30 |
/* A value of some type */ |
/* A value of some type */ |
31 |
typedef struct { |
typedef struct { |
32 |
enum { |
enum { |
33 |
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empty, /* The empty list */ |
34 |
integer, |
integer, |
35 |
tfloat, |
tfloat, |
36 |
string, |
string, |
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 |
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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 |
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 { |
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stackitem *gc_ref; |
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int gc_limit, gc_count; |
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|
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 */ |
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 |
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97 |
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/* Garbage Collector stuff*/ |
98 |
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stackitem *gc_ref; /* Stack of all allocated values */ |
99 |
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int gc_limit; /* Run GC when this much is allocated */ |
100 |
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int gc_count; /* Amount currently allocated */ |
101 |
} environment; |
} environment; |
102 |
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|
103 |
/* A type for pointers to external functions */ |
/* A type for pointers to external functions */ |
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 |
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extern void then(environment*); |