1 |
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/* -*- coding: utf-8; -*- */ |
2 |
/* |
/* |
3 |
stack - an interactive interpreter for a stack-based language |
stack - an interactive interpreter for a stack-based language |
4 |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn |
21 |
Teddy Hogeborn <teddy@fukt.bth.se> |
Teddy Hogeborn <teddy@fukt.bth.se> |
22 |
*/ |
*/ |
23 |
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#define CAR(X) X->content.c->car |
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#define CDR(X) X->content.c->cdr |
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/* printf, sscanf, fgets, fprintf, fopen, perror */ |
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#include <stdio.h> |
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/* exit, EXIT_SUCCESS, malloc, free */ |
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#include <stdlib.h> |
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/* NULL */ |
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#include <stddef.h> |
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/* dlopen, dlsym, dlerror */ |
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#include <dlfcn.h> |
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/* strcmp, strcpy, strlen, strcat, strdup */ |
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#include <string.h> |
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/* getopt, STDIN_FILENO, STDOUT_FILENO, usleep */ |
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#include <unistd.h> |
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/* EX_NOINPUT, EX_USAGE */ |
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#include <sysexits.h> |
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/* mtrace, muntrace */ |
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#include <mcheck.h> |
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/* ioctl */ |
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#include <sys/ioctl.h> |
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/* KDMKTONE */ |
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#include <linux/kd.h> |
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24 |
#include "stack.h" |
#include "stack.h" |
25 |
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26 |
/* Initialize a newly created environment */ |
/* Initialize a newly created environment */ |
32 |
env->gc_count= 0; |
env->gc_count= 0; |
33 |
env->gc_ref= NULL; |
env->gc_ref= NULL; |
34 |
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35 |
env->head= NULL; |
env->head= new_val(env); |
36 |
for(i= 0; i<HASHTBLSIZE; i++) |
for(i= 0; i<HASHTBLSIZE; i++) |
37 |
env->symbols[i]= NULL; |
env->symbols[i]= NULL; |
38 |
env->err= 0; |
env->err= 0; |
47 |
fprintf(stderr, "Err: %s\n", in_string); |
fprintf(stderr, "Err: %s\n", in_string); |
48 |
} |
} |
49 |
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/* Discard the top element of the stack. */ |
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extern void toss(environment *env) |
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{ |
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if(env->head==NULL) { |
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printerr("Too Few Arguments"); |
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env->err= 1; |
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return; |
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} |
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env->head= CDR(env->head); /* Remove the top stack item */ |
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} |
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50 |
/* Returns a pointer to a pointer to an element in the hash table. */ |
/* Returns a pointer to a pointer to an element in the hash table. */ |
51 |
symbol **hash(hashtbl in_hashtbl, const char *in_string) |
symbol **hash(hashtbl in_hashtbl, const char *in_string) |
52 |
{ |
{ |
82 |
value *nval= malloc(sizeof(value)); |
value *nval= malloc(sizeof(value)); |
83 |
stackitem *nitem= malloc(sizeof(stackitem)); |
stackitem *nitem= malloc(sizeof(stackitem)); |
84 |
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85 |
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assert(nval != NULL); |
86 |
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assert(nitem != NULL); |
87 |
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88 |
nval->content.ptr= NULL; |
nval->content.ptr= NULL; |
89 |
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nval->type= empty; |
90 |
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91 |
nitem->item= nval; |
nitem->item= nval; |
92 |
nitem->next= env->gc_ref; |
nitem->next= env->gc_ref; |
100 |
return nval; |
return nval; |
101 |
} |
} |
102 |
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103 |
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104 |
/* Mark values recursively. |
/* Mark values recursively. |
105 |
Marked values are not collected by the GC. */ |
Marked values are not collected by the GC. */ |
106 |
inline void gc_mark(value *val) |
inline void gc_mark(value *val) |
116 |
} |
} |
117 |
} |
} |
118 |
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inline void gc_maybe(environment *env) |
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{ |
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if(env->gc_count < env->gc_limit) |
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return; |
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else |
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return gc_init(env); |
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} |
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119 |
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120 |
/* Start GC */ |
/* Start GC */ |
121 |
extern void gc_init(environment *env) |
extern void gc_init(environment *env) |
122 |
{ |
{ |
123 |
stackitem *new_head= NULL, *titem; |
stackitem *new_head= NULL, *titem; |
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cons *iterator; |
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124 |
symbol *tsymb; |
symbol *tsymb; |
125 |
int i; |
int i; |
126 |
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144 |
if(env->interactive) |
if(env->interactive) |
145 |
printf("."); |
printf("."); |
146 |
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147 |
env->gc_count= 0; |
env->gc_count= 0; |
148 |
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149 |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
150 |
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151 |
if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
152 |
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153 |
if(env->gc_ref->item->type==string) /* Remove content */ |
/* Remove content */ |
154 |
