[41] | 1 | ; Project name : Assembly Library |
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| 2 | ; Description : Functions for handling characters. |
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| 3 | |
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[376] | 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 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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[41] | 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 is range |
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[162] | 32 | ; (Jumps to Char_CharIsNotValid if before range) |
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[41] | 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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[162] | 38 | jb SHORT Char_CharIsNotValid |
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[41] | 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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[369] | 53 | ALIGN STRING_JUMP_ALIGN |
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[41] | 54 | Char_IsLowerCaseLetterInAL: |
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| 55 | IS_BETWEEN_IMMEDIATES al, 'a', 'z' |
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| 56 | ret |
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| 57 | |
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| 58 | ;-------------------------------------------------------------------- |
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| 59 | ; Char_IsUpperCaseLetterInAL |
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| 60 | ; Parameters: |
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| 61 | ; AL: Character to check |
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| 62 | ; Returns: |
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| 63 | ; CF: Set if character is upper case letter ('A'...'Z') |
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| 64 | ; Cleared if character is not upper case letter |
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| 65 | ; Corrupts registers: |
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| 66 | ; Nothing |
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| 67 | ;-------------------------------------------------------------------- |
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[162] | 68 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 69 | ALIGN STRING_JUMP_ALIGN |
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[41] | 70 | Char_IsUpperCaseLetterInAL: |
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| 71 | IS_BETWEEN_IMMEDIATES al, 'A', 'Z' |
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| 72 | ret |
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[162] | 73 | %endif |
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[41] | 74 | |
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| 75 | ;-------------------------------------------------------------------- |
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| 76 | ; Char_IsHexadecimalDigitInAL |
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| 77 | ; Parameters: |
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| 78 | ; AL: Character to check |
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| 79 | ; Returns: |
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| 80 | ; AL: Character converted to lower case |
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| 81 | ; CF: Set if character is decimal digit ('0'...'F') |
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| 82 | ; Cleared if character is not decimal digit |
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| 83 | ; Corrupts registers: |
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| 84 | ; Nothing |
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| 85 | ;-------------------------------------------------------------------- |
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[162] | 86 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 87 | ALIGN STRING_JUMP_ALIGN |
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[41] | 88 | Char_IsHexadecimalDigitInAL: |
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| 89 | call Char_IsDecimalDigitInAL |
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| 90 | jc SHORT Char_CharIsValid |
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| 91 | call Char_ALtoLowerCaseLetter |
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| 92 | IS_BETWEEN_IMMEDIATES al, 'a', 'f' |
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| 93 | ret |
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[162] | 94 | %endif |
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[41] | 95 | |
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| 96 | ;-------------------------------------------------------------------- |
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| 97 | ; Char_IsDecimalDigitInAL |
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| 98 | ; Parameters: |
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| 99 | ; AL: Character to check |
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| 100 | ; Returns: |
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| 101 | ; CF: Set if character is decimal digit ('0'...'9') |
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| 102 | ; Cleared if character is not decimal digit |
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| 103 | ; Corrupts registers: |
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| 104 | ; Nothing |
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| 105 | ;-------------------------------------------------------------------- |
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[201] | 106 | %ifndef MODULE_STRINGS_COMPRESSED |
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[369] | 107 | ALIGN STRING_JUMP_ALIGN |
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[41] | 108 | Char_IsDecimalDigitInAL: |
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| 109 | IS_BETWEEN_IMMEDIATES al, '0', '9' |
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| 110 | ret |
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[194] | 111 | %endif |
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[41] | 112 | |
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| 113 | ;-------------------------------------------------------------------- |
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| 114 | ; Char_ConvertIntegerToALfromDigitInALwithBaseInBX |
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| 115 | ; Parameters: |
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| 116 | ; AL: Character to convert |
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| 117 | ; BX: Numeric base (10 or 16) |
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| 118 | ; Returns: |
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| 119 | ; AL: Character converted to integer |
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| 120 | ; CF: Set if character was valid |
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| 121 | ; Cleared if character was invalid |
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| 122 | ; Corrupts registers: |
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| 123 | ; Nothing |
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| 124 | ;-------------------------------------------------------------------- |
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[162] | 125 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 126 | ALIGN STRING_JUMP_ALIGN |
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[41] | 127 | Char_ConvertIntegerToALfromDigitInALwithBaseInBX: |
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| 128 | push dx |
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| 129 | call Char_GetFilterFunctionToDXforNumericBaseInBX |
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| 130 | call dx ; Converts to lower case |
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| 131 | pop dx |
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[162] | 132 | jnc SHORT Char_CharIsNotValid |
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[41] | 133 | |
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| 134 | cmp al, '9' ; Decimal digit |
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| 135 | jbe SHORT .ConvertToDecimalDigit |
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[145] | 136 | sub al, 'a'-'0'-10 ; Convert to hexadecimal integer |
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[369] | 137 | ALIGN STRING_JUMP_ALIGN |
