1 | ; Project name : Assembly Library |
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2 | ; Description : Functions for handling characters. |
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3 | |
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4 | ; |
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5 | ; XTIDE Universal BIOS and Associated Tools |
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6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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7 | ; |
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8 | ; This program is free software; you can redistribute it and/or modify |
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9 | ; it under the terms of the GNU General Public License as published by |
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10 | ; the Free Software Foundation; either version 2 of the License, or |
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11 | ; (at your option) any later version. |
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12 | ; |
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13 | ; This program is distributed in the hope that it will be useful, |
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14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | ; GNU General Public License for more details. |
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17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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18 | ; |
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19 | |
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20 | ; Section containing code |
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21 | SECTION .text |
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22 | |
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23 | ;-------------------------------------------------------------------- |
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24 | ; This macro can only be used within this source file!!! |
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25 | ; IS_BETWEEN_IMMEDIATES |
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26 | ; Parameters: |
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27 | ; %1: Value to check |
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28 | ; %2: First accepted value in range |
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29 | ; %3: Last accepted value in range |
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30 | ; Returns: |
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31 | ; CF: Set if character in range |
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32 | ; (Jumps to Char_CharIsNotValid if before range) |
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33 | ; Corrupts registers: |
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34 | ; Nothing |
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35 | ;-------------------------------------------------------------------- |
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36 | %macro IS_BETWEEN_IMMEDIATES 3 |
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37 | cmp %1, %2 |
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38 | jb SHORT Char_CharIsNotValid |
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39 | cmp %1, (%3)+1 ; Set CF if %1 is lesser |
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40 | %endmacro |
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41 | |
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42 | |
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43 | ;-------------------------------------------------------------------- |
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44 | ; Char_IsLowerCaseLetterInAL |
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45 | ; Parameters: |
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46 | ; AL: Character to check |
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47 | ; Returns: |
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48 | ; CF: Set if character is lower case letter ('a'...'z') |
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49 | ; Cleared if character is not lower case letter |
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50 | ; Corrupts registers: |
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51 | ; Nothing |
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52 | ;-------------------------------------------------------------------- |
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53 | %ifdef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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54 | %ifndef MODULE_HOTKEYS |
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55 | %define EXCLUDE |
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56 | %endif |
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57 | %endif |
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58 | |
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59 | %ifndef EXCLUDE |
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60 | ALIGN STRING_JUMP_ALIGN |
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61 | Char_IsLowerCaseLetterInAL: |
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62 | IS_BETWEEN_IMMEDIATES al, 'a', 'z' |
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63 | ret |
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64 | %endif |
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65 | %undef EXCLUDE |
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66 | |
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67 | |
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68 | ;-------------------------------------------------------------------- |
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69 | ; Char_IsUpperCaseLetterInAL |
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70 | ; Parameters: |
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71 | ; AL: Character to check |
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72 | ; Returns: |
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73 | ; CF: Set if character is upper case letter ('A'...'Z') |
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74 | ; Cleared if character is not upper case letter |
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75 | ; Corrupts registers: |
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76 | ; Nothing |
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77 | ;-------------------------------------------------------------------- |
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78 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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79 | ALIGN STRING_JUMP_ALIGN |
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80 | Char_IsUpperCaseLetterInAL: |
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81 | IS_BETWEEN_IMMEDIATES al, 'A', 'Z' |
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82 | ret |
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83 | %endif |
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84 | |
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85 | |
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86 | ;-------------------------------------------------------------------- |
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87 | ; Char_IsHexadecimalDigitInAL |
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88 | ; Parameters: |
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89 | ; AL: Character to check |
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90 | ; Returns: |
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91 | ; AL: Character converted to lower case |
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92 | ; CF: Set if character is decimal digit ('0'...'F') |
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93 | ; Cleared if character is not decimal digit |
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94 | ; Corrupts registers: |
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95 | ; Nothing |
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96 | ;-------------------------------------------------------------------- |
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97 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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98 | ALIGN STRING_JUMP_ALIGN |
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99 | Char_IsHexadecimalDigitInAL: |
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100 | call Char_IsDecimalDigitInAL |
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101 | jc SHORT Char_CharIsValid |
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102 | call Char_ALtoLowerCaseLetter |
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103 | IS_BETWEEN_IMMEDIATES al, 'a', 'f' |
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104 | ret |
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105 | %endif |
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106 | |
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107 | |
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108 | ;-------------------------------------------------------------------- |
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109 | ; Char_IsDecimalDigitInAL |
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110 | ; Parameters: |
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111 | ; AL: Character to check |
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112 | ; Returns: |
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113 | ; CF: Set if character is decimal digit ('0'...'9') |
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114 | ; Cleared if character is not decimal digit |
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115 | ; Corrupts registers: |
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116 | ; Nothing |
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117 | ;-------------------------------------------------------------------- |
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118 | %ifndef MODULE_STRINGS_COMPRESSED |
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119 | ALIGN STRING_JUMP_ALIGN |
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120 | Char_IsDecimalDigitInAL: |
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121 | IS_BETWEEN_IMMEDIATES al, '0', '9' |
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122 | ret |
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123 | %endif |
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124 | |
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125 | |
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126 | ;-------------------------------------------------------------------- |
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127 | ; Char_ConvertIntegerToALfromDigitInALwithBaseInBX |
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128 | ; Parameters: |
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129 | ; AL: Character to convert |
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130 | ; BX: Numeric base (10 or 16) |
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131 | ; Returns: |
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132 | ; AL: Character converted to integer |
