/[cvs]/stack/stack.c
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revision 1.117 by teddy, Wed Mar 20 05:29:29 2002 UTC revision 1.123 by masse, Wed Mar 27 19:53:01 2002 UTC
# Line 123  value* new_val(environment *env) Line 123  value* new_val(environment *env)
123    value *nval= malloc(sizeof(value));    value *nval= malloc(sizeof(value));
124    stackitem *nitem= malloc(sizeof(stackitem));    stackitem *nitem= malloc(sizeof(stackitem));
125    
126      assert(nval != NULL);
127      assert(nitem != NULL);
128    
129    nval->content.ptr= NULL;    nval->content.ptr= NULL;
130    nval->type= empty;    nval->type= empty;
131    
# Line 335  void push_cstring(environment *env, cons Line 338  void push_cstring(environment *env, cons
338    int length= strlen(in_string)+1;    int length= strlen(in_string)+1;
339    
340    new_value->content.ptr= malloc(length);    new_value->content.ptr= malloc(length);
341      assert(new_value != NULL);
342    env->gc_count += length;    env->gc_count += length;
343    strcpy(new_value->content.ptr, in_string);    strcpy(new_value->content.ptr, in_string);
344    new_value->type= string;    new_value->type= string;
# Line 349  char *mangle_str(const char *old_string) Line 353  char *mangle_str(const char *old_string)
353    char *new_string, *current;    char *new_string, *current;
354    
355    new_string= malloc((strlen(old_string)*2)+4);    new_string= malloc((strlen(old_string)*2)+4);
356      assert(new_string != NULL);
357    strcpy(new_string, "sx_");    /* Stack eXternal */    strcpy(new_string, "sx_");    /* Stack eXternal */
358    current= new_string+3;    current= new_string+3;
359    while(old_string[0] != '\0'){    while(old_string[0] != '\0'){
# Line 418  void push_sym(environment *env, const ch Line 423  void push_sym(environment *env, const ch
423    
424      /* Create a new symbol */      /* Create a new symbol */
425      (*new_symbol)= malloc(sizeof(symbol));      (*new_symbol)= malloc(sizeof(symbol));
426        assert((*new_symbol) != NULL);
427      (*new_symbol)->val= NULL;   /* undefined value */      (*new_symbol)->val= NULL;   /* undefined value */
428      (*new_symbol)->next= NULL;      (*new_symbol)->next= NULL;
429      (*new_symbol)->id= malloc(strlen(in_string)+1);      (*new_symbol)->id= malloc(strlen(in_string)+1);
430        assert((*new_symbol)->id != NULL);
431      strcpy((*new_symbol)->id, in_string);      strcpy((*new_symbol)->id, in_string);
432    
433      /* Intern the new symbol in the hash table */      /* Intern the new symbol in the hash table */
# Line 530  void print_val(value *val, int noquote, Line 537  void print_val(value *val, int noquote,
537      tstack= stack;      tstack= stack;
538      do {      do {
539        titem=malloc(sizeof(stackitem));        titem=malloc(sizeof(stackitem));
540          assert(titem != NULL);
541        titem->item=val;        titem->item=val;
542        titem->next=tstack;        titem->next=tstack;
543        tstack=titem;             /* Put it on the stack */        tstack=titem;             /* Put it on the stack */
# Line 1161  extern void sx_2b(environment *env) Line 1169  extern void sx_2b(environment *env)
1169      toss(env); if(env->err) return;      toss(env); if(env->err) return;
1170      len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1;      len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1;
1171      new_string= malloc(len);      new_string= malloc(len);
1172        assert(new_string != NULL);
1173      strcpy(new_string, b_val->content.ptr);      strcpy(new_string, b_val->content.ptr);
1174      strcat(new_string, a_val->content.ptr);      strcat(new_string, a_val->content.ptr);
1175      push_cstring(env, new_string);      push_cstring(env, new_string);
# Line 1642  extern void foreach(environment *env) Line 1651  extern void foreach(environment *env)
1651    
1652    iterator= foo;    iterator= foo;
1653    
1654    while(iterator!=NULL) {    while(iterator->type!=empty) {
1655      push_val(env, CAR(iterator));      push_val(env, CAR(iterator));
1656      push_val(env, loop);      push_val(env, loop);
1657      eval(env); if(env->err) return;      eval(env); if(env->err) return;
# Line 1661  extern void foreach(environment *env) Line 1670  extern void foreach(environment *env)
1670  extern void to(environment *env)  extern void to(environment *env)
1671  {  {
1672    int ending, start, i;    int ending, start, i;
1673    value *iterator, *temp;    value *iterator, *temp, *end;
1674    
1675      end= new_val(env);
1676    
1677    if(env->head->type==empty || CDR(env->head)->type==empty) {    if(env->head->type==empty || CDR(env->head)->type==empty) {
1678      printerr("Too Few Arguments");      printerr("Too Few Arguments");
# Line 1696  extern void to(environment *env) Line 1707  extern void to(environment *env)
1707    if(iterator->type==empty    if(iterator->type==empty
1708       || (CAR(iterator)->type==symb       || (CAR(iterator)->type==symb
