Add a macro returning the maximum required buffer size for given
integer type.
Signed-off-by: Bartosz Golaszewski <bartekg...@gmail.com>
---
include/libbb.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/libbb.h b/include/libbb.h
index 478c030..a56b684 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -225,6 +225,13 @@ PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
: ((T)1 << (sizeof(T)*8-1)) \
)
+/* Found in systemd, src/basic/macro.h */
+#define DECIMAL_STR_MAX(type) \
+ (2+(sizeof(type) <= 1 ? 3 : \
+ sizeof(type) <= 2 ? 5 : \
+ sizeof(type) <= 4 ? 10 : \
+ sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
+
/* Large file support */
/* Note that CONFIG_LFS=y forces bbox to be built with all common ops
* (stat, lseek etc) mapped to "largefile" variants by libc.
--
2.1.4
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