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diff --git a/gnu/dist/diffutils/src/diff.h b/gnu/dist/diffutils/src/diff.h
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-/* $NetBSD: diff.h,v 1.1.1.1 2003/01/26 00:43:16 wiz Exp $ */
-
-/* Shared definitions for GNU DIFF
-
- Copyright (C) 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1998, 2001,
- 2002 Free Software Foundation, Inc.
-
- This file is part of GNU DIFF.
-
- GNU DIFF is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU DIFF is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING.
- If not, write to the Free Software Foundation,
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "system.h"
-#include <stdio.h>
-
-#define TAB_WIDTH 8
-
-/* What kind of changes a hunk contains. */
-enum changes
-{
- /* No changes: lines common to both files. */
- UNCHANGED,
-
- /* Deletes only: lines taken from just the first file. */
- OLD,
-
- /* Inserts only: lines taken from just the second file. */
- NEW,
-
- /* Both deletes and inserts: a hunk containing both old and new lines. */
- CHANGED
-};
-
-/* Variables for command line options */
-
-#ifndef GDIFF_MAIN
-# define XTERN extern
-#else
-# define XTERN
-#endif
-
-enum output_style
-{
- /* No output style specified. */
- OUTPUT_UNSPECIFIED,
-
- /* Default output style. */
- OUTPUT_NORMAL,
-
- /* Output the differences with lines of context before and after (-c). */
- OUTPUT_CONTEXT,
-
- /* Output the differences in a unified context diff format (-u). */
- OUTPUT_UNIFIED,
-
- /* Output the differences as commands suitable for `ed' (-e). */
- OUTPUT_ED,
-
- /* Output the diff as a forward ed script (-f). */
- OUTPUT_FORWARD_ED,
-
- /* Like -f, but output a count of changed lines in each "command" (-n). */
- OUTPUT_RCS,
-
- /* Output merged #ifdef'd file (-D). */
- OUTPUT_IFDEF,
-
- /* Output sdiff style (-y). */
- OUTPUT_SDIFF
-};
-
-/* True for output styles that are robust,
- i.e. can handle a file that ends in a non-newline. */
-#define ROBUST_OUTPUT_STYLE(S) ((S) != OUTPUT_ED && (S) != OUTPUT_FORWARD_ED)
-
-XTERN enum output_style output_style;
-
-/* Nonzero if output cannot be generated for identical files. */
-XTERN bool no_diff_means_no_output;
-
-/* Number of lines of context to show in each set of diffs.
- This is zero when context is not to be shown. */
-XTERN lin context;
-
-/* Consider all files as text files (-a).
- Don't interpret codes over 0177 as implying a "binary file". */
-XTERN bool text;
-
-/* Number of lines to keep in identical prefix and suffix. */
-XTERN lin horizon_lines;
-
-/* The significance of white space during comparisons. */
-XTERN enum
-{
- /* All white space is significant (the default). */
- IGNORE_NO_WHITE_SPACE,
-
- /* Ignore changes due to tab expansion (-E). */
- IGNORE_TAB_EXPANSION,
-
- /* Ignore changes in horizontal white space (-b). */
- IGNORE_SPACE_CHANGE,
-
- /* Ignore all horizontal white space (-w). */
- IGNORE_ALL_SPACE
-} ignore_white_space;
-
-/* Ignore changes that affect only blank lines (-B). */
-XTERN bool ignore_blank_lines;
-
-/* Files can be compared byte-by-byte, as if they were binary.
