[goffice] Compilation: don't use g_memdup.

[Morten Welinder <mortenw src gnome org>]

commit bd8810cd6a1ffd7a23a2077b5af624479b3458ef
Author: Morten Welinder <terra gnome org>
Date:   Wed Dec 1 21:35:35 2021 -0500

    Compilation: don't use g_memdup.
    
    Dead kittens ohoy!

 ChangeLog                      |  5 +++++
 NEWS                           |  1 +
 goffice/math/go-complex.c      |  2 +-
 goffice/math/go-quad.c         |  2 +-
 goffice/utils/go-glib-extras.c | 21 +++++++++++++++++++++
 goffice/utils/go-glib-extras.h |  2 ++
 goffice/utils/go-line.c        |  2 +-
 goffice/utils/go-pixbuf.c      |  2 +-
 8 files changed, 33 insertions(+), 4 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index e7e5ae3d..84de7864 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2021-12-01  Morten Welinder  <terra gnome org>
+
+       * goffice/utils/go-glib-extras.c (go_memdup): Replacement for
+       g_memdup until we depend on glib 2.67 or thereabouts.
+
 2021-11-06  Morten Welinder  <terra gnome org>
 
        * goffice/math/go-math.c (go_pow10): Make a much bigger table to
diff --git a/NEWS b/NEWS
index 0a774e8f..913edaad 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,7 @@ John Denker:
 Morten:
        * Introspection updates.
        * Improve go_pow10 accuracy by avoiding pow as much as possible.
+       * Take evasive action re g_memdup.
 
 --------------------------------------------------------------------------
 goffice 0.10.50:
diff --git a/goffice/math/go-complex.c b/goffice/math/go-complex.c
index 6375f119..1066a0a1 100644
--- a/goffice/math/go-complex.c
+++ b/goffice/math/go-complex.c
@@ -62,7 +62,7 @@
 static COMPLEX *
 SUFFIX(go_complex_dup) (COMPLEX *src)
 {
-       return g_memdup (src, sizeof (*src));
+       return go_memdup (src, sizeof (*src));
 }
 
 #define MAKE_BOXED_TYPE(id,name)                                       \
diff --git a/goffice/math/go-quad.c b/goffice/math/go-quad.c
index bb77f57a..98b973ea 100644
--- a/goffice/math/go-quad.c
+++ b/goffice/math/go-quad.c
@@ -202,7 +202,7 @@ SUFFIX(go_quad_start) (void)
                        _FPU_EXTENDED | _FPU_DOUBLE | _FPU_SINGLE;
 
                _FPU_GETCW (state);
-               res = g_memdup (&state, sizeof (state));
+               res = go_memdup (&state, sizeof (state));
 
                newstate = (state & ~mask) | _FPU_DOUBLE;
                _FPU_SETCW (newstate);
diff --git a/goffice/utils/go-glib-extras.c b/goffice/utils/go-glib-extras.c
index bb1da232..1a2b54df 100644
--- a/goffice/utils/go-glib-extras.c
+++ b/goffice/utils/go-glib-extras.c
@@ -854,6 +854,27 @@ go_destroy_password (char *passwd)
 }
 
 
+/**
+ * go_memdup:
+ * @mem: (nullable): Memory to copy
+ * @byte_size: size of memory block to copy
+ *
+ * Like g_memdup or g_memdup2.  This function is meant to easy transition
+ * to g_memdup2 without having to require very new glib.
+ **/
+gpointer
+go_memdup (gconstpointer mem, gsize byte_size)
+{
+       if (mem && byte_size != 0) {
+               gpointer new_mem = g_malloc (byte_size);
+               memcpy (new_mem, mem, byte_size);
+               return new_mem;
+       } else
+               return NULL;
+}
+
+
+
 /**
  * go_object_toggle:
  * @object: #GObject
diff --git a/goffice/utils/go-glib-extras.h b/goffice/utils/go-glib-extras.h
index a9b67f97..4424474e 100644
--- a/goffice/utils/go-glib-extras.h
+++ b/goffice/utils/go-glib-extras.h
@@ -89,6 +89,8 @@ char const *go_guess_encoding         (char const *raw, gsize len,
 char const *go_get_real_name           (void);
 void       go_destroy_password (char *passwd);
 
+gpointer    go_memdup (gconstpointer mem, gsize byte_size);
+
 GType        go_mem_chunk_get_type  (void);
 GOMemChunk  *go_mem_chunk_new          (char const *name, gsize user_atom_size, gsize chunk_size);
 void        go_mem_chunk_destroy       (GOMemChunk *chunk, gboolean expect_leaks);
diff --git a/goffice/utils/go-line.c b/goffice/utils/go-line.c
index cc99dc11..e215c63f 100644
--- a/goffice/utils/go-line.c
+++ b/goffice/utils/go-line.c
@@ -507,7 +507,7 @@ go_arrow_init_oval (GOArrow *dst, double ra, double rb)
 GOArrow *
 go_arrow_dup (GOArrow *src)
 {
-       return g_memdup (src, sizeof (*src));
+       return go_memdup (src, sizeof (*src));
 }
 
 gboolean
diff --git a/goffice/utils/go-pixbuf.c b/goffice/utils/go-pixbuf.c
index 97716795..e9ca1ffc 100644
--- a/goffice/utils/go-pixbuf.c
+++ b/goffice/utils/go-pixbuf.c
@@ -394,7 +394,7 @@ go_pixbuf_new_from_data (char const *type, guint8 const *data, gsize length, GEr
        if (!error)
                error = &dummy;
 
-       image->data = g_memdup (data, length);
+       image->data = go_memdup (data, length);
        image->data_length = length;
        g_object_set (image, "image-type", type, NULL);
        go_pixbuf_create_pixbuf (GO_PIXBUF (image), error);