/[cvs]/stack/stack.c
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Diff of /stack/stack.c

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revision 1.5 by teddy, Tue Jan 8 00:03:16 2002 UTC revision 1.7 by masse, Tue Jan 8 13:46:05 2002 UTC
# Line 11  Line 11 
11    
12  typedef struct stack_item  typedef struct stack_item
13  {  {
14    enum {value, string, ref, func, symbol} type;    enum {value, string, ref, func, symbol, list} type;
15    union {    union {
16      void* ptr;      void* ptr;
17      int val;      int val;
# Line 121  void def_sym(hashtbl in_hashtbl, const c Line 121  void def_sym(hashtbl in_hashtbl, const c
121    
122  int push_ref(stackitem** stack_head, hashtbl in_hash, const char* in_string)  int push_ref(stackitem** stack_head, hashtbl in_hash, const char* in_string)
123  {  {
124    void* handle;    static void* handle= NULL;
125    void* symbol;    void* symbol;
126      
127    stackitem* new_item= malloc(sizeof(stackitem));    stackitem* new_item= malloc(sizeof(stackitem));
128    new_item->content.ptr= *hash(in_hash, in_string);    new_item->content.ptr= *hash(in_hash, in_string);
129    new_item->type= ref;    new_item->type= ref;
130    
131    if(new_item->content.ptr==NULL) {    if(handle==NULL)
132      handle= dlopen(NULL, RTLD_LAZY);      handle= dlopen(NULL, RTLD_LAZY);
133    
134      if(new_item->content.ptr==NULL) {
135      symbol= dlsym(handle, in_string);      symbol= dlsym(handle, in_string);
136      if(dlerror()==NULL)      if(dlerror()==NULL)
137        def_func(in_hash, symbol, in_string);        def_func(in_hash, symbol, in_string);
# Line 148  extern void toss(stackitem** stack_head) Line 150  extern void toss(stackitem** stack_head)
150  {  {
151    stackitem* temp= *stack_head;    stackitem* temp= *stack_head;
152    
153      if((*stack_head)==NULL)
154        return;
155      
156      if((*stack_head)->type==string)
157        free((*stack_head)->content.ptr);
158    
159    *stack_head= (*stack_head)->next;    *stack_head= (*stack_head)->next;
160    free(temp);    free(temp);
161  }  }
# Line 167  void print_st(stackitem* stack_head, lon Line 175  void print_st(stackitem* stack_head, lon
175      printf("%ld: \"%s\"\n", counter, (char*)stack_head->content.ptr);      printf("%ld: \"%s\"\n", counter, (char*)stack_head->content.ptr);
176      break;      break;
177    case ref:    case ref:
178        printf("%ld: %s\n", counter, ((stackitem*)stack_head->content.ptr)->id);
179        break;
180    case func:    case func:
181    case symbol:    case symbol:
182      default:
183      printf("%ld: %p\n", counter, stack_head->content.ptr);      printf("%ld: %p\n", counter, stack_head->content.ptr);
184      break;      break;
185    }    }
# Line 243  extern void print(stackitem** stack_head Line 254  extern void print(stackitem** stack_head
254    case string:    case string:
255      printf("%s", (char*)(*stack_head)->content.ptr);      printf("%s", (char*)(*stack_head)->content.ptr);
256      break;      break;
   case symbol:  
     printf("%s", (*stack_head)->id);  
257    case ref:    case ref:
258        printf("%s", ((stackitem*)(*stack_head)->content.ptr)->id);
259        break;
260      case symbol:
261    default:    default:
262      printf("%p", (*stack_head)->content.ptr);      printf("%p", (*stack_head)->content.ptr);
263      break;      break;
# Line 254  extern void print(stackitem** stack_head Line 266  extern void print(stackitem** stack_head
266    toss(stack_head);    toss(stack_head);
267  }  }
268    
269    extern void pack(stackitem** stack_head)
270    {
271      void* delimiter;
272      stackitem *iterator, *temp, *pack;
273    
274      if((*stack_head)==NULL)
275        return;
276    
277      delimiter= (*stack_head)->content.ptr;
278      toss(stack_head);
279    
280      iterator= *stack_head;
281    
282      while(iterator->next!=NULL && iterator->next->content.ptr!=delimiter)
283        iterator= iterator->next;
284    
285      temp= *stack_head;
286      *stack_head= iterator->next;
287      iterator->next= NULL;
288      
289      if(*stack_head!=NULL && (*stack_head)->content.ptr==delimiter)
290        toss(stack_head);
291    
292      pack= malloc(sizeof(stackitem));
293      pack->type= list;
294      pack->content.ptr= temp;
295    
296      push(stack_head, pack);
297    }
298      
299    
300  extern void nl()  extern void nl()
301  {  {
302    printf("\n");    printf("\n");
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