GHash: add BLI_ghashutil_uinthash_v4 for hashing 4 ints at once

2 files changed, 19 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_ghash.h b/source/blender/blenlib/BLI_ghash.h
index 1e51bd9afea..d762876a55a 100644
--- a/source/blender/blenlib/BLI_ghash.h
+++ b/source/blender/blenlib/BLI_ghash.h
@@ -132,6 +132,12 @@ int             BLI_ghashutil_strcmp(const void *a, const void *b);
                 CHECK_TYPE_INLINE(key, int), \
                 BLI_ghashutil_uinthash((unsigned int)key))
 unsigned int    BLI_ghashutil_uinthash(unsigned int key);
+#define         BLI_ghashutil_inthash_v4(key) ( \
+                CHECK_TYPE_INLINE(key, int *), \
+                BLI_ghashutil_uinthash_v4((const unsigned int *)key))
+unsigned int    BLI_ghashutil_uinthash_v4(const unsigned int key[4]);
+#define         BLI_ghashutil_inthash_v4_p \
+   ((GSetHashFP)BLI_ghashutil_uinthash_v4)
 unsigned int    BLI_ghashutil_inthash_p(const void *ptr);
 int             BLI_ghashutil_intcmp(const void *a, const void *b);
 
diff --git a/source/blender/blenlib/intern/BLI_ghash.c b/source/blender/blenlib/intern/BLI_ghash.c
index 33a3ba30e4b..4849ef3e958 100644
--- a/source/blender/blenlib/intern/BLI_ghash.c
+++ b/source/blender/blenlib/intern/BLI_ghash.c
@@ -679,6 +679,19 @@ int BLI_ghashutil_ptrcmp(const void *a, const void *b)
 		return (a < b) ? -1 : 1;
 }
 
+unsigned int BLI_ghashutil_uinthash_v4(const unsigned int key[4])
+{
+	unsigned int hash;
+	hash  = key[0];
+	hash *= 37;
+	hash += key[1];
+	hash *= 37;
+	hash += key[2];
+	hash *= 37;
+	hash += key[3];
+	return hash;
+}
+
 unsigned int BLI_ghashutil_uinthash(unsigned int key)
 {
 	key += ~(key << 16);