1083 lines
26 KiB
C
1083 lines
26 KiB
C
/*-
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* Copyright 1986, Larry Wall
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following condition is met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this condition and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* patch - a program to apply diffs to original files
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*
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* -C option added in 1998, original code by Marc Espie, based on FreeBSD
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* behaviour
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*
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* $OpenBSD: patch.c,v 1.54 2014/12/13 10:31:07 tobias Exp $
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* $FreeBSD$
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <getopt.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "common.h"
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#include "util.h"
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#include "pch.h"
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#include "inp.h"
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#include "backupfile.h"
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#include "pathnames.h"
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mode_t filemode = 0644;
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char *buf; /* general purpose buffer */
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size_t buf_size; /* size of the general purpose buffer */
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bool using_plan_a = true; /* try to keep everything in memory */
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bool out_of_mem = false; /* ran out of memory in plan a */
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#define MAXFILEC 2
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char *filearg[MAXFILEC];
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bool ok_to_create_file = false;
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char *outname = NULL;
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char *origprae = NULL;
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char *TMPOUTNAME;
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char *TMPINNAME;
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char *TMPREJNAME;
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char *TMPPATNAME;
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bool toutkeep = false;
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bool trejkeep = false;
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bool warn_on_invalid_line;
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bool last_line_missing_eol;
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#ifdef DEBUGGING
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int debug = 0;
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#endif
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bool force = false;
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bool batch = false;
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bool verbose = true;
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bool reverse = false;
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bool noreverse = false;
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bool skip_rest_of_patch = false;
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int strippath = 957;
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bool canonicalize = false;
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bool check_only = false;
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int diff_type = 0;
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char *revision = NULL; /* prerequisite revision, if any */
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LINENUM input_lines = 0; /* how long is input file in lines */
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int posix = 0; /* strict POSIX mode? */
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static void reinitialize_almost_everything(void);
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static void get_some_switches(void);
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static LINENUM locate_hunk(LINENUM);
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static void abort_context_hunk(void);
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static void rej_line(int, LINENUM);
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static void abort_hunk(void);
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static void apply_hunk(LINENUM);
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static void init_output(const char *);
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static void init_reject(const char *);
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static void copy_till(LINENUM, bool);
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static bool spew_output(void);
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static void dump_line(LINENUM, bool);
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static bool patch_match(LINENUM, LINENUM, LINENUM);
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static bool similar(const char *, const char *, int);
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static void usage(void);
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/* true if -E was specified on command line. */
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static bool remove_empty_files = false;
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/* true if -R was specified on command line. */
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static bool reverse_flag_specified = false;
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static bool Vflag = false;
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/* buffer holding the name of the rejected patch file. */
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static char rejname[NAME_MAX + 1];
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/* how many input lines have been irretractibly output */
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static LINENUM last_frozen_line = 0;
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static int Argc; /* guess */
