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7
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * arabic.c: functions for Arabic language
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12 *
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13 * Included by main.c, when FEAT_ARABIC & FEAT_GUI is defined.
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14 *
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15 * --
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16 *
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17 * Author: Nadim Shaikli & Isam Bayazidi
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18 *
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19 */
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20
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21 static int A_is_a __ARGS((int cur_c));
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22 static int A_is_s __ARGS((int cur_c));
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23 static int A_is_f __ARGS((int cur_c));
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24 static int chg_c_a2s __ARGS((int cur_c));
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25 static int chg_c_a2i __ARGS((int cur_c));
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26 static int chg_c_a2m __ARGS((int cur_c));
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27 static int chg_c_a2f __ARGS((int cur_c));
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28 static int chg_c_i2m __ARGS((int cur_c));
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29 static int chg_c_f2m __ARGS((int cur_c));
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30 static int chg_c_laa2i __ARGS((int hid_c));
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31 static int chg_c_laa2f __ARGS((int hid_c));
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32 static int half_shape __ARGS((int c));
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33 static int A_firstc_laa __ARGS((int c1, int c));
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34 static int A_is_harakat __ARGS((int c));
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35 static int A_is_iso __ARGS((int c));
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36 static int A_is_formb __ARGS((int c));
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37 static int A_is_ok __ARGS((int c));
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38 static int A_is_valid __ARGS((int c));
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39 static int A_is_special __ARGS((int c));
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40
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41
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42 /*
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43 * Returns True if c is an ISO-8859-6 shaped ARABIC letter (user entered)
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44 */
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45 static int
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46 A_is_a(cur_c)
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47 int cur_c;
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48 {
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49 switch (cur_c)
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50 {
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51 case a_HAMZA:
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52 case a_ALEF_MADDA:
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53 case a_ALEF_HAMZA_ABOVE:
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54 case a_WAW_HAMZA:
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55 case a_ALEF_HAMZA_BELOW:
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56 case a_YEH_HAMZA:
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57 case a_ALEF:
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58 case a_BEH:
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59 case a_TEH_MARBUTA:
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60 case a_TEH:
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61 case a_THEH:
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62 case a_JEEM:
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63 case a_HAH:
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64 case a_KHAH:
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65 case a_DAL:
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66 case a_THAL:
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67 case a_REH:
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68 case a_ZAIN:
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69 case a_SEEN:
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70 case a_SHEEN:
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71 case a_SAD:
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72 case a_DAD:
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73 case a_TAH:
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74 case a_ZAH:
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75 case a_AIN:
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76 case a_GHAIN:
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77 case a_TATWEEL:
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78 case a_FEH:
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79 case a_QAF:
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80 case a_KAF:
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81 case a_LAM:
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82 case a_MEEM:
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83 case a_NOON:
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84 case a_HEH:
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85 case a_WAW:
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86 case a_ALEF_MAKSURA:
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87 case a_YEH:
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88 return TRUE;
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89 }
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90
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91 return FALSE;
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92 }
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93
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94
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95 /*
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96 * Returns True if c is an Isolated Form-B ARABIC letter
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97 */
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98 static int
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99 A_is_s(cur_c)
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100 int cur_c;
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101 {
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102 switch (cur_c)
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103 {
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104 case a_s_HAMZA:
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105 case a_s_ALEF_MADDA:
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106 case a_s_ALEF_HAMZA_ABOVE:
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107 case a_s_WAW_HAMZA:
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108 case a_s_ALEF_HAMZA_BELOW:
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109 case a_s_YEH_HAMZA:
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110 case a_s_ALEF:
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111 case a_s_BEH:
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112 case a_s_TEH_MARBUTA:
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113 case a_s_TEH:
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114 case a_s_THEH:
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115 case a_s_JEEM:
