mirror/patch
1
0
Fork 0
mirror of https://https.git.savannah.gnu.org/git/patch.git synced 2026-01-30 19:34:40 +00:00
Code Issues Packages Projects Releases Wiki Activity
patch/patch.c
Paul Eggert b667ffbc40 Remove lint.
2009-03-19 01:43:04 +01:00

979 lines
24 KiB
C
Raw Blame History

/* $Header: /home/agruen/git/patch-h/cvsroot/patch/patch.c,v 1.8 1993/07/30 02:02:51 eggert Exp $ */
/* patch - a program to apply diffs to original files
*
* Copyright 1986, Larry Wall
*
* This program may be copied as long as you don't try to make any
* money off of it, or pretend that you wrote it.
*
* $Log: patch.c,v $
* Revision 1.8 1993/07/30 02:02:51 eggert
* Remove lint.
*
* Revision 1.8 1993/07/30 02:02:51 eggert
* Remove lint.
*
* Revision 2.0.2.0 90/05/01 22:17:50 davison
* patch12u: unidiff support added
*
* Revision 2.0.1.6 88/06/22 20:46:39 lwall
* patch12: rindex() wasn't declared
*
* Revision 2.0.1.5 88/06/03 15:09:37 lwall
* patch10: exit code improved.
* patch10: better support for non-flexfilenames.
*
* Revision 2.0.1.4 87/02/16 14:00:04 lwall
* Short replacement caused spurious "Out of sync" message.
*
* Revision 2.0.1.3 87/01/30 22:45:50 lwall
* Improved diagnostic on sync error.
* Moved do_ed_script() to pch.c.
*
* Revision 2.0.1.2 86/11/21 09:39:15 lwall
* Fuzz factor caused offset of installed lines.
*
* Revision 2.0.1.1 86/10/29 13:10:22 lwall
* Backwards search could terminate prematurely.
*
* Revision 2.0 86/09/17 15:37:32 lwall
* Baseline for netwide release.
*
* Revision 1.5 86/08/01 20:53:24 lwall
* Changed some %d's to %ld's.
* Linted.
*
* Revision 1.4 86/08/01 19:17:29 lwall
* Fixes for machines that can't vararg.
* Added fuzz factor.
* Generalized -p.
* General cleanup.
*
* 85/08/15 van%ucbmonet@berkeley
* Changes for 4.3bsd diff -c.
*
* Revision 1.3 85/03/26 15:07:43 lwall
* Frozen.
*
* Revision 1.2.1.9 85/03/12 17:03:35 lwall
* Changed pfp->_file to fileno(pfp).
*
* Revision 1.2.1.8 85/03/12 16:30:43 lwall
* Check i_ptr and i_womp to make sure they aren't null before freeing.
* Also allow ed output to be suppressed.
*
* Revision 1.2.1.7 85/03/12 15:56:13 lwall
* Added -p option from jromine@uci-750a.
*
* Revision 1.2.1.6 85/03/12 12:12:51 lwall
* Now checks for normalness of file to patch.
*
* Revision 1.2.1.5 85/03/12 11:52:12 lwall
* Added -D (#ifdef) option from joe@fluke.
*
* Revision 1.2.1.4 84/12/06 11:14:15 lwall
* Made smarter about SCCS subdirectories.
*
* Revision 1.2.1.3 84/12/05 11:18:43 lwall
* Added -l switch to do loose string comparison.
*
* Revision 1.2.1.2 84/12/04 09:47:13 lwall
* Failed hunk count not reset on multiple patch file.
*
* Revision 1.2.1.1 84/12/04 09:42:37 lwall
* Branch for sdcrdcf changes.
*
* Revision 1.2 84/11/29 13:29:51 lwall
* Linted. Identifiers uniqified. Fixed i_ptr malloc() bug. Fixed
* multiple calls to mktemp(). Will now work on machines that can only
* read 32767 chars. Added -R option for diffs with new and old swapped.
* Various cosmetic changes.
