1 |
teddy |
1.116 |
/* -*- coding: utf-8; -*- */ |
2 |
teddy |
1.91 |
/* |
3 |
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stack - an interactive interpreter for a stack-based language |
4 |
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Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn |
5 |
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6 |
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This program is free software; you can redistribute it and/or modify |
7 |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
10 |
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11 |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
17 |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 |
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Authors: Mats Alritzson <masse@fukt.bth.se> |
21 |
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Teddy Hogeborn <teddy@fukt.bth.se> |
22 |
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*/ |
23 |
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|
24 |
teddy |
1.88 |
#include "stack.h" |
25 |
masse |
1.1 |
|
26 |
masse |
1.136 |
const char* start_message= "Stack version $Revision: 1.135 $\n\ |
27 |
masse |
1.132 |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
28 |
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Stack comes with ABSOLUTELY NO WARRANTY; for details type 'warranty;'.\n\ |
29 |
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This is free software, and you are welcome to redistribute it\n\ |
30 |
masse |
1.136 |
under certain conditions; type 'copying;' for details."; |
31 |
masse |
1.132 |
|
32 |
|
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|
33 |
teddy |
1.28 |
/* Initialize a newly created environment */ |
34 |
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void init_env(environment *env) |
35 |
masse |
1.1 |
{ |
36 |
masse |
1.46 |
int i; |
37 |
masse |
1.1 |
|
38 |
teddy |
1.100 |
env->gc_limit= 400000; |
39 |
masse |
1.87 |
env->gc_count= 0; |
40 |
masse |
1.90 |
env->gc_ref= NULL; |
41 |
masse |
1.87 |
|
42 |
teddy |
1.111 |
env->head= new_val(env); |
43 |
masse |
1.1 |
for(i= 0; i<HASHTBLSIZE; i++) |
44 |
teddy |
1.28 |
env->symbols[i]= NULL; |
45 |
teddy |
1.84 |
env->err= 0; |
46 |
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env->in_string= NULL; |
47 |
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env->free_string= NULL; |
48 |
|
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env->inputstream= stdin; |
49 |
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env->interactive= 1; |
50 |
masse |
1.1 |
} |
51 |
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|
52 |
masse |
1.132 |
|
53 |
masse |
1.135 |
void printerr(environment *env) |
54 |
masse |
1.95 |
{ |
55 |
masse |
1.135 |
char *in_string; |
56 |
|
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|
57 |
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switch(env->err) { |
58 |
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case 0: |
59 |
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return; |
60 |
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case 1: |
61 |
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in_string= "Too Few Arguments"; |
62 |
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break; |
63 |
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case 2: |
64 |
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in_string= "Bad Argument Type"; |
65 |
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break; |
66 |
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case 3: |
67 |
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in_string= "Unbound Variable"; |
68 |
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break; |
69 |
masse |
1.136 |
case 5: |
70 |
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return perror(env->errsymb); |
71 |
masse |
1.135 |
default: |
72 |
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in_string= "Unknown error"; |
73 |
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break; |
74 |
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} |
75 |
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|
76 |
masse |
1.133 |
fprintf(stderr, "\"%s\":\nErr: %s\n", env->errsymb, in_string); |
77 |
teddy |
1.48 |
} |
78 |
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|
79 |
masse |
1.132 |
|
80 |
teddy |
1.27 |
/* Returns a pointer to a pointer to an element in the hash table. */ |
81 |
teddy |
1.28 |
symbol **hash(hashtbl in_hashtbl, const char *in_string) |
82 |
masse |
1.1 |
{ |
83 |
masse |
1.46 |
int i= 0; |
84 |
|
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unsigned int out_hash= 0; |
85 |
teddy |
1.18 |
char key= '\0'; |
86 |
teddy |
1.28 |
symbol **position; |
87 |
masse |
1.1 |
|
88 |
masse |
1.16 |
while(1){ /* Hash in_string */ |
89 |
masse |
1.1 |
key= in_string[i++]; |
90 |
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if(key=='\0') |
91 |
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break; |
92 |
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out_hash= out_hash*32+key; |
93 |
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} |
94 |
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|
95 |
|
