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revision 1.1 by teddy, Sat Feb 16 00:51:32 2002 UTC revision 1.7 by teddy, Sun Mar 10 08:51:31 2002 UTC
# Line 1  Line 1 
1    /*
2        stack - an interactive interpreter for a stack-based language
3        Copyright (C) 2002  Mats Alritzson and Teddy Hogeborn
4    
5        This program is free software; you can redistribute it and/or modify
6        it under the terms of the GNU General Public License as published by
7        the Free Software Foundation; either version 2 of the License, or
8        (at your option) any later version.
9    
10        This program is distributed in the hope that it will be useful,
11        but WITHOUT ANY WARRANTY; without even the implied warranty of
12        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13        GNU General Public License for more details.
14    
15        You should have received a copy of the GNU General Public License
16        along with this program; if not, write to the Free Software
17        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18    
19        Authors: Mats Alritzson <masse@fukt.bth.se>
20                 Teddy Hogeborn <teddy@fukt.bth.se>
21    */
22    
23  #define HASHTBLSIZE 2048  #define HASHTBLSIZE 2048
24    
# Line 7  Line 28 
28  typedef struct {  typedef struct {
29    enum {    enum {
30      integer,      integer,
31        tfloat,
32      string,      string,
33      func,                       /* Function pointer */      func,                       /* Function pointer */
34      symb,      symb,
35      list      list
36    } type;                       /* Type of stack element */    } type:4;                     /* Type of stack element */
37    
38      int gc_garb:1;
39    
40    union {    union {
41      void *ptr;                  /* Pointer to the content */      void *ptr;                  /* Pointer to the content */
42      int val;                    /* ...or an integer */      int i;                      /* ...or an integer */
43        float f;
44    } content;                    /* Stores a pointer or an integer */    } content;                    /* Stores a pointer or an integer */
45    
   int gc_garb;  
   
46  } value;  } value;
47    
48  /* A symbol with a name and possible value */  /* A symbol with a name and possible value */
# Line 46  typedef struct stackitem_struct Line 69  typedef struct stackitem_struct
69     defined symbols */     defined symbols */
70  typedef struct {  typedef struct {
71    stackitem *gc_ref;    stackitem *gc_ref;
72      stackitem *gc_protect;
73    int gc_limit, gc_count;    int gc_limit, gc_count;
74    
75    stackitem *head;              /* Head of the stack */    stackitem *head;              /* Head of the stack */
# Line 53  typedef struct { Line 77  typedef struct {
77    int err;                      /* Error flag */    int err;                      /* Error flag */
78    char *in_string;              /* Input pending to be read */    char *in_string;              /* Input pending to be read */
79    char *free_string;            /* Free this string when all input is    char *free_string;            /* Free this string when all input is
80                                     read from in_string */                                     read from in_string */
81    FILE *inputstream;            /* stdin or a file, most likely */    FILE *inputstream;            /* stdin or a file, most likely */
82    int interactive;              /* print prompts, stack, etc */    int interactive;              /* print prompts, stack, etc */
83  } environment;  } environment;
84    
85  /* A type for pointers to external functions */  /* A type for pointers to external functions */
86  typedef void (*funcp)(environment *); /* funcp is a pointer to a void  typedef void (*funcp)(environment*); /* funcp is a pointer to a void
87                                           function (environment *) */                                           function (environment *) */
88    
89  void init_env(environment *env);  void init_env(environment*);
90  void printerr(const char* in_string);  void printerr(const char*);
91  extern void toss(environment *env);  extern void toss(environment*);
92  symbol **hash(hashtbl in_hashtbl, const char *in_string);  symbol **hash(hashtbl, const char*);
93  value* new_val(environment *env);  value* new_val(environment*);
94  void gc_mark(value *val);  void gc_mark(value*);
95  extern void gc_init(environment *env);  void gc_maybe(environment *env);
96  void push_val(environment *env, value *val);  extern void gc_init(environment*);
97  void push_int(environment *env, int in_val);  void push_val(environment*, value*);
98  void push_cstring(environment *env, const char *in_string);  void push_int(environment*, int);
99  char *mangle_str(const char *old_string);  void push_float(environment*, float);
100  extern void mangle(environment *env);  void push_cstring(environment*, const char*);
101  void push_sym(environment *env, const char *in_string);  char *mangle_str(const char*);
102    extern void mangle(environment*);
103    void push_sym(environment*, const char*);
104  extern void nl();  extern void nl();
105  extern void type(environment *env);  extern void type(environment*);
106  void print_h(stackitem *stack_head, int noquote);  void print_h(stackitem*, int);
107  extern void print_(environment *env);  extern void print_(environment*);
108  extern void print(environment *env);  extern void print(environment*);
109  extern void princ_(environment *env);  extern void princ_(environment*);
110  extern void princ(environment *env);  extern void princ(environment*);
111  void print_st(stackitem *stack_head, long counter);  void print_st(stackitem*, long);
112  extern void printstack(environment *env);  extern void printstack(environment*);
113  extern void swap(environment *env);  extern void swap(environment*);
114  extern void rot(environment *env);  extern void rot(environment*);
115  extern void rcl(environment *env);  extern void rcl(environment*);
116  extern void eval(environment *env);  extern void eval(environment*);
117  extern void rev(environment *env);  extern void rev(environment*);
118  extern void pack(environment *env);  extern void pack(environment*);
119  extern void expand(environment *env);  extern void expand(environment*);
120  extern void eq(environment *env);  extern void eq(environment*);
121  extern void not(environment *env);  extern void not(environment*);
122  extern void neq(environment *env);  extern void neq(environment*);
123  extern void def(environment *env);  extern void def(environment*);
124  extern void quit(environment *env);  extern void quit(environment*);
125  extern void clear(environment *env);  extern void clear(environment*);
126  extern void words(environment *env);  extern void words(environment*);
127  void forget_sym(symbol **hash_entry);  void forget_sym(symbol**);
128  extern void forget(environment *env);  extern void forget(environment*);
129  extern void errn(environment *env);  extern void errn(environment*);
130  extern void sx_2b(environment *env);  extern void sx_2b(environment*);
131  extern void sx_2d(environment *env);  extern void sx_2d(environment*);
132  extern void sx_3e(environment *env);  extern void sx_3e(environment*);
133  value *copy_val(environment *env, value *old_value);  value *copy_val(environment*, value*);
134  extern void sx_647570(environment *env);  extern void sx_647570(environment*);
135  extern void sx_6966(environment *env);  extern void sx_6966(environment*);
136  extern void ifelse(environment *env);  extern void ifelse(environment*);
137  extern void sx_7768696c65(environment *env);  extern void sx_7768696c65(environment*);
138  extern void sx_666f72(environment *env);  extern void sx_666f72(environment*);
139  extern void to(environment *env);  extern void to(environment*);
140  extern void readline(environment *env);  extern void readline(environment*);
141  extern void sx_72656164(environment *env);  extern void sx_72656164(environment*);
142    extern void foreach(environment*);
143    void protect(environment*, value*);
144    void unprotect(environment*);
145    extern void copying(environment*);
146    extern void warranty(environment*);
147    extern void sx_2a(environment*);
148    extern void sx_2f(environment*);
149    extern void mod(environment*);
150    extern void sx_3c(environment*);
151    extern void sx_3c3d(environment*);
152    extern void sx_3e3d(environment*);
153    extern void sx_646976(environment*);
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