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  16 <hr><div style="text-align:center"><h1> File : terminal_interface-curses-forms-field_types.ads </h1></div><hr>
  17 <pre>
  18 <span class="comment"><em>------------------------------------------------------------------------------</em></span>
  19 <span class="comment"><em>--                                                                          --</em></span>
  20 <span class="comment"><em>--                           <strong>GNAT</strong> ncurses Binding                           --</em></span>
  21 <span class="comment"><em>--                                                                          --</em></span>
  22 <span class="comment"><em>--                 Terminal_Interface.Curses.Forms.Field_Types              --</em></span>
  23 <span class="comment"><em>--                                                                          --</em></span>
  24 <span class="comment"><em>--                                 S P E C                                  --</em></span>
  25 <span class="comment"><em>--                                                                          --</em></span>
  26 <span class="comment"><em>------------------------------------------------------------------------------</em></span>
  27 <span class="comment"><em>-- Copyright 2018,2020 Thomas E. Dickey                                     --</em></span>
  28 <span class="comment"><em>-- Copyright 1998-2011,2014 Free Software Foundation, Inc.                  --</em></span>
  29 <span class="comment"><em>--                                                                          --</em></span>
  30 <span class="comment"><em>-- Permission is hereby granted, free of charge, to any person obtaining a  --</em></span>
  31 <span class="comment"><em>-- copy of this software and associated documentation files (the            --</em></span>
  32 <span class="comment"><em>-- "Software"), to deal in the Software without restriction, including      --</em></span>
  33 <span class="comment"><em>-- without limitation the rights to use, copy, modify, merge, publish,      --</em></span>
  34 <span class="comment"><em>-- distribute, distribute with modifications, sublicense, and/or sell       --</em></span>
  35 <span class="comment"><em>-- copies of the Software, and to permit persons to whom the Software is    --</em></span>
  36 <span class="comment"><em>-- furnished to do so, subject to the following conditions:                 --</em></span>
  37 <span class="comment"><em>--                                                                          --</em></span>
  38 <span class="comment"><em>-- The above copyright notice and this permission notice shall be included  --</em></span>
  39 <span class="comment"><em>-- in all copies or substantial portions of the Software.                   --</em></span>
  40 <span class="comment"><em>--                                                                          --</em></span>
  41 <span class="comment"><em>-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  --</em></span>
  42 <span class="comment"><em>-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --</em></span>
  43 <span class="comment"><em>-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   --</em></span>
  44 <span class="comment"><em>-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   --</em></span>
  45 <span class="comment"><em>-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    --</em></span>
  46 <span class="comment"><em>-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    --</em></span>
  47 <span class="comment"><em>-- THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               --</em></span>
  48 <span class="comment"><em>--                                                                          --</em></span>
  49 <span class="comment"><em>-- Except as contained in this notice, the name(s) of the above copyright   --</em></span>
  50 <span class="comment"><em>-- holders shall not be used in advertising or otherwise to promote the     --</em></span>
  51 <span class="comment"><em>-- sale, use or other dealings in this Software without prior written       --</em></span>
  52 <span class="comment"><em>-- authorization.                                                           --</em></span>
  53 <span class="comment"><em>------------------------------------------------------------------------------</em></span>
  54 <span class="comment"><em>--  Author:  Juergen Pfeifer, 1996</em></span>
  55 <span class="comment"><em>--  Version Control:</em></span>
  56 <span class="comment"><em>--  @Revision: 1.21 @</em></span>
  57 <span class="comment"><em>--  Binding Version 01.00</em></span>
