2017-02-19  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Version 5.9.0 released.

	* bitvector.h, bitvector.c: Doc fixes.

	* config.h.in (VERSION): From 5.8.1 to 5.9.0.
	Doc fixes.

	* util.c (lines_differ):
	Signature changed: the parameter `argl' is now of type
	`const argslist*' instead of `argslist*'.
	(lines_differ): `ghostmask', `pblurmask', and `tblurmask'
	are now declared as pointers to `const unsigned' data.
	(lines_differ): `Ghostmask', `Pblurmask', and `Tblurmask'
	are now declared as pointers to `const unsigned' data.

	(lines_differ): getBitAtPosition() is now called on the mask of the command
	line options to if the bit _SI_MASK is on.

	* thrlist.c, read_line.c: Doc fixes.

	* options.c (print_version): Copyright statement updated.
	(print_help): Help message updated.

	(nfset): The bit fields corresponding to the command line options
	specified by the user are now set by calling setBitAtPosition().

	(setargs): Added long option "raw".

	(setargs): The local variable `i' was renamed as `cmpRes'.
	All occurrences accordingly changed.

	(setargs): The local variable `w' is now initialized to the
	value DEF_ATMOST_NCOLS.

	(setargs): The initialization of the global variables `binary',
	`suppress_common_lines', `ignore_white_space', `expand_tabs', `speed_large_files'
	and `program_name' was moved to the function load_defaults() of main.c.
	(setargs): The structure pointed to by the argument `list' is now initialized
	in the function load_defaults() of main.c.

	(setargs): The bit fields corresponding to the command line options
	specified by the user are now set by calling setBitAtPosition().
	(setargs): getBitAtPosition() is now called on the mask of the command
	line options to check if the bits _F_MASK and _SO_MASK are off.
	(setargs): The bit fields corresponding to the command line options
	`-B', `-T', `-F', `-c', `-l', `-o', and `--raw' are also set if appropriate.
	(setargs): getBitAtPosition() is now called on the mask of the command
	line options to check if any of the bits _SV_MASK, _B_MASK, _SO_MASK,
	_Q_MASK, and _RAW_MASK is on.
	(setargs): getBitAtPosition() is now called on the mask of the command
	line options to check if the bits _V_MASK and _H_MASK are off.

	Doc fixes.

	* numutil.c: Doc fixes.

	* numdiff.h: Include "bitvector.h".
	The field `optmask' of the structure `argslist' is now of type `bitvector'.

	New structure `difference_location'.

	New structure `statlist'.
	The fields `Labserr',  `Crelerr',  `Lrelerr',  `Cabserr',
	`N1abserr', `N1disperr', `N2abserr', `N2disperr', `Nentries', and `Ndisperr'
	were moved from the structure `argslist' to the structure `statlist'.

	The _*_MASK macros were redefined as enumeration values.
	Enumeration values _ST_MASK, _SB_MASK, _SD_MASK, _SF_MASK,
	_C_MASK, and _RAW_MASK were introduced.
	New enumeration value MAX_NUMDIFF_OPTIONS.

	The OUTMODE_* macros were redefined as enumeration values.
	Enumeration value OUTMODE_RAW was introduced.

	The macros CLASSIC_FORMULA, WR_TO_FIRST_FILE, and
	WR_TO_SECOND_FILE were redefined as enumeration values.

	The declarations of the functions diff_2_files(), read_files(),
	and lines_differ() were adjusted to comply with the new signatures.

	Doc fixes.

	* new.c: Doc fixes.

	* ndselect.h: Include "bitvector.h".
	The field `optmask' of the structure `Argslist' is now of type `bitvector'.

	The ___*_MASK macros were redefined as enumeration values.
	Enumeration values ___L_MASK and ___O_MASK were introduced.
	New enumeration value MAX_NDSELECT_OPTIONS.

	Doc fixes.

	* ndselect.c (print_selversion): Copyright statement updated.

	(scan_file): getBitAtPosition() is now called on the mask of the
	command line options to determine whether the bit ___X_MASK is on or off.
	(set_args): The field `optmask' of the structure pointed to by `list'
	is now initialized by means of a call to newBitVector().
	(set_args): The bit fields corresponding to the command line options
	specified by the user are now set by calling setBitAtPosition().
	(set_args): To check if the bits ___H_MASK and ___V_MASK are off,
	getBitAtPosition() is now called on the mask of the command line options.

	(main): New boolean variables `pHelp' and `pVersion' of type `int'.
	(main): getBitAtPosition() is called on the mask
	of the command line options to check if the bit ___H_MASK is on,
	then `pHelp' is initialized with the result of this check.
	(main): getBitAtPosition() is called on the mask
	of the command line options to check if the bit ___V_MASK is on,
	then `pVersion' is initialized with the result of this check.
	(main): The information about version number, copyright, and
	distribution terms of Numdiff is now printed if `pVersion' is non-zero.
	(main): The help text of Numdiff is now printed if `pHelp' is non-zero.
	(main): The determination of the exit code of the program when
	any of the options `--help' and `--version' is specified was made more compact
	by means of the operator `?:'.

	Doc fixes.

	* main.c:
	Extern declaration of cmp_files() changed according to the new signature of the function.

	(load_defaults): New static function.
	(init_mpa_support): Signature changed: new parameter `statres'
	of type `statlist*'. All callers changed.
	(init_mpa_support): Since the fields `Labserr', `Crelerr', `Lrelerr', `Cabserr',
	`N1abserr', `N1disperr', `N2abserr', `N2disperr' were moved from the structure
	`argslist' to the new structure type `statlist', they are initialized now
	via the pointer `statres'.
	(dismiss_mpa_support): Signature changed: new parameter `statres'
	of type `statlist*'. All callers changed.
	(dismiss_mpa_support): The memory allocated for the fields `Labserr', `Crelerr',
	`Lrelerr', `Cabserr', `N1abserr', `N1disperr', `N2abserr', and `N2disperr'
	is now freed by referring to them via the pointer `statres'. 

