From 71e7049f8ea65780583e847f2b3055b519395517 Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Tue, 12 Jul 2016 13:44:26 +0000
Subject: Make hash type changable by compiling with -DTCL_HASH_TYPE=size_t
 (for example). Default (unsigned) cannot be changed in Tcl 8.x, that must
 wait until Tcl 9.

---
 doc/Hash.3        |  2 +-
 generic/tcl.h     |  6 +++++-
 generic/tclHash.c | 12 ++++++------
 generic/tclInt.h  |  2 +-
 generic/tclObj.c  |  4 ++--
 5 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/doc/Hash.3 b/doc/Hash.3
index 4dc3623..aa79b86 100644
--- a/doc/Hash.3
+++ b/doc/Hash.3
@@ -281,7 +281,7 @@ The \fIhashKeyProc\fR member contains the address of a function called to
 calculate a hash value for the key.
 .PP
 .CS
-typedef unsigned int \fBTcl_HashKeyProc\fR(
+typedef TCL_HASH_TYPE \fBTcl_HashKeyProc\fR(
         Tcl_HashTable *\fItablePtr\fR,
         void *\fIkeyPtr\fR);
 .CE
diff --git a/generic/tcl.h b/generic/tcl.h
index 6061ea8..ded8d0b 100644
--- a/generic/tcl.h
+++ b/generic/tcl.h
@@ -1157,11 +1157,15 @@ typedef struct Tcl_DString {
  * Forward declarations of Tcl_HashTable and related types.
  */
 
+#ifndef TCL_HASH_TYPE
+#  define TCL_HASH_TYPE unsigned
+#endif
+
 typedef struct Tcl_HashKeyType Tcl_HashKeyType;
 typedef struct Tcl_HashTable Tcl_HashTable;
 typedef struct Tcl_HashEntry Tcl_HashEntry;
 
-typedef unsigned (Tcl_HashKeyProc) (Tcl_HashTable *tablePtr, void *keyPtr);
+typedef TCL_HASH_TYPE (Tcl_HashKeyProc) (Tcl_HashTable *tablePtr, void *keyPtr);
 typedef int (Tcl_CompareHashKeysProc) (void *keyPtr, Tcl_HashEntry *hPtr);
 typedef Tcl_HashEntry * (Tcl_AllocHashEntryProc) (Tcl_HashTable *tablePtr,
 	void *keyPtr);
diff --git a/generic/tclHash.c b/generic/tclHash.c
index 3ea9dd9..ac9d40e 100644
--- a/generic/tclHash.c
+++ b/generic/tclHash.c
@@ -43,7 +43,7 @@
 
 static Tcl_HashEntry *	AllocArrayEntry(Tcl_HashTable *tablePtr, void *keyPtr);
 static int		CompareArrayKeys(void *keyPtr, Tcl_HashEntry *hPtr);
-static unsigned int	HashArrayKey(Tcl_HashTable *tablePtr, void *keyPtr);
+static TCL_HASH_TYPE	HashArrayKey(Tcl_HashTable *tablePtr, void *keyPtr);
 
 /*
  * Prototypes for the one word hash key methods. Not actually declared because
@@ -65,7 +65,7 @@ static unsigned int	HashOneWordKey(Tcl_HashTable *tablePtr, void *keyPtr);
 static Tcl_HashEntry *	AllocStringEntry(Tcl_HashTable *tablePtr,
 			    void *keyPtr);
 static int		CompareStringKeys(void *keyPtr, Tcl_HashEntry *hPtr);
-static unsigned int	HashStringKey(Tcl_HashTable *tablePtr, void *keyPtr);
+static TCL_HASH_TYPE	HashStringKey(Tcl_HashTable *tablePtr, void *keyPtr);
 
 /*
  * Function prototypes for static functions in this file:
@@ -774,7 +774,7 @@ CompareArrayKeys(
  *----------------------------------------------------------------------
  */
 
-static unsigned int
+static TCL_HASH_TYPE
 HashArrayKey(
     Tcl_HashTable *tablePtr,	/* Hash table. */
     void *keyPtr)		/* Key from which to compute hash value. */
@@ -787,7 +787,7 @@ HashArrayKey(
 	    count--, array++) {
 	result += *array;
     }
-    return result;
+    return (TCL_HASH_TYPE) result;
 }
 
 /*
@@ -870,7 +870,7 @@ CompareStringKeys(
  *----------------------------------------------------------------------
  */
 
-static unsigned
+static TCL_HASH_TYPE
 HashStringKey(
     Tcl_HashTable *tablePtr,	/* Hash table. */
     void *keyPtr)		/* Key from which to compute hash value. */
@@ -916,7 +916,7 @@ HashStringKey(
 	    result += (result << 3) + UCHAR(c);
 	}
     }
-    return result;
+    return (TCL_HASH_TYPE) result;
 }
 
 /*
diff --git a/generic/tclInt.h b/generic/tclInt.h
index c01b0c1..33476ed 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -3977,7 +3977,7 @@ MODULE_SCOPE int	TclObjCallVarTraces(Interp *iPtr, Var *arrayPtr,
 
 MODULE_SCOPE int	TclCompareObjKeys(void *keyPtr, Tcl_HashEntry *hPtr);
 MODULE_SCOPE void	TclFreeObjEntry(Tcl_HashEntry *hPtr);
-MODULE_SCOPE unsigned	TclHashObjKey(Tcl_HashTable *tablePtr, void *keyPtr);
+MODULE_SCOPE TCL_HASH_TYPE TclHashObjKey(Tcl_HashTable *tablePtr, void *keyPtr);
 
 MODULE_SCOPE int	TclFullFinalizationRequested(void);
 
diff --git a/generic/tclObj.c b/generic/tclObj.c
index 776b034..0cd7839 100644
--- a/generic/tclObj.c
+++ b/generic/tclObj.c
@@ -4048,7 +4048,7 @@ TclFreeObjEntry(
  *----------------------------------------------------------------------
  */
 
-unsigned int
+TCL_HASH_TYPE
 TclHashObjKey(
     Tcl_HashTable *tablePtr,	/* Hash table. */
     void *keyPtr)		/* Key from which to compute hash value. */
@@ -4098,7 +4098,7 @@ TclHashObjKey(
 	    result += (result << 3) + UCHAR(*++string);
 	}
     }
-    return result;
+    return (TCL_HASH_TYPE) result;
 }
 
 /*
-- 
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