Merge some old work to include (some of) PR #464 into the current master branch.

27 files changed, 274 insertions, 110 deletions

diff --git a/.clang-format b/.clang-format
index d6972be..365efb2 100644
--- a/.clang-format
+++ b/.clang-format
@@ -23,6 +23,8 @@ AllowShortFunctionsOnASingleLine:  Empty
 BreakBeforeBraces: Custom
 # Control of individual brace wrapping cases.
 BraceWrapping:
+  # Wrap brackets inside of a case
+  AfterCaseLabel: true
   # Wrap class definition.
   AfterClass: true
   # Wrap control statements
diff --git a/.gitignore b/.gitignore
index 1cdaf9b..8d2cb62 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,6 +70,7 @@
 # It's not good practice to build directly in the source tree
 # but ignore cmake auto-generated files anyway:
 /json_config.h
+/json.h
 /config.h
 /json-c.pc
 /Makefile
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2333d08..ed7bc03 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -79,6 +79,10 @@ include(CMakePackageConfigHelpers)
 option(BUILD_SHARED_LIBS  "Default to building shared libraries" ON)
 option(BUILD_STATIC_LIBS  "Default to building static libraries" ON)
 
+if (BUILD_SHARED_LIBS)
+    add_definitions(-D JSON_C_DLL)
+endif()
+
 # Generate a release merge and test it to verify the correctness of republishing the package.
 ADD_CUSTOM_TARGET(distcheck
 COMMAND make package_source
@@ -97,6 +101,8 @@ option(DISABLE_WERROR                 "Avoid treating compiler warnings as fatal
 option(ENABLE_RDRAND                  "Enable RDRAND Hardware RNG Hash Seed."                 OFF)
 option(ENABLE_THREADING               "Enable partial threading support."                     OFF)
 option(OVERRIDE_GET_RANDOM_SEED       "Override json_c_get_random_seed() with custom code."   OFF)
+option(DISABLE_EXTRA_LIBS             "Avoid linking against extra libraries, such as libbsd." OFF)
+option(DISABLE_JSON_POINTER           "Disable JSON pointer (RFC6901) support."               OFF)
 
 
 if (UNIX OR MINGW OR CYGWIN)
@@ -148,7 +154,10 @@ check_include_file(sys/random.h     HAVE_SYS_RANDOM_H)
 check_include_file(sys/stat.h       HAVE_SYS_STAT_H)
 check_include_file(xlocale.h        HAVE_XLOCALE_H)
 
-if (HAVE_INTTYPES_H AND NOT MSVC)
+if (HAVE_INTTYPES_H)
+	# Set a json-c specific var to stamp into json_config.h
+	# in a way that hopefull ywon't conflict with other 
+	# projects that use json-c.
     set(JSON_C_HAVE_INTTYPES_H 1)
 endif()
 
@@ -170,6 +179,17 @@ check_symbol_exists(vasprintf       "stdio.h" HAVE_VASPRINTF)
 check_symbol_exists(vsnprintf       "stdio.h" HAVE_VSNPRINTF)
 check_symbol_exists(vprintf         "stdio.h" HAVE_VPRINTF)
 
+check_symbol_exists(arc4random      "stdlib.h" HAVE_ARC4RANDOM)
+if (NOT HAVE_ARC4RANDOM AND DISABLE_EXTRA_LIBS STREQUAL "OFF")
+    check_include_file(bsd/stdlib.h HAVE_BSD_STDLIB_H)
+    if (HAVE_BSD_STDLIB_H)
+		list(APPEND CMAKE_REQUIRED_LIBRARIES "-lbsd")
+		link_libraries(bsd)
+		unset(HAVE_ARC4RANDOM CACHE)
+        check_symbol_exists(arc4random   "bsd/stdlib.h" HAVE_ARC4RANDOM)
+    endif()
+endif()
+
 if (HAVE_FCNTL_H)
     check_symbol_exists(open        "fcntl.h" HAVE_OPEN)
 endif()
@@ -269,7 +289,7 @@ message(STATUS "Wrote ${PROJECT_BINARY_DIR}/config.h")
 configure_file(${PROJECT_SOURCE_DIR}/cmake/json_config.h.in   ${PROJECT_BINARY_DIR}/json_config.h)
 message(STATUS "Wrote ${PROJECT_BINARY_DIR}/json_config.h")
 
-if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
+if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
     set(CMAKE_C_FLAGS           "${CMAKE_C_FLAGS} -ffunction-sections -fdata-sections")
 	if ("${DISABLE_WERROR}" STREQUAL "OFF")
 	    set(CMAKE_C_FLAGS           "${CMAKE_C_FLAGS} -Werror")
@@ -358,14 +378,13 @@ set(JSON_C_PUBLIC_HEADERS
     # Note: config.h is _not_ included here
     ${PROJECT_BINARY_DIR}/json_config.h
 
