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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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/* 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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#include "stack.h" |
#include "stack.h" |
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26 |
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const char* start_message= "Stack version $Revision$\n\ |
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Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
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Stack comes with ABSOLUTELY NO WARRANTY; for details type 'warranty;'.\n\ |
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This is free software, and you are welcome to redistribute it\n\ |
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under certain conditions; type 'copying;' for details.\n"; |
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33 |
/* Initialize a newly created environment */ |
/* Initialize a newly created environment */ |
34 |
void init_env(environment *env) |
void init_env(environment *env) |
35 |
{ |
{ |
36 |
int i; |
int i; |
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38 |
env->gc_limit= 20; |
env->gc_limit= 400000; |
39 |
env->gc_count= 0; |
env->gc_count= 0; |
40 |
env->gc_ref= NULL; |
env->gc_ref= NULL; |
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env->gc_protect= NULL; |
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41 |
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42 |
env->head= NULL; |
env->head= new_val(env); |
43 |
for(i= 0; i<HASHTBLSIZE; i++) |
for(i= 0; i<HASHTBLSIZE; i++) |
44 |
env->symbols[i]= NULL; |
env->symbols[i]= NULL; |
45 |
env->err= 0; |
env->err= 0; |
49 |
env->interactive= 1; |
env->interactive= 1; |
50 |
} |
} |
51 |
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void printerr(const char* in_string) { |
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fprintf(stderr, "Err: %s\n", in_string); |
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} |
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/* Discard the top element of the stack. */ |
void printerr(environment *env) |
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extern void toss(environment *env) |
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{ |
{ |
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stackitem *temp= env->head; |
char *in_string; |
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57 |
if((env->head)==NULL) { |
switch(env->err) { |
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printerr("Too Few Arguments"); |
case 0: |
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env->err= 1; |
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return; |
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 |
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default: |
70 |
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in_string= "Unknown error"; |
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break; |
72 |
} |
} |
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env->head= env->head->next; /* Remove the top stack item */ |
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free(temp); /* Free the old top stack item */ |
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gc_init(env); |
fprintf(stderr, "\"%s\":\nErr: %s\n", env->errsymb, in_string); |
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} |
} |
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/* 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. */ |
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symbol **hash(hashtbl in_hashtbl, const char *in_string) |
symbol **hash(hashtbl in_hashtbl, const char *in_string) |
80 |
{ |
{ |
104 |
} |
} |
105 |
} |
} |
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107 |
value* new_val(environment *env) { |
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108 |
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/* Create new value */ |
109 |
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value* new_val(environment *env) |
110 |
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{ |
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value *nval= malloc(sizeof(value)); |
value *nval= malloc(sizeof(value)); |
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stackitem *nitem= malloc(sizeof(stackitem)); |
stackitem *nitem= malloc(sizeof(stackitem)); |
113 |
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114 |
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assert(nval != NULL); |
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assert(nitem != NULL); |
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nval->content.ptr= NULL; |
nval->content.ptr= NULL; |
118 |
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nval->type= empty; |
119 |
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nitem->item= nval; |
nitem->item= nval; |
121 |
nitem->next= env->gc_ref; |
nitem->next= env->gc_ref; |
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env->gc_ref= nitem; |
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122 |
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123 |
env->gc_count++; |
env->gc_ref= nitem; |
124 |
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protect(env, nval); |
env->gc_count += sizeof(value); |
126 |
gc_init(env); |
nval->gc.flag.mark= 0; |
127 |
unprotect(env); |
nval->gc.flag.protect= 0; |
128 |
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129 |
return nval; |
return nval; |
130 |
} |
} |
131 |
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void gc_mark(value *val) { |
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stackitem *iterator; |
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132 |
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133 |
if(val==NULL || val->gc_garb==0) |
/* Mark values recursively. |
134 |
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Marked values are not collected by the GC. */ |
135 |
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inline void gc_mark(value *val) |
136 |
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{ |
137 |
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if(val==NULL || val->gc.flag.mark) |
138 |
return; |
return; |
139 |
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val->gc_garb= 0; |
val->gc.flag.mark= 1; |
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if(val->type==list) { |
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iterator= val->content.ptr; |
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141 |
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142 |
while(iterator!=NULL) { |
if(val->type==tcons) { |
143 |
gc_mark(iterator->item); |
gc_mark(CAR(val)); |
144 |
iterator= iterator->next; |
gc_mark(CDR(val)); |
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} |
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145 |
} |
} |
146 |
} |
} |
147 |
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148 |
extern void gc_init(environment *env) { |
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stackitem *new_head= NULL, *titem, *iterator; |
/* Start GC */ |
150 |
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extern void gc_init(environment *env) |
151 |
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{ |
152 |
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stackitem *new_head= NULL, *titem; |
153 |
symbol *tsymb; |
symbol *tsymb; |
154 |
int i; |
int i; |
155 |
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156 |
if(env->gc_count < env->gc_limit) |
if(env->interactive) |
157 |
return; |
printf("Garbage collecting."); |
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/* Garb by default */ |
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iterator= env->gc_ref; |
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while(iterator!=NULL) { |
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iterator->item->gc_garb= 1; |
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iterator= iterator->next; |
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} |
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158 |
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159 |
/* Mark protected values */ |
/* Mark values on stack */ |
160 |
iterator= env->gc_protect; |
gc_mark(env->head); |
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while(iterator!=NULL) { |
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gc_mark(iterator->item); |
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iterator= iterator->next; |
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} |
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161 |
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162 |
/* Mark values in stack */ |
if(env->interactive) |
163 |
iterator= env->head; |
printf("."); |
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while(iterator!=NULL) { |
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gc_mark(iterator->item); |
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iterator= iterator->next; |
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} |
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164 |
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165 |
/* Mark values in hashtable */ |
/* Mark values in hashtable */ |
166 |
for(i= 0; i<HASHTBLSIZE; i++) { |
for(i= 0; i<HASHTBLSIZE; i++) |
167 |
tsymb= env->symbols[i]; |
for(tsymb= env->symbols[i]; tsymb!=NULL; tsymb= tsymb->next) |
168 |
while(tsymb!=NULL) { |
if (tsymb->val != NULL) |
169 |
gc_mark(tsymb->val); |
gc_mark(tsymb->val); |
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tsymb= tsymb->next; |
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} |
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} |
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170 |
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171 |
env->gc_count= 0; |
if(env->interactive) |
172 |
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printf("."); |
173 |
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174 |
