Move ucl and rdns to contrib.

1 files changed, 2568 insertions, 0 deletions

diff --git a/contrib/libucl/ucl_util.c b/contrib/libucl/ucl_util.c
new file mode 100644
index 000000000..41e012bf1
--- /dev/null
+++ b/contrib/libucl/ucl_util.c
@@ -0,0 +1,2568 @@
+/* Copyright (c) 2013, Vsevolod Stakhov
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *       * Redistributions of source code must retain the above copyright
+ *         notice, this list of conditions and the following disclaimer.
+ *       * 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 ''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 AUTHOR 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.
+ */
+
+#include "ucl.h"
+#include "ucl_internal.h"
+#include "ucl_chartable.h"
+#include "kvec.h"
+
+#ifndef _WIN32
+#include <glob.h>
+#endif
+
+#ifdef HAVE_LIBGEN_H
+#include <libgen.h> /* For dirname */
+#endif
+
+typedef kvec_t(ucl_object_t *) ucl_array_t;
+
+#define UCL_ARRAY_GET(ar, obj) ucl_array_t *ar = \
+	(ucl_array_t *)((obj) != NULL ? (obj)->value.av : NULL)
+
+#ifdef HAVE_OPENSSL
+#include <openssl/err.h>
+#include <openssl/sha.h>
+#include <openssl/rsa.h>
+#include <openssl/ssl.h>
+#include <openssl/evp.h>
+#endif
+
+#ifdef CURL_FOUND
+#include <curl/curl.h>
+#endif
+#ifdef HAVE_FETCH_H
+#include <fetch.h>
+#endif
+
+#ifdef _WIN32
+#include <windows.h>
+
+#ifndef PROT_READ
+#define PROT_READ       1
+#endif
+#ifndef PROT_WRITE
+#define PROT_WRITE      2
+#endif
+#ifndef PROT_READWRITE
+#define PROT_READWRITE  3
+#endif
+#ifndef MAP_SHARED
+#define MAP_SHARED      1
+#endif
+#ifndef MAP_PRIVATE
+#define MAP_PRIVATE     2
+#endif
+#ifndef MAP_FAILED
+#define MAP_FAILED      ((void *) -1)
+#endif
+
+#ifdef _WIN32
+#include <limits.h>
+#define NBBY CHAR_BIT
+#endif
+
+static void *ucl_mmap(char *addr, size_t length, int prot, int access, int fd, off_t offset)
+{
+	void *map = NULL;
+	HANDLE handle = INVALID_HANDLE_VALUE;
+
+	switch (prot) {
+	default:
+	case PROT_READ:
+		{
+			handle = CreateFileMapping((HANDLE) _get_osfhandle(fd), 0, PAGE_READONLY, 0, length, 0);
+			if (!handle) break;
+			map = (void *) MapViewOfFile(handle, FILE_MAP_READ, 0, 0, length);
+			CloseHandle(handle);
+			break;
+		}
+	case PROT_WRITE:
+		{
+			handle = CreateFileMapping((HANDLE) _get_osfhandle(fd), 0, PAGE_READWRITE, 0, length, 0);
+			if (!handle) break;
+			map = (void *) MapViewOfFile(handle, FILE_MAP_WRITE, 0, 0, length);
+			CloseHandle(handle);
+			break;
+		}
+	case PROT_READWRITE:
+		{
+			handle = CreateFileMapping((HANDLE) _get_osfhandle(fd), 0, PAGE_READWRITE, 0, length, 0);
+			if (!handle) break;
+			map = (void *) MapViewOfFile(handle, FILE_MAP_ALL_ACCESS, 0, 0, length);
+			CloseHandle(handle);
+			break;
+		}
+	}
+	if (map == (void *) NULL) {
+		return (void *) MAP_FAILED;
+	}
+	return (void *) ((char *) map + offset);
+}
+
+static int ucl_munmap(void *map,size_t length)
+{
+	if (!UnmapViewOfFile(map)) {
+		return(-1);
+	}
+	return(0);
+}
+
+static char* ucl_realpath(const char *path, char *resolved_path) {
+    char *p;
+    char tmp[MAX_PATH + 1];
+    strncpy(tmp, path, sizeof(tmp)-1);
+    p = tmp;
+    while(*p) {
+        if (*p == '/') *p = '\\';
+        p++;
+    }
+    return _fullpath(resolved_path, tmp, MAX_PATH);
+}
+#else
+#define ucl_mmap mmap
+#define ucl_munmap munmap
+#define ucl_realpath realpath
+#endif
+
+typedef void (*ucl_object_dtor) (ucl_object_t *obj);
+static void ucl_object_free_internal (ucl_object_t *obj, bool allow_rec,
+		ucl_object_dtor dtor);
+static void ucl_object_dtor_unref (ucl_object_t *obj);
+
+static void
+ucl_object_dtor_free (ucl_object_t *obj)
+{
+	if (obj->trash_stack[UCL_TRASH_KEY] != NULL) {
+		UCL_FREE (obj->hh.keylen, obj->trash_stack[UCL_TRASH_KEY]);
+	}
+	if (obj->trash_stack[UCL_TRASH_VALUE] != NULL) {
+		UCL_FREE (obj->len, obj->trash_stack[UCL_TRASH_VALUE]);
+	}
+	/* Do not free ephemeral objects */
+	if ((obj->flags & UCL_OBJECT_EPHEMERAL) == 0) {
+		if (obj->type != UCL_USERDATA) {
+			UCL_FREE (sizeof (ucl_object_t), obj);
+		}
+		else {
+			struct ucl_object_userdata *ud = (struct ucl_object_userdata *)obj;
+			if (ud->dtor) {
+				ud->dtor (obj->value.ud);
+			}
+			UCL_FREE (sizeof (*ud), obj);
+		}
+	}
+}
+
+/*
+ * This is a helper function that performs exactly the same as
+ * `ucl_object_unref` but it doesn't iterate over elements allowing
+ * to use it for individual elements of arrays and multiple values
+ */
+static void
+ucl_object_dtor_unref_single (ucl_object_t *obj)
+{
+	if (obj != NULL) {
+#ifdef HAVE_ATOMIC_BUILTINS
+		unsigned int rc = __sync_sub_and_fetch (&obj->ref, 1);
+		if (rc == 0) {
+#else
+		if (--obj->ref == 0) {
+#endif
+			ucl_object_free_internal (obj, false, ucl_object_dtor_unref);
+		}
+	}
+}
+
+static void
+ucl_object_dtor_unref (ucl_object_t *obj)
+{
+	if (obj->ref == 0) {
+		ucl_object_dtor_free (obj);
+	}
+	else {
+		/* This may cause dtor unref being called one more time */
+		ucl_object_dtor_unref_single (obj);
+	}
+}
+
+static void
+ucl_object_free_internal (ucl_object_t *obj, bool allow_rec, ucl_object_dtor dtor)
+{
+	ucl_object_t *tmp, *sub;
+
+	while (obj != NULL) {
+		if (obj->type == UCL_ARRAY) {
+			UCL_ARRAY_GET (vec, obj);
+			unsigned int i;
+
+			if (vec != NULL) {
+				for (i = 0; i < vec->n; i ++) {
+					sub = kv_A (*vec, i);
+					if (sub != NULL) {
+						tmp = sub;
+						while (sub) {
+							tmp = sub->next;
+							dtor (sub);
+							sub = tmp;
+						}
+					}
+				}
+				kv_destroy (*vec);
+				UCL_FREE (sizeof (*vec), vec);
+			}
+		}
+		else if (obj->type == UCL_OBJECT) {
+			if (obj->value.ov != NULL) {
+				ucl_hash_destroy (obj->value.ov, (ucl_hash_free_func *)dtor);
+			}
+		}
+		tmp = obj->next;
+		dtor (obj);
+		obj = tmp;
+
+		if (!allow_rec) {
+			break;
+		}
+	}
+}
+
+void
+ucl_object_free (ucl_object_t *obj)
+{
+	ucl_object_free_internal (obj, true, ucl_object_dtor_free);
+}
+
+size_t
+ucl_unescape_json_string (char *str, size_t len)
+{
+	char *t = str, *h = str;
+	int i, uval;
+
+	if (len <= 1) {
+		return len;
+	}
+	/* t is target (tortoise), h is source (hare) */
+
+	while (len) {
+		if (*h == '\\') {
+			h ++;
+			switch (*h) {
+			case 'n':
+				*t++ = '\n';
+				break;
+			case 'r':
+				*t++ = '\r';
+				break;
+			case 'b':
+				*t++ = '\b';
+				break;
+			case 't':
+				*t++ = '\t';
+				break;
+			case 'f':
+				*t++ = '\f';
+				break;
+			case '\\':
+				*t++ = '\\';
+				break;
+			case '"':
+				*t++ = '"';
+				break;
+			case 'u':
+				/* Unicode escape */
+				uval = 0;
+				if (len > 3) {
+					for (i = 0; i < 4; i++) {
+						uval <<= 4;
+						if (isdigit (h[i])) {
+							uval += h[i] - '0';
+						}
+						else if (h[i] >= 'a' && h[i] <= 'f') {
+							uval += h[i] - 'a' + 10;
+						}
+						else if (h[i] >= 'A' && h[i] <= 'F') {
+							uval += h[i] - 'A' + 10;
+						}
+						else {
+							break;
+						}
+					}
+					h += 3;
+					len -= 3;
+					/* Encode */
+					if(uval < 0x80) {
+						t[0] = (char)uval;
+						t ++;
+					}
+					else if(uval < 0x800) {
+						t[0] = 0xC0 + ((uval & 0x7C0) >> 6);
+						t[1] = 0x80 + ((uval & 0x03F));
+						t += 2;
+					}
+					else if(uval < 0x10000) {
