https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118693
Bug ID: 118693
Summary: istream& getline (istream& is, string& str, char
delim) does not return with long input
Product: gcc
Version: 14.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: [email protected]
Target Milestone: ---
Created attachment 60314
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60314&action=edit
Test program, .s, .ii files, compiler command and output, sample ouptut.
Hi,
In c++, the function
istream& getline (istream& is, string& str, char delim)
doesn't return when"
1) delim is '>', and
2) The input to stream "is" consists of 'A' repeated 4926 times followed by
'>'.
In this case, the size of str is usually around 4096 instead of the expected
value of 4926.
However, getline() does return if either:
1) The input consists of 'A' repeated 2000 times followed by '>'. In this
case, the size of str is 2000, as expected.
2) The input consists of 'A' repeated 4926 followed by ">\n>". In this case,
the size of str is usually around 4096 instead of the expected value of 4926.
I've attached testDecludeFilter.tar.gz that contains:
1) The test program testGetline.cpp. Run the test by running testGetline,
and providing the input by cutting the specified number of 'A' characters from
a file, and pasting.
2) Compiler command.
3) Compiler output.
4) .s and .ii files.
5) Input and output with 4926 'A' characters.
For me a satisfactory solution would be to change the documentation of
getline() to state that the input must not exceed a value before the delim
character. However, that might not satisfy everyone.
Thanks,
Alban