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out_hash= out_hash%HASHTBLSIZE; |
96 |
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position= &(in_hashtbl[out_hash]); |
97 |
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|
98 |
masse |
1.25 |
while(1){ |
99 |
teddy |
1.18 |
if(*position==NULL) /* If empty */ |
100 |
masse |
1.1 |
return position; |
101 |
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|
102 |
teddy |
1.18 |
if(strcmp(in_string, (*position)->id)==0) /* If match */ |
103 |
masse |
1.1 |
return position; |
104 |
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|
105 |
masse |
1.16 |
position= &((*position)->next); /* Try next */ |
106 |
masse |
1.1 |
} |
107 |
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} |
108 |
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|
109 |
masse |
1.132 |
|
110 |
masse |
1.95 |
/* Create new value */ |
111 |
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value* new_val(environment *env) |
112 |
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{ |
113 |
masse |
1.87 |
value *nval= malloc(sizeof(value)); |
114 |
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stackitem *nitem= malloc(sizeof(stackitem)); |
115 |
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|
116 |
teddy |
1.118 |
assert(nval != NULL); |
117 |
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assert(nitem != NULL); |
118 |
|
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|
119 |
masse |
1.87 |
nval->content.ptr= NULL; |
120 |
teddy |
1.117 |
nval->type= empty; |
121 |
masse |
1.87 |
|
122 |
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nitem->item= nval; |
123 |
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nitem->next= env->gc_ref; |
124 |
masse |
1.102 |
|
125 |
masse |
1.87 |
env->gc_ref= nitem; |
126 |
|
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|
127 |
teddy |
1.101 |
env->gc_count += sizeof(value); |
128 |
teddy |
1.99 |
nval->gc.flag.mark= 0; |
129 |
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nval->gc.flag.protect= 0; |
130 |
masse |
1.93 |
|
131 |
masse |
1.87 |
return nval; |
132 |
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} |
133 |
|
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|
134 |
masse |
1.126 |
|
135 |
masse |
1.95 |
/* Mark values recursively. |
136 |
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Marked values are not collected by the GC. */ |
137 |
teddy |
1.96 |
inline void gc_mark(value *val) |
138 |
masse |
1.95 |
{ |
139 |
masse |
1.102 |
if(val==NULL || val->gc.flag.mark) |
140 |
masse |
1.87 |
return; |
141 |
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|
142 |
teddy |
1.99 |
val->gc.flag.mark= 1; |
143 |
masse |
1.87 |
|
144 |
masse |
1.104 |
if(val->type==tcons) { |
145 |
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gc_mark(CAR(val)); |
146 |
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gc_mark(CDR(val)); |
147 |
masse |
1.87 |
} |
148 |
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} |
149 |
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|
150 |
teddy |
1.96 |
|
151 |
masse |
1.95 |
/* Start GC */ |
152 |
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extern void gc_init(environment *env) |
153 |
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{ |
154 |
masse |
1.102 |
stackitem *new_head= NULL, *titem; |
155 |
masse |
1.87 |
symbol *tsymb; |
156 |
|
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int i; |
157 |
|
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|
158 |
masse |
1.102 |
if(env->interactive) |
159 |
teddy |
1.101 |
printf("Garbage collecting."); |
160 |
teddy |
1.100 |
|
161 |
masse |
1.95 |
/* Mark values on stack */ |
162 |
masse |
1.104 |
gc_mark(env->head); |
163 |
masse |
1.87 |
|
164 |
masse |
1.102 |
if(env->interactive) |
165 |
teddy |
1.100 |
printf("."); |
166 |
masse |
1.102 |
|
167 |
masse |
1.93 |
/* Mark values in hashtable */ |
168 |
masse |
1.102 |
for(i= 0; i<HASHTBLSIZE; i++) |
169 |
|
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for(tsymb= env->symbols[i]; tsymb!=NULL; tsymb= tsymb->next) |
170 |
masse |
1.97 |
if (tsymb->val != NULL) |
171 |
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gc_mark(tsymb->val); |
172 |
masse |
1.87 |
|
173 |
masse |
1.102 |
if(env->interactive) |
174 |
teddy |
1.100 |
printf("."); |
175 |
masse |
1.102 |
|
176 |
masse |
1.87 |
env->gc_count= 0; |
177 |
|
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|
178 |
masse |
1.95 |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
179 |
teddy |
1.99 |
if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
180 |
masse |
1.93 |
|
181 |
teddy |
1.116 |
/* Remove content */ |
182 |
|
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switch(env->gc_ref->item->type){ |
183 |
|
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case string: |
184 |
masse |
1.130 |
free(env->gc_ref->item->content.string); |
185 |
teddy |
1.116 |
break; |
186 |
|
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case tcons: |
187 |
|
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free(env->gc_ref->item->content.c); |
188 |
|
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break; |
189 |
teddy |
1.124 |
case port: |
190 |
teddy |
1.116 |
case empty: |
191 |
masse |
1.133 |
