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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- G E T _ S P A R K _ X R E F S --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 2011-2013, Free Software Foundation, Inc. --
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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. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- This package contains the function used to read SPARK cross-reference
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27 -- information from an ALI file and populate the tables defined in package
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28 -- SPARK_Xrefs with the result.
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29
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30 generic
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31 -- These subprograms provide access to the ALI file. Locating, opening and
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32 -- providing access to the ALI file is the callers' responsibility.
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33
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34 with function Getc return Character is <>;
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35 -- Get next character, positioning the ALI file ready to read the following
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36 -- character (equivalent to calling Nextc, then Skipc). If the end of file
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37 -- is encountered, the value Types.EOF is returned.
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38
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39 with function Nextc return Character is <>;
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40 -- Look at the next character, and return it, leaving the position of the
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41 -- file unchanged, so that a subsequent call to Getc or Nextc will return
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42 -- this same character. If the file is positioned at the end of file, then
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43 -- Types.EOF is returned.
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44
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45 with procedure Skipc is <>;
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46 -- Skip past the current character (which typically was read with Nextc),
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47 -- and position to the next character, which will be returned by the next
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48 -- call to Getc or Nextc.
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49
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50 procedure Get_SPARK_Xrefs;
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51 -- Load SPARK cross-reference information from ALI file text format into
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52 -- internal SPARK tables (SPARK_Xrefs.SPARK_Xref_Table,
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53 -- SPARK_Xrefs.SPARK_Scope_Table and SPARK_Xrefs.SPARK_File_Table). On entry
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54 -- the input file is positioned to the initial 'F' of the first SPARK specific
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55 -- line in the ALI file. On return, the file is positioned either to the end
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56 -- of file, or to the first character of the line following the SPARK specific
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57 -- information (which will never start with an 'F').
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58 --
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59 -- If a format error is detected in the input, then an exception is raised
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60 -- (Ada.IO_Exceptions.Data_Error), with the file positioned to the error.
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