205 lines
2.8 KiB
C++
205 lines
2.8 KiB
C++
#include "stdafx.h"
|
|
#include "defs.h"
|
|
|
|
extern int test_flag;
|
|
jmp_buf stop_return;
|
|
static char *errstr;
|
|
|
|
void
|
|
stop(char *str)
|
|
{
|
|
errstr = str; // don't print str now, jmp_buf might be redirected
|
|
longjmp(stop_return, 1);
|
|
}
|
|
|
|
void
|
|
run(char *s)
|
|
{
|
|
int n;
|
|
|
|
esc_flag = 0;
|
|
draw_flag = 0;
|
|
|
|
if (setjmp(stop_return)) {
|
|
if (errstr) {
|
|
printstr("Stop: ");
|
|
printstr(errstr);
|
|
printstr("\n");
|
|
}
|
|
return;
|
|
}
|
|
|
|
init();
|
|
|
|
tos = 0;
|
|
|
|
frame = stack + TOS;
|
|
|
|
if (dash_dash_command(s))
|
|
return;
|
|
|
|
while (1) {
|
|
|
|
n = scan(s);
|
|
|
|
if (n == 0)
|
|
break;
|
|
|
|
s += n;
|
|
|
|
setup();
|
|
|
|
p1 = pop();
|
|
check_stack();
|
|
|
|
push(p1);
|
|
top_level_eval();
|
|
|
|
p2 = pop();
|
|
check_stack();
|
|
|
|
if (p2 == symbol(NIL))
|
|
continue;
|
|
|
|
// print string w/o quotes
|
|
|
|
if (isstr(p2)) {
|
|
printstr(p2->u.str);
|
|
printstr("\n");
|
|
continue;
|
|
}
|
|
|
|
if (equal(symbol(TTY)->u.sym.binding, one) || test_flag) // tty mode?
|
|
printline(p2);
|
|
else {
|
|
#ifdef LINUX
|
|
display(p2);
|
|
#else
|
|
push(p2);
|
|
cmdisplay();
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
dash_dash_command(char *s)
|
|
{
|
|
if (strncmp(s, "--mem", 5) == 0) {
|
|
print_mem_info();
|
|
return 1;
|
|
}
|
|
if (strncmp(s, "--gc", 4) == 0) {
|
|
gc();
|
|
printstr("OK\n");
|
|
return 1;
|
|
}
|
|
|
|
if (strncmp(s, "--test", 6) == 0) {
|
|
selftest();
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
check_stack(void)
|
|
{
|
|
if (tos != 0)
|
|
stop("stack error");
|
|
if (frame != stack + TOS)
|
|
stop("frame error");
|
|
}
|
|
|
|
// cannot reference symbols yet
|
|
|
|
void
|
|
echo_input(char *s)
|
|
{
|
|
printstr(s);
|
|
printstr("\n");
|
|
}
|
|
|
|
// returns nil on stack if no result to print
|
|
|
|
void
|
|
top_level_eval(void)
|
|
{
|
|
save();
|
|
|
|
p1 = pop();
|
|
push(p1);
|
|
eval();
|
|
p2 = pop();
|
|
|
|
// "draw", "for" and "setq" return "nil", there is no result to print
|
|
|
|
if (p2 == symbol(NIL)) {
|
|
push(p2);
|
|
restore();
|
|
return;
|
|
}
|
|
|
|
// update "last"
|
|
|
|
symbol(LAST)->u.sym.binding = p2;
|
|
symbol(LAST)->u.sym.arglist = symbol(NIL);
|
|
|
|
if (!iszero(symbol(BAKE)->u.sym.binding)) {
|
|
push(p2);
|
|
bake();
|
|
p2 = pop();
|
|
}
|
|
|
|
// If we evaluated the symbol "i" or "j" and the result was sqrt(-1)
|
|
|
|
// then don't do anything.
|
|
|
|
// Otherwise if "j" is an imaginary unit then subst.
|
|
|
|
// Otherwise if "i" is an imaginary unit then subst.
|
|
|
|
if ((p1 == symbol(SYMBOL_I) || p1 == symbol(SYMBOL_J))
|
|
&& isimaginaryunit(p2))
|
|
;
|
|
else if (isimaginaryunit(symbol(SYMBOL_J)->u.sym.binding)) {
|
|
push(p2);
|
|
push(imaginaryunit);
|
|
push_symbol(SYMBOL_J);
|
|
subst();
|
|
p2 = pop();
|
|
} else if (isimaginaryunit(symbol(SYMBOL_I)->u.sym.binding)) {
|
|
push(p2);
|
|
push(imaginaryunit);
|
|
push_symbol(SYMBOL_I);
|
|
subst();
|
|
p2 = pop();
|
|
}
|
|
|
|
#ifndef LINUX
|
|
|
|
// if we evaluated the symbol "a" and got "b" then print "a=b"
|
|
|
|
// do not print "a=a"
|
|
|
|
if (issymbol(p1) && !iskeyword(p1) && p1 != p2 && test_flag == 0) {
|
|
push_symbol(SETQ);
|
|
push(p1);
|
|
push(p2);
|
|
list(3);
|
|
p2 = pop();
|
|
}
|
|
#endif
|
|
push(p2);
|
|
|
|
restore();
|
|
}
|
|
|
|
void
|
|
check_esc_flag(void)
|
|
{
|
|
if (esc_flag)
|
|
stop("esc key");
|
|
}
|