case unknown: |
192 |
teddy |
1.116 |
case integer: |
193 |
|
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case tfloat: |
194 |
|
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case func: |
195 |
|
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case symb: |
196 |
|
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/* Symbol strings are freed when walking the hash table */ |
197 |
masse |
1.126 |
break; |
198 |
teddy |
1.116 |
} |
199 |
masse |
1.102 |
|
200 |
masse |
1.93 |
free(env->gc_ref->item); /* Remove from gc_ref */ |
201 |
masse |
1.87 |
titem= env->gc_ref->next; |
202 |
masse |
1.93 |
free(env->gc_ref); /* Remove value */ |
203 |
masse |
1.87 |
env->gc_ref= titem; |
204 |
masse |
1.97 |
continue; |
205 |
teddy |
1.110 |
} |
206 |
masse |
1.132 |
|
207 |
teddy |
1.110 |
#ifdef DEBUG |
208 |
|
|
printf("Kept value (%p)", env->gc_ref->item); |
209 |
|
|
if(env->gc_ref->item->gc.flag.mark) |
210 |
|
|
printf(" (marked)"); |
211 |
|
|
if(env->gc_ref->item->gc.flag.protect) |
212 |
|
|
printf(" (protected)"); |
213 |
|
|
switch(env->gc_ref->item->type){ |
214 |
|
|
case integer: |
215 |
|
|
printf(" integer: %d", env->gc_ref->item->content.i); |
216 |
|
|
break; |
217 |
|
|
case func: |
218 |
masse |
1.128 |
printf(" func: %p", env->gc_ref->item->content.func); |
219 |
teddy |
1.110 |
break; |
220 |
|
|
case symb: |
221 |
|
|
printf(" symb: %s", env->gc_ref->item->content.sym->id); |
222 |
|
|
break; |
223 |
|
|
case tcons: |
224 |
masse |
1.127 |
printf(" tcons: %p\t%p", CAR(env->gc_ref->item), |
225 |
|
|
CDR(env->gc_ref->item)); |
226 |
teddy |
1.110 |
break; |
227 |
|
|
default: |
228 |
|
|
printf(" <unknown %d>", (env->gc_ref->item->type)); |
229 |
|
|
} |
230 |
|
|
printf("\n"); |
231 |
|
|
#endif /* DEBUG */ |
232 |
masse |
1.102 |
|
233 |
|
|
/* Keep values */ |
234 |
|
|
env->gc_count += sizeof(value); |
235 |
|
|
if(env->gc_ref->item->type==string) |
236 |
masse |
1.128 |
env->gc_count += strlen(env->gc_ref->item->content.string)+1; |
237 |
masse |
1.97 |
|
238 |
|
|
titem= env->gc_ref->next; |
239 |
|
|
env->gc_ref->next= new_head; |
240 |
|
|
new_head= env->gc_ref; |
241 |
teddy |
1.99 |
new_head->item->gc.flag.mark= 0; |
242 |
masse |
1.97 |
env->gc_ref= titem; |
243 |
masse |
1.87 |
} |
244 |
|
|
|
245 |
teddy |
1.100 |
if (env->gc_limit < env->gc_count*2) |
246 |
|
|
env->gc_limit= env->gc_count*2; |
247 |
teddy |
1.101 |
|
248 |
masse |
1.87 |
env->gc_ref= new_head; |
249 |
teddy |
1.100 |
|
250 |
masse |
1.102 |
if(env->interactive) |
251 |
teddy |
1.110 |
printf("done (%d bytes still allocated)\n", env->gc_count); |
252 |
teddy |
1.100 |
|
253 |
masse |
1.87 |
} |
254 |
|
|
|
255 |
masse |
1.132 |
|
256 |
masse |
1.126 |
inline void gc_maybe(environment *env) |
257 |
|
|
{ |
258 |
|
|
if(env->gc_count < env->gc_limit) |
259 |
|
|
return; |
260 |
|
|
else |
261 |
|
|
return gc_init(env); |
262 |
|
|
} |
263 |
|
|
|
264 |
masse |
1.132 |
|
265 |
masse |
1.95 |
/* Protect values from GC */ |
266 |
masse |
1.98 |
void protect(value *val) |
267 |
masse |
1.90 |
{ |
268 |
masse |
1.102 |
if(val==NULL || val->gc.flag.protect) |
269 |
masse |
1.98 |
return; |
270 |
|
|
|
271 |
teddy |
1.99 |
val->gc.flag.protect= 1; |
272 |
masse |
1.98 |
|
273 |
masse |
1.104 |
if(val->type==tcons) { |
274 |
|
|
protect(CAR(val)); |
275 |
|
|
protect(CDR(val)); |
276 |
masse |
1.98 |
} |
277 |
masse |
1.90 |
} |
278 |
|
|
|
279 |
masse |
1.132 |
|
280 |
masse |
1.95 |
/* Unprotect values from GC */ |
281 |
masse |
1.98 |
void unprotect(value *val) |
282 |
masse |
1.90 |
{ |
283 |
masse |
1.102 |
if(val==NULL || !(val->gc.flag.protect)) |
284 |
masse |
1.98 |
return; |
285 |
|
|
|
286 |
teddy |
1.99 |
val->gc.flag.protect= 0; |
287 |
masse |
1.98 |
|
288 |
masse |
1.104 |
if(val->type==tcons) { |
289 |
|
|
unprotect(CAR(val)); |
290 |
|
|
unprotect(CDR(val)); |
291 |
masse |
1.98 |
} |
292 |
masse |
1.90 |
} |
293 |
|
|
|
294 |
masse |
1.132 |
|
295 |
teddy |
1.29 |
/* Push a value onto the stack */ |
296 |
masse |
1.72 |
void push_val(environment *env, value *val) |
297 |
teddy |
1.29 |
{ |
298 |
masse |
1.104 |
value *new_value= new_val(env); |
299 |
masse |
1.102 |
|
300 |
teddy |
1.115 |
new_value->content.c= malloc(sizeof(pair)); |
301 |
masse |
1.108 |
assert(new_value->content.c!=NULL); |
302 |
teddy |
1.116 |
env->gc_count += sizeof(pair); |
303 |
masse |
1.104 |
new_value->type= tcons; |
304 |
|
|
CAR(new_value)= val; |
305 |
|
|
CDR(new_value)= env->head; |
306 |
|
|
env->head= new_value; |
307 |
teddy |
1.29 |
} |
308 |
|
|
|
309 |
masse |
1.132 |
|
310 |
masse |
1.95 |
/* Push an integer onto the stack */ |
311 |
masse |
1.72 |
void push_int(environment *env, int in_val) |
312 |
masse |
1.1 |
{ |
313 |
masse |
1.87 |
value *new_value= new_val(env); |
314 |
teddy |
1.28 |
|
315 |
masse |
1.93 |
new_value->content.i= in_val; |
316 |
teddy |
1.28 |
new_value->type= integer; |
317 |
masse |
1.1 |
|
318 |
masse |
1.75 |
push_val(env, new_value); |
319 |
masse |
1.1 |
} |
320 |
|
|
|
321 |
masse |
1.132 |
|
322 |
masse |
1.95 |
/* Push a floating point number onto the stack */ |
323 |
masse |
1.93 |
void push_float(environment *env, float in_val) |
324 |
|
|
{ |
325 |
|
|
value *new_value= new_val(env); |
326 |
|
|
|
327 |
|
|
new_value->content.f= in_val; |
328 |