/* Sweep */ |
env->gc_count= 0; |
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while(env->gc_ref!=NULL) { |
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175 |
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176 |
if(env->gc_ref->item->gc_garb) { |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
177 |
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if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
178 |
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179 |
/* Remove content */ |
/* Remove content */ |
180 |
switch(env->gc_ref->item->type) { |
switch(env->gc_ref->item->type){ |
181 |
case string: |
case string: |
182 |
free(env->gc_ref->item->content.ptr); |
free(env->gc_ref->item->content.string); |
183 |
break; |
break; |
184 |
case list: |
case tcons: |
185 |
while(env->gc_ref->item->content.ptr!=NULL) { |
free(env->gc_ref->item->content.c); |
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titem= env->gc_ref->item->content.ptr; |
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env->gc_ref->item->content.ptr= titem->next; |
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free(titem); |
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} |
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186 |
break; |
break; |
187 |
default: |
case port: |
188 |
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case empty: |
189 |
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case unknown: |
190 |
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case integer: |
191 |
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case tfloat: |
192 |
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case func: |
193 |
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case symb: |
194 |
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/* Symbol strings are freed when walking the hash table */ |
195 |
break; |
break; |
196 |
} |
} |
197 |
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198 |
free(env->gc_ref->item); /* Remove from gc_ref */ |
free(env->gc_ref->item); /* Remove from gc_ref */ |
199 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
200 |
free(env->gc_ref); /* Remove value */ |
free(env->gc_ref); /* Remove value */ |
201 |
env->gc_ref= titem; |
env->gc_ref= titem; |
202 |
} else { /* Save */ |
continue; |
203 |
titem= env->gc_ref->next; |
} |
204 |
env->gc_ref->next= new_head; |
|
205 |
new_head= env->gc_ref; |
#ifdef DEBUG |
206 |
env->gc_ref= titem; |
printf("Kept value (%p)", env->gc_ref->item); |
207 |
env->gc_count++; |
if(env->gc_ref->item->gc.flag.mark) |
208 |
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printf(" (marked)"); |
209 |
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if(env->gc_ref->item->gc.flag.protect) |
210 |
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printf(" (protected)"); |
211 |
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switch(env->gc_ref->item->type){ |
212 |
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case integer: |
213 |
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printf(" integer: %d", env->gc_ref->item->content.i); |
214 |
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break; |
215 |
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case func: |
216 |
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printf(" func: %p", env->gc_ref->item->content.func); |
217 |
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break; |
218 |
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case symb: |
219 |
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printf(" symb: %s", env->gc_ref->item->content.sym->id); |
220 |
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break; |
221 |
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case tcons: |
222 |
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printf(" tcons: %p\t%p", CAR(env->gc_ref->item), |
223 |
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CDR(env->gc_ref->item)); |
224 |
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break; |
225 |
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default: |
226 |
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printf(" <unknown %d>", (env->gc_ref->item->type)); |
227 |
} |
} |
228 |
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printf("\n"); |
229 |
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#endif /* DEBUG */ |
230 |
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231 |
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/* Keep values */ |
232 |
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env->gc_count += sizeof(value); |
233 |
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if(env->gc_ref->item->type==string) |
234 |
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env->gc_count += strlen(env->gc_ref->item->content.string)+1; |
235 |
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236 |
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titem= env->gc_ref->next; |
237 |
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env->gc_ref->next= new_head; |
238 |
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new_head= env->gc_ref; |
239 |
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new_head->item->gc.flag.mark= 0; |
240 |
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env->gc_ref= titem; |
241 |
} |
} |
242 |
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243 |
env->gc_limit= env->gc_count*2; |
if (env->gc_limit < env->gc_count*2) |
244 |
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env->gc_limit= env->gc_count*2; |
245 |
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246 |
env->gc_ref= new_head; |
env->gc_ref= new_head; |
247 |
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248 |
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if(env->interactive) |
249 |
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printf("done (%d bytes still allocated)\n", env->gc_count); |
250 |
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251 |
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} |
252 |
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253 |
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254 |
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inline void gc_maybe(environment *env) |
255 |
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{ |
256 |
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if(env->gc_count < env->gc_limit) |
257 |
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return; |
258 |
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else |
259 |
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return gc_init(env); |
260 |
} |
} |
261 |
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262 |
void protect(environment *env, value *val) |
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263 |
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/* Protect values from GC */ |
264 |
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void protect(value *val) |
265 |
{ |
{ |
266 |
stackitem *new_item= malloc(sizeof(stackitem)); |
if(val==NULL || val->gc.flag.protect) |
267 |
new_item->item= val; |
return; |
268 |
new_item->next= env->gc_protect; |
|
269 |
env->gc_protect= new_item; |
val->gc.flag.protect= 1; |
270 |
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271 |
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if(val->type==tcons) { |
272 |
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protect(CAR(val)); |
273 |
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protect(CDR(val)); |
274 |
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} |
275 |
} |
} |
276 |
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277 |
void unprotect(environment *env) |
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278 |
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/* Unprotect values from GC */ |
279 |
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void unprotect(value *val) |
280 |
{ |
{ |
281 |
stackitem *temp= env->gc_protect; |
if(val==NULL || !(val->gc.flag.protect)) |
282 |
env->gc_protect= env->gc_protect->next; |
return; |
283 |
free(temp); |
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284 |
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val->gc.flag.protect= 0; |
285 |
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286 |
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if(val->type==tcons) { |
287 |
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unprotect(CAR(val)); |
288 |
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unprotect(CDR(val)); |
289 |
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} |
290 |
} |
} |
291 |
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292 |
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293 |
/* Push a value onto the stack */ |
/* Push a value onto the stack */ |
294 |
void push_val(environment *env, value *val) |
void push_val(environment *env, value *val) |
295 |
{ |
{ |
296 |
stackitem *new_item= malloc(sizeof(stackitem)); |
value *new_value= new_val(env); |
297 |
new_item->item= val; |
|
298 |
new_item->next= env->head; |
new_value->content.c= malloc(sizeof(pair)); |
299 |
env->head= new_item; |
assert(new_value->content.c!=NULL); |
300 |
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env->gc_count += sizeof(pair); |
301 |
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new_value->type= tcons; |
302 |
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CAR(new_value)= val; |
303 |
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CDR(new_value)= env->head; |
304 |
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env->head= new_value; |
305 |
} |
} |
306 |
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307 |
/* Push an integer onto the stack. */ |
|
308 |
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/* Push an integer onto the stack */ |
309 |
void push_int(environment *env, int in_val) |
void push_int(environment *env, int in_val) |
310 |
{ |
{ |
311 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
316 |
push_val(env, new_value); |
push_val(env, new_value); |
317 |
} |
