add file operation

file.c

@@ -0,0 +1,53 @@
+#include "file.h"
+#include <stdio.h>
+/*
+ * Here we load a file and write the file as string to a memory address:
+ * Input:
+ *      char* fname: the name of the file to open
+ *      int cbSize: the size of the strContent
+ * Output:
+ *      char **strContent: a pointer to a address where you have to allocate enougth memory to store the whole file
+ *      int neededSize: this returns the needed size of the buffer strContent
+ *
+ *  Note:
+ *      to get the size define strContent as NULL, then the needed size will return the needed buffersize
+ *
+ *
+ */
+int getFile(char *fname, char **strContent,int cbSize,long *neededSize)
+{
+    FILE *hfile = fopen(fname,"r");
+    long file_size=0;
+    int ret=0;
+    if(hfile == NULL)
+    {
+        return FILE_ERROR_OPEN;
+    }
+   fseek(hfile,0,SEEK_END);
+   file_size = ftell(hfile);
+    if(strContent == NULL) //we must determine the size and return to neededSize
+    {
+        *neededSize = file_size;
+        fclose(hfile);
+        return NO_ERROR;
+    }
+
+    if(cbSize < file_size)
+    {
+        *neededSize = file_size;
+        fclose(hfile);
+        return FILE_ERROR_STRCONTENT_TO_SMALL;
+    }
+
+    fseek(hfile,0,SEEK_SET);
+    ret=fread(*strContent,file_size,1,hfile);
+    if(ret != 1)
+    {
+        printf("Reading error read and should read missmatch\nnumber written elements:%d\n",
+                ret);
+        fclose(hfile);
+        return FILE_ERROR_READ_MISMATCH;
+    }
+    fclose(hfile);           
+    return NO_ERROR;
+}