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Added cheat functions frombcd() and tobcd() to convert numbers to/from

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BCD format. Changed "Activate" to "Set" in the menus.
This commit is contained in:
Aaron Giles 2008-08-19 06:08:24 +00:00
parent 74777c6420
commit de5cd6e5a8
1 changed files with 47 additions and 1 deletions
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48
src/emu/cheat.c
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@ -209,6 +209,8 @@ static astring *quote_astring_expression(astring *string, int isattribute);
static int validate_format(const char *filename, int line, const script_entry *entry);
static UINT64 cheat_variable_get(void *ref);
static void cheat_variable_set(void *ref, UINT64 value);
static UINT64 execute_frombcd(void *ref, UINT32 params, const UINT64 *param);
static UINT64 execute_tobcd(void *ref, UINT32 params, const UINT64 *param);
@ -375,7 +377,7 @@ void *cheat_get_next_menu_entry(running_machine *machine, void *previous, const
else if (cheat->parameter == NULL && cheat->script[SCRIPT_STATE_RUN] == NULL && cheat->script[SCRIPT_STATE_OFF] == NULL)
{
if (state != NULL)
*state = "Activate";
*state = "Set";
if (flags != NULL)
*flags = 0;
}
@ -918,6 +920,8 @@ static cheat_entry *cheat_entry_load(running_machine *machine, const char *filen
sprintf(tempname, "temp%d", curtemp);
symtable_add_register(cheat->symbols, tempname, &cheat->tempvar[curtemp], cheat_variable_get, cheat_variable_set);
}
symtable_add_function(cheat->symbols, "frombcd", NULL, 1, 1, execute_frombcd);
symtable_add_function(cheat->symbols, "tobcd", NULL, 1, 1, execute_tobcd);
/* read the first comment node */
commentnode = xml_get_sibling(cheatnode->child, "comment");
@ -1630,3 +1634,45 @@ static void cheat_variable_set(void *ref, UINT64 value)
{
*(UINT64 *)ref = value;
}
/*-------------------------------------------------
execute_frombcd - convert a value from BCD
-------------------------------------------------*/
static UINT64 execute_frombcd(void *ref, UINT32 params, const UINT64 *param)
{
UINT64 value = param[0];
UINT64 multiplier = 1;
UINT64 result = 0;
while (value != 0)
{
result += (value & 0x0f) * multiplier;
value >>= 4;
multiplier *= 10;
}
return result;
}
/*-------------------------------------------------
execute_tobcd - convert a value to BCD
-------------------------------------------------*/
static UINT64 execute_tobcd(void *ref, UINT32 params, const UINT64 *param)
{
UINT64 value = param[0];
UINT64 result = 0;
UINT8 shift = 0;
while (value != 0)
{
result += (value % 10) << shift;
value /= 10;
shift += 4;
}
return result;
}