summaryrefslogtreecommitdiff
path: root/gcc/ada/s-valrea.ads
diff options
context:
space:
mode:
authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/ada/s-valrea.ads
downloadcbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2
cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository.
Diffstat (limited to 'gcc/ada/s-valrea.ads')
-rw-r--r--gcc/ada/s-valrea.ads70
1 files changed, 70 insertions, 0 deletions
diff --git a/gcc/ada/s-valrea.ads b/gcc/ada/s-valrea.ads
new file mode 100644
index 000000000..637e70ae2
--- /dev/null
+++ b/gcc/ada/s-valrea.ads
@@ -0,0 +1,70 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . V A L _ R E A L --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+package System.Val_Real is
+ pragma Pure;
+
+ function Scan_Real
+ (Str : String;
+ Ptr : not null access Integer;
+ Max : Integer) return Long_Long_Float;
+ -- This function scans the string starting at Str (Ptr.all) for a valid
+ -- real literal according to the syntax described in (RM 3.5(43)). The
+ -- substring scanned extends no further than Str (Max). There are three
+ -- cases for the return:
+ --
+ -- If a valid real is found after scanning past any initial spaces, then
+ -- Ptr.all is updated past the last character of the real (but trailing
+ -- spaces are not scanned out).
+ --
+ -- If no valid real is found, then Ptr.all points either to an initial
+ -- non-blank character, or to Max + 1 if the field is all spaces and the
+ -- exception Constraint_Error is raised.
+ --
+ -- If a syntactically valid real is scanned, but the value is out of
+ -- range, or, in the based case, the base value is out of range or there
+ -- is an out of range digit, then Ptr.all points past the real literal,
+ -- and Constraint_Error is raised.
+ --
+ -- Note: these rules correspond to the requirements for leaving the
+ -- pointer positioned in Text_Io.Get
+ --
+ -- Note: if Str is null, i.e. if Max is less than Ptr, then this is a
+ -- special case of an all-blank string, and Ptr is unchanged, and hence
+ -- is greater than Max as required in this case.
+
+ function Value_Real (Str : String) return Long_Long_Float;
+ -- Used in computing X'Value (Str) where X is a floating-point type or an
+ -- ordinary fixed-point type. Str is the string argument of the attribute.
+ -- Constraint_Error is raised if the string is malformed, or if the value
+ -- out of range of Long_Long_Float.
+
+end System.Val_Real;