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= Mmap
The Mmap class implement memory-mapped file objects
=== The variables $' and $` are not available with gsub! and sub!
== SuperClass
== Included Modules
* Comparable
* Enumerable
== Class Methods
--- lockall(flag)
disable paging of all pages mapped. ((|flag|)) can be
((|Mmap::MCL_CURRENT|)) or ((|Mmap::MCL_FUTURE|))
--- new(file, mode = "r", protection = Mmap::MAP_SHARED, options = {})
--- new(nil, length, protection = Mmap::MAP_SHARED, options = {})
create a new Mmap object
: ((|file|))
Pathname of the file, if ((|nil|)) is given an anonymous map
is created ((|Mmanp::MAP_ANON|))
: ((|mode|))
Mode to open the file, it can be "r", "w", "rw", "a"
: ((|protection|))
specify the nature of the mapping
: ((|Mmap::MAP_SHARED|))
Creates a mapping that's shared with all other processes
mapping the same areas of the file.
The default value is ((|Mmap::MAP_SHARED|))
: ((|Mmap::MAP_PRIVATE|))
Creates a private copy-on-write mapping, so changes to the
contents of the mmap object will be private to this process
: ((|options|))
Hash. If one of the options ((|length|)) or ((|offset|))
is specified it will not possible to modify the size of
the mapped file.
: ((|length|))
Maps ((|length|)) bytes from the file
: ((|offset|))
The mapping begin at ((|offset|))
: ((|advice|))
The type of the access (see #madvise)
--- unlockall
reenable paging
== Methods
--- extend(count)
add ((|count|)) bytes to the file (i.e. pre-extend the file)
--- madvise(advice)
((|advice|)) can have the value ((|Mmap::MADV_NORMAL|)),
((|Mmap::MADV_RANDOM|)), ((|Mmap::MADV_SEQUENTIAL|)),
((|Mmap::MADV_WILLNEED|)), ((|Mmap::MADV_DONTNEED|))
--- mprotect(mode)
change the mode, value must be "r", "w" or "rw"
--- mlock
disable paging
--- msync
--- flush
flush the file
--- munlock
reenable paging
--- munmap
terminate the association
=== Other methods with the same syntax than for the class String
--- self == other
--- self > other
--- self >= other
--- self < other
--- self <= other
--- self === other
used for ((|case|)) comparison
--- self << other
append ((|other|)) to ((|self|))
--- self =~ other
return an index of the match
--- self[nth]
retrieve the ((|nth|)) character
--- self[start..last]
return a substring from ((|start|)) to ((|last|))
--- self[start, length]
return a substring of ((|lenght|)) characters from ((|start|))
--- self[nth] = val
change the ((|nth|)) character with ((|val|))
--- self[start..last] = val
change substring from ((|start|)) to ((|last|)) with ((|val|))
--- self[start, len] = val
replace ((|length|)) characters from ((|start|)) with ((|val|)).
--- self <=> other
comparison : return -1, 0, 1
--- casecmp(other) >= 1.7.1
--- concat(other)
append the contents of ((|other|))
--- capitalize!
change the first character to uppercase letter
--- chop!
chop off the last character
--- chomp!([rs])
chop off the line ending character, specified by ((|rs|))
--- count(o1 [, o2, ...])
each parameter defines a set of character to count
--- crypt(salt)
crypt with ((|salt|))
--- delete!(str)
delete every characters included in ((|str|))
--- downcase!
change all uppercase character to lowercase character
--- each_byte {|char|...}
iterate on each byte
--- each([rs]) {|line|...}
--- each_line([rs]) {|line|...}
iterate on each line
--- empty?
return ((|true|)) if the file is empty
--- freeze
freeze the current file
--- frozen
return ((|true|)) if the file is frozen
--- gsub!(pattern, replace)
global substitution
--- gsub!(pattern) {|str|...}
global substitution
--- include?(other)
return ((|true|)) if ((|other|)) is found
--- index(substr[, pos])
return the index of ((|substr|))
--- insert(index, str) >= 1.7.1
insert ((|str|)) at ((|index|))
--- length
return the size of the file
--- reverse!
reverse the content of the file
--- rindex(substr[, pos])
return the index of the last occurrence of ((|substr|))
--- scan(pattern)
return an array of all occurence matched by ((|pattern|))
--- scan(pattern) {|str| ...}
iterate through the file, matching the ((|pattern|))
--- size
return the size of the file
--- slice
same than ((|[]|))
--- slice!
delete the specified portion of the file
--- split([sep[, limit]])
splits into a list of strings and return this array
--- squeeze!([str])
squeezes sequences of the same characters which is included in ((|str|))
--- strip!
removes leading and trailing whitespace
--- sub!(pattern, replace)
--- sub!(pattern) {|str| ...}
--- sum([bits])
return a checksum
--- swapcase!
replaces all lowercase characters to uppercase characters, and vice-versa
--- tr!(search, replace)
translate the character from ((|search|)) to ((|replace|))
--- tr_s!(search, replace)
translate the character from ((|search|)) to ((|replace|)), then
squeeze sequence of the same characters
--- upcase!
replaces all lowercase characters to downcase characters