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1 -- CC3019B0.ADA
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2
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 -- THIS IS GENERIC PACKAGE WHICH IS USED TO CHECK THE LEVEL OF
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26 -- NESTED GENERICS SUPPORTED BY AN IMPLEMENTATION.
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27 --
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28 -- HISTORY:
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29 -- EDWARD V. BERARD, 31 AUGUST 1990
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30
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31 GENERIC
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32
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33 TYPE ELEMENT IS LIMITED PRIVATE ;
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34
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35 WITH PROCEDURE ASSIGN (SOURCE : IN OUT ELEMENT ;
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36 DESTINATION : IN OUT ELEMENT) ;
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37
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38 WITH FUNCTION "=" (LEFT : IN ELEMENT ;
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39 RIGHT : IN ELEMENT) RETURN BOOLEAN ;
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40
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41 PACKAGE CC3019B0_LIST_CLASS IS
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42
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43 TYPE LIST IS LIMITED PRIVATE ;
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44
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45 OVERFLOW : EXCEPTION ;
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46 UNDERFLOW : EXCEPTION ;
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47
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48 PROCEDURE ADD (THIS_ELEMENT : IN OUT ELEMENT ;
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49 TO_THIS_LIST : IN OUT LIST) ;
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50
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51 PROCEDURE DELETE (THIS_ELEMENT : IN OUT ELEMENT ;
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52 FROM_THIS_LIST : IN OUT LIST) ;
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53
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54 PROCEDURE COPY (THIS_LIST : IN OUT LIST ;
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55 TO_THIS_LIST : IN OUT LIST) ;
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56
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57 PROCEDURE CLEAR (THIS_LIST : IN OUT LIST) ;
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58
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59 GENERIC
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60
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61 WITH PROCEDURE PROCESS (THIS_ELEMENT : IN ELEMENT ;
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62 CONTINUE : OUT BOOLEAN) ;
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63
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64 PROCEDURE ITERATE (OVER_THIS_LIST : IN LIST) ;
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65
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66 FUNCTION NUMBER_OF_ELEMENTS (IN_THIS_LIST : IN LIST)
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67 RETURN NATURAL ;
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68
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69 FUNCTION "=" (LEFT : IN LIST ;
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70 RIGHT : IN LIST) RETURN BOOLEAN ;
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71
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72 PRIVATE
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73
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74 TYPE LIST_TABLE IS ARRAY (POSITIVE RANGE 1 .. 10) OF ELEMENT ;
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75
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76 TYPE LIST IS RECORD
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77 LENGTH : NATURAL := 0 ;
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78 ACTUAL_LIST : LIST_TABLE ;
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79 END RECORD ;
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80
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81 END CC3019B0_LIST_CLASS ;
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82
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83 PACKAGE BODY CC3019B0_LIST_CLASS IS
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84
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85 PROCEDURE ADD (THIS_ELEMENT : IN OUT ELEMENT ;
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86 TO_THIS_LIST : IN OUT LIST) IS
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87
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88 BEGIN -- ADD
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89
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90 IF TO_THIS_LIST.LENGTH >= 10 THEN
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91 RAISE OVERFLOW ;
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92 ELSE
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93 TO_THIS_LIST.LENGTH := TO_THIS_LIST.LENGTH + 1 ;
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94 ASSIGN (
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95 SOURCE => THIS_ELEMENT,
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96 DESTINATION =>
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97 TO_THIS_LIST.ACTUAL_LIST (TO_THIS_LIST.LENGTH));
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98 END IF ;
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99
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100 END ADD ;
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101
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102 PROCEDURE DELETE (THIS_ELEMENT : IN OUT ELEMENT ;
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103 FROM_THIS_LIST : IN OUT LIST) IS
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104
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105 BEGIN -- DELETE
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106
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107 IF FROM_THIS_LIST.LENGTH <= 0 THEN
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108 RAISE UNDERFLOW ;
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109 ELSE
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110 ASSIGN (
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111 SOURCE =>
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112 FROM_THIS_LIST.ACTUAL_LIST(FROM_THIS_LIST.LENGTH),
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113 DESTINATION => THIS_ELEMENT) ;
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114 FROM_THIS_LIST.LENGTH := FROM_THIS_LIST.LENGTH - 1 ;
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115 END IF ;
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116
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117 END DELETE ;
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118
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119 PROCEDURE COPY (THIS_LIST : IN OUT LIST ;
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120 TO_THIS_LIST : IN OUT LIST) IS
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121
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122 BEGIN -- COPY
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123
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124 TO_THIS_LIST.LENGTH := THIS_LIST.LENGTH ;
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125 FOR INDEX IN TO_THIS_LIST.ACTUAL_LIST'RANGE LOOP
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126 ASSIGN (
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127 SOURCE => THIS_LIST.ACTUAL_LIST (INDEX),
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128 DESTINATION => TO_THIS_LIST.ACTUAL_LIST (INDEX)) ;
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129 END LOOP ;
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130
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131 END COPY ;
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132
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133 PROCEDURE CLEAR (THIS_LIST : IN OUT LIST) IS
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134
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135 BEGIN -- CLEAR
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136
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137 THIS_LIST.LENGTH := 0 ;
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138
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139 END CLEAR ;
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140
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141 PROCEDURE ITERATE (OVER_THIS_LIST : IN LIST) IS
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142
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143 CONTINUE : BOOLEAN := TRUE ;
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144 FINISHED : NATURAL := 0 ;
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145
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146 BEGIN -- ITERATE
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147
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148 WHILE (CONTINUE = TRUE) AND (FINISHED < OVER_THIS_LIST.LENGTH)
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149 LOOP
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150 FINISHED := FINISHED + 1 ;
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151 PROCESS (THIS_ELEMENT =>
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152 OVER_THIS_LIST.ACTUAL_LIST (FINISHED),
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153 CONTINUE => CONTINUE) ;
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154 END LOOP ;
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155
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156 END ITERATE ;
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157
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158 FUNCTION NUMBER_OF_ELEMENTS (IN_THIS_LIST : IN LIST)
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159 RETURN NATURAL IS
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160
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161 BEGIN -- NUMBER_OF_ELEMENTS
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162
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163 RETURN IN_THIS_LIST.LENGTH ;
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164
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165 END NUMBER_OF_ELEMENTS ;
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166
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167 FUNCTION "=" (LEFT : IN LIST ;
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168 RIGHT : IN LIST) RETURN BOOLEAN IS
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169
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170 RESULT : BOOLEAN := TRUE ;
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171 INDEX : NATURAL := 0 ;
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172
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173 BEGIN -- "="
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174
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175 IF LEFT.LENGTH /= RIGHT.LENGTH THEN
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176 RESULT := FALSE ;
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177 ELSE
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178 WHILE (INDEX < LEFT.LENGTH) AND RESULT LOOP
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179 INDEX := INDEX + 1 ;
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180 IF LEFT.ACTUAL_LIST (INDEX) /=
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181 RIGHT.ACTUAL_LIST (INDEX) THEN
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182 RESULT := FALSE ;
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183 END IF ;
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184 END LOOP ;
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185 END IF ;
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186
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187 RETURN RESULT ;
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188
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189 END "=" ;
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190
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191 END CC3019B0_LIST_CLASS ;
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