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111
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1 -- CXB30132.AM
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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 --
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26 -- OBJECTIVE:
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27 -- Check that imported, user-defined C language functions can be
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28 -- called from an Ada program.
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29 --
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30 -- TEST DESCRIPTION:
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31 -- This test checks that user-defined C language functions can be
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32 -- imported and referenced from an Ada program. Two C language
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33 -- functions are specified in files CXB30130.C and CXB30131.C.
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34 -- These two functions are imported to this test program, using two
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35 -- calls to Pragma Import. Each function is then called in this test,
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36 -- and the results of the call are verified.
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37 --
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38 -- This test assumes that the following characters are all included
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39 -- in the implementation defined type Interfaces.C.char:
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40 -- ' ', 'a'..'z', and 'A'..'Z'.
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41 --
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42 -- APPLICABILITY CRITERIA:
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43 -- This test is applicable to all implementations that provide
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44 -- packages Interfaces.C and Interfaces.C.Strings. If an
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45 -- implementation provides packages Interfaces.C and
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46 -- Interfaces.C.Strings, this test must compile, execute, and
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47 -- report "PASSED".
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48 --
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49 -- SPECIAL REQUIREMENTS:
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50 -- The files CXB30130.C and CXB30131.C must be compiled with a C
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51 -- compiler. Implementation dialects of C may require alteration of
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52 -- the C program syntax (see individual C files).
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53 --
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54 -- Note that the compiled C code must be bound with the compiled Ada
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55 -- code to create an executable image. An implementation must provide
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56 -- the necessary commands to accomplish this.
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57 --
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58 -- Note that the C code included in CXB30130.C and CXB30131.C conforms
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59 -- to ANSI-C. Modifications to these files may be required for other
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60 -- C compilers. An implementation must provide the necessary
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61 -- modifications to satisfy the function requirements.
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62 --
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63 -- TEST FILES:
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64 -- The following files comprise this test:
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65 --
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66 -- CXB30130.C
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67 -- CXB30131.C
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68 -- CXB30132.AM
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69 --
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70 --
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71 -- CHANGE HISTORY:
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72 -- 13 Oct 95 SAIC Initial prerelease version.
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73 -- 13 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
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74 -- 26 Oct 96 SAIC Incorporated reviewer comments.
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75 --
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76 --!
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77
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78 with Report;
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79 with Impdef;
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80 with Interfaces.C; -- N/A => ERROR
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81 with Interfaces.C.Strings; -- N/A => ERROR
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82
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83 procedure CXB30132 is
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84 begin
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85
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86 Report.Test ("CXB3013", "Check that user-defined C functions can " &
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87 "be imported into an Ada program");
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88
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89 Test_Block:
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90 declare
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91
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92 package IC renames Interfaces.C;
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93 package ICS renames Interfaces.C.Strings;
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94
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95 use type IC.char_array;
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96 use type IC.int;
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97 use type IC.short;
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98 use type IC.C_float;
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99 use type IC.double;
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100
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101 type Short_Ptr is access all IC.short;
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102 type Float_Ptr is access all IC.C_float;
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103 type Double_Ptr is access all IC.double;
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104 subtype Char_Array_Type is IC.char_array(0..20);
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105
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106 TC_Default_int : IC.int := 49;
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107 TC_Default_short : IC.short := 3;
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108 TC_Default_float : IC.C_float := 50.0;
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109 TC_Default_double : IC.double := 1209.0;
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110
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111 An_Int_Value : IC.int := TC_Default_int;
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112 A_Short_Value : aliased IC.short := TC_Default_short;
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113 A_Float_Value : aliased IC.C_float := TC_Default_float;
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114 A_Double_Value : aliased IC.double := TC_Default_double;
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115
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116 A_Short_Int_Pointer : Short_Ptr := A_Short_Value'access;
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117 A_Float_Pointer : Float_Ptr := A_Float_Value'access;
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118 A_Double_Pointer : Double_Ptr := A_Double_Value'access;
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119
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120 Char_Array_1 : Char_Array_Type;
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121 Char_Array_2 : Char_Array_Type;
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122 Char_Pointer : ICS.chars_ptr;
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123
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124 TC_Char_Array : constant Char_Array_Type :=
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125 "Look before you leap" & IC.nul;
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126 TC_Return_int : IC.int := 0;
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127
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128 -- The Square_It function returns the square of the value The_Int
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129 -- through the function name, and returns the square of the other
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130 -- parameters through the parameter list (the last three parameters
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131 -- are access values).
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132
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133 function Square_It (The_Int : in IC.int;
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134 The_Short : in Short_Ptr;
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135 The_Float : in Float_Ptr;
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136 The_Double : in Double_Ptr) return IC.int;
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137
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138 -- The Combine_Strings function returns the result of the catenation
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139 -- of the two string parameters through the function name.
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140
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141 function Combine_Strings (First_Part : in IC.char_array;
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142 Second_Part : in IC.char_array)
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143 return ICS.chars_ptr;
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144
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145
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146 -- Use the user-defined C function square_it as a completion to the
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147 -- function specification above.
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148
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149 pragma Import (Convention => C,
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150 Entity => Square_It,
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151 External_Name => Impdef.CXB30130_External_Name);
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152
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153 -- Use the user-defined C function combine_two_strings as a completion
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154 -- to the function specification above.
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155
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156 pragma Import (C, Combine_Strings, Impdef.CXB30131_External_Name);
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157
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158
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159 begin
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160
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161 -- Check that the imported version of C function CXB30130 produces
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162 -- the correct results.
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163
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164 TC_Return_int := Square_It (The_Int => An_Int_Value,
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165 The_Short => A_Short_Int_Pointer,
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166 The_Float => A_Float_Pointer,
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167 The_Double => A_Double_Pointer);
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168
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169 -- Compare the results with the expected results. Note that in the
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170 -- case of the three "pointer" parameters, the objects being pointed
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171 -- to have been modified as a result of the function.
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172
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173 if TC_Return_int /= An_Int_Value * An_Int_Value or
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174 A_Short_Int_Pointer.all /= TC_Default_short * TC_Default_Short or
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175 A_Short_Value /= TC_Default_short * TC_Default_Short or
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176 A_Float_Pointer.all /= TC_Default_float * TC_Default_float or
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177 A_Float_Value /= TC_Default_float * TC_Default_float or
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178 A_Double_Pointer.all /= TC_Default_double * TC_Default_double or
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179 A_Double_Value /= TC_Default_double * TC_Default_double
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180 then
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181 Report.Failed("Incorrect results returned from function square_it");
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182 end if;
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183
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184
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185 -- Check that two char_array values are combined by the imported
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186 -- C function CXB30131.
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187
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188 Char_Array_1(0..12) := "Look before " & IC.nul;
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189 Char_Array_2(0..8) := "you leap" & IC.nul;
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190
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191 Char_Pointer := Combine_Strings (Char_Array_1, Char_Array_2);
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192
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193 if ICS.Value(Char_Pointer) /= TC_Char_Array then
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194 Report.Failed("Incorrect value returned from imported function " &
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195 "combine_two_strings");
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196 end if;
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197
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198
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199 exception
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200 when others => Report.Failed ("Exception raised in Test_Block");
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201 end Test_Block;
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202
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203 Report.Result;
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204
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205 end CXB30132;
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