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switch(env->gc_ref->item->type){ |
155 |
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case string: |
156 |
free(env->gc_ref->item->content.ptr); |
free(env->gc_ref->item->content.ptr); |
157 |
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break; |
158 |
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case tcons: |
159 |
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free(env->gc_ref->item->content.c); |
160 |
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break; |
161 |
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case port: |
162 |
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case empty: |
163 |
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case integer: |
164 |
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case tfloat: |
165 |
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case func: |
166 |
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case symb: |
167 |
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/* Symbol strings are freed when walking the hash table */ |
168 |
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break; |
169 |
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} |
170 |
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171 |
free(env->gc_ref->item); /* Remove from gc_ref */ |
free(env->gc_ref->item); /* Remove from gc_ref */ |
172 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
173 |
free(env->gc_ref); /* Remove value */ |
free(env->gc_ref); /* Remove value */ |
174 |
env->gc_ref= titem; |
env->gc_ref= titem; |
175 |
continue; |
continue; |
176 |
} |
} |
177 |
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#ifdef DEBUG |
178 |
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printf("Kept value (%p)", env->gc_ref->item); |
179 |
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if(env->gc_ref->item->gc.flag.mark) |
180 |
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printf(" (marked)"); |
181 |
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if(env->gc_ref->item->gc.flag.protect) |
182 |
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printf(" (protected)"); |
183 |
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switch(env->gc_ref->item->type){ |
184 |
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case integer: |
185 |
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printf(" integer: %d", env->gc_ref->item->content.i); |
186 |
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break; |
187 |
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case func: |
188 |
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printf(" func: %p", env->gc_ref->item->content.ptr); |
189 |
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break; |
190 |
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case symb: |
191 |
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printf(" symb: %s", env->gc_ref->item->content.sym->id); |
192 |
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break; |
193 |
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case tcons: |
194 |
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printf(" tcons: %p\t%p", CAR(env->gc_ref->item), |
195 |
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CDR(env->gc_ref->item)); |
196 |
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break; |
197 |
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default: |
198 |
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printf(" <unknown %d>", (env->gc_ref->item->type)); |
199 |
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} |
200 |
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printf("\n"); |
201 |
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#endif /* DEBUG */ |
202 |
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203 |
/* Keep values */ |
/* Keep values */ |
204 |
env->gc_count += sizeof(value); |
env->gc_count += sizeof(value); |
205 |
if(env->gc_ref->item->type==string) |
if(env->gc_ref->item->type==string) |
206 |
env->gc_count += strlen(env->gc_ref->item->content.ptr); |
env->gc_count += strlen(env->gc_ref->item->content.ptr)+1; |
207 |
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208 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
209 |
env->gc_ref->next= new_head; |
env->gc_ref->next= new_head; |
218 |
env->gc_ref= new_head; |
env->gc_ref= new_head; |
219 |
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220 |
if(env->interactive) |
if(env->interactive) |
221 |
printf("done\n"); |
printf("done (%d bytes still allocated)\n", env->gc_count); |
222 |
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223 |
} |
} |
224 |
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225 |
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inline void gc_maybe(environment *env) |
226 |
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{ |
227 |
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if(env->gc_count < env->gc_limit) |
228 |
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return; |
229 |
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else |
230 |
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return gc_init(env); |
231 |
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} |
232 |
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233 |
/* Protect values from GC */ |
/* Protect values from GC */ |
234 |
void protect(value *val) |
void protect(value *val) |
235 |
{ |
{ |
263 |
{ |
{ |
264 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
265 |
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266 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
267 |
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assert(new_value->content.c!=NULL); |
268 |
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env->gc_count += sizeof(pair); |
269 |
new_value->type= tcons; |
new_value->type= tcons; |
270 |
CAR(new_value)= val; |
CAR(new_value)= val; |
271 |
CDR(new_value)= env->head; |
CDR(new_value)= env->head; |
301 |
int length= strlen(in_string)+1; |
int length= strlen(in_string)+1; |
302 |
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303 |
new_value->content.ptr= malloc(length); |
new_value->content.ptr= malloc(length); |
304 |
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assert(new_value != NULL); |
305 |
env->gc_count += length; |
env->gc_count += length; |
306 |
strcpy(new_value->content.ptr, in_string); |
strcpy(new_value->content.ptr, in_string); |
307 |
new_value->type= string; |
new_value->type= string; |
316 |
char *new_string, *current; |
char *new_string, *current; |
317 |
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318 |
new_string= malloc((strlen(old_string)*2)+4); |
new_string= malloc((strlen(old_string)*2)+4); |
319 |
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assert(new_string != NULL); |
