From 678e8ec99ac4ae3d9064ac917463efee1a6839dd Mon Sep 17 00:00:00 2001
From: Alan Liu <alansliu@gmail.com>
Date: Tue, 12 Nov 2002 23:44:54 +0000
Subject: [PATCH] ICU-2347 add uenum_openStringEnumeration (private)

X-SVN-Rev: 10229
---
 icu4c/source/common/Makefile.in  |   2 +-
 icu4c/source/common/common.dsp   |   4 ++
 icu4c/source/common/ustrenum.cpp | 106 +++++++++++++++++++++++++++++++
 icu4c/source/common/ustrenum.h   |  27 ++++++++
 4 files changed, 138 insertions(+), 1 deletion(-)
 create mode 100644 icu4c/source/common/ustrenum.cpp
 create mode 100644 icu4c/source/common/ustrenum.h

diff --git a/icu4c/source/common/Makefile.in b/icu4c/source/common/Makefile.in
index 35ca80d1ed4..e81f2ffbb19 100644
--- a/icu4c/source/common/Makefile.in
+++ b/icu4c/source/common/Makefile.in
@@ -66,7 +66,7 @@ brkiter.o brkdict.o ubrk.o dbbi.o dbbi_tbl.o \
 rbbi.o rbbidata.o rbbinode.o rbbirb.o rbbiscan.o rbbisetb.o rbbistbl.o rbbitblb.o \
 unicode.o convert.o utrie.o uset.o cmemory.o caniter.o \
 unifilt.o unifunct.o uniset.o usetiter.o util.o uenum.o \
-icuserv.o iculserv.o icunotif.o
+icuserv.o iculserv.o icunotif.o ustrenum.cpp
 
 STATIC_OBJECTS = $(OBJECTS:.o=.$(STATIC_O))
 
diff --git a/icu4c/source/common/common.dsp b/icu4c/source/common/common.dsp
index 194a98c1620..8c6eb4a6001 100644
--- a/icu4c/source/common/common.dsp
+++ b/icu4c/source/common/common.dsp
@@ -499,6 +499,10 @@ SOURCE=.\ustrcase.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\ustrenum.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=.\ustrfmt.c
 # End Source File
 # Begin Source File
diff --git a/icu4c/source/common/ustrenum.cpp b/icu4c/source/common/ustrenum.cpp
new file mode 100644
index 00000000000..9407ec9ec27
--- /dev/null
+++ b/icu4c/source/common/ustrenum.cpp
@@ -0,0 +1,106 @@
+/*
+**********************************************************************
+* Copyright (c) 2002, International Business Machines
+* Corporation and others.  All Rights Reserved.
+**********************************************************************
+* Author: Alan Liu
+* Created: November 11 2002
+* Since: ICU 2.4
+**********************************************************************
+*/
+#include "unicode/ustring.h"
+#include "unicode/strenum.h"
+#include "uenumimp.h"
+#include "ustrenum.h"
+#include "cstring.h"
+#include "cmemory.h"
+
+#define THIS(en) ((StringEnumeration*)(en->context))
+
+U_CDECL_BEGIN
+
+/**
+ * Wrapper API to make StringEnumeration look like UEnumeration.
+ */
+static void U_CALLCONV
+ustrenum_close(UEnumeration* en) {
+    delete THIS(en);
+    uprv_free(en);
+}
+
+/**
+ * Wrapper API to make StringEnumeration look like UEnumeration.
+ */
+static int32_t U_CALLCONV
+ustrenum_count(UEnumeration* en, UErrorCode* ec) {
+    return THIS(en)->count(*ec);
+}
+
+/**
+ * Wrapper API to make StringEnumeration look like UEnumeration.
+ */
+static const UChar* U_CALLCONV
+ustrenum_unext(UEnumeration* en, int32_t* resultLength, UErrorCode* ec) {
+    const UChar* result = THIS(en)->unext(*ec);
+    *resultLength = (result != NULL) ? u_strlen(result) : 0;
+    return result;
+}
+
+/**
+ * Wrapper API to make StringEnumeration look like UEnumeration.
+ */
+static const char* U_CALLCONV
+ustrenum_next(UEnumeration* en, int32_t* resultLength, UErrorCode* ec) {
+    const char* result = THIS(en)->next(*ec);
+    *resultLength = (result != NULL) ? uprv_strlen(result) : 0;
+    return result;
+}
+
+/**
+ * Wrapper API to make StringEnumeration look like UEnumeration.
+ */
+static void U_CALLCONV
+ustrenum_reset(UEnumeration* en, UErrorCode* ec) {
+    THIS(en)->reset(*ec);
+}
+
+/**
+ * Pseudo-vtable for UEnumeration wrapper around StringEnumeration.
+ * The StringEnumeration pointer will be stored in 'context'.
+ */
+static const UEnumeration TEMPLATE = {
+    NULL,
+    NULL, // store StringEnumeration pointer here
+    ustrenum_close,
+    ustrenum_count,
+    ustrenum_unext,
+    ustrenum_next,
+    ustrenum_reset
+};
+
+U_CDECL_END
+
+/**
+ * Given a StringEnumeration, wrap it in a UEnumeration.  The
+ * StringEnumeration is adopted; after this call, the caller must not
+ * delete it (regardless of error status).
+ */
+U_CAPI UEnumeration* U_EXPORT2
+uenum_openStringEnumeration(StringEnumeration* adopted, UErrorCode* ec) { 
+    UEnumeration* result = NULL;
+    if (U_SUCCESS(*ec) && adopted != NULL) {
+        result = (UEnumeration*) uprv_malloc(sizeof(UEnumeration));
+        if (result == NULL) {
+            *ec = U_MEMORY_ALLOCATION_ERROR;
+        } else {
+            uprv_memcpy(result, &TEMPLATE, sizeof(TEMPLATE));
+            result->context = adopted;
+        }
+    }
+    if (result == NULL) {
+        delete adopted;
+    }
+    return result;
+}
+
+//eof
diff --git a/icu4c/source/common/ustrenum.h b/icu4c/source/common/ustrenum.h
new file mode 100644
index 00000000000..ba3a135f9f4
--- /dev/null
+++ b/icu4c/source/common/ustrenum.h
@@ -0,0 +1,27 @@
+/*
+**********************************************************************
+* Copyright (c) 2002, International Business Machines
+* Corporation and others.  All Rights Reserved.
+**********************************************************************
+* Author: Alan Liu
+* Created: November 11 2002
+* Since: ICU 2.4
+**********************************************************************
+*/
+#ifndef _USTRENUM_H_
+#define _USTRENUM_H_
+
+#include "unicode/uenum.h"
+#include "unicode/strenum.h"
+
+/**
+ * Given a StringEnumeration, wrap it in a UEnumeration.  The
+ * StringEnumeration is adopted; after this call, the caller must not
+ * delete it (regardless of error status).
+ */
+U_CAPI UEnumeration* U_EXPORT2
+uenum_openStringEnumeration(StringEnumeration* adopted, UErrorCode* ec);
+
+/* _USTRENUM_H_ */
+#endif
+/*eof*/