  58 <span class="comment"><em>------------------------------------------------------------------------------</em></span>
  59 <b>with</b> <a href="interfac__ads.htm#ref_38_9">Interfaces</a>.C;
  60 <b>with</b> <a href="terminal_interface__ads.htm#ref_43_9">Terminal_Interface</a>.<a href="terminal_interface-curses__ads.htm#ref_48_28">Curses</a>.<a href="terminal_interface-curses-aux__ads.htm#ref_46_35">Aux</a>;
  61
  62 <b>package</b> <a href="terminal_interface__ads.htm#ref_43_9">Terminal_Interface</a>.<a href="terminal_interface-curses__ads.htm#ref_48_28">Curses</a>.<a href="terminal_interface-curses-forms__ads.htm#ref_46_35">Forms</a>.<span class="symbol"><a name="ref_45_41" href="terminal_interface-curses-forms-field_types__adb.htm#ref_52_46">Field_Types</a></span> <b>is</b>
  63    <b>pragma</b> Preelaborate (<a href="terminal_interface__ads.htm#ref_43_9">Terminal_Interface</a>.<a href="terminal_interface-curses__ads.htm#ref_48_28">Curses</a>.<a href="terminal_interface-curses-forms__ads.htm#ref_46_35">Forms</a>.<a href="terminal_interface-curses-forms-field_types__ads.htm#ref_45_41">Field_Types</a>);
  64    <b>subtype</b> <span class="symbol"><a name="ref_47_12">C_Int</a></span> <b>is</b> <a href="interfac__ads.htm#ref_38_9">Interfaces</a>.C.int;
  65
  66    <span class="comment"><em>--  |=====================================================================</em></span>
  67    <span class="comment"><em>--  | Man page <A HREF="../man/form_fieldtype.3x.html">form_fieldtype.3x</A></em></span>
  68    <span class="comment"><em>--  |=====================================================================</em></span>
  69
  70    <b>type</b> <span class="symbol"><a name="ref_53_9">Field_Type</a></span> <b>is</b> <b>abstract</b> <b>tagged</b> <b>null</b> <b>record</b>;
  71    <span class="comment"><em>--  Abstract base type for all field types. A concrete field type</em></span>
  72    <span class="comment"><em>--  is an extension that adds some data elements describing formats or</em></span>
  73    <span class="comment"><em>--  boundary values for the type and validation routines.</em></span>
  74    <span class="comment"><em>--  For the builtin low-level fieldtypes, the validation routines are</em></span>
  75    <span class="comment"><em>--  already defined by the low-level C library.</em></span>
  76    <span class="comment"><em>--  The builtin types like Alpha or AlphaNumeric etc. are defined in</em></span>
  77    <span class="comment"><em>--  child packages of this package. You may use one of them as example</em></span>
  78    <span class="comment"><em>--  how to create you own child packages for low-level field types that</em></span>
  79    <span class="comment"><em>--  you may have already written in C.</em></span>
  80
  81    <b>type</b> <span class="symbol"><a name="ref_64_9">Field_Type_Access</a></span> <b>is</b> <b>access</b> <b>all</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_53_9">Field_Type</a>'Class;
  82
  83    <span class="comment"><em>--  <A NAME="AFU_1">|</A></em></span>
  84    <b>procedure</b> <span class="symbol"><a name="ref_67_14">Set_Field_Type</a></span> (<span class="symbol"><a name="ref_67_30">Fld</a></span>      : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>;
  85                              <span class="symbol"><a name="ref_68_30">Fld_Type</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_53_9">Field_Type</a>) <b>is</b> <b>abstract</b>;
  86    <span class="comment"><em>--  AKA: <A HREF="../man/form_fieldtype.3x.html">set_field_type()</A></em></span>
  87    <span class="comment"><em>--  But: we hide the vararg mechanism of the C interface. You always</em></span>
  88    <span class="comment"><em>--       have to pass a single Field_Type parameter.</em></span>
  89
  90    <span class="comment"><em>--  ---------------------------------------------------------------------</em></span>
  91
  92    <span class="comment"><em>--  |=====================================================================</em></span>
  93    <span class="comment"><em>--  | Man page <A HREF="../man/form_field_validation.3x.html">form_field_validation.3x</A></em></span>
  94    <span class="comment"><em>--  |=====================================================================</em></span>
  95
  96    <span class="comment"><em>--  <A NAME="AFU_2">|</A></em></span>
  97    <b>function</b> <span class="symbol"><a name="ref_80_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_71_13">Get_Type</a></span> (<span class="symbol"><a name="ref_80_23" href="terminal_interface-curses-forms-field_types__adb.htm#ref_71_23">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>) <b>return</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_64_9">Field_Type_Access</a>;
  98    <span class="comment"><em>--  AKA: <A HREF="../man/form_field_validation.3x.html">field_type()</A></em></span>
