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1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
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2 /* vim: set ts=8 sts=4 et sw=4 tw=99: */ |
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3 /* This Source Code Form is subject to the terms of the Mozilla Public |
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4 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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6 |
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7 /* Debug Logging support. */ |
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8 |
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9 #include "XPCLog.h" |
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10 #include "prlog.h" |
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11 #include "prprf.h" |
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12 #include "mozilla/mozalloc.h" |
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13 #include "mozilla/NullPtr.h" |
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14 #include <string.h> |
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15 #include <stdarg.h> |
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16 |
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17 // this all only works for DEBUG... |
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18 #ifdef DEBUG |
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19 |
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20 #define SPACE_COUNT 200 |
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21 #define LINE_LEN 200 |
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22 #define INDENT_FACTOR 2 |
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23 |
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24 #define CAN_RUN (g_InitState == 1 || (g_InitState == 0 && Init())) |
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25 |
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26 static char* g_Spaces; |
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27 static int g_InitState = 0; |
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28 static int g_Indent = 0; |
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29 static PRLogModuleInfo* g_LogMod = nullptr; |
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30 |
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31 static bool Init() |
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32 { |
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33 g_LogMod = PR_NewLogModule("xpclog"); |
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34 g_Spaces = new char[SPACE_COUNT+1]; |
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35 if (!g_LogMod || !g_Spaces || !PR_LOG_TEST(g_LogMod,1)) { |
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36 g_InitState = 1; |
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37 XPC_Log_Finish(); |
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38 return false; |
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39 } |
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40 memset(g_Spaces, ' ', SPACE_COUNT); |
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41 g_Spaces[SPACE_COUNT] = 0; |
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42 g_InitState = 1; |
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43 return true; |
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44 } |
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45 |
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46 void |
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47 XPC_Log_Finish() |
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48 { |
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49 if (g_InitState == 1) { |
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50 delete [] g_Spaces; |
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51 // we'd like to properly cleanup the LogModule, but nspr owns that |
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52 g_LogMod = nullptr; |
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53 } |
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54 g_InitState = -1; |
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55 } |
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56 |
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57 void |
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58 XPC_Log_print(const char *fmt, ...) |
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59 { |
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60 va_list ap; |
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61 char line[LINE_LEN]; |
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62 |
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63 va_start(ap, fmt); |
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64 PR_vsnprintf(line, sizeof(line)-1, fmt, ap); |
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65 va_end(ap); |
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66 if (g_Indent) |
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67 PR_LogPrint("%s%s",g_Spaces+SPACE_COUNT-(INDENT_FACTOR*g_Indent),line); |
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68 else |
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69 PR_LogPrint("%s",line); |
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70 } |
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71 |
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72 bool |
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73 XPC_Log_Check(int i) |
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74 { |
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75 return CAN_RUN && PR_LOG_TEST(g_LogMod,1); |
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76 } |
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77 |
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78 void |
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79 XPC_Log_Indent() |
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80 { |
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81 if (INDENT_FACTOR*(++g_Indent) > SPACE_COUNT) |
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82 g_Indent-- ; |
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83 } |
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84 |
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85 void |
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86 XPC_Log_Outdent() |
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87 { |
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88 if (--g_Indent < 0) |
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89 g_Indent++; |
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90 } |
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91 |
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92 void |
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93 XPC_Log_Clear_Indent() |
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94 { |
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95 g_Indent = 0; |
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96 } |
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97 |
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98 #endif |