128 lines
2.4 KiB
C
128 lines
2.4 KiB
C
/*
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* fs.c
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* by Reisyukaku / Aurora Wright
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* Copyright (c) 2016 All Rights Reserved
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*/
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#include "fs.h"
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#include "memory.h"
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#include "fatfs/ff.h"
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static FATFS sdFs,
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nandFs;
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u32 mountFs(void)
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{
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if(f_mount(&sdFs, "0:", 1) != FR_OK) return 0;
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f_mount(&nandFs, "1:", 0);
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return 1;
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}
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u32 fileRead(void *dest, const char *path, u32 size)
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{
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FRESULT fr;
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FIL fp;
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unsigned int br = 0;
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fr = f_open(&fp, path, FA_READ);
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if(fr == FR_OK)
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{
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if(!size) size = f_size(&fp);
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fr = f_read(&fp, dest, size, &br);
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}
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f_close(&fp);
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return fr ? 0 : 1;
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}
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u32 fileWrite(const void *buffer, const char *path, u32 size)
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{
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FRESULT fr;
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FIL fp;
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unsigned int br = 0;
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fr = f_open(&fp, path, FA_WRITE | FA_OPEN_ALWAYS);
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if(fr == FR_OK) fr = f_write(&fp, buffer, size, &br);
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f_close(&fp);
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return fr ? 0 : 1;
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}
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u32 fileSize(const char *path)
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{
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FIL fp;
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u32 size = 0;
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if(f_open(&fp, path, FA_READ) == FR_OK)
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size = f_size(&fp);
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f_close(&fp);
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return size;
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}
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u32 fileExists(const char *path)
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{
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FIL fp;
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u32 exists = 0;
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if(f_open(&fp, path, FA_READ) == FR_OK) exists = 1;
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f_close(&fp);
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return exists;
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}
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void firmRead(void *dest, const char *firmFolder)
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{
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char path[48] = "1:/title/00040138/00000000/content";
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memcpy(&path[18], firmFolder, 8);
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DIR dir;
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FILINFO info = { .lfname = NULL };
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f_opendir(&dir, path);
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u32 id = 0;
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//Parse the target directory
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while(f_readdir(&dir, &info) == FR_OK)
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{
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//We've parsed the whole folder
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if(!info.fname[0]) break;
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//Not a cxi
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if(info.fname[9] != 'a' && info.fname[9] != 'A') continue;
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//Convert the .app name to an integer
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u32 tempId = 0;
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for(char *tmp = info.fname; *tmp != '.'; tmp++)
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{
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tempId <<= 4;
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tempId += *tmp > '9' ? *tmp - 'A' + 10 : *tmp - '0';
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}
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//Found a newer cxi
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if(tempId > id) id = tempId;
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}
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f_closedir(&dir);
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//Complete the string with the .app name
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memcpy(&path[34], "/00000000.app", 14);
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//Convert back the .app name from integer to array
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while(id > 0)
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{
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//Last digit of the .app
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static u32 i = 42;
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static const char hexDigits[] = "0123456789ABCDEF";
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path[i--] = hexDigits[id & 0xF];
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id >>= 4;
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}
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fileRead(dest, path, 0);
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} |