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5.3 Output functions
Including <cln/io.h>
defines a number of simple output functions
that write to std::ostream&
:
void fprintchar (std::ostream& stream, char c)
Prints the character
x
literally on thestream
.void fprint (std::ostream& stream, const char * string)
Prints the
string
literally on thestream
.void fprintdecimal (std::ostream& stream, int x)
void fprintdecimal (std::ostream& stream, const cl_I& x)
Prints the integer
x
in decimal on thestream
.void fprintbinary (std::ostream& stream, const cl_I& x)
Prints the integer
x
in binary (base 2, without prefix) on thestream
.void fprintoctal (std::ostream& stream, const cl_I& x)
Prints the integer
x
in octal (base 8, without prefix) on thestream
.void fprinthexadecimal (std::ostream& stream, const cl_I& x)
Prints the integer
x
in hexadecimal (base 16, without prefix) on thestream
.
Each of the classes cl_N
, cl_R
, cl_RA
, cl_I
,
cl_F
, cl_SF
, cl_FF
, cl_DF
, cl_LF
defines, in <cln/type_io.h>
, the following output functions:
void fprint (std::ostream& stream, const type& x)
std::ostream& operator<< (std::ostream& stream, const type& x)
Prints the number
x
on thestream
. The output may depend on the global printer settings in the variabledefault_print_flags
. Theostream
flags and settings (flags, width and locale) are ignored.
The most flexible output function, defined in <cln/type_io.h>
,
are the following:
void print_complex (std::ostream& stream, const cl_print_flags& flags, const cl_N& z); void print_real (std::ostream& stream, const cl_print_flags& flags, const cl_R& z); void print_float (std::ostream& stream, const cl_print_flags& flags, const cl_F& z); void print_rational (std::ostream& stream, const cl_print_flags& flags, const cl_RA& z); void print_integer (std::ostream& stream, const cl_print_flags& flags, const cl_I& z);
Prints the number x
on the stream
. The flags
are
parameters which affect the output.
The structure type cl_print_flags
contains the following fields:
unsigned int rational_base
The base in which rational numbers are printed. Default is
10
.bool rational_readably
If this flag is true, rational numbers are printed with radix specifiers in Common Lisp syntax (
#nR
or#b
or#o
or#x
prefixes, trailing dot). Default is false.bool float_readably
If this flag is true, type specific exponent markers have precedence over ’E’. Default is false.
float_format_t default_float_format
Floating point numbers of this format will be printed using the ’E’ exponent marker. Default is
float_format_ffloat
.bool complex_readably
If this flag is true, complex numbers will be printed using the Common Lisp syntax
#C(realpart imagpart)
. Default is false.cl_string univpoly_varname
Univariate polynomials with no explicit indeterminate name will be printed using this variable name. Default is
"x"
.
The global variable default_print_flags
contains the default values,
used by the function fprint
.
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