/[cvs]/stack/stack.c
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revision 1.71 by masse, Mon Feb 11 22:07:47 2002 UTC revision 1.74 by masse, Tue Feb 12 23:59:05 2002 UTC
# Line 9  Line 9 
9  /* strcmp, strcpy, strlen, strcat, strdup */  /* strcmp, strcpy, strlen, strcat, strdup */
10  #include <string.h>  #include <string.h>
11    
12  #define HASHTBLSIZE 65536  #define HASHTBLSIZE 2048
13    
14  /* First, define some types. */  /* First, define some types. */
15    
# Line 156  symbol **hash(hashtbl in_hashtbl, const Line 156  symbol **hash(hashtbl in_hashtbl, const
156  }  }
157    
158  /* Generic push function. */  /* Generic push function. */
159  void push(stackitem** stack_head, stackitem* in_item)  void push(environment *env, stackitem* in_item)
160  {  {
161    in_item->next= *stack_head;    in_item->next= env->head;
162    *stack_head= in_item;    env->head= in_item;
163  }  }
164    
165  /* Push a value onto the stack */  /* Push a value onto the stack */
166  void push_val(stackitem **stack_head, value *val)  void push_val(environment *env, value *val)
167  {  {
168    stackitem *new_item= malloc(sizeof(stackitem));    stackitem *new_item= malloc(sizeof(stackitem));
169    new_item->item= val;    new_item->item= val;
170    val->refcount++;    val->refcount++;
171    push(stack_head, new_item);    push(env, new_item);
172  }  }
173    
174  /* Push an integer onto the stack. */  /* Push an integer onto the stack. */
175  void push_int(stackitem **stack_head, int in_val)  void push_int(environment *env, int in_val)
176  {  {
177    value *new_value= malloc(sizeof(value));    value *new_value= malloc(sizeof(value));
178    stackitem *new_item= malloc(sizeof(stackitem));    stackitem *new_item= malloc(sizeof(stackitem));
# Line 182  void push_int(stackitem **stack_head, in Line 182  void push_int(stackitem **stack_head, in
182    new_value->type= integer;    new_value->type= integer;
183    new_value->refcount=1;    new_value->refcount=1;
184    
185    push(stack_head, new_item);    push(env, new_item);
186  }  }
187    
188  /* Copy a string onto the stack. */  /* Copy a string onto the stack. */
189  void push_cstring(stackitem **stack_head, const char *in_string)  void push_cstring(environment *env, const char *in_string)
190  {  {
191    value *new_value= malloc(sizeof(value));    value *new_value= malloc(sizeof(value));
192    stackitem *new_item= malloc(sizeof(stackitem));    stackitem *new_item= malloc(sizeof(stackitem));
# Line 197  void push_cstring(stackitem **stack_head Line 197  void push_cstring(stackitem **stack_head
197    new_value->type= string;    new_value->type= string;
198    new_value->refcount=1;    new_value->refcount=1;
199    
200    push(stack_head, new_item);    push(env, new_item);
201  }  }
202    
203  /* Mangle a symbol name to a valid C identifier name */  /* Mangle a symbol name to a valid C identifier name */
# Line 246  extern void mangle(environment *env){ Line 246  extern void mangle(environment *env){
246    new_value->type= string;    new_value->type= string;
247    new_value->refcount=1;    new_value->refcount=1;
248    
249    push_val(&(env->head), new_value);    push_val(env, new_value);
250  }  }
251    
252  /* Push a symbol onto the stack. */  /* Push a symbol onto the stack. */
# Line 313  void push_sym(environment *env, const ch Line 313  void push_sym(environment *env, const ch
313        new_fvalue->refcount= 1;        new_fvalue->refcount= 1;
314      }      }
315    }    }
316    push(&(env->head), new_item);    push(env, new_item);
317  }  }
318    
319  /* Print newline. */  /* Print newline. */
# Line 477  extern void rcl(environment *env) Line 477  extern void rcl(environment *env)
477    }    }
478    toss(env);            /* toss the symbol */    toss(env);            /* toss the symbol */
479    if(env->err) return;    if(env->err) return;
480    push_val(&(env->head), val); /* Return its bound value */    push_val(env, val); /* Return its bound value */
481  }  }
482    
483  /* If the top element is a symbol, determine if it's bound to a  /* If the top element is a symbol, determine if it's bound to a
# Line 522  extern void eval(environment *env) Line 522  extern void eval(environment *env)
522      if(env->err) return;      if(env->err) return;
523      iterator= (stackitem*)temp_val->content.ptr;      iterator= (stackitem*)temp_val->content.ptr;
524      while(iterator!=NULL) {      while(iterator!=NULL) {
525        push_val(&(env->head), iterator->item);        push_val(env, iterator->item);
526        if(env->head->item->type==symb        if(env->head->item->type==symb
527          && strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) {          && strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) {
528          toss(env);          toss(env);