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[41] | 138 | .ConvertToDecimalDigit: |
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| 139 | sub al, '0' ; Convert to decimal integer |
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[162] | 140 | ; Fall to Char_CharIsValid |
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| 141 | %endif |
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[41] | 142 | |
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| 143 | ;-------------------------------------------------------------------- |
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[162] | 144 | ; Char_CharIsValid |
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| 145 | ; Char_CharIsNotValid |
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[41] | 146 | ; Parameters: |
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| 147 | ; Nothing |
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| 148 | ; Returns: |
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[162] | 149 | ; CF: Set for Char_CharIsValid |
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| 150 | ; Cleared for Char_CharIsNotValid |
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[41] | 151 | ; Corrupts registers: |
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| 152 | ; Nothing |
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| 153 | ;-------------------------------------------------------------------- |
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[162] | 154 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 155 | ALIGN STRING_JUMP_ALIGN |
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[41] | 156 | Char_CharIsValid: |
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| 157 | stc |
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| 158 | ret |
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[162] | 159 | %endif |
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[41] | 160 | |
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[369] | 161 | ALIGN STRING_JUMP_ALIGN |
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[162] | 162 | Char_CharIsNotValid: |
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[41] | 163 | clc |
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| 164 | ret |
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| 165 | |
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| 166 | |
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| 167 | ;-------------------------------------------------------------------- |
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| 168 | ; Char_ALtoLowerCaseLetter |
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| 169 | ; Parameters: |
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| 170 | ; AL: Character to convert |
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| 171 | ; Returns: |
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| 172 | ; AL: Character with possible conversion |
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| 173 | ; Corrupts registers: |
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| 174 | ; Nothing |
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| 175 | ;-------------------------------------------------------------------- |
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[162] | 176 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 177 | ALIGN STRING_JUMP_ALIGN |
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[41] | 178 | Char_ALtoLowerCaseLetter: |
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| 179 | call Char_IsUpperCaseLetterInAL ; Is upper case character? |
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[181] | 180 | jmp SHORT Char_ALtoUpperCaseLetter.CheckCF |
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[162] | 181 | %endif |
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[41] | 182 | |
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[489] | 183 | |
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[41] | 184 | ;-------------------------------------------------------------------- |
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| 185 | ; Char_ALtoUpperCaseLetter |
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| 186 | ; Parameters: |
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| 187 | ; AL: Character to convert |
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| 188 | ; Returns: |
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| 189 | ; AL: Character with possible conversion |
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| 190 | ; Corrupts registers: |
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| 191 | ; Nothing |
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| 192 | ;-------------------------------------------------------------------- |
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[489] | 193 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 194 | ALIGN STRING_JUMP_ALIGN |
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[41] | 195 | Char_ALtoUpperCaseLetter: |
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| 196 | call Char_IsLowerCaseLetterInAL ; Is lower case character? |
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[181] | 197 | .CheckCF: |
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| 198 | jnc SHORT Char_ChangeCaseInAL.Return |
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| 199 | ; Fall to Char_ChangeCaseInAL |
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[489] | 200 | %endif |
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[181] | 201 | |
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[489] | 202 | |
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[181] | 203 | ;-------------------------------------------------------------------- |
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| 204 | ; Char_ChangeCaseInAL |
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| 205 | ; Parameters: |
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| 206 | ; AL: Character to convert (must be A-Z or a-z) |
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| 207 | ; Returns: |
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| 208 | ; AL: Character converted |
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| 209 | ; Corrupts registers: |
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| 210 | ; Nothing |
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| 211 | ;-------------------------------------------------------------------- |
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| 212 | Char_ChangeCaseInAL: |
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| 213 | xor al, 32 |
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[41] | 214 | .Return: |
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| 215 | ret |
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| 216 | |
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| 217 | ;-------------------------------------------------------------------- |
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| 218 | ; Char_GetFilterFunctionToDXforNumericBaseInBX |
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| 219 | ; Parameters |
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| 220 | ; BX: Numeric base (10 or 16) |
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| 221 | ; Returns: |
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| 222 | ; CS:DX: Ptr to character filter function |
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| 223 | ; Corrupts registers: |
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| 224 | ; Nothing |
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| 225 | ;-------------------------------------------------------------------- |
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[162] | 226 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
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[369] | 227 | ALIGN STRING_JUMP_ALIGN |
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[41] | 228 | Char_GetFilterFunctionToDXforNumericBaseInBX: |
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| 229 | mov dx, Char_IsDecimalDigitInAL |
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| 230 | cmp bl, 10 |
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| 231 | je SHORT .Return |
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[162] | 232 | mov dx, Char_IsHexadecimalDigitInAL |
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[41] | 233 | .Return: |
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| 234 | ret |
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[162] | 235 | %endif |
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