ut_string_class.h

Go to the documentation of this file.

// ut_string_class.h
//
// A simple string class for use where templates are not
// allowed.
//
#ifndef UT_STRING_CLASS_H
#define UT_STRING_CLASS_H

//
// Copyright (C) 2001 Mike Nordell <tamlin@algonet.se>
// Copyright (C) 2001 Dom Lachowicz <dominicl@seas.upenn.edu>
// Copyright (C) 2002 Tomas Frydrych <tomas@frydrych.uklinux.net> 
// 
// This class is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This class is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  
// 02111-1307, USA.
//

#include <stdlib.h>
#include <stdarg.h>

#if defined(__MINGW32__)
#undef snprintf
#define _GLIBCXX_USE_C99_DYNAMIC 1
#endif

#include <string>

/* pre-emptive dismissal; ut_types.h is needed by just about everything,
 * so even if it's commented out in-file that's still a lot of work for
 * the preprocessor to do...
 */
#ifndef UT_TYPES_H
#include "ut_types.h"
#endif
#include "ut_string.h"
#include "ut_stringbuf.h"

// Forward declarations
class UT_ByteBuf;
class UT_UCS4_mbtowc;
class UT_String;
class UT_UTF8String;
class UT_UCS4String;

class ABI_EXPORT UT_GenericBase
{
public:
    virtual const char *    GenericBaseID () const = 0;

    virtual ~UT_GenericBase () { }
};

// yes, this is screaming for a template

//
//  8-bit string
//
//  String is built of 8-bit units (bytes)
//  Encoding could be any single-byte or multi-byte encoding
//

//  UT_String, a simple wrapper for zero terminated 'char' strings.
//
class ABI_EXPORT UT_String
{
public:
    UT_String();
    UT_String(const char* sz, size_t n = 0 /* 0 == zero-terminate */);
    UT_String(const UT_String& rhs);
    UT_String(const std::basic_string<char> &s);
    ~UT_String();

    size_t      size() const;
    size_t length () const { return size () ; }
    void            reserve(size_t n);
    bool        empty() const;
    void        clear() const;

    UT_String   substr(size_t iStart, size_t nChars) const;

    UT_String&  operator=(const UT_String& rhs);
    UT_String&  operator=(const char*      rhs);
    UT_String&  operator+=(const UT_String& rhs);
    UT_String&  operator+=(const char*      rhs);
    UT_String&  operator+=(char rhs);

    char        operator[](size_t iPos) const;
    char&       operator[](size_t iPos);

    void        swap(UT_String& rhs);

    // The returned pointer is valid until the next non-const
    // operation. You will _always_ get a legal pointer back,
    // even if to an empty string.
    const char* c_str() const;

private:
    class UT_StringImpl<char>* pimpl;
};

// helpers
ABI_EXPORT bool operator==(const UT_String& s1, const UT_String& s2);
ABI_EXPORT bool operator==(const UT_String& s1, const char*      s2);
ABI_EXPORT bool operator==(const char*      s1, const UT_String& s2);
ABI_EXPORT bool operator!=(const UT_String& s1, const UT_String& s2);
ABI_EXPORT bool operator!=(const UT_String& s1, const char*      s2);
ABI_EXPORT bool operator!=(const char*      s1, const UT_String& s2);

ABI_EXPORT UT_uint32 hashcode(const UT_String& string);
ABI_EXPORT UT_uint32 hashcode(const char *s);

// strcmp ordering
ABI_EXPORT bool operator<(const UT_String& s1, const UT_String& s2);

ABI_EXPORT UT_String operator+(const UT_String& s1, const UT_String& s2);

ABI_EXPORT size_t UT_String_findCh(const UT_String &st, char ch);
ABI_EXPORT size_t UT_String_findRCh(const UT_String &st, char ch);

/****************************************************************************/

ABI_EXPORT UT_String& UT_String_sprintf(UT_String & inStr, const char * inFormat, ...);
ABI_EXPORT UT_String& UT_String_vprintf (UT_String & inStr, const char *format,
                   va_list      args1);
ABI_EXPORT UT_String& UT_String_vprintf (UT_String & inStr, const UT_String & format,
                     va_list      args1);

ABI_EXPORT UT_String UT_String_sprintf(const char * inFormat, ...);
ABI_EXPORT UT_String UT_String_vprintf(const char * inFormat, va_list args1);
ABI_EXPORT UT_String UT_String_vprintf(const UT_String & inFormat, va_list args1);

/***************************************************************************/

/***************************************************************************/
ABI_EXPORT UT_String UT_String_getPropVal(const UT_String & sPropertyString, const UT_String & sProp);
ABI_EXPORT void UT_String_removeProperty(UT_String & sPropertyString, const UT_String & sProp);
ABI_EXPORT void UT_String_setProperty(UT_String & sPropertyString, const UT_String &sProp, const UT_String & sVal);
ABI_EXPORT void UT_String_addPropertyString(UT_String & sPropertyString, const UT_String & sNewProp);

