Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/sfn_scan.ads @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT COMPILER COMPONENTS -- | |
| 4 -- -- | |
| 5 -- S F N _ S C A N -- | |
| 6 -- -- | |
| 7 -- S p e c -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2000-2017, Free Software Foundation, Inc. -- | |
| 10 -- -- | |
| 11 -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 13 -- ware Foundation; either version 3, or (at your option) any later ver- -- | |
| 14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- | |
| 15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- | |
| 17 -- for more details. You should have received a copy of the GNU General -- | |
| 18 -- Public License distributed with GNAT; see file COPYING3. If not, go to -- | |
| 19 -- http://www.gnu.org/licenses for a complete copy of the license. -- | |
| 20 -- -- | |
| 21 -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 22 -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 23 -- -- | |
| 24 ------------------------------------------------------------------------------ | |
| 25 | |
| 26 -- This package provides a stand alone capability for scanning a gnat.adc | |
| 27 -- file for Source_File_Name pragmas. This is for use in tools other than | |
| 28 -- the compiler, which want to scan source file name pragmas without the | |
| 29 -- overhead of the full compiler scanner and parser. | |
| 30 | |
| 31 -- Note that neither the package spec, nor the package body, of this | |
| 32 -- unit contains any with statements at all. This is a completely | |
| 33 -- independent package, suitable for incorporation into tools that do | |
| 34 -- not access any other units in the GNAT compiler or tools sources. | |
| 35 | |
| 36 -- This package is NOT task safe, so multiple tasks that may call the | |
| 37 -- Scan_SFN_Pragmas procedure at the same time are responsible for | |
| 38 -- avoiding such multiple calls by appropriate synchronization. | |
| 39 | |
| 40 package SFN_Scan is | |
| 41 | |
| 42 -- The call to SFN_Scan passes pointers to two procedures that are | |
| 43 -- used to store the results of scanning any Source_File_Name pragmas | |
| 44 -- that are encountered. The following access types define the form | |
| 45 -- of these procedures: | |
| 46 | |
| 47 type Set_File_Name_Ptr is access | |
| 48 procedure | |
| 49 (Typ : Character; | |
| 50 U : String; | |
| 51 F : String; | |
| 52 Index : Natural); | |
| 53 -- The procedure with this profile is called when a Source_File_Name | |
| 54 -- pragma of the form having a unit name parameter. Typ is 'b' for | |
| 55 -- a body file name, and 's' for a spec file name. U is a string that | |
| 56 -- contains the unit name, exactly as it appeared in the source file, | |
| 57 -- and F is the file taken from the second parameter. Index is taken | |
| 58 -- from the third parameter, or is set to zero if no third parameter. | |
| 59 | |
| 60 type Set_File_Name_Pattern_Ptr is access | |
| 61 procedure (Pat : String; Typ : Character; Dot : String; Cas : Character); | |
| 62 -- This is called to process a Source_File_Name pragma whose first | |
| 63 -- argument is a file pattern. Pat is this pattern string, which | |
| 64 -- contains an asterisk to correspond to the unit. Typ is one of | |
| 65 -- ('b'/'s'/'u') for body/spec/subunit, Dot is the separator string | |
| 66 -- for child/subunit names (default is "."), and Cas is one of | |
| 67 -- ('l'/'u'/'m') indicating the required case for the file name. | |
| 68 -- The default setting for Cas is 'l' if no parameter is present. | |
| 69 | |
| 70 Cursor : Natural; | |
| 71 -- Used to record the cursor value if a syntax error is found | |
| 72 | |
| 73 Syntax_Error_In_GNAT_ADC : exception; | |
| 74 -- Exception raised if a syntax error is found | |
| 75 | |
| 76 procedure Scan_SFN_Pragmas | |
| 77 (Source : String; | |
| 78 SFN_Ptr : Set_File_Name_Ptr; | |
| 79 SFNP_Ptr : Set_File_Name_Pattern_Ptr); | |
| 80 -- This is the procedure called to scan a gnat.adc file. The Source | |
| 81 -- parameter contains the full text of the file, with normal line end | |
| 82 -- characters, in the format normally read by the compiler. The two | |
| 83 -- parameters SFN_Ptr and SFNP_Ptr point to procedures that will be | |
| 84 -- called to register Source_File_Name pragmas as they are found. | |
| 85 -- | |
| 86 -- If a syntax error is found, then Syntax_Error_In_GNAT_ADC is raised, | |
| 87 -- and the location SFN_Scan.Cursor contains the approximate index of | |
| 88 -- the error in the source string. | |
| 89 -- | |
| 90 -- The scan assumes that it is dealing with a valid gnat.adc file, | |
| 91 -- that includes only pragmas and comments. It does not do a full | |
| 92 -- syntax correctness scan by any means, but if it does find anything | |
| 93 -- that it can tell is wrong it will immediately raise the exception | |
| 94 -- to indicate the approximate location of the error. | |
| 95 | |
| 96 end SFN_Scan; |