# Folders¶

A set of functions to manipulate paths and create folders.

std::string mirheo::createStrZeroPadded(long long i, int zeroPadding = 5)

Create a string representing an integer with 0 padding.

If

zeroPadding is too small, this method will die. Example: createStrZeroPadded(42, 5) gives “00042”
Return
the string representation of i with padded zeros
Parameters
• i: The integer to print (must non negative)
• zeroPadding: The total number of characters

std::vector<std::string> mirheo::splitByDelim(std::string str, char delim = ',')

Split a string according to a delimiter character.

e.g.

splitByDelim(“string_to_split”, ‘_’) -> {“string”, “to”, “split”}
Return
The list of substrings (without the delimiter)
Parameters
• str: The input sequence of characters
• delim: The delimiter

std::string mirheo::makePath(std::string path)

append ‘/’ at the end of path if it doesn t have it already

Return
The path with a trailing separator
Parameters
• path: The path to work with

std::string mirheo::getParentPath(std::string path)

Get the parent folder of the given filename.

If the input is a path (it ends with a ‘/’), the output is the same as the input. If the input is just a filename with no ‘/’, this function returns an empty string.

Return
The parent folder.
Parameters
• path: The filename containing a path

std::string mirheo::getBaseName(std::string path)

remove the path from the given filename.

Return
the filename only without any prepended folder
Parameters
• path: The filename with full relative or absolute path

std::string mirheo::joinPaths(const std::string &A, const std::string &B)

Concatenate two paths A and B.

Return
A/B Adds a ‘/’ between A and B if A is non-empty and if it doesn’t already end with ‘/’.
Parameters
• A: first part of the full path
• B: last part of the full path

bool mirheo::createFoldersCollective(const MPI_Comm &comm, std::string path)

Create a folder.

The operation is collective. This means that all ranks in the

comm must call it. The returned value is accessible by all ranks.
Return
true if the operation was successful, false otherwise
Parameters
• comm: The communicator used to decide which rank creates the folder
• path: the folder to create