+						t[0] = 0xE0 + ((uval & 0xF000) >> 12);
+						t[1] = 0x80 + ((uval & 0x0FC0) >> 6);
+						t[2] = 0x80 + ((uval & 0x003F));
+						t += 3;
+					}
+					else if(uval <= 0x10FFFF) {
+						t[0] = 0xF0 + ((uval & 0x1C0000) >> 18);
+						t[1] = 0x80 + ((uval & 0x03F000) >> 12);
+						t[2] = 0x80 + ((uval & 0x000FC0) >> 6);
+						t[3] = 0x80 + ((uval & 0x00003F));
+						t += 4;
+					}
+					else {
+						*t++ = '?';
+					}
+				}
+				else {
+					*t++ = 'u';
+				}
+				break;
+			default:
+				*t++ = *h;
+				break;
+			}
+			h ++;
+			len --;
+		}
+		else {
+			*t++ = *h++;
+		}
+		len --;
+	}
+	*t = '\0';
+
+	return (t - str);
+}
+
+char *
+ucl_copy_key_trash (const ucl_object_t *obj)
+{
+	ucl_object_t *deconst;
+
+	if (obj == NULL) {
+		return NULL;
+	}
+	if (obj->trash_stack[UCL_TRASH_KEY] == NULL && obj->key != NULL) {
+		deconst = __DECONST (ucl_object_t *, obj);
+		deconst->trash_stack[UCL_TRASH_KEY] = malloc (obj->keylen + 1);
+		if (deconst->trash_stack[UCL_TRASH_KEY] != NULL) {
+			memcpy (deconst->trash_stack[UCL_TRASH_KEY], obj->key, obj->keylen);
+			deconst->trash_stack[UCL_TRASH_KEY][obj->keylen] = '\0';
+		}
+		deconst->key = obj->trash_stack[UCL_TRASH_KEY];
+		deconst->flags |= UCL_OBJECT_ALLOCATED_KEY;
+	}
+
+	return obj->trash_stack[UCL_TRASH_KEY];
+}
+
+char *
+ucl_copy_value_trash (const ucl_object_t *obj)
+{
+	ucl_object_t *deconst;
+
+	if (obj == NULL) {
+		return NULL;
+	}
+	if (obj->trash_stack[UCL_TRASH_VALUE] == NULL) {
+		deconst = __DECONST (ucl_object_t *, obj);
+		if (obj->type == UCL_STRING) {
+
+			/* Special case for strings */
+			deconst->trash_stack[UCL_TRASH_VALUE] = malloc (obj->len + 1);
+			if (deconst->trash_stack[UCL_TRASH_VALUE] != NULL) {
+				memcpy (deconst->trash_stack[UCL_TRASH_VALUE], obj->value.sv, obj->len);
+				deconst->trash_stack[UCL_TRASH_VALUE][obj->len] = '\0';
+				deconst->value.sv = obj->trash_stack[UCL_TRASH_VALUE];
+			}
+		}
+		else {
+			/* Just emit value in json notation */
+			deconst->trash_stack[UCL_TRASH_VALUE] = ucl_object_emit_single_json (obj);
+			deconst->len = strlen (obj->trash_stack[UCL_TRASH_VALUE]);
+		}
+		deconst->flags |= UCL_OBJECT_ALLOCATED_VALUE;
+	}
+	return obj->trash_stack[UCL_TRASH_VALUE];
+}
+
+UCL_EXTERN ucl_object_t*
+ucl_parser_get_object (struct ucl_parser *parser)
+{
+	if (parser->state != UCL_STATE_ERROR && parser->top_obj != NULL) {
+		return ucl_object_ref (parser->top_obj);
+	}
+
+	return NULL;
+}
+
+UCL_EXTERN void
+ucl_parser_free (struct ucl_parser *parser)
+{
+	struct ucl_stack *stack, *stmp;
+	struct ucl_macro *macro, *mtmp;
+	struct ucl_chunk *chunk, *ctmp;
+	struct ucl_pubkey *key, *ktmp;
+	struct ucl_variable *var, *vtmp;
+
+	if (parser == NULL) {
+		return;
+	}
+
+	if (parser->top_obj != NULL) {
+		ucl_object_unref (parser->top_obj);
+	}
+
+	LL_FOREACH_SAFE (parser->stack, stack, stmp) {
+		free (stack);
+	}
+	HASH_ITER (hh, parser->macroes, macro, mtmp) {
+		free (macro->name);
+		HASH_DEL (parser->macroes, macro);
+		UCL_FREE (sizeof (struct ucl_macro), macro);
+	}
+	LL_FOREACH_SAFE (parser->chunks, chunk, ctmp) {
+		UCL_FREE (sizeof (struct ucl_chunk), chunk);
+	}
+	LL_FOREACH_SAFE (parser->keys, key, ktmp) {
+		UCL_FREE (sizeof (struct ucl_pubkey), key);
+	}
+	LL_FOREACH_SAFE (parser->variables, var, vtmp) {
+		free (var->value);
+		free (var->var);
+		UCL_FREE (sizeof (struct ucl_variable), var);
+	}
+
+	if (parser->err != NULL) {
+		utstring_free (parser->err);
+	}
+
+	if (parser->cur_file) {
+		free (parser->cur_file);
+	}
+
+	UCL_FREE (sizeof (struct ucl_parser), parser);
+}
+
+UCL_EXTERN const char *
+ucl_parser_get_error(struct ucl_parser *parser)
+{
+	if (parser == NULL) {
+		return NULL;
+	}
+
+	if (parser->err == NULL)
+		return NULL;
+
+	return utstring_body(parser->err);
+}
+
+UCL_EXTERN void
+ucl_parser_clear_error(struct ucl_parser *parser)
+{
+	if (parser != NULL && parser->err != NULL) {
+		utstring_free(parser->err);
+		parser->err = NULL;
+	}
+}
+
+UCL_EXTERN bool
+ucl_pubkey_add (struct ucl_parser *parser, const unsigned char *key, size_t len)
+{
+#ifndef HAVE_OPENSSL
+	ucl_create_err (&parser->err, "cannot check signatures without openssl");
+	return false;
+#else
+# if (OPENSSL_VERSION_NUMBER < 0x10000000L)
+	ucl_create_err (&parser->err, "cannot check signatures, openssl version is unsupported");
+	return EXIT_FAILURE;
+# else
+	struct ucl_pubkey *nkey;
+	BIO *mem;
+
+	mem = BIO_new_mem_buf ((void *)key, len);
+	nkey = UCL_ALLOC (sizeof (struct ucl_pubkey));
+	if (nkey == NULL) {
+		ucl_create_err (&parser->err, "cannot allocate memory for key");
+		return false;
+	}
+	nkey->key = PEM_read_bio_PUBKEY (mem, &nkey->key, NULL, NULL);
+	BIO_free (mem);
+	if (nkey->key == NULL) {
+		UCL_FREE (sizeof (struct ucl_pubkey), nkey);
+		ucl_create_err (&parser->err, "%s",
+				ERR_error_string (ERR_get_error (), NULL));
+		return false;
+	}
+	LL_PREPEND (parser->keys, nkey);
+# endif
+#endif
+	return true;
+}
+
+#ifdef CURL_FOUND
+struct ucl_curl_cbdata {
+	unsigned char *buf;
+	size_t buflen;
+};
+
+static size_t
+ucl_curl_write_callback (void* contents, size_t size, size_t nmemb, void* ud)
+{
+	struct ucl_curl_cbdata *cbdata = ud;
+	size_t realsize = size * nmemb;
+
+	cbdata->buf = realloc (cbdata->buf, cbdata->buflen + realsize + 1);
+	if (cbdata->buf == NULL) {
+		return 0;
+	}
+
+	memcpy (&(cbdata->buf[cbdata->buflen]), contents, realsize);
+	cbdata->buflen += realsize;
+	cbdata->buf[cbdata->buflen] = 0;
+
+	return realsize;
+}
+#endif
+
+/**
+ * Fetch a url and save results to the memory buffer
+ * @param url url to fetch
+ * @param len length of url
+ * @param buf target buffer
+ * @param buflen target length
+ * @return
+ */
+static bool
+ucl_fetch_url (const unsigned char *url, unsigned char **buf, size_t *buflen,
+		UT_string **err, bool must_exist)
+{
+
+#ifdef HAVE_FETCH_H
+	struct url *fetch_url;
+	struct url_stat us;
+	FILE *in;
+
+	fetch_url = fetchParseURL (url);
+	if (fetch_url == NULL) {
+		ucl_create_err (err, "invalid URL %s: %s",
+				url, strerror (errno));
+		return false;
+	}
+	if ((in = fetchXGet (fetch_url, &us, "")) == NULL) {
+		if (!must_exist) {
+			ucl_create_err (err, "cannot fetch URL %s: %s",
+				url, strerror (errno));
+		}
+		fetchFreeURL (fetch_url);
+		return false;
+	}
+
+	*buflen = us.size;
+	*buf = malloc (*buflen);
+	if (*buf == NULL) {
+		ucl_create_err (err, "cannot allocate buffer for URL %s: %s",
+				url, strerror (errno));
+		fclose (in);
+		fetchFreeURL (fetch_url);
+		return false;
+	}
+
+	if (fread (*buf, *buflen, 1, in) != 1) {
+		ucl_create_err (err, "cannot read URL %s: %s",
+				url, strerror (errno));
+		fclose (in);
+		fetchFreeURL (fetch_url);
+		return false;
+	}
+
+	fetchFreeURL (fetch_url);
+	return true;
+#elif defined(CURL_FOUND)
+	CURL *curl;
+	int r;
+	struct ucl_curl_cbdata cbdata;
+
+	curl = curl_easy_init ();
+	if (curl == NULL) {
+		ucl_create_err (err, "CURL interface is broken");
+		return false;
+	}
+	if ((r = curl_easy_setopt (curl, CURLOPT_URL, url)) != CURLE_OK) {
+		ucl_create_err (err, "invalid URL %s: %s",
+				url, curl_easy_strerror (r));
+		curl_easy_cleanup (curl);
+		return false;
+	}