*
* Revision 1.1 84/11/09 17:03:58 lwall
* Initial revision
*
*/
#include "INTERN.h"
#include "common.h"
#include "EXTERN.h"
#include "version.h"
#include "util.h"
#include "pch.h"
#include "inp.h"
#include "backupfile.h"
#include "getopt.h"
/* procedures */
static void reinitialize_almost_everything PARAMS((void));
static EXITING void usage PARAMS((FILE *, int));
static void get_some_switches PARAMS((void));
static LINENUM locate_hunk PARAMS((LINENUM));
static void abort_hunk PARAMS((void));
static void apply_hunk PARAMS((LINENUM));
static void init_output PARAMS((char *));
static void init_reject PARAMS((char *));
static void copy_till PARAMS((LINENUM, bool));
static void spew_output PARAMS((void));
static bool dump_line PARAMS((LINENUM));
static bool patch_match PARAMS((LINENUM, LINENUM, LINENUM));
static bool similar PARAMS((char const *, size_t, char const *, size_t));
static char *make_temp PARAMS((int));
/* TRUE if -E was specified on command line. */
static int remove_empty_files;
/* TRUE if -R was specified on command line. */
static int reverse_flag_specified;
static bool noreverse;
static char *do_defines; /* symbol to patch using ifdef, ifndef, etc. */
static char if_defined[] = "#ifdef %s\n";
static char not_defined[] = "#ifndef %s\n";
static char else_defined[] = "#else\n";
static char end_defined[] = "#endif /* %s */\n";
static int Argc;
static char **Argv;
static FILE *ofp; /* output file pointer */
static FILE *rejfp; /* reject file pointer */
static int optind_last; /* for restarting plan_b */
static char *rejname;
static LINENUM last_offset;
static LINENUM maxfuzz INIT(2);
static char serrbuf[BUFSIZ];
/* Apply a set of diffs as appropriate. */
int
main(argc,argv)
int argc;
char **argv;
{
LINENUM where = 0; /* Pacify `gcc -Wall'. */
LINENUM newwhere;
LINENUM fuzz;
LINENUM mymaxfuzz;
int hunk = 0;
int failed = 0;
int failtotal = 0;
bool rev_okayed = 0;
setbuf(stderr, serrbuf);
buf = xmalloc (bufsize);
/* Cons up the names of the temporary files. */
TMPOUTNAME = make_temp ('o');
TMPINNAME = make_temp ('i');
TMPREJNAME = make_temp ('r');
TMPPATNAME = make_temp ('p');
{
char *v;
v = getenv ("SIMPLE_BACKUP_SUFFIX");
if (v)
simple_backup_suffix = v;
#ifndef NODIR
v = getenv ("VERSION_CONTROL");
backup_type = get_version (v); /* OK to pass NULL. */
#endif
}
/* parse switches */
Argc = argc;
Argv = argv;
filearg = (char **) xmalloc (argc * sizeof (*filearg));
get_some_switches();
/* make sure we clean up /tmp in case of disaster */
set_signals(0);
for (
open_patch_file(filearg[1]);
there_is_another_patch();
reinitialize_almost_everything()
) { /* for each patch in patch file */
if (!outname)
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;
rev_okayed = FALSE;
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 && !(force|rev_okayed)) {
/* dwim for reversed patch? */
if (!pch_swap()) {
if (!fuzz)
say1(
"Not enough memory to try swapped hunk! Assuming unswapped.\n");
continue;
}
reverse = !reverse;
where = locate_hunk(fuzz); /* try again */
if (!where) { /* didn't find it swapped */
if (!pch_swap()) /* put it back to normal */
fatal1("lost hunk on alloc error!");
reverse = !reverse;
}
else if (noreverse) {
if (!pch_swap()) /* put it back to normal */
fatal1("lost hunk on alloc error!");
reverse = !reverse;
say1(
"Ignoring previously applied (or reversed) patch.\n");
skip_rest_of_patch = TRUE;
