mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
1070 lines
26 KiB
C
1070 lines
26 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* patch - a program to apply diffs to original files
|
|
*
|
|
* -C option added in 1998, original code by Marc Espie, based on FreeBSD
|
|
* behaviour
|
|
*
|
|
* $OpenBSD: patch.c,v 1.50 2012/05/15 19:32:02 millert Exp $
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <ctype.h>
|
|
#include <getopt.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "common.h"
|
|
#include "util.h"
|
|
#include "pch.h"
|
|
#include "inp.h"
|
|
#include "backupfile.h"
|
|
#include "pathnames.h"
|
|
|
|
mode_t filemode = 0644;
|
|
|
|
char *buf; /* general purpose buffer */
|
|
size_t buf_size; /* size of the general purpose buffer */
|
|
|
|
bool using_plan_a = true; /* try to keep everything in memory */
|
|
bool out_of_mem = false; /* ran out of memory in plan a */
|
|
|
|
#define MAXFILEC 2
|
|
|
|
char *filearg[MAXFILEC];
|
|
bool ok_to_create_file = false;
|
|
char *outname = NULL;
|
|
char *origprae = NULL;
|
|
char *TMPOUTNAME;
|
|
char *TMPINNAME;
|
|
char *TMPREJNAME;
|
|
char *TMPPATNAME;
|
|
bool toutkeep = false;
|
|
bool trejkeep = false;
|
|
bool warn_on_invalid_line;
|
|
bool last_line_missing_eol;
|
|
|
|
#ifdef DEBUGGING
|
|
int debug = 0;
|
|
#endif
|
|
|
|
bool force = false;
|
|
bool batch = false;
|
|
bool verbose = true;
|
|
bool reverse = false;
|
|
bool noreverse = false;
|
|
bool skip_rest_of_patch = false;
|
|
int strippath = 957;
|
|
bool canonicalize = false;
|
|
bool check_only = false;
|
|
int diff_type = 0;
|
|
char *revision = NULL; /* prerequisite revision, if any */
|
|
LINENUM input_lines = 0; /* how long is input file in lines */
|
|
int posix = 0; /* strict POSIX mode? */
|
|
|
|
static void reinitialize_almost_everything(void);
|
|
static void get_some_switches(void);
|
|
static LINENUM locate_hunk(LINENUM);
|
|
static void abort_context_hunk(void);
|
|
static void rej_line(int, LINENUM);
|
|
static void abort_hunk(void);
|
|
static void apply_hunk(LINENUM);
|
|
static void init_output(const char *);
|
|
static void init_reject(const char *);
|
|
static void copy_till(LINENUM, bool);
|
|
static bool spew_output(void);
|
|
static void dump_line(LINENUM, bool);
|
|
static bool patch_match(LINENUM, LINENUM, LINENUM);
|
|
static bool similar(const char *, const char *, int);
|
|
static void usage(void);
|
|
|
|
/* true if -E was specified on command line. */
|
|
static bool remove_empty_files = false;
|
|
|
|
/* true if -R was specified on command line. */
|
|
static bool reverse_flag_specified = false;
|
|
|
|
/* buffer holding the name of the rejected patch file. */
|
|
static char rejname[NAME_MAX + 1];
|
|
|
|
/* how many input lines have been irretractibly output */
|
|
static LINENUM last_frozen_line = 0;
|
|
|
|
static int Argc; /* guess */
|
|
static char **Argv;
|
|