+	curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ucl_curl_write_callback);
+	cbdata.buf = *buf;
+	cbdata.buflen = *buflen;
+	curl_easy_setopt (curl, CURLOPT_WRITEDATA, &cbdata);
+
+	if ((r = curl_easy_perform (curl)) != CURLE_OK) {
+		if (!must_exist) {
+			ucl_create_err (err, "error fetching URL %s: %s",
+				url, curl_easy_strerror (r));
+		}
+		curl_easy_cleanup (curl);
+		if (cbdata.buf) {
+			free (cbdata.buf);
+		}
+		return false;
+	}
+	*buf = cbdata.buf;
+	*buflen = cbdata.buflen;
+
+	return true;
+#else
+	ucl_create_err (err, "URL support is disabled");
+	return false;
+#endif
+}
+
+/**
+ * Fetch a file and save results to the memory buffer
+ * @param filename filename to fetch
+ * @param len length of filename
+ * @param buf target buffer
+ * @param buflen target length
+ * @return
+ */
+static bool
+ucl_fetch_file (const unsigned char *filename, unsigned char **buf, size_t *buflen,
+		UT_string **err, bool must_exist)
+{
+	int fd;
+	struct stat st;
+
+	if (stat (filename, &st) == -1 || !S_ISREG (st.st_mode)) {
+		if (must_exist) {
+			ucl_create_err (err, "cannot stat file %s: %s",
+					filename, strerror (errno));
+		}
+		return false;
+	}
+	if (st.st_size == 0) {
+		/* Do not map empty files */
+		*buf = "";
+		*buflen = 0;
+	}
+	else {
+		if ((fd = open (filename, O_RDONLY)) == -1) {
+			ucl_create_err (err, "cannot open file %s: %s",
+					filename, strerror (errno));
+			return false;
+		}
+		if ((*buf = ucl_mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
+			close (fd);
+			ucl_create_err (err, "cannot mmap file %s: %s",
+					filename, strerror (errno));
+			return false;
+		}
+		*buflen = st.st_size;
+		close (fd);
+	}
+
+	return true;
+}
+
+
+#if (defined(HAVE_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10000000L)
+static inline bool
+ucl_sig_check (const unsigned char *data, size_t datalen,
+		const unsigned char *sig, size_t siglen, struct ucl_parser *parser)
+{
+	struct ucl_pubkey *key;
+	char dig[EVP_MAX_MD_SIZE];
+	unsigned int diglen;
+	EVP_PKEY_CTX *key_ctx;
+	EVP_MD_CTX *sign_ctx = NULL;
+
+	sign_ctx = EVP_MD_CTX_create ();
+
+	LL_FOREACH (parser->keys, key) {
+		key_ctx = EVP_PKEY_CTX_new (key->key, NULL);
+		if (key_ctx != NULL) {
+			if (EVP_PKEY_verify_init (key_ctx) <= 0) {
+				EVP_PKEY_CTX_free (key_ctx);
+				continue;
+			}
+			if (EVP_PKEY_CTX_set_rsa_padding (key_ctx, RSA_PKCS1_PADDING) <= 0) {
+				EVP_PKEY_CTX_free (key_ctx);
+				continue;
+			}
+			if (EVP_PKEY_CTX_set_signature_md (key_ctx, EVP_sha256 ()) <= 0) {
+				EVP_PKEY_CTX_free (key_ctx);
+				continue;
+			}
+			EVP_DigestInit (sign_ctx, EVP_sha256 ());
+			EVP_DigestUpdate (sign_ctx, data, datalen);
+			EVP_DigestFinal (sign_ctx, dig, &diglen);
+
+			if (EVP_PKEY_verify (key_ctx, sig, siglen, dig, diglen) == 1) {
+				EVP_MD_CTX_destroy (sign_ctx);
+				EVP_PKEY_CTX_free (key_ctx);
+				return true;
+			}
+
+			EVP_PKEY_CTX_free (key_ctx);
+		}
+	}
+
+	EVP_MD_CTX_destroy (sign_ctx);
+
+	return false;
+}
+#endif
+
+/**
+ * Include an url to configuration
+ * @param data
+ * @param len
+ * @param parser
+ * @param err
+ * @return
+ */
+static bool
+ucl_include_url (const unsigned char *data, size_t len,
+		struct ucl_parser *parser, bool check_signature, bool must_exist,
+		unsigned priority)
+{
+
+	bool res;
+	unsigned char *buf = NULL;
+	size_t buflen = 0;
+	struct ucl_chunk *chunk;
+	char urlbuf[PATH_MAX];
+	int prev_state;
+
+	snprintf (urlbuf, sizeof (urlbuf), "%.*s", (int)len, data);
+
+	if (!ucl_fetch_url (urlbuf, &buf, &buflen, &parser->err, must_exist)) {
+		return (!must_exist || false);
+	}
+
+	if (check_signature) {
+#if (defined(HAVE_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10000000L)
+		unsigned char *sigbuf = NULL;
+		size_t siglen = 0;
+		/* We need to check signature first */
+		snprintf (urlbuf, sizeof (urlbuf), "%.*s.sig", (int)len, data);
+		if (!ucl_fetch_url (urlbuf, &sigbuf, &siglen, &parser->err, true)) {
+			return false;
+		}
+		if (!ucl_sig_check (buf, buflen, sigbuf, siglen, parser)) {
+			ucl_create_err (&parser->err, "cannot verify url %s: %s",
+							urlbuf,
+							ERR_error_string (ERR_get_error (), NULL));
+			if (siglen > 0) {
+				ucl_munmap (sigbuf, siglen);
+			}
+			return false;
+		}
+		if (siglen > 0) {
+			ucl_munmap (sigbuf, siglen);
+		}
+#endif
+	}
+
+	prev_state = parser->state;
+	parser->state = UCL_STATE_INIT;
+
+	res = ucl_parser_add_chunk_priority (parser, buf, buflen, priority);
+	if (res == true) {
+		/* Remove chunk from the stack */
+		chunk = parser->chunks;
+		if (chunk != NULL) {
+			parser->chunks = chunk->next;
+			UCL_FREE (sizeof (struct ucl_chunk), chunk);
+		}
+	}
+
+	parser->state = prev_state;
+	free (buf);
+
+	return res;
+}
+
+/**
+ * Include a single file to the parser
+ * @param data
+ * @param len
+ * @param parser
+ * @param check_signature
+ * @param must_exist
+ * @param allow_glob
+ * @param priority
+ * @return
+ */
+static bool
+ucl_include_file_single (const unsigned char *data, size_t len,
+		struct ucl_parser *parser, bool check_signature, bool must_exist,
+		unsigned priority)
+{
+	bool res;
+	struct ucl_chunk *chunk;
+	unsigned char *buf = NULL;
+	char *old_curfile;
+	size_t buflen;
+	char filebuf[PATH_MAX], realbuf[PATH_MAX];
+	int prev_state;
+	struct ucl_variable *cur_var, *tmp_var, *old_curdir = NULL,
+			*old_filename = NULL;
+
+	snprintf (filebuf, sizeof (filebuf), "%.*s", (int)len, data);
+	if (ucl_realpath (filebuf, realbuf) == NULL) {
+		if (!must_exist) {
+			return true;
+		}
+		ucl_create_err (&parser->err, "cannot open file %s: %s",
+									filebuf,
+									strerror (errno));
+		return false;
+	}
+
+	if (parser->cur_file && strcmp (realbuf, parser->cur_file) == 0) {
+		/* We are likely including the file itself */
+		ucl_create_err (&parser->err, "trying to include the file %s from itself",
+				realbuf);
+		return false;
+	}
+
+	if (!ucl_fetch_file (realbuf, &buf, &buflen, &parser->err, must_exist)) {
+		return (!must_exist || false);
+	}
+
+	if (check_signature) {
+#if (defined(HAVE_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10000000L)
+		unsigned char *sigbuf = NULL;
+		size_t siglen = 0;
+		/* We need to check signature first */
+		snprintf (filebuf, sizeof (filebuf), "%s.sig", realbuf);
+		if (!ucl_fetch_file (filebuf, &sigbuf, &siglen, &parser->err, true)) {
+			return false;
+		}
+		if (!ucl_sig_check (buf, buflen, sigbuf, siglen, parser)) {
+			ucl_create_err (&parser->err, "cannot verify file %s: %s",
+							filebuf,
+							ERR_error_string (ERR_get_error (), NULL));
+			if (siglen > 0) {
+				ucl_munmap (sigbuf, siglen);
+			}
+			return false;
+		}
+		if (siglen > 0) {
+			ucl_munmap (sigbuf, siglen);
+		}
+#endif
+	}
+
+	old_curfile = parser->cur_file;
+	parser->cur_file = strdup (realbuf);
+
+	/* Store old file vars */
+	DL_FOREACH_SAFE (parser->variables, cur_var, tmp_var) {
+		if (strcmp (cur_var->var, "CURDIR") == 0) {
+			old_curdir = cur_var;
+			DL_DELETE (parser->variables, cur_var);
+		}
+		else if (strcmp (cur_var->var, "FILENAME") == 0) {
+			old_filename = cur_var;
+			DL_DELETE (parser->variables, cur_var);
+		}
+	}
+
+	ucl_parser_set_filevars (parser, realbuf, false);
