From cb2b6ddee27ad5d2e63c1f50cc8af632eea85dc6 Mon Sep 17 00:00:00 2001
From: Laurent MAZET <laurent.mazet@thalesgroup.com>
Date: Mon, 15 Jul 2024 16:53:40 +0200
Subject: [PATCH] add hash during testing

---
 checkers.c |  5 +++++
 function.c | 12 ++++++++++++
 function.h |  4 ++++
 makefile   |  4 +++-
 test.c     |  7 +++++++
 5 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 test.c

diff --git a/checkers.c b/checkers.c
index 92d86f6..4f7c871 100644
--- a/checkers.c
+++ b/checkers.c
@@ -24,6 +24,7 @@ char *boardname = "10x10";
 char *filename = NULL;
 int maxnbrecords = 0;
 int scale = 2;
+int dohash = 0;
 
 int xoffset = 1;
 int yoffset = 1;
@@ -422,6 +423,10 @@ int main (int argc, char *argv[])
 
     endwin ();
 
+    if (dohash) {
+        printf ("hash: 0x%08x\n", computehash (board->tab));
+    }
+
     if (nbrecords) {
         int i;
         printf ("records: ");
diff --git a/function.c b/function.c
index 41a5722..bac2091 100644
--- a/function.c
+++ b/function.c
@@ -1,3 +1,4 @@
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -597,4 +598,15 @@ void freecache (cache_t *cache)
     free (cache);
 }
 
+uint32_t computehash (char *key)
+{
+  uint32_t hash = 3323198485ul;
+  for (;*key;++key) {
+    hash ^= *key;
+    hash *= 0x5bd1e995;
+    hash ^= hash >> 15;
+  }
+  return hash;
+}
+
 /* vim: set ts=4 sw=4 et: */
diff --git a/function.h b/function.h
index 11fc148..e48e4c5 100644
--- a/function.h
+++ b/function.h
@@ -1,6 +1,8 @@
 #ifndef __FUNCTION_H__
 #define __FUNCTION_H__
 
+#include <stdint.h>
+
 #include "type.h"
 
 #define CHECKALLOC(ptr) \
@@ -83,6 +85,8 @@ void emptycache (cache_t *cache);
 
 void freecache (cache_t *cache);
 
+uint32_t computehash (char *key);
+
 #endif /* __FUNCTION_H__ */
 
 /* vim: set ts=4 sw=4 et: */
diff --git a/makefile b/makefile
index 436ffbc..7329ad3 100644
--- a/makefile
+++ b/makefile
@@ -88,7 +88,9 @@ wipe: purge
 	rm -f wipe $(wildcard *.gcda *.gcno *.gcov *.glog)
 	$(call PASS, SUCCESS)
 
-tests: all
+tests: test.o
+	-rm -f $(ALLEXE)
+	LDFLAGS="$$LDFLAGS test.o" $(MAKE) all
 	$(MAKE) $(addprefix test_,$(ALLEXE))
 
 ## Main rules
diff --git a/test.c b/test.c
new file mode 100644
index 0000000..47fa970
--- /dev/null
+++ b/test.c
@@ -0,0 +1,7 @@
+void __attribute__((constructor)) _checker (void)
+{
+    extern int dohash;
+    dohash = 1;
+}
+
+/* vim: set ts=4 sw=4 et: */
-- 
2.30.2