-    ${PROJECT_SOURCE_DIR}/json.h
+    ${PROJECT_BINARY_DIR}/json.h
     ${PROJECT_SOURCE_DIR}/arraylist.h
     ${PROJECT_SOURCE_DIR}/debug.h
     ${PROJECT_SOURCE_DIR}/json_c_version.h
     ${PROJECT_SOURCE_DIR}/json_inttypes.h
     ${PROJECT_SOURCE_DIR}/json_object.h
     ${PROJECT_SOURCE_DIR}/json_object_iterator.h
-    ${PROJECT_SOURCE_DIR}/json_pointer.h
     ${PROJECT_SOURCE_DIR}/json_tokener.h
     ${PROJECT_SOURCE_DIR}/json_types.h
     ${PROJECT_SOURCE_DIR}/json_util.h
@@ -392,7 +411,6 @@ set(JSON_C_SOURCES
     ${PROJECT_SOURCE_DIR}/json_c_version.c
     ${PROJECT_SOURCE_DIR}/json_object.c
     ${PROJECT_SOURCE_DIR}/json_object_iterator.c
-    ${PROJECT_SOURCE_DIR}/json_pointer.c
     ${PROJECT_SOURCE_DIR}/json_tokener.c
     ${PROJECT_SOURCE_DIR}/json_util.c
     ${PROJECT_SOURCE_DIR}/json_visit.c
@@ -402,16 +420,28 @@ set(JSON_C_SOURCES
     ${PROJECT_SOURCE_DIR}/strerror_override.c
 )
 
+if (NOT DISABLE_JSON_POINTER)
+    set(JSON_C_PUBLIC_HEADERS   ${JSON_C_PUBLIC_HEADERS}  ${PROJECT_SOURCE_DIR}/json_pointer.h)
+    set(JSON_C_SOURCES          ${JSON_C_SOURCES}         ${PROJECT_SOURCE_DIR}/json_pointer.c)
+    set(JSON_H_JSON_POINTER "#include \"json_pointer.h\"")
+else()
+    set(JSON_H_JSON_POINTER "")
+endif()
+
+configure_file(json.h.cmakein ${PROJECT_BINARY_DIR}/json.h @ONLY)
+
 include_directories(${PROJECT_SOURCE_DIR})
 include_directories(${PROJECT_BINARY_DIR})
 
 add_subdirectory(doc)
 
 # uninstall
-add_custom_target(uninstall
-  COMMAND cat ${PROJECT_BINARY_DIR}/install_manifest.txt | xargs rm
-  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-)
+if(NOT TARGET uninstall)
+	add_custom_target(uninstall
+	  COMMAND cat ${PROJECT_BINARY_DIR}/install_manifest.txt | xargs rm
+	  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+	)
+endif()
 
 # XXX for a normal full distribution we'll need to figure out
 # XXX how to build both shared and static libraries.
diff --git a/RELEASE_CHECKLIST.txt b/RELEASE_CHECKLIST.txt
index 8e70617..9f6b6db 100644
--- a/RELEASE_CHECKLIST.txt
+++ b/RELEASE_CHECKLIST.txt
@@ -93,7 +93,7 @@ Create the release tarballs:
     echo .git > excludes
     tar -czf json-c-${release}.tar.gz -X excludes json-c-${release}
 
-    echo doc >> excludes
+    echo 'doc/*' >> excludes
     tar -czf json-c-${release}-nodoc.tar.gz -X excludes json-c-${release}
 
 ------------
diff --git a/apps/json_parse.c b/apps/json_parse.c
index bba4622..72b31a8 100644
--- a/apps/json_parse.c
+++ b/apps/json_parse.c
@@ -82,7 +82,8 @@ static int parseit(int fd, int (*callback)(struct json_object *))
 			int parse_end = json_tokener_get_parse_end(tok);
 			if (obj == NULL && jerr != json_tokener_continue)
 			{
-				char *aterr = &buf[start_pos + parse_end];
+				char *aterr = (start_pos + parse_end < sizeof(buf)) ?
+					&buf[start_pos + parse_end] : "";
 				fflush(stdout);
 				int fail_offset = total_read - ret + start_pos + parse_end;
 				fprintf(stderr, "Failed at offset %d: %s %c\n", fail_offset,
diff --git a/arraylist.c b/arraylist.c
index c21b8e1..d8e12d1 100644
--- a/arraylist.c
+++ b/arraylist.c
@@ -45,6 +45,8 @@ struct array_list *array_list_new2(array_list_free_fn *free_fn, int initial_size
 {
 	struct array_list *arr;
 