+
+	prev_state = parser->state;
+	parser->state = UCL_STATE_INIT;
+
+	res = ucl_parser_add_chunk_priority (parser, buf, buflen, priority);
+	if (!res && !must_exist) {
+		/* Free error */
+		utstring_free (parser->err);
+		parser->err = NULL;
+		parser->state = UCL_STATE_AFTER_VALUE;
+	}
+
+	/* Remove chunk from the stack */
+	chunk = parser->chunks;
+	if (chunk != NULL) {
+		parser->chunks = chunk->next;
+		UCL_FREE (sizeof (struct ucl_chunk), chunk);
+		parser->recursion --;
+	}
+
+	/* Restore old file vars */
+	parser->cur_file = old_curfile;
+	DL_FOREACH_SAFE (parser->variables, cur_var, tmp_var) {
+		if (strcmp (cur_var->var, "CURDIR") == 0 && old_curdir) {
+			DL_DELETE (parser->variables, cur_var);
+			free (cur_var->var);
+			free (cur_var->value);
+			UCL_FREE (sizeof (struct ucl_variable), cur_var);
+		}
+		else if (strcmp (cur_var->var, "FILENAME") == 0 && old_filename) {
+			DL_DELETE (parser->variables, cur_var);
+			free (cur_var->var);
+			free (cur_var->value);
+			UCL_FREE (sizeof (struct ucl_variable), cur_var);
+		}
+	}
+	if (old_filename) {
+		DL_APPEND (parser->variables, old_filename);
+	}
+	if (old_curdir) {
+		DL_APPEND (parser->variables, old_curdir);
+	}
+	if (old_curfile) {
+		free (old_curfile);
+	}
+
+	parser->state = prev_state;
+
+	if (buflen > 0) {
+		ucl_munmap (buf, buflen);
+	}
+
+	return res;
+}
+
+/**
+ * Include a file to configuration
+ * @param data
+ * @param len
+ * @param parser
+ * @param err
+ * @return
+ */
+static bool
+ucl_include_file (const unsigned char *data, size_t len,
+		struct ucl_parser *parser, bool check_signature, bool must_exist,
+		bool allow_glob, unsigned priority)
+{
+	const unsigned char *p = data, *end = data + len;
+	bool need_glob = false;
+	int cnt = 0;
+	char glob_pattern[PATH_MAX];
+	size_t i;
+
+#ifndef _WIN32
+	if (!allow_glob) {
+		return ucl_include_file_single (data, len, parser, check_signature,
+			must_exist, priority);
+	}
+	else {
+		/* Check for special symbols in a filename */
+		while (p != end) {
+			if (*p == '*' || *p == '?') {
+				need_glob = true;
+				break;
+			}
+			p ++;
+		}
+		if (need_glob) {
+			glob_t globbuf;
+			memset (&globbuf, 0, sizeof (globbuf));
+			ucl_strlcpy (glob_pattern, (const char *)data, sizeof (glob_pattern));
+			if (glob (glob_pattern, 0, NULL, &globbuf) != 0) {
+				return (!must_exist || false);
+			}
+			for (i = 0; i < globbuf.gl_pathc; i ++) {
+				if (!ucl_include_file_single ((unsigned char *)globbuf.gl_pathv[i],
+						strlen (globbuf.gl_pathv[i]), parser, check_signature,
+						must_exist, priority)) {
+					globfree (&globbuf);
+					return false;
+				}
+				cnt ++;
+			}
+			globfree (&globbuf);
+
+			if (cnt == 0 && must_exist) {
+				ucl_create_err (&parser->err, "cannot match any files for pattern %s",
+					glob_pattern);
+				return false;
+			}
+		}
+		else {
+			return ucl_include_file_single (data, len, parser, check_signature,
+				must_exist, priority);
+		}
+	}
+#else
+	/* Win32 compilers do not support globbing. Therefore, for Win32,
+	   treat allow_glob/need_glob as a NOOP and just return */
+	return ucl_include_file_single (data, len, parser, check_signature,
+		must_exist, priority);
+#endif
+	
+	return true;
+}
+
+/**
+ * Common function to handle .*include* macros
+ * @param data
+ * @param len
+ * @param args
+ * @param parser
+ * @param default_try
+ * @param default_sign
+ * @return
+ */
+static bool
+ucl_include_common (const unsigned char *data, size_t len,
+		const ucl_object_t *args, struct ucl_parser *parser,
+		bool default_try,
+		bool default_sign)
+{
+	bool try_load, allow_glob, allow_url, need_sign;
+	unsigned priority;
+	const ucl_object_t *param;
+	ucl_object_iter_t it = NULL;
+
+	/* Default values */
+	try_load = default_try;
+	allow_glob = false;
+	allow_url = true;
+	need_sign = default_sign;
+	priority = 0;
+
+	/* Process arguments */
+	if (args != NULL && args->type == UCL_OBJECT) {
+		while ((param = ucl_iterate_object (args, &it, true)) != NULL) {
+			if (param->type == UCL_BOOLEAN) {
+				if (strcmp (param->key, "try") == 0) {
+					try_load = ucl_object_toboolean (param);
+				}
+				else if (strcmp (param->key, "sign") == 0) {
+					need_sign = ucl_object_toboolean (param);
+				}
+				else if (strcmp (param->key, "glob") == 0) {
+					allow_glob =  ucl_object_toboolean (param);
+				}
+				else if (strcmp (param->key, "url") == 0) {
+					allow_url =  ucl_object_toboolean (param);
+				}
+			}
+			else if (param->type == UCL_INT) {
+				if (strcmp (param->key, "priority") == 0) {
+					priority = ucl_object_toint (param);
+				}
+			}
+		}
+	}
+
+	if (*data == '/' || *data == '.') {
+		/* Try to load a file */
+		return ucl_include_file (data, len, parser, need_sign, !try_load,
+				allow_glob, priority);
+	}
+	else if (allow_url) {
+		/* Globbing is not used for URL's */
+		return ucl_include_url (data, len, parser, need_sign, !try_load,
+				priority);
+	}
+
+	return false;
+}
+
+/**
+ * Handle include macro
+ * @param data include data
+ * @param len length of data
+ * @param ud user data
+ * @param err error ptr
+ * @return
+ */
+UCL_EXTERN bool
+ucl_include_handler (const unsigned char *data, size_t len,
+		const ucl_object_t *args, void* ud)
+{
+	struct ucl_parser *parser = ud;
+
+	return ucl_include_common (data, len, args, parser, false, false);
+}
+
+/**
+ * Handle includes macro
+ * @param data include data
+ * @param len length of data
+ * @param ud user data
+ * @param err error ptr
+ * @return
+ */
+UCL_EXTERN bool
+ucl_includes_handler (const unsigned char *data, size_t len,
+		const ucl_object_t *args, void* ud)
+{
+	struct ucl_parser *parser = ud;
+
+	return ucl_include_common (data, len, args, parser, false, true);
+}
+
+
+UCL_EXTERN bool
+ucl_try_include_handler (const unsigned char *data, size_t len,
+		const ucl_object_t *args, void* ud)
+{
+	struct ucl_parser *parser = ud;
+
+	return ucl_include_common (data, len, args, parser, true, false);
+}
+
+UCL_EXTERN bool
+ucl_parser_set_filevars (struct ucl_parser *parser, const char *filename, bool need_expand)
+{
+	char realbuf[PATH_MAX], *curdir;
+
+	if (filename != NULL) {
+		if (need_expand) {
+			if (ucl_realpath (filename, realbuf) == NULL) {
+				return false;
+			}
+		}
+		else {
+			ucl_strlcpy (realbuf, filename, sizeof (realbuf));
+		}
+
+		/* Define variables */
+		ucl_parser_register_variable (parser, "FILENAME", realbuf);
+		curdir = dirname (realbuf);
+		ucl_parser_register_variable (parser, "CURDIR", curdir);
+	}
+	else {
+		/* Set everything from the current dir */
+		curdir = getcwd (realbuf, sizeof (realbuf));
+		ucl_parser_register_variable (parser, "FILENAME", "undef");
+		ucl_parser_register_variable (parser, "CURDIR", curdir);
+	}
+
+	return true;
+}
+
+UCL_EXTERN bool
+ucl_parser_add_file (struct ucl_parser *parser, const char *filename)
+{
+	unsigned char *buf;
+	size_t len;
+	bool ret;
+	char realbuf[PATH_MAX];
+
+	if (ucl_realpath (filename, realbuf) == NULL) {
+		ucl_create_err (&parser->err, "cannot open file %s: %s",
+				filename,
+				strerror (errno));
+		return false;
+	}
+
+	if (!ucl_fetch_file (realbuf, &buf, &len, &parser->err, true)) {
