static void
unparse_stmt_catch(Stream * str, struct Stmt_Catch catchstmt, int indent)
{
Except_Arm *ex;
stream_add_string(str, "try");
output(str);
unparse_stmt(catchstmt.body, indent + 2);
for (ex = catchstmt.excepts; ex; ex = ex->next) {
indent_stmt(str, indent);
stream_add_string(str, "except ");
if (ex->id >= 0)
stream_printf(str, "%s ", prog->var_names[ex->id]);
stream_add_char(str, '(');
if (ex->codes)
unparse_arglist(str, ex->codes);
else
stream_add_string(str, "ANY");
stream_add_char(str, ')');
output(str);
unparse_stmt(ex->stmt, indent + 2);
}
indent_stmt(str, indent);
stream_add_string(str, "endtry");
output(str);
}
static void
unparse_stmt_cond(Stream * str, struct Stmt_Cond cond, int indent)
{
Cond_Arm *elseifs;
stream_add_string(str, "if (");
unparse_expr(str, cond.arms->condition);
stream_add_char(str, ')');
output(str);
unparse_stmt(cond.arms->stmt, indent + 2);
for (elseifs = cond.arms->next; elseifs; elseifs = elseifs->next) {
indent_stmt(str, indent);
stream_add_string(str, "elseif (");
unparse_expr(str, elseifs->condition);
stream_add_char(str, ')');
output(str);
unparse_stmt(elseifs->stmt, indent + 2);
}
if (cond.otherwise) {
indent_stmt(str, indent);
stream_add_string(str, "else");
output(str);
unparse_stmt(cond.otherwise, indent + 2);
}
indent_stmt(str, indent);
stream_add_string(str, "endif");
output(str);
}
static void
bracket_le(Stream * str, enum Expr_Kind parent, Expr * child)
{
if ((fully_parenthesize && expr_prec[child->kind] < expr_prec[EXPR_PROP])
|| expr_prec[parent] >= expr_prec[child->kind]) {
stream_add_char(str, '(');
unparse_expr(str, child);
stream_add_char(str, ')');
} else {
unparse_expr(str, child);
}
}
static void
indent_stmt(Stream * str, int indent)
{
int i;
if (indent_code)
for (i = 0; i < indent; i++)
stream_add_char(str, ' ');
}
static void
unparse_name_expr(Stream * str, Expr * expr)
{
/*
* Handle the right-hand expression in EXPR_PROP and EXPR_VERB.
* If it's a simple string literal with the syntax of an identifier,
* just print the name. Otherwise, use parens and unparse the
* expression normally.
*/
if (expr->kind == EXPR_VAR && expr->e.var.type == TYPE_STR
&& ok_identifier(expr->e.var.v.str)) {
stream_add_string(str, expr->e.var.v.str);
return;
}
/* We need to use the full unparser */
stream_add_char(str, '(');
unparse_expr(str, expr);
stream_add_char(str, ')');
}
static void
unparse_stmt_list(Stream * str, struct Stmt_List list, int indent)
{
stream_printf(str, "for %s in (", prog->var_names[list.id]);
unparse_expr(str, list.expr);
stream_add_char(str, ')');
output(str);
unparse_stmt(list.body, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "endfor");
output(str);
}
static void
unparse_arglist(Stream * str, Arg_List * args)
{
while (args) {
if (args->kind == ARG_SPLICE)
stream_add_char(str, '@');
unparse_expr(str, args->expr);
if (args->next)
stream_add_string(str, ", ");
args = args->next;
}
}
static void
unparse_stmt_range(Stream * str, struct Stmt_Range range, int indent)
{
stream_printf(str, "for %s in [", prog->var_names[range.id]);