	(compare_files): Signature changed: the parameter `list' is now of type
	`const argslist*' instead of `argslist*'.

	(isLocationDefined): New static function.

	(print_statistics): Signature changed: the parameter `list' is now of type
	`const argslist*' instead of `argslist*', new parameter `statres'
	of type `statlist*'. All callers changed.
	(print_statistics): Since the fields `Labserr', `Crelerr', `Lrelerr', `Cabserr',
	`N1abserr', `N1disperr', `N2abserr', `N2disperr', `Nentries', and `Ndisperr'
	were moved from the structure `argslist' to the new structure type `statlist',
	they are accessed now via the pointer `statres'.
	(print_statistics): Many of the messages printed to standard output
	were corrected.
	(print_statistics): If the compared files show numeric differences which are
	important to the user, the locations of the occurrences of the largest absolute
	difference are printed to standard output, as well as the locations of the
	occurrences of the largest relative difference.

	(clean_memory): New static function.

	(main): New variable `statres' of type `statlist', new boolean variables
	`pHelp' and `pVersion' of type `int'.

	(main): To initialize the structures `list' and `statres' with
	reasonable defaults, load_defaults() is called immediately before
	calling init_mpa_support().

	(main): If setargs() fails, the new function clean_memory() is now called
	before exiting to free the memory dynamically allocated for some structures.

	(main): getBitAtPosition() is called on the mask
	of the command line options to check if the bit _H_MASK is on,
	then `pHelp' is initialized with the result of this check.
	(main): getBitAtPosition() is called on the mask
	of the command line options to check if the bit _V_MASK is on,
	then `pVersion' is initialized with the result of this check.
	(main): The information about version number, copyright, and
	distribution terms of Numdiff is now printed if `pVersion' is non-zero.
	(main): The help text of Numdiff is now printed if `pHelp' is non-zero.
	(main): If the user has requested the help text or the
	information about version number, copyright, and distribution terms
	of Numdiff, the new function clean_memory() is now called
	before exiting to free the memory dynamically allocated for some structures.
	(main): The determination of the exit code of the program when
	any of the options `--help' and `--version' is specified was made more compact
	by means of the operator `?:'.

	(main): getBitAtPosition() is called on the mask
	of the command line options to check if the bit _Q_MASK is on.

	(main): If open_files() fails, the new function clean_memory() is now called
	before exiting to free the memory dynamically allocated for some structures.

	(main): getBitAtPosition() is called on the mask of the command line options
	to check if one or more of the bits _F_MASK, _Z_MASK, or _SZ_MASK is on.

	(main): If the function compare_files() has returned a negative value,
	clean_memory() and close_files() are called before exiting.

	(main): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _F_MASK is off.

	(main): If any of the functions rewind_files() and set_file_pointers()
	has returned a value different from EXIT_SUCCESS, the new function
	clean_memory() is now called before exiting to free the memory dynamically
	allocated for some structures.

	(main): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _SS_MASK is on.

	(main): In case of normal termination of the program, the new function
	clean_memory() is now called before exiting to free the memory dynamically
	allocated for some structures.

	Doc fixes.

	* linesplit.h, linesplit.c: Doc fixes.

	* io.c (print_errors): Signature changed:
	new parameter `human_readable_format' of type `int'.
	All callers changed.

	(print_errors): The old way of printing errors is now
	used only if `human_readable_format' is true:
	if `human_readable_format' is false, errors are printed in raw format.

	Doc fixes.

	* inout.c (find_and_hash_each_line): Signature changed:
	the parameter `argl' is now of type `const argslist*' instead of `argslist*'.

	(find_and_hash_each_line): getBitAtPosition() is now called on the mask
	of the command line options to check if the bit _SI_MASK is on.

	(find_and_hash_each_line): The local variables `ghostmask', `pblurmask'
	and `tblurmask' are now of type `const unsigned char*' instead of `unsigned char*'.

	(read_files): Signature changed:
	the parameter `argl' is now of type `const argslist*' instead of `argslist*'.
	(read_files): The local variables `ifs1' and `ifs2' are now
	of type `const char**' instead of `char**'.
	(read_files): `ifs1' and `ifs2' are not any longer casted to `const char**'
	when calling find_and_hash_each_line().

	* flags.c, errors.c: Doc fixes.

	* cmpfns.c:
	Extern declaration of print_errors() changed according to the new signature of the function.

	(cmp_fields): Signature changed: the parameter `argl' is now of type `const argslist*'
	instead of `argslist*', new parameter `statres' of type `statlist*', new parameters
	`Labserr_exceeded' and `Rabserr_exceeded' of type `int*'. All callers changed.

	(cmp_fields): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _2_MASK is off.
	(cmp_fields): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _SS_MASK is on.
	(cmp_fields): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _SI_MASK is on.

	(cmp_fields): The results of the statistic analysis are not any longer stored
	in the structure pointed to by `argl', but in the structure pointed to by `statres'.
	(cmp_fields): The integer variable pointed to by `Labserr_exceeded' is set to one
	if the computed absolute error exceeds the current value of the largest absolute error,
	or if these two values are equal but the computed relative error exceeds
	the relative error associated to the current value of the largest absolute error.
	(cmp_fields): The integer variable pointed to by `Rabserr_exceeded' is set to one
	if the computed relative error exceeds the current value of the largest relative error,
	or if these two values are equal but the computed absolute error exceeds
	the absolute error associated to the current value of the largest relative error.

	(cmp_lines): Signature changed: the integer parameter `output_mode' was removed,
	the parameter `argl' is now of type `const argslist*' instead of `argslist*',
	new parameter `statres' of type `statlist*'. All callers changed.

	(cmp_lines): New local integer variable `output_mode', which is initialized
	with the value passed through the `argslist' structure.
	(cmp_lines): Added output instructions in raw output mode for the case of
	a line only present in one of the compared files.