static int Argc_last; /* for restarting plan_b */
|
|
static char **Argv_last;
|
|
|
|
static FILE *ofp = NULL; /* output file pointer */
|
|
static FILE *rejfp = NULL; /* reject file pointer */
|
|
|
|
static int filec = 0; /* how many file arguments? */
|
|
static LINENUM last_offset = 0;
|
|
static LINENUM maxfuzz = 2;
|
|
|
|
/* patch using ifdef, ifndef, etc. */
|
|
static bool do_defines = false;
|
|
/* #ifdef xyzzy */
|
|
static char if_defined[128];
|
|
/* #ifndef xyzzy */
|
|
static char not_defined[128];
|
|
/* #else */
|
|
static const char else_defined[] = "#else\n";
|
|
/* #endif xyzzy */
|
|
static char end_defined[128];
|
|
|
|
|
|
/* Apply a set of diffs as appropriate. */
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int error = 0, hunk, failed, i, fd;
|
|
bool patch_seen;
|
|
LINENUM where = 0, newwhere, fuzz, mymaxfuzz;
|
|
const char *tmpdir;
|
|
char *v;
|
|
|
|
setlinebuf(stdout);
|
|
setlinebuf(stderr);
|
|
for (i = 0; i < MAXFILEC; i++)
|
|
filearg[i] = NULL;
|
|
|
|
buf_size = INITLINELEN;
|
|
buf = malloc((unsigned)(buf_size));
|
|
if (buf == NULL)
|
|
fatal("out of memory\n");
|
|
|
|
/* Cons up the names of the temporary files. */
|
|
if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
|
|
tmpdir = _PATH_TMP;
|
|
for (i = strlen(tmpdir) - 1; i > 0 && tmpdir[i] == '/'; i--)
|
|
;
|
|
i++;
|
|
if (asprintf(&TMPOUTNAME, "%.*s/patchoXXXXXXXXXX", i, tmpdir) == -1)
|
|
fatal("cannot allocate memory");
|
|
if ((fd = mkstemp(TMPOUTNAME)) < 0)
|
|
pfatal("can't create %s", TMPOUTNAME);
|
|
close(fd);
|
|
|
|
if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1)
|
|
fatal("cannot allocate memory");
|
|
if ((fd = mkstemp(TMPINNAME)) < 0)
|
|
pfatal("can't create %s", TMPINNAME);
|
|
close(fd);
|
|
|
|
if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1)
|
|
fatal("cannot allocate memory");
|
|
if ((fd = mkstemp(TMPREJNAME)) < 0)
|
|
pfatal("can't create %s", TMPREJNAME);
|
|
close(fd);
|
|
|
|
if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1)
|
|
fatal("cannot allocate memory");
|
|
if ((fd = mkstemp(TMPPATNAME)) < 0)
|
|
pfatal("can't create %s", TMPPATNAME);
|
|
close(fd);
|
|
|
|
v = getenv("SIMPLE_BACKUP_SUFFIX");
|
|
if (v)
|
|
simple_backup_suffix = v;
|
|
else
|
|
simple_backup_suffix = ORIGEXT;
|
|
|
|
/* parse switches */
|
|
Argc = argc;
|
|
Argv = argv;
|
|
get_some_switches();
|
|
|
|
if (backup_type == none) {
|
|
if ((v = getenv("PATCH_VERSION_CONTROL")) == NULL)
|
|
v = getenv("VERSION_CONTROL");
|
|
if (v != NULL || !posix)
|
|
backup_type = get_version(v); /* OK to pass NULL. */
|
|
}
|
|
|
|
/* make sure we clean up /tmp in case of disaster */
|
|
set_signals(0);
|
|
|
|
patch_seen = false;
|
|
for (open_patch_file(filearg[1]); there_is_another_patch();
|
|
reinitialize_almost_everything()) {
|
|
/* for each patch in patch file */
|
|
|
|
patch_seen = true;
|
|
|
|
warn_on_invalid_line = true;
