/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape security libraries.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */
#include "nspr.h"

struct tuple_str {
    PRErrorCode	 errNum;
    const char * errString;
};

typedef struct tuple_str tuple_str;

#define ER2(a,b)   {a, b},
#define ER3(a,b,c) {a, c},

#include "secerr.h"
#include "sslerr.h"

const tuple_str errStrings[] = {

/* keep this list in asceding order of error numbers */
#include "SSLerrs.h"
#include "SECerrs.h"
#include "NSPRerrs.h"

};

const PRInt32 numStrings = sizeof(errStrings) / sizeof(tuple_str);

/* Returns a UTF-8 encoded constant error string for "errNum".
 * Returns NULL of errNum is unknown.
 */
const char *
SECU_Strerror(PRErrorCode errNum) {
    PRInt32 low  = 0;
    PRInt32 high = numStrings - 1;
    PRInt32 i;
    PRErrorCode num;
    static int initDone;

    /* make sure table is in ascending order.
     * binary search depends on it.
     */
    if (!initDone) {
	PRErrorCode lastNum = ((PRInt32)0x80000000);
    	for (i = low; i <= high; ++i) {
	    num = errStrings[i].errNum;
	    if (num <= lastNum) {
	    	fprintf(stderr, 
"sequence error in error strings at item %d\n"
"error %d (%s)\n"
"should come after \n"
"error %d (%s)\n",
		        i, lastNum, errStrings[i-1].errString, 
			num, errStrings[i].errString);
	    }
	    lastNum = num;
	}
	initDone = 1;
    }

    /* Do binary search of table. */
    while (low + 1 < high) {
    	i = (low + high) / 2;
	num = errStrings[i].errNum;
	if (errNum == num) 
	    return errStrings[i].errString;
        if (errNum < num)
	    high = i;
	else 
	    low = i;
    }
    if (errNum == errStrings[low].errNum)
    	return errStrings[low].errString;
    if (errNum == errStrings[high].errNum)
    	return errStrings[high].errString;
    return NULL;
}