	(cmp_lines): New local integer (boolean) variables
	`Labserr_exceeded' and `Rabserr_exceeded'.
	(cmp_lines): Before calling cmp_fields(), `Labserr_exceeded' and `Rabserr_exceeded'
	are both initialized to zero.
	(cmp_lines): If `Labserr_exceeded' is non-zero after calling cmp_fields(),
	the current line numbers and field numbers are stored in the structure
	`statres->Labserr_location'.
	(cmp_lines): If `Rabserr_exceeded' is non-zero after calling cmp_fields(),
	the current line numbers and field numbers are stored in the structure
	`statres->Rabserr_location'.

	(cmp_lines): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _SE_MASK is on.
	(cmp_lines): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _SU_MASK is on.

	(cmp_lines): Added output instructions to mark corresponding fields as different
	when the output mode is raw.
	(cmp_lines): Added output instruction in raw output mode for the case of
	a line in the second file which is shorter than the corresponding line from the first file.
	(cmp_lines): Added output instruction in raw output mode for the case of
	a line in the first file which is shorter than the corresponding line from the second file.

	(cmp_files): Signature changed: the parameter `argl' is now of type
	`const argslist*' instead of `argslist*', new parameter `statres'
	of type `statlist*'. All callers changed.

	Doc fixes.

	* arith.c: Doc fixes.

	* analyze.c (diff_2_files):
	The last argument is now a pointer to a constant argslist
	since the function does not change the pointed structu

	(diff_2_files): The value of the bit _M_MASK is now retrieved by calling
	getBitAtPosition() on the mask of the command line options.
	(diff_2_files): getBitAtPosition() is now called on the mask of the command line options
	to check if the bit _F_MASK is on.

2016-12-31  Ivano Primi  <ivprimi(at)libero(dot)it>

	* bitvector.c, bitvector.h: New file.

2013-09-15  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Version 5.8.1 released.

	* config.h.in (VERSION): From 5.8.0 to 5.8.1.

	* NEWS: Added news for version 5.8.1.

	* Makefile.in (VERSION): From 5.8.0 to 5.8.1.

2013-08-28  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Version 5.8.0 released.

	* BUGS: Doc fixes.

	* BUGS: Added description of the bug discovered by Elias Pipping
	and a hint on how to avoid it.

2013-08-26  Ivano Primi  <ivprimi(at)libero(dot)it>

	* INSTALL: Doc fixes.

	* BUGS: Added remind: specify if the operating system is 
	either 32- or 64-bit.

	* NEWS: Added news for version 5.8.0.

2013-08-25  Ivano Primi  <ivprimi(at)libero(dot)it>

	* util.c: Added instruction to include linesplit.h
	Added declaration of the external variable def_ifs.
	(lines_differ): ifs and Ifs redefined as const char**.
	(lines_differ): IFS replaced by def_ifs.
	(lines_differ): for cycle to initialize f1 and
	let it point to the first field of s1
	replaced by a call to string_spn().
	(lines_differ): for cycle to initialize f2 and
	let it point to the first field of s2
	replaced by a call to string_spn().
	(lines_differ): Every couple of for cycles to move f1 
	to the beginning of the next field has been replaced
	by a call to string_cspn() and a call to string_spn().
	(lines_differ): Every couple of for cycles to move f2 
	to the beginning of the next field has been replaced
	by a call to string_cspn() and a call to string_spn().
	(lines_differ): for cycle to set e1 and let it point to
	the end of the field pointed to by f1 replaced by a call
	to string_cspn().
	(lines_differ): for cycle to set e2 and let it point to
	the end of the field pointed to by f2 replaced by a call
	to string_cspn().
	(lines_differ): The instructions
	f1 = e1;  f2 = e2;
	have been removed from block of  else if ((f1_is_blurred)) .
	(lines_differ): The instructions
	f1 = e1;  f2 = e2;
	have been removed from `else' block of
	if ( (compare_numeric_strings (f1, pnf, f2, Pnf)) ) .
	(lines_differ): for cycle to move f1 from the end of a 
	field to the beginning of the next field replaced by 
	a call to string_spn().
	(lines_differ): for cycle to move f2 from the end of a 
	field to the beginning of the next field replaced by 
	a call to string_spn().

2013-08-22  Ivano Primi  <ivprimi(at)libero(dot)it>

	* thrlist.c, README: Doc fixes.

	* read_line.c:
	[_TEST_READ_LINE_]: Added instructions to include stdio.h, stdlib.h, and string.h
	[_TEST_READ_LINE_]: New macro constant BUFF_SIZE
	[_TEST_READ_LINE_]: New macro constants for error codes:
	OK, LINE_INTERR, EOF_REACHED, READING_ERROR, OUT_OF_MEMORY, OPEN_FAILED,  
	WRONG_USAGE, FILE_IS_BINARY.
	(read_line): New variables n, ch, exception_occurred.
	(read_line): Cycle   while ((ptr = fgets (buffer, BUFF_SIZE,pf))) { ... }
	replaced by do { ... } while (!exception_occurred); (do not rely anymore
	on function fgets() to read input lines, but use getc()).
	(read_line): Test  if(!ptr)  replaced by  if ((exception_occurred)) .
	(read_line): Added test  else if ( ch == '\0' ) . If the condition is true,
	*errcode is set to FILE_IS_BINARY.
	[_TEST_READ_LINE_] (main): New function.
	Doc fixes.

