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+/* $OpenBSD: common.h,v 1.30 2019/12/02 22:17:32 jca Exp $ */
+
+/*
+ * patch - a program to apply diffs to original files
+ *
+ * Copyright 1986, Larry Wall
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following condition is met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this condition and the following disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * -C option added in 1998, original code by Marc Espie, based on FreeBSD
+ * behaviour
+ */
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <stdbool.h>
+
+#define DEBUGGING
+
+/* constants */
+
+#define MAXHUNKSIZE 100000 /* is this enough lines? */
+#define INITHUNKMAX 125 /* initial dynamic allocation size */
+#define INITLINELEN 8192
+#define BUFFERSIZE 1024
+#define LINENUM_MAX LONG_MAX
+
+#define ORIGEXT ".orig"
+#define REJEXT ".rej"
+
+/* handy definitions */
+
+#define strNE(s1,s2) (strcmp(s1, s2))
+#define strEQ(s1,s2) (!strcmp(s1, s2))
+#define strnNE(s1,s2,l) (strncmp(s1, s2, l))
+#define strnEQ(s1,s2,l) (!strncmp(s1, s2, l))
+
+/* typedefs */
+
+typedef long LINENUM; /* must be signed */
+
+/* globals */
+
+extern mode_t filemode;
+
+extern char *buf; /* general purpose buffer */
+extern size_t bufsz; /* general purpose buffer size */
+
+extern bool using_plan_a; /* try to keep everything in memory */
+extern bool out_of_mem; /* ran out of memory in plan a */
+
+#define MAXFILEC 2
+
+extern char *filearg[MAXFILEC];
+extern bool ok_to_create_file;
+extern char *outname;
+extern char *origprae;
+
+extern char *TMPOUTNAME;
+extern char *TMPINNAME;
+extern char *TMPREJNAME;
+extern char *TMPPATNAME;
+extern bool toutkeep;
+extern bool trejkeep;
+
+#ifdef DEBUGGING
+extern int debug;
+#endif
+
+extern bool force;
+extern bool batch;
+extern bool verbose;
+extern bool reverse;
+extern bool noreverse;
+extern bool skip_rest_of_patch;
+extern int strippath;
+extern bool canonicalize;
+/* TRUE if -C was specified on command line. */
+extern bool check_only;
+extern bool warn_on_invalid_line;
+extern bool last_line_missing_eol;
+
+
+#define CONTEXT_DIFF 1
+#define NORMAL_DIFF 2
+#define ED_DIFF 3
+#define NEW_CONTEXT_DIFF 4
+#define UNI_DIFF 5
+
+extern int diff_type;
+extern char *revision; /* prerequisite revision, if any */
+extern LINENUM input_lines; /* how long is input file in lines */
+
+extern int posix;
+