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116 case a_s_HAH:
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117 case a_s_KHAH:
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118 case a_s_DAL:
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119 case a_s_THAL:
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120 case a_s_REH:
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121 case a_s_ZAIN:
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122 case a_s_SEEN:
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123 case a_s_SHEEN:
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124 case a_s_SAD:
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125 case a_s_DAD:
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126 case a_s_TAH:
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127 case a_s_ZAH:
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128 case a_s_AIN:
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129 case a_s_GHAIN:
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130 case a_s_FEH:
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131 case a_s_QAF:
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132 case a_s_KAF:
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133 case a_s_LAM:
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134 case a_s_MEEM:
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135 case a_s_NOON:
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136 case a_s_HEH:
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137 case a_s_WAW:
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138 case a_s_ALEF_MAKSURA:
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139 case a_s_YEH:
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140 return TRUE;
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141 }
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142
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143 return FALSE;
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144 }
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145
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146
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147 /*
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148 * Returns True if c is a Final shape of an ARABIC letter
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149 */
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150 static int
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151 A_is_f(cur_c)
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152 int cur_c;
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153 {
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154 switch (cur_c)
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155 {
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156 case a_f_ALEF_MADDA:
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157 case a_f_ALEF_HAMZA_ABOVE:
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158 case a_f_WAW_HAMZA:
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159 case a_f_ALEF_HAMZA_BELOW:
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160 case a_f_YEH_HAMZA:
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161 case a_f_ALEF:
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162 case a_f_BEH:
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163 case a_f_TEH_MARBUTA:
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164 case a_f_TEH:
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165 case a_f_THEH:
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166 case a_f_JEEM:
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167 case a_f_HAH:
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168 case a_f_KHAH:
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169 case a_f_DAL:
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170 case a_f_THAL:
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171 case a_f_REH:
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172 case a_f_ZAIN:
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173 case a_f_SEEN:
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174 case a_f_SHEEN:
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175 case a_f_SAD:
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176 case a_f_DAD:
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177 case a_f_TAH:
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178 case a_f_ZAH:
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179 case a_f_AIN:
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180 case a_f_GHAIN:
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181 case a_f_FEH:
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182 case a_f_QAF:
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183 case a_f_KAF:
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184 case a_f_LAM:
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185 case a_f_MEEM:
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186 case a_f_NOON:
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187 case a_f_HEH:
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188 case a_f_WAW:
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189 case a_f_ALEF_MAKSURA:
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190 case a_f_YEH:
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191 case a_f_LAM_ALEF_MADDA_ABOVE:
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192 case a_f_LAM_ALEF_HAMZA_ABOVE:
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193 case a_f_LAM_ALEF_HAMZA_BELOW:
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194 case a_f_LAM_ALEF:
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195 return TRUE;
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196 }
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197 return FALSE;
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198 }
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199
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200
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201 /*
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202 * Change shape - from ISO-8859-6/Isolated to Form-B Isolated
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203 */
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204 static int
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205 chg_c_a2s(cur_c)
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206 int cur_c;
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207 {
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208 int tempc;
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209
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210 switch (cur_c)
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211 {
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212 case a_HAMZA:
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213 tempc = a_s_HAMZA;
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214 break;
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215 case a_ALEF_MADDA:
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216 tempc = a_s_ALEF_MADDA;
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217 break;
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218 case a_ALEF_HAMZA_ABOVE:
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219 tempc = a_s_ALEF_HAMZA_ABOVE;
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220 break;
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221 case a_WAW_HAMZA:
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222 tempc = a_s_WAW_HAMZA;
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223 break;
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224 case a_ALEF_HAMZA_BELOW:
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225 tempc = a_s_ALEF_HAMZA_BELOW;
