XrdPfc::snprintf_wrapper Struct Reference

#include <XrdPfc.hh>

Collaboration diagram for XrdPfc::snprintf_wrapper:

Public Member Functions
	snprintf_wrapper (const std::string &exc_prefix, int size=1024)
const char *	c_str () const
void	operator() (const char *fmt,...)

Public Attributes
std::string	f_exc_prefix
size_t	f_pos
std::vector< char >	f_string

Static Public Attributes
static const size_t	s_MAX_SIZE = 10 * 1024 * 1024

Detailed Description

Definition at line 162 of file XrdPfc.hh.

Constructor & Destructor Documentation

snprintf_wrapper()

XrdPfc::snprintf_wrapper::snprintf_wrapper	(	const std::string &	exc_prefix,
		int	size = 1024 )

Definition at line 75 of file XrdPfcConfiguration.cc.

                                                                        :
   f_exc_prefix(exc_prefix)
{
   if (size < 64) size = 64;
   f_string.resize(size);
   f_string[0] = 0;
   f_pos = 0;
}

References f_exc_prefix, f_pos, and f_string.

Member Function Documentation

c_str()

const char * XrdPfc::snprintf_wrapper::c_str ( ) const

inline

Definition at line 173 of file XrdPfc.hh.

{ return f_string.data(); }

References f_string.

Referenced by XrdPfc::Cache::Config().

Here is the caller graph for this function:

operator()()

void XrdPfc::snprintf_wrapper::operator()	(	const char *	fmt,
			... )

Definition at line 84 of file XrdPfcConfiguration.cc.

{
   va_list ap;
   bool done = false;
   while ( ! done) {
      va_start(ap, fmt);
      size_t space_left = f_string.size() - f_pos;
      int rc = vsnprintf(f_string.data() + f_pos, space_left, fmt, ap);
      va_end(ap);
      if (rc < 0) {
         throw std::runtime_error(f_exc_prefix + " - vsnprintf failure: " + std::to_string(rc));
      }
      size_t would_write = (size_t) rc;
      if (would_write >= space_left) {
         size_t new_size = f_string.size() * 2;
         if (new_size > s_MAX_SIZE) {
            throw std::runtime_error(f_exc_prefix + " - exceeding " + std::to_string(s_MAX_SIZE) + " bytes limit");
         }
         f_string.resize(f_string.size() * 2);
      } else {
         f_pos += would_write;
         done = true;
      }
   }
}

References f_exc_prefix, f_pos, f_string, and s_MAX_SIZE.

Member Data Documentation

f_exc_prefix

std::string XrdPfc::snprintf_wrapper::f_exc_prefix

Definition at line 165 of file XrdPfc.hh.

Referenced by snprintf_wrapper(), and operator()().

f_pos

size_t XrdPfc::snprintf_wrapper::f_pos

Definition at line 164 of file XrdPfc.hh.

Referenced by snprintf_wrapper(), and operator()().

f_string

std::vector<char> XrdPfc::snprintf_wrapper::f_string

Definition at line 163 of file XrdPfc.hh.

Referenced by snprintf_wrapper(), c_str(), and operator()().

s_MAX_SIZE

const size_t XrdPfc::snprintf_wrapper::s_MAX_SIZE = 10 * 1024 * 1024

static

Definition at line 167 of file XrdPfc.hh.

Referenced by operator()().

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The documentation for this struct was generated from the following files:

• XrdPfc.hh
• XrdPfcConfiguration.cc