/[cvs]/stack/stack.c
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revision 1.71 by masse, Mon Feb 11 22:07:47 2002 UTC revision 1.72 by masse, Tue Feb 12 22:13:12 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 610  extern void pack(environment *env) Line 610  extern void pack(environment *env)
610    temp= malloc(sizeof(stackitem));    temp= malloc(sizeof(stackitem));
611    temp->item= pack;    temp->item= pack;
612    
613    push(&(env->head), temp);    push(env, temp);
614    rev(env);    rev(env);
615  }  }
616    
# Line 670  extern void eq(environment *env) Line 670  extern void eq(environment *env)
670    result= (left==right);    result= (left==right);
671        
672    toss(env); toss(env);    toss(env); toss(env);
673    push_int(&(env->head), result);    push_int(env, result);
674  }  }
675    
676  /* Negates the top element on the stack. */  /* Negates the top element on the stack. */
# Line 692  extern void not(environment *env) Line 692  extern void not(environment *env)
692    
693    val= env->head->item->content.val;    val= env->head->item->content.val;
694    toss(env);    toss(env);
695    push_int(&(env->head), !val);    push_int(env, !val);
696  }  }
697    
698  /* 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 798  extern void forget(environment *env)
798    
799  /* Returns the current error number to the stack */  /* Returns the current error number to the stack */
800  extern void errn(environment *env){  extern void errn(environment *env){
801    push_int(&(env->head), env->err);    push_int(env, env->err);
802  }  }
803    
804  extern void read(environment*);  extern void read(environment*);
# Line 853  extern void sx_2b(environment *env) { Line 853  extern void sx_2b(environment *env) {
853      strcpy(new_string, b_val->content.ptr);      strcpy(new_string, b_val->content.ptr);
854      strcat(new_string, a_val->content.ptr);      strcat(new_string, a_val->content.ptr);
855      free_val(a_val); free_val(b_val);      free_val(a_val); free_val(b_val);
856      push_cstring(&(env->head), new_string);      push_cstring(env, new_string);
857      free(new_string);      free(new_string);
858      return;      return;
859    }    }
# Line 873  extern void sx_2b(environment *env) { Line 873  extern void sx_2b(environment *env) {
873      b=env->head->item->content.val;      b=env->head->item->content.val;
874      toss(env);      toss(env);
875      if(env->err) return;      if(env->err) return;
876      push_int(&(env->head), a+b);      push_int(env, a+b);
877    }    }
878  }  }
879    
# Line 902  extern void sx_2d(environment *env) { Line 902  extern void sx_2d(environment *env) {
902      b=env->head->item->content.val;      b=env->head->item->content.val;
903      toss(env);      toss(env);
904      if(env->err) return;      if(env->err) return;
905      push_int(&(env->head), b-a);      push_int(env, b-a);
906    }    }
907  }  }
908    
# Line 931  extern void sx_3e(environment *env) { Line 931  extern void sx_3e(environment *env) {
931      b=env->head->item->content.val;      b=env->head->item->content.val;
932      toss(env);      toss(env);
933      if(env->err) return;      if(env->err) return;
934      push_int(&(env->head), b>a);      push_int(env, b>a);
935    }    }
936  }  }
937    
# Line 987  extern void dup(environment *env) { Line 987  extern void dup(environment *env) {
987      env->err=1;      env->err=1;
988      return;      return;
989    }    }
990    push_val(&(env->head), copy_val(env->head->item));    push_val(env, copy_val(env->head->item));
991  }  }
992    
993  /* "if", If-Then */  /* "if", If-Then */
# Line 1078  extern void sx_7768696c65(environment *e Line 1078  extern void sx_7768696c65(environment *e
1078    toss(env); if(env->err) return;    toss(env); if(env->err) return;
1079    
1080    do {    do {
1081      push_val(&(env->head), test);      push_val(env, test);
1082      eval(env);      eval(env);
1083            
1084      if(env->head->item->type != integer) {      if(env->head->item->type != integer) {
# Line 1091  extern void sx_7768696c65(environment *e Line 1091  extern void sx_7768696c65(environment *e
1091      toss(env); if(env->err) return;      toss(env); if(env->err) return;
1092            
1093      if(truth) {      if(truth) {
1094        push_val(&(env->head), loop);        push_val(env, loop);
1095        eval(env);        eval(env);
1096      } else {      } else {
1097        toss(env);        toss(env);
# Line 1132  extern void sx_666f72(environment *env) Line 1132  extern void sx_666f72(environment *env)
1132    iterator= foo->content.ptr;    iterator= foo->content.ptr;
1133    
1134    while(iterator!=NULL) {    while(iterator!=NULL) {
1135      push_val(&(env->head), iterator->item);      push_val(env, iterator->item);
1136      push_val(&(env->head), loop);      push_val(env, loop);
1137      eval(env); if(env->err) return;      eval(env); if(env->err) return;
1138      iterator= iterator->next;      iterator= iterator->next;
1139    }    }
# Line 1168  extern void to(environment *env) { Line 1168  extern void to(environment *env) {
1168    
1169    if(ending>=start) {    if(ending>=start) {
1170      for(i= start; i<=ending; i++)      for(i= start; i<=ending; i++)
1171        push_int(&(env->head), i);        push_int(env, i);
1172    } else {    } else {
1173      for(i= start; i>=ending; i--)      for(i= start; i>=ending; i--)
1174        push_int(&(env->head), i);        push_int(env, i);
1175    }    }
1176    
1177    push_sym(env, "[");    push_sym(env, "[");
# Line 1183  extern void readline(environment *env) { Line 1183  extern void readline(environment *env) {
1183    char in_string[101];    char in_string[101];
1184    
1185    fgets(in_string, 100, stdin);    fgets(in_string, 100, stdin);
1186    push_cstring(&(env->head), in_string);    push_cstring(env, in_string);
1187  }  }
1188    
1189  /* Read a value and place on stack */  /* Read a value and place on stack */
# Line 1216  extern void read(environment *env) { Line 1216  extern void read(environment *env) {
1216    if(sscanf(env->in_string, blankform, rest)) {    if(sscanf(env->in_string, blankform, rest)) {
1217      ;      ;
1218    } else if(sscanf(env->in_string, intform, &itemp, rest) > 0) {    } else if(sscanf(env->in_string, intform, &itemp, rest) > 0) {
1219      push_int(&(env->head), itemp);      push_int(env, itemp);
1220    } else if(sscanf(env->in_string, strform, match, rest) > 0) {    } else if(sscanf(env->in_string, strform, match, rest) > 0) {
1221      push_cstring(&(env->head), match);      push_cstring(env, match);
1222    } else if(sscanf(env->in_string, symbform, match, rest) > 0) {    } else if(sscanf(env->in_string, symbform, match, rest) > 0) {
1223      push_sym(env, match);      push_sym(env, match);
1224    } else if(sscanf(env->in_string, ebrackform, rest) > 0) {    } else if(sscanf(env->in_string, ebrackform, rest) > 0) {
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