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authorCem Keylan <cem@ckyln.com>2020-10-16 17:47:01 +0300
committerCem Keylan <cem@ckyln.com>2020-10-16 17:47:01 +0300
commit5d69c6a2661bba0a22f3ecfd517e2e9767a38346 (patch)
tree1f479b2714e127835db7f33a3bfed4c38c52f883 /usr.bin/patch/patch.c
parente2abcdca396661cbe0ae2ddb13d5c2b85682c13a (diff)
downloadotools-5d69c6a2661bba0a22f3ecfd517e2e9767a38346.tar.gz
add tools
Diffstat (limited to 'usr.bin/patch/patch.c')
-rw-r--r--usr.bin/patch/patch.c1064
1 files changed, 1064 insertions, 0 deletions
diff --git a/usr.bin/patch/patch.c b/usr.bin/patch/patch.c
new file mode 100644
index 0000000..088ea1f
--- /dev/null
+++ b/usr.bin/patch/patch.c
@@ -0,0 +1,1064 @@
+/* $OpenBSD: patch.c,v 1.69 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/cdefs.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <ctype.h>
+#include <getopt.h>
+#include <limits.h>
+#include <paths.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "common.h"
+#include "util.h"
+#include "pch.h"
+#include "inp.h"
+#include "backupfile.h"
+#include "ed.h"
+
+mode_t filemode = 0644;
+
+char *buf; /* general purpose buffer */
+size_t bufsz; /* general purpose buffer size */
+
+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 void 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 __dead 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[PATH_MAX];
+
+/* 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;
+
+ if (pledge("stdio rpath wpath cpath tmppath fattr", NULL) == -1) {
+ perror("pledge");
+ my_exit(2);
+ }
+
+ bufsz = INITLINELEN;
+ if ((buf = malloc(bufsz)) == NULL)
+ pfatal("allocating input buffer");
+ buf[0] = '\0';
+
+ setvbuf(stdout, NULL, _IOLBF, 0);
+ setvbuf(stderr, NULL, _IOLBF, 0);
+ for (i = 0; i < MAXFILEC; i++)
+ filearg[i] = NULL;
+
+ /* 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)) == -1)
+ pfatal("can't create %s", TMPOUTNAME);
+ close(fd);
+
+ if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1)
+ fatal("cannot allocate memory");
+ if ((fd = mkstemp(TMPINNAME)) == -1)
+ pfatal("can't create %s", TMPINNAME);
+ close(fd);
+
+ if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1)
+ fatal("cannot allocate memory");
+ if ((fd = mkstemp(TMPREJNAME)) == -1)
+ pfatal("can't create %s", TMPREJNAME);
+ close(fd);
+
+ if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1)
+ fatal("cannot allocate memory");
+ if ((fd = mkstemp(TMPPATNAME)) == -1)
+ 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 = xstrdup(filearg[0]);
+
+ /* 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]);
+
+ /* for ed script just up and do it and exit */
+ if (diff_type == ED_DIFF) {
+ do_ed_script();
+ continue;
+ }
+
+ /* 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 */
+ fclose(ofp);
+ 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();
+
+ /* 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);
+ }
+ }
+ }
+ fclose(rejfp);
+ 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'},
+ {"dry-run", no_argument, 0, 'C'},
+ {"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 = xstrdup(optarg);
+ break;
+ case 'B':
+ origprae = xstrdup(optarg);
+ break;
+ case 'c':
+ diff_type = CONTEXT_DIFF;
+ break;
+ case 'C':
+ check_only = true;
+ break;
+ case 'd':
+ if (chdir(optarg) == -1)
+ 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);
+ 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 __dead 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(2);
+}
+
+/*
+ * 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 void
+spew_output(void)
+{
+#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 */
+ fclose(ofp);
+ ofp = NULL;
+}
+
+/*
+ * 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))
+ return false; /* no corresponding whitespace */
+ 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 */
+}