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Delete fat12.c

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JeffRuLz 2019-06-20 14:26:32 -05:00 committed by GitHub
parent d034de5aa7
commit b6d30e2192
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1 changed files with 0 additions and 114 deletions
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arm9/src/fat12.c
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@ -1,114 +0,0 @@
#include "fat12.h"
#include <string.h>
#include <malloc.h>
static u32 _getClusterSize(u32 sizebytes)
{
if (sizebytes < 573440)
return 512;
else if (sizebytes < 5472256)
return 2048;
else if (sizebytes < 17301504)
return 4096;
else
return 2048;
}
static u16 _getMaxFiles(u32 sizebytes)
{
if (sizebytes < 573440)
return 16;
else
return 256;
}
//wip
static u16 _getFatz(u32 sizebytes)
{
if (sizebytes <= 0x4000) //16 kb
return 1;
else if (sizebytes <= 0x200000) //2 mb
return 3;
else
return 6;
}
bool initFatHeader(FILE* f)
{
if (!f)
return false;
//get size
fseek(f, 0, SEEK_END);
u32 size = ftell(f);
FATHeader* h = (FATHeader*)malloc(sizeof(FATHeader));
h->BS_JmpBoot[0] = 0xE9;
h->BS_JmpBoot[1] = 0;
h->BS_JmpBoot[2] = 0;
h->BS_OEMName[0] = 'M';
h->BS_OEMName[1] = 'S';
h->BS_OEMName[2] = 'W';
h->BS_OEMName[3] = 'I';
h->BS_OEMName[4] = 'N';
h->BS_OEMName[5] = '4';
h->BS_OEMName[6] = '.';
h->BS_OEMName[7] = '1';
h->BPB_BytesPerSec = 512;
h->BPB_SecPerClus = _getClusterSize(size) / h->BPB_BytesPerSec;
h->BPB_RsvdSecCnt = 1;
h->BPB_NumFATs = 2;
h->BPB_RootEntCnt = _getMaxFiles(size) * 2;
h->BPB_TotSec16 = size / h->BPB_BytesPerSec; //
h->BPB_Media = 0xF8;
h->BPB_FATSz16 = _getFatz(size); //
h->BPB_SecPerTrk = 0;
h->BPB_NumHeads = 0;
h->BPB_HiddSec = 0;
h->BPB_TotSec32 = 0;
h->BS_DrvNum = 2;
h->BS_Reserved1 = 0;
h->BS_BootSig = 0x29;
h->BS_VolID = 305419896;
h->BS_VolLab[0] = 'V';
h->BS_VolLab[1] = 'O';
h->BS_VolLab[2] = 'L';
h->BS_VolLab[3] = 'U';
h->BS_VolLab[4] = 'M';
h->BS_VolLab[5] = 'E';
h->BS_VolLab[6] = 'L';
h->BS_VolLab[7] = 'A';
h->BS_VolLab[8] = 'B';
h->BS_VolLab[9] = 'E';
h->BS_VolLab[10] = 'L';
h->BS_FilSysType[0] = 'F';
h->BS_FilSysType[1] = 'A';
h->BS_FilSysType[2] = 'T';
h->BS_FilSysType[3] = '1';
h->BS_FilSysType[4] = '2';
h->BS_FilSysType[5] = ' ';
h->BS_FilSysType[6] = ' ';
h->BS_FilSysType[7] = ' ';
memset(h->BS_BootCode, 0, 448);
h->BS_BootSign = 0xAA55;
fseek(f, 0, SEEK_SET);
fwrite(h, sizeof(FATHeader), 1, f);
free(h);
return true;
}