	* options.c: Added instruction to include linesplit.h
	(print_version): Fixed copyright string.
	(print_help): New help entry for options --delimiters,
	help message for option -s improved.
	(print_help): Since the short option for --dummy is not -D anymore but -U,
	the format strings for a couple of printf() calls have been changed. 
	(return_ifs): function removed.
	(setargs): Changed initialization of optstring.
	(setargs): Since the short option for --dummy is not -D anymore but -U,
	the entry for the option "dummy" in the array long_options has been
	changed.
	(setargs): Since the short option for --dummy is not -D anymore but -U,
	the label of the corresponding case in   switch (optch){...}
	is now 'U' instead of 'D'.
	(setargs): _SD_MASK replaced by _SU_MASK.
	(setargs): Long option "separator" changed to "separators".
	(setargs): Added entry for option "delimiters" to the array long_options.
	(setargs): Instead of using xstrdup(), list->nf1.currency and
	list->nf2.currency are now initialized by means of 
	a call to get_separating_string().
	(setargs): The memory reserved for list->ifs1 and list->ifs2 is now
	freed by calling delete_string_vector() instead of free().
	(setargs): ssplit_former_way() is now used in place of return_ifs().
	(setargs): Added if statements to print a suitable error message and 
	return -1 in case ssplit_former_way() returns NULL (to indicate a failure).
	(setargs): To check for the presence of the newline character
	in list->ifs1 and list->ifs2 the function is_string_in_vector() is used 
	in place of strchr().
	(setargs): Before `adding' _S_MASK to list->optmask,
	the functions remove_duplicates_from_string_vector() and
	sort_string_vector() are called on list->ifs1 and list->ifs2.
	(setargs): Added case D to switch statement.
	(setargs): In case c the function get_separating_string() is now used
	in place of xstrdup() to set list->nf1.currency and list->nf2.currency.
	Doc fixes.

2013-08-18  Ivano Primi  <ivprimi(at)libero(dot)it>

	* numutil.c: Doc fixes.

	* numdiff.h (FILE_IS_BINARY): New macro.
	(argslist): Changed declaration of the fields ifs1 and ifs2.
	(_SD_MASK): Macro removed.
	(_SU_MASK): New macro.
	(IFS): Macro removed.
	Doc fixes.

	* new.c: Doc fixes.

	* ndselect.h (Argslist): Changed declaration of field ifs.
	(Argslist): New field osep.
	New macros ___SD_MASK and ___SO_MASK.
	Redefinition of macros ___X_MASK and ___V_MASK.
	Doc fixes.

	* ndselect.c: Added instruction to include linesplit.h.
	(return_ifs): function removed.
	(print_line): Signature and definition changed. All callers changed.
	(print_line): strspn() and strcspn() replaced by
	string_spn() and string_cspn() respectively.
	(print_line): The setting of the variable stop depends now
	on the value of the variable osep.
	(print_line): If osep is not NULL, it is printed to the standard
	output after every selected field.
	(scan_file): Signature and definition changed. All callers changed.
	(scan_file): Definition of ifs changed.
	(scan_file): IFS replaced by def_ifs.
	(scan_file): calls to print_line() changed.
	(print_selversion): Fixed copyright string.
	(print_selhelp): New help entries for options -D and -O,
	help message for option -S improved.
	(set_args): Changed initialization of optstring.
	(set_args): Added entries for options "delimiters"
	and "output-separator" to the array long_options.
	(set_args): Long option "separator" changed to "separators".
	(set_args): Added initialization code for list->osep.
	(set_args): The memory reserved for list.ifs is now
	freed by calling delete_string_vector() instead of free(),
	and after list->ifs is reinitialized to NULL.
	(set_args): ssplit_former_way() is now used in place of return_ifs().
	(set_args): To check for the presence of the newline character
	in list->ifs the function is_string_in_vector() is used 
	in place of strchr().
	(set_args): Before `adding' ___SS_MASK to list->optmask,
	the functions remove_duplicates_from_string_vector() and
	sort_string_vector() are called on list->ifs.
	(set_args): Added cases D and O to switch statement.
	Added definition of static variable def_ifs.
	(clean_up_memory): New function.
	(main): def_ifs is properly initialized by means of 
	a call to ssplit().
	(main): clean_up_memory() is registered through atexit() to
	be called at process termination. 
	(main): If either the call to atexit() or the 
	initialization of def_ifs fails, the program exits after
	printing a suitable error message.
	(main): Changed call to scan_file().
	Doc fixes.

	* Makefile.in (VERSION): From 5.6.1 to 5.8.0.
	(OBJECTS): Added ./linesplit.o.
	(OBJECTSONE): Added ./linesplit.o.
	(OBJECTSTWO): Added ./linesplit.o.
	(SOURCESONE): Added $(srcdir)/linesplit.c.
	(SOURCESTWO): Added $(srcdir)/linesplit.c.
	(copy): Added commands to copy $(srcdir)/linesplit.c and $(srcdir)/linesplit.h.
	Doc fixes.

	* main.c: Added instruction to include linesplit.h.
	Added definition of the external variable def_ifs.
	(main): def_ifs is properly initialized by calling the function ssplit(),
	added if statement to check for the successful initialization.
	(main): The memory reserved for list.ifs1 and list.ifs2 is now
	freed by calling delete_string_vector() instead of free().
	(main): Before exiting the program, the function delete_string_vector()
	is called to free the memory previously reserved for def_ifs.
	(main): variable test is now initialized to 0 instead of -1.
	(main): If the call to open_files() fails, the memory is cleaned now
	before exiting the program.
	(main): If compare_files() returns a negative value, the program
	now exits after printing a suitable error message.
	(main): Now, if either rewind_files() or set_file_pointers() fails, 
	the memory is cleaned and all files are properly closed 
	before exiting the program.
	Doc fixes.

	* io.c, INSTALL: Doc fixes.

	* inout.c: Added instruction to include linesplit.h.
	(find_and_hash_each_line): Signature and definition changed, all callers changed.
	(find_and_hash_each_line): for cycle to initialize p and
	let it point to the first field replaced by a call to string_spn().
	(find_and_hash_each_line): for cycle to initialize eof 
	replaced by a call to string_cspn().
	(find_and_hash_each_line): for cycle to move p to the
	beginning of the next field replaced by a call to string_spn().
	Added declaration of the external variable def_ifs.
	(read_files): ifs1 and ifs2 redefined as char**.
	(read_files): IFS replaced by def_ifs.
	(read_files): call to find_and_hash_each_line() changed.
	Doc fixes.

