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diff --git a/vendor/voclient/include/xmlrpc-c/util.h b/vendor/voclient/include/xmlrpc-c/util.h
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+/*=============================================================================
+                                 xmlrpc-c/util.h
+===============================================================================
+
+  This is the interface to the libxmlrpc_util library, which contains
+  utility routines that have nothing to do with XML-RPC.  The library
+  exists because other Xmlrpc-c libraries use the utilities.
+
+  By Bryan Henderson, San Jose, CA 05.09.21.
+
+  Contributed to the public domain by its author.
+=============================================================================*/
+
+#ifndef XMLRPC_C_UTIL_H_INCLUDED
+#define XMLRPC_C_UTIL_H_INCLUDED
+
+#include <sys/types.h>
+#include <stdarg.h>
+
+#include <xmlrpc-c/config.h>  /* Defines XMLRPC_HAVE_WCHAR */
+#include <xmlrpc-c/c_util.h>  /* for GNU_PRINTF_ATTR */
+
+#if XMLRPC_HAVE_WCHAR
+#include <wchar.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*=========================================================================
+**  C struct size computations
+**=======================================================================*/
+
+/* Use XMLRPC_STRUCT_MEMBER_SIZE() to determine how big a structure is
+   up to and including a specified member.  E.g. if you have
+   struct mystruct {int red; int green; int blue};, then
+   XMLRPC_STRUCT_MEMBER_SIZE(mystruct, green) is (8).
+*/
+
+#define _XMLRPC_STRUCT_MEMBER_OFFSET(TYPE, MBRNAME) \
+  ((size_t)(char*)&((TYPE *)0)->MBRNAME)
+#define _XMLRPC_STRUCT_MEMBER_SIZE(TYPE, MBRNAME) \
+  sizeof(((TYPE *)0)->MBRNAME)
+#define XMLRPC_STRUCTSIZE(TYPE, MBRNAME) \
+  (_XMLRPC_STRUCT_MEMBER_OFFSET(TYPE, MBRNAME) + \
+  _XMLRPC_STRUCT_MEMBER_SIZE(TYPE, MBRNAME))
+
+/*=========================================================================
+**  Assertions and Debugging
+**=========================================================================
+**  Note that an assertion is _not_ a directive to check a condition and
+**  crash if it isn't true.  It is an assertion that the condition _is_
+**  true.  This assertion helps people to read the code.  The program
+**  may also check the assertion as it runs, and if it conflicts with reality,
+**  recognize that the program is incorrect and abort it.  In practice,
+**  it does this checking when the program was compiled without the NDEBUG
+**  macro defined.
+*/
+
+#ifndef NDEBUG
+
+#define XMLRPC_ASSERT(cond) \
+    do \
+        if (!(cond)) \
+            xmlrpc_assertion_failed(__FILE__, __LINE__); \
+    while (0)
+
+#else
+#define XMLRPC_ASSERT(cond) while (0) {}
+#endif
+
+void
+xmlrpc_assertion_failed(const char * const fileName,
+                        int          const lineNumber);
+
+/* Validate a pointer. */
+#define XMLRPC_ASSERT_PTR_OK(ptr) \
+    XMLRPC_ASSERT((ptr) != NULL)
+
+
+/*=========================================================================
+**  xmlrpc_env
+**=========================================================================
+**  XML-RPC represents runtime errors as <fault> elements. These contain
+**  <faultCode> and <faultString> elements.
+**
+**  Since we need as much thread-safety as possible, we borrow an idea from
+**  CORBA--we store exception information in an "environment" object.
+**  You'll pass this to many different functions, and it will get filled
+**  out appropriately.
+**
+**  For example:
+**
+**    xmlrpc_env env;
+**
+**    xmlrpc_env_init(&env);
+**
+**    xmlrpc_do_something(&env);
+**    if (env.fault_occurred)
+**        report_error_appropriately();
+**
+**    xmlrpc_env_clean(&env);
+*/
+
+#define XMLRPC_INTERNAL_ERROR               (-500)
+#define XMLRPC_TYPE_ERROR                   (-501)
+#define XMLRPC_INDEX_ERROR                  (-502)
+#define XMLRPC_PARSE_ERROR                  (-503)
+#define XMLRPC_NETWORK_ERROR                (-504)
+#define XMLRPC_TIMEOUT_ERROR                (-505)
+#define XMLRPC_NO_SUCH_METHOD_ERROR         (-506)
+#define XMLRPC_REQUEST_REFUSED_ERROR        (-507)
+#define XMLRPC_INTROSPECTION_DISABLED_ERROR (-508)
+#define XMLRPC_LIMIT_EXCEEDED_ERROR         (-509)
+#define XMLRPC_INVALID_UTF8_ERROR           (-510)
+
+typedef struct _xmlrpc_env {
+    int    fault_occurred;
+    int    fault_code;
+    char * fault_string;
+} xmlrpc_env;
+
+/* Initialize and destroy the contents of the provided xmlrpc_env object.