+		return false;
+	}
+
+	if (parser->cur_file) {
+		free (parser->cur_file);
+	}
+	parser->cur_file = strdup (realbuf);
+	ucl_parser_set_filevars (parser, realbuf, false);
+	ret = ucl_parser_add_chunk (parser, buf, len);
+
+	if (len > 0) {
+		ucl_munmap (buf, len);
+	}
+
+	return ret;
+}
+
+UCL_EXTERN bool
+ucl_parser_add_fd (struct ucl_parser *parser, int fd)
+{
+	unsigned char *buf;
+	size_t len;
+	bool ret;
+	struct stat st;
+
+	if (fstat (fd, &st) == -1) {
+		ucl_create_err (&parser->err, "cannot stat fd %d: %s",
+			fd, strerror (errno));
+		return false;
+	}
+	if ((buf = ucl_mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
+		ucl_create_err (&parser->err, "cannot mmap fd %d: %s",
+			fd, strerror (errno));
+		return false;
+	}
+
+	if (parser->cur_file) {
+		free (parser->cur_file);
+	}
+	parser->cur_file = NULL;
+	len = st.st_size;
+	ret = ucl_parser_add_chunk (parser, buf, len);
+
+	if (len > 0) {
+		ucl_munmap (buf, len);
+	}
+
+	return ret;
+}
+
+size_t
+ucl_strlcpy (char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0) {
+		while (--n != 0) {
+			if ((*d++ = *s++) == '\0') {
+				break;
+			}
+		}
+	}
+
+	if (n == 0 && siz != 0) {
+		*d = '\0';
+	}
+
+	return (s - src - 1);    /* count does not include NUL */
+}
+
+size_t
+ucl_strlcpy_unsafe (char *dst, const char *src, size_t siz)
+{
+	memcpy (dst, src, siz - 1);
+	dst[siz - 1] = '\0';
+
+	return siz - 1;
+}
+
+size_t
+ucl_strlcpy_tolower (char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0) {
+		while (--n != 0) {
+			if ((*d++ = tolower (*s++)) == '\0') {
+				break;
+			}
+		}
+	}
+
+	if (n == 0 && siz != 0) {
+		*d = '\0';
+	}
+
+	return (s - src);    /* count does not include NUL */
+}
+
+ucl_object_t *
+ucl_object_fromstring_common (const char *str, size_t len, enum ucl_string_flags flags)
+{
+	ucl_object_t *obj;
+	const char *start, *end, *p, *pos;
+	char *dst, *d;
+	size_t escaped_len;
+
+	if (str == NULL) {
+		return NULL;
+	}
+
+	obj = ucl_object_new ();
+	if (obj) {
+		if (len == 0) {
+			len = strlen (str);
+		}
+		if (flags & UCL_STRING_TRIM) {
+			/* Skip leading spaces */
+			for (start = str; (size_t)(start - str) < len; start ++) {
+				if (!ucl_test_character (*start, UCL_CHARACTER_WHITESPACE_UNSAFE)) {
+					break;
+				}
+			}
+			/* Skip trailing spaces */
+			for (end = str + len - 1; end > start; end --) {
+				if (!ucl_test_character (*end, UCL_CHARACTER_WHITESPACE_UNSAFE)) {
+					break;
+				}
+			}
+			end ++;
+		}
+		else {
+			start = str;
+			end = str + len;
+		}
+
+		obj->type = UCL_STRING;
+		if (flags & UCL_STRING_ESCAPE) {
+			for (p = start, escaped_len = 0; p < end; p ++, escaped_len ++) {
+				if (ucl_test_character (*p, UCL_CHARACTER_JSON_UNSAFE)) {
+					escaped_len ++;
+				}
+			}
+			dst = malloc (escaped_len + 1);
+			if (dst != NULL) {
+				for (p = start, d = dst; p < end; p ++, d ++) {
+					if (ucl_test_character (*p, UCL_CHARACTER_JSON_UNSAFE)) {
+						switch (*p) {
+						case '\n':
+							*d++ = '\\';
+							*d = 'n';
+							break;
+						case '\r':
+							*d++ = '\\';
+							*d = 'r';
+							break;
+						case '\b':
+							*d++ = '\\';
+							*d = 'b';
+							break;
+						case '\t':
+							*d++ = '\\';
+							*d = 't';
+							break;
+						case '\f':
+							*d++ = '\\';
+							*d = 'f';
+							break;
+						case '\\':
+							*d++ = '\\';
+							*d = '\\';
+							break;
+						case '"':
+							*d++ = '\\';
+							*d = '"';
+							break;
+						}
+					}
+					else {
+						*d = *p;
+					}
+				}
+				*d = '\0';
+				obj->value.sv = dst;
+				obj->trash_stack[UCL_TRASH_VALUE] = dst;
+				obj->len = escaped_len;
+			}
+		}
+		else {
+			dst = malloc (end - start + 1);
+			if (dst != NULL) {
+				ucl_strlcpy_unsafe (dst, start, end - start + 1);
+				obj->value.sv = dst;
+				obj->trash_stack[UCL_TRASH_VALUE] = dst;
+				obj->len = end - start;
+			}
+		}
+		if ((flags & UCL_STRING_PARSE) && dst != NULL) {
+			/* Parse what we have */
+			if (flags & UCL_STRING_PARSE_BOOLEAN) {
+				if (!ucl_maybe_parse_boolean (obj, dst, obj->len) && (flags & UCL_STRING_PARSE_NUMBER)) {
+					ucl_maybe_parse_number (obj, dst, dst + obj->len, &pos,
+							flags & UCL_STRING_PARSE_DOUBLE,
+							flags & UCL_STRING_PARSE_BYTES,
+							flags & UCL_STRING_PARSE_TIME);
+				}
+			}
+			else {
+				ucl_maybe_parse_number (obj, dst, dst + obj->len, &pos,
+						flags & UCL_STRING_PARSE_DOUBLE,
+						flags & UCL_STRING_PARSE_BYTES,
+						flags & UCL_STRING_PARSE_TIME);
+			}
+		}
+	}
+
+	return obj;
+}
+
+static bool
+ucl_object_insert_key_common (ucl_object_t *top, ucl_object_t *elt,
+		const char *key, size_t keylen, bool copy_key, bool merge, bool replace)
+{
+	ucl_object_t *found, *tmp;
+	const ucl_object_t *cur;
+	ucl_object_iter_t it = NULL;
+	const char *p;
+	int ret = true;
+
+	if (elt == NULL || key == NULL) {
+		return false;
+	}
+
+	if (top == NULL) {
+		return false;
+	}
+
+	if (top->type != UCL_OBJECT) {
+		/* It is possible to convert NULL type to an object */
+		if (top->type == UCL_NULL) {
+			top->type = UCL_OBJECT;
+		}
+		else {
+			/* Refuse converting of other object types */
+			return false;
+		}
+	}
+
+	if (top->value.ov == NULL) {
+		top->value.ov = ucl_hash_create (false);
+	}
+
+	if (keylen == 0) {
+		keylen = strlen (key);
+	}
+
+	for (p = key; p < key + keylen; p ++) {
+		if (ucl_test_character (*p, UCL_CHARACTER_UCL_UNSAFE)) {
+			elt->flags |= UCL_OBJECT_NEED_KEY_ESCAPE;
+			break;
+		}
+	}
+
+	/* workaround for some use cases */
+	if (elt->trash_stack[UCL_TRASH_KEY] != NULL &&
+			key != (const char *)elt->trash_stack[UCL_TRASH_KEY]) {
+		/* Remove copied key */
+		free (elt->trash_stack[UCL_TRASH_KEY]);
+		elt->trash_stack[UCL_TRASH_KEY] = NULL;
+		elt->flags &= ~UCL_OBJECT_ALLOCATED_KEY;
+	}
+
+	elt->key = key;
+	elt->keylen = keylen;
+
+	if (copy_key) {
+		ucl_copy_key_trash (elt);
+	}
+
+	found = __DECONST (ucl_object_t *, ucl_hash_search_obj (top->value.ov, elt));
+
+	if (found == NULL) {
+		top->value.ov = ucl_hash_insert_object (top->value.ov, elt, false);
+		top->len ++;
+		if (replace) {
+			ret = false;
+		}
+	}
+	else {
+		if (replace) {
+			ucl_hash_replace (top->value.ov, found, elt);
+			ucl_object_unref (found);
+		}
+		else if (merge) {
+			if (found->type != UCL_OBJECT && elt->type == UCL_OBJECT) {
+				/* Insert old elt to new one */
+				ucl_object_insert_key_common (elt, found, found->key,
+						found->keylen, copy_key, false, false);
+				ucl_hash_delete (top->value.ov, found);
+				top->value.ov = ucl_hash_insert_object (top->value.ov, elt, false);
+			}
+			else if (found->type == UCL_OBJECT && elt->type != UCL_OBJECT) {
+				/* Insert new to old */
+				ucl_object_insert_key_common (found, elt, elt->key,
+						elt->keylen, copy_key, false, false);
+			}
+			else if (found->type == UCL_OBJECT && elt->type == UCL_OBJECT) {
+				/* Mix two hashes */
+				while ((cur = ucl_iterate_object (elt, &it, true)) != NULL) {
+					tmp = ucl_object_ref (cur);
+					ucl_object_insert_key_common (found, tmp, cur->key,
+							cur->keylen, copy_key, false, false);
+				}
+				ucl_object_unref (elt);
+			}
+			else {
