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annotate src/driver.cpp @ 9436:b3969ef775ba draft

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(svn r13351) -Codechange: disable warnings about unused variable for builds without asserts
author smatz <smatz@openttd.org>
date Sun, 01 Jun 2008 15:08:14 +0000
parents d48433370037
children 47924a4b2ad4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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5584
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1 /* $Id$ */
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2
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d48433370037 (svn r12971) -Documentation: add @file in files that missed them and add something more than whitespace as description of files that don't have a description.
rubidium <rubidium@openttd.org>
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3 /** @file driver.cpp Base for all driver handling. */
6125
46d001ebacf6 (svn r8862) -Cleanup: doxygen changes, again. Mostly @files missing tags and a few comments style.
belugas <belugas@openttd.org>
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4
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5 #include "stdafx.h"
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6 #include "openttd.h"
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7 #include "debug.h"
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8 #include "driver.h"
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9
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c6917d8e8c25 (svn r10444) -Codechange: switch to c++ classes and inheritance for sound/music/video drivers, using self-registration based on the blitter-model.
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10 #include "sound/sound_driver.hpp"
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11 #include "music/music_driver.hpp"
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12 #include "video/video_driver.hpp"
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14 VideoDriver *_video_driver;
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rubidium <rubidium@openttd.org>
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15 char _ini_videodriver[32];
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16 int _num_resolutions;
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17 uint16 _resolutions[32][2];
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18 uint16 _cur_resolution[2];
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20 SoundDriver *_sound_driver;
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21 char _ini_sounddriver[32];
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c6917d8e8c25 (svn r10444) -Codechange: switch to c++ classes and inheritance for sound/music/video drivers, using self-registration based on the blitter-model.
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23 MusicDriver *_music_driver;
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24 char _ini_musicdriver[32];
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26 char _ini_blitter[32];
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28 static const char* GetDriverParam(const char* const* parm, const char* name)
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29 {
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30 size_t len;
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32 if (parm == NULL) return NULL;
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34 len = strlen(name);
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35 for (; *parm != NULL; parm++) {
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36 const char* p = *parm;
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37
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38 if (strncmp(p, name, len) == 0) {
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39 if (p[len] == '=') return p + len + 1;
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40 if (p[len] == '\0') return p + len;
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41 }
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42 }
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43 return NULL;
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44 }
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46 bool GetDriverParamBool(const char* const* parm, const char* name)
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47 {
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48 return GetDriverParam(parm, name) != NULL;
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49 }
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51 int GetDriverParamInt(const char* const* parm, const char* name, int def)
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52 {
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53 const char* p = GetDriverParam(parm, name);
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54 return p != NULL ? atoi(p) : def;
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55 }
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56
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57 /**
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58 * Find the requested driver and return its class.
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59 * @param name the driver to select.
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60 * @post Sets the driver so GetCurrentDriver() returns it too.