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226 break;
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227 case a_YEH_HAMZA:
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228 tempc = a_s_YEH_HAMZA;
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229 break;
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230 case a_ALEF:
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231 tempc = a_s_ALEF;
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232 break;
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233 case a_TEH_MARBUTA:
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234 tempc = a_s_TEH_MARBUTA;
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235 break;
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236 case a_DAL:
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237 tempc = a_s_DAL;
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238 break;
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239 case a_THAL:
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240 tempc = a_s_THAL;
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241 break;
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242 case a_REH:
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243 tempc = a_s_REH;
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244 break;
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245 case a_ZAIN:
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246 tempc = a_s_ZAIN;
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247 break;
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248 case a_TATWEEL: /* exceptions */
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249 tempc = cur_c;
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250 break;
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251 case a_WAW:
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252 tempc = a_s_WAW;
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253 break;
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254 case a_ALEF_MAKSURA:
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255 tempc = a_s_ALEF_MAKSURA;
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256 break;
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257 case a_BEH:
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258 tempc = a_s_BEH;
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259 break;
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260 case a_TEH:
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261 tempc = a_s_TEH;
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262 break;
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263 case a_THEH:
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264 tempc = a_s_THEH;
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265 break;
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266 case a_JEEM:
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267 tempc = a_s_JEEM;
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268 break;
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269 case a_HAH:
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270 tempc = a_s_HAH;
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271 break;
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272 case a_KHAH:
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273 tempc = a_s_KHAH;
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274 break;
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275 case a_SEEN:
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276 tempc = a_s_SEEN;
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277 break;
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278 case a_SHEEN:
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279 tempc = a_s_SHEEN;
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280 break;
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281 case a_SAD:
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282 tempc = a_s_SAD;
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283 break;
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284 case a_DAD:
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285 tempc = a_s_DAD;
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286 break;
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287 case a_TAH:
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288 tempc = a_s_TAH;
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289 break;
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290 case a_ZAH:
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291 tempc = a_s_ZAH;
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292 break;
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293 case a_AIN:
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294 tempc = a_s_AIN;
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295 break;
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296 case a_GHAIN:
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297 tempc = a_s_GHAIN;
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298 break;
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299 case a_FEH:
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300 tempc = a_s_FEH;
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301 break;
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302 case a_QAF:
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303 tempc = a_s_QAF;
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304 break;
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305 case a_KAF:
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306 tempc = a_s_KAF;
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307 break;
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308 case a_LAM:
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309 tempc = a_s_LAM;
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310 break;
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311 case a_MEEM:
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312 tempc = a_s_MEEM;
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313 break;
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314 case a_NOON:
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315 tempc = a_s_NOON;
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316 break;
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317 case a_HEH:
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318 tempc = a_s_HEH;
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319 break;
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320 case a_YEH:
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321 tempc = a_s_YEH;
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322 break;
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323 default:
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324 tempc = 0;
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325 }
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326
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327 return tempc;
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328 }
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329
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330
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331 /*
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332 * Change shape - from ISO-8859-6/Isolated to Initial
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333 */
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334 static int
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335 chg_c_a2i(cur_c)
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336 int cur_c;
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337 {
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338 int tempc;
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339