  99    <span class="comment"><em>--  AKA: field_arg()</em></span>
 100    <span class="comment"><em>--  In Ada95 we can combine these. If you try to retrieve the field type</em></span>
 101    <span class="comment"><em>--  that is not defined as extension of the abstract tagged type above,</em></span>
 102    <span class="comment"><em>--  you will raise a Form_Exception.</em></span>
 103    <span class="comment"><em>--  This is not inlined</em></span>
 104
 105    <span class="comment"><em>--  +----------------------------------------------------------------------</em></span>
 106    <span class="comment"><em>--  | Private Part.</em></span>
 107    <span class="comment"><em>--  | Most of this is used by the implementations of the child packages.</em></span>
 108    <span class="comment"><em>--  |</em></span>
 109 <b>private</b>
 110    <b>type</b> <span class="symbol"><a name="ref_93_9" href="terminal_interface-curses-forms-field_types__ads.htm#ref_45_41">Makearg_Function</a></span> <b>is</b> <b>access</b>
 111      <b>function</b> (<span class="symbol"><a name="ref_94_16">Args</a></span> : System.Address) <b>return</b> System.Address;
 112    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_93_9">Makearg_Function</a>);
 113
 114    <b>type</b> <span class="symbol"><a name="ref_97_9">Copyarg_Function</a></span> <b>is</b> <b>access</b>
 115      <b>function</b> (<span class="symbol"><a name="ref_98_16">Usr</a></span> : System.Address) <b>return</b> System.Address;
 116    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_97_9">Copyarg_Function</a>);
 117
 118    <b>type</b> <span class="symbol"><a name="ref_101_9">Freearg_Function</a></span> <b>is</b> <b>access</b>
 119      <b>procedure</b> (<span class="symbol"><a name="ref_102_17">Usr</a></span> : System.Address);
 120    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_101_9">Freearg_Function</a>);
 121
 122    <b>type</b> <span class="symbol"><a name="ref_105_9">Field_Check_Function</a></span> <b>is</b> <b>access</b>
 123      <b>function</b> (<span class="symbol"><a name="ref_106_16">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>; <span class="symbol"><a name="ref_106_29">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 124    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_105_9">Field_Check_Function</a>);
 125
 126    <b>type</b> <span class="symbol"><a name="ref_109_9">Char_Check_Function</a></span> <b>is</b> <b>access</b>
 127      <b>function</b> (<span class="symbol"><a name="ref_110_16">Ch</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_47_12">C_Int</a>; <span class="symbol"><a name="ref_110_28">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 128    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_109_9">Char_Check_Function</a>);
 129
 130    <b>type</b> <span class="symbol"><a name="ref_113_9">Choice_Function</a></span> <b>is</b> <b>access</b>
 131      <b>function</b> (<span class="symbol"><a name="ref_114_16">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>; <span class="symbol"><a name="ref_114_29">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 132    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_113_9">Choice_Function</a>);
 133
 134    <span class="comment"><em>--  +----------------------------------------------------------------------</em></span>
 135    <span class="comment"><em>--  | This must be in sync with the FIELDTYPE structure in form.h</em></span>
 136    <span class="comment"><em>--  |</em></span>
 137    <b>type</b> <span class="symbol"><a name="ref_120_9">Low_Level_Field_Type</a></span> <b>is</b>
 138       <b>record</b>
 139          <span class="symbol"><a name="ref_122_10">Status</a></span> :              <a href="interfac__ads.htm#ref_38_9">Interfaces</a>.C.unsigned_short;
 140          <span class="symbol"><a name="ref_123_10">Ref_Count</a></span> :           <a href="interfac__ads.htm#ref_38_9">Interfaces</a>.C.long;
 141          <span class="symbol"><a name="ref_124_10">Left</a></span>, <span class="symbol"><a name="ref_124_16">Right</a></span> :         System.Address;
 142          <span class="symbol"><a name="ref_125_10">Makearg</a></span> :             <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_93_9">Makearg_Function</a>;
 143          <span class="symbol"><a name="ref_126_10">Copyarg</a></span> :             <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_97_9">Copyarg_Function</a>;
 144          <span class="symbol"><a name="ref_127_10">Freearg</a></span> :             <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_101_9">Freearg_Function</a>;
 145          <span class="symbol"><a name="ref_128_10">Fcheck</a></span> :              <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_105_9">Field_Check_Function</a>;