320 |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
321 |
current= new_string+3; |
current= new_string+3; |
322 |
while(old_string[0] != '\0'){ |
while(old_string[0] != '\0'){ |
334 |
{ |
{ |
335 |
char *new_string; |
char *new_string; |
336 |
|
|
337 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
338 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
339 |
env->err= 1; |
env->err= 1; |
340 |
return; |
return; |
386 |
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|
387 |
/* Create a new symbol */ |
/* Create a new symbol */ |
388 |
(*new_symbol)= malloc(sizeof(symbol)); |
(*new_symbol)= malloc(sizeof(symbol)); |
389 |
|
assert((*new_symbol) != NULL); |
390 |
(*new_symbol)->val= NULL; /* undefined value */ |
(*new_symbol)->val= NULL; /* undefined value */ |
391 |
(*new_symbol)->next= NULL; |
(*new_symbol)->next= NULL; |
392 |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
393 |
|
assert((*new_symbol)->id != NULL); |
394 |
strcpy((*new_symbol)->id, in_string); |
strcpy((*new_symbol)->id, in_string); |
395 |
|
|
396 |
/* Intern the new symbol in the hash table */ |
/* Intern the new symbol in the hash table */ |
424 |
unprotect(new_value); unprotect(new_fvalue); |
unprotect(new_value); unprotect(new_fvalue); |
425 |
} |
} |
426 |
|
|
427 |
/* Print newline. */ |
/* Print a value */ |
428 |
extern void nl() |
void print_val(environment *env, value *val, int noquote, stackitem *stack, FILE *stream) |
429 |
{ |
{ |
430 |
printf("\n"); |
stackitem *titem, *tstack; |
431 |
} |
int depth; |
432 |
|
|
433 |
/* Gets the type of a value */ |
switch(val->type) { |
434 |
extern void type(environment *env) |
case empty: |
435 |
{ |
if(fprintf(stream, "[]") < 0){ |
436 |
int typenum; |
perror("print_val"); |
437 |
|
env->err= 5; |
438 |
if(env->head==NULL) { |
return; |
439 |
printerr("Too Few Arguments"); |
} |
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
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typenum= CAR(env->head)->type; |
|
|
toss(env); |
|
|
switch(typenum){ |
|
|
case integer: |
|
|
push_sym(env, "integer"); |
|
|
break; |
|
|
case tfloat: |
|
|
push_sym(env, "float"); |
|
|
break; |
|
|
case string: |
|
|
push_sym(env, "string"); |
|
|
break; |
|
|
case symb: |
|
|
push_sym(env, "symbol"); |
|
|
break; |
|
|
case func: |
|
|
push_sym(env, "function"); |
|
|
break; |
|
|
case tcons: |
|
|
push_sym(env, "list"); |
|
440 |
break; |
break; |
|
} |
|
|
} |
|
|
|
|
|
/* Prints the top element of the stack. */ |
|
|
void print_h(value *stack_head, int noquote) |
|
|
{ |
|
|
switch(CAR(stack_head)->type) { |
|
441 |
case integer: |
case integer: |
442 |
printf("%d", CAR(stack_head)->content.i); |
if(fprintf(stream, "%d", val->content.i) < 0){ |
443 |
|
perror("print_val"); |
444 |
|
env->err= 5; |
445 |
|
return; |
446 |
|
} |
447 |
break; |
break; |
448 |
case tfloat: |
case tfloat: |
449 |
printf("%f", CAR(stack_head)->content.f); |
if(fprintf(stream, "%f", val->content.f) < 0){ |
450 |
|
perror("print_val"); |
451 |
|
env->err= 5; |
452 |
|
return; |
453 |
|
} |
454 |
break; |
break; |
455 |
case string: |
case string: |
456 |
if(noquote) |
if(noquote){ |
457 |
printf("%s", (char*)CAR(stack_head)->content.ptr); |
if(fprintf(stream, "%s", (char*)(val->content.ptr)) < 0){ |
458 |
else |
perror("print_val"); |
459 |
printf("\"%s\"", (char*)CAR(stack_head)->content.ptr); |
env->err= 5; |
460 |
|
return; |
461 |
|
} |
462 |
|
} else { /* quote */ |
463 |
|
if(fprintf(stream, "\"%s\"", (char*)(val->content.ptr)) < 0){ |
464 |
|
perror("print_val"); |
465 |
|
env->err= 5; |
466 |
|
return; |
467 |
|
} |
468 |
|
} |
469 |
break; |
break; |
470 |
case symb: |
case symb: |
471 |
printf("%s", ((symbol *)(CAR(stack_head)->content.ptr))->id); |
if(fprintf(stream, "%s", val->content.sym->id) < 0){ |
472 |
|
perror("print_val"); |
473 |
|
env->err= 5; |
474 |
|
return; |
475 |
|
} |
476 |
break; |
break; |
477 |
case func: |
case func: |
478 |
printf("#<function %p>", (funcp)(CAR(stack_head)->content.ptr)); |
if(fprintf(stream, "#<function %p>", (funcp)(val->content.ptr)) < 0){ |
479 |
|
perror("print_val"); |
480 |
|
env->err= 5; |
481 |
|
return; |
482 |
|
} |
483 |
break; |
break; |
484 |
case tcons: |
case port: |
485 |
/* A list is just a stack, so make stack_head point to it */ |
if(fprintf(stream, "#<port %p>", (funcp)(val->content.p)) < 0){ |
486 |
stack_head= CAR(stack_head); |
perror("print_val"); |
487 |
printf("[ "); |
env->err= 5; |
488 |
while(stack_head != NULL) { |
return; |
|
print_h(stack_head, noquote); |
|
|
printf(" "); |
|
|
stack_head= CDR(stack_head); |
|
489 |
} |
} |
|
printf("]"); |
|
490 |
break; |
break; |
491 |
} |
case tcons: |
492 |
} |
if(fprintf(stream, "[ ") < 0){ |
493 |
|
perror("print_val"); |
494 |
extern void print_(environment *env) |
env->err= 5; |
495 |
{ |
return; |
496 |
if(env->head==NULL) { |
} |
497 |
printerr("Too Few Arguments"); |
tstack= stack; |
498 |
env->err= 1; |
do { |
499 |
return; |
titem=malloc(sizeof(stackitem)); |
500 |
} |
assert(titem != NULL); |
501 |
print_h(env->head, 0); |
titem->item=val; |
502 |
nl(); |
titem->next=tstack; |
503 |
} |
tstack=titem; /* Put it on the stack */ |
504 |
|
/* Search a stack of values being printed to see if we are already |
505 |
/* Prints the top element of the stack and then discards it. */ |
printing this value */ |
506 |
extern void print(environment *env) |
titem=tstack; |
507 |
{ |
depth=0; |
508 |
print_(env); |
while(titem != NULL && titem->item != CAR(val)){ |
509 |
if(env->err) return; |
titem=titem->next; |
510 |
toss(env); |
depth++; |
511 |
} |
} |
512 |
|
if(titem != NULL){ /* If we found it on the stack, */ |
513 |
extern void princ_(environment *env) |
if(fprintf(stream, "#%d#", depth) < 0){ /* print a depth reference */ |
514 |
{ |
perror("print_val"); |
515 |
if(env->head==NULL) { |
env->err= 5; |
516 |
printerr("Too Few Arguments"); |
free(titem); |
517 |
env->err= 1; |
return; |
518 |
return; |
} |
519 |
} |
} else { |
520 |
print_h(env->head, 1); |
print_val(env, CAR(val), noquote, tstack, stream); |
521 |
} |
} |
522 |
|
val= CDR(val); |
523 |
|
switch(val->type){ |
524 |
|
case empty: |
525 |
|
break; |
526 |
|
case tcons: |
527 |
|
/* Search a stack of values being printed to see if we are already |
528 |
|
printing this value */ |
529 |
|
titem=tstack; |
530 |
|
depth=0; |
531 |
|
while(titem != NULL && titem->item != val){ |
532 |
|
titem=titem->next; |
533 |
|
depth++; |
534 |
|
} |
535 |
|
if(titem != NULL){ /* If we found it on the stack, */ |
536 |
|
if(fprintf(stream, " . #%d#", depth) < 0){ /* print a depth reference */ |
537 |
|
perror("print_val"); |
538 |
|
env->err= 5; |
539 |
|
goto printval_end; |
540 |
|
} |
541 |
|
} else { |
542 |
|
if(fprintf(stream, " ") < 0){ |
543 |
|
perror("print_val"); |
544 |
|
env->err= 5; |
545 |
|
goto printval_end; |
546 |
|
} |
547 |
|
} |
548 |
|
break; |
549 |
|
default: |
550 |
