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add AR code file parser and shit

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This commit is contained in:
Arisotura
2020-08-13 00:20:34 +02:00
parent 28b8f614ee
commit 4cefff2528
7 changed files with 248 additions and 154 deletions
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135
src/AREngine.cpp
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@ -25,119 +25,30 @@
namespace AREngine
{
typedef struct
{
u32 Code[2 * 64]; // TODO: more sensible size for this? allocate on demand?
bool Enabled;
} CheatEntry;
// TODO: more sensible size for this? allocate on demand?
CheatEntry CheatCodes[64];
u32 NumCheatCodes;
void ParseTextCode(char* text, int tlen, u32* code, int clen) // or whatever this should be named?
{
u32 cur_word = 0;
u32 ndigits = 0;
u32 nin = 0;
u32 nout = 0;
char c;
while ((c = *text++) != '\0')
{
u32 val;
if (c >= '0' && c <= '9')
val = c - '0';
else if (c >= 'a' && c <= 'f')
val = c - 'a' + 0xA;
else if (c >= 'A' && c <= 'F')
val = c - 'A' + 0xA;
else
continue;
cur_word <<= 4;
cur_word |= val;
ndigits++;
if (ndigits >= 8)
{
if (nout >= clen)
{
printf("AR: code too long!\n");
return;
}
*code++ = cur_word;
nout++;
ndigits = 0;
cur_word = 0;
}
nin++;
if (nin >= tlen) break;
}
if (nout & 1)
{
printf("AR: code was missing one word\n");
if (nout >= clen)
{
printf("AR: code too long!\n");
return;
}
*code++ = 0;
}
}
// AR code file - frontend is responsible for managing this
ARCodeFile* CodeFile;
bool Init()
{
CodeFile = nullptr;
return true;
}
void DeInit()
{
//
}
void Reset()
{
memset(CheatCodes, 0, sizeof(CheatCodes));
NumCheatCodes = 0;
CodeFile = nullptr;
}
// TODO: acquire codes from a sensible source!
CheatEntry* entry = &CheatCodes[0];
u32* ptr = &entry->Code[0];
/*char* test = R"(9209D09A 00000000
6209B468 00000000
B209B468 00000000
10000672 000003FF
D2000000 00000000
9209D09A 00000000
94000130 FCBF0000
6209B468 00000000
B209B468 00000000
200006B3 00000001
200006B4 00000001
D2000000 00000000
9209D09A 00000000
94000130 FC7F0000
6209B468 00000000
B209B468 00000000
10000672 00000000
D2000000 00000000)";
ParseTextCode(test, entry->Code, 2*64);
printf("PARSED CODE:\n");
for (int i = 0; i < 2*64; i+=2)
{
printf("%08X %08X\n", entry->Code[i], entry->Code[i+1]);
}
entry->Enabled = true;
NumCheatCodes++;*/
void SetCodeFile(ARCodeFile* file)
{
CodeFile = file;
}
@ -147,9 +58,9 @@ D2000000 00000000)";
case ((x)+0x08): case ((x)+0x09): case ((x)+0x0A): case ((x)+0x0B): \
case ((x)+0x0C): case ((x)+0x0D): case ((x)+0x0E): case ((x)+0x0F)
void RunCheat(CheatEntry* entry)
void RunCheat(ARCode& arcode)
{
u32* code = &entry->Code[0];
u32* code = &arcode.Code[0];
u32 offset = 0;
u32 datareg = 0;
@ -166,9 +77,11 @@ void RunCheat(CheatEntry* entry)
for (;;)
{
if (code >= &arcode.Code[arcode.CodeLen])
break;
u32 a = *code++;
u32 b = *code++;
if ((a|b) == 0) break;
u8 op = a >> 24;
@ -179,7 +92,7 @@ void RunCheat(CheatEntry* entry)
if ((op & 0xF0) == 0xE0)
{
for (u32 i = 0; i < b; i += 8)
*code += 2;
code += 2;
}
continue;
@ -428,7 +341,7 @@ void RunCheat(CheatEntry* entry)
if (bytesleft > 0)
{
u8* leftover = (u8*)code;
*code += 2;
code += 2;
if (bytesleft >= 4)
{
NDS::ARM7Write32(dstaddr, *(u32*)leftover); dstaddr += 4;
@ -477,13 +390,19 @@ void RunCheat(CheatEntry* entry)
void RunCheats()
{
// TODO: make it disableable in general
if (!CodeFile) return;
for (u32 i = 0; i < NumCheatCodes; i++)
for (ARCodeCatList::iterator i = CodeFile->Categories.begin(); i != CodeFile->Categories.end(); i++)
{
CheatEntry* entry = &CheatCodes[i];
if (entry->Enabled)
RunCheat(entry);
ARCodeCat& cat = *i;
for (ARCodeList::iterator j = cat.Codes.begin(); j != cat.Codes.end(); j++)
{
ARCode& code = *j;
if (code.Enabled)
RunCheat(code);
}
}
}