//
//  UTF-8 string: encoding is *always* UTF-8
//

//  UT_UTF8String, a simple wrapper for zero terminated 'UTF-8' strings.
//

class ABI_EXPORT UT_UTF8String : public UT_GenericBase
{
public:
    virtual const char *    GenericBaseID () const;

    UT_UTF8String ();
    UT_UTF8String (const char * sz, size_t n = 0 /* 0 == null-termination */);
    UT_UTF8String (const char *sz, const char *encoding);

    UT_UTF8String (const UT_UTF8String & rhs);
    UT_UTF8String (const UT_UCS4String & rhs);
    UT_UTF8String (const UT_UCSChar * sz, size_t n = 0 /* 0 == zero-terminate */);

    ~UT_UTF8String ();

    size_t      size () const;
    size_t length () const { return size () ; }

    void            reserve(size_t n);
    bool        empty () const;
    void        clear () const;
    size_t      byteLength() const;
    void        dump(void) const;
    UT_UTF8String   substr(size_t iStart, size_t nChars) const;

    UT_UTF8String & operator=(const char *          rhs);
    UT_UTF8String & operator=(const std::string &   rhs);
    UT_UTF8String & operator=(const UT_UTF8String & rhs);
    UT_UTF8String & operator=(const UT_UCS4String & rhs);

    UT_UTF8String & operator+=(const UT_UCS4Char     rhs);
    UT_UTF8String & operator+=(const char *          rhs);
    UT_UTF8String & operator+=(const std::string &   rhs);
    UT_UTF8String & operator+=(const UT_UTF8String & rhs);
    UT_UTF8String & operator+=(const UT_UCS4String & rhs);  

    // The returned pointer is valid until the next non-const
    // operation. You will _always_ get a legal pointer back,
    // even if to an empty (0) string.
    const char * utf8_str () const; 
    UT_UCS4String ucs4_str ();

    void        assign (const char * sz, size_t n = 0 /* 0 == null-termination */);
    void        append (const char * sz, size_t n = 0 /* 0 == null-termination */);
    void        appendBuf (const UT_ByteBuf & buf, UT_UCS4_mbtowc & converter);

    void        appendUCS4 (const UT_UCS4Char * sz, size_t n = 0 /* 0 == null-termination */);
    void        appendUCS2 (const UT_UCS2Char * sz, size_t n = 0 /* 0 == null-termination */);

    const UT_UTF8String & escape (const UT_UTF8String & str1,
                      const UT_UTF8String & str2);  // replaces <str1> with <str2> in the current string
    const UT_UTF8String & escapeXML ();  // escapes '<', '>', '"', & '&' in the current string
    const UT_UTF8String & decodeXML ();  // unescapes '<', '>', '"', & '&' in the current string
    const UT_UTF8String & escapeMIME (); // translates the current string to MIME "quoted-printable" format
    const UT_UTF8String & lowerCase ();  // forces current string to lowercase
    const UT_UTF8String & escapeURL ();  // make URL confirm to RFC 1738
    const UT_UTF8String & decodeURL ();  
    
    /* UTF8String - NOTES
     * 
     * TODO:
     * 1. Maybe have a search&replace function, something like:
     * 
     *  int replace (const char * utf_newstr, const char * utf_oldstr);
     * 
     *    which could be used to do substitutions, e.g.:
     * 
     *  UTF8String xmlstr = "expr: if ((c > 0) && (c < 0x80)) return c;";
     *  xmlstr.replace ("&lt;", "<");
     *  xmlstr.replace ("&gt;", ">");
     *  xmlstr.replace ("&amp;","&");
     * 
     * getIterator:
     * returns a home-made iterator associated with the UTF-8 string, e.g.:
     * 
     *  UTF8String str = "This is a UTF-8 string.";
     *  UT_UTF8Stringbuf::UTF8Iterator & iter = str.getIterator ();
     *  iter = iter.start (); // iter.start() returns 0 if no string, so:
     *  if (iter.current ())
     *  {
     *      while (true)
     *      {
     *          char * pUTF = iter.current ();
     *          if (*pUTF == 0) break; // end-of-string
     *          // etc.
     *          iter.advance (); // or ++iter;
     *      }
     *  }
     * 
     * The iterator will be well behaved provided the string is not being edited.
     */
    UT_UTF8Stringbuf::UTF8Iterator getIterator () const
    {
        return UT_UTF8Stringbuf::UTF8Iterator(pimpl);
    }

private:
    class UT_UTF8Stringbuf * pimpl;
};