} |
318 |
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319 |
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320 |
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/* Push a floating point number onto the stack */ |
321 |
void push_float(environment *env, float in_val) |
void push_float(environment *env, float in_val) |
322 |
{ |
{ |
323 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
328 |
push_val(env, new_value); |
push_val(env, new_value); |
329 |
} |
} |
330 |
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331 |
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332 |
/* Copy a string onto the stack. */ |
/* Copy a string onto the stack. */ |
333 |
void push_cstring(environment *env, const char *in_string) |
void push_cstring(environment *env, const char *in_string) |
334 |
{ |
{ |
335 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
336 |
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int length= strlen(in_string)+1; |
337 |
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338 |
new_value->content.ptr= malloc(strlen(in_string)+1); |
new_value->content.string= malloc(length); |
339 |
strcpy(new_value->content.ptr, in_string); |
assert(new_value != NULL); |
340 |
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env->gc_count += length; |
341 |
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strcpy(new_value->content.string, in_string); |
342 |
new_value->type= string; |
new_value->type= string; |
343 |
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344 |
push_val(env, new_value); |
push_val(env, new_value); |
345 |
} |
} |
346 |
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347 |
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348 |
/* Mangle a symbol name to a valid C identifier name */ |
/* Mangle a symbol name to a valid C identifier name */ |
349 |
char *mangle_str(const char *old_string){ |
char *mangle_str(const char *old_string) |
350 |
|
{ |
351 |
char validchars[]= "0123456789abcdef"; |
char validchars[]= "0123456789abcdef"; |
352 |
char *new_string, *current; |
char *new_string, *current; |
353 |
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354 |
new_string= malloc((strlen(old_string)*2)+4); |
new_string= malloc((strlen(old_string)*2)+4); |
355 |
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assert(new_string != NULL); |
356 |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
357 |
current= new_string+3; |
current= new_string+3; |
358 |
|
|
359 |
while(old_string[0] != '\0'){ |
while(old_string[0] != '\0'){ |
360 |
current[0]= validchars[(unsigned char)(old_string[0])/16]; |
current[0]= validchars[(unsigned char)(old_string[0])/16]; |
361 |
current[1]= validchars[(unsigned char)(old_string[0])%16]; |
current[1]= validchars[(unsigned char)(old_string[0])%16]; |
367 |
return new_string; /* The caller must free() it */ |
return new_string; /* The caller must free() it */ |
368 |
} |
} |
369 |
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extern void mangle(environment *env){ |
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char *new_string; |
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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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if(env->head->item->type!=string) { |
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printerr("Bad Argument Type"); |
|
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env->err= 2; |
|
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return; |
|
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} |
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new_string= mangle_str((const char *)(env->head->item->content.ptr)); |
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toss(env); |
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if(env->err) return; |
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push_cstring(env, new_string); |
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} |
|
370 |
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|
371 |
/* Push a symbol onto the stack. */ |
/* Push a symbol onto the stack. */ |
372 |
void push_sym(environment *env, const char *in_string) |
void push_sym(environment *env, const char *in_string) |
384 |
char *mangled; /* Mangled function name */ |
char *mangled; /* Mangled function name */ |
385 |
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|
386 |
new_value= new_val(env); |
new_value= new_val(env); |
|
protect(env, new_value); |
|
387 |
new_fvalue= new_val(env); |
new_fvalue= new_val(env); |
|
protect(env, new_fvalue); |
|
388 |
|
|
389 |
/* The new value is a symbol */ |
/* The new value is a symbol */ |
390 |
new_value->type= symb; |
new_value->type= symb; |
391 |
|
|
392 |
/* Look up the symbol name in the hash table */ |
/* Look up the symbol name in the hash table */ |
393 |
new_symbol= hash(env->symbols, in_string); |
new_symbol= hash(env->symbols, in_string); |
394 |
new_value->content.ptr= *new_symbol; |
new_value->content.sym= *new_symbol; |
395 |
|
|
396 |
if(*new_symbol==NULL) { /* If symbol was undefined */ |
if(*new_symbol==NULL) { /* If symbol was undefined */ |
397 |
|
|
398 |
/* Create a new symbol */ |
/* Create a new symbol */ |
399 |
(*new_symbol)= malloc(sizeof(symbol)); |
(*new_symbol)= malloc(sizeof(symbol)); |
400 |
|
assert((*new_symbol) != NULL); |
401 |
(*new_symbol)->val= NULL; /* undefined value */ |
(*new_symbol)->val= NULL; /* undefined value */ |
402 |
(*new_symbol)->next= NULL; |
(*new_symbol)->next= NULL; |
403 |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
404 |
|
assert((*new_symbol)->id != NULL); |
405 |
strcpy((*new_symbol)->id, in_string); |
strcpy((*new_symbol)->id, in_string); |
406 |
|
|
407 |
/* Intern the new symbol in the hash table */ |
/* Intern the new symbol in the hash table */ |
408 |
new_value->content.ptr= *new_symbol; |
new_value->content.sym= *new_symbol; |
409 |
|
|
410 |
/* Try to load the symbol name as an external function, to see if |
/* Try to load the symbol name as an external function, to see if |
411 |
we should bind the symbol to a new function pointer value */ |
we should bind the symbol to a new function pointer value */ |
414 |
|
|
415 |
mangled= mangle_str(in_string); /* mangle the name */ |
mangled= mangle_str(in_string); /* mangle the name */ |
416 |
funcptr= dlsym(handle, mangled); /* and try to find it */ |
funcptr= dlsym(handle, mangled); /* and try to find it */ |
417 |
free(mangled); |
|
418 |
dlerr= dlerror(); |
dlerr= dlerror(); |
419 |
if(dlerr != NULL) { /* If no function was found */ |
if(dlerr != NULL) { /* If no function was found */ |
420 |
funcptr= dlsym(handle, in_string); /* Get function pointer */ |
funcptr= dlsym(handle, in_string); /* Get function pointer */ |
421 |
dlerr= dlerror(); |
dlerr= dlerror(); |
422 |
} |
} |
423 |
|
|
424 |
if(dlerr==NULL) { /* If a function was found */ |
if(dlerr==NULL) { /* If a function was found */ |
425 |
new_fvalue->type= func; /* The new value is a function pointer */ |
new_fvalue->type= func; /* The new value is a function pointer */ |
426 |
new_fvalue->content.ptr= funcptr; /* Store function pointer */ |
new_fvalue->content.func= funcptr; /* Store function pointer */ |
427 |
(*new_symbol)->val= new_fvalue; /* Bind the symbol to the new |
(*new_symbol)->val= new_fvalue; /* Bind the symbol to the new |
428 |
function value */ |
function value */ |
429 |
} |
} |
430 |
|
|
431 |
|
free(mangled); |
432 |
} |
} |
|
push_val(env, new_value); |
|
|
unprotect(env); unprotect(env); |
|
|
} |
|
433 |
|
|
434 |
/* Print newline. */ |
push_val(env, new_value); |
|
extern void nl() |
|
|
{ |
|
|
printf("\n"); |
|
435 |
} |
} |
436 |
|
|
|
/* Gets the type of a value */ |
|
|
extern void type(environment *env){ |
|
|
int typenum; |
|
437 |
|
|
438 |
if((env->head)==NULL) { |
/* Print a value */ |
439 |
printerr("Too Few Arguments"); |
void print_val(environment *env, value *val, int noquote, stackitem *stack, |
440 |
env->err=1; |
FILE *stream) |
441 |
return; |
{ |
442 |
} |
stackitem *titem, *tstack; |
443 |
typenum=env->head->item->type; |
int depth; |
444 |
toss(env); |
|
445 |
switch(typenum){ |
switch(val->type) { |
446 |
case integer: |
case empty: |
447 |
push_sym(env, "integer"); |
if(fprintf(stream, "[]") < 0){ |
448 |
break; |
perror("print_val"); |
449 |
case tfloat: |
env->err= 5; |
450 |
push_sym(env, "float"); |
return; |
451 |
break; |
} |
|
case string: |
|
|
push_sym(env, "string"); |
|
|
break; |
|
|
case symb: |
|
|
push_sym(env, "symbol"); |
|
|
break; |
|
|
case func: |
|
|
push_sym(env, "function"); |
|
452 |
break; |
break; |
453 |
case list: |
case unknown: |
454 |
push_sym(env, "list"); |
if(fprintf(stream, "UNKNOWN") < 0){ |
455 |
|
perror("print_val"); |
456 |
|
env->err= 5; |
457 |
|
return; |
458 |
|
} |
459 |
break; |
break; |
|
} |
|
|
} |
|
|
|
|
|
/* Prints the top element of the stack. */ |
|
|
void print_h(stackitem *stack_head, int noquote) |
|
|
{ |
|
|
switch(stack_head->item->type) { |
|
460 |
case integer: |
case integer: |
461 |
printf("%d", stack_head->item->content.i); |
if(fprintf(stream, "%d", val->content.i) < 0){ |
462 |
|
perror("print_val"); |
463 |
|
env->err= 5; |
464 |
|
return; |
465 |
|
} |
466 |
break; |
break; |
467 |
case tfloat: |
case tfloat: |
468 |
printf("%f", stack_head->item->content.f); |
if(fprintf(stream, "%f", val->content.f) < 0){ |
469 |
|
perror("print_val"); |
470 |
|
env->err= 5; |
471 |
|
return; |
472 |
|
} |
473 |
break; |
break; |
474 |
case string: |
case string: |
475 |
if(noquote) |
if(noquote){ |
476 |
printf("%s", (char*)stack_head->item->content.ptr); |
if(fprintf(stream, "%s", val->content.string) < 0){ |
477 |
else |
perror("print_val"); |
478 |
printf("\"%s\"", (char*)stack_head->item->content.ptr); |
env->err= 5; |
479 |
|
return; |
480 |
|
} |
481 |
|
} else { /* quote */ |
482 |
|
if(fprintf(stream, "\"%s\"", val->content.string) < 0){ |
483 |
|
perror("print_val"); |
484 |
|
env->err= 5; |
485 |
|
return; |
486 |
|
} |
487 |
|
} |
488 |
break; |
break; |
489 |
case symb: |
case symb: |
490 |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
if(fprintf(stream, "%s", val->content.sym->id) < 0){ |
491 |
