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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- A D A . T E X T _ I O . M O D U L A R _ A U X --
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6 -- --
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7 -- B o d y --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
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33
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34 with System.Img_BIU; use System.Img_BIU;
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35 with System.Img_Uns; use System.Img_Uns;
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36 with System.Img_LLB; use System.Img_LLB;
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37 with System.Img_LLU; use System.Img_LLU;
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38 with System.Img_LLW; use System.Img_LLW;
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39 with System.Img_WIU; use System.Img_WIU;
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40 with System.Val_Uns; use System.Val_Uns;
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41 with System.Val_LLU; use System.Val_LLU;
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42
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43 package body Ada.Text_IO.Modular_Aux is
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44
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45 use System.Unsigned_Types;
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46
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47 -----------------------
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48 -- Local Subprograms --
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49 -----------------------
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50
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51 procedure Load_Modular
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52 (File : File_Type;
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53 Buf : out String;
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54 Ptr : in out Natural);
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55 -- This is an auxiliary routine that is used to load an possibly signed
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56 -- modular literal value from the input file into Buf, starting at Ptr + 1.
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57 -- Ptr is left set to the last character stored.
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58
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59 -------------
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60 -- Get_LLU --
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61 -------------
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62
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63 procedure Get_LLU
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64 (File : File_Type;
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65 Item : out Long_Long_Unsigned;
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66 Width : Field)
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67 is
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68 Buf : String (1 .. Field'Last);
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69 Stop : Integer := 0;
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70 Ptr : aliased Integer := 1;
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71
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72 begin
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73 if Width /= 0 then
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74 Load_Width (File, Width, Buf, Stop);
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75 String_Skip (Buf, Ptr);
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76 else
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77 Load_Modular (File, Buf, Stop);
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78 end if;
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79
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80 Item := Scan_Long_Long_Unsigned (Buf, Ptr'Access, Stop);
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81 Check_End_Of_Field (Buf, Stop, Ptr, Width);
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82 end Get_LLU;
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83
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84 -------------
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85 -- Get_Uns --
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86 -------------
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87
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88 procedure Get_Uns
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89 (File : File_Type;
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90 Item : out Unsigned;
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91 Width : Field)
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92 is
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93 Buf : String (1 .. Field'Last);
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94 Stop : Integer := 0;
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95 Ptr : aliased Integer := 1;
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96
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97 begin
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98 if Width /= 0 then
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99 Load_Width (File, Width, Buf, Stop);
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100 String_Skip (Buf, Ptr);
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101 else
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102 Load_Modular (File, Buf, Stop);
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103 end if;
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104
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105 Item := Scan_Unsigned (Buf, Ptr'Access, Stop);
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106 Check_End_Of_Field (Buf, Stop, Ptr, Width);
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107 end Get_Uns;
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108
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109 --------------
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110 -- Gets_LLU --
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111 --------------
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112
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113 procedure Gets_LLU
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114 (From : String;
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115 Item : out Long_Long_Unsigned;
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116 Last : out Positive)
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117 is
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118 Pos : aliased Integer;
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119
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120 begin
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121 String_Skip (From, Pos);
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122 Item := Scan_Long_Long_Unsigned (From, Pos'Access, From'Last);
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123 Last := Pos - 1;
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124
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125 exception
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126 when Constraint_Error =>
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127 raise Data_Error;
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128 end Gets_LLU;
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129
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130 --------------
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131 -- Gets_Uns --
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132 --------------
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133
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134 procedure Gets_Uns
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135 (From : String;
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136 Item : out Unsigned;
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137 Last : out Positive)
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138 is
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139 Pos : aliased Integer;
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140
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141 begin
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142 String_Skip (From, Pos);
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143 Item := Scan_Unsigned (From, Pos'Access, From'Last);
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144 Last := Pos - 1;
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145
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146 exception
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147 when Constraint_Error =>
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148 raise Data_Error;
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149 end Gets_Uns;
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150
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151 ------------------
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152 -- Load_Modular --
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153 ------------------
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154
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155 procedure Load_Modular
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156 (File : File_Type;
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157 Buf : out String;
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158 Ptr : in out Natural)
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159 is
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160 Hash_Loc : Natural;
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161 Loaded : Boolean;
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162
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163 begin
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164 Load_Skip (File);
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165
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166 -- Note: it is a bit strange to allow a minus sign here, but it seems
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167 -- consistent with the general behavior expected by the ACVC tests
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168 -- which is to scan past junk and then signal data error, see ACVC
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169 -- test CE3704F, case (6), which is for signed integer exponents,
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170 -- which seems a similar case.