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340 switch (cur_c)
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341 {
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342 case a_YEH_HAMZA:
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343 tempc = a_i_YEH_HAMZA;
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344 break;
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345 case a_HAMZA: /* exceptions */
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346 tempc = a_s_HAMZA;
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347 break;
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348 case a_ALEF_MADDA: /* exceptions */
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349 tempc = a_s_ALEF_MADDA;
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350 break;
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351 case a_ALEF_HAMZA_ABOVE: /* exceptions */
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352 tempc = a_s_ALEF_HAMZA_ABOVE;
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353 break;
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354 case a_WAW_HAMZA: /* exceptions */
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355 tempc = a_s_WAW_HAMZA;
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356 break;
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357 case a_ALEF_HAMZA_BELOW: /* exceptions */
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358 tempc = a_s_ALEF_HAMZA_BELOW;
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359 break;
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360 case a_ALEF: /* exceptions */
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361 tempc = a_s_ALEF;
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362 break;
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363 case a_TEH_MARBUTA: /* exceptions */
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364 tempc = a_s_TEH_MARBUTA;
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365 break;
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366 case a_DAL: /* exceptions */
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367 tempc = a_s_DAL;
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368 break;
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369 case a_THAL: /* exceptions */
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370 tempc = a_s_THAL;
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371 break;
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372 case a_REH: /* exceptions */
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373 tempc = a_s_REH;
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374 break;
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375 case a_ZAIN: /* exceptions */
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376 tempc = a_s_ZAIN;
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377 break;
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378 case a_TATWEEL: /* exceptions */
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379 tempc = cur_c;
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380 break;
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381 case a_WAW: /* exceptions */
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382 tempc = a_s_WAW;
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383 break;
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384 case a_ALEF_MAKSURA: /* exceptions */
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385 tempc = a_s_ALEF_MAKSURA;
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386 break;
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387 case a_BEH:
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388 tempc = a_i_BEH;
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389 break;
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390 case a_TEH:
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391 tempc = a_i_TEH;
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392 break;
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393 case a_THEH:
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394 tempc = a_i_THEH;
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395 break;
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396 case a_JEEM:
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397 tempc = a_i_JEEM;
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398 break;
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399 case a_HAH:
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400 tempc = a_i_HAH;
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401 break;
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402 case a_KHAH:
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403 tempc = a_i_KHAH;
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404 break;
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405 case a_SEEN:
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406 tempc = a_i_SEEN;
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407 break;
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408 case a_SHEEN:
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409 tempc = a_i_SHEEN;
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410 break;
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411 case a_SAD:
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412 tempc = a_i_SAD;
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413 break;
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414 case a_DAD:
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415 tempc = a_i_DAD;
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416 break;
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417 case a_TAH:
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418 tempc = a_i_TAH;
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419 break;
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420 case a_ZAH:
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421 tempc = a_i_ZAH;
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422 break;
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423 case a_AIN:
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424 tempc = a_i_AIN;
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425 break;
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426 case a_GHAIN:
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427 tempc = a_i_GHAIN;
|
|
|
428 break;
|
|
|
429 case a_FEH:
|
|
|
430 tempc = a_i_FEH;
|
|
|
431 break;
|
|
|
432 case a_QAF:
|
|
|
433 tempc = a_i_QAF;
|
|
|
434 break;
|
|
|
435 case a_KAF:
|
|
|
436 tempc = a_i_KAF;
|
|
|
437 break;
|
|
|
438 case a_LAM:
|
|
|
439 tempc = a_i_LAM;
|
|
|
440 break;
|
|
|
441 case a_MEEM:
|
|
|
442 tempc = a_i_MEEM;
|
|
|
443 break;
|
|
|
444 case a_NOON:
|
|
|
445 tempc = a_i_NOON;
|
|
|
446 break;
|
|
|
447 case a_HEH:
|
|
|
448 tempc = a_i_HEH;
|
|
|
449 break;
|
|
|
450 case a_YEH:
|
|
|
451 tempc = a_i_YEH;
|
|
|
452 break;
|
|
|
453 default:
|
|
|
454 tempc = 0;
|
|
|
455 }
|
|
|
456
|
|
|
457 return tempc;
|
|
|
458 }
|
|
|
459
|
|
|
460
|
|
|
461 /*
|
|
|
462 * Change shape - from ISO-8859-6/Isolated to Medial
|
|
|
463 */
|
|
|
464 static int
|
|
|
465 chg_c_a2m(cur_c)
|
|
|
466 int cur_c;
|
|
|
467 {
|
|
|
468 int tempc;
|
|
|
469
|
|
|
470 switch (cur_c)
|
|
|
471 {
|
|
|
472 case a_HAMZA: /* exception */
|
|
|
473 tempc = a_s_HAMZA;
|
|
|
474 break;
|
|
|
475 case a_ALEF_MADDA: /* exception */
|
|
|
476 tempc = a_f_ALEF_MADDA;
|
|
|
477 break;
|
|
|
478 case a_ALEF_HAMZA_ABOVE: /* exception */
|
|
|
479 tempc = a_f_ALEF_HAMZA_ABOVE;
|
|
|
480 break;
|
|
|
481 case a_WAW_HAMZA: /* exception */
|
|
|
482 tempc = a_f_WAW_HAMZA;
|
|
|
483 break;
|
|
|
484 case a_ALEF_HAMZA_BELOW: /* exception */
|
|
|
485 tempc = a_f_ALEF_HAMZA_BELOW;
|
|
|
486 break;
|
|
|
487 case a_YEH_HAMZA:
|
|
|
488 tempc = a_m_YEH_HAMZA;