+				/* Just make a list of scalars */
+				DL_APPEND (found, elt);
+			}
+		}
+		else {
+			DL_APPEND (found, elt);
+		}
+	}
+
+	return ret;
+}
+
+bool
+ucl_object_delete_keyl (ucl_object_t *top, const char *key, size_t keylen)
+{
+	ucl_object_t *found;
+
+	if (top == NULL || key == NULL) {
+		return false;
+	}
+
+	found = __DECONST (ucl_object_t *, ucl_object_find_keyl (top, key, keylen));
+
+	if (found == NULL) {
+		return false;
+	}
+
+	ucl_hash_delete (top->value.ov, found);
+	ucl_object_unref (found);
+	top->len --;
+
+	return true;
+}
+
+bool
+ucl_object_delete_key (ucl_object_t *top, const char *key)
+{
+	return ucl_object_delete_keyl (top, key, strlen(key));
+}
+
+ucl_object_t*
+ucl_object_pop_keyl (ucl_object_t *top, const char *key, size_t keylen)
+{
+	const ucl_object_t *found;
+
+	if (top == NULL || key == NULL) {
+		return false;
+	}
+	found = ucl_object_find_keyl (top, key, keylen);
+
+	if (found == NULL) {
+		return NULL;
+	}
+	ucl_hash_delete (top->value.ov, found);
+	top->len --;
+
+	return __DECONST (ucl_object_t *, found);
+}
+
+ucl_object_t*
+ucl_object_pop_key (ucl_object_t *top, const char *key)
+{
+	return ucl_object_pop_keyl (top, key, strlen(key));
+}
+
+bool
+ucl_object_insert_key (ucl_object_t *top, ucl_object_t *elt,
+		const char *key, size_t keylen, bool copy_key)
+{
+	return ucl_object_insert_key_common (top, elt, key, keylen, copy_key, false, false);
+}
+
+bool
+ucl_object_insert_key_merged (ucl_object_t *top, ucl_object_t *elt,
+		const char *key, size_t keylen, bool copy_key)
+{
+	return ucl_object_insert_key_common (top, elt, key, keylen, copy_key, true, false);
+}
+
+bool
+ucl_object_replace_key (ucl_object_t *top, ucl_object_t *elt,
+		const char *key, size_t keylen, bool copy_key)
+{
+	return ucl_object_insert_key_common (top, elt, key, keylen, copy_key, false, true);
+}
+
+bool
+ucl_object_merge (ucl_object_t *top, ucl_object_t *elt, bool copy)
+{
+	ucl_object_t *cur = NULL, *cp = NULL, *found = NULL;
+	ucl_object_iter_t iter = NULL;
+
+	if (top == NULL || top->type != UCL_OBJECT || elt == NULL || elt->type != UCL_OBJECT) {
+		return false;
+	}
+
+	/* Mix two hashes */
+	while ((cur = (ucl_object_t*)ucl_hash_iterate (elt->value.ov, &iter))) {
+		if (copy) {
+			cp = ucl_object_copy (cur);
+		}
+		else {
+			cp = ucl_object_ref (cur);
+		}
+		found = __DECONST(ucl_object_t *, ucl_hash_search (top->value.ov, cp->key, cp->keylen));
+		if (found == NULL) {
+			/* The key does not exist */
+			top->value.ov = ucl_hash_insert_object (top->value.ov, cp, false);
+			top->len ++;
+		}
+		else {
+			/* The key already exists, replace it */
+			ucl_hash_replace (top->value.ov, found, cp);
+			ucl_object_unref (found);
+		}
+	}
+
+	return true;
+}
+
+const ucl_object_t *
+ucl_object_find_keyl (const ucl_object_t *obj, const char *key, size_t klen)
+{
+	const ucl_object_t *ret;
+	ucl_object_t srch;
+
+	if (obj == NULL || obj->type != UCL_OBJECT || key == NULL) {
+		return NULL;
+	}
+
+	srch.key = key;
+	srch.keylen = klen;
+	ret = ucl_hash_search_obj (obj->value.ov, &srch);
+
+	return ret;
+}
+
+const ucl_object_t *
+ucl_object_find_key (const ucl_object_t *obj, const char *key)
+{
+	if (key == NULL)
+		return NULL;
+
+	return ucl_object_find_keyl (obj, key, strlen(key));
+}
+
+const ucl_object_t*
+ucl_iterate_object (const ucl_object_t *obj, ucl_object_iter_t *iter, bool expand_values)
+{
+	const ucl_object_t *elt = NULL;
+
+	if (obj == NULL || iter == NULL) {
+		return NULL;
+	}
+
+	if (expand_values) {
+		switch (obj->type) {
+		case UCL_OBJECT:
+			return (const ucl_object_t*)ucl_hash_iterate (obj->value.ov, iter);
+			break;
+		case UCL_ARRAY: {
+			unsigned int idx;
+			UCL_ARRAY_GET (vec, obj);
+			idx = (unsigned int)(uintptr_t)(*iter);
+
+			if (vec != NULL) {
+				while (idx < kv_size (*vec)) {
+					if ((elt = kv_A (*vec, idx)) != NULL) {
+						idx ++;
+						break;
+					}
+					idx ++;
+				}
+				*iter = (void *)(uintptr_t)idx;
+			}
+
+			return elt;
+			break;
+		}
+		default:
+			/* Go to linear iteration */
+			break;
+		}
+	}
+	/* Treat everything as a linear list */
+	elt = *iter;
+	if (elt == NULL) {
+		elt = obj;
+	}
+	else if (elt == obj) {
+		return NULL;
+	}
+	*iter = __DECONST (void *, elt->next ? elt->next : obj);
+	return elt;
+
+	/* Not reached */
+	return NULL;
+}
+
+const char safe_iter_magic[4] = {'u', 'i', 't', 'e'};
+struct ucl_object_safe_iter {
+	char magic[4]; /* safety check */
+	const ucl_object_t *impl_it; /* implicit object iteration */
+	ucl_object_iter_t expl_it; /* explicit iteration */
+};
+
+#define UCL_SAFE_ITER(ptr) (struct ucl_object_safe_iter *)(ptr)
+#define UCL_SAFE_ITER_CHECK(it) do { \
+	assert (it != NULL); \
+	assert (memcmp (it->magic, safe_iter_magic, sizeof (it->magic)) == 0); \
+ } while (0)
+
+ucl_object_iter_t
+ucl_object_iterate_new (const ucl_object_t *obj)
+{
+	struct ucl_object_safe_iter *it;
+
+	it = UCL_ALLOC (sizeof (*it));
+	if (it != NULL) {
+		memcpy (it->magic, safe_iter_magic, sizeof (it->magic));
+		it->expl_it = NULL;
+		it->impl_it = obj;
+	}
+
+	return (ucl_object_iter_t)it;
+}
+
+
+ucl_object_iter_t
+ucl_object_iterate_reset (ucl_object_iter_t it, const ucl_object_t *obj)
+{
+	struct ucl_object_safe_iter *rit = UCL_SAFE_ITER (it);
+
+	UCL_SAFE_ITER_CHECK (rit);
+
+	rit->impl_it = obj;
+	rit->expl_it = NULL;
+
+	return it;
+}
+
+const ucl_object_t*
+ucl_object_iterate_safe (ucl_object_iter_t it, bool expand_values)
+{
+	struct ucl_object_safe_iter *rit = UCL_SAFE_ITER (it);
+	const ucl_object_t *ret = NULL;
+
+	UCL_SAFE_ITER_CHECK (rit);
+
+	if (rit->impl_it == NULL) {
+		return NULL;
+	}
+
+	if (rit->impl_it->type == UCL_OBJECT || rit->impl_it->type == UCL_ARRAY) {
+		ret = ucl_iterate_object (rit->impl_it, &rit->expl_it, true);
+
+		if (ret == NULL) {
+			/* Need to switch to another implicit object in chain */
+			rit->impl_it = rit->impl_it->next;
+			rit->expl_it = NULL;
+			return ucl_object_iterate_safe (it, expand_values);
+		}
+	}
+	else {
+		/* Just iterate over the implicit array */
+		ret = rit->impl_it;
+		rit->impl_it = rit->impl_it->next;
+		if (expand_values) {
+			/* We flatten objects if need to expand values */
+			if (ret->type == UCL_OBJECT || ret->type == UCL_ARRAY) {
+				return ucl_object_iterate_safe (it, expand_values);
+			}
+		}
+	}
+
+	return ret;
+}
+
+void
+ucl_object_iterate_free (ucl_object_iter_t it)
+{
+	struct ucl_object_safe_iter *rit = UCL_SAFE_ITER (it);
+
+	UCL_SAFE_ITER_CHECK (rit);
+
+	UCL_FREE (sizeof (*rit), it);
+}
+
+const ucl_object_t *
+ucl_lookup_path (const ucl_object_t *top, const char *path_in) {
+	const ucl_object_t *o = NULL, *found;
+	const char *p, *c;
+	char *err_str;
+	unsigned index;
+
+	if (path_in == NULL || top == NULL) {
+		return NULL;
+	}
+
+	found = NULL;
+	p = path_in;
+
+	/* Skip leading dots */
+	while (*p == '.') {
+		p ++;
+	}
+
+	c = p;
+	while (*p != '\0') {
+		p ++;
+		if (*p == '.' || *p == '\0') {
+			if (p > c) {
+				switch (top->type) {
+				case UCL_ARRAY:
+					/* Key should be an int */
+					index = strtoul (c, &err_str, 10);
+					if (err_str != NULL && (*err_str != '.' && *err_str != '\0')) {
+						return NULL;
+					}
