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25 Commits

Author SHA1 Message Date
Daniel Dunbar
d65267ee62 Fix MemoryBuffer::getSTDIN to *not* return null if stdin is empty, this is a lame API. 
Also, Stringrefify some more MemoryBuffer functions, and add two performance FIXMEs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86630 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:43:58 +00:00
Duncan Sands
7127b13342 A value is only assigned to errno if NumRead equals -1, so do 
not reason based on errno if NumRead has a different value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86046 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-04 20:50:23 +00:00
Duncan Sands
954cb43c80 Make this code more robust by not thinking we are making progress 
if zero bytes were read.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85922 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 19:10:22 +00:00
Eli Friedman
96cd7af935 Tweak MemoryBuffer::getSTDIN so that it returns after the first EOF. 
It doesn't matter for piped input, but it's annoying when typing at the 
console.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71998 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-18 08:44:04 +00:00
Evan Cheng
e2b3fdd649 Switch from new[] + delete[] to malloc + free since llvm does not catch C++ exceptions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64448 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-13 08:24:55 +00:00
Evan Cheng
726135ad1a If new[] fails, return 0 rather then trying to dereference a null pointer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64444 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-13 07:54:34 +00:00
Evan Cheng
34cd4a484e Fix more -Wshorten-64-to-32 warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50659 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-05 18:30:58 +00:00
Gabor Greif
8811080a65 fcntl.h is pretty standard on unix (without the sys/) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50475 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-30 08:53:22 +00:00
Bill Wendling
a442006f48 Fix compilation errors on MSVC. Patch by Argiris Kirtzidis! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49055 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 22:09:20 +00:00
Chris Lattner
038112a4e0 Change the MemoryBuffer::getFile* methods to take just a pointer to the 
start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49041 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 18:04:03 +00:00
Chris Lattner
11da4cf25c Reimplement MemoryBuffer::getFile with three enhancements: 
1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49031 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:05:21 +00:00
Chris Lattner
37db5d67f9 Remove the MappedFile::charBase member, rename base -> getBase() and 
make getBase() return a const-correct pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49025 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:40:53 +00:00
Chris Lattner
bdbd2d710c Remove MappedFile support for mapping files for write and exec 
and shared.  This complicates the design, is not used, and probably
doesn't even work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49022 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:10:22 +00:00
Chris Lattner
4ee451de36 Remove attribution from file headers, per discussion on llvmdev. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 20:36:04 +00:00
Chris Lattner
2b1f1066ac Fix the Linker testcase regressions, by making MemoryBuffer::getFileOrSTDIN return 
a valid but empty buffer if stdin is empty.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44219 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-18 18:52:28 +00:00
Chris Lattner
3daae2701b Add new MemoryBuffer::getMemBufferCopy method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42815 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-09 21:46:38 +00:00
Reid Spencer
2372ccc111 Make getSTDIN return null if the standard input is empty, as the header file 
documentation implies and as its uses depend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40939 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 20:01:58 +00:00
Nick Lewycky
ea332946d3 Fix undefined behaviour reported by the new --enable-expensive-checks option. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37829 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-01 03:06:30 +00:00
Chris Lattner
a24b04e9e5 fix a memory leak 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36981 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 00:43:26 +00:00
Jeff Cohen
0fea8ebb4a Unbreak VC++ build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36901 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-07 15:21:46 +00:00
Chris Lattner
5499da8833 Enhance MemoryBuffer to return error messages in strings if they occur. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36899 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 23:32:36 +00:00
Chris Lattner
82e791dc42 Fix MemoryBuffer::getFile to return null if it has an error opening the 
file instead of aborting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36858 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 07:24:46 +00:00
Jeff Cohen
930c0fead9 Fix MemoryBuffer breakage correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36561 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-29 14:43:31 +00:00
Jeff Cohen
9bc406019e Unbreak build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36559 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-29 14:21:44 +00:00
Chris Lattner
333ffd4abf Add a new memorybuffer class, to unify all the file reading code in the system 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36553 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-29 06:58:52 +00:00