+	if (initial_size < 0 || (size_t)initial_size >= SIZE_T_MAX / sizeof(void *))
+		return NULL;
 	arr = (struct array_list *)malloc(sizeof(struct array_list));
 	if (!arr)
 		return NULL;
@@ -106,6 +108,8 @@ int array_list_shrink(struct array_list *arr, size_t empty_slots)
 	void *t;
 	size_t new_size;
 
+	if (empty_slots >= SIZE_T_MAX / sizeof(void *) - arr->length)
+		return -1;
 	new_size = arr->length + empty_slots;
 	if (new_size == arr->size)
 		return 0;
diff --git a/arraylist.h b/arraylist.h
index 1b18756..f541706 100644
--- a/arraylist.h
+++ b/arraylist.h
@@ -15,8 +15,8 @@
  *        Although this is exposed by the json_object_get_array() method,
  *        it is not recommended for direct use.
  */
-#ifndef _arraylist_h_
-#define _arraylist_h_
+#ifndef _json_c_arraylist_h_
+#define _json_c_arraylist_h_
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/cmake-configure b/cmake-configure
index c8e44ae..dc695e5 100755
--- a/cmake-configure
+++ b/cmake-configure
@@ -30,6 +30,7 @@ $0 [<configure_options>] [-- [<cmake options>]]
   --enable-static         build static libraries [default=yes]
   --disable-Bsymbolic     Avoid linking with -Bsymbolic-function
   --disable-werror        Avoid treating compiler warnings as fatal errors
+  --disable-extra-libs    Avoid linking against extra libraries, such as libbsd
 
 EOF
 	exit
@@ -73,6 +74,9 @@ while [ $# -gt 0 ] ; do
 	--disable-werror)
 		FLAGS+=(-DDISABLE_WERROR=ON)
 		;;
+	--disable-extra-libs)
+		FLAGS+=(-DDISABLE_EXTRA_LIBS=ON)
+		;;
 	--)
 		shift
 		break
diff --git a/cmake/config.h.in b/cmake/config.h.in
index 9e097cb..be0202a 100644
--- a/cmake/config.h.in
+++ b/cmake/config.h.in
@@ -74,6 +74,12 @@
 /* Define to 1 if you have the <xlocale.h> header file. */
 #cmakedefine HAVE_XLOCALE_H
 
+/* Define to 1 if you have the <bsd/stdlib.h> header file. */
+#cmakedefine HAVE_BSD_STDLIB_H
+
+/* Define to 1 if you have `arc4random' */
+#cmakedefine HAVE_ARC4RANDOM
+
 /* Define to 1 if you don't have `vprintf' but do have `_doprnt.' */
 #cmakedefine HAVE_DOPRNT
 
diff --git a/debug.h b/debug.h
index a24136b..4af0ba9 100644
--- a/debug.h
+++ b/debug.h
@@ -14,8 +14,8 @@
  * @file
  * @brief Do not use, json-c internal, may be changed or removed at any time.
  */
-#ifndef _DEBUG_H_
-#define _DEBUG_H_
+#ifndef _JSON_C_DEBUG_H_
+#define _JSON_C_DEBUG_H_
 
 #include <stdlib.h>
 
@@ -24,7 +24,7 @@ extern "C" {
 #endif
 
 #ifndef JSON_EXPORT
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && defined(JSON_C_DLL)
 #define JSON_EXPORT __declspec(dllexport)
 #else
 #define JSON_EXPORT extern
diff --git a/json.h b/json.h.cmakein
index 6c3b43b..4fed013 100644
--- a/json.h
+++ b/json.h.cmakein
@@ -26,7 +26,7 @@ extern "C" {
 #include "json_c_version.h"
 #include "json_object.h"
 #include "json_object_iterator.h"
-#include "json_pointer.h"
+@JSON_H_JSON_POINTER@
 #include "json_tokener.h"
 #include "json_util.h"
 #include "linkhash.h"
diff --git a/json_c_version.h b/json_c_version.h
index 00de4b3..d15ad64 100644
--- a/json_c_version.h
+++ b/json_c_version.h
@@ -24,7 +24,7 @@ extern "C" {
 #define JSON_C_VERSION "0.15.99"
 