|
perror("print_val"); |
492 |
|
env->err= 5; |
493 |
|
return; |
494 |
|
} |
495 |
break; |
break; |
496 |
case func: |
case func: |
497 |
printf("#<function %p>", (funcp)(stack_head->item->content.ptr)); |
if(fprintf(stream, "#<function %p>", val->content.func) < 0){ |
498 |
|
perror("print_val"); |
499 |
|
env->err= 5; |
500 |
|
return; |
501 |
|
} |
502 |
break; |
break; |
503 |
case list: |
case port: |
504 |
/* A list is just a stack, so make stack_head point to it */ |
if(fprintf(stream, "#<port %p>", val->content.p) < 0){ |
505 |
stack_head=(stackitem *)(stack_head->item->content.ptr); |
perror("print_val"); |
506 |
printf("[ "); |
env->err= 5; |
507 |
while(stack_head != NULL) { |
return; |
|
print_h(stack_head, noquote); |
|
|
printf(" "); |
|
|
stack_head=stack_head->next; |
|
508 |
} |
} |
|
printf("]"); |
|
509 |
break; |
break; |
510 |
} |
case tcons: |
511 |
} |
if(fprintf(stream, "[ ") < 0){ |
512 |
|
perror("print_val"); |
513 |
|
env->err= 5; |
514 |
|
return; |
515 |
|
} |
516 |
|
tstack= stack; |
517 |
|
|
518 |
extern void print_(environment *env) { |
do { |
519 |
if(env->head==NULL) { |
titem=malloc(sizeof(stackitem)); |
520 |
printerr("Too Few Arguments"); |
assert(titem != NULL); |
521 |
env->err=1; |
titem->item=val; |
522 |
return; |
titem->next=tstack; |
523 |
} |
tstack=titem; /* Put it on the stack */ |
524 |
print_h(env->head, 0); |
/* Search a stack of values being printed to see if we are already |
525 |
nl(); |
printing this value */ |
526 |
} |
titem=tstack; |
527 |
|
depth=0; |
528 |
|
|
529 |
|
while(titem != NULL && titem->item != CAR(val)){ |
530 |
|
titem=titem->next; |
531 |
|
depth++; |
532 |
|
} |
533 |
|
|
534 |
/* Prints the top element of the stack and then discards it. */ |
if(titem != NULL){ /* If we found it on the stack, */ |
535 |
extern void print(environment *env) |
if(fprintf(stream, "#%d#", depth) < 0){ /* print a depth reference */ |
536 |
{ |
perror("print_val"); |
537 |
print_(env); |
env->err= 5; |
538 |
if(env->err) return; |
free(titem); |
539 |
toss(env); |
return; |
540 |
} |
} |
541 |
|
} else { |
542 |
|
print_val(env, CAR(val), noquote, tstack, stream); |
543 |
|
} |
544 |
|
|
545 |
extern void princ_(environment *env) { |
val= CDR(val); |
546 |
if(env->head==NULL) { |
switch(val->type){ |
547 |
printerr("Too Few Arguments"); |
case empty: |
548 |
env->err=1; |
break; |
549 |
return; |
case tcons: |
550 |
} |
/* Search a stack of values being printed to see if we are already |
551 |
print_h(env->head, 1); |
printing this value */ |
552 |
} |
titem=tstack; |
553 |
|
depth=0; |
554 |
|
|
555 |
|
while(titem != NULL && titem->item != val){ |
556 |
|
titem=titem->next; |
557 |
|
depth++; |
558 |
|
} |
559 |
|
if(titem != NULL){ /* If we found it on the stack, */ |
560 |
|
if(fprintf(stream, " . #%d#", depth) < 0){ /* print a depth reference */ |
561 |
|
perror("print_val"); |
562 |
|
env->err= 5; |
563 |
|
goto printval_end; |
564 |
|
} |
565 |
|
} else { |
566 |
|
if(fprintf(stream, " ") < 0){ |
567 |
|
perror("print_val"); |
568 |
|
env->err= 5; |
569 |
|
goto printval_end; |
570 |
|
} |
571 |
|
} |
572 |
|
break; |
573 |
|
default: |
574 |
|
if(fprintf(stream, " . ") < 0){ /* Improper list */ |
575 |
|
perror("print_val"); |
576 |
|
env->err= 5; |
577 |
|
goto printval_end; |
578 |
|
} |
579 |
|
print_val(env, val, noquote, tstack, stream); |
580 |
|
} |
581 |
|
} while(val->type == tcons && titem == NULL); |
582 |
|
|
583 |
/* 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); |
|
|
} |
|
584 |
|
|
585 |
/* Only to be called by function printstack. */ |
titem=tstack; |
586 |
void print_st(stackitem *stack_head, long counter) |
while(titem != stack){ |
587 |
{ |
tstack=titem->next; |
588 |
if(stack_head->next != NULL) |
free(titem); |
589 |
print_st(stack_head->next, counter+1); |
titem=tstack; |
590 |
printf("%ld: ", counter); |
} |
|
print_h(stack_head, 0); |
|
|
nl(); |
|
|
} |
|
591 |
|
|
592 |
/* Prints the stack. */ |
if(! (env->err)){ |
593 |
extern void printstack(environment *env) |
if(fprintf(stream, " ]") < 0){ |
594 |
{ |
perror("print_val"); |
595 |
if(env->head == NULL) { |
env->err= 5; |
596 |
printf("Stack Empty\n"); |
} |
597 |
return; |
} |
598 |
|
break; |
599 |
} |
} |
|
print_st(env->head, 1); |
|
600 |
} |
} |
601 |
|
|
602 |
|
|
603 |
/* Swap the two top elements on the stack. */ |
/* Swap the two top elements on the stack. */ |
604 |
extern void swap(environment *env) |
extern void swap(environment *env) |
605 |
{ |
{ |
606 |
stackitem *temp= env->head; |
value *temp= env->head; |
|
|
|
|
if(env->head==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
env->head= env->head->next; |
|
|
temp->next= env->head->next; |
|
|
env->head->next= temp; |
|
|
} |
|
607 |
|
|
608 |
/* Rotate the first three elements on the stack. */ |
if(check_args(env, unknown, unknown, empty)) |
609 |
extern void rot(environment *env) |
return printerr(env); |
|
{ |
|
|
stackitem *temp= env->head; |
|
610 |
|
|
611 |
if(env->head==NULL || env->head->next==NULL |
env->head= CDR(env->head); |
612 |
|| env->head->next->next==NULL) { |
CDR(temp)= CDR(env->head); |
613 |
printerr("Too Few Arguments"); |
CDR(env->head)= temp; |
614 |
env->err=1; |
} |
|
return; |
|
|
} |
|
615 |
|
|
|
env->head= env->head->next->next; |
|
|
temp->next->next= env->head->next; |
|
|
env->head->next= temp; |
|
|
} |
|
616 |
|
|
617 |
/* Recall a value from a symbol, if bound */ |
/* Recall a value from a symbol, if bound */ |
618 |
extern void rcl(environment *env) |
extern void rcl(environment *env) |
619 |
{ |
{ |
620 |
value *val; |
value *val; |
621 |
|
|
622 |
if(env->head == NULL) { |
if(check_args(env, symb, empty)) |
623 |
printerr("Too Few Arguments"); |
return printerr(env); |
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type!=symb) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
|
} |
|
624 |
|
|
625 |
val=((symbol *)(env->head->item->content.ptr))->val; |
val= CAR(env->head)->content.sym->val; |
626 |
if(val == NULL){ |
if(val == NULL){ |
627 |
printerr("Unbound Variable"); |
env->err= 3; |
628 |
env->err=3; |
return printerr(env); |
|
return; |
|
629 |
} |
} |
630 |
protect(env, val); |
|
631 |
toss(env); /* toss the symbol */ |
push_val(env, val); /* Return the symbol's bound value */ |
632 |
|
swap(env); |
633 |
if(env->err) return; |
if(env->err) return; |
634 |
push_val(env, val); /* Return its bound value */ |
env->head= CDR(env->head); |
|
unprotect(env); |
|
635 |
} |
} |
636 |
|
|
637 |
|
|
638 |
/* 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 |
639 |
function value, and if it is, toss the symbol and execute the |
function value, and if it is, toss the symbol and execute the |
640 |
function. */ |
function. */ |
642 |
{ |
{ |
643 |
funcp in_func; |
funcp in_func; |
644 |
value* temp_val; |
value* temp_val; |
645 |
stackitem* iterator; |
value* iterator; |
646 |
|
|
647 |
eval_start: |
eval_start: |
648 |
|
|
649 |
if(env->head==NULL) { |
gc_maybe(env); |
650 |
printerr("Too Few Arguments"); |
|
651 |
env->err=1; |
if(check_args(env, unknown, empty)) |
652 |
return; |
return printerr(env); |
|
} |
|
653 |
|
|
654 |
switch(env->head->item->type) { |
switch(CAR(env->head)->type) { |
655 |
/* if it's a symbol */ |
/* if it's a symbol */ |
656 |
case symb: |
case symb: |
657 |
|
env->errsymb= CAR(env->head)->content.sym->id; |
658 |
rcl(env); /* get its contents */ |
rcl(env); /* get its contents */ |
659 |
if(env->err) return; |
if(env->err) return; |
660 |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
if(CAR(env->head)->type!=symb){ /* don't recurse symbols */ |
661 |
goto eval_start; |
goto eval_start; |
662 |
} |
} |
663 |
return; |
return; |
664 |
|
|
665 |
/* If it's a lone function value, run it */ |
/* If it's a lone function value, run it */ |
666 |
case func: |
case func: |
667 |
in_func= (funcp)(env->head->item->content.ptr); |
in_func= CAR(env->head)->content.func; |
668 |
toss(env); |
env->head= CDR(env->head); |
669 |
if(env->err) return; |
return in_func((void*)env); |
|
return in_func(env); |
|
670 |
|
|
671 |
/* If it's a list */ |
/* If it's a list */ |
672 |
case list: |
case tcons: |
673 |
temp_val= env->head->item; |
temp_val= CAR(env->head); |
674 |
protect(env, temp_val); |
protect(temp_val); |
675 |
|
|
676 |
toss(env); if(env->err) return; |
env->head= CDR(env->head); |
677 |
iterator= (stackitem*)temp_val->content.ptr; |
iterator= temp_val; |
678 |
|
|
679 |
while(iterator!=NULL) { |
while(iterator->type != empty) { |
680 |
push_val(env, iterator->item); |
push_val(env, CAR(iterator)); |
681 |
|
|
682 |
if(env->head->item->type==symb |
if(CAR(env->head)->type==symb |
683 |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
&& CAR(env->head)->content.sym->id[0]==';') { |
684 |
toss(env); |
env->head= CDR(env->head); |
|
if(env->err) return; |
|
685 |
|
|
686 |
if(iterator->next == NULL){ |
if(CDR(iterator)->type == empty){ |
687 |
goto eval_start; |
goto eval_start; |
688 |
} |
} |
689 |
eval(env); |
eval(env); |
690 |
if(env->err) return; |
if(env->err) return; |
691 |
} |
} |
692 |
iterator= iterator->next; |
if (CDR(iterator)->type == empty || CDR(iterator)->type == tcons) |
693 |
|
iterator= CDR(iterator); |
694 |
|
else { |
695 |
|
env->err= 2; /* Improper list */ |
696 |
|
return printerr(env); |
697 |
|
} |
698 |
} |
} |
699 |
unprotect(env); |
unprotect(temp_val); |
|
return; |
|
|
|
|
|
default: |
|
|
return; |
|
|
} |
|
|
} |
|
|
|
|
|
/* Reverse (flip) a list */ |
|
|
extern void rev(environment *env){ |
|
|
stackitem *old_head, *new_head, *item; |
|
|
|
|
|
if((env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type!=list) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
old_head= (stackitem *)(env->head->item->content.ptr); |
|
|
new_head= NULL; |
|
|
while(old_head != NULL){ |
|
|
item= old_head; |
|
|
old_head= old_head->next; |
|
|
item->next= new_head; |
|
|
new_head= item; |
|
|
} |
|
|
env->head->item->content.ptr= new_head; |
|
|
} |
|
|
|
|
|
/* Make a list. */ |
|
|
extern void pack(environment *env) |
|
|
{ |
|
|
stackitem *iterator, *temp; |
|
|
value *pack; |
|
|
|
|
|
iterator= env->head; |
|
|
pack= new_val(env); |
|
|
protect(env, pack); |
|
|
|
|
|