|
|
|
489 break;
|
|
|
490 case a_ALEF: /* exception */
|
|
|
491 tempc = a_f_ALEF;
|
|
|
492 break;
|
|
|
493 case a_BEH:
|
|
|
494 tempc = a_m_BEH;
|
|
|
495 break;
|
|
|
496 case a_TEH_MARBUTA: /* exception */
|
|
|
497 tempc = a_f_TEH_MARBUTA;
|
|
|
498 break;
|
|
|
499 case a_TEH:
|
|
|
500 tempc = a_m_TEH;
|
|
|
501 break;
|
|
|
502 case a_THEH:
|
|
|
503 tempc = a_m_THEH;
|
|
|
504 break;
|
|
|
505 case a_JEEM:
|
|
|
506 tempc = a_m_JEEM;
|
|
|
507 break;
|
|
|
508 case a_HAH:
|
|
|
509 tempc = a_m_HAH;
|
|
|
510 break;
|
|
|
511 case a_KHAH:
|
|
|
512 tempc = a_m_KHAH;
|
|
|
513 break;
|
|
|
514 case a_DAL: /* exception */
|
|
|
515 tempc = a_f_DAL;
|
|
|
516 break;
|
|
|
517 case a_THAL: /* exception */
|
|
|
518 tempc = a_f_THAL;
|
|
|
519 break;
|
|
|
520 case a_REH: /* exception */
|
|
|
521 tempc = a_f_REH;
|
|
|
522 break;
|
|
|
523 case a_ZAIN: /* exception */
|
|
|
524 tempc = a_f_ZAIN;
|
|
|
525 break;
|
|
|
526 case a_SEEN:
|
|
|
527 tempc = a_m_SEEN;
|
|
|
528 break;
|
|
|
529 case a_SHEEN:
|
|
|
530 tempc = a_m_SHEEN;
|
|
|
531 break;
|
|
|
532 case a_SAD:
|
|
|
533 tempc = a_m_SAD;
|
|
|
534 break;
|
|
|
535 case a_DAD:
|
|
|
536 tempc = a_m_DAD;
|
|
|
537 break;
|
|
|
538 case a_TAH:
|
|
|
539 tempc = a_m_TAH;
|
|
|
540 break;
|
|
|
541 case a_ZAH:
|
|
|
542 tempc = a_m_ZAH;
|
|
|
543 break;
|
|
|
544 case a_AIN:
|
|
|
545 tempc = a_m_AIN;
|
|
|
546 break;
|
|
|
547 case a_GHAIN:
|
|
|
548 tempc = a_m_GHAIN;
|
|
|
549 break;
|
|
|
550 case a_TATWEEL: /* exception */
|
|
|
551 tempc = cur_c;
|
|
|
552 break;
|
|
|
553 case a_FEH:
|
|
|
554 tempc = a_m_FEH;
|
|
|
555 break;
|
|
|
556 case a_QAF:
|
|
|
557 tempc = a_m_QAF;
|
|
|
558 break;
|
|
|
559 case a_KAF:
|
|
|
560 tempc = a_m_KAF;
|
|
|
561 break;
|
|
|
562 case a_LAM:
|
|
|
563 tempc = a_m_LAM;
|
|
|
564 break;
|
|
|
565 case a_MEEM:
|
|
|
566 tempc = a_m_MEEM;
|
|
|
567 break;
|
|
|
568 case a_NOON:
|
|
|
569 tempc = a_m_NOON;
|
|
|
570 break;
|
|
|
571 case a_HEH:
|
|
|
572 tempc = a_m_HEH;
|
|
|
573 break;
|
|
|
574 case a_WAW: /* exception */
|
|
|
575 tempc = a_f_WAW;
|
|
|
576 break;
|
|
|
577 case a_ALEF_MAKSURA: /* exception */
|
|
|
578 tempc = a_f_ALEF_MAKSURA;
|
|
|
579 break;
|
|
|
580 case a_YEH:
|
|
|
581 tempc = a_m_YEH;
|
|
|
582 break;
|
|
|
583 default:
|
|
|
584 tempc = 0;
|
|
|
585 }
|
|
|
586
|
|
|
587 return tempc;
|
|
|
588 }
|
|
|
589
|
|
|
590
|
|
|
591 /*
|
|
|
592 * Change shape - from ISO-8859-6/Isolated to final
|
|
|
593 */
|
|
|
594 static int
|
|
|
595 chg_c_a2f(cur_c)
|
|
|
596 int cur_c;
|
|
|
597 {
|
|
|
598 int tempc;
|
|
|
599
|
|
|
600 /* NOTE: these encodings need to be accounted for
|
|
|
601
|
|
|
602 a_f_ALEF_MADDA;
|
|
|
603 a_f_ALEF_HAMZA_ABOVE;
|
|
|
604 a_f_ALEF_HAMZA_BELOW;
|
|
|
605 a_f_LAM_ALEF_MADDA_ABOVE;
|
|
|
606 a_f_LAM_ALEF_HAMZA_ABOVE;
|
|
|
607 a_f_LAM_ALEF_HAMZA_BELOW;
|
|
|
608 */
|
|
|
609
|
|
|
610 switch (cur_c)
|
|
|
611 {
|
|
|
612 case a_HAMZA: /* exception */
|
|
|
613 tempc = a_s_HAMZA;
|
|
|
614 break;
|
|
|
615 case a_ALEF_MADDA:
|
|
|
616 tempc = a_f_ALEF_MADDA;
|
|
|
617 break;
|
|
|
618 case a_ALEF_HAMZA_ABOVE:
|
|
|
619 tempc = a_f_ALEF_HAMZA_ABOVE;
|
|
|
620 break;
|
|
|
621 case a_WAW_HAMZA:
|
|
|
622 tempc = a_f_WAW_HAMZA;
|
|
|
623 break;
|
|
|
624 case a_ALEF_HAMZA_BELOW:
|
|
|
625 tempc = a_f_ALEF_HAMZA_BELOW;
|
|
|
626 break;
|
|
|
627 case a_YEH_HAMZA:
|
|
|
628 tempc = a_f_YEH_HAMZA;
|
|
|
629 break;
|
|
|
630 case a_ALEF:
|
|
|
631 tempc = a_f_ALEF;
|
|
|
632 break;
|
|
|
633 case a_BEH:
|
|
|
634 tempc = a_f_BEH;
|
|
|
635 break;
|
|
|
636 case a_TEH_MARBUTA:
|
|
|
637 tempc = a_f_TEH_MARBUTA;
|
|
|
638 break;
|
|
|
639 case a_TEH:
|
|
|
640 tempc = a_f_TEH;
|
|
|
641 break;
|
|
|
642 case a_THEH:
|
|
|
643 tempc = a_f_THEH;
|
|
|
644 break;
|
|
|
645 case a_JEEM:
|
|
|
646 tempc = a_f_JEEM;
|
|
|
647 break;
|
|
|
648 case a_HAH:
|
|
|
649 tempc = a_f_HAH;
|
|
|
650 break;
|
|
|
651 case a_KHAH:
|
|
|
652 tempc = a_f_KHAH;
|
|
|
653 break;
|
|
|
654 case a_DAL:
|
|
|
655 tempc = a_f_DAL;
|
|
|
656 break;
|
|
|
657 case a_THAL:
|
|
|
658 tempc = a_f_THAL;
|
|
|
659 break;
|
|
|
660 case a_REH:
|
|
|
661 tempc = a_f_REH;
|
|
|
662 break;
|
|
|
663 case a_ZAIN:
|
|
|
664 tempc = a_f_ZAIN;
|
|
|
665 break;
|
|
|
666 case a_SEEN:
|
|
|
667 tempc = a_f_SEEN;
|
|
|
668 break;
|
|
|
669 case a_SHEEN:
|
|
|
670 tempc = a_f_SHEEN;
|
|
|
671 break;
|
|
|
672 case a_SAD:
|
|
|
673 tempc = a_f_SAD;
|
|
|
674 break;
|
|
|
675 case a_DAD:
|
|
|
676 tempc = a_f_DAD;
|
|
|
677 break;
|
|
|
678 case a_TAH:
|
|
|
679 tempc = a_f_TAH;
|
|
|
680 break;
|
|
|
681 case a_ZAH:
|
|
|
682 tempc = a_f_ZAH;
|
|
|
683 break;
|
|
|
684 case a_AIN:
|
|
|
685 tempc = a_f_AIN;
|
|
|
686 break;
|
|
|
687 case a_GHAIN:
|
|
|
688 tempc = a_f_GHAIN;
|
|
|
689 break;
|
|
|
690 case a_TATWEEL: /* exception */
|
|
|
691 tempc = cur_c;
|
|
|
692 break;
|
|
|
693 case a_FEH:
|
|
|
694 tempc = a_f_FEH;
|
|
|
695 break;
|
|
|
696 case a_QAF:
|
|
|
697 tempc = a_f_QAF;
|
|
|
698 break;
|
|
|
699 case a_KAF:
|
|
|
700 tempc = a_f_KAF;
|
|
|
701 break;
|
|
|
702 case a_LAM:
|
|
|
703 tempc = a_f_LAM;
|
|
|
704 break;
|
|
|
705 case a_MEEM:
|
|
|
706 tempc = a_f_MEEM;
|
|
|
707 break;
|
|
|
708 case a_NOON:
|
|
|
709 tempc = a_f_NOON;
|
|
|
710 break;
|
|
|
711 case a_HEH:
|
|
|
712 tempc = a_f_HEH;
|
|
|
713 break;
|
|
|
714 case a_WAW:
|
|
|
715 tempc = a_f_WAW;
|
|
|
716 break;
|
|
|
717 case a_ALEF_MAKSURA:
|
|
|
718 tempc = a_f_ALEF_MAKSURA;
|
|
|
719 break;
|
|
|
720 case a_YEH:
|
|
|
721 tempc = a_f_YEH;
|
|
|
722 break;
|
|
|
723 default:
|
|
|
724 tempc = 0;
|
|
|
725 }
|
|
|
726
|
|
|
727 return tempc;
|
|
|
728 }
|
|
|
729
|
|
|
730
|
|
|
731 /*
|
|
|
732 * Change shape - from Initial to Medial
|
|
|
733 */
|
|
|
734 static int
|
|
|
735 chg_c_i2m(cur_c)
|
|
|
736 int cur_c;
|
|
|
737 {
|
|
|
738 int tempc;
|
|
|
739
|
|
|
740 switch (cur_c)
|
|
|
741 {
|
|
|
742 case a_i_YEH_HAMZA:
|
|
|
743 tempc = a_m_YEH_HAMZA;
|
|
|
744 break;
|
|
|
745 case a_i_BEH:
|
|
|
746 tempc = a_m_BEH;
|
|
|
747 break;
|
|
|
748 case a_i_TEH:
|
|
|
749 tempc = a_m_TEH;
|
|
|
750 break;
|
|
|
751 case a_i_THEH:
|
|
|
752 tempc = a_m_THEH;
|
|
|
753 break;
|
|
|
754 case a_i_JEEM:
|
|
|
755 tempc = a_m_JEEM;
|
|
|
756 break;
|
|
|
757 case a_i_HAH:
|
|
|
758 tempc = a_m_HAH;
|
|
|
759 break;
|
|
|
760 case a_i_KHAH:
|
|
|
761 tempc = a_m_KHAH;
|
|
|
762 break;
|
|
|
763 case a_i_SEEN:
|
|
|
764 tempc = a_m_SEEN;
|
|
|
765 break;
|
|
|
766 case a_i_SHEEN:
|
|
|
767 tempc = a_m_SHEEN;
|
|
|
768 break;
|
|
|
769 case a_i_SAD:
|
|
|
770 tempc = a_m_SAD;
|
|
|
771 break;
|
|
|
772 case a_i_DAD:
|
|
|
773 tempc = a_m_DAD;
|
|
|
774 break;
|
|
|
775 case a_i_TAH:
|
|
|
776 tempc = a_m_TAH;
|
|
|
777 break;
|
|
|
778 case a_i_ZAH:
|
|
|
779 tempc = a_m_ZAH;
|
|
|
780 break;
|
|
|
781 case a_i_AIN:
|
|
|
782 tempc = a_m_AIN;
|
|
|
783 break;
|
|
|
784 case a_i_GHAIN:
|
|
|
785 tempc = a_m_GHAIN;
|
|
|
786 break;
|
|
|
787 case a_i_FEH:
|
|
|
788 tempc = a_m_FEH;
|
|
|
789 break;
|
|
|
790 case a_i_QAF:
|
|
|
791 tempc = a_m_QAF;
|
|
|
792 break;
|
|
|
793 case a_i_KAF:
|
|
|
794 tempc = a_m_KAF;
|
|
|
795 break;
|
|
|
796 case a_i_LAM:
|
|
|
797 tempc = a_m_LAM;
|
|
|
798 break;
|
|
|
799 case a_i_MEEM:
|
|
|
800 tempc = a_m_MEEM;
|
|
|
801 break;
|
|
|
802 case a_i_NOON:
|
|
|
803 tempc = a_m_NOON;
|
|
|
804 break;
|
|
|
805 case a_i_HEH:
|
|
|
806 tempc = a_m_HEH;
|
|
|
807 break;
|
|
|
808 case a_i_YEH:
|
|
|
809 tempc = a_m_YEH;
|
|
|
810 break;
|
|
|
811 default:
|
|
|
812 tempc = 0;
|
|
|
813 }
|
|
|
814
|
|
|
815 return tempc;
|
|
|
816 }
|
|
|
817
|
|
|
818
|
|
|
819 /*
|
|
|
820 * Change shape - from Final to Medial
|
|
|
821 */
|
|
|
822 static int
|
|
|
823 chg_c_f2m(cur_c)
|
|
|
824 int cur_c;
|
|
|
825 {
|
|
|
826 int tempc;
|
|
|
827
|
|
|
828 switch (cur_c)
|
|
|
829 {
|
|
|
830 /* NOTE: these encodings are multi-positional, no ?
