/* patch - a program to apply diffs to original files */ /* $Id: patch.c,v 1.11 1997/04/14 05:32:30 eggert Exp $ */ /* Copyright 1984, 1985, 1986, 1987, 1988 Larry Wall Copyright 1989, 1990, 1991, 1992, 1993, 1997 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define XTERN #include #undef XTERN #define XTERN extern #include #include #include #include #include #include #include /* procedures */ static LINENUM locate_hunk PARAMS ((LINENUM, LINENUM)); static bool apply_hunk PARAMS ((bool *, LINENUM)); static bool copy_till PARAMS ((bool *, LINENUM)); static bool patch_match PARAMS ((LINENUM, LINENUM, LINENUM, LINENUM)); static bool similar PARAMS ((char const *, size_t, char const *, size_t)); static bool spew_output PARAMS ((bool *)); static char const *make_temp PARAMS ((int)); static int numeric_optarg PARAMS ((char const *)); static void abort_hunk PARAMS ((void)); static void cleanup PARAMS ((void)); static void get_some_switches PARAMS ((void)); static void init_output PARAMS ((char const *)); static void init_reject PARAMS ((char const *)); static void reinitialize_almost_everything PARAMS ((void)); static void usage PARAMS ((FILE *, int)) __attribute__((noreturn)); /* 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 backup; static bool noreverse; /* how many input lines have been irretractably output */ static LINENUM last_frozen_line; static char const *do_defines; /* symbol to patch using ifdef, ifndef, etc. */ static char const if_defined[] = "\n#ifdef %s\n"; static char const not_defined[] = "#ifndef %s\n"; static char const else_defined[] = "\n#else\n"; static char const end_defined[] = "\n#endif /* %s */\n"; static int Argc; static char * const *Argv; static FILE *ofp; /* output file pointer */ static FILE *rejfp; /* reject file pointer */ static char *output; static char const *patchname; static char *rejname; static char const * volatile TMPREJNAME; static LINENUM last_offset; static LINENUM maxfuzz = 2; static char serrbuf[BUFSIZ]; char const program_name[] = "patch"; /* Apply a set of diffs as appropriate. */ int main PARAMS ((int, char **)); int main(argc,argv) int argc; char **argv; { bool somefailed = FALSE; setbuf(stderr, serrbuf); bufsize = 8 * 1024; buf = xmalloc (bufsize); strippath = INT_MAX; { char const *v; v = getenv ("SIMPLE_BACKUP_SUFFIX"); if (v && *v) { simple_backup_suffix = v; backup = TRUE; } v = getenv ("VERSION_CONTROL"); if (v && *v) backup = TRUE; backup_type = get_version (v); /* OK to pass NULL. */ } /* parse switches */ Argc = argc; Argv = argv; get_some_switches(); /* Cons up the names of the global temporary files. */ TMPOUTNAME = make_temp ('o'); TMPINNAME = make_temp ('i'); TMPREJNAME = make_temp ('r'); TMPPATNAME = make_temp ('p'); if (output) init_output (output); /* Make sure we clean up in case of disaster. */ set_signals(0); for ( open_patch_file (patchname); there_is_another_patch(); reinitialize_almost_everything() ) { /* for each patch in patch file */ int hunk = 0; int failed = 0; char const *outname = output ? output : inname; if (!skip_rest_of_patch) get_input_file (inname, outname); if (diff_type == ED_DIFF) { if (! dry_run) do_ed_script (ofp); } else { int got_hunk; bool rev_okayed = FALSE; bool after_newline = TRUE; /* initialize the patched file */ if (!skip_rest_of_patch && !output) init_output(TMPOUTNAME); /* initialize reject file */ init_reject(TMPREJNAME); /* find out where all the lines are */ if (!skip_rest_of_patch) scan_input (inname); /* 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 */ while (0 < (got_hunk = another_hunk (diff_type))) { LINENUM where = 0; /* Pacify `gcc -Wall'. */ LINENUM newwhere; LINENUM fuzz = 0; LINENUM max_prefix_fuzz = pch_prefix_context (); LINENUM max_suffix_fuzz = pch_suffix_context (); hunk++; if (maxfuzz < max_prefix_fuzz) max_prefix_fuzz = maxfuzz; if (maxfuzz < max_suffix_fuzz) max_suffix_fuzz = maxfuzz; if (!skip_rest_of_patch) { do { LINENUM prefix_fuzz = fuzz < max_prefix_fuzz ? fuzz : max_prefix_fuzz; LINENUM suffix_fuzz = fuzz < max_suffix_fuzz ? fuzz : max_suffix_fuzz; where = locate_hunk (prefix_fuzz, suffix_fuzz); if (hunk == 1 && !where && !