 #ifndef JSON_EXPORT
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && defined(JSON_C_DLL)
 #define JSON_EXPORT __declspec(dllexport)
 #else
 #define JSON_EXPORT extern
diff --git a/json_object.c b/json_object.c
index a555da5..9df5809 100644
--- a/json_object.c
+++ b/json_object.c
@@ -216,7 +216,7 @@ static inline const char *get_string_component(const struct json_object *jso)
 
 static int json_escape_str(struct printbuf *pb, const char *str, size_t len, int flags)
 {
-	int pos = 0, start_offset = 0;
+	size_t pos = 0, start_offset = 0;
 	unsigned char c;
 	while (len--)
 	{
@@ -237,7 +237,7 @@ static int json_escape_str(struct printbuf *pb, const char *str, size_t len, int
 				break;
 			}
 
-			if (pos - start_offset > 0)
+			if (pos > start_offset)
 				printbuf_memappend(pb, str + start_offset, pos - start_offset);
 
 			if (c == '\b')
@@ -263,7 +263,7 @@ static int json_escape_str(struct printbuf *pb, const char *str, size_t len, int
 			if (c < ' ')
 			{
 				char sbuf[7];
-				if (pos - start_offset > 0)
+				if (pos > start_offset)
 					printbuf_memappend(pb, str + start_offset,
 					                   pos - start_offset);
 				snprintf(sbuf, sizeof(sbuf), "\\u00%c%c", json_hex_chars[c >> 4],
@@ -275,7 +275,7 @@ static int json_escape_str(struct printbuf *pb, const char *str, size_t len, int
 				pos++;
 		}
 	}
-	if (pos - start_offset > 0)
+	if (pos > start_offset)
 		printbuf_memappend(pb, str + start_offset, pos - start_offset);
 	return 0;
 }
@@ -1256,17 +1256,17 @@ static struct json_object *_json_object_new_string(const char *s, const size_t l
 	struct json_object_string *jso;
 
 	/*
-     * Structures           Actual memory layout
-     * -------------------  --------------------
+	 * Structures           Actual memory layout
+	 * -------------------  --------------------
 	 * [json_object_string  [json_object_string
 	 *  [json_object]        [json_object]
-     *  ...other fields...   ...other fields...
+	 *  ...other fields...   ...other fields...
 	 *  c_string]            len
-     *                       bytes
+	 *                       bytes
 	 *                       of
 	 *                       string
 	 *                       data
-     *                       \0]
+	 *                       \0]
 	 */
 	if (len > (SSIZE_T_MAX - (sizeof(*jso) - sizeof(jso->c_string)) - 1))
 		return NULL;
@@ -1333,9 +1333,10 @@ static int _json_object_set_string_len(json_object *jso, const char *s, size_t l
 	if (jso == NULL || jso->o_type != json_type_string)
 		return 0;
 
-	if (len >= SSIZE_T_MAX - 1)
+	if (len >= INT_MAX - 1)
 		// jso->len is a signed ssize_t, so it can't hold the
-		// full size_t range.
+		// full size_t range. json_object_get_string_len returns
+		// length as int, cap length at INT_MAX.
 		return 0;
 
 	dstbuf = get_string_component_mutable(jso);
@@ -1732,7 +1733,7 @@ static int json_object_deep_copy_recursive(struct json_object *src, struct json_
 			/* This handles the `json_type_null` case */
 			if (!iter.val)
 				jso = NULL;
-			else if (json_object_deep_copy_recursive(iter.val, src, iter.key, -1, &jso,
+			else if (json_object_deep_copy_recursive(iter.val, src, iter.key, UINT_MAX, &jso,
 			                                         shallow_copy) < 0)
 			{
 				json_object_put(jso);
@@ -1797,7 +1798,7 @@ int json_object_deep_copy(struct json_object *src, struct json_object **dst,
 	if (shallow_copy == NULL)
 		shallow_copy = json_c_shallow_copy_default;
 
-	rc = json_object_deep_copy_recursive(src, NULL, NULL, -1, dst, shallow_copy);
+	rc = json_object_deep_copy_recursive(src, NULL, NULL, UINT_MAX, dst, shallow_copy);
 	if (rc < 0)
 	{
 		json_object_put(*dst);
diff --git a/json_object.h b/json_object.h
index a54541c..d67f384 100644
--- a/json_object.h
+++ b/json_object.h
@@ -470,7 +470,7 @@ JSON_EXPORT void json_object_object_del(struct json_object *obj, const char *key
  * @param val the local name for the json_object* object variable defined in
  *            the body
  */
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && __STDC_VERSION__ >= 199901L
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
 
 #define json_object_object_foreach(obj, key, val)                                \
 	char *key = NULL;                                                        \
@@ -502,7 +502,7 @@ JSON_EXPORT void json_object_object_del(struct json_object *obj, const char *key
 	                 : 0);                                                 \
 	     entry##key = entry_next##key)
 
