SPDX-FileCopyrightText: 2022 Samuel Tyler <samuel@samuelt.me>

SPDX-License-Identifier: PSF-2.0

This is a nearly-equivalent patch to Python 2.0.1, with nearly
identical reasoning.

Python 2.3's unicode regeneration code is a bit too incompatible
with Python 2.0.1.

--- Python-2.3.7/Objects/unicodectype.c	2022-10-05 18:11:21.989603599 +1100
+++ Python-2.3.7/Objects/unicodectype.c	2022-10-05 18:14:57.335843857 +1100
@@ -29,31 +29,12 @@
     const unsigned char digit;
 } _PyUnicode_TypeRecord;
 
-#include "unicodetype_db.h"
-
-static const _PyUnicode_TypeRecord *
-gettyperecord(Py_UNICODE code)
-{
-    int index;
-
-    if (code >= 0x110000)
-        index = 0;
-    else {
-        index = index1[(code>>SHIFT)];
-        index = index2[(index<<SHIFT)+(code&((1<<SHIFT)-1))];
-    }
-
-    return &_PyUnicode_TypeRecords[index];
-}
-
 /* Returns 1 for Unicode characters having the category 'Zl' or type
    'B', 0 otherwise. */
 
 int _PyUnicode_IsLinebreak(Py_UNICODE ch)
 {
-    const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
-
-    return (ctype->flags & LINEBREAK_MASK) != 0;
+    return 0;
 }
 
 /* Returns the titlecase Unicode characters corresponding to ch or just
@@ -61,18 +42,7 @@
 
 Py_UNICODE _PyUnicode_ToTitlecase(register Py_UNICODE ch)
 {
-    const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
-    int delta;
-
-    if (ctype->title)
-        delta = ctype->title;
-    else
-	delta = ctype->upper;
-
-    if (delta >= 32768)
-	    delta -= 65536;
-
-    return ch + delta;
+    return ch;
 }
 
 /* Returns 1 for Unicode characters having the category 'Lt', 0
@@ -80,9 +50,7 @@
 
 int _PyUnicode_IsTitlecase(Py_UNICODE ch)
 {
-    const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
-
-    return (ctype->flags & TITLE_MASK) != 0;
+    return 0;
 }
 
 /* Returns the integer decimal (0-9) for Unicode characters having
@@ -90,9 +58,7 @@
 
 int _PyUnicode_ToDecimalDigit(Py_UNICODE ch)
 {
-    const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
-
-    return (ctype->flags & DECIMAL_MASK) ? ctype->decimal : -1;
+    return -1;
 }
 
 int _PyUnicode_IsDecimalDigit(Py_UNICODE ch)
@@ -107,9 +73,7 @@
 
 int _PyUnicode_ToDigit(Py_UNICODE ch)
 {
-    const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
-
-    return (ctype->flags & DIGIT_MASK) ? ctype->digit : -1;
+    return -1;
 }
 
 int _PyUnicode_IsDigit(Py_UNICODE ch)
--- Python-2.3.7/Makefile.pre.in	2005-01-12 00:49:02.000000000 +1100
+++ Python-2.3.7/Makefile.pre.in	2022-10-05 18:35:05.979846971 +1100
@@ -456,8 +456,7 @@
 Python/importdl.o: $(srcdir)/Python/importdl.c
 		$(CC) -c $(PY_CFLAGS) -I$(DLINCLDIR) -o $@ $(srcdir)/Python/importdl.c
 
-Objects/unicodectype.o:	$(srcdir)/Objects/unicodectype.c \
-				$(srcdir)/Objects/unicodetype_db.h
+Objects/unicodectype.o:	$(srcdir)/Objects/unicodectype.c
 
 ############################################################################
 # Header files
