1 | /**
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2 | * cf_debug.c
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3 | */
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4 | #include "cf_debug.h"
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5 | #include "cf_local.h"
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6 |
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7 | #include <stdio.h>
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8 | #include <stdlib.h>
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9 | #include <ctype.h>
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10 | #include <stdarg.h>
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11 | #include <string.h>
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12 |
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13 | #ifdef _WIN32
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14 | # include <io.h>
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15 | #else
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16 | # include <unistd.h>
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17 | #endif
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18 |
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19 | #define IS_READABLE_CHAR(__c) (' ' <= __c && __c <= '~')
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20 |
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21 | #define CHECK_INVALID_CTX(__ctx) \
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22 | if (__ctx == NULL) \
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23 | return CF_ERROR_DEBUG_INVALID_CTX
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24 |
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25 | #define GET_CTX_OSTREAM(__ctx) \
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26 | ((((CF_DEBUG_CTX *)__ctx)->fp == NULL) \
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27 | ? stderr \
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28 | : ((CF_DEBUG_CTX *)__ctx)->fp)
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29 |
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30 | typedef struct __cf_debug_callstack__
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31 | {
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32 | char file[NAME_LENGTH + 1];
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33 | char func[NAME_LENGTH + 1];
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34 | int line;
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35 |
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36 | struct __cf_debug_callstack__ * caller;
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37 | } S_CF_DEBUG_CALLSTACK, CF_DEBUG_CALLSTACK;
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38 |
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39 | /* implementation of CF_Debug_Ctx */
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40 | typedef struct __cf_debug_ctx__
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41 | {
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42 | char file[NAME_LENGTH + 1];
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43 | char func[NAME_LENGTH + 1];
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44 | int line;
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45 |
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46 | FILE * fp;
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47 |
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48 | CF_DEBUG_CALLSTACK callstack;
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49 | } S_CF_DEBUG_CTX, CF_DEBUG_CTX;
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50 |
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51 | void
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52 | CF_Debug_Local_Print (CF_DEBUG_CTX * ctx,
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53 | const char * fmt,
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54 | va_list valist)
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55 | {
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56 | fprintf (GET_CTX_OSTREAM (ctx), "[DEBUG][%s %s(%d)] ",
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57 | ctx->file,
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58 | ctx->func,
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59 | ctx->line);
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60 | vfprintf (GET_CTX_OSTREAM (ctx), fmt, valist);
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61 | }
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62 |
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63 | CF_Debug_Ctx
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64 | CF_Debug_CreateCtx (void)
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65 | {
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66 | CF_DEBUG_CTX * ctx = NULL;
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67 |
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68 | ctx = (CF_DEBUG_CTX *) calloc (sizeof (CF_DEBUG_CTX), 1);
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69 |
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70 | return (CF_Debug_Ctx) ctx;
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71 | }
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72 |
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73 | int
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74 | CF_Debug_DestroyCtx (CF_Debug_Ctx ctx)
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75 | {
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76 | CF_DEBUG_CTX * context = (CF_DEBUG_CTX *) ctx;
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77 | CF_DEBUG_CALLSTACK * pop = NULL;
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78 | CF_DEBUG_CALLSTACK * next = NULL;
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79 |
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80 | CHECK_INVALID_CTX (ctx);
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81 |
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82 | if (context->fp != NULL)
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83 | fclose (context->fp);
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84 |
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85 | for (pop = next = context->callstack.caller ; pop ; pop = next)
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86 | {
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87 | next = next->caller;
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88 | free (pop);
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89 | }
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90 |
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91 | free (context);
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92 |
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93 | return CF_OK;
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94 | }
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95 |
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96 | int
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97 | CF_Debug_SetOutputFD (CF_Debug_Ctx ctx,
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98 | int fd)
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99 | {
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100 | int result = 0;
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101 | int dupfd = 0;
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102 |
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103 | CF_DEBUG_CTX * context = (CF_DEBUG_CTX *) ctx;
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104 | FILE * fp = NULL;
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105 |
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106 | CHECK_INVALID_CTX (ctx);
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107 |
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108 | TRY
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109 | {
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110 | dupfd = dup (fd);
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111 | if (dupfd < 0)
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112 | {
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113 | result = -1;
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114 | TRY_BREAK;
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115 | }
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116 |
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117 | fp = fdopen (dupfd, "a+");
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118 | if (fp == NULL)
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119 | {
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120 | close (dupfd);
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121 | result = -2;
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122 | TRY_BREAK;
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123 | }
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124 |
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125 | context->fp = fp;
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126 | }
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127 | CATCH_IF (result < 0)
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128 | {
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129 | return CF_ERROR_DEBUG_SET_OUTPUT_FD;
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130 | }
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131 |
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132 | return CF_OK;
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133 | }
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134 |
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135 | int
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136 | CF_Debug_Trace (CF_Debug_Ctx ctx,
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137 | const char * fmt, ...)