-#endif /* defined(__GNUC__) && !defined(__STRICT_ANSI__) && __STDC_VERSION__ >= 199901L */
+#endif /* defined(__GNUC__) && !defined(__STRICT_ANSI__) && (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) */
 
 /** Iterate through all keys and values of an object (ANSI C Safe)
  * @param obj the json_object instance
@@ -656,8 +656,9 @@ JSON_EXPORT struct json_object *json_object_new_boolean(json_bool b);
  * The type is coerced to a json_bool if the passed object is not a json_bool.
  * integer and double objects will return 0 if there value is zero
  * or 1 otherwise. If the passed object is a string it will return
- * 1 if it has a non zero length. If any other object type is passed
- * 1 will be returned if the object is not NULL.
+ * 1 if it has a non zero length. 
+ * If any other object type is passed 0 will be returned, even non-empty
+ *  json_type_array and json_type_object objects.
  *
  * @param obj the json_object instance
  * @returns a json_bool
diff --git a/json_tokener.c b/json_tokener.c
index e16db6b..1a74155 100644
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -155,6 +155,12 @@ struct json_tokener *json_tokener_new_ex(int depth)
 		return NULL;
 	}
 	tok->pb = printbuf_new();
+	if (!tok->pb)
+	{
+		free(tok);
+		free(tok->stack);
+		return NULL;
+	}
 	tok->max_depth = depth;
 	json_tokener_reset(tok);
 	return tok;
diff --git a/json_types.h b/json_types.h
index 67f4497..b7e55ad 100644
--- a/json_types.h
+++ b/json_types.h
@@ -18,7 +18,7 @@ extern "C" {
 #endif
 
 #ifndef JSON_EXPORT
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && defined(JSON_C_DLL)
 #define JSON_EXPORT __declspec(dllexport)
 #else
 #define JSON_EXPORT extern
diff --git a/linkhash.h b/linkhash.h
index 414599d..0ddfa54 100644
--- a/linkhash.h
+++ b/linkhash.h
@@ -16,8 +16,8 @@
  *        this is exposed by the json_object_get_object() function and within the
  *        json_object_iter type, it is not recommended for direct use.
  */
-#ifndef _linkhash_h_
-#define _linkhash_h_
+#ifndef _json_c_linkhash_h_
+#define _json_c_linkhash_h_
 
 #include "json_object.h"
 
diff --git a/printbuf.h b/printbuf.h
index bfcbd2b..9b33802 100644
--- a/printbuf.h
+++ b/printbuf.h
@@ -20,11 +20,11 @@
  *        json_object_set_serializer() direct use of this is not
  *        recommended.
  */
-#ifndef _printbuf_h_
-#define _printbuf_h_
+#ifndef _json_c_printbuf_h_
+#define _json_c_printbuf_h_
 
 #ifndef JSON_EXPORT
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && defined(JSON_C_DLL)
 #define JSON_EXPORT __declspec(dllexport)
 #else
 #define JSON_EXPORT extern
diff --git a/random_seed.c b/random_seed.c
index 17727c6..f474e39 100644
--- a/random_seed.c
+++ b/random_seed.c
@@ -13,9 +13,23 @@
 #include "config.h"
 #include "strerror_override.h"
 #include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_BSD_STDLIB_H
+#include <bsd/stdlib.h>
+#endif
 
 #define DEBUG_SEED(s)
 
+#if defined(__APPLE__) || defined(__unix__) || defined(__linux__)
+#define HAVE_DEV_RANDOM 1
+#endif
+
+#ifdef HAVE_ARC4RANDOM
+#undef HAVE_GETRANDOM
+#undef HAVE_DEV_RANDOM
+#undef HAVE_CRYPTGENRANDOM
+#endif
+
 #if defined ENABLE_RDRAND
 
 /* cpuid */
@@ -162,36 +176,38 @@ retry:
 #include <sys/random.h>
 #endif
 
-static int get_getrandom_seed(void)
+static int get_getrandom_seed(int *seed)
 {
-	DEBUG_SEED("get_dev_random_seed");
+	DEBUG_SEED("get_getrandom_seed");
 
-	int r;
 	ssize_t ret;
 
-	do {
-		ret = getrandom(&r, sizeof(r), 0);
+	do
+	{
+		ret = getrandom(seed, sizeof(*seed), GRND_NONBLOCK);
 	} while ((ret == -1) && (errno == EINTR));
 
 	if (ret == -1)
 	{
 		if (errno == ENOSYS) /* syscall not available in kernel */
 			return -1;
+		if (errno == EAGAIN) /* entropy not yet initialized */
+			return -1;
 
 		fprintf(stderr, "error from getrandom(): %s", strerror(errno));
-		exit(1);
+		return -1;
 	}
 
