#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_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.

173 { 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 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.