(force|rev_okayed)) { /* dwim for reversed patch? */ if (!pch_swap()) { if (!fuzz) say ( "Not enough memory to try swapped hunk! Assuming unswapped.\n"); continue; } reverse = !reverse; /* Try again. */ where = locate_hunk (prefix_fuzz, suffix_fuzz); if (!where) { /* didn't find it swapped */ if (!pch_swap()) /* put it back to normal */ fatal ("lost hunk on alloc error!"); reverse = !reverse; } else if (noreverse) { if (!pch_swap()) /* put it back to normal */ fatal ("lost hunk on alloc error!"); reverse = !reverse; say ( "Ignoring previously applied (or reversed) patch.\n"); skip_rest_of_patch = TRUE; } else if (batch) { if (verbosity != SILENT) say ( "%seversed (or previously applied) patch detected! %s -R.\n", 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') rev_okayed = TRUE; else skip_rest_of_patch = TRUE; where = 0; reverse = !reverse; if (!pch_swap()) /* put it back to normal */ fatal ("lost hunk on alloc error!"); } } } } while (!skip_rest_of_patch && !where && (++fuzz <= max_prefix_fuzz || fuzz <= max_suffix_fuzz)); if (skip_rest_of_patch) { /* just got decided */ if (ofp && !output) { fclose (ofp); ofp = 0; } } } newwhere = pch_newfirst() + last_offset; if (skip_rest_of_patch) { abort_hunk(); failed++; if (verbosity != SILENT) say ("Hunk #%d ignored at %ld.\n", hunk, newwhere); } else if (!where || (where == 1 && ok_to_create_file && input_lines)) { if (where) say ("\nPatch attempted to create file `%s', which already exists.\n", inname); abort_hunk(); failed++; if (verbosity != SILENT) say ("Hunk #%d FAILED at %ld.\n", hunk, newwhere); } else { if (! apply_hunk (&after_newline, where)) { abort_hunk (); failed++; if (verbosity != SILENT) say ("Hunk #%d FAILED at %ld.\n", hunk, newwhere); } else if (verbosity == VERBOSE) { say ("Hunk #%d succeeded at %ld", hunk, newwhere); if (fuzz) say (" with fuzz %ld", fuzz); if (last_offset) say (" (offset %ld line%s)", last_offset, last_offset==1?"":"s"); say (".\n"); } } } if (got_hunk < 0 && using_plan_a) { if (output) fatal ("out of memory using Plan A"); say ("\n\nRan out of memory using Plan A--trying again...\n\n"); if (ofp) { fclose (ofp); ofp = 0; } fclose (rejfp); continue; } assert(hunk); /* finish spewing out the new file */ if (!skip_rest_of_patch) skip_rest_of_patch = ! spew_output (&after_newline); } /* and put the output where desired */ ignore_signals (); if (!skip_rest_of_patch && !output) { struct stat statbuf; if (remove_empty_files && stat (TMPOUTNAME, &statbuf) == 0 && statbuf.st_size == 0) { if (verbosity == VERBOSE) say ("Removing %s (empty after patching).\n", outname); if (! dry_run) unlink (outname); } else { if (! dry_run) { move_file (TMPOUTNAME, outname, backup); chmod (outname, instat.st_mode); } } } if (diff_type != ED_DIFF) { if (fclose (rejfp) != 0) write_fatal (); if (failed) { somefailed = TRUE; say ("%d out of %d hunk%s %s", failed, hunk, "s" + (hunk == 1), skip_rest_of_patch ? "ignored" : "FAILED"); if (outname) { char *rej = rejname; if (!rejname) { rej = xmalloc (strlen (outname) + 5); strcpy (rej, outname); addext (rej, ".rej", '#'); } say ("--saving rejects to %s", rej); if (! dry_run) move_file (TMPREJNAME, rej, FALSE); if (!rejname) free (rej); } say ("\n"); } } set_signals (1); } if (ofp && (ferror (ofp) || fclose (ofp) != 0)) write_fatal (); cleanup (); if (somefailed) exit (1); return 0; } /* 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; if (inname) { free (inname); inname = 0; } last_offset = 0; diff_type = NO_DIFF; if (revision) { free(revision); revision = 0; } reverse = reverse_flag_specified; skip_rest_of_patch = FALSE; } static char const shortopts[] = "bB:cd:D:eEfF:i:lnNo:p:r:RstuvV:x:Y:z:"; static