lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/mlibc/options/internal/include/bits/ensure.h b/lib/mlibc/options/internal/include/bits/ensure.h
new file mode 100644
index 0000000..f75a2e9
--- /dev/null
+++ b/lib/mlibc/options/internal/include/bits/ensure.h
@@ -0,0 +1,45 @@
+
+#ifndef MLIBC_ENSURE_H
+#define MLIBC_ENSURE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __MLIBC_ABI_ONLY
+
+void __ensure_fail(const char *assertion, const char *file, unsigned int line,
+		const char *function);
+
+void __ensure_warn(const char *assertion, const char *file, unsigned int line,
+		const char *function);
+
+#endif /* !__MLIBC_ABI_ONLY */
+
+#define __ensure(assertion) do { if(!(assertion)) \
+		__ensure_fail(#assertion, __FILE__, __LINE__, __func__); } while(0)
+
+#define MLIBC_UNIMPLEMENTED() __ensure_fail("Functionality is not implemented", \
+		__FILE__, __LINE__, __func__)
+
+#define MLIBC_MISSING_SYSDEP() __ensure_warn("Library function fails due to missing sysdep", \
+		__FILE__, __LINE__, __func__)
+
+#define MLIBC_CHECK_OR_ENOSYS(sysdep, ret) ({ \
+			if (!(sysdep)) { \
+				__ensure_warn("Library function fails due to missing sysdep", \
+					__FILE__, __LINE__, __func__); \
+				errno = ENOSYS; \
+				return (ret); \
+			} \
+			sysdep; \
+		})
+
+#define MLIBC_STUB_BODY { MLIBC_UNIMPLEMENTED(); __builtin_unreachable(); }
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // MLIBC_ENSURE_H
+