#include "StringUtils.h"
#include <string>
using namespace std;

void StringUtils::replaceAll(string& str, const string& pattern, const string& repl){
	const string::size_type PATTERN_LEN = pattern.length();
	const string::size_type REPL_LEN = repl.length();
	string::size_type pos = 0;
	while(((pos = str.find(pattern, pos)) != string::npos && pos < str.length() )){
		str.replace(pos, PATTERN_LEN, repl);
		pos += REPL_LEN;
	}
}

string StringUtils::replaceAllRet(const string& str, const string& pattern, const string& repl) {
	string str2 = str;
	replaceAll(str2, pattern, repl);
	return str2;
}

void StringUtils::deleteChunk(string& str, int start, int length){
	str.replace(start, length, "");
}

// chop last char (a la perl)
void StringUtils::chop(string& str){
	deleteChunk(str, str.length()-1);
}

void StringUtils::win2unixPath(string& winPath){
	replaceAll(winPath, "\\", "/");
}

void StringUtils::squeezeDuplicates(string& str, char squeeze) {
	const string SQUEEZE = string(2,squeeze);
	int oldlen = str.length()+1;
	while(oldlen > str.length()){
		oldlen = str.length();
		replaceAll(str, SQUEEZE, string(1,squeeze));
	}
}

void StringUtils::unix2winPath(string& unixPath){
	squeezeDuplicates(unixPath, '/');
	replaceAll(unixPath, "/", "\\");
}