Re: Regex Match() Abortion

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I am running the latest version of boost regex++, and I am running g++ 2.96 on Linux. I ran gdb, and I seemed to have narrowed down

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problem to c_str(), but this is not logical. Here is the part of my program:

I tried testing using the program below and it checked out fine with VC6, can you verify that this reproduces the problem? If not can you

Sorry, I didn't qualify my problem correctly. The problem comes in when the column list is too long, opposite of what you tested. Also, I doubt the problem is duplicable in such certain conditions, so if you want to try the full program, it will take about 5 minutes to download and test and then try the same test, except with the gibberish in the first ()'s and not the second ()'s. Code is here: http://www.myplaceonline.com/code/code.htm Just compile everything together and run ./try.cgi, and from there enter an sql string similar to (you'll also have to create a table first like this: "create table test (one int)"): insert into test (lkfsdjlkafdjklfsdajflkjfdklsjfsdlkjsfldkjfskldaj) values (1); When you go to download the code, the links are all to .htm files, so just take of the .htm, and you will get just the .cpp or .h files. This is the compile string I used: g++ tdbsql.cpp textdb.cpp textdbut.cpp $HOME/boost_1_29_0/libs/regex/build/gcc/libboost_regex.a /usr/lib/lib expat.a -I$HOME/boost_1_29_0 -o try.cgi -Wall You might just be able to take out both the .a files and the -I flag if everything is setup right on your Linux/Unix, but mine isn't. It is a very interesting problem, because essentially the create table syntax is almost the same, and when I try long delimited lists there, it works fine, but it randomly occurs for the insert syntax. I've tried everything to narrow down the problem, but it just makes no sense. It definitely occurs on RegeEx.Match(), but I can't figure out what is going wrong, that is why I posted here. It is something to do with RegEx, whether implicitly or explicitly is what I'm not sure of. The problem is just really confusing, and running gdb, like I said backtraces to a weird spot. It doesn't backtrace to c_str like I said below, what I meant by that is that if I run the gdb by stepping through each line, then right after the call is made to RegEx.Match() (then again, only in the case of the insert syntax does it fail), then there it goes into c_str and somewhere around there the abortion occurs. Hopefully you can help me with this. Thank you VERY MUCH for all your time and help, Kevin Grigorenko --- In Boost-Users@y..., "John Maddock" wrote: the please

submit one that does? If the issue is occuring in a call to c_str () can you verify that the argument is actually a valid string, and/or get a stack backtrace?

John Maddock http://ourworld.compuserve.com/homepages/john_maddock/index.htm

Here's my test code:

#include <iostream> #include "boost/cregex.hpp"

int main(int, char**) { std::string checks[] = { /* 0 */ "create table (_ID_) (\\(((\\s*,?\\s*(_ID_) (_TYPES_)( not null)?( unique)?( default ((\\d+(\\.\\d+)?)|(\"[^\"]*\")))?( unique)?\\s*)+)\\))", /* 1 */ "show tables", /* 2 */ "drop table (_ID_)", /* 3 */ "show tdb\\.xml", /* 4 */ "desc( table)? (_ID_)", /* 5 */ "alter table (_ID_) add( column)? ((_ID_) (_TYPES_)( not null)?( unique)?( default ((\\d+(\\.\\d+)?)|(\"[^\"]*\")))?( unique)?( first| after (_ID_))?)", /* 6 */ "alter table (_ID_) drop( column)? (_ID_)", /* 7 */ "alter table (_ID_) add( column)? \\(((\\s*,?\\s*(_ID_) (_TYPES_)( not null)?( unique)?( default ((\\d+(\\.\\d+)?)|(\"[^\"]*\")))?( unique)?( first| after (_ID_))?\\s*)+)\\)",/* 8 */ "rename table (_ID_) (to|as) (_ID_)",/* 9 */ "alter table (_ID_) alter( column)? (_ID_) (set default ((\\d+(\\.\\d+)?)|(\"[^\"]*\"))|drop default)", /* 10 */ "alter table (_ID_) modify( column)? ((_ID_) (_TYPES_) ( not null)?( unique)?( default ((\\d+(\\.\\d+)?)|(\"[^\"]*\")))?( unique)?( first| after (_ID_))?)", /* 11 */ "alter table (_ID_) change( column)? (_ID_) ((_ID_) (_TYPES_)( not null)?( unique)?( default ((\\d+(\\.\\d+)?)|(\"[^\"]*\")))?( unique)?( first| after (_ID_))?)", /* 12 */ "alter table (_ID_) rename( to| as) (_ID_)", /* 13 */ "insert( into)? (_ID_)( \\(((\\s*,?\\s*(_ID_)\\s*)+) \\))? values \\(\\)" };

int checksLength = sizeof checks / sizeof *checks; int i;

std::string sql = "insert into test (one,two,three) values ( aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb , cccccccccccccccccccccccccccccccccccccc)";

boost::RegEx sqlRegex; for(i=0;i