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Update atapio.cpp to use new rather than dumb_alloc, add file_size

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This commit is contained in:
Xnoe 2021-11-27 02:31:23 +00:00
parent ed67adc9c9
commit 15ca13a985
Signed by: xnoe
GPG Key ID: 45AC398F44F0DAFE
2 changed files with 17 additions and 3 deletions
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17
src/kernel/atapio.cpp
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@ -21,10 +21,10 @@ uint16_t sectorsPerFAT;
void init_atapio() {
rootDirEntries = (uint8_t*)dumb_alloc(8192);
FAT1 = (uint16_t*)dumb_alloc(512 * 34);
rootDirEntries = new uint8_t[8192];
FAT1 = (uint16_t*)(new uint8_t[512 * 34]);
uint32_t boot_sector = (uint32_t)dumb_alloc(4096);
uint32_t boot_sector = new uint32_t[1024];
read_sectors(0, 1, (uint8_t*)boot_sector);
countReserved = *((uint16_t*)(boot_sector + 0x0e));
@ -126,3 +126,14 @@ void load_file(char* filename, uint8_t* destination) {
loaded = true;
}
}
uint32_t file_size(char* filename) {
for (int i=0; i<countRDEs; i++) {
bool found = strcmp(rootDirEntries+(i*32), filename, 11);
if (found) {
uint32_t* correctEntry = (uint32_t*)(rootDirEntries+(i*32));
return correctEntry[7];
}
}
return 0;
}

3
src/kernel/atapio.h
View File

@ -7,6 +7,7 @@
#include "types.h"
#include "strings.h"
#include "allocate.h"
#include "global.h"
void init_atapio();
void read_sector(uint32_t address, uint8_t* buffer);
@ -14,4 +15,6 @@ void read_sectors(uint32_t address, int count, uint8_t* buffer);
uint16_t file_exists(char* filename);
void load_file(char* filename, uint8_t* location);
uint32_t file_size(char* filename);
#endif