+** These functions will never fail. */
+void xmlrpc_env_init (xmlrpc_env* env);
+void xmlrpc_env_clean (xmlrpc_env* const env);
+
+/* Fill out an xmlrpc_fault with the specified values, and set the
+** fault_occurred flag. This function will make a private copy of 'string',
+** so you retain responsibility for your copy. */
+void 
+xmlrpc_env_set_fault(xmlrpc_env * const env, 
+                     int          const faultCode, 
+                     const char * const faultDescription);
+
+/* The same as the above, but using varargs */
+void
+xmlrpc_set_fault_formatted_v(xmlrpc_env * const envP,
+                             int          const code,
+                             const char * const format,
+                             va_list      const args);
+
+/* The same as the above, but using a printf-style format string. */
+void 
+xmlrpc_env_set_fault_formatted(xmlrpc_env * const envP, 
+                               int          const code,
+                               const char * const format, 
+                               ...) GNU_PRINTF_ATTR(3,4);
+
+/* This one infers XMLRPC_INTERNAL_ERROR and has a shorter name.
+   So a call takes up less source code space.
+*/
+void
+xmlrpc_faultf(xmlrpc_env * const envP,
+              const char * const format,
+              ...) GNU_PRINTF_ATTR(2,3);
+
+/* A simple debugging assertion. */
+#define XMLRPC_ASSERT_ENV_OK(envP) \
+    XMLRPC_ASSERT((envP) != NULL && \
+    (envP->fault_string == NULL) && \
+    !(envP)->fault_occurred)
+
+/* This version must *not* interpret 'str' as a format string, to avoid
+** several evil attacks. */
+#define XMLRPC_FAIL(env,code,str) \
+    do { xmlrpc_env_set_fault((env),(code),(str)); goto cleanup; } while (0)
+
+#define XMLRPC_FAIL1(env,code,str,arg1) \
+    do { \
+        xmlrpc_env_set_fault_formatted((env),(code),(str),(arg1)); \
+        goto cleanup; \
+    } while (0)
+
+#define XMLRPC_FAIL2(env,code,str,arg1,arg2) \
+    do { \
+        xmlrpc_env_set_fault_formatted((env),(code),(str),(arg1),(arg2)); \
+        goto cleanup; \
+    } while (0)
+
+#define XMLRPC_FAIL3(env,code,str,arg1,arg2,arg3) \
+    do { \
+        xmlrpc_env_set_fault_formatted((env),(code), \
+                                       (str),(arg1),(arg2),(arg3)); \
+        goto cleanup; \
+    } while (0)
+
+#if !defined(__cplusplus)
+#if defined(__GNUC__)
+#define XMLRPC_FAILF( env, code, fmt, ... )  \
+    do {  \
+        xmlrpc_env_set_fault_formatted((env), (code), (fmt),  \
+                                       ##__VA_ARGS__ );  \
+        goto cleanup;  \
+    } while (0)
+#endif
+#endif
+
+#define XMLRPC_FAIL_IF_NULL(ptr,env,code,str) \
+    do { \
+        if ((ptr) == NULL) \
+            XMLRPC_FAIL((env),(code),(str)); \
+    } while (0)
+
+#define XMLRPC_FAIL_IF_FAULT(env) \
+    do { if ((env)->fault_occurred) goto cleanup; } while (0)
+
+
+/*=========================================================================
+**  xmlrpc_mem_block
+**=========================================================================
+**  A resizable chunk of memory. This is mostly used internally, but it is
+**  also used by the public API in a few places.
+**  The struct fields are private!
