From 870cb82c96d74e93a642296f68319c777359a11d Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Tue, 15 Nov 2022 13:06:59 +0000
Subject: Change all mp_to_ubin() usages to mp_pack(). It makes the code much
 more clear

---
 generic/tclObj.c | 34 ++++++++++------------------------
 1 file changed, 10 insertions(+), 24 deletions(-)

diff --git a/generic/tclObj.c b/generic/tclObj.c
index ce8e610..bad3f85 100644
--- a/generic/tclObj.c
+++ b/generic/tclObj.c
@@ -3124,15 +3124,12 @@ Tcl_GetLongFromObj(
 
 		{
 	    mp_int big;
-	    unsigned long scratch, value = 0;
-	    unsigned char *bytes = (unsigned char *) &scratch;
+	    unsigned long value = 0;
 	    size_t numBytes;
 
 	    TclUnpackBignum(objPtr, big);
-	    if (mp_to_ubin(&big, bytes, sizeof(long), &numBytes) == MP_OKAY) {
-		while (numBytes-- > 0) {
-			value = (value << CHAR_BIT) | *bytes++;
-		}
+	    if (mp_pack(&value, 1,
+			    &numBytes, 0, sizeof(Tcl_WideUInt), 0, 0, &big) == MP_OKAY) {
 		if (big.sign) {
 		    if (value <= 1 + (unsigned long)LONG_MAX) {
 			*longPtr = (long)(-value);
@@ -3364,14 +3361,10 @@ Tcl_GetWideIntFromObj(
 	    mp_int big;
 	    Tcl_WideUInt value = 0;
 	    size_t numBytes;
-	    Tcl_WideInt scratch;
-	    unsigned char *bytes = (unsigned char *) &scratch;
 
 	    TclUnpackBignum(objPtr, big);
-	    if (mp_to_ubin(&big, bytes, sizeof(Tcl_WideInt), &numBytes) == MP_OKAY) {
-		while (numBytes-- > 0) {
-		    value = (value << CHAR_BIT) | *bytes++;
-		}
+	    if (mp_pack(&value, 1,
+			    &numBytes, 0, sizeof(Tcl_WideUInt), 0, 0, &big) == MP_OKAY) {
 		if (big.sign) {
 		    if (value <= 1 + ~(Tcl_WideUInt)WIDE_MIN) {
 			*wideIntPtr = (Tcl_WideInt)(-value);
@@ -3444,21 +3437,18 @@ TclGetWideBitsFromObj(
 	    mp_int big;
 	    mp_err err;
 
-	    Tcl_WideUInt value = 0, scratch;
+	    Tcl_WideUInt value = 0;
 	    size_t numBytes;
-	    unsigned char *bytes = (unsigned char *) &scratch;
 
 	    Tcl_GetBignumFromObj(NULL, objPtr, &big);
 	    err = mp_mod_2d(&big, (int) (CHAR_BIT * sizeof(Tcl_WideInt)), &big);
 	    if (err == MP_OKAY) {
-		err = mp_to_ubin(&big, bytes, sizeof(Tcl_WideInt), &numBytes);
+		err = mp_pack(&value, 1,
+			&numBytes, 0, sizeof(Tcl_WideUInt), 0, 0, &big);
 	    }
 	    if (err != MP_OKAY) {
 		return TCL_ERROR;
 	    }
-	    while (numBytes-- > 0) {
-		value = (value << CHAR_BIT) | *bytes++;
-	    }
 	    *wideIntPtr = !big.sign ? (Tcl_WideInt)value : -(Tcl_WideInt)value;
 	    mp_clear(&big);
 	    return TCL_OK;
@@ -3828,19 +3818,15 @@ Tcl_SetBignumObj(
 {
     Tcl_WideUInt value = 0;
     size_t numBytes;
-    Tcl_WideUInt scratch;
-    unsigned char *bytes = (unsigned char *) &scratch;
     mp_int *bignumValue = (mp_int *) big;
 
     if (Tcl_IsShared(objPtr)) {
 	Tcl_Panic("%s called with shared object", "Tcl_SetBignumObj");
     }
-    if (mp_to_ubin(bignumValue, bytes, sizeof(Tcl_WideUInt), &numBytes) != MP_OKAY) {
+    if (mp_pack(&value, 1,
+		    &numBytes, 0, sizeof(Tcl_WideUInt), 0, 0, bignumValue) != MP_OKAY) {
 	goto tooLargeForWide;
     }
-    while (numBytes-- > 0) {
-	value = (value << CHAR_BIT) | *bytes++;
-    }
     if (value > ((Tcl_WideUInt)WIDE_MAX + bignumValue->sign)) {
 	goto tooLargeForWide;
     }
-- 
cgit v0.12