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171
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172 Load (File, Buf, Ptr, '+', '-');
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173 Load_Digits (File, Buf, Ptr, Loaded);
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174
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175 if Loaded then
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176
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177 -- Deal with based case. We recognize either the standard '#' or the
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178 -- allowed alternative replacement ':' (see RM J.2(3)).
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179
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180 Load (File, Buf, Ptr, '#', ':', Loaded);
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181
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182 if Loaded then
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183 Hash_Loc := Ptr;
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184 Load_Extended_Digits (File, Buf, Ptr);
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185 Load (File, Buf, Ptr, Buf (Hash_Loc));
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186 end if;
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187
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188 Load (File, Buf, Ptr, 'E', 'e', Loaded);
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189
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190 if Loaded then
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191
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192 -- Note: it is strange to allow a minus sign, since the syntax
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193 -- does not, but that is what ACVC test CE3704F, case (6) wants
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194 -- for the signed case, and there seems no good reason to treat
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195 -- exponents differently for the signed and unsigned cases.
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196
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197 Load (File, Buf, Ptr, '+', '-');
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198 Load_Digits (File, Buf, Ptr);
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199 end if;
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200 end if;
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201 end Load_Modular;
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202
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203 -------------
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204 -- Put_LLU --
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205 -------------
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206
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207 procedure Put_LLU
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208 (File : File_Type;
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209 Item : Long_Long_Unsigned;
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210 Width : Field;
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211 Base : Number_Base)
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212 is
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213 Buf : String (1 .. Field'Last);
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214 Ptr : Natural := 0;
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215
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216 begin
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217 if Base = 10 and then Width = 0 then
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218 Set_Image_Long_Long_Unsigned (Item, Buf, Ptr);
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219 elsif Base = 10 then
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220 Set_Image_Width_Long_Long_Unsigned (Item, Width, Buf, Ptr);
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221 else
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222 Set_Image_Based_Long_Long_Unsigned (Item, Base, Width, Buf, Ptr);
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223 end if;
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224
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225 Put_Item (File, Buf (1 .. Ptr));
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226 end Put_LLU;
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227
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228 -------------
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229 -- Put_Uns --
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230 -------------
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231
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232 procedure Put_Uns
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233 (File : File_Type;
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234 Item : Unsigned;
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235 Width : Field;
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236 Base : Number_Base)
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237 is
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238 Buf : String (1 .. Field'Last);
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239 Ptr : Natural := 0;
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240
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241 begin
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242 if Base = 10 and then Width = 0 then
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243 Set_Image_Unsigned (Item, Buf, Ptr);
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244 elsif Base = 10 then
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245 Set_Image_Width_Unsigned (Item, Width, Buf, Ptr);
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246 else
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247 Set_Image_Based_Unsigned (Item, Base, Width, Buf, Ptr);
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248 end if;
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249
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250 Put_Item (File, Buf (1 .. Ptr));
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251 end Put_Uns;
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252
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253 --------------
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254 -- Puts_LLU --
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255 --------------
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256
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257 procedure Puts_LLU
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258 (To : out String;
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259 Item : Long_Long_Unsigned;
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260 Base : Number_Base)
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261 is
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262 Buf : String (1 .. Field'Last);
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263 Ptr : Natural := 0;
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264
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265 begin
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266 if Base = 10 then
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267 Set_Image_Width_Long_Long_Unsigned (Item, To'Length, Buf, Ptr);
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268 else
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269 Set_Image_Based_Long_Long_Unsigned (Item, Base, To'Length, Buf, Ptr);
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270 end if;
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271
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272 if Ptr > To'Length then
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273 raise Layout_Error;
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274 else
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275 To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
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276 end if;
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277 end Puts_LLU;
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278
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279 --------------
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280 -- Puts_Uns --
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281 --------------
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282
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283 procedure Puts_Uns
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284 (To : out String;
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285 Item : Unsigned;
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286 Base : Number_Base)
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287 is
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288 Buf : String (1 .. Field'Last);
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289 Ptr : Natural := 0;
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290
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291 begin
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292 if Base = 10 then
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293 Set_Image_Width_Unsigned (Item, To'Length, Buf, Ptr);
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294 else
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295 Set_Image_Based_Unsigned (Item, Base, To'Length, Buf, Ptr);
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296 end if;
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297
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298 if Ptr > To'Length then
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299 raise Layout_Error;
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300 else
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301 To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
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302 end if;
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303 end Puts_Uns;
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304
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305 end Ada.Text_IO.Modular_Aux;
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