+*/
+
+typedef struct _xmlrpc_mem_block {
+    size_t _size;
+    size_t _allocated;
+    void*  _block;
+} xmlrpc_mem_block;
+
+/* Allocate a new xmlrpc_mem_block. */
+xmlrpc_mem_block* xmlrpc_mem_block_new (xmlrpc_env* const env, size_t const size);
+
+/* Destroy an existing xmlrpc_mem_block, and everything it contains. */
+void xmlrpc_mem_block_free (xmlrpc_mem_block* const block);
+
+/* Initialize the contents of the provided xmlrpc_mem_block. */
+void xmlrpc_mem_block_init
+    (xmlrpc_env* const env, xmlrpc_mem_block* const block, size_t const size);
+
+/* Deallocate the contents of the provided xmlrpc_mem_block, but not the
+** block itself. */
+void xmlrpc_mem_block_clean (xmlrpc_mem_block* const block);
+
+/* Get the size and contents of the xmlrpc_mem_block. */
+size_t 
+xmlrpc_mem_block_size(const xmlrpc_mem_block * const block);
+
+void * 
+xmlrpc_mem_block_contents(const xmlrpc_mem_block * const block);
+
+/* Resize an xmlrpc_mem_block, preserving as much of the contents as
+** possible. */
+void xmlrpc_mem_block_resize
+    (xmlrpc_env* const env, xmlrpc_mem_block* const block, size_t const size);
+
+/* Append data to an existing xmlrpc_mem_block. */
+void xmlrpc_mem_block_append
+    (xmlrpc_env* const env, xmlrpc_mem_block* const block, const void * const data, size_t const len);
+
+#define XMLRPC_MEMBLOCK_NEW(type,env,size) \
+    xmlrpc_mem_block_new((env), sizeof(type) * (size))
+#define XMLRPC_MEMBLOCK_FREE(type,block) \
+    xmlrpc_mem_block_free(block)
+#define XMLRPC_MEMBLOCK_INIT(type,env,block,size) \
+    xmlrpc_mem_block_init((env), (block), sizeof(type) * (size))
+#define XMLRPC_MEMBLOCK_CLEAN(type,block) \
+    xmlrpc_mem_block_clean(block)
+#define XMLRPC_MEMBLOCK_SIZE(type,block) \
+    (xmlrpc_mem_block_size(block) / sizeof(type))
+#define XMLRPC_MEMBLOCK_CONTENTS(type,block) \
+    ((type*) xmlrpc_mem_block_contents(block))
+#define XMLRPC_MEMBLOCK_RESIZE(type,env,block,size) \
+    xmlrpc_mem_block_resize(env, block, sizeof(type) * (size))
+#define XMLRPC_MEMBLOCK_APPEND(type,env,block,data,size) \
+    xmlrpc_mem_block_append(env, block, data, sizeof(type) * (size))
+
+/* Here are some backward compatibility definitions.  These longer names
+   used to be the only ones and typed memory blocks were considered
+   special.
+*/
+#define XMLRPC_TYPED_MEM_BLOCK_NEW(type,env,size) \
+    XMLRPC_MEMBLOCK_NEW(type,env,size)
+#define XMLRPC_TYPED_MEM_BLOCK_FREE(type,block) \
+    XMLRPC_MEMBLOCK_FREE(type,block)
+#define XMLRPC_TYPED_MEM_BLOCK_INIT(type,env,block,size) \
+    XMLRPC_MEMBLOCK_INIT(type,env,block,size)
+#define XMLRPC_TYPED_MEM_BLOCK_CLEAN(type,block) \
+    XMLRPC_MEMBLOCK_CLEAN(type,block)
+#define XMLRPC_TYPED_MEM_BLOCK_SIZE(type,block) \
+    XMLRPC_MEMBLOCK_SIZE(type,block)
+#define XMLRPC_TYPED_MEM_BLOCK_CONTENTS(type,block) \
+    XMLRPC_MEMBLOCK_CONTENTS(type,block)
+#define XMLRPC_TYPED_MEM_BLOCK_RESIZE(type,env,block,size) \
+    XMLRPC_MEMBLOCK_RESIZE(type,env,block,size)
+#define XMLRPC_TYPED_MEM_BLOCK_APPEND(type,env,block,data,size) \
+    XMLRPC_MEMBLOCK_APPEND(type,env,block,data,size)
+
+
+/*=========================================================================
+**  UTF-8 Encoding and Decoding
+**=======================================================================*/
+
+void 
+xmlrpc_validate_utf8(xmlrpc_env * const envP,
+                     const char * const utf8Data,
+                     size_t       const utf8Len);
+
+/* Decode a UTF-8 string. */
+xmlrpc_mem_block *
+xmlrpc_utf8_to_wcs(xmlrpc_env * const envP,
+                   const char * const utf8_data,
+                   size_t       const utf8_len);
+
+/* Encode a UTF-8 string. */
+
+#if XMLRPC_HAVE_WCHAR
+xmlrpc_mem_block *
+xmlrpc_wcs_to_utf8(xmlrpc_env *    const envP,
+                   const wchar_t * const wcsData,
+                   size_t          const wcsLen);
+#endif
+
+void
+xmlrpc_force_to_utf8(char * const buffer);
+
+void
+xmlrpc_force_to_xml_chars(char * const buffer);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif