator->item);
469          if(env->head->item->type==symb
470            && strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) {
471            toss(env);
472            if(env->err) return;
473            eval(env);
474          }
475          iterator= iterator->next;
476        }
477        free_val(temp_val);
478    }    }
479  }  }
480    
481  /* Reverse a list */  /* Reverse (flip) a list */
482  extern void rev(environment *env){  extern void rev(environment *env){
483    stackitem *old_head, *new_head, *item;    stackitem *old_head, *new_head, *item;
484    
# Line 537  void stack_read(environment *env, char * Line 561  void stack_read(environment *env, char *
561    rest= malloc(inlength);    rest= malloc(inlength);
562    
563    do {    do {
564        /* If comment */
565        if((convert= sscanf(in_line, "#%[^\n\r]", rest))) {
566          free(temp); free(rest);
567          return;
568        }
569    
570      /* If string */      /* If string */
571      if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) {      if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) {
572        push_cstring(&(env->head), temp);        push_cstring(&(env->head), temp);
# Line 615  extern void expand(environment *env) Line 645  extern void expand(environment *env)
645      return;      return;
646    }    }
647    
648      rev(env);
649    
650      if(env->err)
651        return;
652    
653    /* The first list element is the new stack head */    /* The first list element is the new stack head */
654    new_head= temp= env->head->item->content.ptr;    new_head= temp= env->head->item->content.ptr;
655    
# Line 797  int main() Line 832  int main()
832      }      }
833      printf("okidok\n ");      printf("okidok\n ");
834    }    }
835      quit(&myenv);
836    exit(EXIT_SUCCESS);    return EXIT_FAILURE;
837  }  }
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