+					o = ucl_array_find_index (top, index);
+					break;
+				default:
+					o = ucl_object_find_keyl (top, c, p - c);
+					break;
+				}
+				if (o == NULL) {
+					return NULL;
+				}
+				top = o;
+			}
+			if (*p != '\0') {
+				c = p + 1;
+			}
+		}
+	}
+	found = o;
+
+	return found;
+}
+
+
+ucl_object_t *
+ucl_object_new (void)
+{
+	return ucl_object_typed_new (UCL_NULL);
+}
+
+ucl_object_t *
+ucl_object_typed_new (ucl_type_t type)
+{
+	return ucl_object_new_full (type, 0);
+}
+
+ucl_object_t *
+ucl_object_new_full (ucl_type_t type, unsigned priority)
+{
+	ucl_object_t *new;
+
+	if (type != UCL_USERDATA) {
+		new = UCL_ALLOC (sizeof (ucl_object_t));
+		if (new != NULL) {
+			memset (new, 0, sizeof (ucl_object_t));
+			new->ref = 1;
+			new->type = (type <= UCL_NULL ? type : UCL_NULL);
+			new->next = NULL;
+			new->prev = new;
+			ucl_object_set_priority (new, priority);
+
+			if (type == UCL_ARRAY) {
+				new->value.av = UCL_ALLOC (sizeof (ucl_array_t));
+				if (new->value.av) {
+					memset (new->value.av, 0, sizeof (ucl_array_t));
+					UCL_ARRAY_GET (vec, new);
+
+					/* Preallocate some space for arrays */
+					kv_resize (ucl_object_t *, *vec, 8);
+				}
+			}
+		}
+	}
+	else {
+		new = ucl_object_new_userdata (NULL, NULL);
+		ucl_object_set_priority (new, priority);
+	}
+
+	return new;
+}
+
+ucl_object_t*
+ucl_object_new_userdata (ucl_userdata_dtor dtor, ucl_userdata_emitter emitter)
+{
+	struct ucl_object_userdata *new;
+	size_t nsize = sizeof (*new);
+
+	new = UCL_ALLOC (nsize);
+	if (new != NULL) {
+		memset (new, 0, nsize);
+		new->obj.ref = 1;
+		new->obj.type = UCL_USERDATA;
+		new->obj.next = NULL;
+		new->obj.prev = (ucl_object_t *)new;
+		new->dtor = dtor;
+		new->emitter = emitter;
+	}
+
+	return (ucl_object_t *)new;
+}
+
+ucl_type_t
+ucl_object_type (const ucl_object_t *obj)
+{
+	return obj->type;
+}
+
+ucl_object_t*
+ucl_object_fromstring (const char *str)
+{
+	return ucl_object_fromstring_common (str, 0, UCL_STRING_ESCAPE);
+}
+
+ucl_object_t *
+ucl_object_fromlstring (const char *str, size_t len)
+{
+	return ucl_object_fromstring_common (str, len, UCL_STRING_ESCAPE);
+}
+
+ucl_object_t *
+ucl_object_fromint (int64_t iv)
+{
+	ucl_object_t *obj;
+
+	obj = ucl_object_new ();
+	if (obj != NULL) {
+		obj->type = UCL_INT;
+		obj->value.iv = iv;
+	}
+
+	return obj;
+}
+
+ucl_object_t *
+ucl_object_fromdouble (double dv)
+{
+	ucl_object_t *obj;
+
+	obj = ucl_object_new ();
+	if (obj != NULL) {
+		obj->type = UCL_FLOAT;
+		obj->value.dv = dv;
+	}
+
+	return obj;
+}
+
+ucl_object_t*
+ucl_object_frombool (bool bv)
+{
+	ucl_object_t *obj;
+
+	obj = ucl_object_new ();
+	if (obj != NULL) {
+		obj->type = UCL_BOOLEAN;
+		obj->value.iv = bv;
+	}
+
+	return obj;
+}
+
+bool
+ucl_array_append (ucl_object_t *top, ucl_object_t *elt)
+{
+	UCL_ARRAY_GET (vec, top);
+
+	if (elt == NULL || top == NULL) {
+		return false;
+	}
+
+	if (vec == NULL) {
+		vec = UCL_ALLOC (sizeof (*vec));
+		kv_init (*vec);
+		top->value.av = (void *)vec;
+	}
+
+	kv_push (ucl_object_t *, *vec, elt);
+
+	top->len ++;
+
+	return true;
+}
+
+bool
+ucl_array_prepend (ucl_object_t *top, ucl_object_t *elt)
+{
+	UCL_ARRAY_GET (vec, top);
+
+	if (elt == NULL || top == NULL) {
+		return false;
+	}
+
+	if (vec == NULL) {
+		vec = UCL_ALLOC (sizeof (*vec));
+		kv_init (*vec);
+		top->value.av = (void *)vec;
+		kv_push (ucl_object_t *, *vec, elt);
+	}
+	else {
+		/* Slow O(n) algorithm */
+		kv_prepend (ucl_object_t *, *vec, elt);
+	}
+
+	top->len ++;
+
+	return true;
+}
+
+bool
+ucl_array_merge (ucl_object_t *top, ucl_object_t *elt, bool copy)
+{
+	unsigned i;
+	ucl_object_t **obj;
+	UCL_ARRAY_GET (v1, top);
+	UCL_ARRAY_GET (v2, elt);
+
+	if (elt == NULL || top == NULL || top->type != UCL_ARRAY || elt->type != UCL_ARRAY) {
+		return false;
+	}
+
+	kv_concat (ucl_object_t *, *v1, *v2);
+
+	for (i = v2->n; i < v1->n; i ++) {
+		obj = &kv_A (*v1, i);
+		if (*obj == NULL) {
+			continue;
+		}
+
+		top->len ++;
+		if (copy) {
+			*obj = ucl_object_copy (*obj);
+		}
+		else {
+			ucl_object_ref (*obj);
+		}
+	}
+
+	return true;
+}
+
+ucl_object_t *
+ucl_array_delete (ucl_object_t *top, ucl_object_t *elt)
+{
+	UCL_ARRAY_GET (vec, top);
+	ucl_object_t *ret = NULL;
+	unsigned i;
+
+	for (i = 0; i < vec->n; i ++) {
+		if (kv_A (*vec, i) == elt) {
+			kv_del (ucl_object_t *, *vec, i);
+			ret = elt;
+			top->len --;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+const ucl_object_t *
+ucl_array_head (const ucl_object_t *top)
+{
+	UCL_ARRAY_GET (vec, top);
+
+	if (top == NULL || top->type != UCL_ARRAY || top->value.av == NULL) {
+		return NULL;
+	}
+
+	return (vec->n > 0 ? vec->a[0] : NULL);
+}
+
+const ucl_object_t *
+ucl_array_tail (const ucl_object_t *top)
+{
+	UCL_ARRAY_GET (vec, top);
+
+	if (top == NULL || top->type != UCL_ARRAY || top->value.av == NULL) {
+		return NULL;
+	}
+
+	return (vec->n > 0 ? vec->a[vec->n - 1] : NULL);
+}
+
+ucl_object_t *
+ucl_array_pop_last (ucl_object_t *top)
+{
+	UCL_ARRAY_GET (vec, top);
+	ucl_object_t **obj, *ret = NULL;
+
+	if (vec != NULL && vec->n > 0) {
+		obj = &kv_A (*vec, vec->n - 1);
+		ret = *obj;
+		kv_del (ucl_object_t *, *vec, vec->n - 1);
+		top->len --;
+	}
+
+	return ret;
+}
+
+ucl_object_t *
+ucl_array_pop_first (ucl_object_t *top)
+{
+	UCL_ARRAY_GET (vec, top);
+	ucl_object_t **obj, *ret = NULL;
+
+	if (vec != NULL && vec->n > 0) {
+		obj = &kv_A (*vec, 0);
+		ret = *obj;
+		kv_del (ucl_object_t *, *vec, 0);
+		top->len --;
+	}
+
+	return ret;
+}
+
+const ucl_object_t *
+ucl_array_find_index (const ucl_object_t *top, unsigned int index)
+{
+	UCL_ARRAY_GET (vec, top);
+
+	if (vec != NULL && vec->n > 0 && index < vec->n) {
+		return kv_A (*vec, index);
+	}
+
+	return NULL;
+}
+
+ucl_object_t *
+ucl_array_replace_index (ucl_object_t *top, ucl_object_t *elt,
+	unsigned int index)
+{
+	UCL_ARRAY_GET (vec, top);
+	ucl_object_t *ret = NULL;
+
+	if (vec != NULL && vec->n > 0 && index < vec->n) {
+		ret = kv_A (*vec, index);
+		kv_A (*vec, index) = elt;
+	}
+
+	return ret;
+}
+
+ucl_object_t *
+ucl_elt_append (ucl_object_t *head, ucl_object_t *elt)
+{
+
+	if (head == NULL) {
+		elt->next = NULL;
+		elt->prev = elt;
+		head = elt;
+	}
+	else {
+		elt->prev = head->prev;
+		head->prev->next = elt;
+		head->prev = elt;
+		elt->next = NULL;
+	}
+
+	return head;
+}
+
+bool
+ucl_object_todouble_safe (const ucl_object_t *obj, double *target)
+{
+	if (obj == NULL || target == NULL) {
+		return false;
+	}
+	switch (obj->type) {
+	case UCL_INT:
+		*target = obj->value.iv; /* Probaly could cause overflow */
+		break;
+	case UCL_FLOAT:
+	case UCL_TIME:
+		*target = obj->value.dv;
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+double
+ucl_object_todouble (const ucl_object_t *obj)
+{
+	double result = 0.;
+
+	ucl_object_todouble_safe (obj, &result);
+	return result;
+}
+
+bool
+ucl_object_toint_safe (const ucl_object_t *obj, int64_t *target)
+{
+	if (obj == NULL || target == NULL) {
+		return false;
+	}
+	switch (obj->type) {
+	case UCL_INT:
+		*target = obj->value.iv;
+		break;
+	case UCL_FLOAT:
+	case UCL_TIME:
+		*target = obj->value.dv; /* Loosing of decimal points */
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+int64_t