- This depends on various options. */
-XTERN bool files_can_be_treated_as_binary;
-
-/* Ignore differences in case of letters (-i). */
-XTERN bool ignore_case;
-
-/* Ignore differences in case of letters in file names. */
-XTERN bool ignore_file_name_case;
-
-/* File labels for `-c' output headers (--label). */
-XTERN char *file_label[2];
-
-/* Regexp to identify function-header lines (-F). */
-XTERN struct re_pattern_buffer function_regexp;
-
-/* Ignore changes that affect only lines matching this regexp (-I). */
-XTERN struct re_pattern_buffer ignore_regexp;
-
-/* Say only whether files differ, not how (-q). */
-XTERN bool brief;
-
-/* Expand tabs in the output so the text lines up properly
- despite the characters added to the front of each line (-t). */
-XTERN bool expand_tabs;
-
-/* Use a tab in the output, rather than a space, before the text of an
- input line, so as to keep the proper alignment in the input line
- without changing the characters in it (-T). */
-XTERN bool initial_tab;
-
-/* Remove trailing carriage returns from input. */
-XTERN bool strip_trailing_cr;
-
-/* In directory comparison, specify file to start with (-S).
- This is used for resuming an aborted comparison.
- All file names less than this name are ignored. */
-XTERN char const *starting_file;
-
-/* Pipe each file's output through pr (-l). */
-XTERN bool paginate;
-
-/* Line group formats for unchanged, old, new, and changed groups. */
-XTERN char const *group_format[CHANGED + 1];
-
-/* Line formats for unchanged, old, and new lines. */
-XTERN char const *line_format[NEW + 1];
-
-/* If using OUTPUT_SDIFF print extra information to help the sdiff filter. */
-XTERN bool sdiff_merge_assist;
-
-/* Tell OUTPUT_SDIFF to show only the left version of common lines. */
-XTERN bool left_column;
-
-/* Tell OUTPUT_SDIFF to not show common lines. */
-XTERN bool suppress_common_lines;
-
-/* The half line width and column 2 offset for OUTPUT_SDIFF. */
-XTERN unsigned int sdiff_half_width;
-XTERN unsigned int sdiff_column2_offset;
-
-/* String containing all the command options diff received,
- with spaces between and at the beginning but none at the end.
- If there were no options given, this string is empty. */
-XTERN char *switch_string;
-
-/* Use heuristics for better speed with large files with a small
- density of changes. */
-XTERN bool speed_large_files;
-
-/* Patterns that match file names to be excluded. */
-XTERN struct exclude *excluded;
-
-/* Don't discard lines. This makes things slower (sometimes much
- slower) but will find a guaranteed minimal set of changes. */
-XTERN bool minimal;
-
-/* Name of program the user invoked (for error messages). */
-XTERN char *program_name;
-
-/* The strftime format to use for time strings. */
-XTERN char const *time_format;
-
-/* The result of comparison is an "edit script": a chain of `struct change'.
- Each `struct change' represents one place where some lines are deleted
- and some are inserted.
-
- LINE0 and LINE1 are the first affected lines in the two files (origin 0).
- DELETED is the number of lines deleted here from file 0.
- INSERTED is the number of lines inserted here in file 1.
-
- If DELETED is 0 then LINE0 is the number of the line before
- which the insertion was done; vice versa for INSERTED and LINE1. */
-
-struct change
-{
- struct change *link; /* Previous or next edit command */
- lin inserted; /* # lines of file 1 changed here. */
- lin deleted; /* # lines of file 0 changed here. */
- lin line0; /* Line number of 1st deleted line. */
- lin line1; /* Line number of 1st inserted line. */
- bool ignore; /* Flag used in context.c. */
-};
-
-/* Structures that describe the input files. */
-
-/* Data on one input file being compared. */
-
-struct file_data {
- int desc; /* File descriptor */
- char const *name; /* File name */
- struct stat stat; /* File status */
-
- /* Buffer in which text of file is read. */
- word *buffer;
-
- /* Allocated size of buffer, in bytes. Always a multiple of
- sizeof *buffer. */
- size_t bufsize;
-
- /* Number of valid bytes now in the buffer. */
- size_t buffered;
-
- /* Array of pointers to lines in the file. */
- char const **linbuf;
-
- /* linbuf_base <= buffered_lines <= valid_lines <= alloc_lines.
- linebuf[linbuf_base ... buffered_lines - 1] are possibly differing.
- linebuf[linbuf_base ... valid_lines - 1] contain valid data.
