Commited some old changes, idk what they were

This commit is contained in:
2024-07-30 21:07:05 +02:00
parent 8e004221e1
commit 105076a8ce
14 changed files with 238 additions and 222 deletions
-80
View File
@@ -1,80 +0,0 @@
#ifndef FILESYS_H
#define FILESYS_H
#include <disk/disk.h>
#include <memory/addresses.h>
#include <string.h>
typedef struct {
char filename[10];
char filetype[3];
uint8_t reserved;
uint8_t startAddress;
uint8_t length;
} __attribute__ ((packed)) fileEntry_t;
char* filetable = (char*)FILETABLE_LOC; // Pretty sure we don't have to care about the bootloader at 0x7c00
fileEntry_t* findFile(const char* filename) {
if (strlen(filename) > 14) { return NULL; } // Filename too long
static char filenameBuf[16];
strcpy(filenameBuf, filename);
char* filetype = strchr(filenameBuf, '.');
*filetype++ = '\0'; // Split filename and filetype by a NULL
char* ft = filetable;
while (*ft != '\0') {
if (strcmp(filenameBuf, ft) != 0) { // Filename doesn't match
ft += 16; // Goto next entry
continue;
}
ft += 10; // Goto filetype
if (strcmp(filetype, ft) != 0) {
ft += 6; // Goto next entry
continue;
}
ft -= 10; // Go back to start of entry
return (fileEntry_t*)ft;
}
return NULL; // No such file
}
void updateFiletable() {
// TODO: Update the filetable by writing data from memory to disk!
}
uint8_t readFile(char* filename, void* buffer) { // Hopefully the buffer is large enought :/
fileEntry_t* file = findFile(filename);
if (file == NULL) { return 1; } // File doesn't exist!
diskRead(file->startAddress, file->length, buffer);
return 0; // Success
}
uint8_t writeFile(char* filename, void* buffer) { // TODO: Add length so we don't write too much/too little
fileEntry_t* file = findFile(filetable);
if (file == NULL) { // File exists -> override
// File doesn't exist -> create new file
file = (fileEntry_t*)filetable;
while (*(char*)file != '\0') { file++; } // Find end of the filetable
*strchr(filename, '.') = '\0';
char* filetype = filename + strlen(filename); // + 1?
fileEntry_t* previous = file - 1;
strcpy(file->filename, filename);
strcpy(file->filetype, filetype);
file->startAddress = previous->startAddress + previous->length;
file->length = 1; // TODO: Add lenght! Currently will just assume 1 sector :/
}
diskWrite(file->startAddress, file->length, buffer); // Write the file
return 0; // Success
}
#endif