}/* decode_program */
/* decode_routine - Decode a routine from start address to last instruction */
static int decode_routine()
{
var header = txio.header;
ulong old_pc, old_start;
tx_h.cref_item_t cref_item;
int vars, status, i, locals;
if (decode.first_pass)
{
cref_item = null;
if (option_labels > 0)
cref_item = current_routine;
old_start = start_of_routine;
locals = locals_count;
old_pc = decode.pc;
decode.pc = ROUND_CODE(decode.pc);
vars = txio.read_data_byte(ref decode.pc);
if (vars >= 0 && vars <= 15)
{
if (option_labels > 0)
add_routine(decode.pc - 1);
locals_count = vars;
if ((uint)header.version < tx_h.V5)
for (; vars > 0; vars--)
txio.read_data_word(ref decode.pc);
start_of_routine = decode.pc;
if (decode_code() == tx_h.END_OF_ROUTINE)
return (tx_h.END_OF_ROUTINE);
if (option_labels > 0)
current_routine = cref_item;
start_of_routine = old_start;
locals_count = locals;
}
decode.pc = old_pc;
if ((status = decode_code()) != tx_h.END_OF_ROUTINE)
{
decode.pc = old_pc;
}
else
{
pctable[pcindex++] = old_pc;
if (pcindex == MAX_PCS)
{
throw new NotImplementedException("\nFatal: too many orphan code fragments\n");
}
}
}
else
{
if (decode.pc == start_data_pc)
{
if (option_dump > 0)
{
txio.tx_printf("\n[Start of data");
if (option_labels == 0)
txio.tx_printf(" at {0:X}", (ulong)start_data_pc);
txio.tx_printf("]\n\n");
dump_data(start_data_pc, end_data_pc - 1);
txio.tx_printf("\n[End of data");
if (option_labels == 0)
txio.tx_printf(" at {0:X}", (ulong)(end_data_pc - 1));
txio.tx_printf("]\n");
}
decode.pc = end_data_pc;
}
for (i = 0; i < pcindex && decode.pc != pctable[i]; i++)
;
if (i == pcindex)
{
decode.pc = ROUND_CODE(decode.pc);
start_of_routine = decode.pc;
vars = txio.read_data_byte(ref decode.pc);
if (option_labels > 0)
{
txio.tx_printf("{0}outine {1}{2:d4}, {3} local",
(decode.pc - 1 == decode.initial_pc) ? "\nMain r" : "\nR",
(txio.option_inform) ? 'r' : 'R',
(int)lookup_routine(decode.pc - 1, 1),
(int)vars);
}
else
{
txio.tx_printf("{0}outine {1:X}, {2} local",
(decode.pc - 1 == decode.initial_pc) ? "\nMain r" : "\nR",
(ulong)(decode.pc - 1),
(int)vars);
}
if (vars != 1)
txio.tx_printf("s");
if ((uint)header.version < tx_h.V5)
{
txio.tx_printf(" (");
txio.tx_fix_margin(1);
for (; vars > 0; vars--)
{
txio.tx_printf("{0:X4}", (uint)txio.read_data_word(ref decode.pc));
if (vars > 1)
txio.tx_printf(", ");
}
txio.tx_fix_margin(0);
txio.tx_printf(")");
}
txio.tx_printf("\n");
lookup_verb(start_of_routine);
txio.tx_printf("\n");
}
else
txio.tx_printf("\norphan code fragment:\n\n");
status = decode_code();
}
return (status);
}/* decode_routine */
}/* lookup_label */
static int lookup_routine(ulong addr, int flag)
{
// cref_item_t *cref_item = routines_base;
// while (cref_item != NULL && cref_item->address != addr)
// cref_item = cref_item->next;
// if (cref_item == NULL) {
// if (flag) {
// (void) fprintf (stderr, "\nFatal: cannot find routine!\n");
// exit (EXIT_FAILURE);
// } else
// return (0);
// }
// if (flag)
// current_routine = cref_item;
// return (cref_item->number);
for (int i = 0; i < routines_base.Count; i++)
{
if (routines_base[i].address == addr)
{
if (flag == 1)
{
current_routine = routines_base[i];
}
return routines_base[i].number;
}
}
if (flag == 1)
{
throw new ArgumentException("\nFatal: Cannot find routine!\n");
}
else
{
return 0;
}
}/* lookup_routine */
}/* in_dictionary */
internal static void add_label(ulong addr)
{
// cref_item_t *cref_item, **prev_item, *next_item;
if (current_routine == null)
return;
tx_h.cref_item_t child = new tx_h.cref_item_t();
child.address = addr;
child.number = 0;
current_routine.child.Add(child);
// prev_item = ¤t_routine->child;
// next_item = current_routine->child;
// while (next_item != NULL && next_item->address < addr) {
// prev_item = &(next_item->next);
// next_item = next_item->next;
// }
// if (next_item == NULL || next_item->address != addr) {
// cref_item = (cref_item_t *) malloc (sizeof (cref_item_t));
// if (cref_item == NULL) {
// (void) fprintf (stderr, "\nFatal: insufficient memory\n");
// exit (EXIT_FAILURE);
// }
// cref_item->next = next_item;
// *prev_item = cref_item;
// cref_item->child = NULL;
// cref_item->address = addr;
// cref_item->number = 0;
// }
// add_routine(addr); // TODO I'm not sure this is correct
}/* add_label */
}/* add_label */
static void add_routine(ulong addr)
{
// cref_item_t *cref_item, **prev_item, *next_item;
// prev_item = &routines_base;
// next_item = routines_base;
// while (next_item != NULL && next_item->address < addr) {
// prev_item = &(next_item->next);
// next_item = next_item->next;
// }
// if (next_item == NULL || next_item->address != addr) {
// cref_item = (cref_item_t *) malloc (sizeof (cref_item_t));
// if (cref_item == NULL) {
// (void) fprintf (stderr, "\nFatal: insufficient memory\n");
// exit (EXIT_FAILURE);
// }
// cref_item->next = next_item;
// *prev_item = cref_item;
// cref_item->child = NULL;
// cref_item->address = addr;
// cref_item->number = 0;
// } else
// cref_item = next_item;
// current_routine = cref_item;
if (routines_base == null)
{
routines_base = new System.Collections.Generic.List<tx_h.cref_item_t>();
}
tx_h.cref_item_t cref_item = new tx_h.cref_item_t();
cref_item.address = addr;
cref_item.number = 0;
routines_base.Insert(0, cref_item);
current_routine = cref_item;
}/* add_routine */
}/* decode_strings */
/* scan_strings - build string address table */
internal static void scan_strings(ulong pc)
{
ulong old_pc;
int count = 1;
zword_t data;
strings_base = new System.Collections.Generic.List<tx_h.cref_item_t>();
pc = ROUND_DATA(pc);
old_pc = pc;
while (pc < (ulong)txio.file_size)
{
tx_h.cref_item_t cref_item = new tx_h.cref_item_t();
cref_item.address = pc;
cref_item.number = count++;
strings_base.Insert(0, cref_item);
old_pc = pc;
do
data = (zword_t)txio.read_data_word(ref pc);
while (pc < (ulong)txio.file_size && ((uint)data & 0x8000) == 0);
pc = ROUND_CODE(pc);
if ((uint)(data & 0x8000) > 0)
old_pc = pc;
}
txio.file_size = (int)old_pc;
}/* scan_strings */