|
|
new_value->type= tfloat; |
329 |
|
|
|
330 |
|
|
push_val(env, new_value); |
331 |
|
|
} |
332 |
|
|
|
333 |
masse |
1.132 |
|
334 |
masse |
1.14 |
/* Copy a string onto the stack. */ |
335 |
masse |
1.72 |
void push_cstring(environment *env, const char *in_string) |
336 |
masse |
1.1 |
{ |
337 |
masse |
1.87 |
value *new_value= new_val(env); |
338 |
teddy |
1.101 |
int length= strlen(in_string)+1; |
339 |
teddy |
1.28 |
|
340 |
masse |
1.128 |
new_value->content.string= malloc(length); |
341 |
teddy |
1.118 |
assert(new_value != NULL); |
342 |
teddy |
1.101 |
env->gc_count += length; |
343 |
masse |
1.128 |
strcpy(new_value->content.string, in_string); |
344 |
teddy |
1.28 |
new_value->type= string; |
345 |
masse |
1.1 |
|
346 |
masse |
1.75 |
push_val(env, new_value); |
347 |
masse |
1.1 |
} |
348 |
|
|
|
349 |
masse |
1.132 |
|
350 |
teddy |
1.48 |
/* Mangle a symbol name to a valid C identifier name */ |
351 |
masse |
1.95 |
char *mangle_str(const char *old_string) |
352 |
|
|
{ |
353 |
masse |
1.90 |
char validchars[]= "0123456789abcdef"; |
354 |
teddy |
1.48 |
char *new_string, *current; |
355 |
|
|
|
356 |
masse |
1.90 |
new_string= malloc((strlen(old_string)*2)+4); |
357 |
teddy |
1.118 |
assert(new_string != NULL); |
358 |
teddy |
1.48 |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
359 |
masse |
1.90 |
current= new_string+3; |
360 |
masse |
1.132 |
|
361 |
teddy |
1.48 |
while(old_string[0] != '\0'){ |
362 |
masse |
1.90 |
current[0]= validchars[(unsigned char)(old_string[0])/16]; |
363 |
|
|
current[1]= validchars[(unsigned char)(old_string[0])%16]; |
364 |
|
|
current+= 2; |
365 |
teddy |
1.48 |
old_string++; |
366 |
|
|
} |
367 |
masse |
1.90 |
current[0]= '\0'; |
368 |
teddy |
1.48 |
|
369 |
|
|
return new_string; /* The caller must free() it */ |
370 |
|
|
} |
371 |
|
|
|
372 |
masse |
1.132 |
|
373 |
teddy |
1.28 |
/* Push a symbol onto the stack. */ |
374 |
teddy |
1.35 |
void push_sym(environment *env, const char *in_string) |
375 |
masse |
1.1 |
{ |
376 |
teddy |
1.28 |
value *new_value; /* A new symbol value */ |
377 |
|
|
/* ...which might point to... */ |
378 |
teddy |
1.29 |
symbol **new_symbol; /* (if needed) A new actual symbol */ |
379 |
teddy |
1.28 |
/* ...which, if possible, will be bound to... */ |
380 |
|
|
value *new_fvalue; /* (if needed) A new function value */ |
381 |
|
|
/* ...which will point to... */ |
382 |
|
|
void *funcptr; /* A function pointer */ |
383 |
|
|
|
384 |
|
|
static void *handle= NULL; /* Dynamic linker handle */ |
385 |
teddy |
1.48 |
const char *dlerr; /* Dynamic linker error */ |
386 |
|
|
char *mangled; /* Mangled function name */ |
387 |
teddy |
1.28 |
|
388 |
masse |
1.87 |
new_value= new_val(env); |
389 |
masse |
1.93 |
new_fvalue= new_val(env); |
390 |
teddy |
1.28 |
|
391 |
|
|
/* The new value is a symbol */ |
392 |
|
|
new_value->type= symb; |
393 |
|
|
|
394 |
|
|
/* Look up the symbol name in the hash table */ |
395 |
teddy |
1.29 |
new_symbol= hash(env->symbols, in_string); |
396 |
masse |
1.130 |
new_value->content.sym= *new_symbol; |
397 |
teddy |
1.28 |
|
398 |
teddy |
1.30 |
if(*new_symbol==NULL) { /* If symbol was undefined */ |
399 |
teddy |
1.28 |
|
400 |
|
|
/* Create a new symbol */ |
401 |
teddy |
1.30 |
(*new_symbol)= malloc(sizeof(symbol)); |
402 |
teddy |
1.118 |
assert((*new_symbol) != NULL); |
403 |
teddy |
1.29 |
(*new_symbol)->val= NULL; /* undefined value */ |
404 |
|
|
(*new_symbol)->next= NULL; |
405 |
|
|
(*new_symbol)->id= malloc(strlen(in_string)+1); |
406 |
teddy |
1.118 |
assert((*new_symbol)->id != NULL); |
407 |
teddy |
1.29 |
strcpy((*new_symbol)->id, in_string); |
408 |
masse |
1.1 |
|
409 |
teddy |
1.28 |
/* Intern the new symbol in the hash table */ |
410 |
masse |
1.130 |
new_value->content.sym= *new_symbol; |
411 |
masse |
1.1 |
|
412 |
teddy |
1.28 |
/* Try to load the symbol name as an external function, to see if |
413 |
|
|
we should bind the symbol to a new function pointer value */ |
414 |
masse |
1.16 |
if(handle==NULL) /* If no handle */ |
415 |
teddy |
1.28 |
handle= dlopen(NULL, RTLD_LAZY); |
416 |
masse |
1.6 |
|
417 |
masse |
1.90 |
mangled= mangle_str(in_string); /* mangle the name */ |
418 |
teddy |
1.86 |
funcptr= dlsym(handle, mangled); /* and try to find it */ |
419 |
masse |
1.95 |
|
420 |
masse |
1.90 |
dlerr= dlerror(); |
421 |
teddy |
1.48 |
if(dlerr != NULL) { /* If no function was found */ |
422 |
teddy |
1.86 |
funcptr= dlsym(handle, in_string); /* Get function pointer */ |
423 |
masse |
1.90 |
dlerr= dlerror(); |
424 |
teddy |
1.48 |
} |
425 |
masse |
1.95 |
|
426 |
teddy |
1.48 |
if(dlerr==NULL) { /* If a function was found */ |
427 |
masse |
1.90 |
new_fvalue->type= func; /* The new value is a function pointer */ |
428 |
masse |
1.128 |
new_fvalue->content.func= funcptr; /* Store function pointer */ |
429 |
teddy |
1.29 |
(*new_symbol)->val= new_fvalue; /* Bind the symbol to the new |
430 |
|
|
function value */ |
431 |
teddy |
1.28 |
} |
432 |
masse |
1.95 |
|
433 |
|
|
free(mangled); |
434 |
masse |
1.1 |
} |
435 |
masse |
1.95 |
|
436 |
masse |
1.75 |
push_val(env, new_value); |
437 |
masse |
1.1 |
} |
438 |
|
|
|
439 |
masse |
1.132 |
|
440 |
teddy |
1.114 |
/* Print a value */ |
441 |
masse |
1.132 |
void print_val(environment *env, value *val, int noquote, stackitem *stack, |