+ucl_object_toint (const ucl_object_t *obj)
+{
+	int64_t result = 0;
+
+	ucl_object_toint_safe (obj, &result);
+	return result;
+}
+
+bool
+ucl_object_toboolean_safe (const ucl_object_t *obj, bool *target)
+{
+	if (obj == NULL || target == NULL) {
+		return false;
+	}
+	switch (obj->type) {
+	case UCL_BOOLEAN:
+		*target = (obj->value.iv == true);
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+bool
+ucl_object_toboolean (const ucl_object_t *obj)
+{
+	bool result = false;
+
+	ucl_object_toboolean_safe (obj, &result);
+	return result;
+}
+
+bool
+ucl_object_tostring_safe (const ucl_object_t *obj, const char **target)
+{
+	if (obj == NULL || target == NULL) {
+		return false;
+	}
+
+	switch (obj->type) {
+	case UCL_STRING:
+		*target = ucl_copy_value_trash (obj);
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+const char *
+ucl_object_tostring (const ucl_object_t *obj)
+{
+	const char *result = NULL;
+
+	ucl_object_tostring_safe (obj, &result);
+	return result;
+}
+
+const char *
+ucl_object_tostring_forced (const ucl_object_t *obj)
+{
+	return ucl_copy_value_trash (obj);
+}
+
+bool
+ucl_object_tolstring_safe (const ucl_object_t *obj, const char **target, size_t *tlen)
+{
+	if (obj == NULL || target == NULL) {
+		return false;
+	}
+	switch (obj->type) {
+	case UCL_STRING:
+		*target = obj->value.sv;
+		if (tlen != NULL) {
+			*tlen = obj->len;
+		}
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+const char *
+ucl_object_tolstring (const ucl_object_t *obj, size_t *tlen)
+{
+	const char *result = NULL;
+
+	ucl_object_tolstring_safe (obj, &result, tlen);
+	return result;
+}
+
+const char *
+ucl_object_key (const ucl_object_t *obj)
+{
+	return ucl_copy_key_trash (obj);
+}
+
+const char *
+ucl_object_keyl (const ucl_object_t *obj, size_t *len)
+{
+	if (len == NULL || obj == NULL) {
+		return NULL;
+	}
+	*len = obj->keylen;
+	return obj->key;
+}
+
+ucl_object_t *
+ucl_object_ref (const ucl_object_t *obj)
+{
+	ucl_object_t *res = NULL;
+
+	if (obj != NULL) {
+		if (obj->flags & UCL_OBJECT_EPHEMERAL) {
+			/*
+			 * Use deep copy for ephemeral objects, note that its refcount
+			 * is NOT increased, since ephemeral objects does not need refcount
+			 * at all
+			 */
+			res = ucl_object_copy (obj);
+		}
+		else {
+			res = __DECONST (ucl_object_t *, obj);
+#ifdef HAVE_ATOMIC_BUILTINS
+			(void)__sync_add_and_fetch (&res->ref, 1);
+#else
+			res->ref ++;
+#endif
+		}
+	}
+	return res;
+}
+
+static ucl_object_t *
+ucl_object_copy_internal (const ucl_object_t *other, bool allow_array)
+{
+
+	ucl_object_t *new;
+	ucl_object_iter_t it = NULL;
+	const ucl_object_t *cur;
+
+	new = malloc (sizeof (*new));
+
+	if (new != NULL) {
+		memcpy (new, other, sizeof (*new));
+		if (other->flags & UCL_OBJECT_EPHEMERAL) {
+			/* Copied object is always non ephemeral */
+			new->flags &= ~UCL_OBJECT_EPHEMERAL;
+		}
+		new->ref = 1;
+		/* Unlink from others */
+		new->next = NULL;
+		new->prev = new;
+
+		/* deep copy of values stored */
+		if (other->trash_stack[UCL_TRASH_KEY] != NULL) {
+			new->trash_stack[UCL_TRASH_KEY] =
+					strdup (other->trash_stack[UCL_TRASH_KEY]);
+			if (other->key == (const char *)other->trash_stack[UCL_TRASH_KEY]) {
+				new->key = new->trash_stack[UCL_TRASH_KEY];
+			}
+		}
+		if (other->trash_stack[UCL_TRASH_VALUE] != NULL) {
+			new->trash_stack[UCL_TRASH_VALUE] =
+					strdup (other->trash_stack[UCL_TRASH_VALUE]);
+			if (new->type == UCL_STRING) {
+				new->value.sv = new->trash_stack[UCL_TRASH_VALUE];
+			}
+		}
+
+		if (other->type == UCL_ARRAY || other->type == UCL_OBJECT) {
+			/* reset old value */
+			memset (&new->value, 0, sizeof (new->value));
+
+			while ((cur = ucl_iterate_object (other, &it, true)) != NULL) {
+				if (other->type == UCL_ARRAY) {
+					ucl_array_append (new, ucl_object_copy_internal (cur, false));
+				}
+				else {
+					ucl_object_t *cp = ucl_object_copy_internal (cur, true);
+					if (cp != NULL) {
+						ucl_object_insert_key (new, cp, cp->key, cp->keylen,
+								false);
+					}
+				}
+			}
+		}
+		else if (allow_array && other->next != NULL) {
+			LL_FOREACH (other->next, cur) {
+				ucl_object_t *cp = ucl_object_copy_internal (cur, false);
+				if (cp != NULL) {
+					DL_APPEND (new, cp);
+				}
+			}
+		}
+	}
+
+	return new;
+}
+
+ucl_object_t *
+ucl_object_copy (const ucl_object_t *other)
+{
+	return ucl_object_copy_internal (other, true);
+}
+
+void
+ucl_object_unref (ucl_object_t *obj)
+{
+	if (obj != NULL) {
+#ifdef HAVE_ATOMIC_BUILTINS
+		unsigned int rc = __sync_sub_and_fetch (&obj->ref, 1);
+		if (rc == 0) {
+#else
+		if (--obj->ref == 0) {
+#endif
+			ucl_object_free_internal (obj, true, ucl_object_dtor_unref);
+		}
+	}
+}
+
+int
+ucl_object_compare (const ucl_object_t *o1, const ucl_object_t *o2)
+{
+	const ucl_object_t *it1, *it2;
+	ucl_object_iter_t iter = NULL;
+	int ret = 0;
+
+	if (o1->type != o2->type) {
+		return (o1->type) - (o2->type);
+	}
+
+	switch (o1->type) {
+	case UCL_STRING:
+		if (o1->len == o2->len && o1->len > 0) {
+			ret = strcmp (ucl_object_tostring(o1), ucl_object_tostring(o2));
+		}
+		else {
+			ret = o1->len - o2->len;
+		}
+		break;
+	case UCL_FLOAT:
+	case UCL_INT:
+	case UCL_TIME:
+		ret = ucl_object_todouble (o1) - ucl_object_todouble (o2);
+		break;
+	case UCL_BOOLEAN:
+		ret = ucl_object_toboolean (o1) - ucl_object_toboolean (o2);
+		break;
+	case UCL_ARRAY:
+		if (o1->len == o2->len && o1->len > 0) {
+			UCL_ARRAY_GET (vec1, o1);
+			UCL_ARRAY_GET (vec2, o2);
+			unsigned i;
+
+			/* Compare all elements in both arrays */
+			for (i = 0; i < vec1->n; i ++) {
+				it1 = kv_A (*vec1, i);
+				it2 = kv_A (*vec2, i);
+
+				if (it1 == NULL && it2 != NULL) {
+					return -1;
+				}
+				else if (it2 == NULL && it1 != NULL) {
+					return 1;
+				}
+				else if (it1 != NULL && it2 != NULL) {
+					ret = ucl_object_compare (it1, it2);
+					if (ret != 0) {
+						break;
+					}
+				}
+			}
+		}
+		else {
+			ret = o1->len - o2->len;
+		}
+		break;
+	case UCL_OBJECT:
+		if (o1->len == o2->len && o1->len > 0) {
+			while ((it1 = ucl_iterate_object (o1, &iter, true)) != NULL) {
+				it2 = ucl_object_find_key (o2, ucl_object_key (it1));
+				if (it2 == NULL) {
+					ret = 1;
+					break;
+				}
+				ret = ucl_object_compare (it1, it2);
+				if (ret != 0) {
+					break;
+				}
+			}
+		}
+		else {
+			ret = o1->len - o2->len;
+		}
+		break;
+	default:
+		ret = 0;
+		break;
+	}
+
+	return ret;
+}
+
+void
+ucl_object_array_sort (ucl_object_t *ar,
+		int (*cmp)(const ucl_object_t *o1, const ucl_object_t *o2))
+{
+	UCL_ARRAY_GET (vec, ar);
+
+	if (cmp == NULL || ar == NULL || ar->type != UCL_ARRAY) {
+		return;
+	}
+
+	qsort (vec->a, vec->n, sizeof (ucl_object_t *),
+			(int (*)(const void *, const void *))cmp);
+}
+
+#define PRIOBITS 4
+
+unsigned int
+ucl_object_get_priority (const ucl_object_t *obj)
+{
+	if (obj == NULL) {
+		return 0;
+	}
+
+	return (obj->flags >> ((sizeof (obj->flags) * NBBY) - PRIOBITS));
+}
+
+void
+ucl_object_set_priority (ucl_object_t *obj,
+		unsigned int priority)
+{
+	if (obj != NULL) {
+		priority &= (0x1 << PRIOBITS) - 1;
+		obj->flags |= priority << ((sizeof (obj->flags) * NBBY) - PRIOBITS);
+	}
+}