与大家分享我的工具箱中的一些小TOOLS
欢迎自由取用…… :-)
欢迎多提意见
waker615@gmail.com
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以下为函数的声明：
//-------------------------------------------------------------------------
// STRING
std::string& cut (std::string& s, const char ce =' '); // ce = "character of end"
std::string& trim(std::string& s); // trim all space both left and right
std::string& trimleft (std::string& s);
std::string& trimright(std::string& s);
std::string& toupper (std::string& s);
std::string& tolower(std::string& s);
std::string& format (std::string& s, const char* fmt, ...);
// replace all the old substring with the new one in the source string
std::string& replace(std::string& s, const std::string& oldS, const std::string& newS);
// split string to substrings by separator-string
std::vector<std::string>& split(const std::string& s, std::vector<std::string>& vs, const std::string& sep =";");
// join substrings to a big string separated by separator-string
std::string& join(const std::vector<std::string>& vs, std::string& s, const std::string& sep =";");
// get all substrings by two tags WITH tags from a source string
// e.g.
// s = <a href="someurl">Click Here</a>
// getDataByTags(s, vs, "<", ">"); then
// vs would hold two elemts:
// vs[0] = "<a href=\"someurl\">";
// vs[1] = "</a>";
bool getDataByTags(const std::string& s, std::vector<std::string >& tags,
const std::string& begTag, const std::string& endTag );
// get all substrings by two tags but WITHOUT tags from a source string
// e.g.
// s = <a href="someurl">Click Here</a>
// getDataByTags(s, vs, "<", ">"); then
// vs would hold two elemts:
// vs[0] = "a href=\"someurl\"";
// vs[1] = "/a";
bool getDataBetweenTags(const std::string& s, std::vector<std::string >& data,
const std::string& begTag, const std::string& endTag );
以下为函数的定义：
//-------------------------------------------------------------------------
// STRING
std::string& cut (std::string& s, const char ce)
{
std::string::iterator end = std::find(s.begin(), s.end(), ce);
return (s.assign(s.begin(), end));
}
std::string& trim(std::string& s)
{
std::string::iterator beg = s.begin();
while (beg != s.end() && ::isspace(*beg))
++beg;
std::string::reverse_iterator end = s.rbegin();
while (end != s.rend() && ::isspace(*end))
++end;
return s.assign(beg, end.base());
}
std::string& trimleft(std::string& s)
{
std::string::iterator it = s.begin();
while (it != s.end() && ::isspace(*it))
++it;
return s.assign(it, s.end());
}
std::string& trimright(std::string& s)
{
std::string::reverse_iterator it = s.rbegin();
while (it != s.rend() && ::isspace(*it))
++it;
return s.assign(s.begin(), it.base());
}
std::string& toupper(std::string& s)
{
typedef std::string::iterator SIT;
for (SIT it = s.begin(); it != s.end(); ++it)
{
*it = ::toupper(*it);
}
return s;
}
std::string& tolower(std::string& s)
{
typedef std::string::iterator SIT;
for (SIT it = s.begin(); it != s.end(); ++it)
{
*it = ::tolower(*it);
}
return s;
}
std::string& format(std::string& s, const char* fmt, ...)
{
const int MAX_LINE_LEN = 1024; // user defined
char buf[MAX_LINE_LEN] = {0};
va_list ap;
va_start(ap, fmt);
_vsnprintf(buf, MAX_LINE_LEN, fmt, ap);
va_end(ap);
return (s.assign(buf));
}
std::string& replace(std::string& s, const std::string& oldS, const std::string& newS)
{
if (std::string::npos == s.find(oldS)) return (s);
typedef std::string::size_type SST;
SST beg =0, tmp =0;
SST oldLen = oldS.size();
SST newLen = newS.size();
while (std::string::npos != (beg = (s.find(oldS, tmp))))
{
s.replace(beg, oldLen, newS);
tmp = beg + newLen;
std::cout << beg << "-" << tmp << ": " << s.c_str() << std::endl;
}
return (s);
}
std::string& join(const std::vector<std::string>& vs, std::string& s, const std::string& sep)
{
if (vs.empty()) return (s);
typedef std::vector<std::string>::const_iterator VSCIT;
for (VSCIT it = vs.begin(); it != vs.end(); ++ it)
{
s += *it;
s += sep;
}
return (s);
}
// bool split(const std::string& s, std::vector<std::string >& vs, const std::string& sep)
std::vector<std::string>& split(const std::string& s, std::vector<std::string>& vs, const std::string& sep)
{
if (s.empty())
return (vs);
if (sep.empty() || std::string::npos == s.find(sep))
{
vs.push_back(s);
return (vs);
}
typedef std::string::size_type SST;
SST seplen = sep.size();
SST beg =0, end =std::string::npos;
while ( std::string::npos != (end=s.find(sep, beg)) )
{
vs.push_back(s.substr(beg, end-beg));
beg = end+seplen;
}
vs.push_back(s.substr(beg, s.size()-beg));
return (vs);
}
bool getDataByTags(const std::string& s, std::vector<std::string >& tags,
const std::string& begTag, const std::string& endTag )
{
if (s.empty() || begTag.empty() || endTag.empty())
return false;
if (std::string::npos == s.find(begTag) ||
std::string::npos == s.find(endTag) )
{
return false;
}
typedef std::string::size_type SST;
SST beglen = begTag.size();
SST endlen = endTag.size();
SST beg =0, end =0;
tags.clear();
while ( std::string::npos != (beg=s.find(begTag, end)) )
{
if( std::string::npos != (end=s.find(endTag, beg+beglen)) )
{
end += endlen;
tags.push_back(s.substr(beg, end-beg));
}
else
break;
}
return true;
}
bool getDataBetweenTags(const std::string& s, std::vector<std::string >& data,
const std::string& begTag, const std::string& endTag )
{
if (s.empty() || begTag.empty() || endTag.empty())
return false;
if (std::string::npos == s.find(begTag) ||
std::string::npos == s.find(endTag) )
{
return false;
}
typedef std::string::size_type SST;
SST beglen = begTag.size();
SST endlen = endTag.size();
SST beg =0, end =0;
data.clear();
while ( std::string::npos != (beg=s.find(begTag, end)) )
{
if( std::string::npos != (end=s.find(endTag, beg+beglen)) )
{
data.push_back(s.substr(beg+beglen, end-beg-beglen));
end += endlen;
}
else
break;
}
return true;
}其实，toupper和tolower可以这样写：
std::string& toupper(std::string& s)
{
typedef std::string::iterator SIT;
for (SIT it = s.begin(); it != s.end(); ++it)
{
if (*it >= 'a' && *it <= 'z')
{
*it += 'A' - 'a';
}
}
return s;
}
std::string& tolower(std::string& s)
{
typedef std::string::iterator SIT;
for (SIT it = s.begin(); it != s.end(); ++it)
{
if (*it >= 'A' && *it <= 'Z')
{
*it += 'a' - 'A';
}
}
return s;
}上面是关于字符串的。其他的慢慢再帖……卖个关子先
呵呵……