Dirk Eddelbuettel wrote:
> On 4 February 2007 at 20:17, cstrato wrote:
> | I am currently learning how to create R packages using C++ classes.
>
> Congratulations :)
>
> [ This reminds me to email Oleg (CC'ed). Oleg, your HOWTO is a very useful.
> Would you consider adding a section on Dominick's most excellent RcppTemplate
> package which makes writing code to go back and forth between R and C++ soooo
> much easier? ]
>
> | For this purpose I have written a small package MyClass (which I try
> | to attach since I do not have access to a website).
> [...]
> | While I can compile and execute my package w/o problems on Fedora Core 4,
>
> Works for me too on Debian.
>
> [...]
> | > writeFileCpp("myout_fileCpp.txt")
> | [1] "outfile = myout_fileCpp.txt"
> | Writing file myout_fileCpp.txt using C++ style.
> | ---MyClassA::MyClassA()---------
> | ---MyClassA::WriteFileCpp---------
> |
> | *** caught bus error ***
> | address 0x6, cause 'non-existent physical address'
> |
> | Traceback:
> | 1: .C("WriteFileCpp", as.character(outfile), PACKAGE = "MyClass")
> | 2: writeFileCpp("myout_fileCpp.txt")
> |
> |
> | While I understand, that C++ iostreams are best avoided, since there is
> | no guarantee that the output will appear in the R console (as mentioned
> | on page 62 of R-exts.pdf), I do not understand why I cannot use ofstream,
> | which is isolated in a C++ method only.
> |
> | Is there a way how to use ofstream on MacOS X or is this a limit of the
> | current Mac implementation?
>
> Can you get to this in a debugger on MacOS X? Just glancing at your code I
> saw nothing obviously sticking out...
>
> Dirk
>
>
Dear Dirk
Thank you for your fast answer.
Sorrowly, I don´t know how to use a debugger on MacOS X, I am using
old-style print commands.
However, here is the output of the crash log from my Mac. Does it help?
**********
Host Name: coeurebooks-computer
Date/Time: 2007-02-04 18:51:50.233 +0100
OS Version: 10.4.8 (Build 8N1051)
Report Version: 4
Command: R
Path: /Library/Frameworks/R.framework/Resources/bin/exec/i386/R
Parent: bash [206]
Version: ??? (???)
PID: 1836
Thread: 0
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000006
Thread 0 Crashed:
0 libstdc++.6.dylib 0x020fe231 std::basic_ostream<char,
std::char_traits<char> >::flush() + 17 (ostream.tcc:395)
1 libstdc++.6.dylib 0x020fe358 std::basic_ostream<char,
std::char_traits<char>
>::sentry::sentry[in-charge](std::basic_ostream<char,
std::char_traits<char> >&) + 120 (ostream.tcc:56)
2 libstdc++.6.dylib 0x02100b5d std::basic_ostream<char,
std::char_traits<char> >& std::operator<< <std::char_traits<char>
>(std::basic_ostream<char, std::char_traits<char> >&, char const*) + 29
(ostream.tcc:620)
3 MyClass.so 0x0004a30f MyClassA::WriteFileCpp(char const*)
+ 335
4 MyClass.so 0x0004a6d0 WriteFileCpp + 80
5 libR.dylib 0x0106c701 do_dotCode + 7789 (dotcode.c:1732)
6 libR.dylib 0x01096a0f Rf_eval + 1530 (eval.c:445)
7 libR.dylib 0x01098b43 do_set + 561 (eval.c:1357)
8 libR.dylib 0x010968b4 Rf_eval + 1183 (eval.c:431)
9 libR.dylib 0x01098be1 do_begin + 62 (eval.c:1108)
10 libR.dylib 0x010968b4 Rf_eval + 1183 (eval.c:431)
11 libR.dylib 0x01099fd6 Rf_applyClosure + 688 (eval.c:614)
12 libR.dylib 0x01096725 Rf_eval + 784 (eval.c:455)
13 libR.dylib 0x010b458c Rf_ReplIteration + 396 (main.c:256)
14 libR.dylib 0x010b48f3 R_ReplConsole + 148 (main.c:306)
15 libR.dylib 0x010b4c30 run_Rmainloop + 91 (main.c:945)
16 libR.dylib 0x010b4c4b Rf_mainloop + 16 (main.c:952)
17 R 0x00001f64 main + 54 (Rmain.c:35)
18 R 0x00001f12 _start + 216
19 R 0x00001e39 start + 41
Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x00000012 ebx: 0x0004a1cb ecx: 0x0214f178 edx: 0x00000000
edi: 0xbfffe568 esi: 0x0214f178 ebp: 0xbfffe508 esp: 0xbfffe4f0
ss: 0x0000001f efl: 0x00010286 eip: 0x020fe231 cs: 0x00000017
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
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Best regards
Christian
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