/[cvs]/stack/stack.h
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revision 1.22 by masse, Mon Aug 4 11:22:02 2003 UTC revision 1.27 by masse, Wed Aug 13 11:58:00 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    
49  #ifdef __linux__  #ifdef __linux__
50  /* mtrace, muntrace */  /* mtrace, muntrace */
# Line 57  Line 61 
61    
62  struct cons_struct;  struct cons_struct;
63  struct symbol_struct;  struct symbol_struct;
64    struct environment_struct;
65    
66    /* A type for pointers to external functions */
67    typedef void (*funcp)(struct environment_struct*);
68    /* funcp is a pointer to a void function (environment *) */
69    
70    enum type_enum {
71      unknown,
72      empty,                        /* The empty list */
73      integer,
74      tfloat,
75      string,
76      func,                 /* Function pointer */
77      symb,                 /* Symbol */
78      tcons,                        /* A pair of two values */
79      port                  /* An I/O port */
80    };                      /* Type of stack element */
81    
82    
83  /* A value of some type */  /* A value of some type */
84  typedef struct {  typedef struct {
85    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 */  
86    
87    union {    union {
88      struct {      struct {
# Line 86  typedef struct { Line 99  typedef struct {
99      FILE *p;                    /* ...or an I/O stream */      FILE *p;                    /* ...or an I/O stream */
100      int i;                      /* ...or an integer */      int i;                      /* ...or an integer */
101      float f;                    /* ...or a floating point number */      float f;                    /* ...or a floating point number */
102        funcp func;                 /* ...or a function pointer */
103        char *string;               /* ...or a string */
104    } content;                    /* Stores a pointer or an integer */    } content;                    /* Stores a pointer or an integer */
105    
106  } value;  } value;
# Line 121  typedef struct { Line 136  typedef struct {
136    value *head;                  /* Head of the stack */    value *head;                  /* Head of the stack */
137    hashtbl symbols;              /* Hash table of all variable bindings */    hashtbl symbols;              /* Hash table of all variable bindings */
138    int err;                      /* Error flag */    int err;                      /* Error flag */
139      char *errsymb;
140    char *in_string;              /* Input pending to be read */    char *in_string;              /* Input pending to be read */
141    char *free_string;            /* Free this string when all input is    char *free_string;            /* Free this string when all input is
142                                     read from in_string */                                     read from in_string */
# Line 133  typedef struct { Line 149  typedef struct {
149    int gc_count;                 /* Amount currently allocated */    int gc_count;                 /* Amount currently allocated */
150  } environment;  } environment;
151    
 /* A type for pointers to external functions */  
 typedef void (*funcp)(environment*); /* funcp is a pointer to a void  
                                          function (environment *) */  
152    
153  void init_env(environment*);  void init_env(environment*);
154  void printerr(const char*);  void printerr(environment*);
155  extern void toss(environment*);  extern void toss(environment*);
156  symbol **hash(hashtbl, const char*);  symbol **hash(hashtbl, const char*);
157  value* new_val(environment*);  value* new_val(environment*);
# Line 225  void assocgen(environment*, funcp); Line 238  void assocgen(environment*, funcp);
238  extern void sx_646f(environment *);  extern void sx_646f(environment *);
239  extern void sx_6f70656e(environment*);  extern void sx_6f70656e(environment*);
240  extern void sx_636c6f7365(environment*);  extern void sx_636c6f7365(environment*);
241    int check_args(environment*, ...);
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