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// $Id$
#include "XML_Saver.h"
#include "ace/High_Res_Timer.h"
#include "ace/OS_NS_stdio.h"
#include "ace/OS_NS_unistd.h"
namespace TAO_Notify
{
XML_Saver::XML_Saver(bool timestamp)
: output_ (0)
, close_out_ (false)
, backup_count_ (1)
, timestamp_ (timestamp)
{
}
XML_Saver::~XML_Saver()
{
if (this->output_ != 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("(%P|%t) XML_Saver warning close not called or failed\n")
));
}
}
void
XML_Saver::backup_file_name (char * file_path, int nfile)
{
ACE_OS::snprintf(file_path, MAXPATHLEN, "%s.%3.3d",
this->base_name_.c_str (),
nfile);
}
void
XML_Saver::close (ACE_ENV_SINGLE_ARG_DECL)
{
if (this->close_out_ && this->output_ != 0)
{
this->end_object(0, "notification_service" ACE_ENV_ARG_PARAMETER);
ACE_CHECK;
ACE_OS::fclose(this->output_);
this->output_ = 0;
// delete the oldest backup file (if it exists)
size_t nfile = this->backup_count_ - 1;
char old_path [MAXPATHLEN + 1];
backup_file_name (old_path, nfile);
ACE_OS::unlink (old_path);
while (nfile != 0)
{
char new_path [MAXPATHLEN + 1];
nfile -= 1;
backup_file_name (new_path, nfile);
// this may fail, we don't care
ACE_OS::rename (new_path, old_path);
ACE_OS::strcpy (old_path, new_path);
}
// old_path now contains the name of the backup file
ACE_CString xml_name = this->base_name_;
xml_name += ".xml";
ACE_OS::rename (xml_name.c_str (), old_path);
ACE_CString new_name = this->base_name_;
new_name += ".new";
ACE_OS::rename (new_name.c_str (), xml_name.c_str ());
}
this->output_ = 0;
}
bool
XML_Saver::open(const ACE_CString & base_name, size_t backup_count)
{
this->base_name_ = base_name;
this->backup_count_ = backup_count;
if (base_name == "cout")
{
this->output_ = stdout;
this->close_out_ = false;
}
else if (base_name == "cerr")
{
this->output_ = stderr;
this->close_out_ = false;
}
else
{
ACE_CString file_name = base_name;
file_name += ".new";
this->output_ = ACE_OS::fopen (file_name.c_str(), ACE_TEXT("wb"));
if (this->output_) {
this->close_out_ = true;
} else {
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("(%P|%t) XML_Saver unable to open %s\n"),
base_name.c_str()));
}
}
if (this->output_ != 0)
{
FILE *out = this->output_;
ACE_OS::fprintf (out, "<?xml version=\"1.0\"?>\n");
ACE_DECLARE_NEW_CORBA_ENV;
ACE_TRY
{
bool changed = true;
NVPList attrs;
ACE_Time_Value now = ACE_High_Res_Timer::gettimeofday();
ACE_UINT64 nowus = now.usec();
static const ACE_UINT64 USECSPERSEC = 1000 * 1000;
ACE_UINT64 tmpus = now.sec();
nowus += tmpus * USECSPERSEC;
char nowusstr[128];
#ifdef ACE_LACKS_LONGLONG_T
nowus.as_string(nowusstr);
#else
ACE_OS::sprintf(nowusstr, ACE_UINT64_FORMAT_SPECIFIER, nowus);
#endif /* ACE_LACKS_LONGLONG_T */
attrs.push_back(NVP("version", "1.0"));
if (this->timestamp_)
{
attrs.push_back(NVP("timestamp", nowusstr));
}
this->begin_object(0, "notification_service", attrs, changed ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
}
ACE_CATCHANY
{
ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
ACE_TEXT ("(%P|%t) XML_Saver Unknown exception\n"));
delete this->output_;
this->output_ = 0;
}
ACE_ENDTRY;
}
return this->output_ != 0;
}
bool XML_Saver::begin_object(CORBA::Long id,
const ACE_CString& type,
const NVPList& attrs,
bool /* changed */
ACE_ENV_ARG_DECL_NOT_USED)
{
ACE_ASSERT(this->output_ != 0);
FILE *out = this->output_;
ACE_OS::fprintf (out, "%s%s%s", indent_.c_str(), "<", type.c_str());
if (id != 0)
{
// not all ostreams know what to do with a CORBA::Long
long lid = id;
ACE_OS::fprintf (out, "%s%s%ld%s", TOPOLOGY_ID_NAME, "=\"", lid, "\"");
}
char * buffer = 0;
size_t buffer_size = 0;
for (size_t idx = 0; idx < attrs.size(); idx++)
{
ACE_OS::fprintf (out, "%s%s%s%s%s", " ",
attrs[idx].name.c_str (),
"=\"",
escape_string(buffer, buffer_size, attrs[idx].value.c_str ()),
"\"");
}
delete [] buffer;
ACE_OS::fprintf (out, ">\n");
this->indent_ += " ";
return true;
}
void XML_Saver::end_object (CORBA::Long id,
const ACE_CString& type ACE_ENV_ARG_DECL_NOT_USED)
{
ACE_ASSERT(this->output_ != 0);
ACE_UNUSED_ARG (id);
FILE *out = this->output_;
if (this->indent_.length() >= 2)
{
this->indent_ = this->indent_.substr(2);
}
ACE_OS::fprintf (out, "%s%s%s%s", indent_.c_str(), "</",
type.c_str(), ">\n");
}
static const char escaped_amp[] = "&";
static const char escaped_less[] = "<";
static const char escaped_greater[] = ">";
static const char escaped_apos[] = "'";
static const char escaped_quote[] = """;
char *
XML_Saver::escape_string(char *& buffer, size_t & size, const ACE_CString & str)
{
size_t len = str.length ();
size_t needed = len * (sizeof(escaped_quote)-1) + 1;
if (needed > size)
{
delete [] buffer;
buffer = new char [needed];
size = needed;
}
size_t pos = 0; // position in output buffer
for (size_t stridx = 0; stridx < len; stridx++)
{
char curchar = str[stridx];
if (curchar == '&')
{
strcpy (&buffer[pos], escaped_amp);
pos += sizeof (escaped_amp) -1;
}
else if (curchar == '<')
{
strcpy (&buffer[pos], escaped_less);
pos += sizeof (escaped_less) -1;
}
else if (curchar == '>')
{
strcpy (&buffer[pos], escaped_greater);
pos += sizeof (escaped_greater) -1;
}
else if (curchar == '\'')
{
strcpy (&buffer[pos], escaped_apos);
pos += sizeof (escaped_apos) -1;
}
else if (curchar == '\"')
{
strcpy (&buffer[pos], escaped_quote);
pos += sizeof (escaped_quote) -1;
}
else
{
buffer[pos++] = curchar;
}
}
buffer[pos++] = '\0';
return buffer;
}
} /* namespace TAO_Notify */
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