/[cvs]/stack/stack.h
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revision 1.22 by masse, Mon Aug 4 11:22:02 2003 UTC revision 1.28 by masse, Mon Aug 18 14:39:16 2003 UTC
# Line 41  Line 41 
41  #include <sysexits.h>  #include <sysexits.h>
42  /* assert */  /* assert */
43  #include <assert.h>  #include <assert.h>
44    /* waitpid */
45    #include <sys/wait.h>
46    /* va_list, va_start, va_arg, va_end */
47    #include <stdarg.h>
48    /* time */
49    #include <time.h>
50    
51  #ifdef __linux__  #ifdef __linux__
52  /* mtrace, muntrace */  /* mtrace, muntrace */
# Line 57  Line 63 
63    
64  struct cons_struct;  struct cons_struct;
65  struct symbol_struct;  struct symbol_struct;
66    struct environment_struct;
67    
68    /* A type for pointers to external functions */
69    typedef void (*funcp)(struct environment_struct*);
70    /* funcp is a pointer to a void function (environment *) */
71    
72    enum type_enum {
73      unknown,
74      empty,                        /* The empty list */
75      integer,
76      tfloat,
77      string,
78      func,                 /* Function pointer */
79      symb,                 /* Symbol */
80      tcons,                        /* A pair of two values */
81      port                  /* An I/O port */
82    };                      /* Type of stack element */
83    
84    
85  /* A value of some type */  /* A value of some type */
86  typedef struct {  typedef struct {
87    enum {    enum type_enum type:4;
     empty,                      /* The empty list */  
     integer,  
     tfloat,  
     string,  
     func,                       /* Function pointer */  
     symb,                       /* Symbol */  
     tcons,                      /* A pair of two values */  
     port                        /* An I/O port */  
   } type:4;                     /* Type of stack element */  
88    
89    union {    union {
90      struct {      struct {
# Line 86  typedef struct { Line 101  typedef struct {
101      FILE *p;                    /* ...or an I/O stream */      FILE *p;                    /* ...or an I/O stream */
102      int i;                      /* ...or an integer */      int i;                      /* ...or an integer */
103      float f;                    /* ...or a floating point number */      float f;                    /* ...or a floating point number */
104        funcp func;                 /* ...or a function pointer */
105        char *string;               /* ...or a string */
106    } content;                    /* Stores a pointer or an integer */    } content;                    /* Stores a pointer or an integer */
107    
108  } value;  } value;
# Line 121  typedef struct { Line 138  typedef struct {
138    value *head;                  /* Head of the stack */    value *head;                  /* Head of the stack */
139    hashtbl symbols;              /* Hash table of all variable bindings */    hashtbl symbols;              /* Hash table of all variable bindings */
140    int err;                      /* Error flag */    int err;                      /* Error flag */
141      char *errsymb;
142    char *in_string;              /* Input pending to be read */    char *in_string;              /* Input pending to be read */
143    char *free_string;            /* Free this string when all input is    char *free_string;            /* Free this string when all input is
144                                     read from in_string */                                     read from in_string */
# Line 133  typedef struct { Line 151  typedef struct {
151    int gc_count;                 /* Amount currently allocated */    int gc_count;                 /* Amount currently allocated */
152  } environment;  } environment;
153    
 /* A type for pointers to external functions */  
 typedef void (*funcp)(environment*); /* funcp is a pointer to a void  
                                          function (environment *) */  
154    
155  void init_env(environment*);  void init_env(environment*);
156  void printerr(const char*);  void printerr(environment*);
157  extern void toss(environment*);  extern void toss(environment*);
158  symbol **hash(hashtbl, const char*);  symbol **hash(hashtbl, const char*);
159  value* new_val(environment*);  value* new_val(environment*);
# Line 225  void assocgen(environment*, funcp); Line 240  void assocgen(environment*, funcp);
240  extern void sx_646f(environment *);  extern void sx_646f(environment *);
241  extern void sx_6f70656e(environment*);  extern void sx_6f70656e(environment*);
242  extern void sx_636c6f7365(environment*);  extern void sx_636c6f7365(environment*);
243    int check_args(environment*, int, ...);
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