size_t RenderV2ToFile(const ID3_TagImpl& tag, fstream& file)
{
ID3D_NOTICE( "RenderV2ToFile: starting" );
if (!file)
{
ID3D_WARNING( "RenderV2ToFile: error in file" );
return 0;
}
String tagString;
io::StringWriter writer(tagString);
id3::v2::render(writer, tag);
ID3D_NOTICE( "RenderV2ToFile: rendered v2" );
const char* tagData = tagString.data();
size_t tagSize = tagString.size();
// if the new tag fits perfectly within the old and the old one
// actually existed (ie this isn't the first tag this file has had)
if ((!tag.GetPrependedBytes() && !ID3_GetDataSize(tag)) ||
(tagSize == tag.GetPrependedBytes()))
{
file.seekp(0, ios::beg);
file.write(tagData, tagSize);
}
else
{
String filename = tag.GetFileName();
String sTmpSuffix = ".XXXXXX";
if (filename.size() + sTmpSuffix.size() > ID3_PATH_LENGTH)
{
// log this
return 0;
//ID3_THROW_DESC(ID3E_NoFile, "filename too long");
}
char sTempFile[ID3_PATH_LENGTH];
strcpy(sTempFile, filename.c_str());
strcat(sTempFile, sTmpSuffix.c_str());
#if ((defined(__GNUC__) && __GNUC__ >= 3 ) || !defined(HAVE_MKSTEMP))
// This section is for Windows folk && gcc 3.x folk
fstream tmpOut;
createFile(sTempFile, tmpOut);
tmpOut.write(tagData, tagSize);
file.seekg(tag.GetPrependedBytes(), ios::beg);
char *tmpBuffer[BUFSIZ];
while (!file.eof())
{
file.read((char *)tmpBuffer, BUFSIZ);
size_t nBytes = file.gcount();
tmpOut.write((char *)tmpBuffer, nBytes);
}
#else //((defined(__GNUC__) && __GNUC__ >= 3 ) || !defined(HAVE_MKSTEMP))
// else we gotta make a temp file, copy the tag into it, copy the
// rest of the old file after the tag, delete the old file, rename
// this new file to the old file's name and update the handle
int fd = mkstemp(sTempFile);
if (fd < 0)
{
remove(sTempFile);
//ID3_THROW_DESC(ID3E_NoFile, "couldn't open temp file");
}
ofstream tmpOut(fd);
if (!tmpOut)
{
tmpOut.close();
remove(sTempFile);
return 0;
// log this
//ID3_THROW(ID3E_ReadOnly);
}
tmpOut.write(tagData, tagSize);
file.seekg(tag.GetPrependedBytes(), ios::beg);
uchar tmpBuffer[BUFSIZ];
while (file)
{
file.read(tmpBuffer, BUFSIZ);
size_t nBytes = file.gcount();
tmpOut.write(tmpBuffer, nBytes);
}
close(fd); //closes the file
#endif ////((defined(__GNUC__) && __GNUC__ >= 3 ) || !defined(HAVE_MKSTEMP))
tmpOut.close();
file.close();
// the following sets the permissions of the new file
// to be the same as the original
#if defined(HAVE_SYS_STAT_H)
struct stat fileStat;
if(stat(filename.c_str(), &fileStat) == 0)
{
#endif //defined(HAVE_SYS_STAT_H)
remove(filename.c_str());
rename(sTempFile, filename.c_str());
#if defined(HAVE_SYS_STAT_H)
chmod(filename.c_str(), fileStat.st_mode);
}
#endif //defined(HAVE_SYS_STAT_H)
// file = tmpOut;
file.clear();//to clear the eof mark
openWritableFile(filename, file);
}
return tagSize;
}
size_t RenderV2ToFile(const ID3_TagImpl& tag, fstream& file)
{
ID3D_NOTICE( "RenderV2ToFile: starting" );
if (!file)
{
ID3D_WARNING( "RenderV2ToFile: error in file" );
return 0;
}
String tagString;
io::StringWriter writer(tagString);
id3::v2::render(writer, tag);
ID3D_NOTICE( "RenderV2ToFile: rendered v2" );
const char* tagData = tagString.data();
size_t tagSize = tagString.size();
// if the new tag fits perfectly within the old and the old one
// actually existed (ie this isn't the first tag this file has had)
if ((!tag.GetPrependedBytes() && !ID3_GetDataSize(tag)) ||
(tagSize == tag.GetPrependedBytes()))
{
file.seekp(0, ios::beg);
file.write(tagData, tagSize);
}
else
{
String filename = tag.GetFileName();
#if !defined HAVE_MKSTEMP
// This section is for Windows folk
FILE *tempOut = tmpfile();
if (NULL == tempOut)
{
// log this
return 0;
//ID3_THROW(ID3E_ReadOnly);
}
fwrite(tagData, 1, tagSize, tempOut);
file.seekg(tag.GetPrependedBytes(), ios::beg);
uchar tmpBuffer[BUFSIZ];
while (!file)
{
file.read((char *)tmpBuffer, BUFSIZ);
size_t nBytes = file.gcount();
fwrite(tmpBuffer, 1, nBytes, tempOut);
}
rewind(tempOut);
openWritableFile(filename, file);
while (!feof(tempOut))
{
size_t nBytes = fread(tmpBuffer, 1, BUFSIZ, tempOut);
file.write((char *)tmpBuffer, nBytes);
}
fclose(tempOut);
#else
// else we gotta make a temp file, copy the tag into it, copy the
// rest of the old file after the tag, delete the old file, rename
// this new file to the old file's name and update the handle
String sTmpSuffix = ".XXXXXX";
if (filename.size() + sTmpSuffix.size() > ID3_PATH_LENGTH)
{
// log this
return 0;
//ID3_THROW_DESC(ID3E_NoFile, "filename too long");
}
char sTempFile[ID3_PATH_LENGTH];
strcpy(sTempFile, filename.c_str());
strcat(sTempFile, sTmpSuffix.c_str());
int fd = mkstemp(sTempFile);
if (fd < 0)
{
remove(sTempFile);
//ID3_THROW_DESC(ID3E_NoFile, "couldn't open temp file");
}
ofstream tmpOut(fd);
if (!tmpOut)
{
tmpOut.close();
remove(sTempFile);
return 0;
// log this
//ID3_THROW(ID3E_ReadOnly);
}
tmpOut.write(tagData, tagSize);
file.seekg(tag.GetPrependedBytes(), ios::beg);
uchar tmpBuffer[BUFSIZ];
while (file)
{
file.read(tmpBuffer, BUFSIZ);
size_t nBytes = file.gcount();
tmpOut.write(tmpBuffer, nBytes);
}
tmpOut.close();
file.close();
remove(filename.c_str());
rename(sTempFile, filename.c_str());
openWritableFile(filename, file);
#endif
}
return tagSize;
}
size_t ID3_GetDataSize(const ID3_TagImpl& tag)
{
return tag.GetFileSize() - tag.GetPrependedBytes() - tag.GetAppendedBytes();
}