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138 | {
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139 | va_list valist;
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140 |
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141 | CHECK_INVALID_CTX (ctx);
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142 |
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143 | va_start (valist, fmt);
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144 | CF_Debug_Local_Print ((CF_DEBUG_CTX *) ctx, fmt, valist);
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145 | va_end (valist);
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146 |
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147 | return CF_OK;
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148 | }
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149 |
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150 | int
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151 | CF_Debug_TraceBin (CF_Debug_Ctx ctx,
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152 | const unsigned char * bin,
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153 | const int len,
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154 | const char * fmt, ...)
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155 | {
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156 | int i, j;
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157 | va_list valist;
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158 | FILE * fp = GET_CTX_OSTREAM (ctx);
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159 |
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160 | CHECK_INVALID_CTX (ctx);
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161 |
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162 | va_start (valist, fmt);
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163 | CF_Debug_Local_Print ((CF_DEBUG_CTX *) ctx, fmt, valist);
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164 |
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165 | for (i = 0 ; i < len ; i += 16)
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166 | {
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167 | fprintf (fp, "[DEBUG][%s %s(%d)] ", __FILE__, __func__, __LINE__);
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168 | fprintf (fp, "%06x : ", i);
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169 |
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170 | for (j = 0 ; j < 16 ; j++)
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171 | {
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172 | if (i+j < len)
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173 | fprintf (fp, "%02x ", bin[i+j]);
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174 | else
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175 | fprintf (fp, " ");
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176 | }
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177 | fprintf (fp, " ");
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178 |
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179 | for (j = 0 ; j < 16 ; j++)
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180 | {
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181 | if (i+j < len)
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182 | fprintf (fp, "%c", IS_READABLE_CHAR(bin[i+j]) ? bin[i+j] : '.');
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183 | }
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184 | fprintf (fp, "\n");
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185 | }
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186 |
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187 | return CF_OK;
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188 | }
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189 |
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190 | int
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191 | CF_Debug_CallStackPush (CF_Debug_Ctx ctx,
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192 | const char * file,
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193 | const char * func,
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194 | const int line)
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195 | {
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196 | CF_DEBUG_CTX * context = (CF_DEBUG_CTX *) ctx;
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197 | CF_DEBUG_CALLSTACK * push = NULL;
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198 |
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199 | CHECK_INVALID_CTX (ctx);
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200 |
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201 | push = (CF_DEBUG_CALLSTACK *) calloc (sizeof (CF_DEBUG_CALLSTACK), 1);
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202 | if (push == NULL)
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203 | return CF_ERROR_DEBUG_PUSH_CALLSTACK;
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204 |
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205 | /* push to callstack */
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206 | sprintf (push->file, "%s", file);
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207 | sprintf (push->func, "%s", func);
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208 | push->line = line;
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209 | push->caller = context->callstack.caller;
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210 | context->callstack.caller = push;
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211 |
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212 | /* set current context */
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213 | sprintf (context->file, "%s", file);
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214 | sprintf (context->func, "%s", func);
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215 | context->line = line;
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216 |
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217 | return CF_OK;
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218 | }
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219 |
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220 | int
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221 | CF_Debug_CallStackPop (CF_Debug_Ctx ctx,
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222 | CF_Debug_CallStack * callstack)
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223 | {
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224 | CF_DEBUG_CTX * context = (CF_DEBUG_CTX *) ctx;
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225 | CF_DEBUG_CALLSTACK * pop = NULL;
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226 |
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227 | CHECK_INVALID_CTX (ctx);
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228 |
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229 | pop = context->callstack.caller;
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230 | if (pop == NULL)
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231 | return CF_ERROR_DEBUG_POP_CALLSTACK;
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232 |
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233 | if (callstack != NULL)
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234 | {
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235 | sprintf (callstack->function, "%s", pop->func);
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236 | callstack->line = pop->line;
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237 | }
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238 |
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239 | memset (context->file, 0x00, sizeof (context->file));
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240 | memset (context->func, 0x00, sizeof (context->func));
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241 | context->line = 0;
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242 |
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243 | /* restore current context */
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244 | if (pop->caller != NULL)
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245 | {
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246 | sprintf (context->file, "%s", pop->caller->file);
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247 | sprintf (context->func, "%s", pop->caller->func);
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248 | context->line = pop->caller->line;
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249 | context->callstack.caller = pop->caller;
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250 | }
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251 |
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252 | free (pop);
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253 |
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254 | return CF_OK;
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255 | }
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