# Line 574  extern void rev(environment *env){ Line 574  extern void rev(environment *env){
574  /* Make a list. */  /* Make a list. */
575  extern void pack(environment *env)  extern void pack(environment *env)
576  {  {
   void* delimiter;  
577    stackitem *iterator, *temp;    stackitem *iterator, *temp;
578    value *pack;    value *pack;
579    
   delimiter= env->head->item->content.ptr; /* Get delimiter */  
   toss(env);  
   
580    iterator= env->head;    iterator= env->head;
581    
582    if(iterator==NULL || iterator->item->content.ptr==delimiter) {    if(iterator==NULL
583         || (iterator->item->type==symb
584         && ((symbol*)(iterator->item->content.ptr))->id[0]=='[')) {
585      temp= NULL;      temp= NULL;
586      toss(env);      toss(env);
587    } else {    } else {
588      /* Search for first delimiter */      /* Search for first delimiter */
589      while(iterator->next!=NULL      while(iterator->next!=NULL
590            && iterator->next->item->content.ptr!=delimiter)            && (iterator->next->item->type!=symb
591              || ((symbol*)(iterator->next->item->content.ptr))->id[0]!='['))
592        iterator= iterator->next;        iterator= iterator->next;
593            
594      /* Extract list */      /* Extract list */
# Line 607  extern void pack(environment *env) Line 606  extern void pack(environment *env)
606    pack->content.ptr= temp;    pack->content.ptr= temp;
607    pack->refcount= 1;    pack->refcount= 1;
608    
609    temp= malloc(sizeof(stackitem));    push_val(env, pack);
   temp->item= pack;  
   
   push(&(env->head), temp);  
610    rev(env);    rev(env);
611  }  }
612    
# Line 670  extern void eq(environment *env) Line 666  extern void eq(environment *env)
666    result= (left==right);    result= (left==right);
667        
668    toss(env); toss(env);    toss(env); toss(env);
669    push_int(&(env->head), result);    push_int(env, result);
670  }  }
671    
672  /* Negates the top element on the stack. */  /* Negates the top element on the stack. */
# Line 692  extern void not(environment *env) Line 688  extern void not(environment *env)
688    
689    val= env->head->item->content.val;    val= env->head->item->content.val;
690    toss(env);    toss(env);
691    push_int(&(env->head), !val);    push_int(env, !val);
692  }  }
693    
694  /* Compares the two top elements on the stack and return 0 if they're the  /* Compares the two top elements on the stack and return 0 if they're the
# Line 798  extern void forget(environment *env) Line 794  extern void forget(environment *env)
794    
795  /* Returns the current error number to the stack */  /* Returns the current error number to the stack */
796  extern void errn(environment *env){  extern void errn(environment *env){
797    push_int(&(env->head), env->err);    push_int(env, env->err);
798  }  }
799    
800  extern void read(environment*);  extern void read(environment*);
# Line 853  extern void sx_2b(environment *env) { Line 849  extern void sx_2b(environment *env) {
849      strcpy(new_string, b_val->content.ptr);      strcpy(new_string, b_val->content.ptr);
850      strcat(new_string, a_val->content.ptr);      strcat(new_string, a_val->content.ptr);
851      free_val(a_val); free_val(b_val);      free_val(a_val); free_val(b_val);
852      push_cstring(&(env->head), new_string);      push_cstring(env, new_string);
853      free(new_string);      free(new_string);
854      return;      return;
855    }    }
# Line 873  extern void sx_2b(environment *env) { Line 869  extern void sx_2b(environment *env) {
869      b=env->head->item->content.val;      b=env->head->item->content.val;
870      toss(env);      toss(env);
871      if(env->err) return;      if(env->err) return;
872      push_int(&(env->head), a+b);      push_int(env, a+b);
873    }    }
874  }  }
875    
# Line 902  extern void sx_2d(environment *env) { Line 898  extern void sx_2d(environment *env) {
898      b=env->head->item->content.val;      b=env->head->item->content.val;
899      toss(env);      toss(env);
900      if(env->err) return;      if(env->err) return;
901      push_int(&(env->head), b-a);      push_int(env, b-a);
902    }    }
903  }  }
904    
# Line 931  extern void sx_3e(environment *env) { Line 927  extern void sx_3e(environment *env) {
927      b=env->head->item->content.val;      b=env->head->item->content.val;
928      toss(env);      toss(env);
929      if(env->err) return;      if(env->err) return;
930      push_int(&(env->head), b>a);      push_int(env, b>a);
931    }    }
932  }  }
933    
# Line 987  extern void dup(environment *env) { Line 983  extern void dup(environment *env) {
983      env->err=1;      env->err=1;
984      return;      return;
985    }    }
986    push_val(&(env->head), copy_val(env->head->item));    push_val(env, copy_val(env->head->item));
