Add an "--format=(json|text)" command-line option to both notmuch-search and notmuch-show.

In the case of notmuch-show, "--format=json" also implies
"--entire-thread" as the thread structure is implicit in the emitted
document tree.

As a coincidence to the implementation, multipart message ID numbers are
now incremented with each part printed. This changes the previous
semantics, which were unclear and not necessary related to the actual
ordering of the message parts.

1 files changed, 72 insertions, 0 deletions

diff --git a/json.c b/json.c
new file mode 100644
index 00000000..39607500
--- /dev/null
+++ b/json.c
@@ -0,0 +1,72 @@
+/* notmuch - Not much of an email program, (just index and search)
+ *
+ * Copyright © 2009 Scott Robinson
+ *
+ * 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/ .
+ *
+ * Authors: Scott Robinson <scott@quadhome.com>
+ *
+ */
+
+#include "notmuch-client.h"
+
+/*
+ * json_quote_str derived from cJSON's print_string_ptr,
+ * Copyright (c) 2009 Dave Gamble
+ */
+
+char *
+json_quote_str(const void *ctx, const char *str)
+{
+    const char *ptr;
+    char *ptr2;
+    char *out;
+    int len = 0;
+
+    if (!str)
+	return NULL;
+
+    for (ptr = str; *ptr; len++, ptr++) {
+	if (*ptr < 32 || *ptr == '\"' || *ptr == '\\')
+	    len++;
+    }
+
+    out = talloc_array (ctx, char, len + 3);
+
+    ptr = str;
+    ptr2 = out;
+
+    *ptr2++ = '\"';
+    while (*ptr) {
+	    if (*ptr > 31 && *ptr != '\"' && *ptr != '\\') {
+		*ptr2++ = *ptr++;
+	    } else {
+		*ptr2++ = '\\';
+		switch (*ptr++) {
+		    case '\"':	*ptr2++ = '\"';	break;
+		    case '\\':	*ptr2++ = '\\';	break;
+		    case '\b':	*ptr2++ = 'b';	break;
+		    case '\f':	*ptr2++ = 'f';	break;
+		    case '\n':	*ptr2++ = 'n';	break;
+		    case '\r':	*ptr2++ = 'r';	break;
+		    case '\t':	*ptr2++ = 't';	break;
+		    default:	 ptr2--;	break;
+		}
+	    }
+    }
+    *ptr2++ = '\"';
+    *ptr2++ = '\0';
+
+    return out;
+}