kernel: make all sizes unsigned, sort out the sign mess

1 files changed, 6 insertions, 0 deletions

diff --git a/src/kernel/util.h b/src/kernel/util.h
index 9b8cb3d..0e57d67 100644
--- a/src/kernel/util.h
+++ b/src/kernel/util.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <stddef.h>
+#include <stdint.h>
 
 #define __NUM2STR(x) #x
 #define NUM2STR(x)  __NUM2STR(x)
@@ -13,3 +14,8 @@
 		typeof (a) _a = (a); \
 		typeof (b) _b = (b); \
 		_a > _b ? _a : _b; })
+
+/* casts an uint32_t to int32_t, capping it at INT32_MAX instead of overflowing */
+static inline int32_t capped_cast32(uint32_t u) {
+	return (int32_t)min(u, (uint32_t)INT32_MAX);
+}