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static char **Argv;
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static int Argc_last; /* for restarting plan_b */
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static char **Argv_last;
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static FILE *ofp = NULL; /* output file pointer */
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static FILE *rejfp = NULL; /* reject file pointer */
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static int filec = 0; /* how many file arguments? */
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static LINENUM last_offset = 0;
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static LINENUM maxfuzz = 2;
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/* patch using ifdef, ifndef, etc. */
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static bool do_defines = false;
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/* #ifdef xyzzy */
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static char if_defined[128];
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/* #ifndef xyzzy */
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static char not_defined[128];
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/* #else */
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static const char else_defined[] = "#else\n";
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/* #endif xyzzy */
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static char end_defined[128];
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/* Apply a set of diffs as appropriate. */
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int
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main(int argc, char *argv[])
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{
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int error = 0, hunk, failed, i, fd;
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bool patch_seen, reverse_seen;
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LINENUM where = 0, newwhere, fuzz, mymaxfuzz;
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const char *tmpdir;
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char *v;
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setvbuf(stdout, NULL, _IOLBF, 0);
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setvbuf(stderr, NULL, _IOLBF, 0);
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for (i = 0; i < MAXFILEC; i++)
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filearg[i] = NULL;
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buf_size = INITLINELEN;
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buf = malloc((unsigned)(buf_size));
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if (buf == NULL)
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fatal("out of memory\n");
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/* Cons up the names of the temporary files. */
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if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
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tmpdir = _PATH_TMP;
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for (i = strlen(tmpdir) - 1; i > 0 && tmpdir[i] == '/'; i--)
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;
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i++;
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if (asprintf(&TMPOUTNAME, "%.*s/patchoXXXXXXXXXX", i, tmpdir) == -1)
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fatal("cannot allocate memory");
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if ((fd = mkstemp(TMPOUTNAME)) < 0)
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pfatal("can't create %s", TMPOUTNAME);
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close(fd);
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if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1)
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fatal("cannot allocate memory");
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if ((fd = mkstemp(TMPINNAME)) < 0)
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pfatal("can't create %s", TMPINNAME);
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close(fd);
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if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1)
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fatal("cannot allocate memory");
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if ((fd = mkstemp(TMPREJNAME)) < 0)
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pfatal("can't create %s", TMPREJNAME);
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close(fd);
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if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1)
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fatal("cannot allocate memory");
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if ((fd = mkstemp(TMPPATNAME)) < 0)
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pfatal("can't create %s", TMPPATNAME);
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close(fd);
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v = getenv("SIMPLE_BACKUP_SUFFIX");
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if (v)
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simple_backup_suffix = v;
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else
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simple_backup_suffix = ORIGEXT;
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/* parse switches */
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Argc = argc;
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Argv = argv;
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get_some_switches();
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if (!Vflag) {
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if ((v = getenv("PATCH_VERSION_CONTROL")) == NULL)
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v = getenv("VERSION_CONTROL");
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if (v != NULL || !posix)
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backup_type = get_version(v); /* OK to pass NULL. */
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}
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/* make sure we clean up /tmp in case of disaster */