unparse_expr(str, range.from);
stream_add_string(str, "..");
unparse_expr(str, range.to);
stream_add_char(str, ']');
output(str);
unparse_stmt(range.body, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "endfor");
output(str);
}
static void
unparse_stmt_fork(Stream * str, struct Stmt_Fork fork_stmt, int indent)
{
if (fork_stmt.id >= 0)
stream_printf(str, "fork %s (", prog->var_names[fork_stmt.id]);
else
stream_add_string(str, "fork (");
unparse_expr(str, fork_stmt.time);
stream_add_char(str, ')');
output(str);
unparse_stmt(fork_stmt.body, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "endfork");
output(str);
}
static void
unparse_scatter(Stream * str, Scatter * sc)
{
while (sc) {
switch (sc->kind) {
case SCAT_REST:
stream_add_char(str, '@');
/* fall thru to ... */
case SCAT_REQUIRED:
stream_add_string(str, prog->var_names[sc->id]);
break;
case SCAT_OPTIONAL:
stream_printf(str, "?%s", prog->var_names[sc->id]);
if (sc->expr) {
stream_add_string(str, " = ");
unparse_expr(str, sc->expr);
}
}
if (sc->next)
stream_add_string(str, ", ");
sc = sc->next;
}
}
static void
disassemble(Program * prog, Printer p, void *data)
{
Stream *s = new_stream(100);
Stream *insn = new_stream(50);
int i, l;
unsigned pc;
Bytecodes bc;
const char *ptr;
const char **names = prog->var_names;
unsigned tmp, num_names = prog->num_var_names;
# define NAMES(i) (tmp = i, \
tmp < num_names ? names[tmp] \
: "*** Unknown variable ***")
Var *literals = prog->literals;
initialize_tables();
print = p;
print_data = data;
stream_printf(s, "Language version number: %d", (int) prog->version);
output(s);
stream_printf(s, "First line number: %d", prog->first_lineno);
output(s);
for (i = -1; i < 0 || i < prog->fork_vectors_size; i++) {
output(s);
if (i == -1) {
stream_printf(s, "Main code vector:");
output(s);
stream_printf(s, "=================");
output(s);
bc = prog->main_vector;
} else {
stream_printf(s, "Forked code vector %d:", i);
l = stream_length(s);
output(s);
while (l--)
stream_add_char(s, '=');
output(s);
bc = prog->fork_vectors[i];
}
stream_printf(s, "[Bytes for labels = %d, literals = %d, ",
bc.numbytes_label, bc.numbytes_literal);
stream_printf(s, "forks = %d, variables = %d, stack refs = %d]",
bc.numbytes_fork, bc.numbytes_var_name,
bc.numbytes_stack);
output(s);
stream_printf(s, "[Maximum stack size = %d]", bc.max_stack);
output(s);
max_bytes_width = 5;
for (pc = 0; pc < bc.size;) {
Byte b;
unsigned arg;
# define ADD_BYTES(n) (arg = add_bytes(s, bc.vector, pc, n), \
pc += n, \
arg)
unsigned a1, a2;
new_insn(s, pc);
b = add_bytes(s, bc.vector, pc++, 1);
if (b != OP_EXTENDED)
stream_add_string(insn, COUNT_TICK(b) ? " * " : " ");
if (IS_OPTIM_NUM_OPCODE(b))
stream_printf(insn, "NUM %d", OPCODE_TO_OPTIM_NUM(b));
#ifdef BYTECODE_REDUCE_REF
else if (IS_PUSH_CLEAR_n(b))
stream_printf(insn, "PUSH_CLEAR %s", NAMES(PUSH_CLEAR_n_INDEX(b)));
#endif /* BYTECODE_REDUCE_REF */
else if (IS_PUSH_n(b))
stream_printf(insn, "PUSH %s", NAMES(PUSH_n_INDEX(b)));
else if (IS_PUT_n(b))
