user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

ext2_root/usr/include/bits/posix/posix_string.h

@@ -0,0 +1,59 @@
+
+#ifndef MLIBC_POSIX_STRING_H
+#define MLIBC_POSIX_STRING_H
+
+#include <alloca.h>
+#include <bits/posix/locale_t.h>
+#include <bits/size_t.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __MLIBC_ABI_ONLY
+
+char *strdup(const char *__string);
+char *strndup(const char *__string, size_t __max_size);
+size_t strnlen(const char *__s, size_t __max_size);
+char *strtok_r(char *__restrict __s, const char *__restrict __delim, char **__restrict __ptr);
+char *strsep(char **__stringp, const char *__delim);
+char *strsignal(int __sig);
+char *stpcpy(char *__restrict __dest, const char *__restrict __src);
+char *stpncpy(char *__restrict __dest, const char *__restrict __src, size_t __n);
+void *memccpy(void *__restrict __dest, const void *__restrict __src, int __c, size_t __n);
+
+int strcoll_l(const char *__s1, const char *__s2, locale_t __locale);
+
+char *strerror_l(int __errnum, locale_t __locale);
+
+/* GNU extensions. */
+#if defined(_GNU_SOURCE)
+char *strcasestr(const char *__s1, const char *__s2);
+#define strdupa(x) ({ \
+	const char *__str = (x); \
+	size_t __len = strlen(__str) + 1; \
+	char *__buf = alloca(__len); \
+	(char *) memcpy(__buf, __str, __len); \
+})
+#define strndupa(x, y) ({ \
+	const char *__str = (x); \
+	size_t __len = strnlen(__str, (y)) + 1; \
+	char *__buf = alloca(__len); \
+	__buf[__len - 1] = '\0'; \
+	(char *) memcpy(__buf, __str, __len - 1); \
+})
+void *memrchr(const void *__m, int __c, size_t __n);
+#endif /* defined(_GNU_SOURCE) */
+
+/* BSD extensions */
+size_t strlcpy(char *__d, const char *__s, size_t __n);
+size_t strlcat(char *__d, const char *__s, size_t __n);
+
+#endif /* !__MLIBC_ABI_ONLY */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MLIBC_POSIX_STRING_H */
+