442 |
|
|
FILE *stream) |
443 |
masse |
1.8 |
{ |
444 |
teddy |
1.117 |
stackitem *titem, *tstack; |
445 |
|
|
int depth; |
446 |
|
|
|
447 |
teddy |
1.113 |
switch(val->type) { |
448 |
teddy |
1.112 |
case empty: |
449 |
masse |
1.136 |
if(fprintf(stream, "[]") < 0) |
450 |
teddy |
1.124 |
env->err= 5; |
451 |
teddy |
1.112 |
break; |
452 |
masse |
1.133 |
case unknown: |
453 |
masse |
1.136 |
if(fprintf(stream, "UNKNOWN") < 0) |
454 |
masse |
1.133 |
env->err= 5; |
455 |
|
|
break; |
456 |
teddy |
1.28 |
case integer: |
457 |
masse |
1.136 |
if(fprintf(stream, "%d", val->content.i) < 0) |
458 |
teddy |
1.124 |
env->err= 5; |
459 |
masse |
1.93 |
break; |
460 |
|
|
case tfloat: |
461 |
masse |
1.136 |
if(fprintf(stream, "%f", val->content.f) < 0) |
462 |
teddy |
1.124 |
env->err= 5; |
463 |
teddy |
1.2 |
break; |
464 |
|
|
case string: |
465 |
teddy |
1.124 |
if(noquote){ |
466 |
masse |
1.136 |
if(fprintf(stream, "%s", val->content.string) < 0) |
467 |
teddy |
1.124 |
env->err= 5; |
468 |
|
|
} else { /* quote */ |
469 |
masse |
1.136 |
if(fprintf(stream, "\"%s\"", val->content.string) < 0) |
470 |
teddy |
1.124 |
env->err= 5; |
471 |
|
|
} |
472 |
teddy |
1.2 |
break; |
473 |
teddy |
1.28 |
case symb: |
474 |
masse |
1.136 |
if(fprintf(stream, "%s", val->content.sym->id) < 0) |
475 |
teddy |
1.124 |
env->err= 5; |
476 |
masse |
1.6 |
break; |
477 |
teddy |
1.35 |
case func: |
478 |
masse |
1.136 |
if(fprintf(stream, "#<function %p>", val->content.func) < 0) |
479 |
teddy |
1.124 |
env->err= 5; |
480 |
|
|
break; |
481 |
|
|
case port: |
482 |
masse |
1.136 |
if(fprintf(stream, "#<port %p>", val->content.p) < 0) |
483 |
teddy |
1.124 |
env->err= 5; |
484 |
teddy |
1.35 |
break; |
485 |
masse |
1.102 |
case tcons: |
486 |
masse |
1.136 |
if(fprintf(stream, "[ ") < 0) { |
487 |
teddy |
1.124 |
env->err= 5; |
488 |
masse |
1.136 |
return printerr(env); |
489 |
teddy |
1.124 |
} |
490 |
teddy |
1.117 |
tstack= stack; |
491 |
masse |
1.132 |
|
492 |
teddy |
1.113 |
do { |
493 |
teddy |
1.117 |
titem=malloc(sizeof(stackitem)); |
494 |
teddy |
1.118 |
assert(titem != NULL); |
495 |
teddy |
1.117 |
titem->item=val; |
496 |
|
|
titem->next=tstack; |
497 |
|
|
tstack=titem; /* Put it on the stack */ |
498 |
|
|
/* Search a stack of values being printed to see if we are already |
499 |
|
|
printing this value */ |
500 |
|
|
titem=tstack; |
501 |
|
|
depth=0; |
502 |
masse |
1.132 |
|
503 |
teddy |
1.117 |
while(titem != NULL && titem->item != CAR(val)){ |
504 |
|
|
titem=titem->next; |
505 |
|
|
depth++; |
506 |
|
|
} |
507 |
masse |
1.132 |
|
508 |
teddy |
1.117 |
if(titem != NULL){ /* If we found it on the stack, */ |
509 |
teddy |
1.124 |
if(fprintf(stream, "#%d#", depth) < 0){ /* print a depth reference */ |
510 |
|
|
env->err= 5; |
511 |
|
|
free(titem); |
512 |
masse |
1.136 |
return printerr(env); |
513 |
teddy |
1.124 |
} |
514 |
teddy |
1.117 |
} else { |
515 |
teddy |
1.124 |
print_val(env, CAR(val), noquote, tstack, stream); |
516 |
teddy |
1.117 |
} |
517 |
masse |
1.132 |
|
518 |
teddy |
1.114 |
val= CDR(val); |
519 |
|
|
switch(val->type){ |
520 |
teddy |
1.112 |
case empty: |
521 |
|
|
break; |
522 |
|
|
case tcons: |
523 |
teddy |
1.117 |
/* Search a stack of values being printed to see if we are already |
524 |
|
|
printing this value */ |
525 |
|
|
titem=tstack; |
526 |
|
|
depth=0; |
527 |
masse |
1.132 |
|
528 |
teddy |
1.117 |
while(titem != NULL && titem->item != val){ |
529 |
|
|
titem=titem->next; |
530 |
|
|
depth++; |
531 |
|
|
} |
532 |
|
|
if(titem != NULL){ /* If we found it on the stack, */ |
533 |
teddy |
1.124 |
if(fprintf(stream, " . #%d#", depth) < 0){ /* print a depth reference */ |
534 |
|
|
env->err= 5; |
535 |
masse |
1.136 |
printerr(env); |
536 |
teddy |
1.124 |
goto printval_end; |
537 |
|
|
} |
538 |
teddy |
1.117 |
} else { |
539 |
teddy |
1.124 |
if(fprintf(stream, " ") < 0){ |
540 |
|
|
env->err= 5; |
541 |
masse |
1.136 |
printerr(env); |
542 |
teddy |
1.124 |
goto printval_end; |
543 |
|
|
} |
544 |
teddy |
1.117 |
} |
545 |
teddy |
1.112 |
break; |
546 |
|
|
default: |
547 |
teddy |
1.124 |
if(fprintf(stream, " . ") < 0){ /* Improper list */ |
548 |
|
|
env->err= 5; |
549 |
masse |
1.136 |
printerr(env); |
550 |
teddy |
1.124 |
goto printval_end; |
551 |
|
|
} |
552 |
|
|
print_val(env, val, noquote, tstack, stream); |
553 |
teddy |
1.112 |
} |
554 |
teddy |
1.117 |
} while(val->type == tcons && titem == NULL); |
555 |
teddy |
1.124 |
|
556 |
|
|
printval_end: |
557 |
|
|
|
558 |
teddy |
1.117 |
titem=tstack; |
559 |
|
|
while(titem != stack){ |
560 |
|
|
tstack=titem->next; |
561 |
|
|
free(titem); |
562 |
|
|
titem=tstack; |
563 |
|
|
} |
564 |
teddy |
1.124 |
|
565 |
|
|
if(! (env->err)){ |
566 |
|
|
if(fprintf(stream, " ]") < 0){ |
567 |
|
|
env->err= 5; |
568 |
|
|
} |
569 |
|
|
} |
570 |
teddy |
1.35 |
break; |
571 |
teddy |
1.2 |
} |
572 |
masse |
1.136 |
|
573 |
|
|
if(env->err) |
574 |
|
|
return printerr(env); |
575 |
masse |
1.1 |
} |
576 |
|
|
|
577 |
masse |
1.132 |
|
578 |
masse |
1.26 |
/* Swap the two top elements on the stack. */ |
579 |
teddy |
1.28 |
extern void swap(environment *env) |
580 |
masse |
1.26 |
{ |
581 |
masse |
1.104 |
value *temp= env->head; |
582 |
masse |
1.134 |
|
583 |
masse |
