Gamestudio Links
Zorro Links
Newest Posts
EXITRUN for TRADE
by jcl. 06/24/21 10:09
BarOffset for per-bar oversampling
by Sempervirens. 06/24/21 02:39
Players Health
by rayp. 06/23/21 19:04
Acknex-Configuration
by 3run. 06/21/21 16:39
What are you working on?
by rayp. 06/17/21 23:00
AUM Magazine
Latest Screens
Hecknex World
Scheherazade's Journey
Paradox Vector
The Space Between
Who's Online Now
7 registered members (Sempervirens, x34v, AndrewAMD, 3run, Quad, 2 invisible), 441 guests, and 5 spiders.
Key: Admin, Global Mod, Mod
Newest Members
damasceno, peterr991, fx2201, adaptivetrader, froglog
18656 Registered Users
Previous Thread
Next Thread
Print Thread
Rate Thread
strtok() returns temporary string #481174
08/10/20 11:10
08/10/20 11:10
Joined: May 2020
Posts: 27
Germany
M
Morris Offline OP
Newbie
Morris  Offline OP
Newbie
M

Joined: May 2020
Posts: 27
Germany
It appears that strtok() returns a temporary string which loses its correct value after several calls. The manual at https://manual.zorro-project.com/str_.htm points this out for other functions, but not for strtok(). Unless I am mistaken here, would you mind updating the manual?

Re: strtok() returns temporary string [Re: Morris] #481176
08/10/20 12:15
08/10/20 12:15
Joined: Feb 2017
Posts: 1,278
Chicago
AndrewAMD Online
Serious User
AndrewAMD  Online
Serious User

Joined: Feb 2017
Posts: 1,278
Chicago
Did you feed strtok a temporary string? It's better to use your own buffer.

I believe strtok actually modifies the original string that you supply, adding null terminators and pointing to a specific character in your supplied buffer to get substrings.

Re: strtok() returns temporary string [Re: Morris] #481179
08/10/20 14:31
08/10/20 14:31
Joined: Jul 2000
Posts: 27,536
Frankfurt
jcl Offline

Chief Engineer
jcl  Offline

Chief Engineer

Joined: Jul 2000
Posts: 27,536
Frankfurt
Yes, strtok modifies the string. It is a standard C function. Temporary strings are only used by specific lite-C string functions.

You can find the documentation about all standard C functions online or in a C book. It's there much more detailed than in the Zorro manual.

Re: strtok() returns temporary string [Re: Morris] #481180
08/10/20 15:31
08/10/20 15:31
Joined: May 2020
Posts: 27
Germany
M
Morris Offline OP
Newbie
Morris  Offline OP
Newbie
M

Joined: May 2020
Posts: 27
Germany
Thank you for your quick reply, gentlemen -- Andrew, yes, you are right, I did feed strtok() a temporary string. So it was the underlying temporary string that was modified outside of strtok(). All is well!


Moderated by  aztec, Inestical, Matt_Coles, Tobias 

Gamestudio download | chip programmers | Zorro platform | shop | Data Protection Policy

oP group Germany GmbH | Birkenstr. 25-27 | 63549 Ronneburg / Germany | info (at) opgroup.de

Powered by UBB.threads™ PHP Forum Software 7.7.1