}
else if (batch) {
if (verbose)
say3(
"%seversed (or previously applied) patch detected! %s -R.",
reverse ? "R" : "Unr",
reverse ? "Assuming" : "Ignoring");
}
else {
ask3(
"%seversed (or previously applied) patch detected! %s -R? [y] ",
reverse ? "R" : "Unr",
reverse ? "Assume" : "Ignore");
if (*buf == 'n') {
ask1("Apply anyway? [n] ");
if (*buf == 'y')
rev_okayed = TRUE;
else
skip_rest_of_patch = TRUE;
where = 0;
reverse = !reverse;
if (!pch_swap()) /* put it back to normal */
fatal1("lost hunk on alloc error!");
}
}
}
} while (!skip_rest_of_patch && !where && ++fuzz <= mymaxfuzz);
if (skip_rest_of_patch) { /* just got decided */
Fclose(ofp);
ofp = 0;
}
}
newwhere = pch_newfirst() + last_offset;
if (skip_rest_of_patch) {
abort_hunk();
failed++;
if (verbose)
say3("Hunk #%d ignored at %ld.\n", hunk, newwhere);
}
else if (!where) {
abort_hunk();
failed++;
if (verbose)
say3("Hunk #%d failed at %ld.\n", hunk, newwhere);
}
else {
apply_hunk(where);
if (verbose) {
say3("Hunk #%d succeeded at %ld", hunk, newwhere);
if (fuzz)
say2(" with fuzz %ld", fuzz);
if (last_offset)
say3(" (offset %ld line%s)",
last_offset, last_offset==1?"":"s");
say1(".\n");
}
}
}
if (out_of_mem && using_plan_a) {
optind = optind_last;
say1("\n\nRan out of memory using Plan A--trying again...\n\n");
if (ofp)
Fclose(ofp);
ofp = 0;
if (rejfp)
Fclose(rejfp);
rejfp = 0;
continue;
}
assert(hunk);
/* 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 (move_file(TMPOUTNAME, outname) < 0) {
toutkeep = TRUE;
realout = TMPOUTNAME;
}
Chmod(realout, filestat.st_mode);
if (remove_empty_files && stat(realout, &statbuf) == 0
&& statbuf.st_size == 0) {
if (verbose)
say2("Removing %s (empty after patching).\n", realout);
while (unlink(realout) >= 0) ; /* while is for Eunice. */
}
}
if (fclose(rejfp) != 0)
write_fatal ();
rejfp = 0;
if (failed) {
failtotal += failed;
if (!rejname) {
rejname = xmalloc (strlen (outname) + 5);
Strcpy(rejname, outname);
addext(rejname, ".rej", '#');
}
if (skip_rest_of_patch) {
say4("%d out of %d hunks ignored--saving rejects to %s\n",
failed, hunk, rejname);
}
else {
say4("%d out of %d hunks failed--saving rejects to %s\n",
failed, hunk, rejname);
}
if (move_file(TMPREJNAME, rejname) < 0)
trejkeep = TRUE;
}
set_signals(1);
}
my_exit(failtotal);
}
/* Prepare to find the next patch to do in the patch file. */
static void
reinitialize_almost_everything()
{
re_patch();
re_input();
input_lines = 0;
last_frozen_line = 0;
filec = 0;
if (filearg[0] && !out_of_mem) {
free(filearg[0]);
filearg[0] = 0;
}
if (outname) {
free(outname);
outname = 0;
}
last_offset = 0;
diff_type = 0;
if (revision) {
free(revision);
revision = 0;
}
reverse = reverse_flag_specified;
skip_rest_of_patch = FALSE;
get_some_switches();
if (filec >= 2)
fatal1("you may not change to a different patch file");
}
static char const shortopts[] = "-b:B:cd:D:eEfF:lnNo:p::r:RsStuvV:x:";
static struct option const longopts[] =
{
{"suffix", required_argument, NULL, 'b'},
{"prefix", required_argument, NULL, 'B'},
{"context", no_argument, NULL, 'c'},
{"directory", required_argument, NULL, 'd'},
{"ifdef", required_argument, NULL, 'D'},
{"ed", no_argument, NULL, 'e'},
{"remove-empty-files", no_argument, NULL, 'E'},
{"force", no_argument, NULL, 'f'},
{"fuzz", required_argument, NULL, 'F'},
{"help", no_argument, NULL, 'h'},
{"ignore-whitespace", no_argument, NULL, 'l'},