1.136 |
if(check_args(env, 2, unknown, unknown)) |
584 |
masse |
1.135 |
return printerr(env); |
585 |
masse |
1.134 |
|
586 |
masse |
1.104 |
env->head= CDR(env->head); |
587 |
|
|
CDR(temp)= CDR(env->head); |
588 |
|
|
CDR(env->head)= temp; |
589 |
masse |
1.26 |
} |
590 |
|
|
|
591 |
masse |
1.132 |
|
592 |
teddy |
1.33 |
/* Recall a value from a symbol, if bound */ |
593 |
teddy |
1.31 |
extern void rcl(environment *env) |
594 |
|
|
{ |
595 |
|
|
value *val; |
596 |
|
|
|
597 |
masse |
1.136 |
if(check_args(env, 1, symb)) |
598 |
masse |
1.135 |
return printerr(env); |
599 |
teddy |
1.35 |
|
600 |
masse |
1.105 |
val= CAR(env->head)->content.sym->val; |
601 |
teddy |
1.33 |
if(val == NULL){ |
602 |
masse |
1.102 |
env->err= 3; |
603 |
masse |
1.135 |
return printerr(env); |
604 |
teddy |
1.33 |
} |
605 |
masse |
1.135 |
|
606 |
teddy |
1.110 |
push_val(env, val); /* Return the symbol's bound value */ |
607 |
|
|
swap(env); |
608 |
|
|
if(env->err) return; |
609 |
masse |
1.132 |
env->head= CDR(env->head); |
610 |
teddy |
1.31 |
} |
611 |
masse |
1.26 |
|
612 |
masse |
1.126 |
|
613 |
teddy |
1.29 |
/* If the top element is a symbol, determine if it's bound to a |
614 |
|
|
function value, and if it is, toss the symbol and execute the |
615 |
|
|
function. */ |
616 |
teddy |
1.28 |
extern void eval(environment *env) |
617 |
masse |
1.1 |
{ |
618 |
|
|
funcp in_func; |
619 |
masse |
1.44 |
value* temp_val; |
620 |
masse |
1.104 |
value* iterator; |
621 |
masse |
1.44 |
|
622 |
teddy |
1.80 |
eval_start: |
623 |
|
|
|
624 |
teddy |
1.96 |
gc_maybe(env); |
625 |
|
|
|
626 |
masse |
1.136 |
if(check_args(env, 1, unknown)) |
627 |
masse |
1.135 |
return printerr(env); |
628 |
masse |
1.1 |
|
629 |
masse |
1.104 |
switch(CAR(env->head)->type) { |
630 |
masse |
1.46 |
/* if it's a symbol */ |
631 |
|
|
case symb: |
632 |
masse |
1.133 |
env->errsymb= CAR(env->head)->content.sym->id; |
633 |
teddy |
1.35 |
rcl(env); /* get its contents */ |
634 |
|
|
if(env->err) return; |
635 |
masse |
1.104 |
if(CAR(env->head)->type!=symb){ /* don't recurse symbols */ |
636 |
teddy |
1.64 |
goto eval_start; |
637 |
teddy |
1.29 |
} |
638 |
teddy |
1.59 |
return; |
639 |
masse |
1.22 |
|
640 |
masse |
1.46 |
/* If it's a lone function value, run it */ |
641 |
|
|
case func: |
642 |
masse |
1.128 |
in_func= CAR(env->head)->content.func; |
643 |
masse |
1.132 |
env->head= CDR(env->head); |
644 |
masse |
1.135 |
return in_func((void*)env); |
645 |
masse |
1.44 |
|
646 |
masse |
1.46 |
/* If it's a list */ |
647 |
masse |
1.102 |
case tcons: |
648 |
masse |
1.104 |
temp_val= CAR(env->head); |
649 |
masse |
1.98 |
protect(temp_val); |
650 |
masse |
1.93 |
|
651 |
masse |
1.132 |
env->head= CDR(env->head); |
652 |
masse |
1.104 |
iterator= temp_val; |
653 |
masse |
1.90 |
|
654 |
teddy |
1.111 |
while(iterator->type != empty) { |
655 |
masse |
1.104 |
push_val(env, CAR(iterator)); |
656 |
masse |
1.90 |
|
657 |
masse |
1.132 |
if(CAR(env->head)->type==symb |
658 |
masse |
1.105 |
&& CAR(env->head)->content.sym->id[0]==';') { |
659 |
masse |
1.132 |
env->head= CDR(env->head); |
660 |
masse |
1.90 |
|
661 |
teddy |
1.111 |
if(CDR(iterator)->type == empty){ |
662 |
teddy |
1.64 |
goto eval_start; |
663 |
teddy |
1.59 |
} |
664 |
masse |
1.44 |
eval(env); |
665 |
masse |
1.46 |
if(env->err) return; |
666 |
masse |
1.44 |
} |
667 |
teddy |
1.111 |
if (CDR(iterator)->type == empty || CDR(iterator)->type == tcons) |
668 |
masse |
1.104 |
iterator= CDR(iterator); |
669 |
teddy |
1.103 |
else { |
670 |
masse |
1.135 |
env->err= 2; /* Improper list */ |
671 |
|
|
return printerr(env); |
672 |
teddy |
1.103 |
} |
673 |
masse |
1.44 |
} |
674 |
masse |
1.98 |
unprotect(temp_val); |
675 |
teddy |
1.59 |
return; |
676 |
masse |
1.46 |
|
677 |
teddy |
1.116 |
case empty: |
678 |
masse |
1.132 |
env->head= CDR(env->head); |
679 |
teddy |
1.116 |
case integer: |
680 |
|
|
case tfloat: |
681 |
|
|
case string: |
682 |
teddy |
1.124 |
case port: |
683 |
masse |
1.133 |
case unknown: |
684 |
teddy |
1.59 |
return; |
685 |
masse |
1.26 |
} |
686 |
masse |
1.1 |
} |
687 |
|
|
|
688 |
teddy |
1.40 |
|
689 |
masse |
1.126 |
/* Internal forget function */ |
690 |
|
|
void forget_sym(symbol **hash_entry) |
691 |
masse |
1.19 |
{ |
692 |
masse |
1.126 |
symbol *temp; |
693 |
teddy |
1.111 |
|
694 |
masse |
1.126 |
temp= *hash_entry; |
695 |
|
|
*hash_entry= (*hash_entry)->next; |
696 |
|
|
|
697 |
|
|
free(temp->id); |
698 |
|
|
free(temp); |
699 |
|
|
} |
700 |
masse |
1.93 |
|
701 |
masse |
1.65 |
|
702 |
masse |
1.126 |
int main(int argc, char **argv) |
703 |
masse |
1.95 |
{ |
704 |
masse |
1.126 |
environment myenv; |
705 |
|
|
int c; /* getopt option character */ |
706 |
masse |
1.89 |
|
707 |
masse |
1.126 |
#ifdef __linux__ |
708 |
|
|
mtrace(); |
709 |
|
|
#endif |
710 |
masse |
1.89 |
|
711 |
masse |
1.126 |
init_env(&myenv); |
712 |
masse |
1.89 |
|
713 |
masse |
1.126 |
myenv.interactive = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO); |
714 |
masse |
1.89 |
|
715 |
masse |
1.126 |
while ((c = getopt (argc, argv, "i")) != -1) |
716 |
|
|
switch (c) |
717 |
|
|
{ |
718 |
|
|
case 'i': |
719 |
|
|
myenv.interactive = 1; |
720 |
|
|
break; |
721 |
|
|
case '?': |
722 |
|
|
fprintf (stderr, |
723 |
|
|
"Unknown option character '\\x%x'.\n", |