|
|
|
|
if (outname == NULL)
|
|
outname = savestr(filearg[0]);
|
|
|
|
/* for ed script just up and do it and exit */
|
|
if (diff_type == ED_DIFF) {
|
|
do_ed_script();
|
|
continue;
|
|
}
|
|
/* initialize the patched file */
|
|
if (!skip_rest_of_patch)
|
|
init_output(TMPOUTNAME);
|
|
|
|
/* initialize reject file */
|
|
init_reject(TMPREJNAME);
|
|
|
|
/* find out where all the lines are */
|
|
if (!skip_rest_of_patch)
|
|
scan_input(filearg[0]);
|
|
|
|
/* from here on, open no standard i/o files, because malloc */
|
|
/* might misfire and we can't catch it easily */
|
|
|
|
/* apply each hunk of patch */
|
|
hunk = 0;
|
|
failed = 0;
|
|
out_of_mem = false;
|
|
while (another_hunk()) {
|
|
hunk++;
|
|
fuzz = 0;
|
|
mymaxfuzz = pch_context();
|
|
if (maxfuzz < mymaxfuzz)
|
|
mymaxfuzz = maxfuzz;
|
|
if (!skip_rest_of_patch) {
|
|
do {
|
|
where = locate_hunk(fuzz);
|
|
if (hunk == 1 && where == 0 && !force) {
|
|
/* dwim for reversed patch? */
|
|
if (!pch_swap()) {
|
|
if (fuzz == 0)
|
|
say("Not enough memory to try swapped hunk! Assuming unswapped.\n");
|
|
continue;
|
|
}
|
|
reverse = !reverse;
|
|
/* try again */
|
|
where = locate_hunk(fuzz);
|
|
if (where == 0) {
|
|
/* didn't find it swapped */
|
|
if (!pch_swap())
|
|
/* put it back to normal */
|
|
fatal("lost hunk on alloc error!\n");
|
|
reverse = !reverse;
|
|
} else if (noreverse) {
|
|
if (!pch_swap())
|
|
/* put it back to normal */
|
|
fatal("lost hunk on alloc error!\n");
|
|
reverse = !reverse;
|
|
say("Ignoring previously applied (or reversed) patch.\n");
|
|
skip_rest_of_patch = true;
|
|
} else if (batch) {
|
|
if (verbose)
|
|
say("%seversed (or previously applied) patch detected! %s -R.",
|
|
reverse ? "R" : "Unr",
|
|
reverse ? "Assuming" : "Ignoring");
|
|
} else {
|
|
ask("%seversed (or previously applied) patch detected! %s -R? [y] ",
|
|
reverse ? "R" : "Unr",
|
|
reverse ? "Assume" : "Ignore");
|
|
if (*buf == 'n') {
|
|
ask("Apply anyway? [n] ");
|
|
if (*buf != 'y')
|
|
skip_rest_of_patch = true;
|
|
where = 0;
|
|
reverse = !reverse;
|
|
if (!pch_swap())
|
|
/* put it back to normal */
|
|
fatal("lost hunk on alloc error!\n");
|
|
}
|
|
}
|
|
}
|
|
} while (!skip_rest_of_patch && where == 0 &&
|
|
++fuzz <= mymaxfuzz);
|
|
|
|
if (skip_rest_of_patch) { /* just got decided */
|
|
if (ferror(ofp) || fclose(ofp)) {
|
|
say("Error writing %s\n",
|
|
TMPOUTNAME);
|
|
error = 1;
|
|
}
|
|
ofp = NULL;
|
|
}
|
|
}
|
|
newwhere = pch_newfirst() + last_offset;
|
|
if (skip_rest_of_patch) {
|
|
abort_hunk();
|
|
failed++;
|
|
if (verbose)
|
|
say("Hunk #%d ignored at %ld.\n",
|
|
hunk, newwhere);
|
|
} else if (where == 0) {
|
|
abort_hunk();
|
|
failed++;
|
|
if (verbose)
|
|
say("Hunk #%d failed at %ld.\n",
|
|
hunk, newwhere);
|
|
} else {
|
|
apply_hunk(where);
|
|
if (verbose) {
|
|
say("Hunk #%d succeeded at %ld",
|
|
hunk, newwhere);
|
|
if (fuzz != 0)
