1 | ; Project name : XTIDE Universal BIOS Configurator |
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2 | ; Description : Functions to access MENUPAGE structs. |
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3 | |
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4 | ; Section containing code |
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5 | SECTION .text |
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6 | |
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7 | ;-------------------------------------------------------------------- |
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8 | ; Returns number of visible menuitems in MENUPAGE. |
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9 | ; |
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10 | ; MenuPage_GetNumberOfVisibleItems |
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11 | ; Parameters: |
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12 | ; DS:SI: Ptr to MENUPAGE |
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13 | ; Returns: |
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14 | ; AX: Number of visible menuitems |
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15 | ; Corrupts registers: |
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16 | ; DI |
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17 | ;-------------------------------------------------------------------- |
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18 | ALIGN JUMP_ALIGN |
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19 | MenuPage_GetNumberOfVisibleItems: |
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20 | xor ax, ax ; Zero visible menuitems |
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21 | mov di, MenuPage_IterateForNumberOfVisibleItems |
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22 | jmp SHORT MenuPage_IterateMenuPageItems |
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23 | |
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24 | ;-------------------------------------------------------------------- |
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25 | ; Iteration callback function for MenuPage_GetNumberOfVisibleItems. |
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26 | ; |
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27 | ; MenuPage_IterateForNumberOfVisibleItems |
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28 | ; Parameters: |
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29 | ; AX: Number of visible menuitems found so far |
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30 | ; DS:BX: Ptr to MENUPAGEITEM to examine |
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31 | ; Returns: |
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32 | ; AX: Number of visible menuitems found so far |
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33 | ; CF: Cleared to continue iteration |
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34 | ; Corrupts registers: |
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35 | ; Nothing |
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36 | ;-------------------------------------------------------------------- |
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37 | ALIGN JUMP_ALIGN |
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38 | MenuPage_IterateForNumberOfVisibleItems: |
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39 | test BYTE [bx+MENUPAGEITEM.bFlags], FLG_MENUPAGEITEM_VISIBLE ; Clears CF |
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40 | jz SHORT .NextItem |
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41 | inc ax ; Increment visible menuitems |
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42 | ALIGN JUMP_ALIGN |
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43 | .NextItem: |
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44 | ret |
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45 | |
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46 | |
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47 | ;-------------------------------------------------------------------- |
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48 | ; Returns pointer to MENUPAGEITEM for visible index (menu library index). |
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49 | ; |
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50 | ; MenuPage_GetMenuPageItemForVisibleIndex |
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51 | ; Parameters: |
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52 | ; CX: Index of visible menuitem |
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53 | ; DS:SI: Ptr to MENUPAGE |
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54 | ; Returns: |
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55 | ; DS:DI: Ptr to MENUPAGEITEM |
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56 | ; CF: Set if MENUPAGEITEM was found |
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57 | ; Corrupts registers: |
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58 | ; AX |
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59 | ;-------------------------------------------------------------------- |
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60 | ALIGN JUMP_ALIGN |
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61 | MenuPage_GetMenuPageItemForVisibleIndex: |
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62 | mov ax, cx ; Menuitem index to menuitems to skip |
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63 | mov di, MenuPage_IterateForVisibleIndex |
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64 | jmp SHORT MenuPage_IterateMenuPageItems |
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65 | |
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66 | ;-------------------------------------------------------------------- |
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67 | ; Iteration callback function for MenuPage_GetMenuPageItemForVisibleIndex. |
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68 | ; |
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69 | ; MenuPage_IterateForVisibleIndex |
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70 | ; Parameters: |
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71 | ; AX: Number of visible menuitems left to skip |
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72 | ; DS:BX: Ptr to MENUPAGEITEM to examine |
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73 | ; Returns: |
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74 | ; AX: Number of visible menuitems left to skip |
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75 | ; CF: Cleared to continue iteration |
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76 | ; Set if correct MENUPAGEITEM was found |
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77 | ; Corrupts registers: |
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78 | ; Nothing |
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79 | ;-------------------------------------------------------------------- |
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80 | ALIGN JUMP_ALIGN |
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81 | MenuPage_IterateForVisibleIndex: |
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82 | test BYTE [bx+MENUPAGEITEM.bFlags], FLG_MENUPAGEITEM_VISIBLE ; Clears CF |
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83 | jz SHORT .NextItem |
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84 | sub ax, BYTE 1 ; Set CF if correct MENUITEM found |
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85 | ALIGN JUMP_ALIGN |
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86 | .NextItem: |
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87 | ret |
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88 | |
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89 | |
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90 | ;-------------------------------------------------------------------- |
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91 | ; Iterates MENUPAGEITEMs until terminated by callback function or |
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92 | ; all MENUPAGEITEMs have been iterated. |
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93 | ; |
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94 | ; MenuPage_IterateMenuPageItems |
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95 | ; Parameters: |
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96 | ; AX,DX: Parameters to callback function |
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97 | ; DI: Offset to iteration callback function |
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98 | ; DS:SI: Ptr to MENUPAGE |
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99 | ; Returns: |
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100 | ; AX,DX: Return values from callback function |
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101 | ; DS:DI: Ptr to MENUPAGEITEM (only if CF set) |
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102 | ; CF: Cleared if terminated by end of menuitems |
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103 | ; Set if terminated by callback function |
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104 | ; Corrupts registers: |
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105 | ; Nothing, unless corrupted by callback function |
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106 | ;-------------------------------------------------------------------- |
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107 | ALIGN JUMP_ALIGN |
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108 | MenuPage_IterateMenuPageItems: |
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109 | push cx |
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110 | push bx |
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111 | eMOVZX cx, [si+MENUPAGE.bItemCnt] |
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112 | lea bx, [si+MENUPAGE.rgMenuPageItem] |
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113 | ALIGN JUMP_ALIGN |
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114 | .IterationLoop: |
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115 | call di ; Callback function |
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116 | jc SHORT .IterationComplete ; CF set, end iteration |
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117 | add bx, BYTE MENUPAGEITEM_size |
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118 | loop .IterationLoop |
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119 | clc ; Clear CF since end of MENUITEMs |
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120 | ALIGN JUMP_ALIGN |
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121 | .IterationComplete: |
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122 | mov di, bx ; DS:DI points to MENUPAGEITEM |
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123 | pop bx |
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124 | pop cx |
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125 | ret |
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126 | |
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127 | |
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128 | ;-------------------------------------------------------------------- |
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129 | ; Updates number of menuitems and redraws them. |
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130 | ; |
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131 | ; MenuPage_InvalidateItemCount |
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132 | ; Parameters: |
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133 | ; DS:SI: Ptr to MENUPAGE |
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134 | ; Returns: |
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135 | ; Nothing |
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136 | ; Corrupts registers: |
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137 | ; AX, BX, CX, DX |
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138 | ;-------------------------------------------------------------------- |
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139 | ALIGN JUMP_ALIGN |
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140 | MenuPage_InvalidateItemCount: |
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141 | push di |
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142 | call MenuPage_GetNumberOfVisibleItems |
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143 | mov cx, ax |
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144 | mov dl, MFL_UPD_ITEM | MFL_UPD_NFO |
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145 | call Menu_InvItemCnt |
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146 | pop di |
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147 | ret |
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