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note description: "Sequential files, viewed as persistent sequences of characters" library: "Free implementation of ELKS library" status: "See notice at end of class." legal: "See notice at end of class." date: "$Date: 2019-08-02 00:08:17 -0800 (Fri, 02 Aug 2019) $" revision: "$Revision: 103380 $" deferred class interface FILE feature -- Initialization make_create_read_write (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file for both reading and writing; -- create it if it does not exist. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_read: is_open_read open_write: is_open_write make_open_append (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file in append-only mode. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_append: is_open_append make_open_read (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file in read mode. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_read: is_open_read make_open_read_append (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file for reading anywhere -- but writing at the end only. -- Create file if it does not exist. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_read: is_open_read open_append: is_open_append make_open_read_write (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file for both reading and writing. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_read: is_open_read open_write: is_open_write make_open_temporary -- Create a file object with a unique temporary file name, -- with read/write mode. ensure exists: exists open_read: is_open_read open_write: is_open_write make_open_temporary_with_prefix (a_prefix: READABLE_STRING_GENERAL) -- Create a file object with a unique temporary file name with prefix a_prefix, -- with read/write mode. ensure exists: exists open_read: is_open_read open_write: is_open_write make_open_write (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name -- and open file for writing; -- create it if it does not exist. require string_exists: fn /= Void string_not_empty: not fn.is_empty ensure file_named: internal_name = fn exists: exists open_write: is_open_write make_with_name (fn: READABLE_STRING_GENERAL) -- Create file object with fn as file name. require fn_exists: fn /= Void fn_not_empty: not fn.is_empty ensure file_named: internal_name = fn file_closed: is_closed make_with_path (a_path: PATH) -- Create file object with a_path as path. require a_path_attached: a_path /= Void a_path_not_empty: not a_path.is_empty ensure path_set: path.same_as (a_path) file_closed: is_closed feature -- Access access_date: INTEGER_32 -- Time stamp of last access made to the inode. require file_exists: exists date: INTEGER_32 -- Time stamp (time of last modification) require file_exists: exists descriptor: INTEGER_32 -- File descriptor as used by the operating system. require -- from IO_MEDIUM valid_handle: descriptor_available require else file_opened: not is_closed descriptor_available: BOOLEAN -- Is the handle available after class has been -- created? file_info: FILE_INFO -- Collected information about the file. file_pointer: POINTER -- File pointer as required in C generating_type: TYPE [detachable FILE] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty group_id: INTEGER_32 -- Group identification of owner require file_exists: exists has (v: like item): BOOLEAN -- Does structure include an occurrence of v? -- (Reference or object equality, -- based on object_comparison.) -- (from LINEAR) require -- from CONTAINER True ensure -- from CONTAINER not_found_in_empty: Result implies not is_empty index: INTEGER_32 -- Index of current position -- (from LINEAR) index_of (v: like item; i: INTEGER_32): INTEGER_32 -- Index of i-th occurrence of v. -- 0 if none. -- (Reference or object equality, -- based on object_comparison.) -- (from LINEAR) require -- from LINEAR positive_occurrences: i > 0 ensure -- from LINEAR non_negative_result: Result >= 0 inode: INTEGER_32 -- I-node number require file_exists: exists item: CHARACTER_8 -- Current item require -- from ACTIVE readable: readable require -- from TRAVERSABLE not_off: not off item_for_iteration: CHARACTER_8 -- Item at current position -- (from LINEAR) require -- from LINEAR not_off: not off links: INTEGER_32 -- Number of links on file require file_exists: exists null_name: STRING_8 -- Null device name. ensure instance_free: class null_path: PATH -- Null device path. ensure instance_free: class occurrences (v: like item): INTEGER_32 -- Number of times v appears. -- (Reference or object equality, -- based on object_comparison.) -- (from LINEAR) require -- from BAG True ensure -- from BAG non_negative_occurrences: Result >= 0 owner_name: STRING_8 -- Name of owner require file_exists: exists path: PATH -- Associated path of Current. ensure entry_not_empty: not Result.is_empty position: INTEGER_32 -- Current cursor position. protection: INTEGER_32 -- Protection mode, in decimal value require file_exists: exists retrieved: detachable ANY -- Retrieved object structure -- To access resulting object under correct type, -- use assignment attempt. -- Will raise an exception (code Retrieve_exception) -- if content is not a stored Eiffel structure. require -- from IO_MEDIUM is_readable: readable support_storable: support_storable separator: CHARACTER_8 -- ASCII code of character following last word read user_id: INTEGER_32 -- User identification of owner require file_exists: exists feature -- Measurement count: INTEGER_32 -- Size in bytes (0 if no associated physical file) ensure -- from FINITE count_non_negative: Result >= 0 feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal (other: FILE): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: FILE): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result same_file (fn: READABLE_STRING_GENERAL): BOOLEAN -- Is current file the same as a_filename? require fn_not_void: fn /= Void fn_not_empty: not fn.is_empty frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal (other: FILE): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report access_exists: BOOLEAN -- Does physical file exist? -- (Uses real UID.) after: BOOLEAN -- Is there no valid cursor position to the right of cursor position? before: BOOLEAN -- Is there no valid cursor position to the left of cursor position? bytes_read: INTEGER_32 -- Last number of bytes read by read_to_managed_pointer. -- (from IO_MEDIUM) changeable_comparison_criterion: BOOLEAN -- May object_comparison be changed? -- (Answer: yes by default.) -- (from CONTAINER) conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void end_of_file: BOOLEAN -- Has an EOF been detected? require opened: not is_closed exhausted: BOOLEAN -- Has structure been completely explored? -- (from LINEAR) ensure -- from LINEAR exhausted_when_off: off implies Result exists: BOOLEAN -- Does physical file exist? -- (Uses effective UID.) require -- from IO_MEDIUM True ensure then unchanged_mode: mode = old mode extendible: BOOLEAN -- May new items be added? require -- from COLLECTION True require -- from IO_MEDIUM True file_readable: BOOLEAN -- Is there a current item that may be read? file_writable: BOOLEAN -- Is there a current item that may be modified? Full: BOOLEAN = False -- Is structure filled to capacity? is_access_executable: BOOLEAN -- Is file executable by real UID? require file_exists: exists is_access_owner: BOOLEAN -- Is file owned by real UID? require file_exists: exists is_access_readable: BOOLEAN -- Is file readable by real UID? require file_exists: exists is_access_writable: BOOLEAN -- Is file writable by real UID? require file_exists: exists is_block: BOOLEAN -- Is file a block special file? require file_exists: exists is_character: BOOLEAN -- Is file a character special file? require file_exists: exists is_closed: BOOLEAN -- Is file closed? is_creatable: BOOLEAN -- Is file creatable in parent directory? -- (Uses effective UID to check that parent is writable -- and file does not exist.) is_device: BOOLEAN -- Is file a device? require file_exists: exists is_directory: BOOLEAN -- Is file a directory? require file_exists: exists is_empty: BOOLEAN -- Is structure empty? -- (from FINITE) is_executable: BOOLEAN -- Is file executable? -- (Checks execute permission for effective UID.) require -- from IO_MEDIUM handle_exists: exists is_fifo: BOOLEAN -- Is file a named pipe? require file_exists: exists is_inserted (v: CHARACTER_8): BOOLEAN -- Has v been inserted by the most recent insertion? -- (By default, the value returned is equivalent to calling -- has (v). However, descendants might be able to provide more -- efficient implementations.) -- (from COLLECTION) is_open_append: BOOLEAN -- Is file open for appending? is_open_read: BOOLEAN -- Is file open for reading? is_open_write: BOOLEAN -- Is file open for writing? is_owner: BOOLEAN -- Is file owned by effective UID? require file_exists: exists is_plain: BOOLEAN -- Is file a plain file? require file_exists: exists is_plain_text: BOOLEAN -- Is file reserved for text (character sequences)? -- (from IO_MEDIUM) is_readable: BOOLEAN -- Is file readable? -- (Checks permission for effective UID.) require -- from IO_MEDIUM handle_exists: exists is_setgid: BOOLEAN -- Is file setgid? require file_exists: exists is_setuid: BOOLEAN -- Is file setuid? require file_exists: exists is_socket: BOOLEAN -- Is file a named socket? require file_exists: exists is_sticky: BOOLEAN -- Is file sticky (for memory swaps)? require file_exists: exists is_symlink: BOOLEAN -- Is file a symbolic link? require file_exists: path_exists is_writable: BOOLEAN -- Is file writable? -- (Checks write permission for effective UID.) require -- from IO_MEDIUM handle_exists: exists last_character: CHARACTER_8 -- Last character read by read_character -- (from IO_MEDIUM) last_double: REAL_64 -- Last double read by read_double -- (from IO_MEDIUM) last_integer: INTEGER_32 -- Last integer read by read_integer -- (from IO_MEDIUM) last_integer_16: INTEGER_16 -- Last 16-bit integer read by read_integer_16 -- (from IO_MEDIUM) last_integer_32: INTEGER_32 -- Synonymy of last_integer -- (from IO_MEDIUM) last_integer_64: INTEGER_64 -- Last 64-bit integer read by read_integer_64 -- (from IO_MEDIUM) last_integer_8: INTEGER_8 -- Last 8-bit integer read by read_integer_8 -- (from IO_MEDIUM) last_natural: NATURAL_32 -- Last 32-bit natural read by read_natural -- (from IO_MEDIUM) last_natural_16: NATURAL_16 -- Last 16-bit natural read by read_natural_16 -- (from IO_MEDIUM) last_natural_32: NATURAL_32 -- Synonymy of last_natural -- (from IO_MEDIUM) last_natural_64: NATURAL_64 -- Last 64-bit natural read by read_natural_64 -- (from IO_MEDIUM) last_natural_8: NATURAL_8 -- Last 8-bit natural read by read_natural_8 -- (from IO_MEDIUM) last_real: REAL_32 -- Last real read by read_real -- (from IO_MEDIUM) last_real_32: REAL_32 -- Last 32-bit real read by read_real_32. -- Synonym of last_real. -- (from IO_MEDIUM) last_real_64: REAL_64 -- Last 64-bit real read by read_real_64. -- Synonym of last_double. -- (from IO_MEDIUM) last_string: STRING_8 -- Last string read -- (from IO_MEDIUM) object_comparison: BOOLEAN -- Must search operations use equal rather than = -- for comparing references? (Default: no, use =.) -- (from CONTAINER) off: BOOLEAN -- Is there no item? require -- from TRAVERSABLE True path_exists: BOOLEAN -- Does physical file name exist without resolving -- symbolic links? ensure then unchanged_mode: mode = old mode prunable: BOOLEAN -- Is there an item to be removed? readable: BOOLEAN -- Is there a current item that may be read? -- (from SEQUENCE) require -- from ACTIVE True require -- from IO_MEDIUM handle_exists: exists replaceable: BOOLEAN -- Can current item be replaced? same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) support_storable: BOOLEAN -- Can medium be used to store an Eiffel object? -- (from IO_MEDIUM) writable: BOOLEAN -- Is there a current item that may be modified? -- (from SEQUENCE) feature -- Status setting close -- Close file. require -- from IO_MEDIUM medium_is_open: not is_closed ensure then is_closed: is_closed compare_objects -- Ensure that future search operations will use equal -- rather than = for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion: changeable_comparison_criterion ensure -- from CONTAINER object_comparison compare_references -- Ensure that future search operations will use = -- rather than equal for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion: changeable_comparison_criterion ensure -- from CONTAINER reference_comparison: not object_comparison create_read_write -- Open file in read and write mode; -- create it if it does not exist. require is_closed: is_closed ensure exists: exists open_read: is_open_read open_write: is_open_write fd_open_append (fd: INTEGER_32) -- Open file of descriptor fd in append mode. ensure exists: exists open_append: is_open_append fd_open_read (fd: INTEGER_32) -- Open file of descriptor fd in read-only mode. ensure exists: exists open_read: is_open_read fd_open_read_append (fd: INTEGER_32) -- Open file of descriptor fd -- in read and write-at-end mode. ensure exists: exists open_read: is_open_read open_append: is_open_append fd_open_read_write (fd: INTEGER_32) -- Open file of descriptor fd in read-write mode. ensure exists: exists open_read: is_open_read open_write: is_open_write fd_open_write (fd: INTEGER_32) -- Open file of descriptor fd in write mode. ensure exists: exists open_write: is_open_write open_append -- Open file in append-only mode; -- create it if it does not exist. require is_closed: is_closed ensure exists: exists open_append: is_open_append open_read -- Open file in read-only mode. require is_closed: is_closed ensure exists: exists open_read: is_open_read open_read_append -- Open file in read and write-at-end mode; -- create it if it does not exist. require is_closed: is_closed ensure exists: exists open_read: is_open_read open_append: is_open_append open_read_write -- Open file in read and write mode. require is_closed: is_closed ensure exists: exists open_read: is_open_read open_write: is_open_write open_write -- Open file in write-only mode; -- create it if it does not exist. ensure exists: exists open_write: is_open_write recreate_read_write (fname: READABLE_STRING_GENERAL) -- Reopen in read-write mode with file of name fname; -- create file if it does not exist. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_read: is_open_read open_write: is_open_write reopen_append (fname: READABLE_STRING_GENERAL) -- Reopen in append mode with file of name fname; -- create file if it does not exist. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_append: is_open_append reopen_read (fname: READABLE_STRING_GENERAL) -- Reopen in read-only mode with file of name fname; -- create file if it does not exist. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_read: is_open_read reopen_read_append (fname: READABLE_STRING_GENERAL) -- Reopen in read and write-at-end mode with file -- of name fname; create file if it does not exist. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_read: is_open_read open_append: is_open_append reopen_read_write (fname: READABLE_STRING_GENERAL) -- Reopen in read-write mode with file of name fname. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_read: is_open_read open_write: is_open_write reopen_write (fname: READABLE_STRING_GENERAL) -- Reopen in write-only mode with file of name fname; -- create file if it does not exist. require is_open: not is_closed valid_name: fname /= Void ensure exists: exists open_write: is_open_write feature -- Cursor movement back -- Go back one position. require -- from BILINEAR not_before: not before finish -- Go to last position. require -- from LINEAR True require else file_opened: not is_closed forth -- Go to next position. require -- from LINEAR not_after: not after require else file_opened: not is_closed go (abs_position: INTEGER_32) -- Go to the absolute position. -- (New position may be beyond physical length.) require file_opened: not is_closed non_negative_argument: abs_position >= 0 move (offset: INTEGER_32) -- Advance by offset from current location. require file_opened: not is_closed next_line -- Move to next input line. require is_readable: file_readable recede (abs_position: INTEGER_32) -- Go to the absolute position backwards, -- starting from end of file. require file_opened: not is_closed non_negative_argument: abs_position >= 0 search (v: like item) -- Move to first position (at or after current -- position) where item and v are equal. -- If structure does not include v ensure that -- exhausted will be true. -- (Reference or object equality, -- based on object_comparison.) -- (from BILINEAR) ensure -- from LINEAR object_found: (not exhausted and object_comparison) implies v ~ item item_found: (not exhausted and not object_comparison) implies v = item start -- Go to first position. require -- from TRAVERSABLE True require else file_opened: not is_closed feature -- Element change add_permission (who, what: STRING_8) -- Add read, write, execute or setuid permission -- for who ('u', 'g' or 'o') to what. require who_is_not_void: who /= Void what_is_not_void: what /= Void file_descriptor_exists: exists append (f: like Current) -- Append a copy of the contents of f. require -- from SEQUENCE argument_not_void: f /= Void require else target_is_closed: is_closed source_is_closed: f.is_closed ensure -- from SEQUENCE new_count: count >= old count ensure then new_count: count = old count + f.count files_closed: f.is_closed and is_closed basic_store (object: ANY) -- Produce an external representation of the -- entire object structure reachable from object. -- Retrievable within current system only. require -- from IO_MEDIUM object_not_void: object /= Void extendible: extendible support_storable: support_storable change_date: INTEGER_32 -- Time stamp of last change. require file_exists: exists change_group (new_group_id: INTEGER_32) -- Change group of file to new_group_id found in -- system password file. require file_exists: exists change_mode (mask: INTEGER_32) -- Replace mode by mask. require file_exists: exists change_owner (new_owner_id: INTEGER_32) -- Change owner of file to new_owner_id found in -- system password file. On some systems this -- requires super-user privileges. require file_exists: exists extend (v: CHARACTER_8) -- Include v at end. require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) fill (other: CONTAINER [CHARACTER_8]) -- Fill with as many items of other as possible. -- The representations of other and current structure -- need not be the same. -- (from COLLECTION) require -- from COLLECTION other_not_void: other /= Void extendible: extendible