|
if(fprintf(stream, " . ") < 0){ /* Improper list */ |
551 |
|
perror("print_val"); |
552 |
|
env->err= 5; |
553 |
|
goto printval_end; |
554 |
|
} |
555 |
|
print_val(env, val, noquote, tstack, stream); |
556 |
|
} |
557 |
|
} while(val->type == tcons && titem == NULL); |
558 |
|
|
559 |
/* Prints the top element of the stack and then discards it. */ |
printval_end: |
|
extern void princ(environment *env) |
|
|
{ |
|
|
princ_(env); |
|
|
if(env->err) return; |
|
|
toss(env); |
|
|
} |
|
560 |
|
|
561 |
/* Only to be called by function printstack. */ |
titem=tstack; |
562 |
void print_st(value *stack_head, long counter) |
while(titem != stack){ |
563 |
{ |
tstack=titem->next; |
564 |
if(CDR(stack_head) != NULL) |
free(titem); |
565 |
print_st(CDR(stack_head), counter+1); |
titem=tstack; |
566 |
printf("%ld: ", counter); |
} |
|
print_h(stack_head, 0); |
|
|
nl(); |
|
|
} |
|
567 |
|
|
568 |
/* Prints the stack. */ |
if(! (env->err)){ |
569 |
extern void printstack(environment *env) |
if(fprintf(stream, " ]") < 0){ |
570 |
{ |
perror("print_val"); |
571 |
if(env->head == NULL) { |
env->err= 5; |
572 |
printf("Stack Empty\n"); |
} |
573 |
return; |
} |
574 |
|
break; |
575 |
} |
} |
|
|
|
|
print_st(env->head, 1); |
|
576 |
} |
} |
577 |
|
|
578 |
/* Swap the two top elements on the stack. */ |
/* Swap the two top elements on the stack. */ |
580 |
{ |
{ |
581 |
value *temp= env->head; |
value *temp= env->head; |
582 |
|
|
583 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type == empty || CDR(env->head)->type == empty) { |
584 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
585 |
env->err=1; |
env->err=1; |
586 |
return; |
return; |
591 |
CDR(env->head)= temp; |
CDR(env->head)= temp; |
592 |
} |
} |
593 |
|
|
|
/* Rotate the first three elements on the stack. */ |
|
|
extern void rot(environment *env) |
|
|
{ |
|
|
value *temp= env->head; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL |
|
|
|| CDR(CDR(env->head))==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
env->head= CDR(CDR(env->head)); |
|
|
CDR(CDR(temp))= CDR(env->head); |
|
|
CDR(env->head)= temp; |
|
|
} |
|
|
|
|
594 |
/* Recall a value from a symbol, if bound */ |
/* Recall a value from a symbol, if bound */ |
595 |
extern void rcl(environment *env) |
extern void rcl(environment *env) |
596 |
{ |
{ |
597 |
value *val; |
value *val; |
598 |
|
|
599 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
600 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
601 |
env->err= 1; |
env->err= 1; |
602 |
return; |
return; |
608 |
return; |
return; |
609 |
} |
} |
610 |
|
|
611 |
val= ((symbol *)(CAR(env->head)->content.ptr))->val; |
val= CAR(env->head)->content.sym->val; |
612 |
if(val == NULL){ |
if(val == NULL){ |
613 |
printerr("Unbound Variable"); |
printerr("Unbound Variable"); |
614 |
env->err= 3; |
env->err= 3; |
615 |
return; |
return; |
616 |
} |
} |
617 |
protect(val); |
push_val(env, val); /* Return the symbol's bound value */ |
618 |
toss(env); /* toss the symbol */ |
swap(env); |
619 |
|
if(env->err) return; |
620 |
|
toss(env); /* toss the symbol */ |
621 |
if(env->err) return; |
if(env->err) return; |
|
push_val(env, val); /* Return its bound value */ |
|
|
unprotect(val); |
|
622 |
} |
} |
623 |
|
|
624 |
|
|
625 |
/* If the top element is a symbol, determine if it's bound to a |
/* If the top element is a symbol, determine if it's bound to a |
626 |
function value, and if it is, toss the symbol and execute the |
function value, and if it is, toss the symbol and execute the |
627 |
function. */ |
function. */ |
635 |
|
|
636 |
gc_maybe(env); |
gc_maybe(env); |
637 |
|
|
638 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
639 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
640 |
env->err= 1; |
env->err= 1; |
641 |
return; |
return; |
666 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
667 |
iterator= temp_val; |
iterator= temp_val; |
668 |
|
|
669 |
while(iterator!=NULL) { |
while(iterator->type != empty) { |
670 |
push_val(env, CAR(iterator)); |
push_val(env, CAR(iterator)); |
671 |
|
|
672 |
if(CAR(env->head)->type==symb |
if(CAR(env->head)->type==symb |
673 |
&& (((symbol*)(CAR(env->head)->content.ptr))->id[0]==';')) { |
&& CAR(env->head)->content.sym->id[0]==';') { |
674 |
toss(env); |
toss(env); |
675 |
if(env->err) return; |
if(env->err) return; |
676 |
|
|
677 |
if(CDR(iterator)==NULL){ |
if(CDR(iterator)->type == empty){ |
678 |
goto eval_start; |
goto eval_start; |
679 |
} |
} |
680 |
eval(env); |
eval(env); |
681 |
if(env->err) return; |
if(env->err) return; |
682 |
} |
} |
683 |
if (CDR(iterator)->type == tcons) |
if (CDR(iterator)->type == empty || CDR(iterator)->type == tcons) |
684 |
iterator= CDR(iterator); |
iterator= CDR(iterator); |
685 |
else { |
else { |
686 |
printerr("Bad Argument Type"); /* Improper list */ |
printerr("Bad Argument Type"); /* Improper list */ |
691 |
unprotect(temp_val); |
unprotect(temp_val); |
692 |
return; |
return; |
693 |
|
|
694 |
default: |
case empty: |
695 |
return; |
toss(env); |
696 |
} |
case integer: |
697 |
} |
case tfloat: |
698 |
|
case string: |
699 |
/* Reverse (flip) a list */ |
case port: |
|
extern void rev(environment *env) |
|
|
{ |
|
|
value *old_head, *new_head, *item; |
|
|
|
|
|
if(env->head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=tcons) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
700 |
return; |
return; |
701 |
} |
} |
|
|
|
|
old_head= CAR(env->head); |
|
|
new_head= NULL; |
|
|
while(old_head!=NULL) { |
|
|
item= old_head; |
|
|
old_head= CDR(old_head); |
|
|
CDR(item)= new_head; |
|
|
new_head= item; |
|
|
} |
|
|
CAR(env->head)= new_head; |
|
|
} |
|
|
|
|
|
/* Make a list. */ |
|
|
extern void pack(environment *env) |
|
|
{ |
|
|
value *iterator, *temp; |
|
|
|
|
|
iterator= env->head; |
|
|
if(iterator==NULL |
|
|
|| (CAR(iterator)->type==symb |
|
|
&& ((symbol*)(CAR(iterator)->content.ptr))->id[0]=='[')) { |
|
|
temp= NULL; |
|
|
toss(env); |
|
|
} else { |
|
|
/* Search for first delimiter */ |
|
|
while(CDR(iterator)!=NULL |
|
|
&& (CAR(CDR(iterator))->type!=symb |
|
|
|| ((symbol*)(CAR(CDR(iterator))->content.ptr))->id[0]!='[')) |
|
|
iterator= CDR(iterator); |
|
|
|
|
|
/* Extract list */ |
|
|
temp= env->head; |
|
|
env->head= CDR(iterator); |
|
|
CDR(iterator)= NULL; |
|
|
|
|
|
if(env->head!=NULL) |
|
|
toss(env); |
|
|
} |
|
|
|
|
|
/* Push list */ |
|
|
|
|
|
push_val(env, temp); |
|
|
rev(env); |
|
702 |
} |
} |
703 |
|
|
704 |
/* Relocate elements of the list on the stack. */ |
/* List all defined words */ |
705 |
extern void expand(environment *env) |
extern void words(environment *env) |
706 |
{ |
{ |
707 |
value *temp, *new_head; |
symbol *temp; |
708 |
|
int i; |
709 |
/* Is top element a list? */ |
|
710 |
if(env->head==NULL) { |
for(i= 0; i<HASHTBLSIZE; i++) { |
711 |
printerr("Too Few Arguments"); |
temp= env->symbols[i]; |
712 |
