ICU-368 #define U_IOSTREAM_SOURCE to the level of I/O streams support

of the platform (see comment inside headers)

X-SVN-Rev: 1250

icu4c/source/common/unicode/platform.h.in

@@ -24,6 +24,22 @@
 /* Define whether inttypes.h is available */
 #define HAVE_INTTYPES_H @HAVE_INTTYPES_H@
 
+/*
+ * Define what support for C++ streams is available.
+ *     If U_IOSTREAM_SOURCE is set to 199711, then <iostream> is available
+ * (1997711 is the date the ISO/IEC C++ FDIS was published), and then
+ * one should qualify streams using the std namespace in ICU header
+ * files.
+ *     If U_IOSTREAM_SOURCE is set to 198506, then <iostream.h> is
+ * available instead (198506 is the date when Stroustrup published
+ * "An Extensible I/O Facility for C++" at the summer USENIX conference).
+ *     If U_IOSTREAM_SOURCE is 0, then C++ streams are not available and
+ * support for them will be silently suppressed in ICU.
+ *
+ */
+
+#define U_IOSTREAM_SOURCE @U_IOSTREAM_SOURCE@
+
 /* Determines whether specific types are available */
 #define HAVE_INT8_T @HAVE_INT8_T@
 #define HAVE_UINT8_T @HAVE_UINT8_T@

icu4c/source/common/unicode/pos2.h

@@ -6,7 +6,7 @@
 *
 *******************************************************************************
 *
-*  FILE NAME : platform.h
+*  FILE NAME : pos2.h
 *
 *   Date        Name        Description
 *   05/13/98    nos         Creation (content moved here from ptypes.h).
@@ -24,6 +24,22 @@
 /* Define whether inttypes.h is available */
 #define HAVE_INTTYPES_H 0
 
+/*
+ * Define what support for C++ streams is available.
+ *     If U_IOSTREAM_SOURCE is set to 199711, then <iostream> is available
+ * (1997711 is the date the ISO/IEC C++ FDIS was published), and then
+ * one should qualify streams using the std namespace in ICU header
+ * files.
+ *     If U_IOSTREAM_SOURCE is set to 198506, then <iostream.h> is
+ * available instead (198506 is the date when Stroustrup published
+ * "An Extensible I/O Facility for C++" at the summer USENIX conference).
+ *     If U_IOSTREAM_SOURCE is 0, then C++ streams are not available and
+ * support for them will be silently suppressed in ICU.
+ *
+ */
+
+#define U_IOSTREAM_SOURCE 198506
+
 /* Determines whether specific types are available */
 #define HAVE_INT8_T 0
 #define HAVE_UINT8_T 0

icu4c/source/common/unicode/pos400.h

@@ -6,7 +6,7 @@
 *
 *******************************************************************************
 *
-*  FILE NAME : platform.h
+*  FILE NAME : pos400.h
 *
 *   Date        Name        Description
 *   05/13/98    nos         Creation (content moved here from ptypes.h).
@@ -25,6 +25,22 @@
 /* Define whether inttypes.h is available */
 #define HAVE_INTTYPES_H 0
 
+/*
+ * Define what support for C++ streams is available.
+ *     If U_IOSTREAM_SOURCE is set to 199711, then <iostream> is available
+ * (1997711 is the date the ISO/IEC C++ FDIS was published), and then
+ * one should qualify streams using the std namespace in ICU header
+ * files.
+ *     If U_IOSTREAM_SOURCE is set to 198506, then <iostream.h> is
+ * available instead (198506 is the date when Stroustrup published
+ * "An Extensible I/O Facility for C++" at the summer USENIX conference).
+ *     If U_IOSTREAM_SOURCE is 0, then C++ streams are not available and
+ * support for them will be silently suppressed in ICU.
+ *
+ */
+
+#define U_IOSTREAM_SOURCE 198506
+
 /* Determines whether specific types are available */
 #define HAVE_INT8_T 0
 #define HAVE_UINT8_T 0

icu4c/source/common/unicode/pwin32.h

@@ -24,6 +24,22 @@
 /* Define whether inttypes.h is available */
 #define HAVE_INTTYPES_H 0
 
+/*
+ * Define what support for C++ streams is available.
+ *     If U_IOSTREAM_SOURCE is set to 199711, then <iostream> is available
+ * (1997711 is the date the ISO/IEC C++ FDIS was published), and then
+ * one should qualify streams using the std namespace in ICU header
+ * files.
+ *     If U_IOSTREAM_SOURCE is set to 198506, then <iostream.h> is
+ * available instead (198506 is the date when Stroustrup published
+ * "An Extensible I/O Facility for C++" at the summer USENIX conference).
+ *     If U_IOSTREAM_SOURCE is 0, then C++ streams are not available and
+ * support for them will be silently suppressed in ICU.
+ *
+ */
+
+#define U_IOSTREAM_SOURCE 199711
+
 /* Determines whether specific types are available */
 #define HAVE_INT8_T 0
 #define HAVE_UINT8_T 0

icu4c/source/common/unicode/unistr.h

@@ -39,8 +39,13 @@ class UnicodeConverterCPP;
  * UnicodeString are truncated to char, leading to undefined results with
  * anything not in the Latin1 character set.
  */
-class ostream;
+#if U_IOSTREAM_SOURCE >= 199711
+#include <iostream>
+U_COMMON_API std::ostream &operator<<(std::ostream& stream, const UnicodeString& s);
+#elif U_IOSTREAM_SOURCE >= 198506
+#include <iostream.h>
 U_COMMON_API ostream &operator<<(ostream& stream, const UnicodeString& s);
+#endif
 
 /**
  * Unicode String literals in C++.
@@ -1904,7 +1909,12 @@ private:
 
   friend class UnicodeStringStreamer;
   friend class UnicodeConverterCPP;
+#if U_IOSTREAM_SOURCE >= 199711
+  friend U_COMMON_API std::ostream &operator<<(std::ostream& stream, const UnicodeString& s);
+#elif U_IOSTREAM_SOURCE >= 198506
   friend U_COMMON_API ostream &operator<<(ostream& stream, const UnicodeString& s);
+#endif
+
   friend class StringCharacterIterator;
 
   /*