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set_signals(0);
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patch_seen = false;
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for (open_patch_file(filearg[1]); there_is_another_patch();
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reinitialize_almost_everything()) {
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/* for each patch in patch file */
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patch_seen = true;
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warn_on_invalid_line = true;
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if (outname == NULL)
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outname = xstrdup(filearg[0]);
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/* for ed script just up and do it and exit */
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if (diff_type == ED_DIFF) {
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do_ed_script();
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continue;
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}
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/* initialize the patched file */
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if (!skip_rest_of_patch)
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init_output(TMPOUTNAME);
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/* initialize reject file */
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init_reject(TMPREJNAME);
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/* find out where all the lines are */
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if (!skip_rest_of_patch)
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scan_input(filearg[0]);
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/*
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* from here on, open no standard i/o files, because
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* malloc might misfire and we can't catch it easily
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*/
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/* apply each hunk of patch */
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hunk = 0;
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failed = 0;
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reverse_seen = false;
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out_of_mem = false;
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while (another_hunk()) {
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hunk++;
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fuzz = 0;
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mymaxfuzz = pch_context();
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if (maxfuzz < mymaxfuzz)
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mymaxfuzz = maxfuzz;
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if (!skip_rest_of_patch) {
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do {
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where = locate_hunk(fuzz);
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if (hunk == 1 && where == 0 && !force && !reverse_seen) {
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/* dwim for reversed patch? */
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if (!pch_swap()) {
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if (fuzz == 0)
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say("Not enough memory to try swapped hunk! Assuming unswapped.\n");
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continue;
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}
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reverse = !reverse;
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/* try again */
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where = locate_hunk(fuzz);
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if (where == 0) {
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/* didn't find it swapped */
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if (!pch_swap())
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/* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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reverse = !reverse;
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} else if (noreverse) {
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if (!pch_swap())
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/* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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reverse = !reverse;
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say("Ignoring previously applied (or reversed) patch.\n");
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skip_rest_of_patch = true;
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} else if (batch) {
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if (verbose)
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say("%seversed (or previously applied) patch detected! %s -R.",
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reverse ? "R" : "Unr",
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reverse ? "Assuming" : "Ignoring");
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} else {
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ask("%seversed (or previously applied) patch detected! %s -R? [y] ",
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reverse ? "R" : "Unr",
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reverse ? "Assume" : "Ignore");
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if (*buf == 'n') {
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ask("Apply anyway? [n] ");
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if (*buf != 'y')
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skip_rest_of_patch = true;
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else
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reverse_seen = true;
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where = 0;
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reverse = !reverse;
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if (!pch_swap())
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/* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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}
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}
