Definition in file misc.h.
#include <iostream>
#include <cmath>
#include <string>
#include <fstream>
#include <sstream>
#include <vector>
#include <o2scl/err_hnd.h>
#include <o2scl/lib_settings.h>
#include <gsl/gsl_ieee_utils.h>
Go to the source code of this file.
Data Structures | |
struct | string_comp |
Naive string comparison. More... | |
class | gen_test_number |
Generate number sequence for testing. More... | |
Functions | |
double | fermi_function (double E, double mu, double T, double limit=40.0) |
Calculate a Fermi-Dirac distribution function safely. | |
void | screenify (const std::string *in_cols, int nin, std::string *&outc, int &nout, int max_size=80) |
Reformat the columns for output of width size . | |
template<class string_arr_t> | |
int | screenify2 (size_t nin, const string_arr_t &in_cols, std::vector< std::string > &out_cols, size_t max_size=80) |
int | count_words (std::string str) |
Count the number of words in the string str . | |
std::string | binary_to_hex (std::string s) |
Take a string of binary quads and compress them to hexadecimal digits. |
std::string binary_to_hex | ( | std::string | s | ) |
Take a string of binary quads and compress them to hexadecimal digits.
This function proceeds from left to right, ignoring parts of the string that do not consist of squences of four '1's or '0's.
int count_words | ( | std::string | str | ) |
Count the number of words in the string str
.
Words are defined as groups of characters separated by whitespace, where whitespace is any combination of adjacent spaces, tabs, carriage returns, etc. On most systems, whitespace is usually defined as any character corresponding to the integers 9 (horizontal tab), 10 (line feed), 11 (vertical tab), 12 (form feed), 13 (carriage return), and 32 (space bar). The test program misc_ts
enumerates the characters between 0 and 255 (inclusive) that count as whitespace for this purpose.
Note that this function is used in text_in_file::string_in to perform string input.
double fermi_function | ( | double | E, | |
double | mu, | |||
double | T, | |||
double | limit = 40.0 | |||
) |
Calculate a Fermi-Dirac distribution function safely.
This calculates a Fermi-Dirac distribution function guaranteeing that numbers larger than and smaller than
will be avoided. The default value of
limit
ensures accuracy to within 1 part in compared to the maximum of the distribution (which is unity).
Note that this function may return Inf or NAN if limit
is too large, depending on the machine precision.
void screenify | ( | const std::string * | in_cols, | |
int | nin, | |||
std::string *& | outc, | |||
int & | nout, | |||
int | max_size = 80 | |||
) |
Reformat the columns for output of width size
.
Given a string array in_cols
of size nin
, screenify() reformats the array into columns creating a new string array outc
with size nout
.
For example, for an array of 10 strings
test1 test_of_string2 test_of_string3 test_of_string4 test5 test_of_string6 test_of_string7 test_of_string8 test_of_string9 test_of_string10
test1 test_of_string4 test_of_string7 test_of_string10 test_of_string2 test5 test_of_string8 test_of_string3 test_of_string6 test_of_string9
The string array given in outc must be deleted with delete[] after usage.
If the value of max_size
is less than the length of the longest input string (plus one for a space character), then the output strings may have a larger length than max_size
.
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