145 lines
1.9 KiB
C++
145 lines
1.9 KiB
C++
#include "stdafx.h"
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#include "defs.h"
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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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jmp_buf stop_return;
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static char *errstr;
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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 = symbol(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 = symbol(YYLAST)->u.sym.binding;
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symbol(LAST)->u.sym.binding2 = symbol(NIL);
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// print string w/o quotes
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if (isstr(p2)) {
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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 == symbol(NIL) && (iskeyword(p1) || !issymbol(p1)))
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continue;
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if (!iszero(symbol(BAKE)->u.sym.binding)) {
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push(p2);
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bake();
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p2 = pop();
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}
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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 (issymbol(p1) && !iskeyword(p1) && p1 != p2) {
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// print as a = b
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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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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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printstr("OK\n");
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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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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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// cannot reference symbols yet
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void
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echo_input(char *s)
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{
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printstr(s);
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printstr("\n");
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}
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