From 62992863489a42a21a5af965a7b9923ac7ef0941 Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Mon, 1 Aug 2011 01:12:58 +0200
Subject: [PATCH] Two utility functions to read/write small files

---
 firmware/filesystem/ff.h   |  2 ++
 firmware/filesystem/util.c | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/firmware/filesystem/ff.h b/firmware/filesystem/ff.h
index 352ed5c..611a703 100644
--- a/firmware/filesystem/ff.h
+++ b/firmware/filesystem/ff.h
@@ -332,6 +332,8 @@ int ff_del_syncobj (_SYNC_t);		/* Delete a sync object */
 #define FILENAMELEN 13 // 8+1+3+1
 const char* f_get_rc_string (FRESULT rc);
 void fsInit();
+int readFile(char * filename, char * data, int len);
+int writeFile(char * filename, char * data, int len);
 
 #ifdef __cplusplus
 }
diff --git a/firmware/filesystem/util.c b/firmware/filesystem/util.c
index 7e635ad..d5cc5d0 100644
--- a/firmware/filesystem/util.c
+++ b/firmware/filesystem/util.c
@@ -22,3 +22,41 @@ const char* f_get_rc_string (FRESULT rc) {
 void fsInit(){
     f_mount(0, &FatFs);
 };
+
+int readFile(char * filename, char * data, int len){
+    FIL file;
+    UINT readbytes;
+    int res;
+
+    res=f_open(&file, filename, FA_OPEN_EXISTING|FA_READ);
+    if(res){
+        return -1;
+    };
+
+    res = f_read(&file, data, len-1, &readbytes);
+    if(res){
+        return -1;
+    };
+
+    data[readbytes]=0;
+	return readbytes;
+};
+
+int writeFile(char * filename, char * data, int len){
+    FIL file;
+    UINT writebytes;
+    int res;
+
+	res=f_open(&file, filename, FA_OPEN_ALWAYS|FA_WRITE);
+    if(res){
+        return -1;
+    };
+
+    res = f_write(&file, data, len, &writebytes);
+    if(res){
+        return -1;
+    };
+
+	return writebytes;
+};
+