 146          <span class="symbol"><a name="ref_129_10">Ccheck</a></span> :              <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_109_9">Char_Check_Function</a>;
 147          <span class="symbol"><a name="ref_130_10">Next</a></span>, <span class="symbol"><a name="ref_130_16">Prev</a></span> :          <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_113_9">Choice_Function</a>;
 148       <b>end</b> <b>record</b>;
 149    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_120_9">Low_Level_Field_Type</a>);
 150    <b>type</b> <span class="symbol"><a name="ref_133_9">C_Field_Type</a></span> <b>is</b> <b>access</b> <b>all</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_120_9">Low_Level_Field_Type</a>;
 151
 152    <span class="symbol"><a name="ref_135_4">Null_Field_Type</a></span>   : <b>constant</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <b>null</b>;
 153
 154    <span class="comment"><em>--  +----------------------------------------------------------------------</em></span>
 155    <span class="comment"><em>--  | This four low-level fieldtypes are the ones associated with</em></span>
 156    <span class="comment"><em>--  | fieldtypes handled by this binding. Any other low-level fieldtype</em></span>
 157    <span class="comment"><em>--  | will result in a Form_Exception is function Get_Type.</em></span>
 158    <span class="comment"><em>--  |</em></span>
 159    <span class="symbol"><a name="ref_142_4">M_Generic_Type</a></span>   : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <b>null</b>;
 160    <span class="symbol"><a name="ref_143_4">M_Generic_Choice</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <b>null</b>;
 161    <span class="symbol"><a name="ref_144_4">M_Builtin_Router</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <b>null</b>;
 162    <span class="symbol"><a name="ref_145_4">M_Choice_Router</a></span>  : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <b>null</b>;
 163
 164    <span class="comment"><em>--  Two wrapper functions to access those low-level fieldtypes defined</em></span>
 165    <span class="comment"><em>--  in this package.</em></span>
 166    <b>function</b> <span class="symbol"><a name="ref_149_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_222_13">C_Builtin_Router</a></span> <b>return</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;
 167    <b>function</b> <span class="symbol"><a name="ref_150_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_245_13">C_Choice_Router</a></span>  <b>return</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;
 168
 169    <b>procedure</b> <span class="symbol"><a name="ref_152_14" href="terminal_interface-curses-forms-field_types__adb.htm#ref_128_14">Wrap_Builtin</a></span> (<span class="symbol"><a name="ref_152_28" href="terminal_interface-curses-forms-field_types__adb.htm#ref_128_28">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>;
 170                            <span class="symbol"><a name="ref_153_28" href="terminal_interface-curses-forms-field_types__adb.htm#ref_129_28">Typ</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_53_9">Field_Type</a>'Class;
 171                            <span class="symbol"><a name="ref_154_28" href="terminal_interface-curses-forms-field_types__adb.htm#ref_130_28">Cft</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a> := <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_149_13">C_Builtin_Router</a>);
 172    <span class="comment"><em>--  This procedure has to be called by the Set_Field_Type implementation</em></span>
 173    <span class="comment"><em>--  for builtin low-level fieldtypes to replace it by an Ada95</em></span>
 174    <span class="comment"><em>--  conformant Field_Type object.</em></span>
 175    <span class="comment"><em>--  The parameter Cft must be C_Builtin_Router for regular low-level</em></span>
 176    <span class="comment"><em>--  fieldtypes (like TYP_ALPHA or TYP_ALNUM) and C_Choice_Router for</em></span>
 177    <span class="comment"><em>--  low-level fieldtypes witch choice functions (like TYP_ENUM).</em></span>
 178    <span class="comment"><em>--  Any other value will raise a Form_Exception.</em></span>
 179
 180    <b>function</b> <span class="symbol"><a name="ref_163_13">Make_Arg</a></span> (<span class="symbol"><a name="ref_163_23">Args</a></span> : System.Address) <b>return</b> System.Address;
 181    <b>pragma</b> Import (C, Make_Arg, "void_star_make_arg");
 182    <span class="comment"><em>--  This is the Makearg_Function for the internal low-level types</em></span>
 183    <span class="comment"><em>--  introduced by this binding.</em></span>
 184