	* flags.c, errors.c: Doc fixes.

	* configure.ac: AC_INIT(...): From version 5.6 to 5.8.
	Doc fixes.

	* config.h.in (VERSION): From 5.6.1 to 5.8.0.
	Doc fixes.

	* cmpfns.c: Added instruction to include linesplit.h.
	(cmp_lines): Signature and definition changed. All callers changed.
	(cmp_lines): New local variables end_field1, end_field2.
	(cmp_lines): strspn() and strcspn() replaced by 
	string_spn() and string_cspn(), respectively.
	(cmp_lines): _SD_MASK replaced by _SU_MASK.
	Added declaration of the external variable def_ifs.
	(cmp_files): ifs1 and ifs2 redefined as char**.
	(cmp_files): IFS replaced by def_ifs.
	(cmp_files): Changed calls to cmp_lines().
	(cmp_files): The if condition catching any error occurred 
	while comparing corresponding lines has been extended:
	the error FILE_IS_BINARY is also caught now.
	(cmp_files): A suitable error message is printed if one
	of the two compared files is binary.
	(cmp_files): Message for reading error fixed.
	(cmp_files): Format of error message fixed.
	Doc fixes.

	* AUTHORS, arith.c: Doc fixes.

	* analyze.c (diff_2_files): The instruction which sets the value of 
	the variable changes has been modified to ensure 
	that the returned value is either 0 or 1.

2013-07-11  Ivano Primi  <ivprimi(at)libero(dot)it>

	* linesplit.h, linesplit.c: New file.

2012-02-22  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Version 5.6.1 released.

	* config.h.in (VERSION): From 5.6.0 to 5.6.1.

	* Makefile.in: VERSION changed to 5.6.1.

	* NEWS: Added news for version 5.6.1.

	* Makefile.in (installdirs): Added  $(MKDIR) $(DESTDIR)$(MANDIR).

2012-02-12  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Version 5.6.0 released.

	* side.c (display_half_line):
	label control_char replaced by control_character.

2012-02-05  Ivano Primi  <ivprimi(at)libero(dot)it>

	* NEWS: Dox fixes.

	* main.c (compare_files):
	Newline not any more printed, since it makes the report unclear.

	* inout.c (_DEBUG_HASHING_): New Macro.
	_DEBUG_ has been replaced by  _DEBUG_HASHING_.
	(find_and_hash_each_line): Fixed improper handling of a file whose last line
	does not have a trailing newline (bucket[-1] no longer used).
	(find_and_hash_each_line): Bug fix imported from GNU Diffutils 3.0.
	(find_and_hash_each_line)[_DEBUG_HASHING_]: Added code for debug.
	(find_identical_ends): Bug fix imported from GNU Diffutils 3.0.

	* flags.c:
	(notedown_sdiff_script)[_DEBUG_FLAGSTABLE_]: New debug instruction.

	* cmpfns.c (cmp_files):
	Fixed improper handling of files whose last line
	does not have a trailing newline in case filter is on.

	* numdiff.h (_DEBUG_HASHING_): New Macro.
	_DEBUG_ has been replaced by  _DEBUG_HASHING_.

	* options.c (print_help): two help entries fixed.

2012-01-05  Ivano Primi  <ivprimi(at)libero(dot)it>

	* ndselect.c (print_selhelp): Several fixes to help entries.

	* options.c (print_help): Several fixes to help entries.

	* cmpfns.c (cmp_lines):
	New constant fieldno_upper_limit, set to 8*FIELDMASK_SIZE.
	(cmp_lines): Constant value 8*FIELDMASK_SIZE replaced everywhere
	by fieldno_upper_limit.

2012-01-03  Ivano Primi  <ivprimi(at)libero(dot)it>

	* NEWS: Doc fixes.

	* ndselect.c (print_line): Signature changed. All callers changed.
	(print_line): Added if-else statement based on the value of
	the variable omit_if_empty.
	(scan_file): New variable omit_empty_lines, added
	initialization code.
	(print_selhelp): New help entry for option `-x',
	help message improved.
	(set_args): Changed initialization of optstring.
	(set_args): Added entry for option "omit-empty-lines" to the array long_options.
	(set_args): Added case 'x' to switch statement.

	* ndselect.h (___X_MASK): New macro.
	(___V_MASK): The value of this macro has been changed.

2012-01-02  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Makefile.in (MANFILETWO): changed description of the manpage.

	* NEWS: Doc fixes.

	* options.c (print_help):
	New help entry for option -F, other help messages improved.
	(setargs): Changed initialization of optstring.
	(setargs): Added entry for option "formula" to the array long_options.
	(setargs): Added case 'F' to switch statement.
	(setargs): Removed initial if-else if-else statement from case 'r',
	replaced by a single call to thrlist_add.
	(setargs): Parentheses have been written around operator &.

	* numdiff.h: Doc fixes.

	* ndselect.h (Argslist):
	New fields first_field, last_field, increment, and ifs.
	(___SF_MASK ___SL_MASK ___SI_MASK ___SS_MASK): New macros.
	(___V_MASK): The value of this macro has been changed.

	Doc fixes.

	* ndselect.c (return_ifs): New function, copied from options.c.
	(we_can_go_on): New function.
	(print_line): New function.
	(scan_file): New variable ifs, then added initialization code for ifs.
	(scan_file): call to fputs replaced by call to print_line (done twice).
	(print_selhelp): New help entries for options -F, -L, -I and -S,
	other help messages improved.
	(set_args): Changed initialization of optstring.
	(set_args): Added entries for "first-field", "last-field", "increment" and
	"separator" options to the array long_options.
	(set_args): Added initialization code for list->first_field, list->last_field,
	list->increment and list->ifs.
	(set_args): Added cases F, L, I and S to switch statement.