if(iterator==NULL |
|
|
|| (iterator->item->type==symb |
|
|
&& ((symbol*)(iterator->item->content.ptr))->id[0]=='[')) { |
|
|
temp= NULL; |
|
|
toss(env); |
|
|
} else { |
|
|
/* Search for first delimiter */ |
|
|
while(iterator->next!=NULL |
|
|
&& (iterator->next->item->type!=symb |
|
|
|| ((symbol*)(iterator->next->item->content.ptr))->id[0]!='[')) |
|
|
iterator= iterator->next; |
|
|
|
|
|
/* Extract list */ |
|
|
temp= env->head; |
|
|
env->head= iterator->next; |
|
|
iterator->next= NULL; |
|
|
|
|
|
pack->type= list; |
|
|
pack->content.ptr= temp; |
|
|
|
|
|
if(env->head!=NULL) |
|
|
toss(env); |
|
|
} |
|
|
|
|
|
/* Push list */ |
|
|
|
|
|
push_val(env, pack); |
|
|
rev(env); |
|
|
|
|
|
unprotect(env); |
|
|
} |
|
|
|
|
|
/* Relocate elements of the list on the stack. */ |
|
|
extern void expand(environment *env) |
|
|
{ |
|
|
stackitem *temp, *new_head; |
|
|
|
|
|
/* Is top element a list? */ |
|
|
if(env->head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
700 |
return; |
return; |
|
} |
|
|
if(env->head->item->type!=list) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
rev(env); |
|
|
|
|
|
if(env->err) |
|
|
return; |
|
|
|
|
|
/* The first list element is the new stack head */ |
|
|
new_head= temp= env->head->item->content.ptr; |
|
|
|
|
|
toss(env); |
|
|
|
|
|
/* Find the end of the list */ |
|
|
while(temp->next!=NULL) |
|
|
temp= temp->next; |
|
|
|
|
|
/* Connect the tail of the list with the old stack head */ |
|
|
temp->next= env->head; |
|
|
env->head= new_head; /* ...and voila! */ |
|
|
|
|
|
} |
|
|
|
|
|
/* Compares two elements by reference. */ |
|
|
extern void eq(environment *env) |
|
|
{ |
|
|
void *left, *right; |
|
|
int result; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
701 |
|
|
702 |
left= env->head->item->content.ptr; |
case empty: |
703 |
swap(env); |
env->head= CDR(env->head); |
704 |
right= env->head->item->content.ptr; |
case integer: |
705 |
result= (left==right); |
case tfloat: |
706 |
|
case string: |
707 |
toss(env); toss(env); |
case port: |
708 |
push_int(env, result); |
case unknown: |
|
} |
|
|
|
|
|
/* 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(env->head->item->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
709 |
return; |
return; |
710 |
} |
} |
|
|
|
|
val= env->head->item->content.i; |
|
|
toss(env); |
|
|
push_int(env, !val); |
|
711 |
} |
} |
712 |
|
|
|
/* 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 || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type!=symb) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
/* long names are a pain */ |
|
|
sym= env->head->item->content.ptr; |
|
|
|
|
|
/* Bind the symbol to the value */ |
|
|
sym->val= env->head->next->item; |
|
|
|
|
|
toss(env); toss(env); |
|
|
} |
|
|
|
|
|
/* Quit stack. */ |
|
|
extern void quit(environment *env) |
|
|
{ |
|
|
long i; |
|
|
|
|
|
clear(env); |
|
|
|
|
|
if (env->err) return; |
|
|
for(i= 0; i<HASHTBLSIZE; i++) { |
|
|
while(env->symbols[i]!= NULL) { |
|
|
forget_sym(&(env->symbols[i])); |
|
|
} |
|
|
env->symbols[i]= NULL; |
|
|
} |
|
|
|
|
|
env->gc_limit= 0; |
|
|
gc_init(env); |
|
|
|
|
|
if(env->free_string!=NULL) |
|
|
free(env->free_string); |
|
|
|
|
|
muntrace(); |
|
|
|
|
|
exit(EXIT_SUCCESS); |
|
|
} |
|
|
|
|
|
/* 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; |
|
|
} |
|
|
} |
|
|
} |
|
713 |
|
|
714 |
/* Internal forget function */ |
/* Internal forget function */ |
715 |
void forget_sym(symbol **hash_entry) { |
void forget_sym(symbol **hash_entry) |
716 |
|
{ |
717 |
symbol *temp; |
symbol *temp; |
718 |
|
|
719 |
temp= *hash_entry; |
temp= *hash_entry; |
723 |
free(temp); |
free(temp); |
724 |
} |
} |
725 |
|
|
|
/* Forgets a symbol (remove it from the hash table) */ |
|
|
extern void forget(environment *env) |
|
|
{ |
|
|
char* sym_id; |
|
|
stackitem *stack_head= env->head; |
|
|
|
|
|
if(stack_head==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(stack_head->item->type!=symb) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
|
} |
|
|
|
|
|
sym_id= ((symbol*)(stack_head->item->content.ptr))->id; |
|
|
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); |
|
|
} |
|
726 |
|
|
727 |
int main(int argc, char **argv) |
int main(int argc, char **argv) |
728 |
{ |
{ |
729 |
environment myenv; |
environment myenv; |
|
|
|
730 |
int c; /* getopt option character */ |
int c; /* getopt option character */ |
731 |
|
|
732 |
|
#ifdef __linux__ |
733 |
mtrace(); |
mtrace(); |
734 |
|
#endif |
735 |
|
|
736 |
init_env(&myenv); |
init_env(&myenv); |
737 |
|
|
745 |
break; |
break; |
746 |
case '?': |
case '?': |
747 |
fprintf (stderr, |
fprintf (stderr, |
748 |
"Unknown option character `\\x%x'.\n", |
"Unknown option character '\\x%x'.\n", |
749 |
optopt); |
optopt); |
750 |
return EX_USAGE; |
return EX_USAGE; |
751 |
default: |
default: |
761 |
} |
} |
762 |
} |
} |
763 |
|
|
764 |
if(myenv.interactive) { |
if(myenv.interactive) |
765 |
printf("Stack version $Revision$\n\ |
puts(start_message); |
|
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
|
|
Stack comes with ABSOLUTELY NO WARRANTY; for details type `warranty;'.\n\ |
|
|
This is free software, and you are welcome to redistribute it\n\ |
|
|
under certain conditions; type `copying;' for details.\n"); |
|
|
} |
|
766 |
|
|
767 |
while(1) { |
while(1) { |
768 |
if(myenv.in_string==NULL) { |
if(myenv.in_string==NULL) { |
769 |
if (myenv.interactive) { |
if (myenv.interactive) { |
770 |
if(myenv.err) { |
if(myenv.err) { |
771 |
printf("(error %d)\n", myenv.err); |
printf("(error %d)\n", myenv.err); |
772 |
|
myenv.err= 0; |
773 |
} |
} |
774 |
nl(); |
printf("\n"); |
775 |
printstack(&myenv); |
printstack(&myenv); |
776 |
printf("> "); |
printf("> "); |
777 |
} |
} |
778 |
myenv.err=0; |
myenv.err=0; |
779 |
} |
} |
780 |
sx_72656164(&myenv); |
readstream(&myenv, myenv.inputstream); |
781 |
if (myenv.err==4) { |
if (myenv.err) { /* EOF or other error */ |
782 |
return EXIT_SUCCESS; /* EOF */ |
myenv.err=0; |
783 |
} else if(myenv.head!=NULL |
quit(&myenv); |
784 |
&& myenv.head->item->type==symb |
} else if(myenv.head->type!=empty |
785 |
&& ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { |
&& CAR(myenv.head)->type==symb |
786 |
toss(&myenv); /* No error check in main */ |
&& CAR(myenv.head)->content.sym->id[0] == ';') { |
787 |
|
if(myenv.head->type != empty) |
788 |
|
myenv.head= CDR(myenv.head); |
789 |
eval(&myenv); |
eval(&myenv); |
790 |
|
} else { |
791 |
|
gc_maybe(&myenv); |
792 |
} |
} |
|
gc_init(&myenv); |
|
793 |
} |
} |
794 |
quit(&myenv); |
quit(&myenv); |
795 |
return EXIT_FAILURE; |
return EXIT_FAILURE; |
796 |
} |
} |
797 |
|
|
|
/* "+" */ |
|
|
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 || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==string |
|
|
&& env->head->next->item->type==string) { |
|
|
a_val= env->head->item; |
|
|
b_val= env->head->next->item; |
|
|
protect(env, a_val); protect(env, 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(env); unprotect(env); |
|
|
free(new_string); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b+a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb+fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==integer) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b+fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->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 || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b-a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb-fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==integer) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b-fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->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 || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b>a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, fb>fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==integer) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b>fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->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); |
|
|
} |
|
798 |
|
|
799 |
/* Return copy of a value */ |
/* Return copy of a value */ |
800 |
value *copy_val(environment *env, value *old_value){ |
value *copy_val(environment *env, value *old_value) |
801 |
stackitem *old_item, *new_item, *prev_item; |
{ |
802 |
value *new_value; |
value *new_value; |
803 |
|
|
804 |
protect(env, old_value); |
if(old_value==NULL) |
805 |
|
return NULL; |
806 |
|
|
807 |
new_value= new_val(env); |
new_value= new_val(env); |
|
protect(env, new_value); |
|
808 |
new_value->type= old_value->type; |
new_value->type= old_value->type; |
809 |
|
|
810 |
switch(old_value->type){ |
switch(old_value->type){ |
812 |
case integer: |
case integer: |
813 |
case func: |
case func: |
814 |
case symb: |
case symb: |
815 |
|
case empty: |
816 |
|
case unknown: |
817 |
|
case port: |
818 |
new_value->content= old_value->content; |
new_value->content= old_value->content; |
819 |
break; |
break; |
820 |
case string: |
case string: |
821 |
(char *)(new_value->content.ptr)= |
new_value->content.string= strdup(old_value->content.string); |
|
strdup((char *)(old_value->content.ptr)); |
|
822 |
break; |
break; |
823 |
case list: |
case tcons: |
|
new_value->content.ptr= NULL; |
|
824 |
|
|
825 |
prev_item= NULL; |
new_value->content.c= malloc(sizeof(pair)); |
826 |
old_item= (stackitem*)(old_value->content.ptr); |
assert(new_value->content.c!=NULL); |
827 |
|
env->gc_count += sizeof(pair); |
828 |
|
|
829 |
while(old_item != NULL) { /* While list is not empty */ |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
830 |
new_item= malloc(sizeof(stackitem)); |
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
|
new_item->item= copy_val(env, old_item->item); /* recurse */ |
|
|
new_item->next= NULL; |
|
|
if(prev_item != NULL) /* If this wasn't the first item */ |
|
|
prev_item->next= new_item; /* point the previous item to the |
|
|
new item */ |
|
|
else |
|
|
new_value->content.ptr= new_item; |
|
|
old_item= old_item->next; |
|
|
prev_item= new_item; |
|
|
} |
|
831 |
break; |
break; |
832 |
} |
} |
833 |
|
|
|
unprotect(env); unprotect(env); |
|
|
|
|
834 |
return new_value; |
return new_value; |
