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new d1191e0ad01 include/limits.h: Add LONG_BIT and WORD_BIT.
d1191e0ad01 is described below
commit d1191e0ad0167ac8fbad8bc5edcfcda5d856201d
Author: Marco Casaroli <[email protected]>
AuthorDate: Thu Nov 5 09:15:06 2026 +0100
include/limits.h: Add LONG_BIT and WORD_BIT.
POSIX (XSI) defines LONG_BIT and WORD_BIT in <limits.h>: the number of
bits in a long and in an int. Programs use them to size bit masks and
bit arrays. NuttX does not define them.
Derive the values from LONG_MAX and INT_MAX of the architecture, so
that they are correct for ILP32, LP64 and the targets with a 16-bit
int. The values work in #if.
Assisted-by: Claude Code:claude-opus-5-5
Signed-off-by: Marco Casaroli <[email protected]>
---
include/limits.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/limits.h b/include/limits.h
index 8ae80cec664..75b5d1fd217 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -193,6 +193,20 @@
# define CLOCK_MAX LLONG_MAX
#endif
+/* The number of bits in a long and in an int (XSI) */
+
+#if LONG_MAX > 2147483647L
+# define LONG_BIT 64
+#else
+# define LONG_BIT 32
+#endif
+
+#if INT_MAX > 32767
+# define WORD_BIT 32
+#else
+# define WORD_BIT 16
+#endif
+
/* Other invariant values */
/* CHARCLASS_NAME_MAX