724 |
|
|
optopt); |
725 |
|
|
return EX_USAGE; |
726 |
|
|
default: |
727 |
|
|
abort (); |
728 |
|
|
} |
729 |
|
|
|
730 |
|
|
if (optind < argc) { |
731 |
|
|
myenv.interactive = 0; |
732 |
|
|
myenv.inputstream= fopen(argv[optind], "r"); |
733 |
|
|
if(myenv.inputstream== NULL) { |
734 |
|
|
perror(argv[0]); |
735 |
|
|
exit (EX_NOINPUT); |
736 |
masse |
1.89 |
} |
737 |
|
|
} |
738 |
|
|
|
739 |
masse |
1.132 |
if(myenv.interactive) |
740 |
masse |
1.134 |
puts(start_message); |
741 |
masse |
1.65 |
|
742 |
masse |
1.126 |
while(1) { |
743 |
|
|
if(myenv.in_string==NULL) { |
744 |
|
|
if (myenv.interactive) { |
745 |
|
|
if(myenv.err) { |
746 |
|
|
printf("(error %d)\n", myenv.err); |
747 |
|
|
myenv.err= 0; |
748 |
|
|
} |
749 |
|
|
printf("\n"); |
750 |
|
|
printstack(&myenv); |
751 |
|
|
printf("> "); |
752 |
|
|
} |
753 |
|
|
myenv.err=0; |
754 |
|
|
} |
755 |
|
|
readstream(&myenv, myenv.inputstream); |
756 |
|
|
if (myenv.err) { /* EOF or other error */ |
757 |
|
|
myenv.err=0; |
758 |
|
|
quit(&myenv); |
759 |
|
|
} else if(myenv.head->type!=empty |
760 |
|
|
&& CAR(myenv.head)->type==symb |
761 |
|
|
&& CAR(myenv.head)->content.sym->id[0] == ';') { |
762 |
masse |
1.132 |
if(myenv.head->type != empty) |
763 |
|
|
myenv.head= CDR(myenv.head); |
764 |
masse |
1.126 |
eval(&myenv); |
765 |
teddy |
1.103 |
} else { |
766 |
masse |
1.126 |
gc_maybe(&myenv); |
767 |
teddy |
1.103 |
} |
768 |
masse |
1.65 |
} |
769 |
masse |
1.126 |
quit(&myenv); |
770 |
|
|
return EXIT_FAILURE; |
771 |
masse |
1.65 |
} |
772 |
masse |
1.66 |
|
773 |
masse |
1.132 |
|
774 |
masse |
1.126 |
/* Return copy of a value */ |
775 |
|
|
value *copy_val(environment *env, value *old_value) |
776 |
masse |
1.95 |
{ |
777 |
masse |
1.126 |
value *new_value; |
778 |
masse |
1.121 |
|
779 |
masse |
1.126 |
if(old_value==NULL) |
780 |
|
|
return NULL; |
781 |
masse |
1.95 |
|
782 |
masse |
1.126 |
new_value= new_val(env); |
783 |
|
|
new_value->type= old_value->type; |
784 |
masse |
1.66 |
|
785 |
masse |
1.126 |
switch(old_value->type){ |
786 |
|
|
case tfloat: |
787 |
|
|
case integer: |
788 |
|
|
case func: |
789 |
|
|
case symb: |
790 |
|
|
case empty: |
791 |
masse |
1.133 |
case unknown: |
792 |
masse |
1.126 |
case port: |
793 |
|
|
new_value->content= old_value->content; |
794 |
|
|
break; |
795 |
|
|
case string: |
796 |
masse |
1.128 |
new_value->content.string= strdup(old_value->content.string); |
797 |
masse |
1.126 |
break; |
798 |
|
|
case tcons: |
799 |
masse |
1.66 |
|
800 |
masse |
1.126 |
new_value->content.c= malloc(sizeof(pair)); |
801 |
|
|
assert(new_value->content.c!=NULL); |
802 |
|
|
env->gc_count += sizeof(pair); |
803 |
masse |
1.66 |
|
804 |
masse |
1.126 |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
805 |
|
|
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
806 |
|
|
break; |
807 |
masse |
1.67 |
} |
808 |
masse |
1.66 |
|
809 |
masse |
1.126 |
return new_value; |
810 |
teddy |
1.124 |
} |
811 |
|
|
|
812 |
masse |
1.132 |
|
813 |
teddy |
1.124 |
/* read a line from a stream; used by readline */ |
814 |
|
|
void readlinestream(environment *env, FILE *stream) |
815 |
|
|
{ |
816 |
masse |
1.68 |
char in_string[101]; |
817 |
|
|
|
818 |
teddy |
1.124 |
if(fgets(in_string, 100, stream)==NULL) { |
819 |
teddy |
1.84 |
push_cstring(env, ""); |
820 |
teddy |
1.124 |
if (! feof(stream)){ |
821 |
|
|
env->err= 5; |
822 |
masse |
1.136 |
return printerr(env); |
823 |
teddy |
1.124 |
} |
824 |
|
|
} else { |
825 |
teddy |
1.84 |
push_cstring(env, in_string); |
826 |
teddy |
1.124 |
} |
827 |
masse |
1.68 |
} |
828 |
|
|
|
829 |
masse |
1.132 |
|
830 |
masse |
1.126 |
/* Reverse (flip) a list */ |
831 |
|
|
extern void rev(environment *env) |
832 |
masse |
1.95 |
{ |
833 |
masse |
1.126 |
value *old_head, *new_head, *item; |
834 |
teddy |
1.124 |
|
835 |
masse |
1.126 |
if(CAR(env->head)->type==empty) |
836 |
|
|
return; /* Don't reverse an empty list */ |
837 |
|
|
|
838 |
masse |
1.136 |
if(check_args(env, 1, tcons)) |
839 |
masse |
1.135 |
return printerr(env); |
840 |
teddy |
1.124 |
|
841 |
masse |
1.126 |
old_head= CAR(env->head); |
842 |
|
|
new_head= new_val(env); |
843 |
|
|
while(old_head->type != empty) { |
844 |
|
|
item= old_head; |
845 |
|
|
old_head= CDR(old_head); |
846 |
|
|
CDR(item)= new_head; |
847 |
|
|
new_head= item; |
848 |
|
|
} |
849 |
|
|
CAR(env->head)= new_head; |
850 |
|
|
} |
851 |
|
|
|
852 |
masse |
1.132 |
|
853 |
masse |
1.126 |
/* Make a list. */ |
854 |
|
|
extern void pack(environment *env) |
855 |
|
|
{ |
856 |
|
|
value *iterator, *temp, *ending; |
857 |
|
|
|
858 |
|
|
ending=new_val(env); |
859 |
|
|
|
860 |
|
|
iterator= env->head; |
861 |
|
|
if(iterator->type == empty |
862 |
|
|
|| (CAR(iterator)->type==symb |
863 |
|
|
&& CAR(iterator)->content.sym->id[0]=='[')) { |
864 |
|
|
temp= ending; |
865 |
masse |
1.132 |
if(env->head->type != empty) |
866 |
|
|
env->head= CDR(env->head); |
867 |
masse |
1.126 |
} else { |
868 |
|
|
/* Search for first delimiter */ |
869 |
|
|
while(CDR(iterator)->type != empty |
870 |
|
|
&& (CAR(CDR(iterator))->type!=symb |
871 |
|
|
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
872 |
|
|
iterator= CDR(iterator); |
873 |
|
|
|
874 |
|
|
/* Extract list */ |
875 |
|
|
temp= env->head; |