	Doc fixes.

2011-12-31  Ivano Primi  <ivprimi(at)libero(dot)it>

	* util.c (lines_differ):
	New constant fieldno_upper_limit, set to 8*FIELDMASK_SIZE.
	(lines_differ): 8*FIELDMASK_SIZE replaced by fieldno_upper_limit everywhere.
	(lines_differ): Error message "Line \"%s\"\ncontains too many fields!\n"
	replaced by a clearer explanation, which is sent to stderr through fprintf.

	* thrlist.c (defaults): Added field CURRENCY.
	(thrlist_new): list->beg1, list->beg2, and list->end1, list->end2
	are initialized now with 0 and FIELDNO_MAX - 1 respectively.
	(thrlist_new): list->double_range_spec is set to zero.
	(set_interval): *b and *e are set now to beg-1 and end-1 respectively.
	(set_intervals): Signature has been changed. All callers changed.
	(set_intervals): Added code to set the variable pointed to by dbl_rng_spec.
	(thrlist_add): New variable dbl_rng_spec.
	(thrlist_add): beg1, beg2, and end1, end2 are initialized
	now with 0 and FIELDNO_MAX - 1 respectively.
	(thrlist_add): pnode->double_range_spec set to dbl_rng_spec.
	(thrlist_cmp): The value returned by this function depends now also on the value
	of pnode->double_range_spec.

	Doc fixes.

	* options.c (print_version): Copyright statement updated.
	(print_help): Help strings have been updated or improved.
	New help entries for options `-c' and `-B'.
	Added instruction to display the default value of the currency name.
	(VALID_NUMFMT INVALID_NUMFMT INVALID_CURRENCY): New macros.
	(valid_numfmt): Name changed to is_numfmt_valid. All callers changed.
	(valid_numfmt): New variable ptr.
	(valid_numfmt): Macros VALID_NUMFMT, INVALID_NUMFMT and INVALID_CURRENCY are used
	in the 'return' statements in place of hardcoded integer values.
	(valid_numfmt): Added code to check the validity of the string pointed to by
	pnf->currency.
	(setargs): New constant mask_size, defined as FIELDMASK_SIZE*8.
	(setargs): modified string pointed to by optstring.
	(setargs): Added entries for "binary" and "currency" options to the array long_options.
	(setargs): New variables binary, rv and file_id.
	(setargs): Removed variable defaults.
	(setargs): Added initialization of variable binary.
	(setargs): Added initialization of list->nf*.currency.
	(setargs): Added cases 'B' and 'c' to switch statement.
	(setargs): FIELDMASK_SIZE*8 replaced by mask_size everywhere.
	(setargs)[USE_GMP]: Removed call to delR(), removed directive (done twice).
	(setargs): thrlist_add is used in place of str2R to add new elements to
	list->maxabserr and list->maxrelerr. Error handling consequently updated.
	(setargs): tests "if (!valid_numfmt(&list->nf*) )" replaced by
	"if ( (rv = is_numfmt_valid(&list->nf*)) == INVALID_NUMFMT )"
	(setargs): Added code to handle the cases when is_numfmt_valid returns INVALID_CURRENCY.

	Doc fixes.

	* numutil.c (anum):
	 New variable length, used to store the length of the string pnf->currency.
	Added code to skip the currency name, if specified.
	(snum):  New variable length, used to store the length of the string pnf->currency.
	Added code to skip the currency name, if specified.

	Doc fixes.

	* numdiff.h (currency): New variable.
	(maxabserr maxrelerr): Variable type has been changed.
	(CURRENCY): New macro.
	(binary): New variable.

	Doc fixes.

	* new.c (bc_a2num): New variable length, used to store
	the length of the string pnf->currency. Added
	code to skip the currency name, if specified.

	Doc fixes.

	* ndselect.c (print_selversion): Copyright statement updated.
	Doc fixes.

	* Makefile.in: VERSION set to 5.6.0.
	(mandir MANDIR HELP2MAN MANFILE MANFILETWO): New variables.
	(OBJECTSTWO): Added ./getopt1.o.
	(SOURCESTWO): Added $(srcdir)/getopt1.c.
	(man $(MANFILE) $(MANFILETWO)): New targets
	for creation of manpages.
	(install): Added installation of manpages.
	(uninstall): Added removal of files
	$(PACKAGE).1 and $(PACKAGETWO).1, i.e.
	removal of numdiff and ndselect manpages.
	(maintainer-clean): Added cleaning instructions for
	$(MANFILE) and $(MANFILETWO).
	(copy): Added instructions to copy $(MANFILE)
	and (MANFILETWO) from docs directory to tarball directory.

	* main.c (init_mpa_support): list->maxabserr and
	list->maxrelerr are now initialized through
	a call to thrlist_new(), instead of using initR().
	(dismiss_mpa_support): list->maxabserr and
	list->maxrelerr are now disposed through a call
	to thrlist_dispose(), instead of using delR().
	(main): variable defaults removed.
	Doc fixes.

	* configure.ac: AC_INIT(...): From version 5.2 to 5.6.

	* NEWS: Added news for version 5.6.0.

2011-12-30  Ivano Primi  <ivprimi(at)libero(dot)it>

	* README, read_line.c, ndselect.h, io.c, INSTALL: Doc fixes.

	* inout.c (find_and_hash_each_line): New constant fieldno_upper_limit,
	set to FIELDMASK_SIZE*8.
	(find_and_hash_each_line): Added test "fieldno < fieldno_upper_limit" to for cycle.
	(find_and_hash_each_line): Added error handling in case
	fieldno >= fieldno_upper_limit.

	* flags.c, errors.c: Doc fixes.

	* configure.ac:
	AC_CHECK_LIB(gmp, __gmpz_init): Do not search for the GMP library
	if its use has been turned off through --disable-gmp or
	--enable-gmp=no.
	AC_CHECK_LIB(intl, setlocale): If the support for NLS is on, search
	for the function setlocale in libintl (this fixes building bug
	under Cygwin).
	Doc fixes.

