Format JSON ourselves, without json-c.

To make the library thinner, we now format JSON ourselves: there was
so little we used from json-c, that doing it ourselves is lighter and
faster.

With this commit, we have the architecture in place, with only a few
little things remaining to be done, such as escaping string values.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/buffer.h b/lib/buffer.h
new file mode 100644
index 0000000..0d412e8
--- /dev/null
+++ b/lib/buffer.h
@@ -0,0 +1,48 @@
+/* buffer.h -- Auto-growing string buffers
+ *
+ * Copyright (c) 2012 BalaBit IT Security Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BALABIT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL BALABIT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef UMBERLOG_BUFFER_H
+#define UMBERLOG_BUFFER_H 1
+
+#include <stdlib.h>
+
+typedef struct
+{
+  size_t alloc;
+  size_t len;
+  char *msg;
+} ul_buffer_t;
+
+ul_buffer_t *ul_buffer_reset (ul_buffer_t *buffer)
+  __attribute__((visibility("hidden")));
+ul_buffer_t *ul_buffer_append (ul_buffer_t *buffer,
+                               const char *key, const char *value)
+  __attribute__((visibility("hidden")));
+char *ul_buffer_finalize (ul_buffer_t *buffer)
+  __attribute__((visibility("hidden")));
+
+#endif