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}
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} while (!skip_rest_of_patch && where == 0 &&
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++fuzz <= mymaxfuzz);
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if (skip_rest_of_patch) { /* just got decided */
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if (ferror(ofp) || fclose(ofp)) {
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say("Error writing %s\n",
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TMPOUTNAME);
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error = 1;
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}
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ofp = NULL;
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}
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}
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newwhere = pch_newfirst() + last_offset;
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if (skip_rest_of_patch) {
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abort_hunk();
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failed++;
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if (verbose)
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say("Hunk #%d ignored at %ld.\n",
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hunk, newwhere);
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} else if (where == 0) {
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abort_hunk();
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failed++;
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if (verbose)
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say("Hunk #%d failed at %ld.\n",
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hunk, newwhere);
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} else {
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apply_hunk(where);
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if (verbose) {
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say("Hunk #%d succeeded at %ld",
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hunk, newwhere);
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if (fuzz != 0)
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say(" with fuzz %ld", fuzz);
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if (last_offset)
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say(" (offset %ld line%s)",
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last_offset,
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last_offset == 1L ? "" : "s");
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say(".\n");
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}
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}
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}
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if (out_of_mem && using_plan_a) {
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Argc = Argc_last;
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Argv = Argv_last;
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say("\n\nRan out of memory using Plan A--trying again...\n\n");
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if (ofp)
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fclose(ofp);
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ofp = NULL;
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if (rejfp)
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fclose(rejfp);
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rejfp = NULL;
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continue;
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}
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if (hunk == 0)
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fatal("Internal error: hunk should not be 0\n");
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/* finish spewing out the new file */
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if (!skip_rest_of_patch && !spew_output()) {
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say("Can't write %s\n", TMPOUTNAME);
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error = 1;
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}
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/* and put the output where desired */
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ignore_signals();
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if (!skip_rest_of_patch) {
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struct stat statbuf;
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char *realout = outname;
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if (!check_only) {
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if (move_file(TMPOUTNAME, outname) < 0) {
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toutkeep = true;
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realout = TMPOUTNAME;
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chmod(TMPOUTNAME, filemode);
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} else
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chmod(outname, filemode);
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if (remove_empty_files &&
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stat(realout, &statbuf) == 0 &&
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statbuf.st_size == 0) {
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if (verbose)
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say("Removing %s (empty after patching).\n",
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realout);
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unlink(realout);
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}
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}
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}
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if (ferror(rejfp) || fclose(rejfp)) {
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say("Error writing %s\n", rejname);
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error = 1;
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}
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rejfp = NULL;
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if (failed) {
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error = 1;
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if (*rejname == '\0') {
