add switch_core_session_sprintf which allocates from the session pool

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4319 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_core.h

@@ -393,6 +393,15 @@ SWITCH_DECLARE(char *) switch_core_session_strdup(switch_core_session_t *session
 */
 SWITCH_DECLARE(char *) switch_core_strdup(switch_memory_pool_t *pool, const char *todup);
 
+/*!
+  \brief printf-style style printing routine.  The data is output to a string allocated from the session
+  \param session a session to use for allocation
+  \param fmt The format of the string
+  \param ... The arguments to use while printing the data
+  \return The new string
+*/
+SWITCH_DECLARE(char *) switch_core_session_sprintf(switch_core_session_t *session, const char *fmt, ...);
+
 /*! 
   \brief Retrieve the memory pool from a session
   \param session the session to retrieve the pool from

src/switch_core.c

@@ -1465,6 +1465,22 @@ SWITCH_DECLARE(char *) switch_core_permanent_strdup(const char *todup)
 	return duped;
 }
 
+SWITCH_DECLARE(char *) switch_core_session_sprintf(switch_core_session_t *session, const char *fmt, ...)
+{
+	va_list ap;
+	char *result = NULL;
+
+	assert(session != NULL);
+	assert(session->pool != NULL);
+	va_start(ap, fmt);
+	
+	result = apr_pvsprintf(session->pool ,fmt, ap);
+
+	va_end(ap);
+
+	return result;
+}
+
 
 SWITCH_DECLARE(char *) switch_core_session_strdup(switch_core_session_t *session, const char *todup)
 {