{"normal", no_argument, NULL, 'n'},
{"forward", no_argument, NULL, 'N'},
{"output", required_argument, NULL, 'o'},
{"strip", optional_argument, NULL, 'p'},
{"reject-file", required_argument, NULL, 'r'},
{"reverse", no_argument, NULL, 'R'},
{"quiet", no_argument, NULL, 's'},
{"silent", no_argument, NULL, 's'},
{"skip", no_argument, NULL, 'S'},
{"batch", no_argument, NULL, 't'},
{"unified", no_argument, NULL, 'u'},
{"version", no_argument, NULL, 'v'},
{"version-control", required_argument, NULL, 'V'},
{"debug", required_argument, NULL, 'x'},
{NULL, no_argument, NULL, 0}
};
static EXITING void
usage (stream, status)
FILE *stream;
int status;
{
fprintf(stream, "\
Usage: %s [options] [origfile [patchfile]] [+ [options] [origfile]]...\n",
Argv[0]);
fprintf(stream, "\
Options:\n\
[-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\
[-D symbol] [-F max-fuzz] [-o out-file] [-p[strip-count]]\n\
[-r rej-name] [-V {numbered,existing,simple}] [--context]\n\
[--prefix=backup-prefix] [--suffix=backup-ext] [--ifdef=symbol]\n\
[--directory=directory] [--ed] [--fuzz=max-fuzz] [--force] [--batch]\n\
[--ignore-whitespace] [--forward] [--reverse] [--output=out-file]\n");
fprintf(stream, "\
[--strip[=strip-count]] [--normal] [--reject-file=rej-name] [--skip]\n\
[--remove-empty-files] [--quiet] [--silent] [--unified] [--version]\n\
[--version-control={numbered,existing,simple}] [--help]\n");
my_exit(status);
}
/* Process switches and filenames up to next '+' or end of list. */
static void
get_some_switches()
{
Reg1 int optc;
if (rejname)
free (rejname);
rejname = 0;
optind_last = optind;
if (optind == Argc)
return;
while ((optc = getopt_long (Argc, Argv, shortopts, longopts, (int *) 0))
!= -1) {
if (optc == 1) {
if (strEQ(optarg, "+"))
return;
filearg[filec++] = savestr(optarg);
filearg[filec] = 0;
}
else {
switch (optc) {
case 'b':
simple_backup_suffix = savestr(optarg);
break;
case 'B':
origprae = savestr(optarg);
break;
case 'c':
diff_type = CONTEXT_DIFF;
break;
case 'd':
if (chdir(optarg) < 0)
pfatal2("can't cd to %s", optarg);
break;
case 'D':
if (!isalpha(*optarg) && '_' != *optarg)
fatal1("argument to -D is not an identifier");
do_defines = savestr(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 'h':
usage (stdout, 0);
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':
if (optarg)
strippath = atoi(optarg);
else
strippath = 0;
break;
case 'r':
rejname = savestr (optarg);
break;
case 'R':
reverse = TRUE;
reverse_flag_specified = TRUE;
break;
case 's':
verbose = FALSE;
break;
case 'S':
skip_rest_of_patch = TRUE;
break;
case 't':
batch = TRUE;
break;
case 'u':
diff_type = UNI_DIFF;
break;
case 'v':
version();
my_exit(0);
break;
case 'V':
#ifndef NODIR
backup_type = get_version (optarg);
#endif
break;
#ifdef DEBUGGING
case 'x':
debug = atoi(optarg);
break;
#endif
default:
usage (stderr, 1);
}
}
}
/* Process any filename args given after "--". */
for (; optind < Argc; ++optind) {
filearg[filec++] = savestr(Argv[optind]);
}
filearg[filec] = 0;
}
/* Attempt to find the right place to apply this hunk of patch. */
static LINENUM
locate_hunk(fuzz)
LINENUM fuzz;
{
Reg1 LINENUM first_guess = pch_first() + last_offset;
Reg2 LINENUM offset;
LINENUM pat_lines = pch_ptrn_lines();
Reg3 LINENUM max_pos_offset = input_lines - first_guess
- pat_lines + 1;
Reg4 LINENUM max_neg_offset = first_guess - last_frozen_line - 1
