/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s):
 *   John Bandhauer <jband@netscape.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (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 NPL, 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 NPL or the GPL.
 */

/* Debug Logging support. */

#include "xpcprivate.h"

// this all only works for DEBUG...
#ifdef DEBUG

#define SPACE_COUNT     200
#define LINE_LEN        200
#define INDENT_FACTOR   2

#define CAN_RUN (g_InitState == 1 || (g_InitState == 0 && Init()))

static char*    g_Spaces;
static int      g_InitState = 0;
static int      g_Indent = 0;
static PRLogModuleInfo* g_LogMod = nsnull;

static PRBool Init()
{
    g_LogMod = PR_NewLogModule("xpclog");
    g_Spaces = new char[SPACE_COUNT+1];
    memset(g_Spaces, ' ', SPACE_COUNT);
    g_Spaces[SPACE_COUNT] = 0;
    if(!g_LogMod || !g_Spaces || !PR_LOG_TEST(g_LogMod,1))
    {
        g_InitState = 1;
        XPC_Log_Finish();
        return PR_FALSE;
    }
    g_InitState = 1;
    return PR_TRUE;
}

void
XPC_Log_Finish()
{
    if(g_InitState == 1)
    {
        delete g_Spaces;
        // we'd like to properly cleanup the LogModule, but nspr owns that
        g_LogMod = nsnull;
    }
    g_InitState = -1;
}

void
XPC_Log_print(const char *fmt, ...)
{
    va_list ap;
    char line[LINE_LEN];

    va_start(ap, fmt);
    PR_vsnprintf(line, sizeof(line)-1, fmt, ap);
    va_end(ap);
    if(g_Indent)
        PR_LogPrint("%s%s",g_Spaces+SPACE_COUNT-(INDENT_FACTOR*g_Indent),line);
    else
        PR_LogPrint("%s",line);
}

PRBool
XPC_Log_Check(int i)
{
    return CAN_RUN && PR_LOG_TEST(g_LogMod,1);
}

void
XPC_Log_Indent()
{
    if(INDENT_FACTOR*(++g_Indent) > SPACE_COUNT)
        g_Indent-- ;
}

void
XPC_Log_Outdent()
{
    if(--g_Indent < 0)
        g_Indent++;
}

void
XPC_Log_Clear_Indent()
{
    g_Indent = 0;
}

#endif
