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70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* Interface header file for GNU DIFF library.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of GNU DIFF.
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GNU DIFF is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU DIFF is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#ifndef DIFFRUN_H
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#define DIFFRUN_H
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/* This header file defines the interfaces used by the diff library.
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It should be included by programs which use the diff library. */
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#include <sys/types.h>
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#if defined __STDC__ && __STDC__
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#define DIFFPARAMS(args) args
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#else
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#define DIFFPARAMS(args) ()
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#endif
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/* The diff_callbacks structure is used to handle callbacks from the
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diff library. All output goes through these callbacks. When a
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pointer to this structure is passed in, it may be NULL. Also, any
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of the individual callbacks may be NULL. This means that the
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default action should be taken. */
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struct diff_callbacks
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{
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/* Write output. This function just writes a string of a given
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length to the output file. The default is to fwrite to OUTFILE.
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If this callback is defined, flush_output must also be defined.
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If the length is zero, output zero bytes. */
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void (*write_output) DIFFPARAMS((char const *, size_t));
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/* Flush output. The default is to fflush OUTFILE. If this
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callback is defined, write_output must also be defined. */
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void (*flush_output) DIFFPARAMS((void));
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/* Write a '\0'-terminated string to stdout.
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This is called for version and help messages. */
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void (*write_stdout) DIFFPARAMS((char const *));
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/* Print an error message. The first argument is a printf format,
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and the next two are parameters. The default is to print a
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message on stderr. */
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void (*error) DIFFPARAMS((char const *, char const *, char const *));
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};
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/* Run a diff. */
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extern int diff_run DIFFPARAMS((int, char **, char *,
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const struct diff_callbacks *));
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/* Run a diff3. */
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extern int diff3_run DIFFPARAMS((int, char **, char *,
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const struct diff_callbacks *));
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#undef DIFFPARAMS
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#endif /* DIFFRUN_H */
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