1709           && CAR(iterator)->content.sym->id[0]=='[')) {           && CAR(iterator)->content.sym->id[0]=='[')) {
1710      temp= NULL;      temp= end;
1711      toss(env);      toss(env);
1712    } else {    } else {
1713      /* Search for first delimiter */      /* Search for first delimiter */
1714      while(CDR(iterator)!=NULL      while(CDR(iterator)->type!=empty
1715            && (CAR(CDR(iterator))->type!=symb            && (CAR(CDR(iterator))->type!=symb
1716                || CAR(CDR(iterator))->content.sym->id[0]!='['))                || CAR(CDR(iterator))->content.sym->id[0]!='['))
1717        iterator= CDR(iterator);        iterator= CDR(iterator);
# Line 1708  extern void to(environment *env) Line 1719  extern void to(environment *env)
1719      /* Extract list */      /* Extract list */
1720      temp= env->head;      temp= env->head;
1721      env->head= CDR(iterator);      env->head= CDR(iterator);
1722      CDR(iterator)= NULL;      CDR(iterator)= end;
1723    
1724      if(env->head!=NULL)      if(env->head->type!=empty)
1725        toss(env);        toss(env);
1726    }    }
1727    
# Line 1760  extern void sx_72656164(environment *env Line 1771  extern void sx_72656164(environment *env
1771      }      }
1772            
1773      env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1);      env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1);
1774        assert(env->in_string != NULL);
1775      env->free_string= env->in_string; /* Save the original pointer */      env->free_string= env->in_string; /* Save the original pointer */
1776      strcpy(env->in_string, CAR(env->head)->content.ptr);      strcpy(env->in_string, CAR(env->head)->content.ptr);
1777      toss(env); if(env->err) return;      toss(env); if(env->err) return;
# Line 1767  extern void sx_72656164(environment *env Line 1779  extern void sx_72656164(environment *env
1779        
1780    inlength= strlen(env->in_string)+1;    inlength= strlen(env->in_string)+1;
1781    match= malloc(inlength);    match= malloc(inlength);
1782      assert(match != NULL);
1783    
1784    if(sscanf(env->in_string, blankform, &readlength) != EOF    if(sscanf(env->in_string, blankform, &readlength) != EOF
1785       && readlength != -1) {       && readlength != -1) {
# Line 2435  extern void cons(environment *env) Line 2448  extern void cons(environment *env)
2448    swap(env); if(env->err) return;    swap(env); if(env->err) return;
2449    toss(env); if(env->err) return;    toss(env); if(env->err) return;
2450  }  }
2451    
2452    /*  2: 3                        =>                */
2453    /*  1: [ [ 1 . 2 ] [ 3 . 4 ] ]  =>  1: [ 3 . 4 ]  */
2454    extern void assq(environment *env)
2455    {
2456      assocgen(env, eq);
2457    }
2458    
2459    
2460    /* General assoc function */
2461    void assocgen(environment *env, funcp eqfunc)
2462    {
2463      value *key, *item;
2464    
2465      /* Needs two values on the stack, the top one must be an association
2466         list */
2467      if(env->head->type==empty || CDR(env->head)->type==empty) {
2468        printerr("Too Few Arguments");
2469        env->err= 1;
2470        return;
2471      }
2472    
2473      if(CAR(env->head)->type!=tcons) {
2474        printerr("Bad Argument Type");
2475        env->err= 2;
2476        return;
2477      }
2478    
2479      key=CAR(CDR(env->head));
2480      item=CAR(env->head);
2481    
2482      while(item->type == tcons){
2483        if(CAR(item)->type != tcons){
2484          printerr("Bad Argument Type");
2485          env->err= 2;
2486          return;
2487        }
2488        push_val(env, key);
2489        push_val(env, CAR(CAR(item)));
2490        eqfunc(env); if(env->err) return;
2491    
2492        /* Check the result of 'eqfunc' */
2493        if(env->head->type==empty) {
2494          printerr("Too Few Arguments");
2495          env->err= 1;
2496        return;
2497        }
2498        if(CAR(env->head)->type!=integer) {
2499          printerr("Bad Argument Type");
2500          env->err= 2;
2501          return;
2502        }
2503    
2504        if(CAR(env->head)->content.i){
2505          toss(env); if(env->err) return;
2506          break;
2507        }
2508        toss(env); if(env->err) return;
2509    
2510        if(item->type!=tcons) {
2511          printerr("Bad Argument Type");
2512          env->err= 2;
2513          return;
2514        }
2515    
2516        item=CDR(item);
2517      }
2518    
2519      if(item->type == tcons){      /* A match was found */
2520        push_val(env, CAR(item));
2521      } else {
2522        push_int(env, 0);
2523      }
2524      swap(env); if(env->err) return;
2525      toss(env); if(env->err) return;
2526      swap(env); if(env->err) return;
2527      toss(env);
2528    }
2529    
2530    extern void sx_646f(environment *env)
2531    {
2532      swap(env); if(env->err) return;
2533      eval(env);
2534    }
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