stream_printf(insn, "PUT %s", NAMES(PUT_n_INDEX(b)));
else if (b == OP_EXTENDED) {
b = ADD_BYTES(1);
stream_add_string(insn, COUNT_EOP_TICK(b) ? " * " : " ");
stream_add_string(insn, ext_mnemonics[b]);
switch ((Extended_Opcode) b) {
case EOP_WHILE_ID:
a1 = ADD_BYTES(bc.numbytes_var_name);
a2 = ADD_BYTES(bc.numbytes_label);
stream_printf(insn, " %s %d", NAMES(a1), a2);
break;
case EOP_EXIT_ID:
stream_printf(insn, " %s",
NAMES(ADD_BYTES(bc.numbytes_var_name)));
/* fall thru */
case EOP_EXIT:
a1 = ADD_BYTES(bc.numbytes_stack);
a2 = ADD_BYTES(bc.numbytes_label);
stream_printf(insn, " %d %d", a1, a2);
break;
case EOP_PUSH_LABEL:
case EOP_END_CATCH:
case EOP_END_EXCEPT:
case EOP_TRY_FINALLY:
stream_printf(insn, " %d", ADD_BYTES(bc.numbytes_label));
break;
case EOP_TRY_EXCEPT:
stream_printf(insn, " %d", ADD_BYTES(1));
break;
case EOP_LENGTH:
stream_printf(insn, " %d", ADD_BYTES(bc.numbytes_stack));
break;
case EOP_SCATTER:
{
int i, nargs = ADD_BYTES(1);
a1 = ADD_BYTES(1);
a2 = ADD_BYTES(1);
stream_printf(insn, " %d/%d/%d:", nargs, a1, a2);
for (i = 0; i < nargs; i++) {
a1 = ADD_BYTES(bc.numbytes_var_name);
a2 = ADD_BYTES(bc.numbytes_label);
stream_printf(insn, " %s/%d", NAMES(a1), a2);
}
stream_printf(insn, " %d",
ADD_BYTES(bc.numbytes_label));
}
break;
default:
break;
}
} else {
stream_add_string(insn, mnemonics[b]);
switch ((Opcode) b) {
case OP_IF:
case OP_IF_QUES:
case OP_EIF:
case OP_AND:
case OP_OR:
case OP_JUMP:
case OP_WHILE:
stream_printf(insn, " %d", ADD_BYTES(bc.numbytes_label));
break;
case OP_FORK:
stream_printf(insn, " %d", ADD_BYTES(bc.numbytes_fork));
break;
case OP_FORK_WITH_ID:
a1 = ADD_BYTES(bc.numbytes_fork);
a2 = ADD_BYTES(bc.numbytes_var_name);
stream_printf(insn, " %d %s", a1, NAMES(a2));
break;
case OP_FOR_LIST:
case OP_FOR_RANGE:
a1 = ADD_BYTES(bc.numbytes_var_name);
a2 = ADD_BYTES(bc.numbytes_label);
stream_printf(insn, " %s %d", NAMES(a1), a2);
break;
case OP_G_PUSH:
#ifdef BYTECODE_REDUCE_REF
case OP_G_PUSH_CLEAR:
#endif /* BYTECODE_REDUCE_REF */
case OP_G_PUT:
stream_printf(insn, " %s",
NAMES(ADD_BYTES(bc.numbytes_var_name)));
break;
case OP_IMM:
{
Var v;
v = literals[ADD_BYTES(bc.numbytes_literal)];
switch (v.type) {
case TYPE_OBJ:
stream_printf(insn, " #%d", v.v.obj);
break;
case TYPE_INT:
stream_printf(insn, " %d", v.v.num);
break;
case TYPE_STR:
stream_add_string(insn, " \"");
for (ptr = v.v.str; *ptr; ptr++) {
if (*ptr == '"' || *ptr == '\\')
stream_add_char(insn, '\\');
stream_add_char(insn, *ptr);
}
stream_add_char(insn, '"');
break;
case TYPE_ERR:
stream_printf(insn, " %s", error_name(v.v.err));
break;
default:
stream_printf(insn, " <literal type = %d>",
v.type);
break;
}
}
break;
case OP_BI_FUNC_CALL:
stream_printf(insn, " %s", name_func_by_num(ADD_BYTES(1)));
default:
break;
}
}
finish_insn(s, insn);
}
}
free_stream(s);
free_stream(insn);
}
static const char *
translate_pattern(const char *pattern, int *tpatlen)
{
/* Translate a MOO pattern into a more standard syntax. Effectively, this
* just involves converting from `%' escapes into `\' escapes.