|
|
say(" with fuzz %ld", fuzz);
|
|
if (last_offset)
|
|
say(" (offset %ld line%s)",
|
|
last_offset,
|
|
last_offset == 1L ? "" : "s");
|
|
say(".\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (out_of_mem && using_plan_a) {
|
|
Argc = Argc_last;
|
|
Argv = Argv_last;
|
|
say("\n\nRan out of memory using Plan A--trying again...\n\n");
|
|
if (ofp)
|
|
fclose(ofp);
|
|
ofp = NULL;
|
|
if (rejfp)
|
|
fclose(rejfp);
|
|
rejfp = NULL;
|
|
continue;
|
|
}
|
|
if (hunk == 0)
|
|
fatal("Internal error: hunk should not be 0\n");
|
|
|
|
/* finish spewing out the new file */
|
|
if (!skip_rest_of_patch && !spew_output()) {
|
|
say("Can't write %s\n", TMPOUTNAME);
|
|
error = 1;
|
|
}
|
|
|
|
/* and put the output where desired */
|
|
ignore_signals();
|
|
if (!skip_rest_of_patch) {
|
|
struct stat statbuf;
|
|
char *realout = outname;
|
|
|
|
if (!check_only) {
|
|
if (move_file(TMPOUTNAME, outname) < 0) {
|
|
toutkeep = true;
|
|
realout = TMPOUTNAME;
|
|
chmod(TMPOUTNAME, filemode);
|
|
} else
|
|
chmod(outname, filemode);
|
|
|
|
if (remove_empty_files &&
|
|
stat(realout, &statbuf) == 0 &&
|
|
statbuf.st_size == 0) {
|
|
if (verbose)
|
|
say("Removing %s (empty after patching).\n",
|
|
realout);
|
|
unlink(realout);
|
|
}
|
|
}
|
|
}
|
|
if (ferror(rejfp) || fclose(rejfp)) {
|
|
say("Error writing %s\n", rejname);
|
|
error = 1;
|
|
}
|
|
rejfp = NULL;
|
|
if (failed) {
|
|
error = 1;
|
|
if (*rejname == '\0') {
|
|
if (strlcpy(rejname, outname,
|
|
sizeof(rejname)) >= sizeof(rejname))
|
|
fatal("filename %s is too long\n", outname);
|
|
if (strlcat(rejname, REJEXT,
|
|
sizeof(rejname)) >= sizeof(rejname))
|
|
fatal("filename %s is too long\n", outname);
|
|
}
|
|
if (!check_only)
|
|
say("%d out of %d hunks %s--saving rejects to %s\n",
|
|
failed, hunk, skip_rest_of_patch ? "ignored" : "failed", rejname);
|
|
else
|
|
say("%d out of %d hunks %s\n",
|
|
failed, hunk, skip_rest_of_patch ? "ignored" : "failed");
|
|
if (!check_only && move_file(TMPREJNAME, rejname) < 0)
|
|
trejkeep = true;
|
|
}
|
|
set_signals(1);
|
|
}
|
|
|
|
if (!patch_seen)
|
|
error = 2;
|
|
|
|
my_exit(error);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* Prepare to find the next patch to do in the patch file. */
|
|
|
|
static void
|
|
reinitialize_almost_everything(void)
|
|
{
|
|
re_patch();
|
|
re_input();
|
|
|
|
input_lines = 0;
|
|
last_frozen_line = 0;
|
|
|
|
filec = 0;
|
|
if (!out_of_mem) {
|
|
free(filearg[0]);
|
|
filearg[0] = NULL;
|
|
}
|
|
|
|
free(outname);
|
|
outname = NULL;
|
|
|
|
last_offset = 0;
|
|
diff_type = 0;
|
|
|
|
free(revision);
|
|
revision = NULL;
|
|
|
|
reverse = reverse_flag_specified;
|
|
skip_rest_of_patch = false;
|
|
|
|
get_some_switches();
|
|
}
|
|
|
|
/* Process switches and filenames. */
|
|
|
|
static void
|
|
get_some_switches(void)
|
|
{
|
|
const char *options = "b::B:cCd:D:eEfF:i:lnNo:p:r:RstuvV:x:z:";
|
|
