Move c/h files implementing/defining standard library stuff into a new libc directory, also standard'ify some parts of the code base (almost entirely #include fixes).

This is to a) to cleanup firmware/common and firmware/include a bit, but also b) for Rockbox as an application which should use the host system's c library and headers, separating makes it easy to exclude our files from the build.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25850 a1c6a512-1295-4272-9138-f99709370657

firmware/libc/include/stdlib.h

@@ -0,0 +1,58 @@
+/*
+ * stdlib.h
+ *
+ * Definitions for common types, variables, and functions.
+ */
+
+#ifndef _STDLIB_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
+#define _STDLIB_H_
+
+#include "_ansi.h"
+
+#define __need_size_t
+#define __need_wchar_t
+#include <stddef.h>
+
+#ifndef NULL
+#define NULL ((void*)0)
+#endif
+
+#define EXIT_FAILURE 1
+#define EXIT_SUCCESS 0
+
+_VOID   _EXFUN(qsort,(_PTR __base, size_t __nmemb, size_t __size, int(*_compar)(const _PTR, const _PTR)));
+
+void *malloc(size_t);
+void *calloc (size_t nmemb, size_t size);
+void free(void *);
+void *realloc(void *, size_t);
+
+#define RAND_MAX INT_MAX
+
+void srand(unsigned int seed);
+int rand(void);
+
+#ifndef ABS
+#if defined(__GNUC__)
+#define ABS(a) ({typeof (a) ___a = (a); ___a < 0 ? -___a: ___a; })
+#else
+#define ABS(a) (((a) < 0) ? -(a) : (a))
+#endif /* __GNUC__ */
+#endif
+
+#define abs(x) ((int)ABS(x))
+#define labs(x) ((long)abs(x))
+
+#ifdef SIMULATOR
+void exit(int status);
+#endif
+
+int atoi (const char *str);
+    
+#ifdef __cplusplus
+}
+#endif
+#endif /* _STDLIB_H_ */