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Groups > comp.lang.c++ > #83717
| From | Paavo Helde <eesnimi@osa.pri.ee> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: getline() problem |
| Date | 2022-04-25 14:33 +0300 |
| Organization | A noiseless patient Spider |
| Message-ID | <t460us$vva$1@dont-email.me> (permalink) |
| References | <t41bp7$35ldb$1@portraits.wsisiz.edu.pl> <t45tt4$13nqh$1@portraits.wsisiz.edu.pl> |
25.04.2022 13:41 Jivanmukta kirjutas:
> W dniu 23.04.2022 o 19:07, Jivanmukta pisze:
>> I have a text file (with PHP source code) containing such two lines:
>>
>> SebastianBergmann\Diff\Line\00content";s:7:"2222222";}}}}}}
>> EOL;
>>
>> I need to read the line into variable: string line. I wrote:
>>
>> getline(in_file, line);
>>
>> The problem is that in variable line I receive:
>>
>> ...\Diff\Line:"LineEOL;
>>
>> I think problem is with \00 characters, probably getline() does not
>> read it correctly.
>>
>> How to read it correctly in my C++ program?
>
> I want to check if a file contains NUL character.
>
> inline std::string file_get_contents(const std::string &file_path) { //
> a la PHP
> std::ifstream fin(file_path);
> std::stringstream buffer;
> buffer << fin.rdbuf();
> return buffer.str();
> }
> ...
> for (char c : file_get_contents(file)) {
> if (c == '\0') {
> m += "File " + file + " should not contain NUL character
> (ASCII 0). ";
> }
> }
>
> This solution does not work.
> How to do it?
One possibility is that your file contains other special characters
besides NUL and gets truncated when read in text mode. If so, you should
open it in binary mode.
You should also check that the file opening and reading succeeded:
inline std::string file_get_contents(const std::string& file_path) {
std::ifstream fin(file_path, std::ios::binary);
if (!fin) {
throw std::runtime_error("Cannot open: " + file_path);
}
std::stringstream buffer;
if (!(buffer << fin.rdbuf())) {
throw std::runtime_error("Cannot read: " + file_path);
}
return buffer.str();
}
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getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-23 19:07 +0200
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-23 10:17 -0700
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-23 19:40 +0200
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-23 19:59 +0200
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-23 21:47 +0300
Re: getline() problem Juha Nieminen <nospam@thanks.invalid> - 2022-04-25 06:00 +0000
Re: getline() problem Öö Tiib <ootiib@hot.ee> - 2022-04-25 00:12 -0700
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 11:40 +0300
Re: getline() problem James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-25 11:37 -0400
Re: getline() problem Vir Campestris <vir.campestris@invalid.invalid> - 2022-04-25 16:54 +0100
Re: getline() problem James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-25 12:29 -0400
Re: getline() problem scott@slp53.sl.home (Scott Lurndal) - 2022-04-25 17:29 +0000
Re: getline() problem Manfred <noname@add.invalid> - 2022-04-25 20:17 +0200
Re: getline() problem Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-04-25 10:19 -0700
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 10:41 -0700
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 21:58 +0300
Re: getline() problem scott@slp53.sl.home (Scott Lurndal) - 2022-04-25 15:56 +0000
Re: getline() problem James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-25 13:12 -0400
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 11:03 -0700
Re: getline() problem scott@slp53.sl.home (Scott Lurndal) - 2022-04-25 19:05 +0000
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 12:48 -0700
Re: getline() problem Ben <ben.usenet@bsb.me.uk> - 2022-04-25 21:46 +0100
Re: getline() problem Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 05:43 +0000
Re: getline() problem David Brown <david.brown@hesbynett.no> - 2022-04-26 09:36 +0200
Re: getline() problem Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 09:18 +0000
Re: getline() problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-26 02:47 -0700
Re: getline() problem Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 11:06 +0000
Re: getline() problem David Brown <david.brown@hesbynett.no> - 2022-04-26 15:52 +0200
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-26 07:04 -0700
Re: getline() problem Manfred <noname@add.invalid> - 2022-04-26 16:49 +0200
Re: getline() problem James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-26 12:01 -0400
Re: getline() problem James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-26 11:49 -0400
Re: getline() problem Manfred <noname@add.invalid> - 2022-04-25 20:23 +0200
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 10:33 -0700
Re: getline() problem "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2022-04-25 10:52 -0700
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 11:08 -0700
Re: getline() problem "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2022-04-25 21:18 -0700
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 22:04 -0700
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 22:06 +0300
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-25 13:02 -0700
Re: getline() problem Barry Schwarz <schwarzb@delq.com> - 2022-04-23 12:54 -0700
Re: getline() problem Montmorency <none@none.com> - 2022-04-23 14:45 -0700
Re: getline() problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-23 16:49 -0700
Re: getline() problem Ben <ben.usenet@bsb.me.uk> - 2022-04-24 01:04 +0100
Re: getline() problem Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-04-23 18:24 -0700
Re: getline() problem Ben <ben.usenet@bsb.me.uk> - 2022-04-24 03:16 +0100
Re: getline() problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-24 22:51 -0700
Re: getline() problem Ben <ben.usenet@bsb.me.uk> - 2022-04-25 11:07 +0100
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-23 17:15 -0700
Re: getline() problem Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-23 18:23 -0700
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-24 05:28 +0200
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-25 12:41 +0200
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 14:33 +0300
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-25 18:53 +0200
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 22:08 +0300
Re: getline() problem Jivanmukta <jivanmukta@poczta.onet.pl> - 2022-04-26 09:01 +0200
Re: getline() problem Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-26 11:15 +0300
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