About the Pcre regular expression library Libpcre

The header file for STD regex is already included in GCC 4.8

But there is no implementation, so the link is a failure

GCC 4.9 fully supports the Regex of C + + 11.

Before 4.9, you can seek a boost for the regex.

However, I am more familiar with the implementation of Pcre, Perl-based regular expressions.

Download source code, unzip

Configure the library to cross-compile, generate only static libraries, and configure the Pcre code as follows:

#!/bin/SHExport RootDir="${pwd}"CD Pcre-8.36/Export Cross_compile="Arm-linux-androideabi"Export AR=${cross_compile}-arExport as=${cross_compile}-Asexport LD=${cross_compile}-LDExport Ranlib=${cross_compile}-Ranlibexport CC=${cross_compile}-GCCExport CXX=${cross_compile}-g++Export NM=${cross_compile}-nm./configure--prefix=${rootdir}/build/pcre--target=${cross_compile}--host=${cross_compile}--build=i686-linux-- Disable-shared

Perform make && make install build target file

Next we start using the Libpcre library

Enumerate all matching items and print the results, with the following code:

1#include"pcre.h"2#include <string>3#include <vector>4#include <iostream>5 6 intMainvoid)7 {8     Const intOveccount = -; 9STD::stringSrc_string ="saturday=6 and sunday=7, but some fridays=5 joke=102 also.";TenSTD::stringRegex_string ="\\w+=\\d+"; One     BOOLB_case =false; A  -     Const Char*error; -     intErroffset; the     intOvector[oveccount]; -STD::VECTOR&LT;STD::string>sfinds; -pcre* re = Pcre_compile (Regex_string.c_str (), b_case? Pcre_caseless:0, -&error, &Erroffset, NULL); +     if(RE) -     {    +Unsignedintoffset =0;  AUnsignedintLen =src_string.size (); at         Const Char* str =src_string.c_str (); -         intrc =0; -          while(Offset < len && (rc = pcre_exec (RE),0, str, Len, offset,0, Ovector, Oveccount)) >=0) -         { -Std::cout <<"Find Count:"<< RC <<Std::endl; -              for(inti =0; I < RC; ++i) in             { -                 intS_len = ovector[2*i+1]-ovector[2*i]; toSTD::stringSfind = Src_string.substr (ovector[2*i], s_len); + Sfinds.push_back (sfind); -             } theoffset = ovector[1]; *         } $         Panax Notoginseng Pcre_free (re); -     }    the  +      for(size_t i =0; I < sfinds.size (); ++i) AStd::cout <<"*"<<sfinds[i] <<"* "; theStd::cout <<Std::endl; +  -     return 0; $}

Compile and run regex with the output as:

Find Count:1
Find Count:1
Find Count:1
Find Count:1
*saturday=6* *sunday=7* *fridays=5* *joke=102*

About the Pcre regular expression library Libpcre