Little conversion problem - C / C++ / MFC Discussion Boards

Re: How to resolve this err.

SandipG 28-May-08 2:41

SandipG

28-May-08 2:41

for converting const strings to wide char you can just add L.
e.g. L"SomeText".

About Strtok

savitri28-May-08 1:32

savitri

28-May-08 1:32

Hi everybody..

I am doing project on gsm modem.i am reading msg from sim.that read message i want to store into database.for that i have split that sentence so please tell me how to do that.. i am doing like this..
char str[1000];
strcpy(str,m_sResults);
MessageBox(str);
char delims[] = ",";
char* result;
result = strtok( str, delims );

while(result != NULL )
{
MessageBox(result);

result = strtok( NULL, delims );

}
but doing like this is impossible to store the values.so i want to store in different variables.please help me out.
in m_sResults the sentence is
AT+CMGR=1

+CMGR: "REC READ","919860716641","P apu.soni","08/05/22,19:05:34+34",145,4,0,0,"919890081132",145,106
Call me when you reach to your pg... I on the way to room..

OK

please help me.

thanks in advance,
savitri Confused | :confused:

Re: About Strtok

Nibu babu thomas28-May-08 1:52

Nibu babu thomas

28-May-08 1:52

Don't use strtok since internally it uses a static buffer which will cause problem with calls from multiple threads or simultaneous calls on different strings.

Instead use strtok_s/_tcstok_s, a demo -> http://www.tenouk.com/cpluscodesnippet/viewtopic.php?p=474[^]

Use vector<string> to store strings that are tokenized by this function.

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: About Strtok

Graham Bradshaw28-May-08 13:06

Graham Bradshaw

28-May-08 13:06

Nibu babu thomas wrote:
cause problem with calls from multiple threads or simultaneous calls

Mutliple threads is OK, apparently. See http://msdn.microsoft.com/en-us/library/2c8d19sb(VS.71).aspx[^]

Re: About Strtok

Nibu babu thomas28-May-08 17:01

Nibu babu thomas

28-May-08 17:01

Graham Bradshaw wrote:
Mutliple threads is OK, apparently.

Thanks Graham!

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: About Strtok

bob1697228-May-08 2:07

bob16972

28-May-08 2:07

don't use the token related functions for delimited file streams as they are dumb when faced with somthing like...

One,Two,Three,,,Six,Seven,...

It treats the three consecutive commas as one which could lead to unexpected results if those delimiters should be treated as "nothing" values for their respective indexes.

Re: About Strtok

Jijo.Raj28-May-08 8:55

Jijo.Raj

28-May-08 8:55

You can also use stringstream to parse strings. Since I couldn't find a reference, i wrote a quick sample. Check it below.

#include "string"
#include "vector"
#include "sstream"
...

string sResult(_T("Hello,can,you,split,me?")); // Your result string.
istringstream ResultParser( sResult );  // Input string stream.

string sToken;
vector<string> vResults;

// Tokenize strings.
while ( getline( ResultParser, sToken, ',' ))
{
    // print tokens to console.
    vResults.push_back( sToken );
}</string>

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Little conversion problem

Ritxi28-May-08 1:18

Ritxi

28-May-08 1:18

Hi. I have a little question:

I need to convert a memory direction printed on a CString variable, to a LPVOID variable. Example:

CString auxstr;
auxstr.Format(_T("%p"),p_Stereo);  //p_Stereo is a pointer to a class

//In this point I have the pointer "saved" as a CString
//and now I want to retrieve the pointer in a LPVOID variable

LPVOID pointer = (LPVOID) ??????? variter->second.value;

I don't know how to convert this string to be able to cast it as a LPVOID. Anyone knows how? Thanks.

Ricard