add numerical recipes library

2025-09-12 18:55:25 +09:00
parent d4dff245bd
commit 2c75620ec9
1344 changed files with 63869 additions and 0 deletions
--- a/lib/nr/cpp/recipes/icrc1.cpp
+++ b/lib/nr/cpp/recipes/icrc1.cpp
@@ -0,0 +1,15 @@
+#include "nr.h"
+
+unsigned short NR::icrc1(const unsigned short crc, const unsigned char onech)
+{
+	int i;
+	unsigned short ans=(crc ^ onech << 8);
+
+	for (i=0;i<8;i++) {
+		if (ans & 0x8000)
+			ans = (ans <<= 1) ^ 4129;
+		else
+			ans <<= 1;
+	}
+	return ans;
+}