	* config.h.in: VERSION changed to 5.6.0.
	Doc fixes.

	* cmpfns.c (cmp_fields): Signature changed. All callers changed.
	(cmp_fields): Calls to cmp replaced by calls to thrlist_cmp.
	(cmp_lines): Error message "@ Line %lu in file \"%s\" contains too many fields!\n" replaced by a clearer message.
	(cmp_files): Error message "\n***  End of file \"%s\" reached while trying to read line %lu.\n" replaced by clearer message.
	Doc fixes.

	* AUTHORS, arith.c: Doc fixes.

2011-10-30  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Makefile.in (OBJECTS OBJECTSONE): Added ./thrlist.o.
	(SOURCESONE): Added source $(srcdir)/thrlist.c.
	(copy): Added instruction to copy thrlist.c
	from source directory to tarball directory.

	* numdiff.h (THRLIST_OK THRLIST_INVALID_FORMAT THRLIST_INVALID_RANGES):
	New macros.
	(__thrlist_node): New struct.
	(thrlist_node): Alias for __thrlist_node.
	(thrlist): Alias for thrlist_node*.
	(thrlist_new thrlist_add thrlist_cmp thrlist_dispose): Added declarations.

	* thrlist.c: New file.

2011-10-01  Ivano Primi  <ivprimi(at)libero(dot)it>

	* side.c (display_half_line): New function.
	(print_1overview_line): New function.

	* options.c (print_help): New help entry for option -O.
	(setargs): modified string pointed to by optstring.
	(setargs): Added entry for "overview" option to the array long_options.
	(setargs): Added case O to switch statement.
	(setargs): Added code to initialize list->output_mode to OUTMODE_OVERVIEW.

	* numdiff.h (_SO_MASK): New macro for option -O.
	(_SS_MASK _SI_MASK _SH_MASK _M_MASK _V_MASK): The values of these macros have been changed.
	(OUTMODE_OVERVIEW): New macro.
	(print_1overview_line): Added declaration.

	Doc fixes.

	* Makefile.in: VERSION changed to 5.3.0.

	* config.h.in: VERSION set to 5.3.0.

	* cmpfns.c (cmp_files):
	Addition of code for the implementation of the overview mode,
	i.e. added calls to the function print_1overview_line. In case the compared
	files are equal, print_1overview_line is called only if suppress_common_lines
	is false (0).

2010-01-24  Ivano Primi  <ivprimi(at)libero(dot)it>

	Version 5.2.1 released.

2010-01-24  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Makefile.in: VERSION changed to 5.2.1.

	* config.h.in (VERSION): From 5.2.0 to 5.2.1.

	* NEWS: Added news for version 5.2.1.

	* system.h: [!ENABLE_NLS] (ngettext): Macro definition.


2010-01-07  Ivano Primi  <ivprimi(at)libero(dot)it>

	Version 5.2.0 released.

2010-01-07  Ivano Primi  <ivprimi(at)libero(dot)it>

	* util.c: Doc fixes.

	* util.c: New file.

	* side.c: Doc fixes.

	* side.c: New file.

	* inout.c: Doc fixes.

	* inout.c: New file.

	* analyze.c: Doc fixes.

	* analyze.c: New file.

	* number.c: Doc fixes.

	* options.c: (print_version) [!USE_GMP]: Message string fixed.
	(print_help): Message string fixed.

2010-01-06  Ivano Primi  <ivprimi(at)libero(dot)it>

	* NEWS, INSTALL: Doc fixes.

2010-01-05  Ivano Primi  <ivprimi(at)libero(dot)it>

	* ndselect.c (print_selversion): Fixed Copyright string.

	* read_line.c: Doc fixes.

	* options.c: Doc fixes.

	(print_version): Fixed Copyright string.

	* numutil.c, numdiff.h, number.c: Doc fixes.

	* number.c: New file.

	* new.c, ndselect.h: Doc fixes.

	* ndselect.h: New file.

	* ndselect.c, main.c, io.c, flags.c: Doc fixes.

	* flags.c: New file.

	* errors.c, configure.ac, config.h.in, cmpfns.c, arith.c, README:
	Doc fixes.

	* README: New file.

	* Makefile.in, INSTALL: Doc fixes.

	* INSTALL, BUGS: New file.

	* AUTHORS: Doc fixes.

	* AUTHORS: New file.

2010-01-03  Ivano Primi  <ivprimi(at)libero(dot)it>

	* ndselect.c: [USE_GMP]: Removed zalloc.
	string.h and numutil.c are not anymore included.

	Removed declaration of read_line.
	Include read_line.c.

	* Makefile.in (SOURCESONE): Added $(srcdir)/read_line.c.
	(OBJECTSTWO): Removed ./arith.o and ./io.o.
	(SOURCESTWO): Removed $(srcdir)/arith.c and $(srcdir)/io.c.
	Added $(srcdir)/read_line.c.
	(copy): Added instruction to copy read_line.c
	from source directory to tarball directory.

	* io.c: Doc-fixes: Removed unuseful comments.
	(read_line): Moved to file read_line.c.
	Added instruction to include read_line.c.

	* read_line.c, io.c: New file.

	* arith.c: [USE_GMP] (str2C): Replaced isspace by is_space.
	Replaced '+' by POS_SIGN and '-' by NEG_SIGN.
	[!USE_GMP] (str2C): Replaced isspace by is_space.
	Replaced '+' by POS_SIGN and '-' by NEG_SIGN.

	* ndselect.c (setargs): Replaced isspace by is_space.

	* numdiff.h (is_digit, is_punct, is_print): Macro re-definition.
	(is_space): Macro definition. The macro isspace has been
	replaced everywhere by is_space.

	* system.h: New file.