|
|
|
831 case a_f_ALEF_MADDA:
|
|
|
832 case a_f_ALEF_HAMZA_ABOVE:
|
|
|
833 case a_f_ALEF_HAMZA_BELOW:
|
|
|
834 */
|
|
|
835 case a_f_YEH_HAMZA:
|
|
|
836 tempc = a_m_YEH_HAMZA;
|
|
|
837 break;
|
|
|
838 case a_f_WAW_HAMZA: /* exceptions */
|
|
|
839 case a_f_ALEF:
|
|
|
840 case a_f_TEH_MARBUTA:
|
|
|
841 case a_f_DAL:
|
|
|
842 case a_f_THAL:
|
|
|
843 case a_f_REH:
|
|
|
844 case a_f_ZAIN:
|
|
|
845 case a_f_WAW:
|
|
|
846 case a_f_ALEF_MAKSURA:
|
|
|
847 tempc = cur_c;
|
|
|
848 break;
|
|
|
849 case a_f_BEH:
|
|
|
850 tempc = a_m_BEH;
|
|
|
851 break;
|
|
|
852 case a_f_TEH:
|
|
|
853 tempc = a_m_TEH;
|
|
|
854 break;
|
|
|
855 case a_f_THEH:
|
|
|
856 tempc = a_m_THEH;
|
|
|
857 break;
|
|
|
858 case a_f_JEEM:
|
|
|
859 tempc = a_m_JEEM;
|
|
|
860 break;
|
|
|
861 case a_f_HAH:
|
|
|
862 tempc = a_m_HAH;
|
|
|
863 break;
|
|
|
864 case a_f_KHAH:
|
|
|
865 tempc = a_m_KHAH;
|
|
|
866 break;
|
|
|
867 case a_f_SEEN:
|
|
|
868 tempc = a_m_SEEN;
|
|
|
869 break;
|
|
|
870 case a_f_SHEEN:
|
|
|
871 tempc = a_m_SHEEN;
|
|
|
872 break;
|
|
|
873 case a_f_SAD:
|
|
|
874 tempc = a_m_SAD;
|
|
|
875 break;
|
|
|
876 case a_f_DAD:
|
|
|
877 tempc = a_m_DAD;
|
|
|
878 break;
|
|
|
879 case a_f_TAH:
|
|
|
880 tempc = a_m_TAH;
|
|
|
881 break;
|
|
|
882 case a_f_ZAH:
|
|
|
883 tempc = a_m_ZAH;
|
|
|
884 break;
|
|
|
885 case a_f_AIN:
|
|
|
886 tempc = a_m_AIN;
|
|
|
887 break;
|
|
|
888 case a_f_GHAIN:
|
|
|
889 tempc = a_m_GHAIN;
|
|
|
890 break;
|
|
|
891 case a_f_FEH:
|
|
|
892 tempc = a_m_FEH;
|
|
|
893 break;
|
|
|
894 case a_f_QAF:
|
|
|
895 tempc = a_m_QAF;
|
|
|
896 break;
|
|
|
897 case a_f_KAF:
|
|
|
898 tempc = a_m_KAF;
|
|
|
899 break;
|
|
|
900 case a_f_LAM:
|
|
|
901 tempc = a_m_LAM;
|
|
|
902 break;
|
|
|
903 case a_f_MEEM:
|
|
|
904 tempc = a_m_MEEM;
|
|
|
905 break;
|
|
|
906 case a_f_NOON:
|
|
|
907 tempc = a_m_NOON;
|
|
|
908 break;
|
|
|
909 case a_f_HEH:
|
|
|
910 tempc = a_m_HEH;
|
|
|
911 break;
|
|
|
912 case a_f_YEH:
|
|
|
913 tempc = a_m_YEH;
|
|
|
914 break;
|
|
|
915 /* NOTE: these encodings are multi-positional, no ?
