txt 2 re
knowing is obsolete :: regular expression generator (perl php python java javascript coldfusion c c++ ruby vb vbscript j# c# c++.net vb.net)
 
 
 
Enter the string that you want to use a regular expression on:
1
   
 
Select the elements that you want to extract to run regular expression generator:
2
0
c 0
d0
8
c 8
8
day08
int08
:
c :
D
c D
wD
e
c e
we
c
c c
wc
varDec
wordDec
monthDec
:
c :
2
c 2
d2
0
c 0
d0
1
c 1
d1
7
c 7
d7
day17
year2017
int2017
ddmmmyyyy08:Dec:2017
_
c _
ws_
"
c "
T
c T
wT
h
c h
wh
i
c i
wi
s
c 
ws
varThis
wordThis
_
c _
ws_
i
c i
wi
s
c s
ws
varis
wordis
_
c _
ws_
a
c a
wa
n
c n
wn
varan
wordan
_
c _
ws_
E
c E
wE
x
c x
wx
a
c a
wa
m
c m
wm
p
c p
wp
l
c l
wl
e
c e
we
varExample
wordExample
!
c !
"
c "
string"This_is_an_Example!"
< Source String
What to click?  extract any integer in this position
extract this integer (2006) in this position
 
3C regular expression program that extracts the selected elements from the entered string:
Perl PHP Python Java Javascript ColdFusion [C] C++ Ruby VB VBScript J#.net C#.net C++.net VB.net 
 
// URL that generated this code:
// http://txt2re.com/index-cpcre.php3?s=08:Dec:2017%20%22This%20is%20an%20Example!%22&-46&77

#include <stdio.h>
#include <string.h>
#include <pcre.h>

int main(int argc, char **argv)
{
  const char *error;
  int erroffset;
  int ovector[186];
  char re[8192]="";
  char txt[]="08:Dec:2017 \"This is an Example!\"";

  char re1[]=".*?";	// Non-greedy match on filler
  strcat(re,re1);
  char re2[]="(8)";	// Any Single Digit 1
  strcat(re,re2);
  char re3[]=".*?";	// Non-greedy match on filler
  strcat(re,re3);
  char re4[]=".";	// Uninteresting: c
  strcat(re,re4);
  char re5[]=".*?";	// Non-greedy match on filler
  strcat(re,re5);
  char re6[]=".";	// Uninteresting: c
  strcat(re,re6);
  char re7[]=".*?";	// Non-greedy match on filler
  strcat(re,re7);
  char re8[]=".";	// Uninteresting: c
  strcat(re,re8);
  char re9[]=".*?";	// Non-greedy match on filler
  strcat(re,re9);
  char re10[]=".";	// Uninteresting: c
  strcat(re,re10);
  char re11[]=".*?";	// Non-greedy match on filler
  strcat(re,re11);
  char re12[]=".";	// Uninteresting: c
  strcat(re,re12);
  char re13[]=".*?";	// Non-greedy match on filler
  strcat(re,re13);
  char re14[]=".";	// Uninteresting: c
  strcat(re,re14);
  char re15[]=".*?";	// Non-greedy match on filler
  strcat(re,re15);
  char re16[]=".";	// Uninteresting: c
  strcat(re,re16);
  char re17[]=".*?";	// Non-greedy match on filler
  strcat(re,re17);
  char re18[]=".";	// Uninteresting: c
  strcat(re,re18);
  char re19[]=".*?";	// Non-greedy match on filler
  strcat(re,re19);
  char re20[]=".";	// Uninteresting: c
  strcat(re,re20);
  char re21[]=".*?";	// Non-greedy match on filler
  strcat(re,re21);
  char re22[]=".";	// Uninteresting: c
  strcat(re,re22);
  char re23[]=".*?";	// Non-greedy match on filler
  strcat(re,re23);
  char re24[]=".";	// Uninteresting: c
  strcat(re,re24);
  char re25[]=".*?";	// Non-greedy match on filler
  strcat(re,re25);
  char re26[]=".";	// Uninteresting: c
  strcat(re,re26);
  char re27[]=".*?";	// Non-greedy match on filler
  strcat(re,re27);
  char re28[]=".";	// Uninteresting: c
  strcat(re,re28);
  char re29[]=".*?";	// Non-greedy match on filler
  strcat(re,re29);
  char re30[]=".";	// Uninteresting: c
  strcat(re,re30);
  char re31[]=".*?";	// Non-greedy match on filler
  strcat(re,re31);
  char re32[]="(.)";	// Any Single Character 1
  strcat(re,re32);

  pcre *r =  pcre_compile(re, PCRE_CASELESS|PCRE_DOTALL, &error, &erroffset, NULL);
  int rc = pcre_exec(r, NULL, txt, strlen(txt), 0, 0, ovector, 186);
  if (rc>0)
  {
      char d1[1024];
      pcre_copy_substring(txt, ovector, rc,1,d1, 1024);
      printf("(%s)",d1);
      char c1[1024];
      pcre_copy_substring(txt, ovector, rc,2,c1, 1024);
      printf("(%s)",c1);
      puts("\n");
  }
}

//-----
// C does not provide a regular expression feature as standard.
//
// To run this code you will need to first download and install
// the PCRE library from http://www.pcre.org/
//
// Note that on Linux systems PCRE is often already installed in /usr/lib/libpcre* or /usr/local/lib/libpcre*. 
//
// Compile and on Unix using:
// # gcc -lpcre x.c
// # ./a.out
//
 
 
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