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if (strlcpy(rejname, outname,
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sizeof(rejname)) >= sizeof(rejname))
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fatal("filename %s is too long\n", outname);
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if (strlcat(rejname, REJEXT,
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sizeof(rejname)) >= sizeof(rejname))
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fatal("filename %s is too long\n", outname);
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}
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if (!check_only)
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say("%d out of %d hunks %s--saving rejects to %s\n",
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failed, hunk, skip_rest_of_patch ? "ignored" : "failed", rejname);
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else
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say("%d out of %d hunks %s while patching %s\n",
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failed, hunk, skip_rest_of_patch ? "ignored" : "failed", filearg[0]);
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if (!check_only && move_file(TMPREJNAME, rejname) < 0)
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trejkeep = true;
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}
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set_signals(1);
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}
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if (!patch_seen)
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error = 2;
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my_exit(error);
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/* NOTREACHED */
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}
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/* Prepare to find the next patch to do in the patch file. */
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static void
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reinitialize_almost_everything(void)
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{
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re_patch();
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re_input();
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input_lines = 0;
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last_frozen_line = 0;
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filec = 0;
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if (!out_of_mem) {
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free(filearg[0]);
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filearg[0] = NULL;
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}
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free(outname);
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outname = NULL;
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last_offset = 0;
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diff_type = 0;
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free(revision);
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revision = NULL;
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reverse = reverse_flag_specified;
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skip_rest_of_patch = false;
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get_some_switches();
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}
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/* Process switches and filenames. */
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static void
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get_some_switches(void)
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{
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const char *options = "b::B:cCd:D:eEfF:i:lnNo:p:r:RstuvV:x:z:";
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static struct option longopts[] = {
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{"backup", no_argument, 0, 'b'},
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{"batch", no_argument, 0, 't'},
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{"check", no_argument, 0, 'C'},
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{"context", no_argument, 0, 'c'},
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{"debug", required_argument, 0, 'x'},
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{"directory", required_argument, 0, 'd'},
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{"dry-run", no_argument, 0, 'C'},
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{"ed", no_argument, 0, 'e'},
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{"force", no_argument, 0, 'f'},
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{"forward", no_argument, 0, 'N'},
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{"fuzz", required_argument, 0, 'F'},
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{"ifdef", required_argument, 0, 'D'},
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{"input", required_argument, 0, 'i'},
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{"ignore-whitespace", no_argument, 0, 'l'},
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{"normal", no_argument, 0, 'n'},
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{"output", required_argument, 0, 'o'},
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{"prefix", required_argument, 0, 'B'},
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{"quiet", no_argument, 0, 's'},
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{"reject-file", required_argument, 0, 'r'},
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{"remove-empty-files", no_argument, 0, 'E'},
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{"reverse", no_argument, 0, 'R'},
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{"silent", no_argument, 0, 's'},
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{"strip", required_argument, 0, 'p'},
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{"suffix", required_argument, 0, 'z'},
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{"unified", no_argument, 0, 'u'},
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{"version", no_argument, 0, 'v'},
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{"version-control", required_argument, 0, 'V'},