static struct option longopts[] = {
|
|
{"backup", no_argument, 0, 'b'},
|
|
{"batch", no_argument, 0, 't'},
|
|
{"check", no_argument, 0, 'C'},
|
|
{"context", no_argument, 0, 'c'},
|
|
{"debug", required_argument, 0, 'x'},
|
|
{"directory", required_argument, 0, 'd'},
|
|
{"ed", no_argument, 0, 'e'},
|
|
{"force", no_argument, 0, 'f'},
|
|
{"forward", no_argument, 0, 'N'},
|
|
{"fuzz", required_argument, 0, 'F'},
|
|
{"ifdef", required_argument, 0, 'D'},
|
|
{"input", required_argument, 0, 'i'},
|
|
{"ignore-whitespace", no_argument, 0, 'l'},
|
|
{"normal", no_argument, 0, 'n'},
|
|
{"output", required_argument, 0, 'o'},
|
|
{"prefix", required_argument, 0, 'B'},
|
|
{"quiet", no_argument, 0, 's'},
|
|
{"reject-file", required_argument, 0, 'r'},
|
|
{"remove-empty-files", no_argument, 0, 'E'},
|
|
{"reverse", no_argument, 0, 'R'},
|
|
{"silent", no_argument, 0, 's'},
|
|
{"strip", required_argument, 0, 'p'},
|
|
{"suffix", required_argument, 0, 'z'},
|
|
{"unified", no_argument, 0, 'u'},
|
|
{"version", no_argument, 0, 'v'},
|
|
{"version-control", required_argument, 0, 'V'},
|
|
{"posix", no_argument, &posix, 1},
|
|
{NULL, 0, 0, 0}
|
|
};
|
|
int ch;
|
|
|
|
rejname[0] = '\0';
|
|
Argc_last = Argc;
|
|
Argv_last = Argv;
|
|
if (!Argc)
|
|
return;
|
|
optreset = optind = 1;
|
|
while ((ch = getopt_long(Argc, Argv, options, longopts, NULL)) != -1) {
|
|
switch (ch) {
|
|
case 'b':
|
|
if (backup_type == none)
|
|
backup_type = numbered_existing;
|
|
if (optarg == NULL)
|
|
break;
|
|
if (verbose)
|
|
say("Warning, the ``-b suffix'' option has been"
|
|
" obsoleted by the -z option.\n");
|
|
/* FALLTHROUGH */
|
|
case 'z':
|
|
/* must directly follow 'b' case for backwards compat */
|
|
simple_backup_suffix = savestr(optarg);
|
|
break;
|
|
case 'B':
|
|
origprae = savestr(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] = savestr(optarg);
|
|
break;
|
|
case 'l':
|
|
canonicalize = true;
|
|
break;
|
|
case 'n':
|
|
diff_type = NORMAL_DIFF;
|
|
break;
|
|
case 'N':
|
|
noreverse = true;
|
|
break;
|
|
case 'o':
|
|
outname = savestr(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);
|
|
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] = savestr(*Argv++);
|
|
Argc--;
|
|
while (Argc > 0) {
|
|
if (++filec == MAXFILEC)
|
|
fatal("too many file arguments\n");
|
|
filearg[filec] = savestr(*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] [-x number] [-z backup-ext]\n"
|
|
" [--posix] [origfile [patchfile]]\n"
|
|
" patch <patchfile\n");
|
|
my_exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
/*
|
|
* 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 = strlen(line);
|
|
|
|
fprintf(rejfp, "%c%s", ch, line);
|
|
if (len == 0 || line[len-1] != '\n')
|
|
fprintf(rejfp, "\n\\ No newline at end of file\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;
|
|
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 */
|
|
}
|