test program that tries to extract XMP metadata from files (image files,

2005-03-04  Raphael Quinet  <raphael@gimp.org>

	* plug-ins/metadata/xmpdump.c: test program that tries to extract
	XMP metadata from files (image files, AI files, PDF documents...)

ChangeLog

@@ -1,5 +1,8 @@
 2005-03-04  Raphaël Quinet  <raphael@gimp.org>
 
+	* plug-ins/metadata/xmpdump.c: test program that tries to extract
+	XMP metadata from files (image files, AI files, PDF documents...)
+
 	* menus/image-menu.xml.in: Added placeholder for file properties.
 
 	* plug-ins/metadata/.cvsignore

plug-ins/metadata/xmpdump.c

@@ -0,0 +1,160 @@
+/* simple program to test the XMP parser on files given on the command line */
+
+#include <stdio.h>
+#include <string.h>
+#include <glib/gprintf.h>
+#include "xmp-parse.h"
+
+static gpointer
+start_schema (XMPParseContext     *context,
+              const gchar         *ns_uri,
+              const gchar         *ns_prefix,
+              gpointer             user_data,
+              GError             **error)
+{
+  printf ("Schema %s = \"%s\"\n", ns_prefix, ns_uri);
+  return (gpointer) ns_prefix;
+}
+
+static void
+end_schema (XMPParseContext     *context,
+            gpointer             user_ns_data,
+            gpointer             user_data,
+            GError             **error)
+{
+  /* printf ("End of %s\n", user_ns_prefix); */
+}
+
+static void
+set_property (XMPParseContext     *context,
+              const gchar         *name,
+              XMPParseType         type,
+              const gchar        **value,
+              gpointer             user_ns_data,
+              gpointer             user_data,
+              GError             **error)
+{
+  const gchar *ns_prefix = user_ns_data;
+  int          i;
+
+  switch (type)
+    {
+    case XMP_PTYPE_TEXT:
+      printf ("\t%s:%s = \"%s\"\n", ns_prefix, name,
+              value[0]);
+      break;
+
+    case XMP_PTYPE_RESOURCE:
+      printf ("\t%s:%s @ = \"%s\"\n", ns_prefix, name,
+              value[0]);
+      break;
+
+    case XMP_PTYPE_ORDERED_LIST:
+    case XMP_PTYPE_UNORDERED_LIST:
+      printf ("\t%s:%s [] =", ns_prefix, name);
+      for (i = 0; value[i] != NULL; i++)
+        if (i == 0)
+          printf (" \"%s\"", value[i]);
+      else
+          printf (", \"%s\"", value[i]);
+      printf ("\n");
+      break;
+
+    case XMP_PTYPE_ALT_LANG:
+      for (i = 0; value[i] != NULL; i += 2)
+        printf ("\t%s:%s [lang:%s] = \"%s\"\n", ns_prefix, name,
+                value[i], value[i + 1]);
+      break;
+
+    case XMP_PTYPE_STRUCTURE:
+      printf ("\tLocal schema %s = \"%s\"\n", value[0], value[1]);
+      for (i = 2; value[i] != NULL; i += 2)
+        printf ("\t%s:%s [%s] = \"%s\"\n", ns_prefix, name,
+                value[i], value[i + 1]);
+      break;
+
+    default:
+      printf ("\t%s:%s = ?\n", ns_prefix, name);
+      break;
+    }
+}
+
+static void
+print_error (XMPParseContext *context,
+             GError          *error,
+             gpointer         user_data)
+{
+  gchar *filename = user_data;
+
+  fprintf (stderr, "While parsing XMP metadata in %s:\n%s\n",
+           filename, error->message);
+}
+
+static XMPParser xmp_parser = {
+  start_schema,
+  end_schema,
+  set_property,
+  print_error
+};
+
+static int
+scan_file (const gchar *filename)
+{
+  gchar *contents;
+  gsize  length;
+  GError *error;
+  XMPParseContext *context;
+
+  printf ("\nFile: %s\n", filename);
+  error = NULL;
+  if (!g_file_get_contents (filename,
+                            &contents,
+                            &length,
+                            &error))
+    {
+      print_error (NULL, error, (gpointer) filename);
+      g_error_free (error);
+      return 1;
+    }
+
+  context = xmp_parse_context_new (&xmp_parser,
+                                   XMP_FLAG_FIND_XPACKET,
+                                   (gpointer) filename,
+                                   NULL);
+
+  if (! xmp_parse_context_parse (context, contents, length, NULL))
+    {
+      xmp_parse_context_free (context);
+      return 1;
+    }
+
+  if (! xmp_parse_context_end_parse (context, NULL))
+    {
+      xmp_parse_context_free (context);
+      return 1;
+    }
+
+  xmp_parse_context_free (context);
+  return 0;
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  if (argc > 1)
+    {
+      for (argv++, argc--; argc; argv++, argc--)
+        if (scan_file (*argv) != 0)
+          return 1;
+      return 0;
+    }
+  else
+    {
+      fprintf (stderr, "Usage:\n"
+               "\txmpdump file [file [...]]\n\n"
+               "The file(s) given on the command line will be scanned "
+               "for XMP metadata\n");
+      return 1;
+    }
+}