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{"posix", no_argument, &posix, 1},
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{NULL, 0, 0, 0}
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};
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int ch;
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rejname[0] = '\0';
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Argc_last = Argc;
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Argv_last = Argv;
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if (!Argc)
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return;
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optreset = optind = 1;
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while ((ch = getopt_long(Argc, Argv, options, longopts, NULL)) != -1) {
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switch (ch) {
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case 'b':
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if (backup_type == none)
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backup_type = numbered_existing;
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if (optarg == NULL)
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break;
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if (verbose)
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say("Warning, the ``-b suffix'' option has been"
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" obsoleted by the -z option.\n");
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/* FALLTHROUGH */
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case 'z':
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/* must directly follow 'b' case for backwards compat */
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simple_backup_suffix = xstrdup(optarg);
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break;
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case 'B':
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|
origprae = xstrdup(optarg);
|
|
break;
|
|
case 'c':
|
|
diff_type = CONTEXT_DIFF;
|
|
break;
|
|
case 'C':
|
|
check_only = true;
|
|
break;
|
|
case 'd':
|
|
if (chdir(optarg) < 0)
|
|
pfatal("can't cd to %s", optarg);
|
|
break;
|
|
case 'D':
|
|
do_defines = true;
|
|
if (!isalpha((unsigned char)*optarg) && *optarg != '_')
|
|
fatal("argument to -D is not an identifier\n");
|
|
snprintf(if_defined, sizeof if_defined,
|
|
"#ifdef %s\n", optarg);
|
|
snprintf(not_defined, sizeof not_defined,
|
|
"#ifndef %s\n", optarg);
|
|
snprintf(end_defined, sizeof end_defined,
|
|
"#endif /* %s */\n", optarg);
|
|
break;
|
|
case 'e':
|
|
diff_type = ED_DIFF;
|
|
break;
|
|
case 'E':
|
|
remove_empty_files = true;
|
|
break;
|
|
case 'f':
|
|
force = true;
|
|
break;
|
|
case 'F':
|
|
maxfuzz = atoi(optarg);
|
|
break;
|
|
case 'i':
|
|
if (++filec == MAXFILEC)
|
|
fatal("too many file arguments\n");
|
|
filearg[filec] = xstrdup(optarg);
|
|
break;
|
|
case 'l':
|
|
canonicalize = true;
|
|
break;
|
|
case 'n':
|
|
diff_type = NORMAL_DIFF;
|
|
break;
|
|
case 'N':
|
|
noreverse = true;
|
|
break;
|
|
case 'o':
|
|
outname = xstrdup(optarg);
|
|
break;
|
|
case 'p':
|
|
strippath = atoi(optarg);
|
|
break;
|
|
case 'r':
|
|
if (strlcpy(rejname, optarg,
|
|
sizeof(rejname)) >= sizeof(rejname))
|
|
fatal("argument for -r is too long\n");
|
|
break;
|
|
case 'R':
|
|
reverse = true;
|
|
reverse_flag_specified = true;
|
|
break;
|
|
case 's':
|
|
verbose = false;
|
|
break;
|
|
case 't':
|
|
batch = true;
|
|
break;
|
|
case 'u':
|
|
diff_type = UNI_DIFF;
|
|
break;
|
|
case 'v':
|
|
version();
|
|
break;
|
|
case 'V':
|
|
backup_type = get_version(optarg);
|
|
Vflag = true;
|
|
break;
|
|
#ifdef DEBUGGING
|
|
case 'x':
|
|
debug = atoi(optarg);
|
|
break;
|
|
#endif
|
|
default:
|
|
if (ch != '\0')
|
|
usage();
|
|
break;
|
|
}
|
|
}
|
|
Argc -= optind;
|
|
Argv += optind;
|
|
|
|
if (Argc > 0) {
|
|
filearg[0] = xstrdup(*Argv++);
|
|
Argc--;
|
|
while (Argc > 0) {
|
|
if (++filec == MAXFILEC)
|
|
fatal("too many file arguments\n");
|
|
filearg[filec] = xstrdup(*Argv++);
|
|
Argc--;
|
|
}
|
|
}
|
|
|
|
if (getenv("POSIXLY_CORRECT") != NULL)
|
|
posix = 1;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: patch [-bCcEeflNnRstuv] [-B backup-prefix] [-D symbol] [-d directory]\n"
|
|
" [-F max-fuzz] [-i patchfile] [-o out-file] [-p strip-count]\n"
|
|
" [-r rej-name] [-V t | nil | never | none] [-x number]\n"
|
|
" [-z backup-ext] [--posix] [origfile [patchfile]]\n"
|
|
" patch <patchfile\n");
|
|
my_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/*
|
|
* Attempt to find the right place to apply this hunk of patch.
|
|
*/
|
|
static LINENUM
|
|
locate_hunk(LINENUM fuzz)
|
|
{
|
|
LINENUM first_guess = pch_first() + last_offset;
|
|
LINENUM offset;
|
|
LINENUM pat_lines = pch_ptrn_lines();
|
|
LINENUM max_pos_offset = input_lines - first_guess - pat_lines + 1;
|
|
LINENUM max_neg_offset = first_guess - last_frozen_line - 1 + pch_context();
|
|
|
|
if (pat_lines == 0) { /* null range matches always */
|
|
if (verbose && fuzz == 0 && (diff_type == CONTEXT_DIFF
|
|
|| diff_type == NEW_CONTEXT_DIFF
|
|
|| diff_type == UNI_DIFF)) {
|
|
say("Empty context always matches.\n");
|
|
}
|
|
return (first_guess);
|
|
}
|
|
if (max_neg_offset >= first_guess) /* do not try lines < 0 */
|
|
max_neg_offset = first_guess - 1;
|
|
if (first_guess <= input_lines && patch_match(first_guess, 0, fuzz))
|
|
return first_guess;
|
|
for (offset = 1; ; offset++) {
|
|
bool check_after = (offset <= max_pos_offset);
|
|
bool check_before = (offset <= max_neg_offset);
|
|
|
|
if (check_after && patch_match(first_guess, offset, fuzz)) {
|
|
#ifdef DEBUGGING
|
|
if (debug & 1)
|
|
say("Offset changing from %ld to %ld\n",
|
|
last_offset, offset);
|
|
#endif
|
|
last_offset = offset;
|
|
return first_guess + offset;
|
|
} else if (check_before && patch_match(first_guess, -offset, fuzz)) {
|
|
#ifdef DEBUGGING
|
|
if (debug & 1)
|
|
say("Offset changing from %ld to %ld\n",
|
|
last_offset, -offset);
|
|
#endif
|
|
last_offset = -offset;
|
|
return first_guess - offset;
|
|
} else if (!check_before && !check_after)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* We did not find the pattern, dump out the hunk so they can handle it. */
|
|
|
|
static void
|
|
abort_context_hunk(void)
|
|
{
|
|
LINENUM i;
|
|
const LINENUM pat_end = pch_end();
|
|
/*
|
|
* add in last_offset to guess the same as the previous successful
