163 lines
2.4 KiB
C++
163 lines
2.4 KiB
C++
#include "stdafx.h"
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#include "defs.h"
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extern int scan(char *);
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extern void setup(void);
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extern void init(void);
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extern void selftest(void);
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extern void cmdisplay(U *);
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extern int symbol_level;
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extern int test_flag;
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extern U *varlist;
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static void check_stack(void);
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static void print_mem_info(void);
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static int dash_dash_command(char *);
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jmp_buf stop_return;
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static char *errstr;
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static char buf[100];
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void
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stop(char *str)
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{
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errstr = str; // don't print str now, jmp_buf might be redirected
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longjmp(stop_return, 1);
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}
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void
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run(char *s)
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{
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int n;
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esc_flag = 0;
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if (setjmp(stop_return)) {
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restore_symbols(0);
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if (errstr) {
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printstr("Stop: ");
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printstr(errstr);
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printstr("\n");
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}
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return;
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}
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init();
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tos = 0;
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frame = stack + TOS;
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symbol_level = 0;
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varlist = nil;
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if (dash_dash_command(s))
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return;
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while (1) {
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n = scan(s);
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if (n == 0)
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break;
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s += n;
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setup();
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p1 = pop();
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check_stack();
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push(p1);
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eval();
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p2 = pop();
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check_stack();
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symbol(LAST)->u.sym.binding = last;
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symbol(LAST)->u.sym.binding2 = nil;
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// print string w/o quotes
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if (p2->k == STR) {
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printstr(p2->u.str);
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printstr("\n");
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continue;
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}
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// don't print nil unless it was due to eval of a symbol
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if (p2 == nil && !issymbol(p1))
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continue;
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if (equal(symbol(TTY)->u.sym.binding, one) || test_flag) // tty mode?
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printline(p2);
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else {
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#ifdef LINUX
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display(p2);
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#else
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if (p1->k == SYM
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&& p1 != symbol(LAST)
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&& p1 != symbol(TTY)
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&& p1 != p2) {
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push_symbol(SETQ);
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push(p1);
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push(p2);
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list(3);
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p2 = pop();
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}
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cmdisplay(p2);
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#endif
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}
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}
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}
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static int
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dash_dash_command(char *s)
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{
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if (strncmp(s, "--mem", 5) == 0) {
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print_mem_info();
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return 1;
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}
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if (strncmp(s, "--gc", 4) == 0) {
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gc();
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return 1;
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}
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if (strncmp(s, "--test", 6) == 0) {
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selftest();
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return 1;
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}
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return 0;
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}
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static void
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check_stack(void)
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{
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if (tos != 0)
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stop("stack error");
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if (frame != stack + TOS)
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stop("frame error");
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}
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void
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echo_input(char *s)
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{
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if (nil && equal(symbol(TTY)->u.sym.binding, one)) // tty mode?
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printstr("\n");
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printstr(s);
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printstr("\n");
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}
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extern int total_count;
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extern int free_count;
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static void
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print_mem_info(void)
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{
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sprintf(buf, "total atoms %d (%dM) free atoms %d used atoms %d sizeof atom %d\n",
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total_count,
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total_count / 1000000,
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free_count,
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total_count - free_count,
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(int) sizeof (U));
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printstr(buf);
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}
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