string_table Module Reference

generates a unique id number for a string (str2id) that can be used two compare two strings. I.e. if (str1==str2) => str2id(str1)==str2id(str2) if (str1/=str2) => str2id(str1)/=str2id(str2) and the other way around. Given an id, the string can be retrieved. More...

Functions/Subroutines
integer function, public	str2id (str)
	returns a unique id for a given string, and stores the string for later retrieval using the id.
character(len=default_string_length) function, public	id2str (id)
	returns the string associated with a given id
character(len=default_string_length) function, public	s2s (str)
	converts a string in a string of default_string_length
subroutine, public	string_table_allocate ()
	allocates the string table
subroutine, public	string_table_deallocate (iw)
	deallocates the string table

Variables
type(hash_element_type), dimension(:), allocatable, target, save	hash_table

Detailed Description

generates a unique id number for a string (str2id) that can be used two compare two strings. I.e. if (str1==str2) => str2id(str1)==str2id(str2) if (str1/=str2) => str2id(str1)/=str2id(str2) and the other way around. Given an id, the string can be retrieved.

Note

the purpose of this routine is to speed up string handling, string searching, ... as an operation on an int is much faster than an operation on a long string.

History

9.2006 [Joost VandeVondele]

Author

Joost VandeVondele

Function/Subroutine Documentation

str2id()

integer function, public string_table::str2id

(

character(len=*)

str

)

returns a unique id for a given string, and stores the string for later retrieval using the id.

Parameters

str	the string to be stored (default_string_length)

Returns

...

History

09.2006 created [Joost VandeVondele]

Note

pass literal strings using the s2s function, which converts strings of any length to default_string_length id=str2id(s2s("my short string"))

Definition at line 71 of file string_table.F.

Here is the caller graph for this function:

id2str()

character(len=default_string_length) function, public string_table::id2str

(

integer

id

)

returns the string associated with a given id

Parameters

id	the id to be converted into a string

Returns

...

History

09.2006 created [Joost VandeVondele]

Note

only id's of previously 'registered' strings (str2id) should be passed, otherwise things crash

Definition at line 114 of file string_table.F.

Here is the caller graph for this function:

s2s()

character(len=default_string_length) function, public string_table::s2s

(

character(len=*)

str

)

converts a string in a string of default_string_length

Parameters

str

...

Returns

...

History

09.2006 created [Joost VandeVondele]

Note

useful to pass a literal string to str2id i.e. id=str2id(s2s("X"))

Definition at line 140 of file string_table.F.

Here is the caller graph for this function:

string_table_allocate()

subroutine, public string_table::string_table_allocate

allocates the string table

History

09.2006 created [Joost VandeVondele]

Note

this needs to be done only once at program startup, before any use of other procedures of this module. The scope of this table is global

Definition at line 155 of file string_table.F.

Here is the caller graph for this function:

string_table_deallocate()

subroutine, public string_table::string_table_deallocate

(

integer, intent(in)

iw

)

deallocates the string table

Parameters

iw	a unit to which some info about the table usage can be printed

History

09.2006 created [Joost VandeVondele]

Note

This should be done before program termination, all associated ids become meaningless

Definition at line 169 of file string_table.F.

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

hash_table

type(hash_element_type), dimension(:), allocatable, target, save string_table::hash_table

Definition at line 55 of file string_table.F.