835 |
} |
} |
836 |
|
|
|
/* "dup"; duplicates an item on the stack */ |
|
|
extern void sx_647570(environment *env) { |
|
|
if((env->head)==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
push_val(env, copy_val(env, env->head->item)); |
|
|
} |
|
|
|
|
|
/* "if", If-Then */ |
|
|
extern void sx_6966(environment *env) { |
|
837 |
|
|
838 |
int truth; |
/* read a line from a stream; used by readline */ |
839 |
|
void readlinestream(environment *env, FILE *stream) |
840 |
if((env->head)==NULL || env->head->next==NULL) { |
{ |
841 |
printerr("Too Few Arguments"); |
char in_string[101]; |
|
env->err= 1; |
|
|
return; |
|
|
} |
|
842 |
|
|
843 |
if(env->head->next->item->type != integer) { |
if(fgets(in_string, 100, stream)==NULL) { |
844 |
printerr("Bad Argument Type"); |
push_cstring(env, ""); |
845 |
env->err=2; |
if (! feof(stream)){ |
846 |
return; |
perror("readline"); |
847 |
|
env->err= 5; |
848 |
|
} |
849 |
|
} else { |
850 |
|
push_cstring(env, in_string); |
851 |
} |
} |
|
|
|
|
swap(env); |
|
|
if(env->err) return; |
|
|
|
|
|
truth=env->head->item->content.i; |
|
|
|
|
|
toss(env); |
|
|
if(env->err) return; |
|
|
|
|
|
if(truth) |
|
|
eval(env); |
|
|
else |
|
|
toss(env); |
|
852 |
} |
} |
853 |
|
|
|
/* If-Then-Else */ |
|
|
extern void ifelse(environment *env) { |
|
|
|
|
|
int truth; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL |
|
|
|| env->head->next->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->next->next->item->type != integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
|
} |
|
|
|
|
|
rot(env); |
|
|
if(env->err) return; |
|
|
|
|
|
truth=env->head->item->content.i; |
|
|
|
|
|
toss(env); |
|
|
if(env->err) return; |
|
854 |
|
|
855 |
if(!truth) |
/* Reverse (flip) a list */ |
856 |
swap(env); |
extern void rev(environment *env) |
857 |
if(env->err) return; |
{ |
858 |
|
value *old_head, *new_head, *item; |
|
toss(env); |
|
|
if(env->err) return; |
|
|
|
|
|
eval(env); |
|
|
} |
|
859 |
|
|
860 |
/* "while" */ |
if(CAR(env->head)->type==empty) |
861 |
extern void sx_7768696c65(environment *env) { |
return; /* Don't reverse an empty list */ |
862 |
|
|
863 |
int truth; |
if(check_args(env, tcons, empty)) |
864 |
value *loop, *test; |
return printerr(env); |
865 |
|
|
866 |
if((env->head)==NULL || env->head->next==NULL) { |
old_head= CAR(env->head); |
867 |
printerr("Too Few Arguments"); |
new_head= new_val(env); |
868 |
env->err=1; |
while(old_head->type != empty) { |
869 |
return; |
item= old_head; |
870 |
|
old_head= CDR(old_head); |
871 |
|
CDR(item)= new_head; |
872 |
|
new_head= item; |
873 |
} |
} |
874 |
|
CAR(env->head)= new_head; |
|
loop= env->head->item; |
|
|
protect(env, loop); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
test= env->head->item; |
|
|
protect(env, test); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
do { |
|
|
push_val(env, test); |
|
|
eval(env); |
|
|
|
|
|
if(env->head->item->type != integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
truth= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
if(truth) { |
|
|
push_val(env, loop); |
|
|
eval(env); |
|
|
} else { |
|
|
toss(env); |
|
|
} |
|
|
|
|
|
} while(truth); |
|
|
|
|
|
unprotect(env); unprotect(env); |
|
875 |
} |
} |
876 |
|
|
877 |
|
|
878 |
/* "for"; for-loop */ |
/* Make a list. */ |
879 |
extern void sx_666f72(environment *env) { |
extern void pack(environment *env) |
880 |
value *loop; |
{ |
881 |
int foo1, foo2; |
value *iterator, *temp, *ending; |
|
|
|
|
if(env->head==NULL || env->head->next==NULL |
|
|
|| env->head->next->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
882 |
|
|
883 |
if(env->head->next->item->type!=integer |
ending=new_val(env); |
|
|| env->head->next->next->item->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
884 |
|
|
885 |
loop= env->head->item; |
iterator= env->head; |
886 |
protect(env, loop); |
if(iterator->type == empty |
887 |
toss(env); if(env->err) return; |
|| (CAR(iterator)->type==symb |
888 |
|
&& CAR(iterator)->content.sym->id[0]=='[')) { |
889 |
foo2= env->head->item->content.i; |
temp= ending; |
890 |
toss(env); if(env->err) return; |
if(env->head->type != empty) |
891 |
|
env->head= CDR(env->head); |
|
foo1= env->head->item->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++; |
|
|
} |
|
892 |
} else { |
} else { |
893 |
while(foo1>=foo2) { |
/* Search for first delimiter */ |
894 |
push_int(env, foo1); |
while(CDR(iterator)->type != empty |
895 |
push_val(env, loop); |
&& (CAR(CDR(iterator))->type!=symb |
896 |
eval(env); if(env->err) return; |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
897 |
foo1--; |
iterator= CDR(iterator); |
898 |
} |
|
899 |
} |
/* Extract list */ |
900 |
unprotect(env); |
temp= env->head; |
901 |
} |
env->head= CDR(iterator); |
902 |
|
CDR(iterator)= ending; |
|
/* Variant of for-loop */ |
|
|
extern void foreach(environment *env) { |
|
|
|
|
|
value *loop, *foo; |
|
|
stackitem *iterator; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err= 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->next->item->type != list) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err= 2; |
|
|
return; |
|
|
} |
|
|
|
|
|
loop= env->head->item; |
|
|
protect(env, loop); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
foo= env->head->item; |
|
|
protect(env, foo); |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
iterator= foo->content.ptr; |
|
|
|
|
|
while(iterator!=NULL) { |
|
|
push_val(env, iterator->item); |
|
|
push_val(env, loop); |
|
|
eval(env); if(env->err) return; |
|
|
iterator= iterator->next; |
|
|
} |
|
|
unprotect(env); unprotect(env); |
|
|
} |
|
|
|
|
|
/* "to" */ |
|
|
extern void to(environment *env) { |
|
|
int i, start, ending; |
|
|
stackitem *temp_head; |
|
|
value *temp_val; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
903 |
|
|
904 |
if(env->head->item->type!=integer |
if(env->head->type != empty) |
905 |
|| env->head->next->item->type!=integer) { |
env->head= CDR(env->head); |
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
906 |
} |
} |
907 |
|
|
908 |
ending= env->head->item->content.i; |
/* Push list */ |
|
toss(env); if(env->err) return; |
|
|
start= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
|
|
|
temp_head= env->head; |
|
|
env->head= NULL; |
|
|
|
|
|
if(ending>=start) { |
|
|
for(i= ending; i>=start; i--) |
|
|
push_int(env, i); |
|
|
} else { |
|
|
for(i= ending; i<=start; i++) |
|
|
push_int(env, i); |
|
|
} |
|
|
|
|
|
temp_val= new_val(env); |
|
|
protect(env, temp_val); |
|
|
|
|
|
temp_val->content.ptr= env->head; |
|
|
temp_val->type= list; |
|
|
env->head= temp_head; |
|
|
push_val(env, temp_val); |
|
909 |
|
|
910 |
unprotect(env); |
push_val(env, temp); |
911 |
|
rev(env); |
912 |
} |
} |
913 |
|
|
|
/* Read a string */ |
|
|
extern void readline(environment *env) { |
|
|
char in_string[101]; |
|
914 |
|
|
915 |
if(fgets(in_string, 100, env->inputstream)==NULL) |
/* read from a stream; used by "read" and "readport" */ |
916 |
push_cstring(env, ""); |
void readstream(environment *env, FILE *stream) |
917 |
else |
{ |
|
push_cstring(env, in_string); |
|
|
} |
|
|
|
|
|
/* "read"; Read a value and place on stack */ |
|
|
extern void sx_72656164(environment *env) { |
|
918 |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
919 |
const char strform[]= "\"%[^\"]\"%n"; |
const char strform[]= "\"%[^\"]\"%n"; |
920 |
const char intform[]= "%i%n"; |
const char intform[]= "%i%n"; |
928 |
int count= -1; |
int count= -1; |
929 |
float ftemp; |
float ftemp; |
930 |
static int depth= 0; |
static int depth= 0; |
931 |
char *match, *ctemp; |
char *match; |
932 |
size_t inlength; |
size_t inlength; |
933 |
|
|
934 |
if(env->in_string==NULL) { |
if(env->in_string==NULL) { |
935 |
if(depth > 0 && env->interactive) { |
if(depth > 0 && env->interactive) { |
936 |
printf("]> "); |
printf("]> "); |
937 |
} |
} |
938 |
readline(env); if(env->err) return; |
readlinestream(env, env->inputstream); |
939 |
|
if(env->err) return; |
940 |
|
|
941 |
if(((char *)(env->head->item->content.ptr))[0]=='\0'){ |
if((CAR(env->head)->content.string)[0]=='\0'){ |
942 |
env->err= 4; /* "" means EOF */ |
env->err= 4; /* "" means EOF */ |
943 |
return; |
return; |
944 |
} |
} |
945 |
|
|
946 |
env->in_string= malloc(strlen(env->head->item->content.ptr)+1); |
env->in_string= malloc(strlen(CAR(env->head)->content.string)+1); |
947 |
|
assert(env->in_string != NULL); |
948 |
env->free_string= env->in_string; /* Save the original pointer */ |
env->free_string= env->in_string; /* Save the original pointer */ |
949 |
strcpy(env->in_string, env->head->item->content.ptr); |
strcpy(env->in_string, CAR(env->head)->content.string); |
950 |
toss(env); if(env->err) return; |
env->head= CDR(env->head); |
951 |
} |
} |
952 |
|
|
953 |
inlength= strlen(env->in_string)+1; |
inlength= strlen(env->in_string)+1; |
954 |
match= malloc(inlength); |
match= malloc(inlength); |
955 |
|
assert(match != NULL); |
956 |
|
|
957 |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
958 |
&& readlength != -1) { |
&& readlength != -1) { |
965 |
} else { |
} else { |
966 |
push_float(env, ftemp); |
push_float(env, ftemp); |
967 |
} |
} |
968 |
|
} else if(sscanf(env->in_string, "\"\"%n", &readlength) != EOF |
969 |
|
&& readlength != -1) { |
970 |
|
push_cstring(env, ""); |
971 |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
972 |
&& readlength != -1) { |
&& readlength != -1) { |
973 |
push_cstring(env, match); |
push_cstring(env, match); |
996 |
free(match); |
free(match); |
997 |
|
|
998 |
if(depth) |
if(depth) |
999 |
return sx_72656164(env); |
return readstream(env, env->inputstream); |
1000 |
} |
} |
1001 |
|
|
|
extern void beep(environment *env) { |
|
|
|
|
|
int freq, dur, period, ticks; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type!=integer |
|
|
|| env->head->next->item->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
|
} |
|
|
|
|
|
dur=env->head->item->content.i; |
|
|
toss(env); |
|
|
freq=env->head->item->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(env->head->item->type!=integer) { |
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
return; |
|
|
} |
|
|
|
|
|
dur=env->head->item->content.i; |