-	if (ret != sizeof(r))
+	if (ret != sizeof(*seed))
 		return -1;
 
-	return r;
+	return 0;
 }
 #endif /* defined HAVE_GETRANDOM */
 
-/* has_dev_urandom */
+/* get_dev_random_seed */
 
-#if defined(__APPLE__) || defined(__unix__) || defined(__linux__)
+#ifdef HAVE_DEV_RANDOM
 
 #include <fcntl.h>
 #include <string.h>
@@ -201,43 +217,34 @@ static int get_getrandom_seed(void)
 #include <stdlib.h>
 #include <sys/stat.h>
 
-#define HAVE_DEV_RANDOM 1
-
 static const char *dev_random_file = "/dev/urandom";
 
-static int has_dev_urandom(void)
+static int get_dev_random_seed(int *seed)
 {
+	DEBUG_SEED("get_dev_random_seed");
+
 	struct stat buf;
 	if (stat(dev_random_file, &buf))
-	{
-		return 0;
-	}
-	return ((buf.st_mode & S_IFCHR) != 0);
-}
-
-/* get_dev_random_seed */
-
-static int get_dev_random_seed(void)
-{
-	DEBUG_SEED("get_dev_random_seed");
+		return -1;
+	if ((buf.st_mode & S_IFCHR) == 0)
+		return -1;
 
 	int fd = open(dev_random_file, O_RDONLY);
 	if (fd < 0)
 	{
 		fprintf(stderr, "error opening %s: %s", dev_random_file, strerror(errno));
-		exit(1);
+		return -1;
 	}
 
-	int r;
-	ssize_t nread = read(fd, &r, sizeof(r));
-	if (nread != sizeof(r))
+	ssize_t nread = read(fd, seed, sizeof(*seed));
+	if (nread != sizeof(*seed))
 	{
 		fprintf(stderr, "error short read %s: %s", dev_random_file, strerror(errno));
-		exit(1);
+		return -1;
 	}
 
 	close(fd);
-	return r;
+	return 0;
 }
 
 #endif
@@ -260,13 +267,10 @@ static int get_dev_random_seed(void)
 #pragma comment(lib, "advapi32.lib")
 #endif
 
-static int get_time_seed(void);
-
-static int get_cryptgenrandom_seed(void)
+static int get_cryptgenrandom_seed(int *seed)
 {
 	HCRYPTPROV hProvider = 0;
 	DWORD dwFlags = CRYPT_VERIFYCONTEXT;
-	int r;
 
 	DEBUG_SEED("get_cryptgenrandom_seed");
 
@@ -277,34 +281,36 @@ static int get_cryptgenrandom_seed(void)
 	if (!CryptAcquireContextA(&hProvider, 0, 0, PROV_RSA_FULL, dwFlags))
 	{
 		fprintf(stderr, "error CryptAcquireContextA 0x%08lx", GetLastError());
-		r = get_time_seed();
+		return -1;
 	}
 	else
 	{
-		BOOL ret = CryptGenRandom(hProvider, sizeof(r), (BYTE*)&r);
+		BOOL ret = CryptGenRandom(hProvider, sizeof(*seed), (BYTE *)seed);
 		CryptReleaseContext(hProvider, 0);
 		if (!ret)
 		{
 			fprintf(stderr, "error CryptGenRandom 0x%08lx", GetLastError());
-			r = get_time_seed();
+			return -1;
 		}
 	}
 
-	return r;
+	return 0;
 }
 
 #endif
 
 /* get_time_seed */
 
+#ifndef HAVE_ARC4RANDOM
 #include <time.h>
 
 static int get_time_seed(void)
 {
 	DEBUG_SEED("get_time_seed");
 
-	return (int)time(NULL) * 433494437;
+	return (unsigned)time(NULL) * 433494437;
 }
+#endif
 
 /* json_c_get_random_seed */
 
@@ -317,19 +323,31 @@ int json_c_get_random_seed(void)
 	if (has_rdrand())
 		return get_rdrand_seed();
 #endif
+#ifdef HAVE_ARC4RANDOM
+	/* arc4random never fails, so use it if it's available */
+	return arc4random();
+#else
 #ifdef HAVE_GETRANDOM
 	{
-		int seed = get_getrandom_seed();
-		if (seed != -1)
+		int seed;
+		if (get_getrandom_seed(&seed) == 0)
 			return seed;
 	}
 #endif
 #if defined HAVE_DEV_RANDOM && HAVE_DEV_RANDOM
-	if (has_dev_urandom())
-		return get_dev_random_seed();
+	{
+		int seed;
+		if (get_dev_random_seed(&seed) == 0)
+			return seed;
+	}
 #endif
 #if defined HAVE_CRYPTGENRANDOM && HAVE_CRYPTGENRANDOM
-	return get_cryptgenrandom_seed();
+	{
+		int seed;
+		if (get_cryptgenrandom_seed(&seed) == 0)
+			return seed;
+	}
 #endif
 	return get_time_seed();
+#endif /* !HAVE_ARC4RANDOM */
 }
diff --git a/strerror_override.c b/strerror_override.c
index 7a262f7..a3dd377 100644
--- a/strerror_override.c
+++ b/strerror_override.c
@@ -94,7 +94,7 @@ char *_json_c_strerror(int errno_in)
 	}
 