*/
static Stream *s = 0;
const char *p = pattern;
char c;
if (!s)
s = new_stream(100);
while (*p) {
switch (c = *p++) {
case '%':
c = *p++;
if (!c)
goto fail;
else if (strchr(".*+?[^$|()123456789bB<>wW", c))
stream_add_char(s, '\\');
stream_add_char(s, c);
break;
case '\\':
stream_add_string(s, "\\\\");
break;
case '[':
/* Any '%' or '\' characters inside a charset should be copied
* over without translation. */
stream_add_char(s, c);
c = *p++;
if (c == '^') {
stream_add_char(s, c);
c = *p++;
}
/* This is the only place a ']' can appear and not be the end of
* the charset. */
if (c == ']') {
stream_add_char(s, c);
c = *p++;
}
while (c && c != ']') {
stream_add_char(s, c);
c = *p++;
}
if (!c)
goto fail;
else
stream_add_char(s, c);
break;
default:
stream_add_char(s, c);
break;
}
}
*tpatlen = stream_length(s);
return reset_stream(s);
fail:
reset_stream(s);
return 0;
}
int
network_process_io(int timeout)
{
network_handle nh;
static server_handle sh;
static Stream *s = 0;
char buffer[1024];
int count;
char *ptr, *end;
int got_some = 0;
if (s == 0) {
int flags;
s = new_stream(1000);
if ((flags = fcntl(0, F_GETFL)) < 0
|| fcntl(0, F_SETFL, flags | NONBLOCK_FLAG) < 0) {
log_perror("Setting standard input non-blocking");
return 0;
}
}
switch (state) {
case STATE_CLOSED:
if (listening) {
sh = server_new_connection(slistener, nh, 0);
state = STATE_OPEN;
got_some = 1;
} else if (timeout != 0)
sleep(timeout);
break;
case STATE_OPEN:
for (;;) {
while (!input_suspended
&& (count = read(0, buffer, sizeof(buffer))) > 0) {
got_some = 1;
if (binary) {
stream_add_string(s, raw_bytes_to_binary(buffer, count));
server_receive_line(sh, reset_stream(s));
} else
for (ptr = buffer, end = buffer + count;
ptr < end;
ptr++) {
unsigned char c = *ptr;
if (isgraph(c) || c == ' ' || c == '\t')
stream_add_char(s, c);
else if (c == '\n')
server_receive_line(sh, reset_stream(s));
}
}
if (got_some || timeout == 0)
goto done;
sleep(1);
timeout--;
}
}
done:
return got_some;
}
static void
unparse_expr(Stream * str, Expr * expr)
{
switch (expr->kind) {
case EXPR_PROP:
if (expr->e.bin.lhs->kind == EXPR_VAR
&& expr->e.bin.lhs->e.var.type == TYPE_OBJ
&& expr->e.bin.lhs->e.var.v.obj == 0
&& expr->e.bin.rhs->kind == EXPR_VAR
&& expr->e.bin.rhs->e.var.type == TYPE_STR
&& ok_identifier(expr->e.bin.rhs->e.var.v.str)) {
stream_add_char(str, '$');
stream_add_string(str, expr->e.bin.rhs->e.var.v.str);
} else {
bracket_lt(str, EXPR_PROP, expr->e.bin.lhs);
if (expr->e.bin.lhs->kind == EXPR_VAR
&& expr->e.bin.lhs->e.var.type == TYPE_INT)
/* avoid parsing digits followed by dot as floating-point */
stream_add_char(str, ' ');
stream_add_char(str, '.');
unparse_name_expr(str, expr->e.bin.rhs);
}
break;
case EXPR_VERB:
if (expr->e.verb.obj->kind == EXPR_VAR
&& expr->e.verb.obj->e.var.type == TYPE_OBJ
&& expr->e.verb.obj->e.var.v.obj == 0
&& expr->e.verb.verb->kind == EXPR_VAR
&& expr->e.verb.verb->e.var.type == TYPE_STR
&& ok_identifier(expr->e.verb.verb->e.var.v.str)) {
