Move some number-related stuff to a separate header

1 files changed, 31 insertions, 0 deletions

diff --git a/common/alnumeric.h b/common/alnumeric.h
new file mode 100644
index 00000000..fb38bff6
--- /dev/null
+++ b/common/alnumeric.h
@@ -0,0 +1,31 @@
+#ifndef AL_NUMERIC_H
+#define AL_NUMERIC_H
+
+#include <stdint.h>
+
+inline constexpr int64_t operator "" _i64(unsigned long long int n) noexcept { return static_cast<int64_t>(n); }
+inline constexpr uint64_t operator "" _u64(unsigned long long int n) noexcept { return static_cast<uint64_t>(n); }
+
+/** Find the next power-of-2 for non-power-of-2 numbers. */
+inline uint32_t NextPowerOf2(uint32_t value) noexcept
+{
+    if(value > 0)
+    {
+        value--;
+        value |= value>>1;
+        value |= value>>2;
+        value |= value>>4;
+        value |= value>>8;
+        value |= value>>16;
+    }
+    return value+1;
+}
+
+/** Round up a value to the next multiple. */
+inline size_t RoundUp(size_t value, size_t r) noexcept
+{
+    value += r-1;
+    return value - (value%r);
+}
+
+#endif /* AL_NUMERIC_H */