Freestanding headers

kernel/std/include/limits.h

@@ -0,0 +1,93 @@
+/* Copyright (C) 2022-2025 Mintsuki and contributors.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __FREESTND_C_HDRS_LIMITS_H
+#define __FREESTND_C_HDRS_LIMITS_H 1
+
+#undef CHAR_BIT
+#define CHAR_BIT __CHAR_BIT__
+
+#ifndef MB_LEN_MAX
+#   define MB_LEN_MAX 1
+#endif
+
+#undef SCHAR_MAX
+#define SCHAR_MAX __SCHAR_MAX__
+#undef SCHAR_MIN
+#define SCHAR_MIN (-SCHAR_MAX - 1)
+
+#undef UCHAR_MAX
+#if __SCHAR_MAX__ == __INT_MAX__
+#   define UCHAR_MAX (SCHAR_MAX * 2U + 1U)
+#else
+#   define UCHAR_MAX (SCHAR_MAX * 2 + 1)
+#endif
+
+#ifdef __CHAR_UNSIGNED__
+#   undef CHAR_MAX
+#   define CHAR_MAX UCHAR_MAX
+#   undef CHAR_MIN
+#   if __SCHAR_MAX__ == __INT_MAX__
+#       define CHAR_MIN 0U
+#   else
+#       define CHAR_MIN 0
+#   endif
+#else
+#   undef CHAR_MAX
+#   define CHAR_MAX SCHAR_MAX
+#   undef CHAR_MIN
+#   define CHAR_MIN SCHAR_MIN
+#endif
+
+#undef SHRT_MAX
+#define SHRT_MAX __SHRT_MAX__
+#undef SHRT_MIN
+#define SHRT_MIN (-SHRT_MAX - 1)
+
+#undef USHRT_MAX
+#if __SHRT_MAX__ == __INT_MAX__
+#   define USHRT_MAX (SHRT_MAX * 2U + 1U)
+#else
+#   define USHRT_MAX (SHRT_MAX * 2 + 1)
+#endif
+
+#undef INT_MAX
+#define INT_MAX __INT_MAX__
+#undef INT_MIN
+#define INT_MIN (-INT_MAX - 1)
+
+#undef UINT_MAX
+#define UINT_MAX (INT_MAX * 2U + 1U)
+
+#undef LONG_MAX
+#define LONG_MAX __LONG_MAX__
+#undef LONG_MIN
+#define LONG_MIN (-LONG_MAX - 1L)
+
+#undef ULONG_MAX
+#define ULONG_MAX (LONG_MAX * 2UL + 1UL)
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+
+#undef LLONG_MAX
+#define LLONG_MAX __LONG_LONG_MAX__
+#undef LLONG_MIN
+#define LLONG_MIN (-LLONG_MAX - 1LL)
+
+#undef ULLONG_MAX
+#define ULLONG_MAX (LLONG_MAX * 2ULL + 1ULL)
+
+#endif
+
+#endif