1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- T R E E _ I O -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2013, 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. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package contains the routines used to read and write the tree files 33-- used by ASIS. Only the actual read and write routines are here. The open, 34-- create and close routines are elsewhere (in Osint in the compiler, and in 35-- the tree read driver for the tree read interface). 36 37with Types; use Types; 38with System; use System; 39 40pragma Warnings (Off); 41-- This package is used also by gnatcoll 42with System.OS_Lib; use System.OS_Lib; 43pragma Warnings (On); 44 45package Tree_IO is 46 47 Tree_Format_Error : exception; 48 -- Raised if a format error is detected in the input file 49 50 ASIS_Version_Number : constant := 33; 51 -- ASIS Version. This is used to check for consistency between the compiler 52 -- used to generate trees and an ASIS application that is reading the 53 -- trees. It must be incremented whenever a change is made to the tree 54 -- format that would result in the compiler being incompatible with an 55 -- older version of ASIS. 56 -- 57 -- 27 Changes in the tree structures for expression functions 58 -- 28 Changes in Snames 59 -- 29 Changes in Sem_Ch3 (tree copying in case of discriminant constraint 60 -- for concurrent types). 61 -- 30 Add Check_Float_Overflow boolean to tree file 62 -- 31 Remove read/write of Debug_Pragmas_Disabled/Debug_Pragmas_Enabled 63 -- 32 Change the way entities are changed through Next_Entity field in 64 -- the hierarchy of child units 65 -- 33 Add copying subtrees for rewriting infix calls of operator 66 -- functions for the corresponding original nodes. 67 68 procedure Tree_Read_Initialize (Desc : File_Descriptor); 69 -- Called to initialize reading of a tree file. This call must be made 70 -- before calls to Tree_Read_xx. No calls to Tree_Write_xx are permitted 71 -- after this call. 72 73 procedure Tree_Read_Data (Addr : Address; Length : Int); 74 -- Checks that the Length provided is the same as what has been provided 75 -- to the corresponding Tree_Write_Data from the current tree file, 76 -- Tree_Format_Error is raised if it is not the case. If Length is 77 -- correct and non zero, reads Length bytes of information into memory 78 -- starting at Addr from the current tree file. 79 80 procedure Tree_Read_Bool (B : out Boolean); 81 -- Reads a single boolean value. The boolean value must have been written 82 -- with a call to the Tree_Write_Bool procedure. 83 84 procedure Tree_Read_Char (C : out Character); 85 -- Reads a single character. The character must have been written with a 86 -- call to the Tree_Write_Char procedure. 87 88 procedure Tree_Read_Int (N : out Int); 89 -- Reads a single integer value. The integer must have been written with 90 -- a call to the Tree_Write_Int procedure. 91 92 procedure Tree_Read_Str (S : out String_Ptr); 93 -- Read string, allocate on heap, and return pointer to allocated string 94 -- which always has a lower bound of 1. 95 96 procedure Tree_Read_Terminate; 97 -- Called after reading all data, checks that the buffer pointers is at 98 -- the end of file, raising Tree_Format_Error if not. 99 100 procedure Tree_Write_Initialize (Desc : File_Descriptor); 101 -- Called to initialize writing of a tree file. This call must be made 102 -- before calls to Tree_Write_xx. No calls to Tree_Read_xx are permitted 103 -- after this call. 104 105 procedure Tree_Write_Data (Addr : Address; Length : Int); 106 -- Writes Length then, if Length is not null, Length bytes of data 107 -- starting at Addr to current tree file 108 109 procedure Tree_Write_Bool (B : Boolean); 110 -- Writes a single boolean value to the current tree file 111 112 procedure Tree_Write_Char (C : Character); 113 -- Writes a single character to the current tree file 114 115 procedure Tree_Write_Int (N : Int); 116 -- Writes a single integer value to the current tree file 117 118 procedure Tree_Write_Str (S : String_Ptr); 119 -- Write out string value referenced by S (low bound of S must be 1) 120 121 procedure Tree_Write_Terminate; 122 -- Terminates writing of the file (flushing the buffer), but does not 123 -- close the file (the caller is responsible for closing the file). 124 125end Tree_IO; 126