libi2ncommon: (gerd) initial submission, not in use yet

[libi2ncommon] / src / stringfunc.cpp

/***************************************************************************
                          escape.cpp  -  escaping of strings
                             -------------------
    begin                : Sun Nov 14 1999
    copyright            : (C) 1999 by Intra2net AG
    email                : info@intra2net.com
 ***************************************************************************/

#include <iostream>
#include <string>
#include <sstream>
#include <stdexcept>

#include <stdlib.h>
#include <iconv.h>
#include <i18n.h>

#include <stringfunc.hxx>

using namespace std;

std::string iso_to_utf8(const std::string& isostring)
{
    string result;
    
    iconv_t i2utf8 = iconv_open ("UTF-8", "ISO-8859-1");
    
    if (iso_to_utf8 == (iconv_t)-1)
        throw runtime_error("iconv can't convert from ISO-8859-1 to UTF-8");
        
    size_t in_size=isostring.size();
    size_t out_size=in_size*4;
    
    char *buf = (char *)malloc(out_size+1);
    if (buf == NULL)
        throw runtime_error("out of memory for iconv buffer");

    const char *in = isostring.c_str();
    char *out = buf;
    iconv (i2utf8, &in, &in_size, &out, &out_size);
            
    buf[isostring.size()*4-out_size]=0;
    
    result=buf;
                
    free(buf);
    iconv_close (i2utf8);
    
    return result;
}

std::string utf8_to_iso(const std::string& utf8string)
{
    string result;
    
    iconv_t utf82iso = iconv_open ("ISO-8859-1","UTF-8");
    
    if (utf82iso == (iconv_t)-1)
        throw runtime_error("iconv can't convert from UTF-8 to ISO-8859-1");
        
    size_t in_size=utf8string.size();
    size_t out_size=in_size;
    
    char *buf = (char *)malloc(out_size+1);
    if (buf == NULL)
        throw runtime_error("out of memory for iconv buffer");

    const char *in = utf8string.c_str();
    char *out = buf;
    iconv (utf82iso, &in, &in_size, &out, &out_size);
            
    buf[utf8string.size()-out_size]=0;
    
    result=buf;
                
    free(buf);
    iconv_close (utf82iso);

    return result;
}

std::string iso_to_html(const std::string& isostring)
{
    string result = isostring;
    
    replace_all (result, "&", "&amp;");
    replace_all (result, "\"", "&quot;");
    replace_all (result, "ä", "&auml;");
    replace_all (result, "ö", "&ouml;");
    replace_all (result, "ü", "&uuml;");
    replace_all (result, "Ä", "&Auml;");
    replace_all (result, "Ö", "&Ouml;");
    replace_all (result, "Ü", "&Uuml;");
    replace_all (result, "ß", "&szlig;");
    replace_all (result, "<", "&lt;");
    replace_all (result, ">", "&gt;");
    
    return result;
}

bool replace_all(string &base, const char *ist, const char *soll)
{
    string i=ist;
    string s=soll;
    return replace_all(base,&i,&s);
}

bool replace_all(string &base, const string &ist, const char *soll)
{
    string s=soll;
    return replace_all(base,&ist,&s);
}

bool replace_all(string &base, const string *ist, const string *soll)
{
    return replace_all(base,*ist,*soll);
}

bool replace_all(string &base, const char *ist, const string *soll)
{
    string i=ist;
    return replace_all(base,&i,soll);
}

bool replace_all(string &base, const string &ist, const string &soll)
{
    bool found_ist = false;
    string::size_type a=0;

    while((a=base.find(ist,a))!=string::npos)
    {
        base.replace(a,ist.size(),soll);
        a=a+soll.size();
        found_ist = true;
    }
    
    return found_ist;
}

string to_lower(const string &src)
{
    string dst = src;

    string::size_type pos = 0, end = dst.size();
    for (pos = 0; pos < end; pos++)
        dst[pos] = tolower(dst[pos]);

    return dst;
}

string to_upper(const string &src)
{
    string dst = src;

    string::size_type pos = 0, end = dst.size();
    for (pos = 0; pos < end; pos++)
        dst[pos] = toupper(dst[pos]);

    return dst;
}

string nice_unit_format (int input) {
    float size = input;
    int sizecount = 0;

    while (size > 1000) {
        size = size / 1000;
        sizecount++;
    }

    float tmp;                       // round
    tmp = size*10;
    tmp += 0.5;
    tmp = int (tmp);
    tmp = float(tmp)/float(10);
    size = tmp;

    ostringstream out;

    out.setf (ios::fixed);
    out.precision(2);
    switch (sizecount) {
    case 1:
        out << size << i18n(" KBytes");
        break;
    case 2:
        out << size << i18n(" MBytes");
        break;
    case 3:
        out << size << i18n(" Gbytes");
        break;
    default:
        out << size << i18n(" Bytes");
        break;
    }

    return out.str();
}