From e8338d011d6c5ec33fe59d821b279a0a13cd9547 Mon Sep 17 00:00:00 2001
From: lisk77 <lisk77@protonmail.com>
Date: Sun, 17 Aug 2025 17:07:16 +0200
Subject: [PATCH] feat(file): added empty file creation and slicing a file

---
 include/file.h |  2 ++
 src/file.c     | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/file.h b/include/file.h
index 405e18d..79fcb10 100644
--- a/include/file.h
+++ b/include/file.h
@@ -11,6 +11,8 @@ typedef struct {
     uint64_t lines;
 } File;
 
+File* new_empty_file();
 File* new_file(const char*);
+File* slice_file(File*, uint64_t, uint64_t);
 
 #endif // FILE_H
diff --git a/src/file.c b/src/file.c
index b442f46..8c32129 100644
--- a/src/file.c
+++ b/src/file.c
@@ -1,5 +1,13 @@
 #include "file.h"
 
+File* new_empty_file() {
+    File* file = calloc(1, sizeof(File));
+    file->content = NULL;
+    file->lines = 0;
+
+    return file;
+}
+
 File* new_file(const char* path) {
     if (!path) return NULL;
     FILE* f = fopen(path, "rb");
@@ -45,3 +53,17 @@ File* new_file(const char* path) {
 
     return file;
 }
+
+File* slice_file(File* original, uint64_t start, uint64_t end) {
+    if (!original || (end < start) || (end > original->lines)) return NULL;
+
+    File* slice = calloc(1, sizeof(File));
+    if (!slice) return NULL;
+
+    uint64_t lines = end-start;
+    if (!original->content || lines == 0) return NULL;
+
+    slice->content = original->content + start;
+    slice->lines = lines;
+    return slice;
+}