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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
devfind.c
Device finding template helpers.
***************************************************************************/
#include "emu.h"
//**************************************************************************
// BASE FINDER CLASS
//**************************************************************************
//-------------------------------------------------
// finder_base - constructor
//-------------------------------------------------
finder_base::finder_base(device_t &base, const char *tag)
: m_next(base.register_auto_finder(*this)),
m_base(base),
m_tag(tag)
{
}
//-------------------------------------------------
// ~finder_base - destructor
//-------------------------------------------------
finder_base::~finder_base()
{
}
//-------------------------------------------------
// find_memregion - find memory region
//-------------------------------------------------
void *finder_base::find_memregion(UINT8 width, size_t &length, bool required) const
{
// look up the region and return nullptr if not found
memory_region *region = m_base.memregion(m_tag);
if (region == nullptr)
{
length = 0;
return nullptr;
}
// check the width and warn if not correct
if (region->bytewidth() != width)
{
if (required)
osd_printf_warning("Region '%s' found but is width %d, not %d as requested\n", m_tag, region->bitwidth(), width*8);
length = 0;
return nullptr;
}
// check the length and warn if other than specified
size_t length_found = region->bytes() / width;
if (length != 0 && length != length_found)
{
if (required)
osd_printf_warning("Region '%s' found but has %d bytes, not %d as requested\n", m_tag, region->bytes(), (int)length*width);
length = 0;
return nullptr;
}
// return results
length = length_found;
return region->base();
}
//-------------------------------------------------
// validate_memregion - find memory region
//-------------------------------------------------
bool finder_base::validate_memregion(size_t bytes, bool required) const
{
// make sure we can resolve the full path to the region
size_t bytes_found = 0;
std::string region_fulltag = m_base.subtag(m_tag);
// look for the region
for (device_t &dev : device_iterator(m_base.mconfig().root_device()))
{
for (const rom_entry *romp = rom_first_region(dev); romp != nullptr; romp = rom_next_region(romp))
{
if (rom_region_name(dev, romp) == region_fulltag)
{
bytes_found = ROMREGION_GETLENGTH(romp);
break;
}
}
if (bytes_found != 0)
break;
}
if (bytes_found != 0)
{
// check the length and warn if other than specified
if (bytes != 0 && bytes != bytes_found)
{
osd_printf_warning("Region '%s' found but has %d bytes, not %d as requested\n", m_tag, (int)bytes_found, (int)bytes);
bytes_found = 0;
}
}
return report_missing(bytes_found != 0, "memory region", required);
}
//-------------------------------------------------
// find_memshare - find memory share
//-------------------------------------------------
void *finder_base::find_memshare(UINT8 width, size_t &bytes, bool required) const
{
// look up the share and return nullptr if not found
memory_share *share = m_base.memshare(m_tag);
if (share == nullptr)
return nullptr;
// check the width and warn if not correct
if (width != 0 && share->bitwidth() != width)
{
if (required)
osd_printf_warning("Shared ptr '%s' found but is width %d, not %d as requested\n", m_tag, share->bitwidth(), width);
return nullptr;
}
// return results
bytes = share->bytes();
return share->ptr();
}
//-------------------------------------------------
// report_missing - report missing objects and
// return true if it's ok
//-------------------------------------------------
bool finder_base::report_missing(bool found, const char *objname, bool required) const
{
if (required && strcmp(m_tag, FINDER_DUMMY_TAG)==0)
{
osd_printf_error("Tag not defined for required device\n");
return false;
}
// just pass through in the found case
if (found)
return true;
// otherwise, report
std::string region_fulltag = m_base.subtag(m_tag);
if (required)
osd_printf_error("Required %s '%s' not found\n", objname, region_fulltag.c_str());
else
osd_printf_verbose("Optional %s '%s' not found\n", objname, region_fulltag.c_str());
return !required;
}
void finder_base::printf_warning(const char *format, ...)
{
va_list argptr;
char buffer[1024];
/* do the output */
va_start(argptr, format);
vsnprintf(buffer, 1024, format, argptr);
osd_printf_warning("%s", buffer);
va_end(argptr);
}
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