Added a new class, RegEx, it does extended regular expressions for now, more to

come.

1 files changed, 88 insertions, 0 deletions

diff --git a/src/regex.cpp b/src/regex.cpp
new file mode 100644
index 0000000..a9e09bb
--- /dev/null
+++ b/src/regex.cpp
@@ -0,0 +1,88 @@
+#include "bu/regex.h"
+
+#include <regex.h> // Please, please include the system regex.h file
+
+#define re ((regex_t *)pRegEx)
+#define aSubStr ((regmatch_t *)paSubStr)
+
+Bu::RegEx::RegEx() :
+        pRegEx( NULL ),
+        bCompiled( false ),
+        paSubStr( NULL )
+{
+}
+
+Bu::RegEx::RegEx( const Bu::FString &sSrc ) :
+        pRegEx( NULL ),
+        bCompiled( false ),
+        paSubStr( NULL )
+{
+        compile( sSrc );
+}
+
+Bu::RegEx::~RegEx()
+{
+        if( bCompiled )
+        {
+                regfree( re );
+                delete re;
+                delete[] aSubStr;
+        }
+}
+
+void Bu::RegEx::compile( const Bu::FString &sSrc )
+{
+        if( bCompiled )
+        {
+                regfree( re );
+                delete re;
+                delete[] aSubStr;
+                bCompiled = false;
+        }
+        pRegEx = (void *)(new regex_t);
+
+        int nErr = regcomp( re, sSrc.getStr(), REG_EXTENDED|REG_NEWLINE );
+        if( nErr )
+        {
+                size_t length = regerror( nErr, re, NULL, 0 );
+                char *buffer = new char[length];
+                (void) regerror( nErr, re, buffer, length );
+                Bu::FString s( buffer );
+                delete[] buffer;
+                throw "???"; // BuildException( s.getStr() );
+        }
+        bCompiled = true;
+        this->sSrc = sSrc;
+
+        nSubStr = re->re_nsub+1;
+        paSubStr = (void *)(new regmatch_t[nSubStr]);
+}
+
+int Bu::RegEx::getNumSubStrings()
+{
+        return nSubStr;
+}
+
+bool Bu::RegEx::execute( const Bu::FString &sSrc )
+{
+        sTest = sSrc;
+        if( regexec( re, sSrc.getStr(), nSubStr, aSubStr, 0 ) )
+                return false;
+        return true;
+}
+
+void Bu::RegEx::getSubStringRange( int nIndex, int &iStart, int &iEnd )
+{
+        iStart = aSubStr[nIndex].rm_so;
+        iEnd = aSubStr[nIndex].rm_eo;
+}
+
+Bu::FString Bu::RegEx::getSubString( int nIndex )
+{
+        regmatch_t *Subs = aSubStr;
+        return Bu::FString(
+                sTest.getStr()+aSubStr[nIndex].rm_so,
+                aSubStr[nIndex].rm_eo - aSubStr[nIndex].rm_so
+                );
+}
+