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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*********************************************************************
dvstate.c
State debugger view.
***************************************************************************/
#include "emu.h"
#include "debugvw.h"
#include "dvstate.h"
const int debug_view_state::REG_DIVIDER;
const int debug_view_state::REG_CYCLES;
const int debug_view_state::REG_BEAMX;
const int debug_view_state::REG_BEAMY;
const int debug_view_state::REG_FRAME;
//**************************************************************************
// DEBUG VIEW STATE SOURCE
//**************************************************************************
//-------------------------------------------------
// debug_view_state_source - constructor
//-------------------------------------------------
debug_view_state_source::debug_view_state_source(const char *name, device_t &device)
: debug_view_source(name, &device)
, m_stateintf(dynamic_cast<device_state_interface *>(&device))
, m_execintf(dynamic_cast<device_execute_interface *>(&device))
{
}
//**************************************************************************
// DEBUG VIEW STATE
//**************************************************************************
//-------------------------------------------------
// debug_view_state - constructor
//-------------------------------------------------
debug_view_state::debug_view_state(running_machine &machine, debug_view_osd_update_func osdupdate, void *osdprivate)
: debug_view(machine, DVT_STATE, osdupdate, osdprivate)
, m_divider(0)
, m_last_update(0)
{
// fail if no available sources
enumerate_sources();
if (m_source_list.count() == 0)
throw std::bad_alloc();
}
//-------------------------------------------------
// ~debug_view_state - destructor
//-------------------------------------------------
debug_view_state::~debug_view_state()
{
reset();
}
//-------------------------------------------------
// enumerate_sources - enumerate all possible
// sources for a registers view
//-------------------------------------------------
void debug_view_state::enumerate_sources()
{
// start with an empty list
m_source_list.reset();
// iterate over devices that have state interfaces
std::string name;
for (device_state_interface &state : state_interface_iterator(machine().root_device()))
{
name = string_format("%s '%s'", state.device().name(), state.device().tag());
m_source_list.append(*global_alloc(debug_view_state_source(name.c_str(), state.device())));
}
// reset the source to a known good entry
set_source(*m_source_list.first());
}
//-------------------------------------------------
// reset - delete all of our state items
//-------------------------------------------------
void debug_view_state::reset()
{
// free all items in the state list
m_state_list.clear();
}
//-------------------------------------------------
// recompute - recompute all info for the
// registers view
//-------------------------------------------------
void debug_view_state::recompute()
{
const debug_view_state_source &source = downcast<const debug_view_state_source &>(*m_source);
// start with a blank list
reset();
// add a cycles entry: cycles:99999999
m_state_list.emplace_back(REG_CYCLES, "cycles", 8);
// add a beam entry: beamx:1234
m_state_list.emplace_back(REG_BEAMX, "beamx", 4);
// add a beam entry: beamy:5678
m_state_list.emplace_back(REG_BEAMY, "beamy", 4);
// add a beam entry: frame:123456
m_state_list.emplace_back(REG_FRAME, "frame", 6);
// add a flags entry: flags:xxxxxxxx
m_state_list.emplace_back(STATE_GENFLAGS, "flags", source.m_stateintf->state_string_max_length(STATE_GENFLAGS));
// add a divider entry
m_state_list.emplace_back(REG_DIVIDER, "", 0);
// add all registers into it
for (auto &entry : source.m_stateintf->state_entries())
{
if (entry->divider())
m_state_list.emplace_back(REG_DIVIDER, "", 0);
else if (entry->visible())
m_state_list.emplace_back(entry->index(), entry->symbol(), source.m_stateintf->state_string_max_length(entry->index()));
}
// count the entries and determine the maximum tag and value sizes
std::size_t count = 0;
std::size_t maxtaglen = 0;
u8 maxvallen = 0;
for (auto const &item : m_state_list)
{
count++;