+ pch_context();
if (!pat_lines) /* null range matches always */
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, (LINENUM) 0, fuzz))
return first_guess;
for (offset = 1; ; offset++) {
Reg5 bool check_after = (offset <= max_pos_offset);
Reg6 bool check_before = (offset <= max_neg_offset);
if (check_after && patch_match(first_guess, offset, fuzz)) {
#ifdef DEBUGGING
if (debug & 1)
say3("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)
say3("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_hunk()
{
Reg1 LINENUM i;
Reg2 LINENUM pat_end = pch_end();
/* add in last_offset to guess the same as the previous successful hunk */
LINENUM oldfirst = pch_first() + last_offset;
LINENUM newfirst = pch_newfirst() + last_offset;
LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1;
LINENUM newlast = newfirst + pch_repl_lines() - 1;
char const *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : "");
char const *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 ' ': case '-': case '+': case '!':
fprintf(rejfp, "%c ", pch_char(i));
/* fall into */
case '\n':
pch_write_line (i, rejfp);
break;
default:
fatal1("fatal internal error in abort_hunk");
}
}
}
/* We found where to apply it (we hope), so do it. */
static void
apply_hunk(where)
LINENUM where;
{
Reg1 LINENUM old = 1;
Reg2 LINENUM lastline = pch_ptrn_lines();
Reg3 LINENUM new = lastline+1;
#define OUTSIDE 0
#define IN_IFNDEF 1
#define IN_IFDEF 2
#define IN_ELSE 3
Reg4 int def_state = OUTSIDE;
Reg5 char *R_do_defines = do_defines;
Reg6 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, TRUE);
if (R_do_defines) {
if (def_state == OUTSIDE) {
fprintf(ofp, if_defined, R_do_defines);
def_state = IN_IFNDEF;
}
else if (def_state == IN_IFDEF) {
fprintf(ofp, else_defined);
def_state = IN_ELSE;
}
pch_write_line (old, ofp);
}
last_frozen_line++;
old++;
}
else if (new > pat_end) {
break;
}
else if (pch_char(new) == '+') {
copy_till(where + old - 1, TRUE);
if (R_do_defines) {
if (def_state == IN_IFNDEF) {
fprintf(ofp, else_defined);
def_state = IN_ELSE;
}
else if (def_state == OUTSIDE) {
fprintf(ofp, if_defined, R_do_defines);
def_state = IN_IFDEF;
}
}
pch_write_line (new, ofp);
new++;
}
else if (pch_char(new) != pch_char(old)) {
say3("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n",
pch_hunk_beg() + old,
pch_hunk_beg() + new);
#ifdef DEBUGGING
say3("oldchar = '%c', newchar = '%c'\n",
pch_char(old), pch_char(new));
#endif
my_exit(1);
}
else if (pch_char(new) == '!') {
copy_till(where + old - 1, TRUE);
if (R_do_defines) {
fprintf(ofp, not_defined, R_do_defines);
def_state = IN_IFNDEF;
}
while (pch_char(old) == '!') {
if (R_do_defines) {
pch_write_line (old, ofp);
}
last_frozen_line++;
old++;
}
if (R_do_defines) {
fprintf(ofp, else_defined);
def_state = IN_ELSE;
}
while (pch_char(new) == '!') {
pch_write_line (new, ofp);
new++;
}
}
else {
assert(pch_char(new) == ' ');
old++;
new++;
if (R_do_defines && def_state != OUTSIDE) {
fprintf(ofp, end_defined, R_do_defines);
def_state = OUTSIDE;
}
}
}
if (new <= pat_end && pch_char(new) == '+') {
copy_till(where + old - 1, TRUE);
if (R_do_defines) {
if (def_state == OUTSIDE) {
fprintf(ofp, if_defined, R_do_defines);
def_state = IN_IFDEF;
}
else if (def_state == IN_IFNDEF) {
fprintf(ofp, else_defined);
def_state = IN_ELSE;
}
}
while (new <= pat_end && pch_char(new) == '+') {
pch_write_line (new, ofp);
