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revision 1.1 by teddy, Sat Feb 16 00:51:32 2002 UTC revision 1.9 by teddy, Sun Mar 10 10:06:36 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      union {
39        struct {
40          unsigned int mark:1;
41          unsigned int protect:1;
42        } flag;
43        unsigned int no_gc:2;
44      } gc;
45    
46    union {    union {
47      void *ptr;                  /* Pointer to the content */      void *ptr;                  /* Pointer to the content */
48      int val;                    /* ...or an integer */      int i;                      /* ...or an integer */
49        float f;
50    } content;                    /* Stores a pointer or an integer */    } content;                    /* Stores a pointer or an integer */
51    
   int gc_garb;  
   
52  } value;  } value;
53    
54  /* A symbol with a name and possible value */  /* A symbol with a name and possible value */
# Line 53  typedef struct { Line 82  typedef struct {
82    int err;                      /* Error flag */    int err;                      /* Error flag */
83    char *in_string;              /* Input pending to be read */    char *in_string;              /* Input pending to be read */
84    char *free_string;            /* Free this string when all input is    char *free_string;            /* Free this string when all input is
85                                     read from in_string */                                     read from in_string */
86    FILE *inputstream;            /* stdin or a file, most likely */    FILE *inputstream;            /* stdin or a file, most likely */
87    int interactive;              /* print prompts, stack, etc */    int interactive;              /* print prompts, stack, etc */
88  } environment;  } environment;
89    
90  /* A type for pointers to external functions */  /* A type for pointers to external functions */
91  typedef void (*funcp)(environment *); /* funcp is a pointer to a void  typedef void (*funcp)(environment*); /* funcp is a pointer to a void
92                                           function (environment *) */                                           function (environment *) */
93    
94  void init_env(environment *env);  void init_env(environment*);
95  void printerr(const char* in_string);  void printerr(const char*);
96  extern void toss(environment *env);  extern void toss(environment*);
97  symbol **hash(hashtbl in_hashtbl, const char *in_string);  symbol **hash(hashtbl, const char*);
98  value* new_val(environment *env);  value* new_val(environment*);
99  void gc_mark(value *val);  void gc_mark(value*);
100  extern void gc_init(environment *env);  void gc_maybe(environment *env);
101  void push_val(environment *env, value *val);  extern void gc_init(environment*);
102  void push_int(environment *env, int in_val);  void push_val(environment*, value*);
103  void push_cstring(environment *env, const char *in_string);  void push_int(environment*, int);
104  char *mangle_str(const char *old_string);  void push_float(environment*, float);
105  extern void mangle(environment *env);  void push_cstring(environment*, const char*);
106  void push_sym(environment *env, const char *in_string);  char *mangle_str(const char*);
107    extern void mangle(environment*);
108    void push_sym(environment*, const char*);
109  extern void nl();  extern void nl();
110  extern void type(environment *env);  extern void type(environment*);
111  void print_h(stackitem *stack_head, int noquote);  void print_h(stackitem*, int);
112  extern void print_(environment *env);  extern void print_(environment*);
113  extern void print(environment *env);  extern void print(environment*);
114  extern void princ_(environment *env);  extern void princ_(environment*);
115  extern void princ(environment *env);  extern void princ(environment*);
116  void print_st(stackitem *stack_head, long counter);  void print_st(stackitem*, long);
117  extern void printstack(environment *env);  extern void printstack(environment*);
118  extern void swap(environment *env);  extern void swap(environment*);
119  extern void rot(environment *env);  extern void rot(environment*);
120  extern void rcl(environment *env);  extern void rcl(environment*);
121  extern void eval(environment *env);  extern void eval(environment*);
122  extern void rev(environment *env);  extern void rev(environment*);
123  extern void pack(environment *env);  extern void pack(environment*);
124  extern void expand(environment *env);  extern void expand(environment*);
125  extern void eq(environment *env);  extern void eq(environment*);
126  extern void not(environment *env);  extern void not(environment*);
127  extern void neq(environment *env);  extern void neq(environment*);
128  extern void def(environment *env);  extern void def(environment*);
129  extern void quit(environment *env);  extern void quit(environment*);
130  extern void clear(environment *env);  extern void clear(environment*);
131  extern void words(environment *env);  extern void words(environment*);
132  void forget_sym(symbol **hash_entry);  void forget_sym(symbol**);
133  extern void forget(environment *env);  extern void forget(environment*);
134  extern void errn(environment *env);  extern void errn(environment*);
135  extern void sx_2b(environment *env);  extern void sx_2b(environment*);
136  extern void sx_2d(environment *env);  extern void sx_2d(environment*);
137  extern void sx_3e(environment *env);  extern void sx_3e(environment*);
138  value *copy_val(environment *env, value *old_value);  value *copy_val(environment*, value*);
139  extern void sx_647570(environment *env);  extern void sx_647570(environment*);
140  extern void sx_6966(environment *env);  extern void sx_6966(environment*);
141  extern void ifelse(environment *env);  extern void ifelse(environment*);
142  extern void sx_7768696c65(environment *env);  extern void sx_7768696c65(environment*);
143  extern void sx_666f72(environment *env);  extern void sx_666f72(environment*);
144  extern void to(environment *env);  extern void to(environment*);
145  extern void readline(environment *env);  extern void readline(environment*);
146  extern void sx_72656164(environment *env);  extern void sx_72656164(environment*);
147    extern void foreach(environment*);
148    void protect(value*);
149    void unprotect(value*);
150    extern void copying(environment*);
151    extern void warranty(environment*);
152    extern void sx_2a(environment*);
153    extern void sx_2f(environment*);
154    extern void mod(environment*);
155    extern void sx_3c(environment*);
156    extern void sx_3c3d(environment*);
157    extern void sx_3e3d(environment*);
158    extern void sx_646976(environment*);
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