env->err= 1; |
while(temp!=NULL) { |
713 |
return; |
#ifdef DEBUG |
714 |
} |
if (temp->val != NULL && temp->val->gc.flag.protect) |
715 |
|
printf("(protected) "); |
716 |
if(CAR(env->head)->type!=tcons) { |
#endif /* DEBUG */ |
717 |
printerr("Bad Argument Type"); |
printf("%s ", temp->id); |
718 |
env->err= 2; |
temp= temp->next; |
|
return; |
|
|
} |
|
|
|
|
|
rev(env); |
|
|
|
|
|
if(env->err) |
|
|
return; |
|
|
|
|
|
/* The first list element is the new stack head */ |
|
|
new_head= temp= CAR(env->head); |
|
|
|
|
|
toss(env); |
|
|
|
|
|
/* Find the end of the list */ |
|
|
while(CDR(temp)->content.ptr != NULL) { |
|
|
if (CDR(temp)->type == tcons) |
|
|
temp= CDR(temp); |
|
|
else { |
|
|
printerr("Bad Argument Type"); /* Improper list */ |
|
|
env->err= 2; |
|
|
return; |
|
719 |
} |
} |
720 |
} |
} |
|
|
|
|
/* Connect the tail of the list with the old stack head */ |
|
|
CDR(temp)= env->head; |
|
|
env->head= new_head; /* ...and voila! */ |
|
|
|
|
721 |
} |
} |
722 |
|
|
|
/* Compares two elements by reference. */ |
|
|
extern void eq(environment *env) |
|
|
{ |
|
|
void *left, *right; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
left= CAR(env->head)->content.ptr; |
|
|
right= CAR(CDR(env->head))->content.ptr; |
|
|
toss(env); toss(env); |
|
|
|
|
|
push_int(env, left==right); |
|
|
} |
|
|
|
|
|
/* Negates the top element on the stack. */ |
|
|
extern void not(environment *env) |
|
|
{ |
|
|
int val; |
|
|
|
|
|
if(env->head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
val= CAR(env->head)->content.i; |
|
|
toss(env); |
|
|
push_int(env, !val); |
|
|
} |
|
|
|
|
|
/* Compares the two top elements on the stack and return 0 if they're the |
|
|
same. */ |
|
|
extern void neq(environment *env) |
|
|
{ |
|
|
eq(env); |
|
|
not(env); |
|
|
} |
|
|
|
|
|
/* Give a symbol some content. */ |
|
|
extern void def(environment *env) |
|
|
{ |
|
|
symbol *sym; |
|
|
|
|
|
/* Needs two values on the stack, the top one must be a symbol */ |
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=symb) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
/* long names are a pain */ |
|
|
sym= CAR(env->head)->content.ptr; |
|
|
|
|
|
/* Bind the symbol to the value */ |
|
|
sym->val= CAR(CDR(env->head)); |
|
|
|
|
|
toss(env); toss(env); |
|
|
} |
|
|
|
|
723 |
/* Quit stack. */ |
/* Quit stack. */ |
724 |
extern void quit(environment *env) |
extern void quit(environment *env) |
725 |
{ |
{ |
726 |
int i; |
int i; |
727 |
|
|
728 |
clear(env); |
while(env->head->type != empty) |
729 |
|
toss(env); |
730 |
|
|
731 |
if (env->err) return; |
if (env->err) return; |
732 |
for(i= 0; i<HASHTBLSIZE; i++) { |
for(i= 0; i<HASHTBLSIZE; i++) { |
739 |
env->gc_limit= 0; |
env->gc_limit= 0; |
740 |
gc_maybe(env); |
gc_maybe(env); |
741 |
|
|
742 |
|
words(env); |
743 |
|
|
744 |
if(env->free_string!=NULL) |
if(env->free_string!=NULL) |
745 |
free(env->free_string); |
free(env->free_string); |
746 |
|
|
747 |
|
#ifdef __linux__ |
748 |
muntrace(); |
muntrace(); |
749 |
|
#endif |
750 |
|
|
751 |
exit(EXIT_SUCCESS); |
exit(EXIT_SUCCESS); |
752 |
} |
} |
753 |
|
|
|
/* Clear stack */ |
|
|
extern void clear(environment *env) |
|
|
{ |
|
|
while(env->head!=NULL) |
|
|
toss(env); |
|
|
} |
|
|
|
|
|
/* List all defined words */ |
|
|
extern void words(environment *env) |
|
|
{ |
|
|
symbol *temp; |
|
|
int i; |
|
|
|
|
|
for(i= 0; i<HASHTBLSIZE; i++) { |
|
|
temp= env->symbols[i]; |
|
|
while(temp!=NULL) { |
|
|
printf("%s\n", temp->id); |
|
|
temp= temp->next; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
754 |
/* Internal forget function */ |
/* Internal forget function */ |
755 |
void forget_sym(symbol **hash_entry) |
void forget_sym(symbol **hash_entry) |
756 |
{ |
{ |
763 |
free(temp); |
free(temp); |
764 |
} |
} |
765 |
|
|
766 |
/* Forgets a symbol (remove it from the hash table) */ |
/* Only to be called by itself function printstack. */ |
767 |
extern void forget(environment *env) |
void print_st(environment *env, value *stack_head, long counter) |
768 |
{ |
{ |
769 |
char* sym_id; |
if(CDR(stack_head)->type != empty) |
770 |
value *stack_head= env->head; |
print_st(env, CDR(stack_head), counter+1); |
771 |
|
printf("%ld: ", counter); |
772 |
|
print_val(env, CAR(stack_head), 0, NULL, stdout); |
773 |
|
printf("\n"); |
774 |
|
} |
775 |
|
|
776 |
if(stack_head==NULL) { |
/* Prints the stack. */ |
777 |
printerr("Too Few Arguments"); |
extern void printstack(environment *env) |
778 |
env->err= 1; |
{ |
779 |
return; |
if(env->head->type == empty) { |
780 |
} |
printf("Stack Empty\n"); |
|
|
|
|
if(CAR(stack_head)->type!=symb) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
781 |
return; |
return; |
782 |
} |
} |
783 |
|
|
784 |
sym_id= ((symbol*)(CAR(stack_head)->content.ptr))->id; |
print_st(env, env->head, 1); |
|
toss(env); |
|
|
|
|
|
return forget_sym(hash(env->symbols, sym_id)); |
|
|
} |
|
|
|
|
|
/* Returns the current error number to the stack */ |
|
|
extern void errn(environment *env) |
|
|
{ |
|
|
push_int(env, env->err); |
|
785 |
} |
} |
786 |
|
|
787 |
int main(int argc, char **argv) |
int main(int argc, char **argv) |
790 |
|
|
791 |
int c; /* getopt option character */ |
int c; /* getopt option character */ |
792 |
|
|
793 |
|
#ifdef __linux__ |
794 |
mtrace(); |
mtrace(); |
795 |
|
#endif |
796 |
|
|
797 |
init_env(&myenv); |
init_env(&myenv); |
798 |
|
|
806 |
break; |
break; |
807 |
case '?': |
case '?': |
808 |
fprintf (stderr, |
fprintf (stderr, |
809 |
"Unknown option character `\\x%x'.\n", |
"Unknown option character '\\x%x'.\n", |
810 |
optopt); |
optopt); |
811 |
return EX_USAGE; |
return EX_USAGE; |
812 |
default: |
default: |
825 |
if(myenv.interactive) { |
if(myenv.interactive) { |
826 |
printf("Stack version $Revision$\n\ |
printf("Stack version $Revision$\n\ |
827 |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
828 |
Stack comes with ABSOLUTELY NO WARRANTY; for details type `warranty;'.\n\ |
Stack comes with ABSOLUTELY NO WARRANTY; for details type 'warranty;'.\n\ |
829 |
This is free software, and you are welcome to redistribute it\n\ |
This is free software, and you are welcome to redistribute it\n\ |
830 |
under certain conditions; type `copying;' for details.\n"); |
under certain conditions; type 'copying;' for details.\n"); |
831 |
} |
} |
832 |
|
|
833 |
while(1) { |
while(1) { |
835 |
if (myenv.interactive) { |
if (myenv.interactive) { |
836 |
if(myenv.err) { |
if(myenv.err) { |
837 |
printf("(error %d)\n", myenv.err); |
printf("(error %d)\n", myenv.err); |
838 |
|
myenv.err= 0; |
839 |
} |
} |
840 |
nl(); |
printf("\n"); |
841 |
printstack(&myenv); |
printstack(&myenv); |
842 |
printf("> "); |
printf("> "); |
843 |
} |
} |
844 |
myenv.err=0; |
myenv.err=0; |
845 |
} |
} |
846 |
sx_72656164(&myenv); |
readstream(&myenv, myenv.inputstream); |
847 |
if (myenv.err==4) { |
if (myenv.err) { /* EOF or other error */ |
