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annotate devextras.h @ 235:85ea0cc0d313

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Fix uninitialised variable
author charles
date Tue, 11 Nov 2008 01:47:46 +0000
parents 6dbe40ae9e54
children c8620405d086
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1 /*
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2 * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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3 *
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4 * Copyright (C) 2002-2007 Aleph One Ltd.
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5 * for Toby Churchill Ltd and Brightstar Engineering
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6 *
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7 * Created by Charles Manning <charles@aleph1.co.uk>
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU Lesser General Public License version 2.1 as
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11 * published by the Free Software Foundation.
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12 *
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13 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
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14 */
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15
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16 /*
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17 * This file is just holds extra declarations of macros that would normally
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18 * be providesd in the Linux kernel. These macros have been written from
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19 * scratch but are functionally equivalent to the Linux ones.
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20 *
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21 */
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22
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23 #ifndef __EXTRAS_H__
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24 #define __EXTRAS_H__
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25
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26
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27 #if !(defined __KERNEL__)
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28
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29 /* Definition of types */
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30 typedef unsigned char __u8;
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31 typedef unsigned short __u16;
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32 typedef unsigned __u32;
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33
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34 #endif
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35
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36 /*
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37 * This is a simple doubly linked list implementation that matches the
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38 * way the Linux kernel doubly linked list implementation works.
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39 */
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40
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41 struct ylist_head {
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42 struct ylist_head *next; /* next in chain */
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43 struct ylist_head *prev; /* previous in chain */
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44 };
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45
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46
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47 /* Initialise a static list */
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48 #define YLIST_HEAD(name) \
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49 struct ylist_head name = { &(name),&(name)}
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50
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51
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52
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53 /* Initialise a list head to an empty list */
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54 #define YINIT_LIST_HEAD(p) \
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55 do { \
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56 (p)->next = (p);\
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57 (p)->prev = (p); \
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58 } while(0)
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59
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60
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61 /* Add an element to a list */
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62 static __inline__ void ylist_add(struct ylist_head *newEntry,
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63 struct ylist_head *list)
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64 {
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65 struct ylist_head *listNext = list->next;
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66
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67 list->next = newEntry;
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68 newEntry->prev = list;
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69 newEntry->next = listNext;
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70 listNext->prev = newEntry;
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71
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72 }
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73
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74 static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
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75 struct ylist_head *list)
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76 {
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77 struct ylist_head *listPrev = list->prev;
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78
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79 list->prev = newEntry;
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80 newEntry->next = list;
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81 newEntry->prev = listPrev;
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82 listPrev->next = newEntry;
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83
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84 }
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85
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86
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87 /* Take an element out of its current list, with or without
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88 * reinitialising the links.of the entry*/
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89 static __inline__ void ylist_del(struct ylist_head *entry)
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90 {
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91 struct ylist_head *listNext = entry->next;
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92 struct ylist_head *listPrev = entry->prev;
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93
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94 listNext->prev = listPrev;
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95 listPrev->next = listNext;
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96
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97 }
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98
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99 static __inline__ void ylist_del_init(struct ylist_head *entry)
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100 {
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101 ylist_del(entry);
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102 entry->next = entry->prev = entry;
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103 }
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104
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105
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106 /* Test if the list is empty */
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107 static __inline__ int ylist_empty(struct ylist_head *entry)
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108 {
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109 return (entry->next == entry);
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110 }
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111
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112
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113 /* ylist_entry takes a pointer to a list entry and offsets it to that
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114 * we can find a pointer to the object it is embedded in.
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115 */
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116
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117
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118 #define ylist_entry(entry, type, member) \
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119 ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
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120
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121
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122 /* ylist_for_each and list_for_each_safe iterate over lists.
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123 * ylist_for_each_safe uses temporary storage to make the list delete safe
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124 */
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125
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126 #define ylist_for_each(itervar, list) \
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127 for (itervar = (list)->next; itervar != (list); itervar = itervar->next )
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128
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129 #define ylist_for_each_safe(itervar,saveVar, list) \
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130 for (itervar = (list)->next, saveVar = (list)->next->next; itervar != (list); \
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131 itervar = saveVar, saveVar = saveVar->next)
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132
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133
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134 #if !(defined __KERNEL__)
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135
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136
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137 #ifndef WIN32
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138 #include <sys/stat.h>
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139 #endif
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140
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141
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142 #ifdef CONFIG_YAFFS_PROVIDE_DEFS
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143 /* File types */
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144
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145
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146 #define DT_UNKNOWN 0
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147 #define DT_FIFO 1
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148 #define DT_CHR 2
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149 #define DT_DIR 4
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150 #define DT_BLK 6
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151 #define DT_REG 8
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152 #define DT_LNK 10
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153 #define DT_SOCK 12
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154 #define DT_WHT 14
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155
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156
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157 #ifndef WIN32
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158 #include <sys/stat.h>
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159 #endif
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160
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161 /*
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162 * Attribute flags. These should be or-ed together to figure out what
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163 * has been changed!
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164 */
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165 #define ATTR_MODE 1
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166 #define ATTR_UID 2
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167 #define ATTR_GID 4
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168 #define ATTR_SIZE 8
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169 #define ATTR_ATIME 16
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170 #define ATTR_MTIME 32
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171 #define ATTR_CTIME 64
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172
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173 struct iattr {
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174 unsigned int ia_valid;
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175 unsigned ia_mode;
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176 unsigned ia_uid;
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177 unsigned ia_gid;
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178 unsigned ia_size;
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179 unsigned ia_atime;
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180 unsigned ia_mtime;
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181 unsigned ia_ctime;
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182 unsigned int ia_attr_flags;
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183 };
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184
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185 #endif
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186
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187
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188 #define KERN_DEBUG
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189
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190 #else
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191
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192 #include <linux/types.h>
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193 #include <linux/fs.h>
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194 #include <linux/stat.h>
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195
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196 #endif
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197
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198
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199 #endif