From 144e4c137c060a1d08dd3eefbf8bcb8fdbb4296a Mon Sep 17 00:00:00 2001
From: "Steven R. Loomis" <srl@icu-project.org>
Date: Fri, 30 Jun 2006 14:42:58 +0000
Subject: [PATCH] ICU-5118 Local Service Hook

X-SVN-Rev: 19782
---
 icu4c/source/common/Makefile.in | 21 ++++++++++++++++++---
 icu4c/source/common/localsvc.h  | 25 +++++++++++++++++++++++++
 icu4c/source/common/rbbi.cpp    |  5 +++++
 3 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 icu4c/source/common/localsvc.h

diff --git a/icu4c/source/common/Makefile.in b/icu4c/source/common/Makefile.in
index 9b651dfc31e..666373cf160 100644
--- a/icu4c/source/common/Makefile.in
+++ b/icu4c/source/common/Makefile.in
@@ -19,8 +19,12 @@ include $(top_builddir)/icudefs.mk
 ## Build directory information
 subdir = common
 
+# for service hook
+LOCALSVC_CPP=localsvc.cpp
+SVC_HOOK_INC=$(top_builddir)/common/svchook.mk
+
 ## Extra files to remove for 'make clean'
-CLEANFILES = *~ $(DEPS) $(IMPORT_LIB) $(MIDDLE_IMPORT_LIB) $(FINAL_IMPORT_LIB)
+CLEANFILES = *~ $(DEPS) $(IMPORT_LIB) $(MIDDLE_IMPORT_LIB) $(FINAL_IMPORT_LIB) $(SVC_HOOK_INC)
 
 ## Target information
 
@@ -90,6 +94,9 @@ DEPS = $(OBJECTS:.o=.d)
 
 -include Makefile.local
 
+-include $(SVC_HOOK_INC)
+
+
 ## List of phony targets
 .PHONY : all all-local install install-local clean clean-local	\
 distclean distclean-local install-library install-headers dist	\
@@ -134,6 +141,14 @@ ifneq ($(MIDDLE_IMPORT_LIB),$(FINAL_IMPORT_LIB))
 endif
 endif
 
+$(SVC_HOOK_INC):
+	@echo generating $@
+	@-test -f $(top_srcdir)/common/$(LOCALSVC_CPP) && ( echo "have $(LOCALSVC_CPP) - U_LOCAL_SERVICE_HOOK=1" ; \
+		echo 'CPPFLAGS +=-DU_LOCAL_SERVICE_HOOK=1' > $@ ; \
+		echo 'OBJECTS += $(LOCALSVC_CPP:%.cpp=%.o)' >> $@ \
+		 ) ; true
+	@echo "# Autogenerated by Makefile" >> $@
+
 install-headers:
 	$(MKINSTALLDIRS) $(DESTDIR)$(includedir)/unicode
 	@for file in $(HEADERS); do \
@@ -148,11 +163,11 @@ clean-local:
 	$(RMV) $(OBJECTS) $(STATIC_OBJECTS) $(ALL_TARGETS) $(SO_VERSION_DATA)
 
 distclean-local: clean-local
-	$(RMV) Makefile icucfg.h unicode/platform.h
+	$(RMV) Makefile icucfg.h unicode/platform.h $(SVC_HOOK_INC)
 
 check-local:
 
-Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
+Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status $(SVC_HOOK_INC)
 	cd $(top_builddir) \
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
diff --git a/icu4c/source/common/localsvc.h b/icu4c/source/common/localsvc.h
new file mode 100644
index 00000000000..67e5a8455ae
--- /dev/null
+++ b/icu4c/source/common/localsvc.h
@@ -0,0 +1,25 @@
+/*
+***************************************************************************
+*   Copyright (C) 2006 International Business Machines Corporation        *
+*   and others. All rights reserved.                                      *
+***************************************************************************
+*/
+
+#ifndef LOCALSVC_H
+#define LOCALSVC_H
+
+#include "unicode/utypes.h"
+
+#if U_LOCAL_SERVICE_HOOK
+/**
+ * Prototype for user-supplied service hook. This function is expected to return
+ * a type of factory object specific to the requested service.
+ * 
+ * @param what service-specific string identifying the specific user hook
+ * @param status error status
+ * @return a service-specific hook, or NULL on failure.
+ */
+U_CAPI void* uprv_svc_hook(const char *what, UErrorCode *status);
+#endif
+
+#endif
diff --git a/icu4c/source/common/rbbi.cpp b/icu4c/source/common/rbbi.cpp
index cddf525bfb2..902c8a2bf67 100644
--- a/icu4c/source/common/rbbi.cpp
+++ b/icu4c/source/common/rbbi.cpp
@@ -30,6 +30,11 @@
 #include "uassert.h"
 #include "uvector.h"
 
+// if U_LOCAL_SERVICE_HOOK is defined, then localsvc.cpp is expected to be included.
+#if U_LOCAL_SERVICE_HOOK
+#include "localsvc.h"
+#endif
+
 U_NAMESPACE_BEGIN