new++;
}
}
if (R_do_defines && def_state != OUTSIDE) {
fprintf(ofp, end_defined, R_do_defines);
}
}
/* Open the new file. */
static void
init_output(name)
char *name;
{
ofp = fopen(name, "w");
if (!ofp)
pfatal2("can't create %s", name);
}
/* Open a file to put hunks we can't locate. */
static void
init_reject(name)
char *name;
{
rejfp = fopen(name, "w");
if (!rejfp)
pfatal2("can't create %s", name);
}
/* Copy input file to output, up to wherever hunk is to be applied. */
static void
copy_till(lastline, newline_required)
Reg1 LINENUM lastline;
bool newline_required;
{
Reg2 LINENUM R_last_frozen_line = last_frozen_line;
Reg3 missing_newline = FALSE;
if (R_last_frozen_line > lastline)
fatal1("misordered hunks! output would be garbled");
while (R_last_frozen_line < lastline) {
missing_newline = dump_line (++R_last_frozen_line);
}
if (missing_newline & newline_required && putc('\n', ofp) == EOF)
write_fatal ();
last_frozen_line = R_last_frozen_line;
}
/* Finish copying the input file to the output file. */
static void
spew_output()
{
#ifdef DEBUGGING
if (debug & 256)
say3("il=%ld lfl=%ld\n",input_lines,last_frozen_line);
#endif
if (input_lines)
copy_till(input_lines, FALSE); /* dump remainder of file */
if (fclose(ofp) != 0)
write_fatal ();
ofp = 0;
}
/* Copy one line from input to output. */
static bool
dump_line(line)
LINENUM line;
{
size_t size;
char const *s = ifetch(line, 0, &size);
if (! fwrite(s, sizeof(*s), size, ofp))
write_fatal ();
return s[size - 1] != '\n';
}
/* Does the patch pattern match at line base+offset? */
static bool
patch_match(base, offset, fuzz)
LINENUM base;
LINENUM offset;
LINENUM fuzz;
{
Reg1 LINENUM pline = 1 + fuzz;
Reg2 LINENUM iline;
Reg3 LINENUM pat_lines = pch_ptrn_lines() - fuzz;
size_t size;
Reg4 char const *p;
for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) {
p = ifetch(iline, offset >= 0, &size);
if (canonicalize) {
if (!similar(p, size,
pfetch(pline),
pch_line_len(pline) ))
return FALSE;
}
else if (size != pch_line_len(pline)
|| memcmp(p, pfetch(pline), size) != 0)
return FALSE;
}
return TRUE;
}
/* Do two lines match with canonicalized white space? */
static bool
similar(a, alen, b, blen)
Reg1 char const *a;
Reg3 size_t alen;
Reg2 char const *b;
Reg4 size_t blen;
{
while (alen | blen) {
if (!blen || isspace(*b)) { /* whitespace (or line end) to match? */
if (alen && !isspace(*a)) /* no corresponding whitespace? */
return FALSE;
while (blen && isspace(*b))
b++, blen--; /* skip pattern whitespace */
while (alen && isspace(*a))
a++, alen--; /* skip target whitespace */
if (!alen || !blen)
return alen == blen; /* should end in sync */
}
else if (!alen || *a++ != *b++) /* match non-whitespace chars */
return FALSE;
else
alen--, blen--;
}
return TRUE; /* actually, this is not reached */
/* since there is always a \n */
}
/* Make a temporary file. */
static char *
make_temp (letter)
int letter;
{
char const *tmpdir = getenv ("TMPDIR");
char *r;
if (!tmpdir)
tmpdir = "/tmp";
r = xmalloc (strlen (tmpdir) + 14);
Sprintf (r, "%s/patch%cXXXXXX", tmpdir, letter);
(void) mktemp (r);
if (!*r)
pfatal1 ("mktemp");
return r;
}
/* Exit with cleanup. */
EXITING void
my_exit(status)
int status;
{
Unlink(TMPINNAME);
if (!toutkeep) {
Unlink(TMPOUTNAME);
}
if (!trejkeep) {
Unlink(TMPREJNAME);
}
Unlink(TMPPATNAME);
exit(status);
}
Reference in New Issue View Git Blame Copy Permalink