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61 */
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62 const Driver *DriverFactoryBase::SelectDriver(const char *name, Driver::Type type)
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63 {
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64 if (GetDrivers().size() == 0) return NULL;
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65
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66 if (*name == '\0') {
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67 /* Probe for this driver */
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68 for (int priority = 10; priority >= 0; priority--) {
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69 Drivers::iterator it = GetDrivers().begin();
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70 for (; it != GetDrivers().end(); ++it) {
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71 DriverFactoryBase *d = (*it).second;
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72
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73 /* Check driver type */
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74 if (d->type != type) continue;
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75 if (d->priority != priority) continue;
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76
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77 Driver *newd = d->CreateInstance();
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78 const char *err = newd->Start(NULL);
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79 if (err == NULL) {
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80 DEBUG(driver, 1, "Successfully probed %s driver '%s'", GetDriverTypeName(type), d->name);
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81 delete *GetActiveDriver(type);
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82 *GetActiveDriver(type) = newd;
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83 return newd;
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84 }
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85
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86 DEBUG(driver, 1, "Probing %s driver '%s' failed with error: %s", GetDriverTypeName(type), d->name, err);
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87 delete newd;
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88 }
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89 }
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90 error("Couldn't find any suitable %s driver", GetDriverTypeName(type));
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91 } else {
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92 char *parm;
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93 char buffer[256];
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94 const char *parms[32];
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95
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96 /* Extract the driver name and put parameter list in parm */
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97 strecpy(buffer, name, lastof(buffer));
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98 parm = strchr(buffer, ':');
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99 parms[0] = NULL;
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100 if (parm != NULL) {
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101 uint np = 0;
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102 /* Tokenize the parm. */
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103 do {
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104 *parm++ = '\0';
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105 if (np < lengthof(parms) - 1) parms[np++] = parm;
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106 while (*parm != '\0' && *parm != ',') parm++;
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107 } while (*parm == ',');
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108 parms[np] = NULL;
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109 }
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110
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111 /* Find this driver */
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112 Drivers::iterator it = GetDrivers().begin();
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113 for (; it != GetDrivers().end(); ++it) {
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114 DriverFactoryBase *d = (*it).second;
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115
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116 /* Check driver type */
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117 if (d->type != type) continue;
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118
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119 /* Check driver name */
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120 if (strcasecmp(buffer, d->name) != 0) continue;
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121
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122 /* Found our driver, let's try it */
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123 Driver *newd = d->CreateInstance();
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124
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125 const char *err = newd->Start(parms);
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126 if (err != NULL) {
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127 delete newd;
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128 error("Unable to load driver '%s'. The error was: %s", d->name, err);
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129 }
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130
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131 DEBUG(driver, 1, "Successfully loaded %s driver '%s'", GetDriverTypeName(type), d->name);
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132 delete *GetActiveDriver(type);
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133 *GetActiveDriver(type) = newd;
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134 return newd;
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135 }
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136 error("No such %s driver: %s\n", GetDriverTypeName(type), buffer);
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137 }
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138 }
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139
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140 /**
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141 * Register a driver internally, based on its name.
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142 * @param name the name of the driver.
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143 * @note an assert() will be trigger if 2 driver with the same name try to register.
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144 */
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145 void DriverFactoryBase::RegisterDriver(const char *name, Driver::Type type, int priority)
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146 {
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147 /* Don't register nameless Drivers */
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148 if (name == NULL) return;
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149
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150 this->name = strdup(name);
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151 this->type = type;
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152 this->priority = priority;
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153
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154 /* Prefix the name with driver type to make it unique */
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155 char buf[32];
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156 strecpy(buf, GetDriverTypeName(type), lastof(buf));
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157 strecpy(buf + 5, name, lastof(buf));
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158
9436
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159 std::pair<Drivers::iterator, bool> P = GetDrivers().insert(Drivers::value_type(buf, this));
8844
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160 assert(P.second);
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161 }
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162
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163 /**
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164 * Build a human readable list of available drivers, grouped by type.
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165 */
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166 char *DriverFactoryBase::GetDriversInfo(char *p, const char *last)
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167 {
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168 for (Driver::Type type = Driver::DT_BEGIN; type != Driver::DT_END; type++) {
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169 p += snprintf(p, last - p, "List of %s drivers:\n", GetDriverTypeName(type));
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170
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171 for (int priority = 10; priority >= 0; priority--) {
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172 Drivers::iterator it = GetDrivers().begin();
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173 for (; it != GetDrivers().end(); it++) {
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174 DriverFactoryBase *d = (*it).second;
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175 if (d->type != type) continue;
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176 if (d->priority != priority) continue;
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177 p += snprintf(p, last - p, "%18s: %s\n", d->name, d->GetDescription());
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178 }
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179 }
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180
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181 p += snprintf(p, last - p, "\n");
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182 }
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183
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184 return p;
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185 }