848 |
return EXIT_SUCCESS; /* EOF */ |
myenv.err=0; |
849 |
} else if(myenv.head!=NULL |
quit(&myenv); |
850 |
|
} else if(myenv.head->type!=empty |
851 |
&& CAR(myenv.head)->type==symb |
&& CAR(myenv.head)->type==symb |
852 |
&& ((symbol*)(CAR(myenv.head)->content.ptr))->id[0] |
&& CAR(myenv.head)->content.sym->id[0] == ';') { |
853 |
==';') { |
toss(&myenv); if(myenv.err) continue; |
|
toss(&myenv); /* No error check in main */ |
|
854 |
eval(&myenv); |
eval(&myenv); |
855 |
|
} else { |
856 |
|
gc_maybe(&myenv); |
857 |
} |
} |
|
gc_maybe(&myenv); |
|
858 |
} |
} |
859 |
quit(&myenv); |
quit(&myenv); |
860 |
return EXIT_FAILURE; |
return EXIT_FAILURE; |
861 |
} |
} |
862 |
|
|
|
/* "+" */ |
|
|
extern void sx_2b(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
float fa, fb; |
|
|
size_t len; |
|
|
char* new_string; |
|
|
value *a_val, *b_val; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==string |
|
|
&& CAR(CDR(env->head))->type==string) { |
|
|
a_val= CAR(env->head); |
|
|
b_val= CAR(CDR(env->head)); |
|
|
protect(a_val); protect(b_val); |
|
|
toss(env); if(env->err) return; |
|
|
toss(env); if(env->err) return; |
|
|
len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1; |
|
|
new_string= malloc(len); |
|
|
strcpy(new_string, b_val->content.ptr); |
|
|
strcat(new_string, a_val->content.ptr); |
|
|
push_cstring(env, new_string); |
|
|
unprotect(a_val); unprotect(b_val); |
|
|
free(new_string); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b+a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb+fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b+fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb+a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
} |
|
|
|
|
|
/* "-" */ |
|
|
extern void sx_2d(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
float fa, fb; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b-a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb-fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b-fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb-a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
} |
|
|
|
|
|
/* ">" */ |
|
|
extern void sx_3e(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
float fa, fb; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b>a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, fb>fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b>fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, fb>a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
} |
|
|
|
|
|
/* "<" */ |
|
|
extern void sx_3c(environment *env) |
|
|
{ |
|
|
swap(env); if(env->err) return; |
|
|
sx_3e(env); |
|
|
} |
|
|
|
|
|
/* "<=" */ |
|
|
extern void sx_3c3d(environment *env) |
|
|
{ |
|
|
sx_3e(env); if(env->err) return; |
|
|
not(env); |
|
|
} |
|
|
|
|
|
/* ">=" */ |
|
|
extern void sx_3e3d(environment *env) |
|
|
{ |
|
|
sx_3c(env); if(env->err) return; |
|
|
not(env); |
|
|
} |
|
|
|
|
863 |
/* Return copy of a value */ |
/* Return copy of a value */ |
864 |
value *copy_val(environment *env, value *old_value) |
value *copy_val(environment *env, value *old_value) |
865 |
{ |
{ |
868 |
if(old_value==NULL) |
if(old_value==NULL) |
869 |
return NULL; |
return NULL; |
870 |
|
|
|
protect(old_value); |
|
871 |
new_value= new_val(env); |
new_value= new_val(env); |
|
protect(new_value); |
|
872 |
new_value->type= old_value->type; |
new_value->type= old_value->type; |
873 |
|
|
874 |
switch(old_value->type){ |
switch(old_value->type){ |
876 |
case integer: |
case integer: |
877 |
case func: |
case func: |
878 |
case symb: |
case symb: |
879 |
|
case empty: |
880 |
|
case port: |
881 |
new_value->content= old_value->content; |
new_value->content= old_value->content; |
882 |
break; |
break; |
883 |
case string: |
case string: |
885 |
strdup((char *)(old_value->content.ptr)); |
strdup((char *)(old_value->content.ptr)); |
886 |
break; |
break; |
887 |
case tcons: |
case tcons: |
|
new_value= NULL; |
|
888 |
|
|
889 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
890 |
|
assert(new_value->content.c!=NULL); |
891 |
|
env->gc_count += sizeof(pair); |
892 |
|
|
893 |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
894 |
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
895 |
break; |
break; |
896 |
} |
} |
897 |
|
|
|
unprotect(old_value); unprotect(new_value); |
|
|
|
|
898 |
return new_value; |
return new_value; |
899 |
} |
} |
900 |
|
|
901 |
/* "dup"; duplicates an item on the stack */ |
/* read a line from a stream; used by readline */ |
902 |
extern void sx_647570(environment *env) |
void readlinestream(environment *env, FILE *stream) |
|
{ |
|
|
if(env->head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
push_val(env, copy_val(env, CAR(env->head))); |
|
|
} |
|
|
|
|
|
/* "if", If-Then */ |
|
|
extern void sx_6966(environment *env) |
|
903 |
{ |
{ |
904 |
int truth; |
char in_string[101]; |
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(CDR(env->head))->type != integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
swap(env); |
|
|
if(env->err) return; |
|
|
|
|
|
truth= CAR(env->head)->content.i; |
|
|
|
|
|
toss(env); |
|
|
if(env->err) return; |
|
|
|
|
|
if(truth) |
|
|
eval(env); |
|
|
else |
|
|
toss(env); |
|
|
} |
|
|
|
|
|
/* If-Then-Else */ |
|
|
extern void ifelse(environment *env) |
|
|
{ |
|
|
int truth; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL |
|
|
|| CDR(CDR(env->head))==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(CDR(CDR(env->head)))->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
rot(env); |
|
|
if(env->err) return; |
|
|
|
|
|
truth= CAR(env->head)->content.i; |
|
|
|
|
|
toss(env); |
|
|
if(env->err) return; |
|
|
|
|
|
if(!truth) |
|
|
swap(env); |
|
|
if(env->err) return; |
|
|
|
|
|
toss(env); |
|
|
if(env->err) return; |
|
|
|
|
|
eval(env); |
|
|
} |
|
|
|
|
|
/* "while" */ |
|
|
extern void sx_7768696c65(environment *env) |
|
|
{ |
|
|
int truth; |
|
|
value *loop, *test; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
loop= CAR(env->head); |
|
|
protect(loop); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
test= CAR(env->head); |
|
|
protect(test); |
|
|
toss(env); if(env->err) return; |
|
905 |
|
|
906 |
do { |
if(fgets(in_string, 100, stream)==NULL) { |
907 |
push_val(env, test); |
push_cstring(env, ""); |
908 |
eval(env); |
if (! feof(stream)){ |
909 |
|
perror("readline"); |
910 |
if(CAR(env->head)->type != integer) { |
env->err= 5; |
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
truth= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
if(truth) { |
|
|
push_val(env, loop); |
|
|
eval(env); |
|
|
} else { |
|
|
toss(env); |
|
911 |
} |
} |
912 |
|
} else { |
913 |
} while(truth); |
push_cstring(env, in_string); |
914 |
|
} |
|
unprotect(loop); unprotect(test); |
|
915 |
} |
} |
916 |
|
|
917 |
|
/* Reverse (flip) a list */ |
918 |
/* "for"; for-loop */ |