|
|
|
916 case a_f_LAM_ALEF_MADDA_ABOVE:
|
|
|
917 case a_f_LAM_ALEF_HAMZA_ABOVE:
|
|
|
918 case a_f_LAM_ALEF_HAMZA_BELOW:
|
|
|
919 case a_f_LAM_ALEF:
|
|
|
920 */
|
|
|
921 default:
|
|
|
922 tempc = 0;
|
|
|
923 }
|
|
|
924
|
|
|
925 return tempc;
|
|
|
926 }
|
|
|
927
|
|
|
928
|
|
|
929 /*
|
|
|
930 * Change shape - from Combination (2 char) to an Isolated
|
|
|
931 */
|
|
|
932 static int
|
|
|
933 chg_c_laa2i(hid_c)
|
|
|
934 int hid_c;
|
|
|
935 {
|
|
|
936 int tempc;
|
|
|
937
|
|
|
938 switch (hid_c)
|
|
|
939 {
|
|
|
940 case a_ALEF_MADDA:
|
|
|
941 tempc = a_s_LAM_ALEF_MADDA_ABOVE;
|
|
|
942 break;
|
|
|
943 case a_ALEF_HAMZA_ABOVE:
|
|
|
944 tempc = a_s_LAM_ALEF_HAMZA_ABOVE;
|
|
|
945 break;
|
|
|
946 case a_ALEF_HAMZA_BELOW:
|
|
|
947 tempc = a_s_LAM_ALEF_HAMZA_BELOW;
|
|
|
948 break;
|
|
|
949 case a_ALEF:
|
|
|
950 tempc = a_s_LAM_ALEF;
|
|
|
951 break;
|
|
|
952 default:
|
|
|
953 tempc = 0;
|
|
|
954 }
|
|
|
955
|
|
|
956 return tempc;
|
|
|
957 }
|
|
|
958
|
|
|
959
|
|
|
960 /*
|
|
|
961 * Change shape - from Combination-Isolated to Final
|
|
|
962 */
|
|
|
963 static int
|
|
|
964 chg_c_laa2f(hid_c)
|
|
|
965 int hid_c;
|
|
|
966 {
|
|
|
967 int tempc;
|
|
|
968
|
|
|
969 switch (hid_c)
|
|
|
970 {
|
|
|
971 case a_ALEF_MADDA:
|
|
|
972 tempc = a_f_LAM_ALEF_MADDA_ABOVE;
|
|
|
973 break;
|
|
|
974 case a_ALEF_HAMZA_ABOVE:
|
|
|
975 tempc = a_f_LAM_ALEF_HAMZA_ABOVE;
|
|
|
976 break;
|
|
|
977 case a_ALEF_HAMZA_BELOW:
|
|
|
978 tempc = a_f_LAM_ALEF_HAMZA_BELOW;
|
|
|
979 break;
|
|
|
980 case a_ALEF:
|
|
|
981 tempc = a_f_LAM_ALEF;
|
|
|
982 break;
|
|
|
983 default:
|
|
|
984 tempc = 0;
|
|
|
985 }
|
|
|
986
|
|
|
987 return tempc;
|
|
|
988 }
|
|
|
989
|
|
|
990 /*
|
|
|
991 * Do "half-shaping" on character "c". Return zero if no shaping.
|
|
|
992 */
|
|
|
993 static int
|
|
|
994 half_shape(c)
|
|
|
995 int c;
|
|
|
996 {
|
|
|
997 if (A_is_a(c))
|
|
|
998 return chg_c_a2i(c);
|
|
|
999 if (A_is_valid(c) && A_is_f(c))
|
|
|
1000 return chg_c_f2m(c);
|
|
|
1001 return 0;
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 /*
|
|
|
1005 * Do Arabic shaping on character "c". Returns the shaped character.
|
|
|
1006 * out: "ccp" points to the first byte of the character to be shaped.
|
|
|
1007 * in/out: "c1p" points to the first composing char for "c".
|
|
|
1008 * in: "prev_c" is the previous character (not shaped)
|
|
|
1009 * in: "prev_c1" is the first composing char for the previous char
|
|
|
1010 * (not shaped)
|
|
|
1011 * in: "next_c" is the next character (not shaped).
|
|
|
1012 */
|
|
|
1013 int
|
|
|
1014 arabic_shape(c, ccp, c1p, prev_c, prev_c1, next_c)
|
|
|
1015 int c;
|
|
|
1016 int *ccp;
|
|
|
1017 int *c1p;
|
|
|
1018 int prev_c;
|
|
|
1019 int prev_c1;
|
|
|
1020 int next_c;
|
|
|
1021 {
|
|
|
1022 int curr_c;
|
|
|
1023 int shape_c;
|
|
|
1024 int curr_laa;
|
|
|
1025 int prev_laa;
|
|
|
1026
|
|
|
1027 /* Deal only with Arabic character, pass back all others */
|
|
|
1028 if (!A_is_ok(c))
|
|
|
1029 return c;
|
|
|
1030
|
|
|
1031 /* half-shape current and previous character */
|
|
|
1032 shape_c = half_shape(prev_c);
|
|
|
1033
|
|
|
1034 /* Save away current character */
|
|
|
1035 curr_c = c;
|
|
|
1036
|
|
|
1037 curr_laa = A_firstc_laa(c, *c1p);
|
|
|
1038 prev_laa = A_firstc_laa(prev_c, prev_c1);
|
|
|
1039
|
|
|
1040 if (curr_laa)
|
|
|
1041 {
|
|
|
1042 if (A_is_valid(prev_c) && !A_is_f(shape_c)
|
|
|
1043 && !A_is_s(shape_c) && !prev_laa)
|
|
|
1044 curr_c = chg_c_laa2f(curr_laa);
|
|
|
1045 else
|
|
|
1046 curr_c = chg_c_laa2i(curr_laa);
|
|
|
1047
|
|
|
1048 /* Remove the composing character */
|
|
|
1049 *c1p = 0;
|
|
|
1050 }
|
|
|
1051 else if (!A_is_valid(prev_c) && A_is_valid(next_c))
|
|
|
1052 curr_c = chg_c_a2i(c);
|
|
|
1053 else if (!shape_c || A_is_f(shape_c) || A_is_s(shape_c) || prev_laa)
|
|
|
1054 curr_c = A_is_valid(next_c) ? chg_c_a2i(c) : chg_c_a2s(c);
|
|
|
1055 else if (A_is_valid(next_c))
|
|
|
1056 curr_c = A_is_iso(c) ? chg_c_a2m(c) : chg_c_i2m(c);
|
|
|
1057 else if (A_is_valid(prev_c))
|
|
|
1058 curr_c = chg_c_a2f(c);
|
|
|
1059 else
|
|
|
1060 curr_c = chg_c_a2s(c);
|
|
|
1061
|
|
|
1062 /* Sanity check -- curr_c should, in the future, never be 0.