 185    <b>function</b> <span class="symbol"><a name="ref_168_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_97_13">Copy_Arg</a></span> (<span class="symbol"><a name="ref_168_23" href="terminal_interface-curses-forms-field_types__adb.htm#ref_97_23">Usr</a></span> : System.Address) <b>return</b> System.Address;
 186    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_168_13">Copy_Arg</a>);
 187    <span class="comment"><em>--  This is the Copyarg_Function for the internal low-level types</em></span>
 188    <span class="comment"><em>--  introduced by this binding.</em></span>
 189
 190    <b>procedure</b> <span class="symbol"><a name="ref_173_14" href="terminal_interface-curses-forms-field_types__adb.htm#ref_103_14">Free_Arg</a></span> (<span class="symbol"><a name="ref_173_24" href="terminal_interface-curses-forms-field_types__adb.htm#ref_103_24">Usr</a></span> : System.Address);
 191    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_173_14">Free_Arg</a>);
 192    <span class="comment"><em>--  This is the Freearg_Function for the internal low-level types</em></span>
 193    <span class="comment"><em>--  introduced by this binding.</em></span>
 194
 195    <b>function</b> <span class="symbol"><a name="ref_178_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_160_13">Field_Check_Router</a></span> (<span class="symbol"><a name="ref_178_33" href="terminal_interface-curses-forms-field_types__adb.htm#ref_160_33">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>;
 196                                 <span class="symbol"><a name="ref_179_33" href="terminal_interface-curses-forms-field_types__adb.htm#ref_161_33">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 197    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_178_13">Field_Check_Router</a>);
 198    <span class="comment"><em>--  This is the Field_Check_Function for the internal low-level types</em></span>
 199    <span class="comment"><em>--  introduced to wrap the low-level types by a Field_Type derived</em></span>
 200    <span class="comment"><em>--  type. It routes the call to the corresponding low-level validation</em></span>
 201    <span class="comment"><em>--  function.</em></span>
 202
 203    <b>function</b> <span class="symbol"><a name="ref_186_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_175_13">Char_Check_Router</a></span> (<span class="symbol"><a name="ref_186_32" href="terminal_interface-curses-forms-field_types__adb.htm#ref_175_32">Ch</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_47_12">C_Int</a>;
 204                                <span class="symbol"><a name="ref_187_32" href="terminal_interface-curses-forms-field_types__adb.htm#ref_176_32">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 205    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_186_13">Char_Check_Router</a>);
 206    <span class="comment"><em>--  This is the Char_Check_Function for the internal low-level types</em></span>
 207    <span class="comment"><em>--  introduced to wrap the low-level types by a Field_Type derived</em></span>
 208    <span class="comment"><em>--  type. It routes the call to the corresponding low-level validation</em></span>
 209    <span class="comment"><em>--  function.</em></span>
 210
 211    <b>function</b> <span class="symbol"><a name="ref_194_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_190_13">Next_Router</a></span> (<span class="symbol"><a name="ref_194_26" href="terminal_interface-curses-forms-field_types__adb.htm#ref_190_26">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>;
 212                          <span class="symbol"><a name="ref_195_26" href="terminal_interface-curses-forms-field_types__adb.htm#ref_191_26">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 213    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_194_13">Next_Router</a>);
 214    <span class="comment"><em>--  This is the Choice_Function for the internal low-level types</em></span>
 215    <span class="comment"><em>--  introduced to wrap the low-level types by a Field_Type derived</em></span>
 216    <span class="comment"><em>--  type. It routes the call to the corresponding low-level next_choice</em></span>
 217    <span class="comment"><em>--  function.</em></span>
 218
 219    <b>function</b> <span class="symbol"><a name="ref_202_13" href="terminal_interface-curses-forms-field_types__adb.htm#ref_205_13">Prev_Router</a></span> (<span class="symbol"><a name="ref_202_26" href="terminal_interface-curses-forms-field_types__adb.htm#ref_205_26">Fld</a></span> : <a href="terminal_interface-curses-forms__ads.htm#ref_52_9">Field</a>;
 220                          <span class="symbol"><a name="ref_203_26" href="terminal_interface-curses-forms-field_types__adb.htm#ref_206_26">Usr</a></span> : System.Address) <b>return</b> <a href="terminal_interface-curses__ads.htm#ref_2099_9">Curses_Bool</a>;