	* numutil.c (anum, snum): Replaced toupper by TOLOWER.
	(anum, acxnum, snum, scxnum): Replaced isspace by is_space.

	* cmpfns.c (strNcasecmp): Replaced tolower by TOLOWER.

	* new.c (bc_a2num): Replaced toupper by TOLOWER.
	Replaced isspace by is_space.

	* new.c: New file.

2009-12-30  Ivano Primi  <ivprimi(at)libero(dot)it>

	* NEWS: Added news for version 5.2.0.

	* NEWS: New file.

	* configure.ac: New option --enable-gmp / --disable-gmp.
	Usage of GNU MP is enabled by default.

	* arith.c: HAVE_LIBGMP has been replaced by USE_GMP.
	(Epsilon, MEpsilon): Removed.
	(mpa_define_epsilon, mpa_undef_epsilon): Removed.
	[USE_GMP] (init_mpa): Signature and definition (argument
	iscale is used in place of MAX_ISCALE) changed.
	All callers in other files changed.
	[!USE_GMP] (init_mpa): Signature changed.
	All callers in other files changed.
	(copyR, copyC): Signature and definition changed.
	All callers in other files changed.
	[USE_GMP] (str2R, str2C): Calls to mpf_a2num() changed.
	(cmp, is0): Signature and definition changed.
	All callers in other files changed.
	[USE_GMP] (fprintno): Test (u == Inf) has been correctly rewritten.
	[USE_GMP] (end_mpa): Variable Inf is also cleared now.

	* main.c (init_mpa_support): Call to init_mpa() changed.
	(print_statistics) [USE_GMP]: Added code to initialize qm_abserr and qm_relerr.
	(print_statistics): Removed commented out old code.
	(print_statistics): Changed calls to copyR().
	(main): Removed calls to mpa_define_epsilon() and mpa_undef_epsilon().

	* ndselect.c: [USE_GMP] (zalloc): New function.
	[USE_GMP]: Include numutil.c.

	* options.c:
	(print_version) [USE_GMP]: Added statement on the way the program has been built.
	(print_version) [!USE_GMP]: Modified statement on the way the program has been built.
	(set_args) [!USE_GMP]: Removed code to avoid memory leak (not needed in this case
	and even dangerous).

	* errors.c (out_of_memory):
	Added missing argument in the call to fprintf().

	* numutil.c: HAVE_LIBGMP has been replaced by USE_GMP.
	[USE_GMP](mpf_a2num): The case when the number returned by snum()
	is zero is now correctly handled.

	* cmpfns.c (cmp, is0, copyR): Calls changed.

	* numdiff.h (USE_GMP): New Macro.
	HAVE_LIBGMP has been replaced by USE_GMP.
	(MAX_EPXN, MIN_EXPN): They are now constant values of 'long int' type.
	(cmp, is0, init_mpa, copyR, copyC): Redefinition of signature.
	All callers changed.
	(mpa_define_epsilon, mpa_undef_epsilon): Removed.

	* errors.c, options.c, ndselect.c, main.c, cmpfns.c: New file.

2009-12-29  Ivano Primi  <ivprimi(at)libero(dot)it>

	* configure.ac: AC_INIT(...): From version 5.0 to 5.2.

	* config.h.in (HAVE_LIBGMP): New Macro.
	(HAVE_LOCALECONV): New Macro.
	(VERSION): From 5.0.0 to 5.2.0.

	* Makefile.in: VERSION changed to 5.2.0.

	* config.h.in: New file.

	* numutil.c:
	[HAVE_LIBGMP] (mpf_a2num): Bug fixes after running a text program.

	* numutil.c:
	[HAVE_LIBGMP] (mpf_a2num): Removed memory leak + Doc fixes.

	* arith.c: [HAVE_LIBGMP] (fprintno): Memory leak removed

2009-12-28  Ivano Primi  <ivprimi(at)libero(dot)it>

	* numutil.c: [HAVE_LOCALECONV && HAVE_LIBGMP]: Include locale.h.
	[HAVE_LIBGMP] (mpf_a2num): New function.

	* numutil.c: New file.

	* configure.ac: AC_CHECK_FUNCS(...): Check for localeconv added.

	* numdiff.h (CHAR_ONE CHAR_NINE): Macro definition.
	[HAVE_LIBGMP] (mpf_a2num): Declaration.

	* arith.c: [HAVE_LIBGMP] (round_far_from_zero fprintno): New functions.
	[HAVE_LIBGMP] (printno, debug_printno): Transformed into wrappers of the function fprintno.
	[HAVE_LIBGMP] (str2R): Call to mpf_a2num changed in view of the actual definition of this function.

	* arith.c:
	[HAVE_LIBGMP] (Zero, Ten, Inf, Epsilon, MEpsilon): Definition of variables.
	[HAVE_LIBGMP] (init_mpa, mpa_define_epsilon, initR, initC, copyR, copyC)
	(str2R, str2C, add, square, divide, divide_by_int, square_root)
	(Cabs, Csub, cmp, is0, smart_cmp, printno, debug_printno)
	(delR, delC, mpa_undef_epsilon, end_mpa): New functions.
	[!HAVE_LIBGMP] (copyR, copyC): Re-definition according to the new signature.

	* numdiff.h (copyR copyC): Redefinition of signature.
	All callers changed.

2009-12-13  Ivano Primi  <ivprimi(at)libero(dot)it>

	* Makefile.in: Added createdirs, copy and tarball targets.
	Target dist rewritten.

	* Makefile.in, arith.c: New file.

2009-12-12  Ivano Primi  <ivprimi(at)libero(dot)it>

	* numdiff.h: [HAVE_LIBGMP] (Real Complex): Definition of types.

	* numdiff.h: New file.

	* configure.ac: AC_CHECK_LIB(gmp, __gmpz_init): Check for GNUMP added.

	* configure.ac: New file.

2009-11-31  Ivano Primi  <ivprimi(at)libero(dot)it>

	Version 5.0.0 released.