flush -- Flush buffered data to disk. -- Note that there is no guarantee that the operating -- system will physically write the data to the disk. -- At least it will end up in the buffer cache, -- making the data visible to other processes. require is_open: not is_closed force (v: like item) -- Add v to end. -- (from SEQUENCE) require -- from SEQUENCE extendible: extendible ensure then -- from SEQUENCE new_count: count = old count + 1 item_inserted: has (v) general_store (object: ANY) -- Produce an external representation of the -- entire object structure reachable from object. -- Retrievable from other systems for same platform -- (machine architecture). require -- from IO_MEDIUM object_not_void: object /= Void extendible: extendible support_storable: support_storable independent_store (object: ANY) -- Produce an external representation of the -- entire object structure reachable from object. -- Retrievable from other systems for the same or other -- platform (machine architecture). require -- from IO_MEDIUM object_not_void: object /= Void extendible: extendible support_storable: support_storable link (fn: READABLE_STRING_GENERAL) -- Link current file to fn. -- fn must not already exist. require file_exists: exists new_line -- Write a new line character at current position. -- Was declared in FILE as synonym of put_new_line. require -- from IO_MEDIUM extendible: extendible put (v: like item) -- Add v to end. -- (from SEQUENCE) require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from SEQUENCE new_count: count = old count + 1 put_boolean (b: BOOLEAN) -- Write b at current position. -- Was declared in FILE as synonym of putbool. require -- from IO_MEDIUM extendible: extendible put_character (c: CHARACTER_8) -- Write c at current position. -- Was declared in FILE as synonym of putchar. require -- from IO_MEDIUM extendible: extendible put_double (d: REAL_64) -- Write d at current position. -- Was declared in FILE as synonym of putdouble. require -- from IO_MEDIUM extendible: extendible put_integer (i: INTEGER_32) -- Write i at current position. -- Was declared in FILE as synonym of putint. require -- from IO_MEDIUM extendible: extendible put_managed_pointer (p: MANAGED_POINTER; start_pos, nb_bytes: INTEGER_32) -- Put data of length nb_bytes pointed by start_pos index in p at -- current position. require -- from IO_MEDIUM p_not_void: p /= Void p_large_enough: p.count >= nb_bytes + start_pos nb_bytes_non_negative: nb_bytes >= 0 extendible: extendible put_new_line -- Write a new line character at current position. -- Was declared in FILE as synonym of new_line. require -- from IO_MEDIUM extendible: extendible put_real (r: REAL_32) -- Write r at current position. -- Was declared in FILE as synonym of putreal. require -- from IO_MEDIUM extendible: extendible put_string (s: READABLE_STRING_8) -- Write s at current position. -- Was declared in FILE as synonym of putstring. require -- from IO_MEDIUM extendible: extendible non_void: s /= Void putbool (b: BOOLEAN) -- Write b at current position. -- Was declared in FILE as synonym of put_boolean. require -- from IO_MEDIUM extendible: extendible putchar (c: CHARACTER_8) -- Write c at current position. -- Was declared in FILE as synonym of put_character. require -- from IO_MEDIUM extendible: extendible putdouble (d: REAL_64) -- Write d at current position. -- Was declared in FILE as synonym of put_double. require -- from IO_MEDIUM extendible: extendible putint (i: INTEGER_32) -- Write i at current position. -- Was declared in FILE as synonym of put_integer. require -- from IO_MEDIUM extendible: extendible putreal (r: REAL_32) -- Write r at current position. -- Was declared in FILE as synonym of put_real. require -- from IO_MEDIUM extendible: extendible putstring (s: READABLE_STRING_8) -- Write s at current position. -- Was declared in FILE as synonym of put_string. require -- from IO_MEDIUM extendible: extendible non_void: s /= Void remove_permission (who, what: STRING_8) -- Remove read, write, execute or setuid permission -- for who ('u', 'g' or 'o') to what. require who_is_not_void: who /= Void what_is_not_void: what /= Void file_descriptor_exists: exists rename_file (new_name: READABLE_STRING_GENERAL) -- Change file name to new_name require new_name_not_void: new_name /= Void new_name_not_empty: not new_name.is_empty file_exists: exists ensure name_changed: internal_name = new_name rename_path (new_path: PATH) -- Change file name to new_path require new_path_not_void: new_path /= Void new_path_not_empty: not new_path.is_empty file_exists: exists ensure name_changed: internal_name.same_string (new_path.name) set_access (time: INTEGER_32) -- Stamp with time (access only). require file_exists: exists ensure acess_date_updated: access_date = time date_unchanged: date = old date set_date (time: INTEGER_32) -- Stamp with time (modification time only). require file_exists: exists ensure access_date_unchanged: access_date = old access_date date_updated: date = time stamp (time: INTEGER_32) -- Stamp with time (for both access and modification). require file_exists: exists ensure date_updated: date = time touch -- Update time stamp (for both access and modification). require file_exists: exists ensure date_changed: date /= old date feature -- Removal delete -- Remove link with physical file. -- File does not physically disappear from the disk -- until no more processes reference it. -- I/O operations on it are still possible. -- A directory must be empty to be deleted. require exists: path_exists dispose -- Ensure this medium is closed when garbage collected. -- (from IO_MEDIUM) prune_all (v: like item) -- Remove all occurrences of v; go off. -- (from SEQUENCE) require -- from COLLECTION prunable: prunable ensure -- from COLLECTION no_more_occurrences: not has (v) reset (fn: READABLE_STRING_GENERAL) -- Change file name to fn and reset -- file descriptor and all information. require valid_file_name: fn /= Void ensure file_renamed: internal_name = fn file_closed: is_closed reset_path (fp: PATH) -- Change file name to fp and reset -- file descriptor and all information. require valid_file_name: fp /= Void ensure file_closed: is_closed wipe_out -- Remove all items. require -- from COLLECTION prunable: prunable require else is_closed: is_closed ensure -- from COLLECTION wiped_out: is_empty feature -- Conversion linear_representation: LINEAR [CHARACTER_8] -- Representation as a linear structure -- (from LINEAR) require -- from CONTAINER True feature -- Duplication copy (other: FILE) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: FILE) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: FILE -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: FILE) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: FILE -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: FILE -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable FILE -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class feature -- Obsolete lastchar: CHARACTER_8 -- Last character read by read_character -- (from IO_MEDIUM) lastdouble: REAL_64 -- Last double read by read_double -- (from IO_MEDIUM) lastint: INTEGER_32 -- Last integer read by read_integer -- (from IO_MEDIUM) lastreal: REAL_32 -- Last real read by read_real -- (from IO_MEDIUM) laststring: like last_string -- Last string read -- (from IO_MEDIUM) feature -- Inapplicable prune (v: like item) -- Remove an occurrence of v if any. require -- from COLLECTION prunable: prunable ensure then count <= old count remove -- Remove current item. require -- from ACTIVE prunable: prunable writable: writable replace (v: like item) -- Replace current item by v. require -- from ACTIVE writable: writable replaceable: replaceable ensure -- from ACTIVE item_replaced: item = v feature -- Convenience copy_to (file: like Current) -- Copy content of current from current cursor -- position to end of file into file from -- current cursor position of file. require file_not_void: file /= Void file_is_open_write: file.is_open_write current_is_open_read: is_open_read feature -- Input read_character -- Read a new character. -- Make result available in last_character. -- Was declared in FILE as synonym of readchar. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_double -- Read a new double. -- Make result available in last_double. -- Was declared in FILE as synonym of readdouble and read_real_64. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_integer -- Read a new integer. -- Make result available in last_integer. -- Was declared in FILE as synonym of readint. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_integer_16 -- Read a new 16-bit integer. -- Make result available in last_integer_16. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_integer_32 -- Read a new 32-bit integer. -- Make result available in last_integer. -- Was declared in IO_MEDIUM as synonym of read_integer and readint. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_integer_64 -- Read a new 64-bit integer. -- Make result available in last_integer_64. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_integer_8 -- Read a new 8-bit integer. -- Make result available in last_integer_8. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_line -- Read a string until new line or end of file. -- Make result available in last_string. -- New line will be consumed but not part of last_string. -- Was declared in FILE as synonym of readline. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void read_line_thread_aware -- Read characters until a new line or -- end of medium. -- Make result available in last_string. -- Functionally identical to read_line but -- won't prevent garbage collection from occurring -- while blocked waiting for data, though data must -- be copied an extra time. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void read_natural -- Read a new 32-bit natural. -- Make result available in last_natural. -- Was declared in IO_MEDIUM as synonym of read_natural_32. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_natural_16 -- Read a new 16-bit natural. -- Make result available in last_natural_16. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_natural_32 -- Read a new 32-bit natural. -- Make result available in last_natural. -- Was declared in IO_MEDIUM as synonym of read_natural. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_natural_64 -- Read a new 64-bit natural. -- Make result available in last_natural_64. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_natural_8 -- Read a new 8-bit natural. -- Make result available in last_natural_8. -- (from IO_MEDIUM) require -- from IO_MEDIUM is_readable: readable read_real -- Read a new real. -- Make result available in last_real. -- Was declared in FILE as synonym of readreal and read_real_32. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_real_32 -- Read a new real. -- Make result available in last_real. -- Was declared in FILE as synonym of read_real and readreal. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_real_64 -- Read a new double. -- Make result available in last_double. -- Was declared in FILE as synonym of read_double and readdouble. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable read_stream (nb_char: INTEGER_32) -- Read a string of at most nb_char bound characters -- or until end of file. -- Make result available in last_string. -- Was declared in FILE as synonym of readstream. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void read_stream_thread_aware (nb_char: INTEGER_32) -- Read a string of at most nb_char bound characters -- or until end of medium is encountered. -- Make result available in last_string. -- Functionally identical to read_stream but -- won't prevent garbage collection from occurring -- while blocked waiting for data, though data must -- be copied an extra time. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void read_to_managed_pointer (p: MANAGED_POINTER; start_pos, nb_bytes: INTEGER_32) -- Read at most nb_bytes bound bytes and make result -- available in p at position start_pos. require -- from IO_MEDIUM p_not_void: p /= Void p_large_enough: p.count >= nb_bytes + start_pos nb_bytes_non_negative: nb_bytes >= 0 is_readable: readable require else p_not_void: p /= Void p_large_enough: p.count >= nb_bytes + start_pos is_readable: file_readable ensure -- from IO_MEDIUM bytes_read_non_negative: bytes_read >= 0 bytes_read_not_too_big: bytes_read <= nb_bytes read_to_string (a_string: STRING_8; pos, nb: INTEGER_32): INTEGER_32 -- Fill a_string, starting at position pos with at -- most nb characters read from current file. -- Return the number of characters actually read. require is_readable: file_readable not_end_of_file: not end_of_file a_string_not_void: a_string /= Void valid_position: a_string.valid_index (pos) nb_large_enough: nb > 0 nb_small_enough: nb <= a_string.count - pos + 1 ensure nb_char_read_large_enough: Result >= 0 nb_char_read_small_enough: Result <= nb character_read: not end_of_file implies Result > 0 read_word -- Read a string, excluding white space and stripping -- leading white space. -- Make result available in last_string. -- White space characters are: blank, new_line, tab, -- vertical tab, formfeed, end of file. -- Was declared in FILE as synonym of readword. require is_readable: file_readable ensure last_string_not_void: last_string /= Void read_word_thread_aware -- Read a string, excluding white space and stripping -- leading white space. -- Make result available in last_string. -- White space characters are: blank, new_line, tab, -- vertical tab, formfeed, end of file. require is_readable: file_readable ensure last_string_not_void: last_string /= Void readchar -- Read a new character. -- Make result available in last_character. -- Was declared in FILE as synonym of read_character. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable readdouble -- Read a new double. -- Make result available in last_double. -- Was declared in FILE as synonym of read_double and read_real_64. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable readint -- Read a new integer. -- Make result available in last_integer. -- Was declared in FILE as synonym of read_integer. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable readline -- Read a string until new line or end of file. -- Make result available in last_string. -- New line will be consumed but not part of last_string. -- Was declared in FILE as synonym of read_line. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void readreal -- Read a new real. -- Make result available in last_real. -- Was declared in FILE as synonym of read_real and read_real_32. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable readstream (nb_char: INTEGER_32) -- Read a string of at most nb_char bound characters -- or until end of file. -- Make result available in last_string. -- Was declared in FILE as synonym of read_stream. require -- from IO_MEDIUM is_readable: readable require else is_readable: file_readable ensure -- from IO_MEDIUM last_string_not_void: last_string /= Void readword -- Read a string, excluding white space and stripping -- leading white space. -- Make result available in last_string. -- White space characters are: blank, new_line, tab, -- vertical tab, formfeed, end of file. -- Was declared in FILE as synonym of read_word. require is_readable: file_readable ensure last_string_not_void: last_string /= Void feature -- Iteration do_all (action: PROCEDURE [CHARACTER_8]) -- Apply action to every item. -- Semantics not guaranteed if action changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE action_exists: action /= Void do_if (action: PROCEDURE [CHARACTER_8]; test: FUNCTION [CHARACTER_8, BOOLEAN]) -- Apply action to every item that satisfies test. -- Semantics not guaranteed if action or test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE action_exists: action /= Void test_exists: test /= Void for_all (test: FUNCTION [CHARACTER_8, BOOLEAN]): BOOLEAN -- Is test true for all items? -- Semantics not guaranteed if test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE test_exists: test /= Void ensure then -- from LINEAR empty: is_empty implies Result new_cursor: FILE_ITERATION_CURSOR -- Fresh cursor associated with current structure ensure -- from ITERABLE result_attached: Result /= Void there_exists (test: FUNCTION [CHARACTER_8, BOOLEAN]): BOOLEAN -- Is test true for at least one item? -- Semantics not guaranteed if test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE test_exists: test /= Void feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class put_integer_16 (i: INTEGER_16) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_integer_32 (i: INTEGER_32) -- Write i to medium. -- Was declared in IO_MEDIUM as synonym of put_integer and putint. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_integer_64 (i: INTEGER_64) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_integer_8 (i: INTEGER_8) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_natural (i: NATURAL_32) -- Write i to medium. -- Was declared in IO_MEDIUM as synonym of put_natural_32. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_natural_16 (i: NATURAL_16) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_natural_32 (i: NATURAL_32) -- Write i to medium. -- Was declared in IO_MEDIUM as synonym of put_natural. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_natural_64 (i: NATURAL_64) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_natural_8 (i: NATURAL_8) -- Write i to medium. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_real_32 (r: REAL_32) -- Write r to medium. -- Was declared in IO_MEDIUM as synonym of put_real and putreal. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible put_real_64 (d: REAL_64) -- Write d to medium. -- Was declared in IO_MEDIUM as synonym of put_double and putdouble. -- (from IO_MEDIUM) require -- from IO_MEDIUM extendible: extendible frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void invariant valid_mode: Closed_file <= mode and mode <= Append_read_file name_exists: internal_name /= Void name_not_empty: not internal_name.is_empty -- from FINITE empty_definition: is_empty = (count = 0) -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from ACTIVE writable_constraint: writable implies readable empty_constraint: is_empty implies (not readable) and (not writable) -- from BILINEAR not_both: not (after and before) before_constraint: before implies off -- from LINEAR after_constraint: after implies off -- from TRAVERSABLE empty_constraint: is_empty implies off note copyright: "Copyright (c) 1984-2019, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class FILE
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