stream_add_char(str, '$');
stream_add_string(str, expr->e.verb.verb->e.var.v.str);
} else {
bracket_lt(str, EXPR_VERB, expr->e.verb.obj);
stream_add_char(str, ':');
unparse_name_expr(str, expr->e.verb.verb);
}
stream_add_char(str, '(');
unparse_arglist(str, expr->e.verb.args);
stream_add_char(str, ')');
break;
case EXPR_INDEX:
bracket_lt(str, EXPR_INDEX, expr->e.bin.lhs);
stream_add_char(str, '[');
unparse_expr(str, expr->e.bin.rhs);
stream_add_char(str, ']');
break;
case EXPR_RANGE:
bracket_lt(str, EXPR_RANGE, expr->e.range.base);
stream_add_char(str, '[');
unparse_expr(str, expr->e.range.from);
stream_add_string(str, "..");
unparse_expr(str, expr->e.range.to);
stream_add_char(str, ']');
break;
/* left-associative binary operators */
case EXPR_PLUS:
case EXPR_MINUS:
case EXPR_TIMES:
case EXPR_DIVIDE:
case EXPR_MOD:
case EXPR_AND:
case EXPR_OR:
case EXPR_EQ:
case EXPR_NE:
case EXPR_LT:
case EXPR_GT:
case EXPR_LE:
case EXPR_GE:
case EXPR_IN:
bracket_lt(str, expr->kind, expr->e.bin.lhs);
stream_add_string(str, binop_string[expr->kind]);
bracket_le(str, expr->kind, expr->e.bin.rhs);
break;
/* right-associative binary operators */
case EXPR_EXP:
bracket_le(str, expr->kind, expr->e.bin.lhs);
stream_add_string(str, binop_string[expr->kind]);
bracket_lt(str, expr->kind, expr->e.bin.rhs);
break;
case EXPR_COND:
bracket_le(str, EXPR_COND, expr->e.cond.condition);
stream_add_string(str, " ? ");
unparse_expr(str, expr->e.cond.consequent);
stream_add_string(str, " | ");
bracket_le(str, EXPR_COND, expr->e.cond.alternate);
break;
case EXPR_NEGATE:
stream_add_char(str, '-');
bracket_lt(str, EXPR_NEGATE, expr->e.expr);
break;
case EXPR_NOT:
stream_add_char(str, '!');
bracket_lt(str, EXPR_NOT, expr->e.expr);
break;
case EXPR_VAR:
stream_add_string(str, value_to_literal(expr->e.var));
break;
case EXPR_ASGN:
unparse_expr(str, expr->e.bin.lhs);
stream_add_string(str, " = ");
unparse_expr(str, expr->e.bin.rhs);
break;
case EXPR_CALL:
stream_add_string(str, name_func_by_num(expr->e.call.func));
stream_add_char(str, '(');
unparse_arglist(str, expr->e.call.args);
stream_add_char(str, ')');
break;
case EXPR_ID:
stream_add_string(str, prog->var_names[expr->e.id]);
break;
case EXPR_LIST:
stream_add_char(str, '{');
unparse_arglist(str, expr->e.list);
stream_add_char(str, '}');
break;
case EXPR_SCATTER:
stream_add_char(str, '{');
unparse_scatter(str, expr->e.scatter);
stream_add_char(str, '}');
break;
case EXPR_CATCH:
stream_add_string(str, "`");
unparse_expr(str, expr->e.catchexp.tryexp);
stream_add_string(str, " ! ");
if (expr->e.catchexp.codes)
unparse_arglist(str, expr->e.catchexp.codes);
else
stream_add_string(str, "ANY");
if (expr->e.catchexp.except) {
stream_add_string(str, " => ");
unparse_expr(str, expr->e.catchexp.except);
}
stream_add_string(str, "'");
break;
case EXPR_LENGTH:
stream_add_string(str, "$");
break;
default:
errlog("UNPARSE_EXPR: Unknown Expr_Kind: %d\n", expr->kind);
stream_add_string(str, "(?!?!?!?!?)");
