Initial commit of a test program to form the basis of notmuch.

Basically just playing with some simple code using libgmime to parse
an email message.

Makefile

@@ -0,0 +1,9 @@
+PROGS=g_mime_test
+
+all: $(PROGS)
+
+g_mime_test: g_mime_test.c
+	$(CC) g_mime_test.c `pkg-config --cflags --libs gmime-2.4` -o g_mime_test
+
+clean:
+	rm -f $(PROGS)

g_mime_test.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright © 2009 Carl Worth
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ * Author: Carl Worth <cworth@cworth.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <gmime/gmime.h>
+
+#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr[0]))
+
+static void
+print_header (const char *name, const char *value)
+{
+    printf ("%s:", name);
+    if (value)
+	printf ("\t%s", value);
+    printf ("\n");
+}
+
+int
+main (int argc, char **argv)
+{
+    GMimeStream *stream;
+    GMimeParser *parser;
+    GMimeMessage *message;
+
+    const char *filename;
+    FILE *file;
+
+    const char *sup_entry_headers[] = {
+	"From",
+	"Subject",
+	"Date",
+	"References",
+	"CC",
+	"To",
+	"In-Reply-To"
+    };
+    const char *value;
+    int i;
+
+    if (argc < 2) {
+	fprintf (stderr, "Usage: %s <mail-message>\n",
+		 argv[0]);
+	exit (1);
+    }
+
+    filename = argv[1];
+
+    file = fopen (filename, "r");
+    if (! file) {
+	fprintf (stderr, "Error opening %s: %s\n", filename, strerror (errno));
+	exit (1);
+    }
+    
+    g_mime_init (0);
+    
+    stream = g_mime_stream_file_new (file);
+
+    parser = g_mime_parser_new_with_stream (stream);
+
+    message = g_mime_parser_construct_message (parser);
+
+    value = g_mime_message_get_message_id (message);
+    print_header ("message_id", value);
+
+    for (i = 0; i < ARRAY_SIZE (sup_entry_headers); i++) {
+	value = g_mime_object_get_header (GMIME_OBJECT (message),
+					  sup_entry_headers[i]);
+	print_header (sup_entry_headers[i], value);
+    }
+
+    g_object_unref (message);
+    g_object_unref (parser);
+    g_object_unref (stream);
+    
+    return 0;
+}