Add support for OpenStep plist format

docs/plistutil.1

@@ -18,13 +18,17 @@ filename, plistutil will read from stdin.
 Output FILE to convert to. If this argument is omitted or - is passed as
 filename, plistutil will write to stdout.
 .TP
-.B \-f, \-\-format [bin|xml|json]
+.B \-f, \-\-format [bin|xml|json|openstep]
 Force output format, regardless of input type. This is useful if the input
 format is not known, but the output format should always be in a specific
 format (like xml or json).
 
 If omitted, XML plist data will be converted to binary and vice-versa. To
-convert to/from JSON the output format needs to specified.
+convert to/from JSON or OpenStep the output format needs to specified.
+.TP
+.B \-c, \-\-compact
+JSON and OpenStep only: Print output in compact form. By default, the output
+will be pretty-printed.
 .TP
 .B \-h, \-\-help
 Prints usage information.

include/plist/plist.h

@@ -697,6 +697,20 @@ extern "C"
      */
     plist_err_t plist_to_json(plist_t plist, char **plist_json, uint32_t* length, int prettify);
 
+    /**
+     * Export the #plist_t structure to OpenStep format.
+     *
+     * @param plist the root node to export
+     * @param plist_openstep a pointer to a char* buffer. This function allocates the memory,
+     *     caller is responsible for freeing it.
+     * @param length a pointer to an uint32_t variable. Represents the length of the allocated buffer.
+     * @param prettify pretty print the output if != 0
+     * @return PLIST_ERR_SUCCESS on success or a #plist_err_t on failure
+     * @note Use plist_mem_free() to free the allocated memory.
+     */
+    plist_err_t plist_to_openstep(plist_t plist, char **plist_openstep, uint32_t* length, int prettify);
+
+
     /**
      * Import the #plist_t structure from XML format.
      *
@@ -727,6 +741,16 @@ extern "C"
      */
     plist_err_t plist_from_json(const char *json, uint32_t length, plist_t * plist);
 
+    /**
+     * Import the #plist_t structure from OpenStep plist format.
+     *
+     * @param openstep a pointer to the OpenStep plist buffer.
+     * @param length length of the buffer to read.
+     * @param plist a pointer to the imported plist.
+     * @return PLIST_ERR_SUCCESS on success or a #plist_err_t on failure
+     */
+    plist_err_t plist_from_openstep(const char *openstep, uint32_t length, plist_t * plist);
+
     /**
      * Import the #plist_t structure from memory data.
      * This method will look at the first bytes of plist_data

src/Makefile.am

@@ -24,6 +24,7 @@ libplist_2_0_la_SOURCES = \
 	bplist.c \
 	jsmn.c jsmn.h \
 	jplist.c \
+	oplist.c \
 	plist.c plist.h
 
 libplist___2_0_la_LIBADD = libplist-2.0.la