From 5944b9a2e499a9932cb58e09aaeae5a7ea44d843 Mon Sep 17 00:00:00 2001
From: david-on-debian <secret321king3@gmail.com>
Date: Tue, 20 May 2025 20:44:50 -0500
Subject: [PATCH] Upload files to "lib/fs/ramfs"

---
 lib/fs/ramfs/ramfs.c | 190 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 190 insertions(+)
 create mode 100644 lib/fs/ramfs/ramfs.c

diff --git a/lib/fs/ramfs/ramfs.c b/lib/fs/ramfs/ramfs.c
new file mode 100644
index 0000000..026edbd
--- /dev/null
+++ b/lib/fs/ramfs/ramfs.c
@@ -0,0 +1,190 @@
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <fs/ramfs.h>
+
+
+static ramfs_file_t ramfs_files[RAMFS_MAX_FILES];
+static ramfs_directory_t root_directory = { .name = "/", .file_count = 0 };
+
+void ramfs_init()
+{
+    memset(ramfs_files, 0, sizeof(ramfs_files));
+    root_directory.file_count = 0;
+}
+
+ramfs_file_t* ramfs_create_file(const char* name, uint32_t size, uint8_t permissions)
+{
+    for (uint32_t i = 0; i < RAMFS_MAX_FILES; i++) {
+        if (ramfs_files[i].name[0] == '\0') {
+            // Create the file
+            ramfs_file_t* file = &ramfs_files[i];
+            strncpy(file->name, name, RAMFS_MAX_PATH_LEN);
+            file->size = size;
+            file->data = (size > 0) ? malloc(size) : NULL;
+            file->permissions = permissions;
+
+            if (root_directory.file_count < RAMFS_MAX_FILES) {
+                root_directory.files[root_directory.file_count++] = file;
+            }
+
+            return file;
+        }
+    }
+    return NULL;
+}
+
+bool ramfs_delete_file(const char* name)
+{
+    for (uint32_t i = 0; i < root_directory.file_count; i++) {
+        if (strcmp(root_directory.files[i]->name, name) == 0) {
+            free(root_directory.files[i]->data);
+            root_directory.files[i] = root_directory.files[root_directory.file_count - 1];
+            root_directory.file_count--;
+            return true;
+        }
+    }
+    return false;
+}
+
+ramfs_file_t* ramfs_find_file(const char* name)
+{
+    for (uint32_t i = 0; i < root_directory.file_count; i++) {
+        if (strcmp(root_directory.files[i]->name, name) == 0) {
+            return root_directory.files[i];
+        }
+    }
+    return NULL;
+}
+
+bool ramfs_resize_file(const char* name, uint32_t new_size)
+{
+  ramfs_file_t* file = ramfs_find_file(name);
+  if (file)
+  {
+    file->data = realloc(file->data, new_size);
+    file->size = new_size;
+    return true;
+  }
+  return false;
+}
+
+bool ramfs_append_to_file(const char* name, const uint8_t* data, uint32_t data_size)
+{
+  ramfs_file_t* file = ramfs_find_file(name);
+  if (file && (file->permissions & RAMFS_PERM_WRITE))
+  {
+    file->data = realloc(file->data, file->size + data_size + 1);
+    if (!file->data) return false;
+
+    memcpy(file->data + file->size, data, data_size);
+    file->size += data_size;
+    file->data[file->size] = '\0';
+    return true;
+  }
+  return false;
+}
+
+bool ramfs_create_directory(const char* name)
+{
+    if (root_directory.file_count < RAMFS_MAX_FILES) {
+        ramfs_directory_t* dir = (ramfs_directory_t*)malloc(sizeof(ramfs_directory_t));
+        strncpy(dir->name, name, RAMFS_MAX_PATH_LEN);
+        dir->file_count = 0;
+        root_directory.files[root_directory.file_count++] = (ramfs_file_t*)dir;
+        return true;
+    }
+    return false;
+}
+
+bool ramfs_delete_directory(const char* name)
+{
+    for (uint32_t i = 0; i < root_directory.file_count; i++) {
+        if (strcmp(root_directory.files[i]->name, name) == 0) {
+            // Delete the directory (along with its files)
+            ramfs_directory_t* dir = (ramfs_directory_t*)root_directory.files[i];
+            for (uint32_t j = 0; j < dir->file_count; j++) {
+                free(dir->files[j]->data);
+            }
+            free(dir);
+            root_directory.files[i] = root_directory.files[root_directory.file_count - 1];
+            root_directory.file_count--;
+            return true;
+        }
+    }
+    return false;
+}
+
+bool ramfs_check_permissions(const char* name, uint8_t required_permissions)
+{
+    ramfs_file_t* file = ramfs_find_file(name);
+    if (file) {
+        return (file->permissions & required_permissions) == required_permissions;
+    }
+    return false;
+}
+
+void ramfs_list_files()
+{
+    printf("Files in RAMFS:\n");
+    for (uint32_t i = 0; i < root_directory.file_count; i++) {
+        printf("%s (Size: %u bytes)\n", root_directory.files[i]->name, root_directory.files[i]->size);
+    }
+}
+
+void ramfs_list_directories()
+{
+    printf("Directories in RAMFS:\n");
+    for (uint32_t i = 0; i < root_directory.file_count; i++) {
+        if (root_directory.files[i]->data != NULL) {
+            printf("%s\n", root_directory.files[i]->name);
+        }
+    }
+}
+
+bool ramfs_read_file(const char* name, uint8_t* buffer, uint32_t buffer_size)
+{
+  ramfs_file_t* file = ramfs_find_file(name);
+  if (file && (file->permissions & RAMFS_PERM_READ))
+  {
+    uint32_t bytes_to_read = (file->size < buffer_size) ? file->size : buffer_size;
+    memcpy(buffer, file->data, bytes_to_read);
+    return true;
+  }
+  return false;
+}
+
+bool ramfs_write_file(const char* name, const uint8_t* data, uint32_t size)
+{
+  return ramfs_append_to_file(name, data, size);
+}
+
+bool ramfs_overwrite_file(const char* name, const uint8_t* data, uint32_t size)
+{
+    ramfs_file_t* file = ramfs_find_file(name);
+    if (!file || !(file->permissions & RAMFS_PERM_WRITE)) {
+        return false;
+    }
+
+    // Allocate space for data + null terminator
+    uint8_t* new_data = realloc(file->data, size + 1);
+    if (!new_data && size > 0) {
+        return false; // realloc failed
+    }
+
+    file->data = new_data;
+
+    if (size > 0 && data) {
+        memcpy(file->data, data, size);
+    }
+
+    file->data[size] = '\0'; // Ensure null-terminated
+    file->size = size;
+
+    return true;
+}
+