ref: b00a2415ffe2895620baf6bae968d547cc723f21
dir: /common/id3lib/src/field_string_ascii.cpp/
// $Id: field_string_ascii.cpp,v 1.1 2002/01/21 08:16:21 menno Exp $ // id3lib: a C++ library for creating and manipulating id3v1/v2 tags // Copyright 1999, 2000 Scott Thomas Haug // This library is free software; you can redistribute it and/or modify it // under the terms of the GNU Library General Public License as published by // the Free Software Foundation; either version 2 of the License, or (at your // option) any later version. // // This library 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 Library General Public // License for more details. // // You should have received a copy of the GNU Library General Public License // along with this library; if not, write to the Free Software Foundation, // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // The id3lib authors encourage improvements and optimisations to be sent to // the id3lib coordinator. Please see the README file for details on where to // send such submissions. See the AUTHORS file for a list of people who have // contributed to id3lib. See the ChangeLog file for a list of changes to // id3lib. These files are distributed with id3lib at // http://download.sourceforge.net/id3lib/ #include <string.h> #include <stdlib.h> #include "field.h" #include "utils.h" #if defined HAVE_CONFIG_H #include <config.h> #endif ID3_Field& ID3_Field::operator= (const char *string) { Set(string); return *this; } // the ::Set() function for ASCII void ID3_Field::Set(const char *sString) { if (sString != NULL) { Clear(); size_t nStrLen = (0 == __length) ? strlen(sString) : __length; unicode_t *temp = new unicode_t[nStrLen + 1]; if (NULL == temp) { ID3_THROW(ID3E_NoMemory); } mbstoucs(temp, sString, nStrLen + 1); Set(temp); delete [] temp; this->SetEncoding(ID3TE_ASCII); __type = ID3FTY_TEXTSTRING; } return ; } // the ::Get() function for ASCII size_t ID3_Field::Get(char* buffer, size_t maxLength, index_t itemNum) const { unicode_t* unicode_buffer = new unicode_t[maxLength]; if (NULL == unicode_buffer) { ID3_THROW(ID3E_NoMemory); } size_t len = Get(unicode_buffer, maxLength, itemNum); char* ascii_buffer = new char[len + 1]; if (NULL == ascii_buffer) { ID3_THROW(ID3E_NoMemory); } ucstombs(ascii_buffer, unicode_buffer, len + 1); size_t ascii_len = strlen(ascii_buffer); size_t length = MIN(ascii_len, maxLength); strncpy(buffer, ascii_buffer, length); buffer[length] = '\0'; delete [] ascii_buffer; delete [] unicode_buffer; return length; } void ID3_Field::Add(const char *sString) { if (sString) { unicode_t *unicode_buffer; unicode_buffer = new unicode_t[strlen(sString) + 1]; if (NULL == unicode_buffer) { ID3_THROW(ID3E_NoMemory); } mbstoucs(unicode_buffer, sString, strlen(sString) + 1); Add(unicode_buffer); delete [] unicode_buffer; this->SetEncoding(ID3TE_ASCII); __type = ID3FTY_TEXTSTRING; } } size_t ID3_Field::ParseASCIIString(const uchar *buffer, size_t nSize) { size_t bytesUsed = 0; char *temp = NULL; if (__length > 0) { // The string is of fixed length bytesUsed = __length; } else if (!(__flags & ID3FF_CSTR) || (__flags & ID3FF_LIST)) { // If the string isn't null-terminated or if it is null divided, we're // assured this is the last field of of the frame, and we can claim the // remaining bytes for ourselves bytesUsed = nSize; } else { while (bytesUsed < nSize && buffer[bytesUsed] != '\0') { bytesUsed++; } } if (0 == bytesUsed) { Set(""); } // This check needs to come before the check for ID3FF_CSTR else if (__flags & ID3FF_LIST) { const char *sBuffer = (const char *) buffer; for (size_t i = 0; i < bytesUsed; i += strlen(&sBuffer[i]) + 1) { Add(&sBuffer[i]); } } // This check needs to come after the check for ID3FF_LIST else if (__flags & ID3FF_CSTR) { Set((const char *)buffer); } else { // Sanity check our indices and sizes before we start copying memory if (bytesUsed > nSize) { ID3_THROW_DESC(ID3E_BadData, "field information invalid"); } temp = new char[bytesUsed + 1]; if (NULL == temp) { ID3_THROW(ID3E_NoMemory); } memcpy(temp, buffer, bytesUsed); temp[bytesUsed] = '\0'; Set(temp); delete [] temp; } if (__flags & ID3FF_CSTR && !(__flags & ID3FF_LIST)) { bytesUsed++; } __changed = false; return bytesUsed; } size_t ID3_Field::RenderASCIIString(uchar *buffer) const { size_t nChars = BinSize(); if ((NULL != __data) && (nChars > 0)) { ucstombs((char *) buffer, (unicode_t *) __data, nChars); // now we convert the internal dividers to what they are supposed to be for (index_t i = 0; i < nChars; i++) { if ('\1' == buffer[i]) { char sub = '/'; if (__flags & ID3FF_LIST) { sub = '\0'; } buffer[i] = sub; } } } if ((1 == nChars) && (__flags & ID3FF_CSTR)) { buffer[0] = '\0'; } __changed = false; return nChars; }