Started errno framework in pjlib-util

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@217 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 112 insertions, 0 deletions

diff --git a/pjlib-util/src/pjlib-util/errno.c b/pjlib-util/src/pjlib-util/errno.c
new file mode 100644
index 00000000..5384aab2
--- /dev/null
+++ b/pjlib-util/src/pjlib-util/errno.c
@@ -0,0 +1,112 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjlib-util/errno.h>
+#include <pj/string.h>
+
+
+
+/* PJLIB_UTIL's own error codes/messages 
+ * MUST KEEP THIS ARRAY SORTED!!
+ * Message must be limited to 64 chars!
+ */
+static const struct 
+{
+    int code;
+    const char *msg;
+} err_str[] = 
+{
+    /* STUN errors */
+    { PJLIB_UTIL_ESTUNRESOLVE,	    "Unable to resolve STUN server" },
+    { PJLIB_UTIL_ESTUNINMSGTYPE,    "Unknown STUN message type" },
+    { PJLIB_UTIL_ESTUNINMSGLEN,	    "Invalid STUN message length" },
+    { PJLIB_UTIL_ESTUNINATTRLEN,    "STUN attribute length error" },
+    { PJLIB_UTIL_ESTUNINATTRTYPE,   "Invalid STUN attribute type" },
+    { PJLIB_UTIL_ESTUNININDEX,	    "Invalid STUN server/socket index" },
+    { PJLIB_UTIL_ESTUNNOBINDRES,    "No STUN binding response in the message" },
+    { PJLIB_UTIL_ESTUNRECVERRATTR,  "Received STUN error attribute" },
+    { PJLIB_UTIL_ESTUNNOMAP,	    "No STUN mapped address attribute" },
+    { PJLIB_UTIL_ESTUNNOTRESPOND,   "Received no response from STUN server" },
+    { PJLIB_UTIL_ESTUNSYMMETRIC,    "Symetric NAT detected by STUN" },
+
+};
+
+
+
+/*
+ * pjlib_util_strerror()
+ */
+PJ_DEF(pj_str_t) pjlib_util_strerror( pj_status_t statcode, 
+				      char *buf, pj_size_t bufsize )
+{
+    pj_str_t errstr;
+
+    if (statcode >= PJLIB_UTIL_ERRNO_START && 
+	statcode < PJLIB_UTIL_ERRNO_START + PJ_ERRNO_SPACE_SIZE)
+    {
+	/* Find the error in the table.
+	 * Use binary search!
+	 */
+	int first = 0;
+	int n = PJ_ARRAY_SIZE(err_str);
+
+	while (n > 0) {
+	    int half = n/2;
+	    int mid = first + half;
+
+	    if (err_str[mid].code < statcode) {
+		first = mid+1;
+		n -= (half+1);
+	    } else if (err_str[mid].code > statcode) {
+		n = half;
+	    } else {
+		first = mid;
+		break;
+	    }
+	}
+
+
+	if (PJ_ARRAY_SIZE(err_str) && err_str[first].code == statcode) {
+	    pj_str_t msg;
+	    
+	    msg.ptr = (char*)err_str[first].msg;
+	    msg.slen = pj_ansi_strlen(err_str[first].msg);
+
+	    errstr.ptr = buf;
+	    pj_strncpy_with_null(&errstr, &msg, bufsize);
+	    return errstr;
+
+	} 
+    }
+
+    /* Error not found. */
+    errstr.ptr = buf;
+    errstr.slen = pj_snprintf(buf, bufsize, 
+			      "Unknown error %d",
+			      statcode);
+
+    return errstr;
+}
+
+
+PJ_DEF(pj_status_t) pjlib_util_init(void)
+{
+    return pj_register_strerror(PJLIB_UTIL_ERRNO_START, 
+				PJ_ERRNO_SPACE_SIZE, 
+				&pjlib_util_strerror);
+}