|
|
* hunk
|
|
*/
|
|
const LINENUM oldfirst = pch_first() + last_offset;
|
|
const LINENUM newfirst = pch_newfirst() + last_offset;
|
|
const LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1;
|
|
const LINENUM newlast = newfirst + pch_repl_lines() - 1;
|
|
const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : "");
|
|
const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----");
|
|
|
|
fprintf(rejfp, "***************\n");
|
|
for (i = 0; i <= pat_end; i++) {
|
|
switch (pch_char(i)) {
|
|
case '*':
|
|
if (oldlast < oldfirst)
|
|
fprintf(rejfp, "*** 0%s\n", stars);
|
|
else if (oldlast == oldfirst)
|
|
fprintf(rejfp, "*** %ld%s\n", oldfirst, stars);
|
|
else
|
|
fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst,
|
|
oldlast, stars);
|
|
break;
|
|
case '=':
|
|
if (newlast < newfirst)
|
|
fprintf(rejfp, "--- 0%s\n", minuses);
|
|
else if (newlast == newfirst)
|
|
fprintf(rejfp, "--- %ld%s\n", newfirst, minuses);
|
|
else
|
|
fprintf(rejfp, "--- %ld,%ld%s\n", newfirst,
|
|
newlast, minuses);
|
|
break;
|
|
case '\n':
|
|
fprintf(rejfp, "%s", pfetch(i));
|
|
break;
|
|
case ' ':
|
|
case '-':
|
|
case '+':
|
|
case '!':
|
|
fprintf(rejfp, "%c %s", pch_char(i), pfetch(i));
|
|
break;
|
|
default:
|
|
fatal("fatal internal error in abort_context_hunk\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
rej_line(int ch, LINENUM i)
|
|
{
|
|
size_t len;
|
|
const char *line = pfetch(i);
|
|
|
|
len = strnlen(line, USHRT_MAX);
|
|
|
|
fprintf(rejfp, "%c%s", ch, line);
|
|
if (len == 0 || line[len-1] != '\n') {
|
|
if (len >= USHRT_MAX)
|
|
fprintf(rejfp, "\n\\ Line too long\n");
|
|
else
|
|
fprintf(rejfp, "\n\\ No newline at end of line\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
abort_hunk(void)
|
|
{
|
|
LINENUM i, j, split;
|
|
int ch1, ch2;
|
|
const LINENUM pat_end = pch_end();
|
|
const LINENUM oldfirst = pch_first() + last_offset;
|
|
const LINENUM newfirst = pch_newfirst() + last_offset;
|
|
|
|
if (diff_type != UNI_DIFF) {
|
|
abort_context_hunk();
|
|
return;
|
|
}
|
|
split = -1;
|
|
for (i = 0; i <= pat_end; i++) {
|
|
if (pch_char(i) == '=') {
|
|
split = i;
|
|
break;
|
|
}
|
|
}
|
|
if (split == -1) {
|
|
fprintf(rejfp, "malformed hunk: no split found\n");
|
|
return;
|
|
}
|
|
i = 0;
|
|
j = split + 1;
|
|
fprintf(rejfp, "@@ -%ld,%ld +%ld,%ld @@\n",
|
|
pch_ptrn_lines() ? oldfirst : 0,
|
|
pch_ptrn_lines(), newfirst, pch_repl_lines());
|
|
while (i < split || j <= pat_end) {
|
|
ch1 = i < split ? pch_char(i) : -1;
|
|
ch2 = j <= pat_end ? pch_char(j) : -1;
|
|
if (ch1 == '-') {
|
|
rej_line('-', i);
|
|
i++;
|
|
} else if (ch1 == ' ' && ch2 == ' ') {
|
|
rej_line(' ', i);
|
|
i++;
|
|
j++;
|
|
} else if (ch1 == '!' && ch2 == '!') {
|
|
while (i < split && ch1 == '!') {
|
|
rej_line('-', i);
|
|
i++;
|
|
ch1 = i < split ? pch_char(i) : -1;
|
|
}
|
|
while (j <= pat_end && ch2 == '!') {
|
|
rej_line('+', j);
|
|
j++;
|
|
ch2 = j <= pat_end ? pch_char(j) : -1;
|
|
}
|
|
} else if (ch1 == '*') {
|
|
i++;
|
|
} else if (ch2 == '+' || ch2 == ' ') {
|
|
rej_line(ch2, j);
|
|
j++;
|
|
} else {
|
|
fprintf(rejfp, "internal error on (%ld %ld %ld)\n",
|
|
i, split, j);
|
|
rej_line(ch1, i);
|
|
rej_line(ch2, j);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We found where to apply it (we hope), so do it. */
|
|
|
|
static void
|
|
apply_hunk(LINENUM where)
|
|
{
|
|
LINENUM old = 1;
|
|
const LINENUM lastline = pch_ptrn_lines();
|
|
LINENUM new = lastline + 1;
|
|
#define OUTSIDE 0
|
|
#define IN_IFNDEF 1
|
|
#define IN_IFDEF 2
|
|
#define IN_ELSE 3
|
|
int def_state = OUTSIDE;
|
|
const LINENUM pat_end = pch_end();
|
|
|
|
where--;
|
|
while (pch_char(new) == '=' || pch_char(new) == '\n')
|
|
new++;
|
|
|
|
while (old <= lastline) {
|
|
if (pch_char(old) == '-') {
|
|
copy_till(where + old - 1, false);
|
|
if (do_defines) {
|
|
if (def_state == OUTSIDE) {
|
|
fputs(not_defined, ofp);
|
|
def_state = IN_IFNDEF;
|
|
} else if (def_state == IN_IFDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
fputs(pfetch(old), ofp);
|
|
}
|
|
last_frozen_line++;
|
|
old++;
|
|
} else if (new > pat_end) {
|
|
break;
|
|
} else if (pch_char(new) == '+') {
|
|
copy_till(where + old - 1, false);
|
|
if (do_defines) {
|
|
if (def_state == IN_IFNDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
} else if (def_state == OUTSIDE) {
|
|
fputs(if_defined, ofp);
|
|
def_state = IN_IFDEF;
|
|
}
|
|
}
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
} else if (pch_char(new) != pch_char(old)) {
|
|
say("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n",
|
|
pch_hunk_beg() + old,
|
|
pch_hunk_beg() + new);
|
|
#ifdef DEBUGGING
|
|
say("oldchar = '%c', newchar = '%c'\n",
|
|
pch_char(old), pch_char(new));
|
|
#endif
|
|
my_exit(2);
|
|
} else if (pch_char(new) == '!') {
|
|
copy_till(where + old - 1, false);
|
|
if (do_defines) {
|
|
fputs(not_defined, ofp);
|
|
def_state = IN_IFNDEF;
|
|
}
|
|
while (pch_char(old) == '!') {
|
|
if (do_defines) {
|
|
fputs(pfetch(old), ofp);
|
|
}
|
|
last_frozen_line++;
|
|
old++;
|
|
}
|
|
if (do_defines) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
while (pch_char(new) == '!') {
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
}
|
|
} else {
|
|
if (pch_char(new) != ' ')
|
|
fatal("Internal error: expected ' '\n");
|
|
old++;
|
|
new++;
|
|
if (do_defines && def_state != OUTSIDE) {
|
|
fputs(end_defined, ofp);
|
|
def_state = OUTSIDE;
|
|
}
|
|
}
|
|
}
|
|
if (new <= pat_end && pch_char(new) == '+') {
|
|
copy_till(where + old - 1, false);
|
|
if (do_defines) {
|
|
if (def_state == OUTSIDE) {
|
|
fputs(if_defined, ofp);
|
|
def_state = IN_IFDEF;
|
|
} else if (def_state == IN_IFNDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
}
|
|
while (new <= pat_end && pch_char(new) == '+') {
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
}
|
|
}
|
|
if (do_defines && def_state != OUTSIDE) {
|
|
fputs(end_defined, ofp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Open the new file.
|
|
*/
|
|
static void
|
|
init_output(const char *name)
|
|
{
|
|
ofp = fopen(name, "w");
|
|
if (ofp == NULL)
|
|
pfatal("can't create %s", name);
|
|
}
|
|
|
|
/*
|
|
* Open a file to put hunks we can't locate.
|
|
*/
|
|
static void
|
|
init_reject(const char *name)
|
|
{
|
|
rejfp = fopen(name, "w");
|
|
if (rejfp == NULL)
|
|
pfatal("can't create %s", name);
|
|
}
|
|
|
|
/*
|
|
* Copy input file to output, up to wherever hunk is to be applied.