- linebuf[linbuf_base ... alloc_lines - 1] are allocated. */
- lin linbuf_base, buffered_lines, valid_lines, alloc_lines;
-
- /* Pointer to end of prefix of this file to ignore when hashing. */
- char const *prefix_end;
-
- /* Count of lines in the prefix.
- There are this many lines in the file before linbuf[0]. */
- lin prefix_lines;
-
- /* Pointer to start of suffix of this file to ignore when hashing. */
- char const *suffix_begin;
-
- /* Vector, indexed by line number, containing an equivalence code for
- each line. It is this vector that is actually compared with that
- of another file to generate differences. */
- lin *equivs;
-
- /* Vector, like the previous one except that
- the elements for discarded lines have been squeezed out. */
- lin *undiscarded;
-
- /* Vector mapping virtual line numbers (not counting discarded lines)
- to real ones (counting those lines). Both are origin-0. */
- lin *realindexes;
-
- /* Total number of nondiscarded lines. */
- lin nondiscarded_lines;
-
- /* Vector, indexed by real origin-0 line number,
- containing TRUE for a line that is an insertion or a deletion.
- The results of comparison are stored here. */
- bool *changed;
-
- /* 1 if file ends in a line with no final newline. */
- bool missing_newline;
-
- /* 1 if at end of file. */
- bool eof;
-
- /* 1 more than the maximum equivalence value used for this or its
- sibling file. */
- lin equiv_max;
-};
-
-/* The file buffer, considered as an array of bytes rather than
- as an array of words. */
-#define FILE_BUFFER(f) ((char *) (f)->buffer)
-
-/* Data on two input files being compared. */
-
-struct comparison
- {
- struct file_data file[2];
- struct comparison const *parent; /* parent, if a recursive comparison */
- };
-
-/* Describe the two files currently being compared. */
-
-XTERN struct file_data files[2];
-
-/* Stdio stream to output diffs to. */
-
-XTERN FILE *outfile;
-
-/* Declare various functions. */
-
-/* analyze.c */
-int diff_2_files (struct comparison *);
-
-/* context.c */
-void print_context_header (struct file_data[], bool);
-void print_context_script (struct change *, bool);
-
-/* dir.c */
-int diff_dirs (struct comparison const *, int (*) (struct comparison const *, char const *, char const *));
-
-/* ed.c */
-void print_ed_script (struct change *);
-void pr_forward_ed_script (struct change *);
-
-/* ifdef.c */
-void print_ifdef_script (struct change *);
-
-/* io.c */
-void file_block_read (struct file_data *, size_t);
-bool read_files (struct file_data[], bool);
-
-/* normal.c */
-void print_normal_script (struct change *);
-
-/* rcs.c */
-void print_rcs_script (struct change *);
-
-/* side.c */
-void print_sdiff_script (struct change *);
-
-/* util.c */
-extern char const change_letter[4];
-extern char const pr_program[];
-char *concat (char const *, char const *, char const *);
-char *dir_file_pathname (char const *, char const *);
-bool lines_differ (char const *, char const *);
-lin translate_line_number (struct file_data const *, lin);
-struct change *find_change (struct change *);
-struct change *find_reverse_change (struct change *);
-void *zalloc (size_t);
-enum changes analyze_hunk (struct change *, lin *, lin *, lin *, lin *);
-void begin_output (void);
-void debug_script (struct change *);
-void fatal (char const *) __attribute__((noreturn));
-void finish_output (void);
-void message (char const *, char const *, char const *);
-void message5 (char const *, char const *, char const *, char const *, char const *);
-void output_1_line (char const *, char const *, char const *, char const *);
-void perror_with_name (char const *);
-void pfatal_with_name (char const *) __attribute__((noreturn));
-void print_1_line (char const *, char const * const *);
-void print_message_queue (void);
-void print_number_range (char, struct file_data *, lin, lin);
-void print_script (struct change *, struct change * (*) (struct change *), void (*) (struct change *));
-void setup_output (char const *, char const *, bool);
-void translate_range (struct file_data const *, lin, lin, long *, long *);
-
-/* version.c */
-extern char const version_string[];