michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* vim: set ts=8 sts=4 et sw=4 tw=99: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* Debug Logging support. */
michael@0: 
michael@0: #include "XPCLog.h"
michael@0: #include "prlog.h"
michael@0: #include "prprf.h"
michael@0: #include "mozilla/mozalloc.h"
michael@0: #include "mozilla/NullPtr.h"
michael@0: #include <string.h>
michael@0: #include <stdarg.h>
michael@0: 
michael@0: // this all only works for DEBUG...
michael@0: #ifdef DEBUG
michael@0: 
michael@0: #define SPACE_COUNT     200
michael@0: #define LINE_LEN        200
michael@0: #define INDENT_FACTOR   2
michael@0: 
michael@0: #define CAN_RUN (g_InitState == 1 || (g_InitState == 0 && Init()))
michael@0: 
michael@0: static char*    g_Spaces;
michael@0: static int      g_InitState = 0;
michael@0: static int      g_Indent = 0;
michael@0: static PRLogModuleInfo* g_LogMod = nullptr;
michael@0: 
michael@0: static bool Init()
michael@0: {
michael@0:     g_LogMod = PR_NewLogModule("xpclog");
michael@0:     g_Spaces = new char[SPACE_COUNT+1];
michael@0:     if (!g_LogMod || !g_Spaces || !PR_LOG_TEST(g_LogMod,1)) {
michael@0:         g_InitState = 1;
michael@0:         XPC_Log_Finish();
michael@0:         return false;
michael@0:     }
michael@0:     memset(g_Spaces, ' ', SPACE_COUNT);
michael@0:     g_Spaces[SPACE_COUNT] = 0;
michael@0:     g_InitState = 1;
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: void
michael@0: XPC_Log_Finish()
michael@0: {
michael@0:     if (g_InitState == 1) {
michael@0:         delete [] g_Spaces;
michael@0:         // we'd like to properly cleanup the LogModule, but nspr owns that
michael@0:         g_LogMod = nullptr;
michael@0:     }
michael@0:     g_InitState = -1;
michael@0: }
michael@0: 
michael@0: void
michael@0: XPC_Log_print(const char *fmt, ...)
michael@0: {
michael@0:     va_list ap;
michael@0:     char line[LINE_LEN];
michael@0: 
michael@0:     va_start(ap, fmt);
michael@0:     PR_vsnprintf(line, sizeof(line)-1, fmt, ap);
michael@0:     va_end(ap);
michael@0:     if (g_Indent)
michael@0:         PR_LogPrint("%s%s",g_Spaces+SPACE_COUNT-(INDENT_FACTOR*g_Indent),line);
michael@0:     else
michael@0:         PR_LogPrint("%s",line);
michael@0: }
michael@0: 
michael@0: bool
michael@0: XPC_Log_Check(int i)
michael@0: {
michael@0:     return CAN_RUN && PR_LOG_TEST(g_LogMod,1);
michael@0: }
michael@0: 
michael@0: void
michael@0: XPC_Log_Indent()
michael@0: {
michael@0:     if (INDENT_FACTOR*(++g_Indent) > SPACE_COUNT)
michael@0:         g_Indent-- ;
michael@0: }
michael@0: 
michael@0: void
michael@0: XPC_Log_Outdent()
michael@0: {
michael@0:     if (--g_Indent < 0)
michael@0:         g_Indent++;
michael@0: }
michael@0: 
michael@0: void
michael@0: XPC_Log_Clear_Indent()
michael@0: {
michael@0:     g_Indent = 0;
michael@0: }
michael@0: 
michael@0: #endif