987  }  }
988    
989  /* "if", If-Then */  /* "if", If-Then */
# Line 1078  extern void sx_7768696c65(environment *e Line 1074  extern void sx_7768696c65(environment *e
1074    toss(env); if(env->err) return;    toss(env); if(env->err) return;
1075    
1076    do {    do {
1077      push_val(&(env->head), test);      push_val(env, test);
1078      eval(env);      eval(env);
1079            
1080      if(env->head->item->type != integer) {      if(env->head->item->type != integer) {
# Line 1091  extern void sx_7768696c65(environment *e Line 1087  extern void sx_7768696c65(environment *e
1087      toss(env); if(env->err) return;      toss(env); if(env->err) return;
1088            
1089      if(truth) {      if(truth) {
1090        push_val(&(env->head), loop);        push_val(env, loop);
1091        eval(env);        eval(env);
1092      } else {      } else {
1093        toss(env);        toss(env);
# Line 1132  extern void sx_666f72(environment *env) Line 1128  extern void sx_666f72(environment *env)
1128    iterator= foo->content.ptr;    iterator= foo->content.ptr;
1129    
1130    while(iterator!=NULL) {    while(iterator!=NULL) {
1131      push_val(&(env->head), iterator->item);      push_val(env, iterator->item);
1132      push_val(&(env->head), loop);      push_val(env, loop);
1133      eval(env); if(env->err) return;      eval(env); if(env->err) return;
1134      iterator= iterator->next;      iterator= iterator->next;
1135    }    }
# Line 1145  extern void sx_666f72(environment *env) Line 1141  extern void sx_666f72(environment *env)
1141  /* 'to' */  /* 'to' */
1142  extern void to(environment *env) {  extern void to(environment *env) {
1143    int i, start, ending;    int i, start, ending;
1144      stackitem *temp_head;
1145      value *temp_val;
1146        
1147    if((env->head)==NULL || env->head->next==NULL) {    if((env->head)==NULL || env->head->next==NULL) {
1148      printerr("Too Few Arguments");      printerr("Too Few Arguments");
# Line 1164  extern void to(environment *env) { Line 1162  extern void to(environment *env) {
1162    start= env->head->item->content.val;    start= env->head->item->content.val;
1163    toss(env); if(env->err) return;    toss(env); if(env->err) return;
1164    
1165    push_sym(env, "[");    temp_head= env->head;
1166      env->head= NULL;
1167    
1168    if(ending>=start) {    if(ending>=start) {
1169      for(i= start; i<=ending; i++)      for(i= ending; i>=start; i--)
1170        push_int(&(env->head), i);        push_int(env, i);
1171    } else {    } else {
1172      for(i= start; i>=ending; i--)      for(i= ending; i<=start; i++)
1173        push_int(&(env->head), i);        push_int(env, i);
1174    }    }
1175    
1176    push_sym(env, "[");    temp_val= malloc(sizeof(value));
1177    pack(env); if(env->err) return;    temp_val->content.ptr= env->head;
1178      temp_val->refcount= 1;
1179      temp_val->type= list;
1180      env->head= temp_head;
1181      push_val(env, temp_val);
1182  }  }
1183    
1184  /* Read a string */  /* Read a string */
# Line 1183  extern void readline(environment *env) { Line 1186  extern void readline(environment *env) {
1186    char in_string[101];    char in_string[101];
1187    
1188    fgets(in_string, 100, stdin);    fgets(in_string, 100, stdin);
1189    push_cstring(&(env->head), in_string);    push_cstring(env, in_string);
1190  }  }
1191    
1192  /* Read a value and place on stack */  /* Read a value and place on stack */
# Line 1216  extern void read(environment *env) { Line 1219  extern void read(environment *env) {
1219    if(sscanf(env->in_string, blankform, rest)) {    if(sscanf(env->in_string, blankform, rest)) {
1220      ;      ;
1221    } else if(sscanf(env->in_string, intform, &itemp, rest) > 0) {    } else if(sscanf(env->in_string, intform, &itemp, rest) > 0) {
1222      push_int(&(env->head), itemp);      push_int(env, itemp);
1223    } else if(sscanf(env->in_string, strform, match, rest) > 0) {    } else if(sscanf(env->in_string, strform, match, rest) > 0) {
1224      push_cstring(&(env->head), match);      push_cstring(env, match);
1225    } else if(sscanf(env->in_string, symbform, match, rest) > 0) {    } else if(sscanf(env->in_string, symbform, match, rest) > 0) {
1226      push_sym(env, match);      push_sym(env, match);
1227    } else if(sscanf(env->in_string, ebrackform, rest) > 0) {    } else if(sscanf(env->in_string, ebrackform, rest) > 0) {
     push_sym(env, "[");  
1228      pack(env); if(env->err) return;      pack(env); if(env->err) return;
1229      if(depth!=0) depth--;      if(depth!=0) depth--;
1230    } else if(sscanf(env->in_string, semicform, rest) > 0) {    } else if(sscanf(env->in_string, semicform, rest) > 0) {
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