Implemented a proper libk

2024-10-09 16:45:37 +02:00
parent 9ff817b935
commit 95d32f025a
45 changed files with 1713 additions and 1524 deletions
@@ -0,0 +1,63 @@
+#include <fs/impl.h>
+#include <fs/fs.h>
+#include <memory/addresses.h>
+#include <disk/disk.h>
+#include <syscall.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+
+superblock_t* impl_superblock = (superblock_t*)SUPERBLOCK_LOC;
+fsInfo_t* fsInfo = (fsInfo_t*)FS_INFO_LOC;
+
+inode_t* getInode(char* path, dirEntry_t* dentries) {
+    while (dentries->name[0] != '\0') {
+        if (strcmp(dentries->name, path) == 0) break;
+        dentries++;
+    }
+    if (dentries->name[0] == '\0') { return NULL; }
+
+    inode_t* inode = (inode_t*)BOOT_FIRST_INODE_LOC + dentries->id;
+
+    return inode;
+}
+
+uint8_t loadFile(inode_t* inode, void* dest) {
+    uint32_t totalBlocks = BYTES2BLOCKS(inode->sizeBytes);
+    uint32_t offset = 0;
+
+    for (uint8_t i = 0; i < 4 && totalBlocks > 0; i++) {
+        diskRead(inode->extent[i].block * 8, inode->extent[i].length * 8, dest + offset);
+        offset += inode->extent[i].length * FS_BLOCK_SIZE;
+        totalBlocks -= inode->extent[i].length;
+    }
+
+    if (totalBlocks > 0) {
+        // TODO: Indirect extents
+        return 1;
+    }
+
+    return 0;
+}
+
+void initOpenFileTable() {
+    fsInfo->openFileTable = malloc(sizeof(FILE) * MAX_OPEN_FILES);
+    if (fsInfo->openFileTable == NULL) { printf("\e[1MFailed to init file table! Malloc() error.\e[8M"); }
+    memset(fsInfo->openFileTable, 0, sizeof(FILE) * MAX_OPEN_FILES);
+
+    // offset and ptr are unused in these
+    stdin = fsInfo->openFileTable + 0;
+    stdin->_file = 0;
+    stdin->_flag = O_RDONLY;
+
+    stdout = fsInfo->openFileTable + 1;
+    stdout->_file = 1;
+    stdout->_flag = O_WRONLY | O_APPEND;
+
+    stderr = fsInfo->openFileTable + 2;
+    stderr->_file = 2;
+    stderr->_flag = O_WRONLY | O_APPEND;
+
+    fsInfo->openFiles = 3;
+}
+