 	// It's not one of the known errno values, return the numeric value.
-	for (ii = 0; errno_in > 10; errno_in /= 10, ii++)
+	for (ii = 0; errno_in >= 10; errno_in /= 10, ii++)
 	{
 		digbuf[ii] = "0123456789"[(errno_in % 10)];
 	}
@@ -105,5 +105,6 @@ char *_json_c_strerror(int errno_in)
 	{
 		errno_buf[start_idx] = digbuf[ii];
 	}
+	errno_buf[start_idx] = '\0';
 	return errno_buf;
 }
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 125f615..d7abf51 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -12,32 +12,38 @@ target_link_libraries(test2Formatted PRIVATE ${PROJECT_NAME})
 
 include_directories(PUBLIC ${CMAKE_SOURCE_DIR})
 
-foreach(TESTNAME
-	test1
-	test2
-	test4
-	testReplaceExisting
-	test_cast
-	test_charcase
-	test_compare
-	test_deep_copy
-	test_double_serializer
-	test_float
-	test_int_add
-	test_json_pointer
-	test_locale
-	test_null
-	test_parse
-	test_parse_int64
-	test_printbuf
-	test_set_serializer
-	test_set_value
-	test_util_file
-	test_visit
-	test_object_iterator)
+set(ALL_TEST_NAMES
+    test1
+    test2
+    test4
+    testReplaceExisting
+    test_cast
+    test_charcase
+    test_compare
+    test_deep_copy
+    test_double_serializer
+    test_float
+    test_int_add
+    test_locale
+    test_null
+    test_parse
+    test_parse_int64
+    test_printbuf
+    test_set_serializer
+    test_set_value
+    test_strerror
+    test_util_file
+    test_visit
+    test_object_iterator)
+
+if (NOT DISABLE_JSON_POINTER)
+    set(ALL_TEST_NAMES ${ALL_TEST_NAMES} test_json_pointer)
+endif()
+
+foreach(TESTNAME ${ALL_TEST_NAMES})
 
 add_executable(${TESTNAME} ${TESTNAME}.c)
-if(${TESTNAME} STREQUAL test_util_file)
+if(${TESTNAME} STREQUAL test_strerror OR ${TESTNAME} STREQUAL test_util_file)
 # For output consistency, we need _json_c_strerror() in some tests:
 target_sources(${TESTNAME} PRIVATE ../strerror_override.c)
 endif()
diff --git a/tests/test1.c b/tests/test1.c
index 6682120..4d29601 100644
--- a/tests/test1.c
+++ b/tests/test1.c
@@ -1,9 +1,12 @@
 #include <assert.h>
+#include <limits.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "config.h"
+
 #include "json.h"
 #include "parse_flags.h"
 
@@ -307,6 +310,27 @@ int main(int argc, char **argv)
 	}
 	printf("my_object.to_string()=%s\n", json_object_to_json_string(my_object));
 
+	json_object_put(my_array);
+	my_array = json_object_new_array_ext(INT_MIN + 1);
+	if (my_array != NULL)
+	{
+		printf("ERROR: able to allocate an array of negative size!\n");
+		fflush(stdout);
+		json_object_put(my_array);
+		my_array = NULL;
+	}
+
+#if SIZEOF_SIZE_T == SIZEOF_INT
+	my_array = json_object_new_array_ext(INT_MAX / 2 + 2);
+	if (my_array != NULL)
+	{
+		printf("ERROR: able to allocate an array of insufficient size!\n");
+		fflush(stdout);
+		json_object_put(my_array);
+		my_array = NULL;
+	}
+#endif
+
 	json_object_put(my_string);
 	json_object_put(my_int);
 	json_object_put(my_null);
diff --git a/tests/test_cast.c b/tests/test_cast.c
index fb63e0d..fc769f5 100644
--- a/tests/test_cast.c
+++ b/tests/test_cast.c
@@ -28,6 +28,11 @@ int main(int argc, char **argv)
 		\"int64_number\": 2147483649,\n\
 		\"negative_number\": -321321321,\n\
 		\"a_null\": null,\n\
+		\"empty_array\": [],\n\
+		\"nonempty_array\": [ 123 ],\n\
+		\"array_with_zero\": [ 0 ],\n\
+		\"empty_object\": {},\n\
+		\"nonempty_object\": { \"a\": 123 },\n\
 	}";
 	/* Note: 2147483649 = INT_MAX + 2 */
 	/* Note: 9223372036854775809 = INT64_MAX + 2 */
@@ -49,6 +54,11 @@ int main(int argc, char **argv)
 	getit(new_obj, "int64_number");
 	getit(new_obj, "negative_number");
 	getit(new_obj, "a_null");
+	getit(new_obj, "empty_array");
+	getit(new_obj, "nonempty_array");
+	getit(new_obj, "array_with_zero");
+	getit(new_obj, "empty_object");
+	getit(new_obj, "nonempty_object");
 