extern void rev(environment *env) |
|
extern void sx_666f72(environment *env) |
|
919 |
{ |
{ |
920 |
value *loop; |
value *old_head, *new_head, *item; |
|
int foo1, foo2; |
|
921 |
|
|
922 |
if(env->head==NULL || CDR(env->head)==NULL |
if(env->head->type==empty) { |
|
|| CDR(CDR(env->head))==NULL) { |
|
923 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
924 |
env->err= 1; |
env->err= 1; |
925 |
return; |
return; |
926 |
} |
} |
927 |
|
|
928 |
if(CAR(CDR(env->head))->type!=integer |
if(CAR(env->head)->type==empty) |
929 |
|| CAR(CDR(CDR(env->head)))->type!=integer) { |
return; /* Don't reverse an empty list */ |
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
loop= CAR(env->head); |
|
|
protect(loop); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
foo2= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
foo1= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
if(foo1<=foo2) { |
|
|
while(foo1<=foo2) { |
|
|
push_int(env, foo1); |
|
|
push_val(env, loop); |
|
|
eval(env); if(env->err) return; |
|
|
foo1++; |
|
|
} |
|
|
} else { |
|
|
while(foo1>=foo2) { |
|
|
push_int(env, foo1); |
|
|
push_val(env, loop); |
|
|
eval(env); if(env->err) return; |
|
|
foo1--; |
|
|
} |
|
|
} |
|
|
unprotect(loop); |
|
|
} |
|
|
|
|
|
/* Variant of for-loop */ |
|
|
extern void foreach(environment *env) |
|
|
{ |
|
|
value *loop, *foo; |
|
|
value *iterator; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
930 |
|
|
931 |
if(CAR(CDR(env->head))->type!=tcons) { |
if(CAR(env->head)->type!=tcons) { |
932 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
933 |
env->err= 2; |
env->err= 2; |
934 |
return; |
return; |
935 |
} |
} |
936 |
|
|
937 |
loop= CAR(env->head); |
old_head= CAR(env->head); |
938 |
protect(loop); |
new_head= new_val(env); |
939 |
toss(env); if(env->err) return; |
while(old_head->type != empty) { |
940 |
|
item= old_head; |
941 |
foo= CAR(env->head); |
old_head= CDR(old_head); |
942 |
protect(foo); |
CDR(item)= new_head; |
943 |
toss(env); if(env->err) return; |
new_head= item; |
|
|
|
|
iterator= foo; |
|
|
|
|
|
while(iterator!=NULL) { |
|
|
push_val(env, CAR(iterator)); |
|
|
push_val(env, loop); |
|
|
eval(env); if(env->err) return; |
|
|
if (CDR(iterator)->type == tcons){ |
|
|
iterator= CDR(iterator); |
|
|
} else { |
|
|
printerr("Bad Argument Type"); /* Improper list */ |
|
|
env->err= 2; |
|
|
break; |
|
|
} |
|
944 |
} |
} |
945 |
unprotect(loop); unprotect(foo); |
CAR(env->head)= new_head; |
946 |
} |
} |
947 |
|
|
948 |
/* "to" */ |
/* Make a list. */ |
949 |
extern void to(environment *env) |
extern void pack(environment *env) |
950 |
{ |
{ |
951 |
int ending, start, i; |
value *iterator, *temp, *ending; |
|
value *iterator, *temp; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=integer |
|
|
|| CAR(CDR(env->head))->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
ending= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
start= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
952 |
|
|
953 |
push_sym(env, "["); |
ending=new_val(env); |
|
|
|
|
if(ending>=start) { |
|
|
for(i= ending; i>=start; i--) |
|
|
push_int(env, i); |
|
|
} else { |
|
|
for(i= ending; i<=start; i++) |
|
|
push_int(env, i); |
|
|
} |
|
954 |
|
|
955 |
iterator= env->head; |
iterator= env->head; |
956 |
|
if(iterator->type == empty |
|
if(iterator==NULL |
|
957 |
|| (CAR(iterator)->type==symb |
|| (CAR(iterator)->type==symb |
958 |
&& ((symbol*)(CAR(iterator)->content.ptr))->id[0]=='[')) { |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
959 |
temp= NULL; |
temp= ending; |
960 |
toss(env); |
toss(env); |
961 |
} else { |
} else { |
962 |
/* Search for first delimiter */ |
/* Search for first delimiter */ |
963 |
while(CDR(iterator)!=NULL |
while(CDR(iterator)->type != empty |
964 |
&& (CAR(CDR(iterator))->type!=symb |
&& (CAR(CDR(iterator))->type!=symb |
965 |
|| ((symbol*)(CAR(CDR(iterator))->content.ptr))->id[0] |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
|
!='[')) |
|
966 |
iterator= CDR(iterator); |
iterator= CDR(iterator); |
967 |
|
|
968 |
/* Extract list */ |
/* Extract list */ |
969 |
temp= env->head; |
temp= env->head; |
970 |
env->head= CDR(iterator); |
env->head= CDR(iterator); |
971 |
CDR(iterator)= NULL; |
CDR(iterator)= ending; |
972 |
|
|
973 |
if(env->head!=NULL) |
if(env->head->type != empty) |
974 |
toss(env); |
toss(env); |
975 |
} |
} |
976 |
|
|
977 |
/* Push list */ |
/* Push list */ |
|
push_val(env, temp); |
|
|
} |
|
978 |
|
|
979 |
/* Read a string */ |
push_val(env, temp); |
980 |
extern void readline(environment *env) |
rev(env); |
|
{ |
|
|
char in_string[101]; |
|
|
|
|
|
if(fgets(in_string, 100, env->inputstream)==NULL) |
|
|
push_cstring(env, ""); |
|
|
else |
|
|
push_cstring(env, in_string); |
|
981 |
} |
} |
982 |
|
|
983 |
/* "read"; Read a value and place on stack */ |
/* read from a stream; used by "read" and "readport" */ |
984 |
extern void sx_72656164(environment *env) |
void readstream(environment *env, FILE *stream) |
985 |
{ |
{ |
986 |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
987 |
const char strform[]= "\"%[^\"]\"%n"; |
const char strform[]= "\"%[^\"]\"%n"; |
996 |
int count= -1; |
int count= -1; |
997 |
float ftemp; |
float ftemp; |
998 |
static int depth= 0; |
static int depth= 0; |
999 |
char *match, *ctemp; |
char *match; |
1000 |
size_t inlength; |
size_t inlength; |
1001 |
|
|
1002 |
if(env->in_string==NULL) { |
if(env->in_string==NULL) { |
1003 |
if(depth > 0 && env->interactive) { |
if(depth > 0 && env->interactive) { |
1004 |
printf("]> "); |
printf("]> "); |
1005 |
} |
} |
1006 |
readline(env); if(env->err) return; |
readlinestream(env, env->inputstream); |
1007 |
|
if(env->err) return; |
1008 |
|
|
1009 |
if(((char *)(CAR(env->head)->content.ptr))[0]=='\0'){ |
if(((char *)(CAR(env->head)->content.ptr))[0]=='\0'){ |
1010 |
env->err= 4; /* "" means EOF */ |
env->err= 4; /* "" means EOF */ |
1012 |
} |
} |
1013 |
|
|
1014 |
env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1); |
env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1); |
1015 |
|
assert(env->in_string != NULL); |
1016 |
env->free_string= env->in_string; /* Save the original pointer */ |
env->free_string= env->in_string; /* Save the original pointer */ |
1017 |
strcpy(env->in_string, CAR(env->head)->content.ptr); |
strcpy(env->in_string, CAR(env->head)->content.ptr); |
1018 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1020 |
|
|
1021 |
inlength= strlen(env->in_string)+1; |
inlength= strlen(env->in_string)+1; |
1022 |
match= malloc(inlength); |
match= malloc(inlength); |
1023 |
|
assert(match != NULL); |
1024 |
|
|
1025 |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
1026 |
&& readlength != -1) { |
&& readlength != -1) { |
1033 |
} else { |
} else { |
1034 |
push_float(env, ftemp); |
push_float(env, ftemp); |
1035 |
} |
} |
1036 |
|
} else if(sscanf(env->in_string, "\"\"%n", &readlength) != EOF |