 221    <b>pragma</b> Convention (C, <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_202_13">Prev_Router</a>);
 222    <span class="comment"><em>--  This is the Choice_Function for the internal low-level types</em></span>
 223    <span class="comment"><em>--  introduced to wrap the low-level types by a Field_Type derived</em></span>
 224    <span class="comment"><em>--  type. It routes the call to the corresponding low-level prev_choice</em></span>
 225    <span class="comment"><em>--  function.</em></span>
 226
 227    <span class="comment"><em>--  This is the Argument structure maintained by all low-level field types</em></span>
 228    <span class="comment"><em>--  introduced by this binding.</em></span>
 229    <b>type</b> <span class="symbol"><a name="ref_212_9">Argument</a></span> <b>is</b> <b>record</b>
 230       <span class="symbol"><a name="ref_213_7">Typ</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_64_9">Field_Type_Access</a>;   <span class="comment"><em>--  the Field_Type creating this record</em></span>
 231       <span class="symbol"><a name="ref_214_7">Usr</a></span> : System.Address;      <span class="comment"><em>--  original arg for builtin low-level types</em></span>
 232       <span class="symbol"><a name="ref_215_7">Cft</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;        <span class="comment"><em>--  the original low-level type</em></span>
 233    <b>end</b> <b>record</b>;
 234    <b>type</b> <span class="symbol"><a name="ref_217_9">Argument_Access</a></span> <b>is</b> <b>access</b> <b>all</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_212_9">Argument</a>;
 235
 236    <span class="comment"><em>--  +----------------------------------------------------------------------</em></span>
 237    <span class="comment"><em>--  |</em></span>
 238    <span class="comment"><em>--  | Some Imports of libform routines to deal with low-level fieldtypes.</em></span>
 239    <span class="comment"><em>--  |</em></span>
 240    <b>function</b> <span class="symbol"><a name="ref_223_13">New_Fieldtype</a></span> (<span class="symbol"><a name="ref_223_28">Fcheck</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_105_9">Field_Check_Function</a>;
 241                            <span class="symbol"><a name="ref_224_28">Ccheck</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_109_9">Char_Check_Function</a>)
 242      <b>return</b> <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;
 243    <b>pragma</b> Import (C, New_Fieldtype, "new_fieldtype");
 244
 245    <b>function</b> <span class="symbol"><a name="ref_228_13">Set_Fieldtype_Arg</a></span> (<span class="symbol"><a name="ref_228_32">Cft</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;
 246                                <span class="symbol"><a name="ref_229_32">Mak</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_93_9">Makearg_Function</a> := <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_163_13">Make_Arg</a>'<b>Access</b>;
 247                                <span class="symbol"><a name="ref_230_32">Cop</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_97_9">Copyarg_Function</a> := <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_168_13">Copy_Arg</a>'<b>Access</b>;
 248                                <span class="symbol"><a name="ref_231_32">Fre</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_101_9">Freearg_Function</a> := <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_173_14">Free_Arg</a>'<b>Access</b>)
 249      <b>return</b> <a href="terminal_interface-curses-aux__ads.htm#ref_46_35">Aux</a>.<a href="terminal_interface-curses-aux__ads.htm#ref_70_9">Eti_Error</a>;
 250    <b>pragma</b> Import (C, Set_Fieldtype_Arg, "set_fieldtype_arg");
 251
 252    <b>function</b> <span class="symbol"><a name="ref_235_13">Set_Fieldtype_Choice</a></span> (<span class="symbol"><a name="ref_235_35">Cft</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_133_9">C_Field_Type</a>;
 253                                   <span class="symbol"><a name="ref_236_35">Next</a></span>, <span class="symbol"><a name="ref_236_41">Prev</a></span> : <a href="terminal_interface-curses-forms-field_types__ads.htm#ref_113_9">Choice_Function</a>)
 254      <b>return</b> <a href="terminal_interface-curses-aux__ads.htm#ref_46_35">Aux</a>.<a href="terminal_interface-curses-aux__ads.htm#ref_70_9">Eti_Error</a>;
 255    <b>pragma</b> Import (C, Set_Fieldtype_Choice, "set_fieldtype_choice");
 256
 257 <b>end</b> <a href="terminal_interface__ads.htm#ref_43_9">Terminal_Interface</a>.<a href="terminal_interface-curses__ads.htm#ref_48_28">Curses</a>.<a href="terminal_interface-curses-forms__ads.htm#ref_46_35">Forms</a>.<a href="terminal_interface-curses-forms-field_types__ads.htm#ref_45_41">Field_Types</a>;
 258 </pre></body></html>