maxtaglen = (std::max)(maxtaglen, item.m_symbol.length());
maxvallen = (std::max)(maxvallen, item.value_length());
}
// set the current divider and total cols
m_divider = unsigned(1U + maxtaglen + 1U);
m_total.x = u32(1U + maxtaglen + 2U + maxvallen + 1U);
m_total.y = u32(count);
m_topleft.x = 0;
m_topleft.y = 0;
// no longer need to recompute
m_recompute = false;
}
//-------------------------------------------------
// view_notify - handle notification of updates
// to cursor changes
//-------------------------------------------------
void debug_view_state::view_notify(debug_view_notification type)
{
if (type == VIEW_NOTIFY_SOURCE_CHANGED)
m_recompute = true;
}
//-------------------------------------------------
// view_update - update the contents of the
// register view
//-------------------------------------------------
void debug_view_state::view_update()
{
// if our assumptions changed, revisit them
if (m_recompute)
recompute();
// get cycle count if we have an execute interface
debug_view_state_source const &source(downcast<debug_view_state_source const &>(*m_source));
u64 const total_cycles(source.m_execintf ? source.m_execintf->total_cycles() : 0);
bool const cycles_changed(m_last_update != total_cycles);
// loop over rows
auto it(m_state_list.begin());
screen_device const *const screen(machine().first_screen());
debug_view_char *dest(&m_viewdata[0]);
for (s32 index = 0, limit = m_topleft.y + m_visible.y; (index < limit) || (it != m_state_list.end()); ++index)
{
bool const visible((index >= m_topleft.y) && (index < limit));
u32 col(0);
if (it != m_state_list.end())
{
// advance to the next item
state_item &curitem(*it++);
// update item and get the effective string
std::string valstr;
switch (curitem.index())
{
case REG_DIVIDER:
curitem.m_symbol.clear();
curitem.m_symbol.resize(m_total.x, '-');
break;
case REG_CYCLES:
if (source.m_execintf)
{
curitem.update(source.m_execintf->cycles_remaining(), cycles_changed);
valstr = string_format("%-8d", curitem.value());
}
break;
case REG_BEAMX:
if (screen)
{
curitem.update(screen->hpos(), cycles_changed);
valstr = string_format("%4d", curitem.value());
}
break;
case REG_BEAMY:
if (screen)
{
curitem.update(screen->vpos(), cycles_changed);
valstr = string_format("%4d", curitem.value());
}
break;
case REG_FRAME:
if (screen)
{
curitem.update(screen->frame_number(), cycles_changed);
valstr = string_format("%6d", curitem.value());
}
break;
default:
curitem.update(source.m_stateintf->state_int(curitem.index()), cycles_changed);
valstr = source.m_stateintf->state_string(curitem.index());
}
// if this row is visible, add it to the buffer
if (visible)
{
// see if we changed
const u8 attrib(curitem.changed() ? DCA_CHANGED: DCA_NORMAL);
// build up a string
char temp[256];
u32 len(0);
if (curitem.m_symbol.length() < (m_divider - 1))
{
memset(&temp[len], ' ', m_divider - 1 - curitem.m_symbol.length());
len += m_divider - 1 - curitem.m_symbol.length();
}
memcpy(&temp[len], curitem.m_symbol.c_str(), curitem.m_symbol.length());
len += curitem.m_symbol.length();
temp[len++] = ' ';
temp[len++] = ' ';
memcpy(&temp[len], valstr.c_str(), curitem.value_length());
len += curitem.value_length();
temp[len++] = ' ';
temp[len] = 0;
// copy data
for (u32 effcol = m_topleft.x; (col < m_visible.x) && (effcol < len); ++dest, ++col)
{
dest->byte = temp[effcol++];
dest->attrib = attrib | ((effcol <= m_divider) ? DCA_ANCILLARY : DCA_NORMAL);
}
}
}
// fill the rest with blanks
while (visible && (col < m_visible.x))
{
dest->byte = ' ';
dest->attrib = DCA_NORMAL;
dest++;
col++;
}
}
// remember the last update
m_last_update = total_cycles;
}
//-------------------------------------------------
// state_item - constructor
//-------------------------------------------------
debug_view_state::state_item::state_item(int index, const char *name, u8 valuechars)
: m_lastval(0)
, m_currval(0)
, m_index(index)
, m_vallen(valuechars)
, m_symbol(name)
{
}
//-------------------------------------------------
// update - update value and save previous
//-------------------------------------------------
void debug_view_state::state_item::update(u64 newval, bool save)
{
if (save)
m_lastval = m_currval;
m_currval = newval;
}
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