|
|
toss(env); |
|
|
|
|
|
usleep(dur); |
|
|
}; |
|
|
|
|
|
extern void copying(environment *env){ |
|
|
printf("GNU GENERAL PUBLIC LICENSE\n\ |
|
|
Version 2, June 1991\n\ |
|
|
\n\ |
|
|
Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ |
|
|
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\n\ |
|
|
Everyone is permitted to copy and distribute verbatim copies\n\ |
|
|
of this license document, but changing it is not allowed.\n\ |
|
|
\n\ |
|
|
Preamble\n\ |
|
|
\n\ |
|
|
The licenses for most software are designed to take away your\n\ |
|
|
freedom to share and change it. By contrast, the GNU General Public\n\ |
|
|
License is intended to guarantee your freedom to share and change free\n\ |
|
|
software--to make sure the software is free for all its users. This\n\ |
|
|
General Public License applies to most of the Free Software\n\ |
|
|
Foundation's software and to any other program whose authors commit to\n\ |
|
|
using it. (Some other Free Software Foundation software is covered by\n\ |
|
|
the GNU Library General Public License instead.) You can apply it to\n\ |
|
|
your programs, too.\n\ |
|
|
\n\ |
|
|
When we speak of free software, we are referring to freedom, not\n\ |
|
|
price. Our General Public Licenses are designed to make sure that you\n\ |
|
|
have the freedom to distribute copies of free software (and charge for\n\ |
|
|
this service if you wish), that you receive source code or can get it\n\ |
|
|
if you want it, that you can change the software or use pieces of it\n\ |
|
|
in new free programs; and that you know you can do these things.\n\ |
|
|
\n\ |
|
|
To protect your rights, we need to make restrictions that forbid\n\ |
|
|
anyone to deny you these rights or to ask you to surrender the rights.\n\ |
|
|
These restrictions translate to certain responsibilities for you if you\n\ |
|
|
distribute copies of the software, or if you modify it.\n\ |
|
|
\n\ |
|
|
For example, if you distribute copies of such a program, whether\n\ |
|
|
gratis or for a fee, you must give the recipients all the rights that\n\ |
|
|
you have. You must make sure that they, too, receive or can get the\n\ |
|
|
source code. And you must show them these terms so they know their\n\ |
|
|
rights.\n\ |
|
|
\n\ |
|
|
We protect your rights with two steps: (1) copyright the software, and\n\ |
|
|
(2) offer you this license which gives you legal permission to copy,\n\ |
|
|
distribute and/or modify the software.\n\ |
|
|
\n\ |
|
|
Also, for each author's protection and ours, we want to make certain\n\ |
|
|
that everyone understands that there is no warranty for this free\n\ |
|
|
software. If the software is modified by someone else and passed on, we\n\ |
|
|
want its recipients to know that what they have is not the original, so\n\ |
|
|
that any problems introduced by others will not reflect on the original\n\ |
|
|
authors' reputations.\n\ |
|
|
\n\ |
|
|
Finally, any free program is threatened constantly by software\n\ |
|
|
patents. We wish to avoid the danger that redistributors of a free\n\ |
|
|
program will individually obtain patent licenses, in effect making the\n\ |
|
|
program proprietary. To prevent this, we have made it clear that any\n\ |
|
|
patent must be licensed for everyone's free use or not licensed at all.\n\ |
|
|
\n\ |
|
|
The precise terms and conditions for copying, distribution and\n\ |
|
|
modification follow.\n\ |
|
|
\n\ |
|
|
GNU GENERAL PUBLIC LICENSE\n\ |
|
|
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION\n\ |
|
|
\n\ |
|
|
0. This License applies to any program or other work which contains\n\ |
|
|
a notice placed by the copyright holder saying it may be distributed\n\ |
|
|
under the terms of this General Public License. The \"Program\", below,\n\ |
|
|
refers to any such program or work, and a \"work based on the Program\"\n\ |
|
|
means either the Program or any derivative work under copyright law:\n\ |
|
|
that is to say, a work containing the Program or a portion of it,\n\ |
|
|
either verbatim or with modifications and/or translated into another\n\ |
|
|
language. (Hereinafter, translation is included without limitation in\n\ |
|
|
the term \"modification\".) Each licensee is addressed as \"you\".\n\ |
|
|
\n\ |
|
|
Activities other than copying, distribution and modification are not\n\ |
|
|
covered by this License; they are outside its scope. The act of\n\ |
|
|
running the Program is not restricted, and the output from the Program\n\ |
|
|
is covered only if its contents constitute a work based on the\n\ |
|
|
Program (independent of having been made by running the Program).\n\ |
|
|
Whether that is true depends on what the Program does.\n\ |
|
|
\n\ |
|
|
1. You may copy and distribute verbatim copies of the Program's\n\ |
|
|
source code as you receive it, in any medium, provided that you\n\ |
|
|
conspicuously and appropriately publish on each copy an appropriate\n\ |
|
|
copyright notice and disclaimer of warranty; keep intact all the\n\ |
|
|
notices that refer to this License and to the absence of any warranty;\n\ |
|
|
and give any other recipients of the Program a copy of this License\n\ |
|
|
along with the Program.\n\ |
|
|
\n\ |
|
|
You may charge a fee for the physical act of transferring a copy, and\n\ |
|
|
you may at your option offer warranty protection in exchange for a fee.\n\ |
|
|
\n\ |
|
|
2. You may modify your copy or copies of the Program or any portion\n\ |
|
|
of it, thus forming a work based on the Program, and copy and\n\ |
|
|
distribute such modifications or work under the terms of Section 1\n\ |
|
|
above, provided that you also meet all of these conditions:\n\ |
|
|
\n\ |
|
|
a) You must cause the modified files to carry prominent notices\n\ |
|
|
stating that you changed the files and the date of any change.\n\ |
|
|
\n\ |
|
|
b) You must cause any work that you distribute or publish, that in\n\ |
|
|
whole or in part contains or is derived from the Program or any\n\ |
|
|
part thereof, to be licensed as a whole at no charge to all third\n\ |
|
|
parties under the terms of this License.\n\ |
|
|
\n\ |
|
|
c) If the modified program normally reads commands interactively\n\ |
|
|
when run, you must cause it, when started running for such\n\ |
|
|
interactive use in the most ordinary way, to print or display an\n\ |
|
|
announcement including an appropriate copyright notice and a\n\ |
|
|
notice that there is no warranty (or else, saying that you provide\n\ |
|
|
a warranty) and that users may redistribute the program under\n\ |
|
|
these conditions, and telling the user how to view a copy of this\n\ |
|
|
License. (Exception: if the Program itself is interactive but\n\ |
|
|
does not normally print such an announcement, your work based on\n\ |
|
|
the Program is not required to print an announcement.)\n\ |
|
|
\n\ |
|
|
These requirements apply to the modified work as a whole. If\n\ |
|
|
identifiable sections of that work are not derived from the Program,\n\ |
|
|
and can be reasonably considered independent and separate works in\n\ |
|
|
themselves, then this License, and its terms, do not apply to those\n\ |
|
|
sections when you distribute them as separate works. But when you\n\ |
|
|
distribute the same sections as part of a whole which is a work based\n\ |
|
|
on the Program, the distribution of the whole must be on the terms of\n\ |
|
|
this License, whose permissions for other licensees extend to the\n\ |
|
|
entire whole, and thus to each and every part regardless of who wrote it.\n\ |
|
|
\n\ |
|
|
Thus, it is not the intent of this section to claim rights or contest\n\ |
|
|
your rights to work written entirely by you; rather, the intent is to\n\ |
|
|
exercise the right to control the distribution of derivative or\n\ |
|
|
collective works based on the Program.\n\ |
|
|
\n\ |
|
|
In addition, mere aggregation of another work not based on the Program\n\ |
|
|
with the Program (or with a work based on the Program) on a volume of\n\ |
|
|
a storage or distribution medium does not bring the other work under\n\ |
|
|
the scope of this License.\n\ |
|
|
\n\ |
|
|
3. You may copy and distribute the Program (or a work based on it,\n\ |
|
|
under Section 2) in object code or executable form under the terms of\n\ |
|
|
Sections 1 and 2 above provided that you also do one of the following:\n\ |
|
|
\n\ |
|
|
a) Accompany it with the complete corresponding machine-readable\n\ |
|
|
source code, which must be distributed under the terms of Sections\n\ |
|
|
1 and 2 above on a medium customarily used for software interchange; or,\n\ |
|
|
\n\ |
|
|
b) Accompany it with a written offer, valid for at least three\n\ |
|
|
years, to give any third party, for a charge no more than your\n\ |
|
|
cost of physically performing source distribution, a complete\n\ |
|
|
machine-readable copy of the corresponding source code, to be\n\ |
|
|
distributed under the terms of Sections 1 and 2 above on a medium\n\ |
|
|
customarily used for software interchange; or,\n\ |
|
|
\n\ |
|
|
c) Accompany it with the information you received as to the offer\n\ |
|
|
to distribute corresponding source code. (This alternative is\n\ |
|
|
allowed only for noncommercial distribution and only if you\n\ |
|
|
received the program in object code or executable form with such\n\ |
|
|
an offer, in accord with Subsection b above.)\n\ |
|
|
\n\ |
|
|
The source code for a work means the preferred form of the work for\n\ |
|
|
making modifications to it. For an executable work, complete source\n\ |
|
|
code means all the source code for all modules it contains, plus any\n\ |
|
|
associated interface definition files, plus the scripts used to\n\ |
|
|
control compilation and installation of the executable. However, as a\n\ |
|
|
special exception, the source code distributed need not include\n\ |
|
|
anything that is normally distributed (in either source or binary\n\ |
|
|
form) with the major components (compiler, kernel, and so on) of the\n\ |
|
|
operating system on which the executable runs, unless that component\n\ |
|
|
itself accompanies the executable.\n\ |
|
|
\n\ |
|
|
If distribution of executable or object code is made by offering\n\ |
|
|