break;
}
}
static void
unparse_stmt(Stmt * stmt, int indent)
{
Stream *str = new_stream(100);
while (stmt) {
indent_stmt(str, indent);
switch (stmt->kind) {
case STMT_COND:
unparse_stmt_cond(str, stmt->s.cond, indent);
break;
case STMT_LIST:
unparse_stmt_list(str, stmt->s.list, indent);
break;
case STMT_RANGE:
unparse_stmt_range(str, stmt->s.range, indent);
break;
case STMT_FORK:
unparse_stmt_fork(str, stmt->s.fork, indent);
break;
case STMT_EXPR:
unparse_expr(str, stmt->s.expr);
stream_add_char(str, ';');
output(str);
break;
case STMT_WHILE:
if (stmt->s.loop.id == -1)
stream_add_string(str, "while (");
else
stream_printf(str, "while %s (",
prog->var_names[stmt->s.loop.id]);
unparse_expr(str, stmt->s.loop.condition);
stream_add_char(str, ')');
output(str);
unparse_stmt(stmt->s.loop.body, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "endwhile");
output(str);
break;
case STMT_RETURN:
if (stmt->s.expr) {
stream_add_string(str, "return ");
unparse_expr(str, stmt->s.expr);
} else
stream_add_string(str, "return");
stream_add_char(str, ';');
output(str);
break;
case STMT_TRY_EXCEPT:
unparse_stmt_catch(str, stmt->s.catchexp, indent);
break;
case STMT_TRY_FINALLY:
stream_add_string(str, "try");
output(str);
unparse_stmt(stmt->s.finally.body, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "finally");
output(str);
unparse_stmt(stmt->s.finally.handler, indent + 2);
indent_stmt(str, indent);
stream_add_string(str, "endtry");
output(str);
break;
case STMT_BREAK:
case STMT_CONTINUE:
{
const char *kwd = (stmt->kind == STMT_BREAK ? "break"
: "continue");
if (stmt->s.exit == -1)
stream_printf(str, "%s;", kwd);
else
stream_printf(str, "%s %s;", kwd,
prog->var_names[stmt->s.exit]);
output(str);
}
break;
default:
errlog("UNPARSE_STMT: Unknown Stmt_Kind: %d\n", stmt->kind);
stream_add_string(str, "?!?!?!?;");
output(str);
break;
}
stmt = stmt->next;
}
free_stream(str);
}
void
stream_printf(Stream * s, const char *fmt,...)
{
char buffer[40];
va_list args;
va_start(args, fmt);
while (*fmt) {
char c = *fmt;
if (c == '%') {
char pad = ' ';
int width = 0, base;
const char *string = ""; /* initialized to silence warning */
while ((c = *(++fmt)) != '\0') {
switch (c) {
case 's':
string = va_arg(args, char *);
break;
case 'x':
base = 16;
goto finish_number;
case 'o':
base = 8;
goto finish_number;
case 'd':
base = 10;
finish_number:
string = itoa(va_arg(args, int), base);
break;
case 'g':
sprintf(buffer, dbl_fmt(), va_arg(args, double));
if (!strchr(buffer, '.') && !strchr(buffer, 'e'))
strcat(buffer, ".0"); /* make it look floating */
string = buffer;
break;
case '0':
if (width == 0) {
pad = '0';
continue;
}
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
width = width * 10 + c - '0';
continue;
default:
errlog("STREAM_PRINTF: Unknown format directive: %%%c\n",
c);
goto abort;
}
break;
}
if (width && (width -= strlen(string)) > 0)
while (width--)
stream_add_char(s, pad);
stream_add_string(s, string);
} else