1037 |
|
&& readlength != -1) { |
1038 |
|
push_cstring(env, ""); |
1039 |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
1040 |
&& readlength != -1) { |
&& readlength != -1) { |
1041 |
push_cstring(env, match); |
push_cstring(env, match); |
1064 |
free(match); |
free(match); |
1065 |
|
|
1066 |
if(depth) |
if(depth) |
1067 |
return sx_72656164(env); |
return readstream(env, env->inputstream); |
|
} |
|
|
|
|
|
extern void beep(environment *env) |
|
|
{ |
|
|
int freq, dur, period, ticks; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=integer |
|
|
|| CAR(CDR(env->head))->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
dur= CAR(env->head)->content.i; |
|
|
toss(env); |
|
|
freq= CAR(env->head)->content.i; |
|
|
toss(env); |
|
|
|
|
|
period= 1193180/freq; /* convert freq from Hz to period |
|
|
length */ |
|
|
ticks= dur*.001193180; /* convert duration from µseconds to |
|
|
timer ticks */ |
|
|
|
|
|
/* ticks=dur/1000; */ |
|
|
|
|
|
/* if (ioctl(STDOUT_FILENO, KDMKTONE, (125<<16) + 0x637)==0) */ |
|
|
switch (ioctl(STDOUT_FILENO, KDMKTONE, (ticks<<16) | period)){ |
|
|
case 0: |
|
|
usleep(dur); |
|
|
return; |
|
|
case -1: |
|
|
perror("beep"); |
|
|
env->err= 5; |
|
|
return; |
|
|
default: |
|
|
abort(); |
|
|
} |
|
|
} |
|
|
|
|
|
/* "wait" */ |
|
|
extern void sx_77616974(environment *env) |
|
|
{ |
|
|
int dur; |
|
|
|
|
|
if(env->head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
dur= CAR(env->head)->content.i; |
|
|
toss(env); |
|
|
|
|
|
usleep(dur); |
|
1068 |
} |
} |
1069 |
|
|
1070 |
extern void copying(environment *env) |
extern void copying(environment *env) |
1071 |
{ |
{ |
1072 |
printf("GNU GENERAL PUBLIC LICENSE\n\ |
printf(" GNU GENERAL PUBLIC LICENSE\n\ |
1073 |
Version 2, June 1991\n\ |
Version 2, June 1991\n\ |
1074 |
\n\ |
\n\ |
1075 |
Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ |
Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ |
1352 |
POSSIBILITY OF SUCH DAMAGES.\n"); |
POSSIBILITY OF SUCH DAMAGES.\n"); |
1353 |
} |
} |
1354 |
|
|
1355 |
/* "*" */ |
/* General assoc function */ |
1356 |
extern void sx_2a(environment *env) |
void assocgen(environment *env, funcp eqfunc) |
1357 |
{ |
{ |
1358 |
int a, b; |
value *key, *item; |
|
float fa, fb; |
|
1359 |
|
|
1360 |
if(env->head==NULL || CDR(env->head)==NULL) { |
/* Needs two values on the stack, the top one must be an association |
1361 |
|
list */ |
1362 |
|
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1363 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1364 |
env->err= 1; |
env->err= 1; |
1365 |
return; |
return; |
1366 |
} |
} |
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b*a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==tfloat |
|
|
&& CAR(CDR(env->head))->type==tfloat) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb*fa); |
|
|
|
|
|
return; |
|
|
} |
|
1367 |
|
|
1368 |
if(CAR(env->head)->type==tfloat |
if(CAR(env->head)->type!=tcons) { |
1369 |
&& CAR(CDR(env->head))->type==integer) { |
printerr("Bad Argument Type"); |
1370 |
fa= CAR(env->head)->content.f; |
env->err= 2; |
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b*fa); |
|
|
|
|
1371 |
return; |
return; |
1372 |
} |
} |
1373 |
|
|
1374 |
if(CAR(env->head)->type==integer |
key=CAR(CDR(env->head)); |
1375 |
&& CAR(CDR(env->head))->type==tfloat) { |
item=CAR(env->head); |
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb*a); |
|
1376 |
|
|
1377 |
|
while(item->type == tcons){ |
1378 |
|
if(CAR(item)->type != tcons){ |
1379 |
|
printerr("Bad Argument Type"); |
1380 |
|
env->err= 2; |
1381 |
|
return; |
1382 |
|
} |
1383 |
|
push_val(env, key); |
1384 |
|
push_val(env, CAR(CAR(item))); |
1385 |
|
eqfunc(env); if(env->err) return; |
1386 |
|
|
1387 |
|
/* Check the result of 'eqfunc' */ |
1388 |
|
if(env->head->type==empty) { |
1389 |
|
printerr("Too Few Arguments"); |
1390 |
|
env->err= 1; |
1391 |
return; |
return; |
1392 |
} |
} |
1393 |
|
if(CAR(env->head)->type!=integer) { |
1394 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
1395 |
env->err= 2; |
env->err= 2; |
1396 |
} |
return; |
1397 |
|
} |
|
/* "/" */ |
|
|
extern void sx_2f(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
float fa, fb; |
|
1398 |
|
|
1399 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(CAR(env->head)->content.i){ |
1400 |
printerr("Too Few Arguments"); |
toss(env); if(env->err) return; |
1401 |
env->err= 1; |
break; |
1402 |
return; |
} |
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
1403 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
|
push_float(env, b/a); |
|
1404 |
|
|
1405 |
return; |
if(item->type!=tcons) { |
1406 |
} |
printerr("Bad Argument Type"); |
1407 |
|
env->err= 2; |
1408 |
if(CAR(env->head)->type==tfloat |
return; |
1409 |
&& CAR(CDR(env->head))->type==tfloat) { |
} |
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb/fa); |
|
|
|
|
|
return; |
|
|
} |
|
1410 |
|
|
1411 |
if(CAR(env->head)->type==tfloat |
item=CDR(item); |
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
fa= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b/fa); |
|
|
|
|
|
return; |
|
1412 |
} |
} |
1413 |
|
|
1414 |
if(CAR(env->head)->type==integer |
if(item->type == tcons){ /* A match was found */ |
1415 |
&& CAR(CDR(env->head))->type==tfloat) { |
push_val(env, CAR(item)); |
1416 |
a= CAR(env->head)->content.i; |
} else { |
1417 |
toss(env); if(env->err) return; |
push_int(env, 0); |
|
fb= CAR(env->head)->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb/a); |
|
|
|
|
|
return; |
|
1418 |
} |
} |
1419 |
|
swap(env); if(env->err) return; |
1420 |
printerr("Bad Argument Type"); |
toss(env); if(env->err) return; |
1421 |
env->err= 2; |
swap(env); if(env->err) return; |
1422 |
|
toss(env); |
1423 |
} |
} |
1424 |
|
|
1425 |
/* "mod" */ |
/* Discard the top element of the stack. */ |
1426 |
extern void mod(environment *env) |
extern void toss(environment *env) |
1427 |
{ |
{ |
1428 |
int a, b; |
if(env->head->type==empty) { |
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
1429 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1430 |
env->err= 1; |
env->err= 1; |
1431 |
return; |
return; |
1432 |
} |
} |
1433 |
|
|
1434 |
if(CAR(env->head)->type==integer |
env->head= CDR(env->head); /* Remove the top stack item */ |
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b%a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
1435 |
} |
} |
1436 |
|
|
|
/* "div" */ |
|
|
extern void sx_646976(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
|
|
|
if(env->head==NULL || CDR(env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(CAR(env->head)->type==integer |
|
|
&& CAR(CDR(env->head))->type==integer) { |
|
|
a= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= CAR(env->head)->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, (int)b/a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
} |
|