 	// Now check the behaviour of the json_object_is_type() function.
 	printf("\n================================\n");
diff --git a/tests/test_cast.expected b/tests/test_cast.expected
index 347d540..6a19de9 100644
--- a/tests/test_cast.expected
+++ b/tests/test_cast.expected
@@ -7,6 +7,11 @@ Parsed input: {
 		"int64_number": 2147483649,
 		"negative_number": -321321321,
 		"a_null": null,
+		"empty_array": [],
+		"nonempty_array": [ 123 ],
+		"array_with_zero": [ 0 ],
+		"empty_object": {},
+		"nonempty_object": { "a": 123 },
 	}
 Result is not NULL
 new_obj.string_of_digits json_object_get_type()=string
@@ -57,6 +62,36 @@ new_obj.a_null json_object_get_int64()=0
 new_obj.a_null json_object_get_uint64()=0
 new_obj.a_null json_object_get_boolean()=0
 new_obj.a_null json_object_get_double()=0.000000
+new_obj.empty_array json_object_get_type()=array
+new_obj.empty_array json_object_get_int()=0
+new_obj.empty_array json_object_get_int64()=0
+new_obj.empty_array json_object_get_uint64()=0
+new_obj.empty_array json_object_get_boolean()=0
+new_obj.empty_array json_object_get_double()=0.000000
+new_obj.nonempty_array json_object_get_type()=array
+new_obj.nonempty_array json_object_get_int()=0
+new_obj.nonempty_array json_object_get_int64()=0
+new_obj.nonempty_array json_object_get_uint64()=0
+new_obj.nonempty_array json_object_get_boolean()=0
+new_obj.nonempty_array json_object_get_double()=0.000000
+new_obj.array_with_zero json_object_get_type()=array
+new_obj.array_with_zero json_object_get_int()=0
+new_obj.array_with_zero json_object_get_int64()=0
+new_obj.array_with_zero json_object_get_uint64()=0
+new_obj.array_with_zero json_object_get_boolean()=0
+new_obj.array_with_zero json_object_get_double()=0.000000
+new_obj.empty_object json_object_get_type()=object
+new_obj.empty_object json_object_get_int()=0
+new_obj.empty_object json_object_get_int64()=0
+new_obj.empty_object json_object_get_uint64()=0
+new_obj.empty_object json_object_get_boolean()=0
+new_obj.empty_object json_object_get_double()=0.000000
+new_obj.nonempty_object json_object_get_type()=object
+new_obj.nonempty_object json_object_get_int()=0
+new_obj.nonempty_object json_object_get_int64()=0
+new_obj.nonempty_object json_object_get_uint64()=0
+new_obj.nonempty_object json_object_get_boolean()=0
+new_obj.nonempty_object json_object_get_double()=0.000000
 
 ================================
 json_object_is_type: null,boolean,double,int,object,array,string
diff --git a/tests/test_strerror.c b/tests/test_strerror.c
new file mode 100644
index 0000000..1780564
--- /dev/null
+++ b/tests/test_strerror.c
@@ -0,0 +1,11 @@
+#include "strerror_override.h"
+#include "strerror_override_private.h"
+
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+	puts(strerror(10000));
+	puts(strerror(999));
+	return 0;
+}
diff --git a/tests/test_strerror.expected b/tests/test_strerror.expected
new file mode 100644
index 0000000..b6b3bb6
--- /dev/null
+++ b/tests/test_strerror.expected
@@ -0,0 +1,2 @@
+ERRNO=10000
+ERRNO=999
diff --git a/tests/test_strerror.test b/tests/test_strerror.test
new file mode 120000
index 0000000..58a13f4
--- /dev/null
+++ b/tests/test_strerror.test
@@ -0,0 +1 @@
+test_basic.test
\ No newline at end of file