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annotate freetype2/freetype/ftotval.h @ 1478:beda5f2f88ce draft

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remove singleton
author Yuhi TOMARI <yuhi@cr.ie.u-ryukyu.ac.jp>
date Fri, 20 Jul 2012 05:47:14 +0900
parents a8ab91f49cac
children
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1 /***************************************************************************/
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2 /* */
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3 /* ftotval.h */
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4 /* */
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5 /* FreeType API for validating OpenType tables (specification). */
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6 /* */
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7 /* Copyright 2004, 2005, 2006, 2007 by */
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8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
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9 /* */
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10 /* This file is part of the FreeType project, and may only be used, */
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11 /* modified, and distributed under the terms of the FreeType project */
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12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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13 /* this file you indicate that you have read the license and */
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14 /* understand and accept it fully. */
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15 /* */
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16 /***************************************************************************/
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17
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18
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19 /***************************************************************************/
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20 /* */
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21 /* */
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22 /* Warning: This module might be moved to a different library in the */
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23 /* future to avoid a tight dependency between FreeType and the */
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24 /* OpenType specification. */
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25 /* */
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26 /* */
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27 /***************************************************************************/
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28
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29
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30 #ifndef __FTOTVAL_H__
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31 #define __FTOTVAL_H__
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32
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33 #include <ft2build.h>
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34 #include FT_FREETYPE_H
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35
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36 #ifdef FREETYPE_H
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37 #error "freetype.h of FreeType 1 has been loaded!"
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38 #error "Please fix the directory search order for header files"
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39 #error "so that freetype.h of FreeType 2 is found first."
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40 #endif
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41
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42
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43 FT_BEGIN_HEADER
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44
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45
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46 /*************************************************************************/
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47 /* */
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48 /* <Section> */
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49 /* ot_validation */
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50 /* */
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51 /* <Title> */
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52 /* OpenType Validation */
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53 /* */
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54 /* <Abstract> */
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55 /* An API to validate OpenType tables. */
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56 /* */
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57 /* <Description> */
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58 /* This section contains the declaration of functions to validate */
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59 /* some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH). */
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60 /* */
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61 /*************************************************************************/
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62
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63
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64 /**********************************************************************
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65 *
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66 * @enum:
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67 * FT_VALIDATE_OTXXX
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68 *
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69 * @description:
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70 * A list of bit-field constants used with @FT_OpenType_Validate to
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71 * indicate which OpenType tables should be validated.
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72 *
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73 * @values:
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74 * FT_VALIDATE_BASE ::
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75 * Validate BASE table.
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76 *
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77 * FT_VALIDATE_GDEF ::
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78 * Validate GDEF table.
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79 *
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80 * FT_VALIDATE_GPOS ::
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81 * Validate GPOS table.
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82 *
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83 * FT_VALIDATE_GSUB ::
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84 * Validate GSUB table.
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85 *
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86 * FT_VALIDATE_JSTF ::
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87 * Validate JSTF table.
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88 *
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89 * FT_VALIDATE_MATH ::
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90 * Validate MATH table.
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91 *
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92 * FT_VALIDATE_OT ::
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93 * Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).
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94 *
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95 */
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96 #define FT_VALIDATE_BASE 0x0100
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97 #define FT_VALIDATE_GDEF 0x0200
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98 #define FT_VALIDATE_GPOS 0x0400
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99 #define FT_VALIDATE_GSUB 0x0800
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100 #define FT_VALIDATE_JSTF 0x1000
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101 #define FT_VALIDATE_MATH 0x2000
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102
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103 #define FT_VALIDATE_OT FT_VALIDATE_BASE | \
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104 FT_VALIDATE_GDEF | \
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105 FT_VALIDATE_GPOS | \
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106 FT_VALIDATE_GSUB | \
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107 FT_VALIDATE_JSTF | \
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108 FT_VALIDATE_MATH
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109
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110 /* */
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111
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112 /**********************************************************************
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113 *
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114 * @function:
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115 * FT_OpenType_Validate
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116 *
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117 * @description:
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118 * Validate various OpenType tables to assure that all offsets and
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119 * indices are valid. The idea is that a higher-level library which
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120 * actually does the text layout can access those tables without
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121 * error checking (which can be quite time consuming).
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122 *
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123 * @input:
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124 * face ::
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125 * A handle to the input face.
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126 *
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127 * validation_flags ::
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128 * A bit field which specifies the tables to be validated. See
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129 * @FT_VALIDATE_OTXXX for possible values.
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130 *
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131 * @output:
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132 * BASE_table ::
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133 * A pointer to the BASE table.
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134 *
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135 * GDEF_table ::
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136 * A pointer to the GDEF table.
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137 *
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138 * GPOS_table ::
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139 * A pointer to the GPOS table.
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140 *
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141 * GSUB_table ::
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142 * A pointer to the GSUB table.
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143 *
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144 * JSTF_table ::
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145 * A pointer to the JSTF table.
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146 *
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147 * @return:
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148 * FreeType error code. 0~means success.
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149 *
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150 * @note:
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151 * This function only works with OpenType fonts, returning an error
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152 * otherwise.
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153 *
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154 * After use, the application should deallocate the five tables with
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155 * @FT_OpenType_Free. A NULL value indicates that the table either
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156 * doesn't exist in the font, or the application hasn't asked for
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157 * validation.
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158 */
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159 FT_EXPORT( FT_Error )
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160 FT_OpenType_Validate( FT_Face face,
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161 FT_UInt validation_flags,
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162 FT_Bytes *BASE_table,
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163 FT_Bytes *GDEF_table,
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164 FT_Bytes *GPOS_table,
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165 FT_Bytes *GSUB_table,
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166 FT_Bytes *JSTF_table );
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167
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168 /* */
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169
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170 /**********************************************************************
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171 *
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172 * @function:
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173 * FT_OpenType_Free
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174 *
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175 * @description:
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176 * Free the buffer allocated by OpenType validator.
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177 *
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178 * @input:
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179 * face ::
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180 * A handle to the input face.
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181 *
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182 * table ::
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183 * The pointer to the buffer that is allocated by
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184 * @FT_OpenType_Validate.
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185 *
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186 * @note:
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187 * This function must be used to free the buffer allocated by
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188 * @FT_OpenType_Validate only.
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189 */
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190 FT_EXPORT( void )
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191 FT_OpenType_Free( FT_Face face,
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192 FT_Bytes table );
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193
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194
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195 /* */
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196
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197
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198 FT_END_HEADER
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199
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200 #endif /* __FTOTVAL_H__ */
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201
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202
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203 /* END */