|
|
|
1063 * We should, in the future, insert a fatal error here. */
|
|
|
1064 if (curr_c == NUL)
|
|
|
1065 curr_c = c;
|
|
|
1066
|
|
|
1067 if (curr_c != c && ccp != NULL)
|
|
|
1068 {
|
|
3549
|
1069 char_u buf[MB_MAXBYTES + 1];
|
|
7
|
1070
|
|
|
1071 /* Update the first byte of the character. */
|
|
|
1072 (*mb_char2bytes)(curr_c, buf);
|
|
|
1073 *ccp = buf[0];
|
|
|
1074 }
|
|
|
1075
|
|
|
1076 /* Return the shaped character */
|
|
|
1077 return curr_c;
|
|
|
1078 }
|
|
|
1079
|
|
|
1080
|
|
|
1081 /*
|
|
|
1082 * A_firstc_laa returns first character of LAA combination if it exists
|
|
|
1083 */
|
|
|
1084 static int
|
|
|
1085 A_firstc_laa(c, c1)
|
|
|
1086 int c; /* base character */
|
|
|
1087 int c1; /* first composing character */
|
|
|
1088 {
|
|
|
1089 if (c1 != NUL && c == a_LAM && !A_is_harakat(c1))
|
|
|
1090 return c1;
|
|
|
1091 return 0;
|
|
|
1092 }
|
|
|
1093
|
|
|
1094
|
|
|
1095 /*
|
|
|
1096 * A_is_harakat returns TRUE if 'c' is an Arabic Harakat character
|
|
|
1097 * (harakat/tanween)
|
|
|
1098 */
|
|
|
1099 static int
|
|
|
1100 A_is_harakat(c)
|
|
|
1101 int c;
|
|
|
1102 {
|
|
|
1103 return (c >= a_FATHATAN && c <= a_SUKUN);
|
|
|
1104 }
|
|
|
1105
|
|
|
1106
|
|
|
1107 /*
|
|
|
1108 * A_is_iso returns TRUE if 'c' is an Arabic ISO-8859-6 character
|
|
|
1109 * (alphabet/number/punctuation)
|
|
|
1110 */
|
|
|
1111 static int
|
|
|
1112 A_is_iso(c)
|
|
|
1113 int c;
|
|
|
1114 {
|
|
|
1115 return ((c >= a_HAMZA && c <= a_GHAIN)
|
|
|
1116 || (c >= a_TATWEEL && c <= a_HAMZA_BELOW)
|
|
|
1117 || c == a_MINI_ALEF);
|
|
|
1118 }
|
|
|
1119
|
|
|
1120
|
|
|
1121 /*
|
|
|
1122 * A_is_formb returns TRUE if 'c' is an Arabic 10646-1 FormB character
|
|
|
1123 * (alphabet/number/punctuation)
|
|
|
1124 */
|
|
|
1125 static int
|
|
|
1126 A_is_formb(c)
|
|
|
1127 int c;
|
|
|
1128 {
|
|
|
1129 return ((c >= a_s_FATHATAN && c <= a_s_DAMMATAN)
|
|
|
1130 || c == a_s_KASRATAN
|
|
|
1131 || (c >= a_s_FATHA && c <= a_f_LAM_ALEF)
|
|
|
1132 || c == a_BYTE_ORDER_MARK);
|
|
|
1133 }
|
|
|
1134
|
|
|
1135
|
|
|
1136 /*
|
|
|
1137 * A_is_ok returns TRUE if 'c' is an Arabic 10646 (8859-6 or Form-B)
|
|
|
1138 */
|
|
|
1139 static int
|
|
|
1140 A_is_ok(c)
|
|
|
1141 int c;
|
|
|
1142 {
|
|
|
1143 return (A_is_iso(c) || A_is_formb(c));
|
|
|
1144 }
|
|
|
1145
|
|
|
1146
|
|
|
1147 /*
|
|
|
1148 * A_is_valid returns TRUE if 'c' is an Arabic 10646 (8859-6 or Form-B)
|
|
|
1149 * with some exceptions/exclusions
|
|
|
1150 */
|
|
|
1151 static int
|
|
|
1152 A_is_valid(c)
|
|
|
1153 int c;
|
|
|
1154 {
|
|
|
1155 return (A_is_ok(c) && !A_is_special(c));
|
|
|
1156 }
|
|
|
1157
|
|
|
1158
|
|
|
1159 /*
|
|
|
1160 * A_is_special returns TRUE if 'c' is not a special Arabic character.
|
|
|
1161 * Specials don't adhere to most of the rules.
|
|
|
1162 */
|
|
|
1163 static int
|
|
|
1164 A_is_special(c)
|
|
|
1165 int c;
|
|
|
1166 {
|
|
|
1167 return (c == a_HAMZA || c == a_s_HAMZA);
|
|
|
1168 }
|