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133 | ; CF: Set if character was valid |
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134 | ; Cleared if character was invalid |
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135 | ; Corrupts registers: |
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136 | ; Nothing |
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137 | ;-------------------------------------------------------------------- |
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138 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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139 | ALIGN STRING_JUMP_ALIGN |
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140 | Char_ConvertIntegerToALfromDigitInALwithBaseInBX: |
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141 | push dx |
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142 | call Char_GetFilterFunctionToDXforNumericBaseInBX |
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143 | call dx ; Converts to lower case |
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144 | pop dx |
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145 | jnc SHORT Char_CharIsNotValid |
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146 | |
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147 | cmp al, '9' ; Decimal digit |
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148 | jbe SHORT .ConvertToDecimalDigit |
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149 | sub al, 'a'-'0'-10 ; Convert to hexadecimal integer |
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150 | ALIGN STRING_JUMP_ALIGN |
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151 | .ConvertToDecimalDigit: |
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152 | sub al, '0' ; Convert to decimal integer |
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153 | ; Fall to Char_CharIsValid |
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154 | %endif |
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155 | |
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156 | |
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157 | ;-------------------------------------------------------------------- |
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158 | ; Char_CharIsValid |
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159 | ; Char_CharIsNotValid |
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160 | ; Parameters: |
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161 | ; Nothing |
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162 | ; Returns: |
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163 | ; CF: Set for Char_CharIsValid |
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164 | ; Cleared for Char_CharIsNotValid |
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165 | ; Corrupts registers: |
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166 | ; Nothing |
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167 | ;-------------------------------------------------------------------- |
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168 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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169 | ALIGN STRING_JUMP_ALIGN |
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170 | Char_CharIsValid: |
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171 | stc |
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172 | ret |
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173 | %endif |
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174 | |
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175 | |
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176 | %ifdef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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177 | %ifndef MODULE_HOTKEYS |
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178 | %define EXCLUDE |
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179 | %endif |
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180 | %ifndef MODULE_STRINGS_COMPRESSED |
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181 | %undef EXCLUDE |
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182 | %endif |
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183 | %endif |
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184 | |
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185 | %ifndef EXCLUDE |
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186 | ALIGN STRING_JUMP_ALIGN |
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187 | Char_CharIsNotValid: |
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188 | clc |
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189 | ret |
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190 | %endif |
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191 | %undef EXCLUDE |
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192 | |
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193 | |
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194 | ;-------------------------------------------------------------------- |
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195 | ; Char_ALtoLowerCaseLetter |
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196 | ; Parameters: |
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197 | ; AL: Character to convert |
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198 | ; Returns: |
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199 | ; AL: Character with possible conversion |
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200 | ; Corrupts registers: |
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201 | ; Nothing |
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202 | ;-------------------------------------------------------------------- |
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203 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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204 | ALIGN STRING_JUMP_ALIGN |
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205 | Char_ALtoLowerCaseLetter: |
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206 | call Char_IsUpperCaseLetterInAL ; Is upper case character? |
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207 | jmp SHORT Char_ALtoUpperCaseLetter.CheckCF |
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208 | %endif |
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209 | |
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210 | |
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211 | ;-------------------------------------------------------------------- |
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212 | ; Char_ALtoUpperCaseLetter |
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213 | ; Parameters: |
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214 | ; AL: Character to convert |
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215 | ; Returns: |
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216 | ; AL: Character with possible conversion |
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217 | ; Corrupts registers: |
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218 | ; Nothing |
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219 | ;-------------------------------------------------------------------- |
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220 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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221 | ALIGN STRING_JUMP_ALIGN |
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222 | Char_ALtoUpperCaseLetter: |
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223 | call Char_IsLowerCaseLetterInAL ; Is lower case character? |
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224 | .CheckCF: |
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225 | jnc SHORT Char_ChangeCaseInAL.Return |
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226 | ; Fall to Char_ChangeCaseInAL |
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227 | %endif |
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228 | |
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229 | |
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230 | ;-------------------------------------------------------------------- |
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231 | ; Char_ChangeCaseInAL |
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232 | ; Parameters: |
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233 | ; AL: Character to convert (must be A-Z or a-z) |
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234 | ; Returns: |
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235 | ; AL: Character converted |
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236 | ; Corrupts registers: |
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237 | ; Nothing |
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238 | ;-------------------------------------------------------------------- |
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239 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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240 | Char_ChangeCaseInAL: |
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241 | xor al, 32 |
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242 | .Return: |
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243 | ret |
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244 | %endif |
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245 | |
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246 | |
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247 | ;-------------------------------------------------------------------- |
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248 | ; Char_GetFilterFunctionToDXforNumericBaseInBX |
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249 | ; Parameters |
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250 | ; BX: Numeric base (10 or 16) |
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251 | ; Returns: |
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252 | ; CS:DX: Ptr to character filter function |
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253 | ; Corrupts registers: |
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254 | ; Nothing |
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255 | ;-------------------------------------------------------------------- |
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256 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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257 | ALIGN STRING_JUMP_ALIGN |
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258 | Char_GetFilterFunctionToDXforNumericBaseInBX: |
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259 | mov dx, Char_IsDecimalDigitInAL |
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260 | cmp bl, 10 |
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261 | je SHORT .Return |
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262 | mov dx, Char_IsHexadecimalDigitInAL |
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263 | .Return: |
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264 | ret |
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265 | %endif |
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