ABI_EXPORT bool operator<(const UT_UTF8String& s1, const UT_UTF8String& s2);
ABI_EXPORT bool operator==(const UT_UTF8String& s1, const UT_UTF8String& s2);
ABI_EXPORT bool operator!=(const UT_UTF8String& s1, const UT_UTF8String& s2);
ABI_EXPORT bool operator==(const UT_UTF8String& s1, const char * s2);
ABI_EXPORT bool operator!=(const UT_UTF8String& s1, const char * s2);
ABI_EXPORT bool operator==(const UT_UTF8String& s1, const std::string & s2);
ABI_EXPORT bool operator!=(const UT_UTF8String& s1, const std::string & s2);
ABI_EXPORT bool operator==(const std::string & s2, const UT_UTF8String& s1);
ABI_EXPORT bool operator!=(const std::string & s2, const UT_UTF8String& s1);
ABI_EXPORT UT_UTF8String operator+(const UT_UTF8String & s1, const UT_UTF8String & s2);
ABI_EXPORT UT_UTF8String UT_UTF8String_sprintf(const char * inFormat, ...);
ABI_EXPORT UT_UTF8String & UT_UTF8String_sprintf(UT_UTF8String & inStr, const char * inFormat, ...);


/***************************************************************************/
ABI_EXPORT UT_UTF8String UT_UTF8String_getPropVal(const UT_UTF8String & sPropertyString, const UT_UTF8String & sProp);

ABI_EXPORT void UT_UTF8String_removeProperty(UT_UTF8String & sPropertyString, const UT_UTF8String & sProp);

ABI_EXPORT void UT_UTF8String_setProperty(UT_UTF8String & sPropertyString, const UT_UTF8String &sProp, const UT_UTF8String & sVal);

ABI_EXPORT void UT_UTF8String_addPropertyString(UT_UTF8String & sPropertyString, const UT_UTF8String & sNewProp);

//
//  UCS-4 string
//
//  String is built of 32-bit units (longs)
//
//  NOTE: Ambiguity between UCS-2 and UTF-16 above makes no difference
//  NOTE:  in the case of UCS-4 and UTF-32 since they really are
//  NOTE:  identical
//

//  UT_UCS4String, a simple wrapper for zero terminated 'UCS4' strings.
//

// TODO: add c_str(), encoded_str(const char * to)

class ABI_EXPORT UT_UCS4String
{
public:
    UT_UCS4String();
    UT_UCS4String(const UT_UCS4Char * sz, size_t n = 0 /* 0 == zero-terminate */);
    UT_UCS4String(const UT_UCS4String& rhs);

    /* construct from a string in UTF-8 format
     */
    UT_UCS4String(const char * utf8_str, size_t bytelength = 0 /* 0 == zero-terminate */);
    UT_UCS4String(const std::string & str /* zero-terminated utf-8 encoded */);

    /* construct from a string in UTF-8 format
     * if (strip_whitespace == true) replace all white space sequences with a single UCS_SPACE
     * if (strip_whitespace != true) replace CR-LF & CR by LF
     * non-breaking spaces (&nbsp; UCS_NBSP 0x0a) are not white space; see UT_UCS4_isspace()
     */
    UT_UCS4String(const char * utf8_str, size_t bytelength /* 0 == zero-terminate */, bool strip_whitespace);

    ~UT_UCS4String();

    size_t  size() const;
    size_t length () const { return size () ; }

    void            reserve(size_t n);
    bool        empty() const;
    void        clear() const;

    UT_UCS4String   substr(size_t iStart, size_t nChars) const;

    UT_UCS4String&  operator=(const UT_UCS4String&  rhs);
    UT_UCS4String&  operator=(const UT_UCS4Char *   rhs);
    UT_UCS4String&  operator+=(const UT_UCS4String& rhs);
    UT_UCS4String&  operator+=(const UT_UCS4Char *  rhs);
    UT_UCS4String&  operator+=(UT_UCS4Char rhs);
    UT_UCS4String&  operator+=(char rhs);
    UT_UCS4String&  operator+=(unsigned char rhs);

    UT_UCS4Char     operator[](size_t iPos) const;
    UT_UCS4Char&    operator[](size_t iPos);

    void        swap(UT_UCS4String& rhs);

    // The returned pointer is valid until the next non-const
    // operation. You will _always_ get a legal pointer back,
    // even if to an empty (0) string.
    const UT_UCS4Char* ucs4_str() const;

    const char * utf8_str ();

private:
    void _loadUtf8(const char * utf8_str, size_t bytelength); // implementation detail for the UTF-8 constructor
    class UT_StringImpl<UT_UCS4Char>* pimpl;
};

// helpers
bool operator==(const UT_UCS4String& s1, const UT_UCS4String& s2);
bool operator==(const UT_UCS4String& s1, const UT_UCS4Char *  s2);
bool operator==(const UT_UCS4Char *  s1, const UT_UCS4String& s2);
bool operator!=(const UT_UCS4String& s1, const UT_UCS4String& s2);
bool operator!=(const UT_UCS4String& s1, const UT_UCS4Char *  s2);
bool operator!=(const UT_UCS4Char *  s1, const UT_UCS4String& s2);

// strcmp ordering
bool operator<(const UT_UCS4String& s1, const UT_UCS4String& s2);

UT_UCS4String operator+(const UT_UCS4String& s1, const UT_UCS4String& s2);



#endif  // UT_STRING_CLASS_H

---