/*

 * Copyright (C) 2003 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#include "config.h"

#include "DeprecatedCString.h"

#include <wtf/Assertions.h>

#include <ctype.h>

namespace WebCore {

DeprecatedCString::DeprecatedCString()

{

}

DeprecatedCString::DeprecatedCString(int size) : DeprecatedByteArray(size)

{

    if( size>0 && data() )

    {

        data()[0] = 0;          // first null

        data()[size-1] = 0;     // last byte

    }

    // else null

}

DeprecatedCString::DeprecatedCString(const char *str)

{

    size_t len;

    if( str && (len=strlen(str)+1) && resize(len) )     // include null

        strcpy( data(), str );

    // else null

}

DeprecatedCString::DeprecatedCString(const char *str, unsigned max)

{

    if( str && max )

    {

        // perform a truncated strlen on str

        const char* p = str;

        unsigned len = 1;                   // for the null

        while( *p++ && len<max )

            len ++;

        if( resize(len) )

        {

            char *dest = data();

            strncpy( dest, str, len );

            dest[len-1] = 0;            // re-terminate

        }

    }

    // else null

}

bool DeprecatedCString::isEmpty() const

{ return length()==0; }

unsigned DeprecatedCString::length() const

{

    const char *d = data();

    return d ? strlen(d) : 0;

}

bool DeprecatedCString::resize(unsigned len)

{

    bool success = DeprecatedByteArray::resize(len);

    if( success && len>0 )

        data()[len-1] = 0;      // always terminate last byte

    return success;

}

bool DeprecatedCString::truncate(unsigned pos)

{

    return resize(pos+1);

}

DeprecatedCString DeprecatedCString::lower() const

{

    // convert

    DeprecatedCString tmp = *this;       // copy

    char* str = tmp.data();

    if( str )

    {

        while( *str != 0 )

        {

            *str = tolower(*str);

            str++;

        }

    }

    return tmp;

}

DeprecatedCString DeprecatedCString::upper() const

{

    DeprecatedCString tmp = *this;       // copy

    char* str = tmp.data();

    if( str )

    {

        while( *str != 0 )

        {

            *str = toupper(*str);

            str++;

        }

    }

    return tmp;

}

inline DeprecatedCString DeprecatedCString::left(unsigned len) const

{ return mid(0, len); }

inline DeprecatedCString DeprecatedCString::right(unsigned len) const

{ return mid(length() - len, len); }

DeprecatedCString DeprecatedCString::mid(unsigned index, unsigned len) const

{

    unsigned size = length();

    if( data() && index<size )      // return null if index out-of-range

    {

        // clip length

        if( len > size - index )

            len = size - index;

        // copy and return

        return DeprecatedCString( &(data()[index]), len+1);  // include nul

    }

    // degenerate case

    return DeprecatedCString();

}

int DeprecatedCString::find(const char *sub, int index, bool cs) const

{

    const char* str = data();

    if( str && str[0] && sub && index>=0 )  // don't search empty strings

    {

        // advance until we get to index

        int pos = 0;

        while( pos < index )

            if( str[pos++] == 0 )

                return -1;                  // index is beyond end of str

        // now search from index onward

        while( str[index] != 0 )

        {

            char a, b;

            // compare until we reach the end or a mismatch

            pos = 0;

            if( cs )

                while( (a=sub[pos]) && (b=str[index]) && a==b )

                    pos++, index++;

            else

                while( (a=sub[pos]) && (b=str[index]) && tolower(a)==tolower(b) )

                    pos++, index++;

            // reached the end of our compare string without a mismatch?

            if( sub[pos] == 0 )

                return index - pos;

            index ++;

        }

    }

    return -1;

}

int DeprecatedCString::contains(char c, bool cs) const

{

    unsigned found = 0;

    unsigned len = length();

    if (len) {

        const char *str = data();

        if (cs) {

            for (unsigned i = 0; i != len; ++i) {

                found += str[i] == c;

            }

        } else {

            c = tolower(c);

            for (unsigned i = 0; i != len; ++i) {

                char chr = str[i];

                chr = tolower(chr);

                found += chr == c;

            }

        }

    }

    return found;

}

DeprecatedCString &DeprecatedCString::operator=(const char *assignFrom)

{

    duplicate(assignFrom, (assignFrom ? strlen(assignFrom) : 0) + 1);

    return *this;

}

DeprecatedCString& DeprecatedCString::append(const char *s)

{

    if (s) {

        unsigned len2 = strlen(s);

        if (len2) {

            detach();

            unsigned len1 = length();

            if (DeprecatedByteArray::resize(len1 + len2 + 1))

                memcpy(data() + len1, s, len2 + 1);

        }

    }

    return *this;

}

DeprecatedCString &DeprecatedCString::append(char c)

{

    detach();

    unsigned len = length();

    if (DeprecatedByteArray::resize(len + 2)) {

        *(data() + len) = c;

        *(data() + len + 1) = '\0';

    }

    return *this;

}

DeprecatedCString &DeprecatedCString::replace(char c1, char c2)

{

    unsigned len = length();

    if (len) {

        // Search for the first instance of c1 before detaching,

        // just in case there is nothing to replace. In that case

        // we don't want to detach this from other shared instances

        // since we have no need to modify it.

        unsigned i;

        {

            const char *s = data();

            for (i = 0; i != len; ++i) {

                if (s[i] == c1) {

                    break;

                }

            }

        }

        if (i != len) {

            detach();

            char *s = data();

            // Start at the first instance of c1; no need to rescan earlier chars.

            for (; i != len; ++i) {

                if (s[i] == c1) {

                    s[i] = c2;

                }

            }

        }

    }

    return *this;

}

bool operator==(const DeprecatedCString &s1, const char *s2)

{

    if (s1.size() == 0 && !s2)

        return true;

    if (s1.size() == 0 && s2)

        return false;

    return strcmp(s1, s2) == 0;

}

}