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changeset 12937:dbc0820f9ddc

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search: Avoid #define replacements in C++ mode.
author Bruno Haible <bruno@clisp.org>
date Mon, 08 Mar 2010 01:16:01 +0100
parents 9be4aca41cee
children baf17c6b8bd7
files ChangeLog lib/search.in.h modules/search
diffstat 3 files changed, 108 insertions(+), 30 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2010-03-07  Bruno Haible  <bruno@clisp.org>
 
+	search: Avoid #define replacements in C++ mode.
+	* lib/search.in.h: Include c++defs.h.
+	(_gl_search_compar_fn, _gl_search_action_fn): New types.
+	(tsearch, tfind, tdelete, twalk): In C++, define a namespaced alias
+	symbol.
+	* modules/search (Depends-on): Add c++defs.
+	(Makefile.am): Update search.h rule.
+
 	math: Avoid #define replacements in C++ mode.
 	* lib/math.in.h: Include c++defs.h.
 	(frexp, acosl, asinl, atanl, ceilf, ceill, cosl, expl, floorf, floorl,
--- a/lib/search.in.h
+++ b/lib/search.in.h
@@ -29,30 +29,28 @@
 #define _GL_SEARCH_H
 
 
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
 /* The definition of _GL_ARG_NONNULL is copied here.  */
 
 /* The definition of _GL_WARN_ON_USE is copied here.  */
 
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
 #if @GNULIB_TSEARCH@
 # if @REPLACE_TSEARCH@
-#  define tsearch rpl_tsearch
-#  define tfind rpl_tfind
-#  define tdelete rpl_tdelete
-#  define twalk rpl_twalk
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define tsearch rpl_tsearch
+#   define tfind rpl_tfind
+#   define tdelete rpl_tdelete
+#   define twalk rpl_twalk
+#  endif
 # endif
-# if !@HAVE_TSEARCH@ || @REPLACE_TSEARCH@
 
 /* See <http://www.opengroup.org/susv3xbd/search.h.html>,
        <http://www.opengroup.org/susv3xsh/tsearch.html>
    for details.  */
 
-#  if !@HAVE_TSEARCH@
+# if !@HAVE_TSEARCH@
 typedef enum
 {
   preorder,
@@ -61,27 +59,89 @@
   leaf
 }
 VISIT;
-#  endif
+# endif
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+typedef int (*_gl_search_compar_fn) (const void *, const void *);
+typedef void (*_gl_search_action_fn) (const void *, VISIT, int);
+# ifdef __cplusplus
+}
+# endif
 
 /* Searches an element in the tree *VROOTP that compares equal to KEY.
    If one is found, it is returned.  Otherwise, a new element equal to KEY
    is inserted in the tree and is returned.  */
-extern void * tsearch (const void *key, void **vrootp,
-                       int (*compar) (const void *, const void *))
-     _GL_ARG_NONNULL ((1, 2, 3));
+# if @REPLACE_TSEARCH@
+_GL_FUNCDECL_RPL (tsearch, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (tsearch, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar));
+# else
+#  if !@HAVE_TSEARCH@
+_GL_FUNCDECL_SYS (tsearch, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (tsearch, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar));
+# endif
+_GL_CXXALIASWARN (tsearch);
 
 /* Searches an element in the tree *VROOTP that compares equal to KEY.
    If one is found, it is returned.  Otherwise, NULL is returned.  */
-extern void * tfind (const void *key, void *const *vrootp,
-                     int (*compar) (const void *, const void *))
-     _GL_ARG_NONNULL ((1, 2, 3));
+# if @REPLACE_TSEARCH@
+_GL_FUNCDECL_RPL (tfind, void *,
+                  (const void *key, void *const *vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (tfind, void *,
+                  (const void *key, void *const *vrootp,
+                   _gl_search_compar_fn compar));
+# else
+#  if !@HAVE_TSEARCH@
+_GL_FUNCDECL_SYS (tfind, void *,
+                  (const void *key, void *const *vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+/* Need to cast, because on Cygwin 1.5.x systems, the second parameter is
+                                         void **vrootp.  */
+_GL_CXXALIAS_SYS_CAST (tfind, void *,
+                       (const void *key, void *const *vrootp,
+                        _gl_search_compar_fn compar));
+# endif
+_GL_CXXALIASWARN (tfind);
 
 /* Searches an element in the tree *VROOTP that compares equal to KEY.
    If one is found, it is removed from the tree, and its parent node is
    returned.  Otherwise, NULL is returned.  */
-extern void * tdelete (const void *key, void **vrootp,
-                       int (*compar) (const void *, const void *))
-     _GL_ARG_NONNULL ((1, 2, 3));
+# if @REPLACE_TSEARCH@
+_GL_FUNCDECL_RPL (tdelete, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (tdelete, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar));
+# else
+#  if !@HAVE_TSEARCH@
+_GL_FUNCDECL_SYS (tdelete, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (tdelete, void *,
+                  (const void *key, void **vrootp,
+                   _gl_search_compar_fn compar));
+# endif
+_GL_CXXALIASWARN (tdelete);
 
 /* Perform a depth-first, left-to-right traversal of the tree VROOT.
    The ACTION function is called:
@@ -94,11 +154,23 @@
         pointer to the key,
      2. an indicator which visit of the node this is,
      3. the level of the node in the tree (0 for the root).  */
-extern void twalk (const void *vroot,
-                   void (*action) (const void *, VISIT, int))
-     _GL_ARG_NONNULL ((2));
+# if @REPLACE_TSEARCH@
+_GL_FUNCDECL_RPL (twalk, void,
+                  (const void *vroot, _gl_search_action_fn action)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (twalk, void,
+                  (const void *vroot, _gl_search_action_fn action));
+# else
+#  if !@HAVE_TSEARCH@
+_GL_FUNCDECL_SYS (twalk, void,
+                  (const void *vroot, _gl_search_action_fn action)
+                  _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (twalk, void,
+                  (const void *vroot, _gl_search_action_fn action));
+# endif
+_GL_CXXALIASWARN (twalk);
 
-# endif
 #elif defined GNULIB_POSIXCHECK
 # undef tsearch
 # if HAVE_RAW_DECL_TSEARCH
@@ -123,9 +195,5 @@
 #endif
 
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* _GL_SEARCH_H */
 #endif /* _GL_SEARCH_H */
--- a/modules/search
+++ b/modules/search
@@ -7,6 +7,7 @@
 
 Depends-on:
 arg-nonnull
+c++defs
 include_next
 warn-on-use
 
@@ -18,7 +19,7 @@
 
 # We need the following in order to create <search.h> when the system
 # doesn't have one that works with the given compiler.
-search.h: search.in.h $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+search.h: search.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	$(AM_V_GEN)rm -f $@-t $@ && \
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's|@''HAVE_SEARCH_H''@|$(HAVE_SEARCH_H)|g' \
@@ -28,6 +29,7 @@
 	      -e 's|@''GNULIB_TSEARCH''@|$(GNULIB_TSEARCH)|g' \
 	      -e 's|@''HAVE_TSEARCH''@|$(HAVE_TSEARCH)|g' \
 	      -e 's|@''REPLACE_TSEARCH''@|$(REPLACE_TSEARCH)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
 	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
 	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
 	      < $(srcdir)/search.in.h; \