CODEWITHSUNDEEP
c++stringparsingstrtok
dharag
dharag

Reputation: 299

Parsing string with strtok()

I'm trying to parse this line 

Completion_Time_Stamp = 2013-04-04@12:10:22(Eastern Daylight Time)

and put the name in one variable and value in another

token[0] = strtok(buf, " = "); // first token

if (token[0]) // zero if line is blank
{
  for (n = 1; n < 10; n++)
  {
    token[n] = strtok(0, " = "); // subsequent tokens
    if (!token[n]) break; // no more tokens
  }
}

Output : 

token[0] = Completion_Time_Stamp
token[1] = 2013-04-04@12:10:22(Eastern
token[2] = Daylight
token[3] = Time)

But I want something like this :

token[0] = Completion_Time_Stamp
token[1] = 2013-04-04@12:10:22(Eastern Daylight Time)

How do I achieve this ? Mutiple delimiters ??

Upvotes: 1

Views: 791

Answers (3)

taocp
taocp

Reputation: 23634

Use std::string, find with arguments "=", then using substring to get those 2 strings.

std::string str1 ="Completion_Time_Stamp = 2013-04-04@12:10:22(Eastern Daylight Time)";
std::string str2 = "=";
std::string part1="";
std::string part2="";

unsigned found = str1.find(str2);
if (found!=std::string::npos) 
{
   part1 = str1.substr(0,found-1);
   part2 = str1.substr(found+2);
}

cout << part1 << "\n" << part2 <<endl;

I got the following:

Completion_Time_Stamp//^^no space here and beginning of second part
2013-04-04@12:10:22(Eastern Daylight Time)

Upvotes: 0

StarPilot
StarPilot

Reputation: 2272

You should use just = as your delimiter, and then right trim and left trim your results to get rid of the trailing right space on token 0 and left space on token 1.

Upvotes: 1

Some programmer dude
Some programmer dude

Reputation: 409186

Why not use the functionality that already exists in std::string, like using find and substr.

Something like:

std::string str = "Completion_Time_Stamp = 2013-04-04@12:10:22(Eastern Daylight Time)";

auto delim_pos = str.find('=');

std::string keyword = str.substr(0, delim_pos);
std::string data = str.substr(delim_pos);

Note: The delimiter position (delim_pos in my example) may have to be adjusted when making the substrings.

Upvotes: 4

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