/[cvs]/stack/stack.h
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revision 1.13 by masse, Tue Mar 12 14:53:19 2002 UTC revision 1.16 by teddy, Sun Mar 17 11:26:35 2002 UTC
# Line 30  struct symbol_struct; Line 30  struct symbol_struct;
30  /* A value of some type */  /* A value of some type */
31  typedef struct {  typedef struct {
32    enum {    enum {
33        empty,                      /* The empty list */
34      integer,      integer,
35      tfloat,      tfloat,
36      string,      string,
# Line 67  typedef struct stackitem_struct Line 68  typedef struct stackitem_struct
68  typedef struct cons_struct {    /* A pair of two values */  typedef struct cons_struct {    /* A pair of two values */
69    value *car;    value *car;
70    value *cdr;    value *cdr;
71  } cons;  } pair;
72    
73  /* A symbol with a name and possible value */  /* A symbol with a name and possible value */
74  /* (These do not need reference counters, they are kept unique by  /* (These do not need reference counters, they are kept unique by
# Line 84  typedef symbol *hashtbl[HASHTBLSIZE]; /* Line 85  typedef symbol *hashtbl[HASHTBLSIZE]; /*
85  /* An environment; gives access to the stack and a hash table of  /* An environment; gives access to the stack and a hash table of
86     defined symbols */     defined symbols */
87  typedef struct {  typedef struct {
   stackitem *gc_ref;  
   int gc_limit, gc_count;  
   
88    value *head;                  /* Head of the stack */    value *head;                  /* Head of the stack */
89    hashtbl symbols;              /* Hash table of all variable bindings */    hashtbl symbols;              /* Hash table of all variable bindings */
90    int err;                      /* Error flag */    int err;                      /* Error flag */
# Line 95  typedef struct { Line 93  typedef struct {
93                                     read from in_string */                                     read from in_string */
94    FILE *inputstream;            /* stdin or a file, most likely */    FILE *inputstream;            /* stdin or a file, most likely */
95    int interactive;              /* print prompts, stack, etc */    int interactive;              /* print prompts, stack, etc */
96    
97      /* Garbage Collector stuff*/
98      stackitem *gc_ref;            /* Stack of all allocated values */
99      int gc_limit;                 /* Run GC when this much is allocated */
100      int gc_count;                 /* Amount currently allocated */
101  } environment;  } environment;
102    
103  /* A type for pointers to external functions */  /* A type for pointers to external functions */
# Line 166  extern void sx_3c(environment*); Line 169  extern void sx_3c(environment*);
169  extern void sx_3c3d(environment*);  extern void sx_3c3d(environment*);
170  extern void sx_3e3d(environment*);  extern void sx_3e3d(environment*);
171  extern void sx_646976(environment*);  extern void sx_646976(environment*);
172    extern void then(environment*);
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