Reworked unit tests for machine and renamed test_programs directory

test/userlib/libnachos.h

@@ -0,0 +1,87 @@
+/*! \file libnachos.h
+    \brief Function structures for programs 
+   
+  	Libnachos proposes several 'libc-like' functions
+	for:
+  		Input-Output operations,
+  		String operations,
+  		Memory operations,
+        System calls are defined in kernel/syscalls.h
+
+	Nachos-libc functions are prefixed by 'n' to avoid
+	any confusion with standard libc functions.
+  
+ * -----------------------------------------------------
+ * This file is part of the Nachos-RiscV distribution
+ * Copyright (c) 2022 University of Rennes 1.
+ * 
+ * This program is free software: you can redistribute it and/or modify  
+ * it under the terms of the GNU General Public License as published by  
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+ * General Public License for more details 
+ * (see see <http://www.gnu.org/licenses/>).
+ * -----------------------------------------------------
+*/
+
+#include "userlib/syscall.h"
+
+typedef void (*VoidNoArgFunctionPtr)(); 
+typedef unsigned int size_t;
+
+// Thread management
+// ----------------------------
+ThreadId threadCreate(char * debug_name, VoidNoArgFunctionPtr func);
+
+// Input/Output operations :
+// ------------------------------------
+
+// Print on the standard output specified parameters.
+void n_printf(const char *format, ...);
+
+// Format <buff> (of max length <len>) according to the format <format>
+int n_snprintf(char * buff, int len, const char *format, ...);
+
+// Read an integer on the standard input
+int n_read_int(void);
+
+// String operations :
+// -------------------
+
+// Compare two strings byte by byte.
+int n_strcmp(const char *s1, const char *s2);
+
+// Copy a string.
+char* n_strcpy(char *dst, const char *src);
+
+// Return the number of bytes in a string.
+size_t n_strlen(const char *s);
+
+// appends a copy of a string, to the end of another string.
+char* n_strcat(char *dst, const char *src);
+
+// Return a upper-case letter, 
+// equivalent to the lower-case letter given. 
+int n_toupper(int c);
+
+// Return a lower-case letter, 
+// equivalent to the upper-case letter given. 
+int n_tolower(int c);
+
+// Convert a string in integer.
+int n_atoi(const char *str);
+
+// Concerning memory area operations :
+// -----------------------------------
+
+// Compare two memory area, looking at the first n bytes .
+int n_memcmp(const void *s1, const void *s2, size_t n);
+
+// Copy n byte from an memory area to another.
+void* n_memcpy(void *s1, const void *s2, size_t n);
+
+// Set the first n bytes in a memory area to a specified value.
+void* n_memset(void *s, int c, size_t n);