print_utils.cc File Reference

#include "sql/join_optimizer/print_utils.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <algorithm>
#include <sstream>
#include <string>
#include <vector>
#include "sql/item_cmpfunc.h"
#include "sql/join_optimizer/relational_expression.h"
#include "sql/mem_root_array.h"

Namespaces
namespace	anonymous_namespace{print_utils.cc}

Functions
std::string	StringPrintf (const char *fmt,...)
	Like sprintf, but returns an std::string. More...
std::string	GenerateExpressionLabel (const RelationalExpression *expr)
std::string	anonymous_namespace{print_utils.cc}::DecimalFormat (double d, int log_precision)
	Format 'd' as a decimal number with enough decimals to get a rounding error less than d*10^log_precision, without any trailing fractional zeros. More...
std::string	anonymous_namespace{print_utils.cc}::EngineeringFormat (double d)
	Format 'd' in engineering format, i.e. More...
constexpr uint64_t	anonymous_namespace{print_utils.cc}::Power (uint64_t base, int power)
	Integer exponentiation. More...
std::string	FormatNumberReadably (double d)
std::string	FormatNumberReadably (uint64_t l)

Variables
constexpr int	anonymous_namespace{print_utils.cc}::kPlainNumberLength = 6
	The maximal number of digits we use in decimal numbers (e.g. More...
constexpr int	anonymous_namespace{print_utils.cc}::kMantissaLength = 3
	The maximal number of digits in engineering format mantissas, e.g. More...
constexpr double	anonymous_namespace{print_utils.cc}::kMinNonZeroNumber = 1.0e-12
	The smallest number (absolute value) that we do not format as "0". More...
constexpr int	anonymous_namespace{print_utils.cc}::kLogPrecision = -2
	For decimal numbers, include enough decimals to ensure that any rounding error is less than <number>*10^kLogPrecision (i.e. More...
const double	anonymous_namespace{print_utils.cc}::kMinPlainFormatNumber
	The smallest number (absolute value) that we format as decimal (rather than engineering format). More...

Function Documentation

FormatNumberReadably() [1/2]

std::string FormatNumberReadably

(

double

d

)

FormatNumberReadably() [2/2]

std::string FormatNumberReadably

(

uint64_t

l

)

GenerateExpressionLabel()

std::string GenerateExpressionLabel

(

const RelationalExpression *

expr

)

StringPrintf()

std::string StringPrintf	(	const char *	fmt,
			...
	)

Like sprintf, but returns an std::string.

This is not the most efficient of formatting functions, but it is only intended for debugging/tracing use.