From b5793d558cadada689358997736a16bcf346a462 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sat, 11 Nov 2017 20:27:43 +0100
Subject: [PATCH] added function to copy file

---
 src/libgame/misc.c | 37 +++++++++++++++++++++++++++++++++++++
 src/libgame/misc.h |  2 ++
 2 files changed, 39 insertions(+)

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index 701d38fb..06ded936 100644
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -2135,6 +2135,8 @@ void dumpList(ListNode *node_first)
 /* functions for file handling                                               */
 /* ------------------------------------------------------------------------- */
 
+#define MAX_BUFFER_SIZE			4096
+
 File *openFile(char *filename, char *mode)
 {
   File *file = checked_calloc(sizeof(File));
@@ -2217,6 +2219,11 @@ size_t readFile(File *file, void *buffer, size_t item_size, size_t num_items)
   return fread(buffer, item_size, num_items, file->file);
 }
 
+size_t writeFile(File *file, void *buffer, size_t item_size, size_t num_items)
+{
+  return fwrite(buffer, item_size, num_items, file->file);
+}
+
 int seekFile(File *file, long offset, int whence)
 {
 #if defined(PLATFORM_ANDROID)
@@ -2286,6 +2293,36 @@ char *getStringFromFile(File *file, char *line, int size)
   return fgets(line, size, file->file);
 }
 
+int copyFile(char *filename_from, char *filename_to)
+{
+  File *file_from, *file_to;
+
+  if ((file_from = openFile(filename_from, MODE_READ)) == NULL)
+  {
+    return -1;
+  }
+
+  if ((file_to = openFile(filename_to, MODE_WRITE)) == NULL)
+  {
+    closeFile(file_from);
+
+    return -1;
+  }
+
+  while (!checkEndOfFile(file_from))
+  {
+    byte buffer[MAX_BUFFER_SIZE];
+    size_t bytes_read = readFile(file_from, buffer, 1, MAX_BUFFER_SIZE);
+
+    writeFile(file_to, buffer, 1, bytes_read);
+  }
+
+  closeFile(file_from);
+  closeFile(file_to);
+
+  return 0;
+}
+
 
 /* ------------------------------------------------------------------------- */
 /* functions for directory handling                                          */
diff --git a/src/libgame/misc.h b/src/libgame/misc.h
index 6c654cb5..078a10f3 100644
--- a/src/libgame/misc.h
+++ b/src/libgame/misc.h
@@ -246,9 +246,11 @@ File *openFile(char *, char *);
 int closeFile(File *);
 int checkEndOfFile(File *);
 size_t readFile(File *, void *, size_t, size_t);
+size_t writeFile(File *, void *, size_t, size_t);
 int seekFile(File *, long, int);
 int getByteFromFile(File *);
 char *getStringFromFile(File *, char *, int);
+int copyFile(char *, char *);
 
 Directory *openDirectory(char *);
 int closeDirectory(Directory *);
-- 
2.34.1