access to copy from a designated place, then offering equivalent\n\ |
|
|
access to copy the source code from the same place counts as\n\ |
|
|
distribution of the source code, even though third parties are not\n\ |
|
|
compelled to copy the source along with the object code.\n\ |
|
|
\n\ |
|
|
4. You may not copy, modify, sublicense, or distribute the Program\n\ |
|
|
except as expressly provided under this License. Any attempt\n\ |
|
|
otherwise to copy, modify, sublicense or distribute the Program is\n\ |
|
|
void, and will automatically terminate your rights under this License.\n\ |
|
|
However, parties who have received copies, or rights, from you under\n\ |
|
|
this License will not have their licenses terminated so long as such\n\ |
|
|
parties remain in full compliance.\n\ |
|
|
\n\ |
|
|
5. You are not required to accept this License, since you have not\n\ |
|
|
signed it. However, nothing else grants you permission to modify or\n\ |
|
|
distribute the Program or its derivative works. These actions are\n\ |
|
|
prohibited by law if you do not accept this License. Therefore, by\n\ |
|
|
modifying or distributing the Program (or any work based on the\n\ |
|
|
Program), you indicate your acceptance of this License to do so, and\n\ |
|
|
all its terms and conditions for copying, distributing or modifying\n\ |
|
|
the Program or works based on it.\n\ |
|
|
\n\ |
|
|
6. Each time you redistribute the Program (or any work based on the\n\ |
|
|
Program), the recipient automatically receives a license from the\n\ |
|
|
original licensor to copy, distribute or modify the Program subject to\n\ |
|
|
these terms and conditions. You may not impose any further\n\ |
|
|
restrictions on the recipients' exercise of the rights granted herein.\n\ |
|
|
You are not responsible for enforcing compliance by third parties to\n\ |
|
|
this License.\n\ |
|
|
\n\ |
|
|
7. If, as a consequence of a court judgment or allegation of patent\n\ |
|
|
infringement or for any other reason (not limited to patent issues),\n\ |
|
|
conditions are imposed on you (whether by court order, agreement or\n\ |
|
|
otherwise) that contradict the conditions of this License, they do not\n\ |
|
|
excuse you from the conditions of this License. If you cannot\n\ |
|
|
distribute so as to satisfy simultaneously your obligations under this\n\ |
|
|
License and any other pertinent obligations, then as a consequence you\n\ |
|
|
may not distribute the Program at all. For example, if a patent\n\ |
|
|
license would not permit royalty-free redistribution of the Program by\n\ |
|
|
all those who receive copies directly or indirectly through you, then\n\ |
|
|
the only way you could satisfy both it and this License would be to\n\ |
|
|
refrain entirely from distribution of the Program.\n\ |
|
|
\n\ |
|
|
If any portion of this section is held invalid or unenforceable under\n\ |
|
|
any particular circumstance, the balance of the section is intended to\n\ |
|
|
apply and the section as a whole is intended to apply in other\n\ |
|
|
circumstances.\n\ |
|
|
\n\ |
|
|
It is not the purpose of this section to induce you to infringe any\n\ |
|
|
patents or other property right claims or to contest validity of any\n\ |
|
|
such claims; this section has the sole purpose of protecting the\n\ |
|
|
integrity of the free software distribution system, which is\n\ |
|
|
implemented by public license practices. Many people have made\n\ |
|
|
generous contributions to the wide range of software distributed\n\ |
|
|
through that system in reliance on consistent application of that\n\ |
|
|
system; it is up to the author/donor to decide if he or she is willing\n\ |
|
|
to distribute software through any other system and a licensee cannot\n\ |
|
|
impose that choice.\n\ |
|
|
\n\ |
|
|
This section is intended to make thoroughly clear what is believed to\n\ |
|
|
be a consequence of the rest of this License.\n\ |
|
|
\n\ |
|
|
8. If the distribution and/or use of the Program is restricted in\n\ |
|
|
certain countries either by patents or by copyrighted interfaces, the\n\ |
|
|
original copyright holder who places the Program under this License\n\ |
|
|
may add an explicit geographical distribution limitation excluding\n\ |
|
|
those countries, so that distribution is permitted only in or among\n\ |
|
|
countries not thus excluded. In such case, this License incorporates\n\ |
|
|
the limitation as if written in the body of this License.\n\ |
|
|
\n\ |
|
|
9. The Free Software Foundation may publish revised and/or new versions\n\ |
|
|
of the General Public License from time to time. Such new versions will\n\ |
|
|
be similar in spirit to the present version, but may differ in detail to\n\ |
|
|
address new problems or concerns.\n\ |
|
|
\n\ |
|
|
Each version is given a distinguishing version number. If the Program\n\ |
|
|
specifies a version number of this License which applies to it and \"any\n\ |
|
|
later version\", you have the option of following the terms and conditions\n\ |
|
|
either of that version or of any later version published by the Free\n\ |
|
|
Software Foundation. If the Program does not specify a version number of\n\ |
|
|
this License, you may choose any version ever published by the Free Software\n\ |
|
|
Foundation.\n\ |
|
|
\n\ |
|
|
10. If you wish to incorporate parts of the Program into other free\n\ |
|
|
programs whose distribution conditions are different, write to the author\n\ |
|
|
to ask for permission. For software which is copyrighted by the Free\n\ |
|
|
Software Foundation, write to the Free Software Foundation; we sometimes\n\ |
|
|
make exceptions for this. Our decision will be guided by the two goals\n\ |
|
|
of preserving the free status of all derivatives of our free software and\n\ |
|
|
of promoting the sharing and reuse of software generally.\n"); |
|
|
} |
|
|
|
|
|
extern void warranty(environment *env){ |
|
|
printf(" NO WARRANTY\n\ |
|
|
\n\ |
|
|
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY\n\ |
|
|
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN\n\ |
|
|
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES\n\ |
|
|
PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED\n\ |
|
|
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\n\ |
|
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS\n\ |
|
|
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE\n\ |
|
|
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,\n\ |
|
|
REPAIR OR CORRECTION.\n\ |
|
|
\n\ |
|
|
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING\n\ |
|
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR\n\ |
|
|
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,\n\ |
|
|
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING\n\ |
|
|
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED\n\ |
|
|
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY\n\ |
|
|
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER\n\ |
|
|
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE\n\ |
|
|
POSSIBILITY OF SUCH DAMAGES.\n"); |
|
|
} |
|
|
|
|
|
/* "*" */ |
|
|
extern void sx_2a(environment *env) |
|
|
{ |
|
|
int a, b; |
|
|
float fa, fb; |
|
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b*a); |
|
|
|
|
|
return; |
|
|
} |
|
1002 |
|
|
1003 |
if(env->head->item->type==tfloat |
int check_args(environment *env, ...) |
|
&& env->head->next->item->type==tfloat) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb*fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==tfloat |
|
|
&& env->head->next->item->type==integer) { |
|
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b*fa); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==tfloat) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb*a); |
|
|
|
|
|
return; |
|
|
} |
|
|
|
|
|
printerr("Bad Argument Type"); |
|
|
env->err=2; |
|
|
} |
|
|
|
|
|
/* "/" */ |
|
|
extern void sx_2f(environment *env) |
|
1004 |
{ |
{ |
1005 |
int a, b; |
va_list ap; |
1006 |
float fa, fb; |
enum type_enum mytype; |
|
|
|
|
if((env->head)==NULL || env->head->next==NULL) { |
|
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
|
} |
|
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b=env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b/a); |
|
1007 |
|
|
1008 |
return; |
value *iter= env->head; |
1009 |
} |
int errval= 0; |
1010 |
|
|
1011 |
if(env->head->item->type==tfloat |
va_start(ap, env); |
1012 |
&& env->head->next->item->type==tfloat) { |
while(1) { |
1013 |
fa= env->head->item->content.f; |
mytype= va_arg(ap, enum type_enum); |
1014 |
toss(env); if(env->err) return; |
// fprintf(stderr, "%s\n", env->errsymb); |
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb/fa); |
|
|
|
|
|
return; |
|
|
} |
|
1015 |
|
|
1016 |
if(env->head->item->type==tfloat |
if(mytype==empty) |
1017 |
&& env->head->next->item->type==integer) { |
break; |
|
fa= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, b/fa); |
|
1018 |
|
|
1019 |
return; |
if(iter->type==empty || iter==NULL) { |
1020 |
} |
errval= 1; |
1021 |
|
break; |
1022 |
if(env->head->item->type==integer |
} |
|
&& env->head->next->item->type==tfloat) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
fb= env->head->item->content.f; |
|
|
toss(env); if(env->err) return; |
|
|
push_float(env, fb/a); |
|
|
|
|
|
return; |
|
|
} |
|
1023 |
|
|
1024 |
printerr("Bad Argument Type"); |
if(mytype==unknown) { |
1025 |
env->err=2; |
iter=CDR(iter); |
1026 |
} |
continue; |
1027 |
|
} |
1028 |
|
|
1029 |
/* "mod" */ |
if(CAR(iter)->type!=mytype) { |
1030 |
extern void mod(environment *env) |
errval= 2; |
1031 |
{ |
break; |
1032 |
int a, b; |
} |
1033 |
|
|
1034 |
if((env->head)==NULL || env->head->next==NULL) { |
iter= CDR(iter); |
|
printerr("Too Few Arguments"); |
|
|
env->err=1; |
|
|
return; |
|
1035 |
} |
} |
|
|
|
|
if(env->head->item->type==integer |
|
|
&& env->head->next->item->type==integer) { |
|
|
a= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
b= env->head->item->content.i; |
|
|
toss(env); if(env->err) return; |
|
|
push_int(env, b%a); |
|
1036 |
|
|
1037 |
return; |
va_end(ap); |
|
} |
|
1038 |
|
|
1039 |
printerr("Bad Argument Type"); |
env->err= errval; |
1040 |
env->err=2; |
return errval; |
1041 |
} |
} |