876 |
|
|
env->head= CDR(iterator); |
877 |
|
|
CDR(iterator)= ending; |
878 |
|
|
|
879 |
|
|
if(env->head->type != empty) |
880 |
masse |
1.132 |
env->head= CDR(env->head); |
881 |
masse |
1.126 |
} |
882 |
|
|
|
883 |
|
|
/* Push list */ |
884 |
teddy |
1.124 |
|
885 |
masse |
1.126 |
push_val(env, temp); |
886 |
|
|
rev(env); |
887 |
teddy |
1.124 |
} |
888 |
|
|
|
889 |
masse |
1.132 |
|
890 |
teddy |
1.124 |
/* read from a stream; used by "read" and "readport" */ |
891 |
|
|
void readstream(environment *env, FILE *stream) |
892 |
|
|
{ |
893 |
teddy |
1.78 |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
894 |
|
|
const char strform[]= "\"%[^\"]\"%n"; |
895 |
|
|
const char intform[]= "%i%n"; |
896 |
masse |
1.93 |
const char fltform[]= "%f%n"; |
897 |
teddy |
1.78 |
const char blankform[]= "%*[ \t]%n"; |
898 |
masse |
1.90 |
const char ebrackform[]= "]%n"; |
899 |
|
|
const char semicform[]= ";%n"; |
900 |
|
|
const char bbrackform[]= "[%n"; |
901 |
masse |
1.68 |
|
902 |
teddy |
1.78 |
int itemp, readlength= -1; |
903 |
masse |
1.93 |
int count= -1; |
904 |
|
|
float ftemp; |
905 |
masse |
1.68 |
static int depth= 0; |
906 |
teddy |
1.116 |
char *match; |
907 |
masse |
1.68 |
size_t inlength; |
908 |
|
|
|
909 |
masse |
1.70 |
if(env->in_string==NULL) { |
910 |
teddy |
1.84 |
if(depth > 0 && env->interactive) { |
911 |
teddy |
1.80 |
printf("]> "); |
912 |
|
|
} |
913 |
masse |
1.126 |
readlinestream(env, env->inputstream); |
914 |
|
|
if(env->err) return; |
915 |
teddy |
1.84 |
|
916 |
masse |
1.128 |
if((CAR(env->head)->content.string)[0]=='\0'){ |
917 |
teddy |
1.85 |
env->err= 4; /* "" means EOF */ |
918 |
teddy |
1.84 |
return; |
919 |
|
|
} |
920 |
masse |
1.68 |
|
921 |
masse |
1.128 |
env->in_string= malloc(strlen(CAR(env->head)->content.string)+1); |
922 |
teddy |
1.118 |
assert(env->in_string != NULL); |
923 |
teddy |
1.78 |
env->free_string= env->in_string; /* Save the original pointer */ |
924 |
masse |
1.128 |
strcpy(env->in_string, CAR(env->head)->content.string); |
925 |
masse |
1.132 |
env->head= CDR(env->head); |
926 |
masse |
1.68 |
} |
927 |
|
|
|
928 |
masse |
1.70 |
inlength= strlen(env->in_string)+1; |
929 |
masse |
1.68 |
match= malloc(inlength); |
930 |
teddy |
1.118 |
assert(match != NULL); |
931 |
masse |
1.68 |
|
932 |
masse |
1.93 |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
933 |
teddy |
1.78 |
&& readlength != -1) { |
934 |
masse |
1.71 |
; |
935 |
masse |
1.93 |
} else if(sscanf(env->in_string, fltform, &ftemp, &readlength) != EOF |
936 |
teddy |
1.78 |
&& readlength != -1) { |
937 |
masse |
1.93 |
if(sscanf(env->in_string, intform, &itemp, &count) != EOF |
938 |
|
|
&& count==readlength) { |
939 |
|
|
push_int(env, itemp); |
940 |
|
|
} else { |
941 |
|
|
push_float(env, ftemp); |
942 |
|
|
} |
943 |
teddy |
1.114 |
} else if(sscanf(env->in_string, "\"\"%n", &readlength) != EOF |
944 |
|
|
&& readlength != -1) { |
945 |
|
|
push_cstring(env, ""); |
946 |
teddy |
1.78 |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
947 |
|
|
&& readlength != -1) { |
948 |
masse |
1.72 |
push_cstring(env, match); |
949 |
teddy |
1.78 |
} else if(sscanf(env->in_string, symbform, match, &readlength) != EOF |
950 |
|
|
&& readlength != -1) { |
951 |
masse |
1.68 |
push_sym(env, match); |
952 |
teddy |
1.78 |
} else if(sscanf(env->in_string, ebrackform, &readlength) != EOF |
953 |
|
|
&& readlength != -1) { |
954 |
masse |
1.68 |
pack(env); if(env->err) return; |
955 |
teddy |
1.78 |
if(depth != 0) depth--; |
956 |
|
|
} else if(sscanf(env->in_string, semicform, &readlength) != EOF |
957 |
|
|
&& readlength != -1) { |
958 |
masse |
1.68 |
push_sym(env, ";"); |
959 |
teddy |
1.78 |
} else if(sscanf(env->in_string, bbrackform, &readlength) != EOF |
960 |
|
|
&& readlength != -1) { |
961 |
masse |
1.68 |
push_sym(env, "["); |
962 |
|
|
depth++; |
963 |
|
|
} else { |
964 |
teddy |
1.78 |
free(env->free_string); |
965 |
|
|
env->in_string = env->free_string = NULL; |
966 |
|
|
} |
967 |
masse |
1.126 |
if (env->in_string != NULL) { |
968 |
|
|
env->in_string += readlength; |
969 |
teddy |
1.91 |
} |
970 |
|
|
|
971 |
masse |
1.126 |
free(match); |
972 |
teddy |
1.91 |
|
973 |
masse |
1.126 |
if(depth) |
974 |
|
|
return readstream(env, env->inputstream); |
975 |
masse |
1.133 |
} |
976 |
|
|
|
977 |
|
|
|
978 |
masse |
1.136 |
int check_args(environment *env, int num_args, ...) |
979 |
masse |
1.133 |
{ |
980 |
|
|
va_list ap; |
981 |
|
|
enum type_enum mytype; |
982 |
masse |
1.136 |
int i; |
983 |
masse |
1.133 |
|
984 |
|
|
value *iter= env->head; |
985 |
|
|
int errval= 0; |
986 |
|
|
|
987 |
masse |
1.136 |
va_start(ap, num_args); |
988 |
|
|
for(i=1; i<=num_args; i++) { |
989 |
masse |
1.133 |
mytype= va_arg(ap, enum type_enum); |
990 |
|
|
// fprintf(stderr, "%s\n", env->errsymb); |
991 |
|
|
|
992 |
|
|
if(iter->type==empty || iter==NULL) { |
993 |
|
|
errval= 1; |
994 |
|
|
break; |
995 |
|
|
} |
996 |
|
|
|
997 |
masse |
1.136 |
if(mytype!=unknown && CAR(iter)->type!=mytype) { |
998 |
masse |
1.133 |
errval= 2; |
999 |
|
|
break; |
1000 |
|
|
} |
1001 |
|
|
|
1002 |
|
|
iter= CDR(iter); |
1003 |
|
|
} |
1004 |
|
|
|
1005 |
|
|
va_end(ap); |
1006 |
|
|
|
1007 |
|
|
env->err= errval; |
1008 |
|
|
return errval; |
1009 |
masse |
1.95 |
} |