|
|
* If endoffile is true, treat the last line specially since it may
|
|
* lack a newline.
|
|
*/
|
|
static void
|
|
copy_till(LINENUM lastline, bool endoffile)
|
|
{
|
|
if (last_frozen_line > lastline)
|
|
fatal("misordered hunks! output would be garbled\n");
|
|
while (last_frozen_line < lastline) {
|
|
if (++last_frozen_line == lastline && endoffile)
|
|
dump_line(last_frozen_line, !last_line_missing_eol);
|
|
else
|
|
dump_line(last_frozen_line, true);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finish copying the input file to the output file.
|
|
*/
|
|
static bool
|
|
spew_output(void)
|
|
{
|
|
int rv;
|
|
|
|
#ifdef DEBUGGING
|
|
if (debug & 256)
|
|
say("il=%ld lfl=%ld\n", input_lines, last_frozen_line);
|
|
#endif
|
|
if (input_lines)
|
|
copy_till(input_lines, true); /* dump remainder of file */
|
|
rv = ferror(ofp) == 0 && fclose(ofp) == 0;
|
|
ofp = NULL;
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Copy one line from input to output.
|
|
*/
|
|
static void
|
|
dump_line(LINENUM line, bool write_newline)
|
|
{
|
|
char *s;
|
|
|
|
s = ifetch(line, 0);
|
|
if (s == NULL)
|
|
return;
|
|
/* Note: string is not NUL terminated. */
|
|
for (; *s != '\n'; s++)
|
|
putc(*s, ofp);
|
|
if (write_newline)
|
|
putc('\n', ofp);
|
|
}
|
|
|
|
/*
|
|
* Does the patch pattern match at line base+offset?
|
|
*/
|
|
static bool
|
|
patch_match(LINENUM base, LINENUM offset, LINENUM fuzz)
|
|
{
|
|
LINENUM pline = 1 + fuzz;
|
|
LINENUM iline;
|
|
LINENUM pat_lines = pch_ptrn_lines() - fuzz;
|
|
const char *ilineptr;
|
|
const char *plineptr;
|
|
unsigned short plinelen;
|
|
|
|
for (iline = base + offset + fuzz; pline <= pat_lines; pline++, iline++) {
|
|
ilineptr = ifetch(iline, offset >= 0);
|
|
if (ilineptr == NULL)
|
|
return false;
|
|
plineptr = pfetch(pline);
|
|
plinelen = pch_line_len(pline);
|
|
if (canonicalize) {
|
|
if (!similar(ilineptr, plineptr, plinelen))
|
|
return false;
|
|
} else if (strnNE(ilineptr, plineptr, plinelen))
|
|
return false;
|
|
if (iline == input_lines) {
|
|
/*
|
|
* We are looking at the last line of the file.
|
|
* If the file has no eol, the patch line should
|
|
* not have one either and vice-versa. Note that
|
|
* plinelen > 0.
|
|
*/
|
|
if (last_line_missing_eol) {
|
|
if (plineptr[plinelen - 1] == '\n')
|
|
return false;
|
|
} else {
|
|
if (plineptr[plinelen - 1] != '\n')
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Do two lines match with canonicalized white space?
|
|
*/
|
|
static bool
|
|
similar(const char *a, const char *b, int len)
|
|
{
|
|
while (len) {
|
|
if (isspace((unsigned char)*b)) { /* whitespace (or \n) to match? */
|
|
if (!isspace((unsigned char)*a)) /* no corresponding whitespace? */
|
|
return false;
|
|
while (len && isspace((unsigned char)*b) && *b != '\n')
|
|
b++, len--; /* skip pattern whitespace */
|
|
while (isspace((unsigned char)*a) && *a != '\n')
|
|
a++; /* skip target whitespace */
|
|
if (*a == '\n' || *b == '\n')
|
|
return (*a == *b); /* should end in sync */
|
|
} else if (*a++ != *b++) /* match non-whitespace chars */
|
|
return false;
|
|
else
|
|
len--; /* probably not necessary */
|
|
}
|
|
return true; /* actually, this is not reached */
|
|
/* since there is always a \n */
|
|
}
|