struct option const longopts[] = { {"backup", no_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'}, {"input", required_argument, NULL, 'i'}, {"ignore-whitespace", no_argument, NULL, 'l'}, {"normal", no_argument, NULL, 'n'}, {"forward", no_argument, NULL, 'N'}, {"output", required_argument, NULL, 'o'}, {"strip", required_argument, NULL, 'p'}, {"reject-file", required_argument, NULL, 'r'}, {"reverse", no_argument, NULL, 'R'}, {"quiet", no_argument, NULL, 's'}, {"silent", 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'}, {"basename-prefix", required_argument, NULL, 'Y'}, {"suffix", required_argument, NULL, 'z'}, {"dry-run", no_argument, NULL, 129}, {"verbose", no_argument, NULL, 130}, {NULL, no_argument, NULL, 0} }; static char const * const option_help[] = { "Input options:", "", " -p NUM --strip=NUM Strip NUM leading components from file names.", " -F LINES --fuzz LINES Set the fuzz factor to LINES for inexact matching.", " -l --ignore-whitespace Ignore white space changes between patch and input.", "", " -c --context Interpret the patch as a context difference.", " -e --ed Interpret the patch as an ed script.", " -n --normal Interpret the patch as a normal difference.", " -u --unified Interpret the patch as a unified difference.", "", " -N --forward Ignore patches that appear to be reversed or already applied.", " -R --reverse Assume patches were created with old and new files swapped.", "", " -i PATCHFILE --input=PATCHFILE Read patch from PATCHFILE instead of stdin.", "", "Output options:", "", " -o FILE --output=FILE Output patched files to FILE.", " -r FILE --reject-file=FILE Output rejects to FILE.", "", " -D NAME --ifdef=NAME Make merged if-then-else output using NAME.", " -E --remove-empty-files Remove output files that are empty after patching.", "", "Backup file options:", "", " -V STYLE --version-control=STYLE Use STYLE version control.", " STYLE is either 'simple', 'numbered', or 'existing'.", "", " -b --backup Save the original contents of each file F into F.orig.", " -B PREFIX --prefix=PREFIX Prepend PREFIX to backup file names.", " -Y PREFIX --basename-prefix=PREFIX Prepend PREFIX to backup file basenames.", " -z SUFFIX --suffix=SUFFIX Append SUFFIX to backup file names.", "", "Miscellaneous options:", "", " -t --batch Ask no questions; skip bad-Prereq patches; assume reversed.", " -f --force Like -t, but ignore bad-Prereq patches, and assume unreversed.", " -s --quiet --silent Work silently unless an error occurs.", " --verbose Output extra information about the work being done.", " --dry-run Do not actually change any files; just print what would happen.", "", " -d DIR --directory=DIR Change the working directory to DIR first.", "", " -v --version Output version info.", " --help Output this help.", 0 }; static void usage (stream, status) FILE *stream; int status; { char const * const *p; if (status != 0) { fprintf (stream, "%s: Try `%s --help' for more information.\n", program_name, Argv[0]); } else { fprintf (stream, "Usage: %s [OPTION]... [ORIGFILE [PATCHFILE]]\n\n", Argv[0]); for (p = option_help; *p; p++) fprintf (stream, "%s\n", *p); } exit (status); } /* Process switches and filenames. */ static void get_some_switches() { register int optc; if (rejname) free (rejname); rejname = 0; if (optind == Argc) return; while ((optc = getopt_long (Argc, Argv, shortopts, longopts, (int *) 0)) != -1) { switch (optc) { case 'b': /* Special hack for backward compatibility with CVS 1.9. If the last 4 args are `-b SUFFIX ORIGFILE PATCHFILE', treat `-b' as if it were `-z'. */ if (Argc - optind == 3 && strcmp (Argv[optind - 1], "-b") == 0 && ! (Argv[optind + 0][0] == '-' && Argv[optind + 0][1]) && ! (Argv[optind + 1][0] == '-' && Argv[optind + 1][1]) && ! (Argv[optind + 2][0] == '-' && Argv[optind + 2][1])) { optarg = Argv[optind++]; if (verbosity != SILENT) say ("warning: the `-b %s' option is obsolete; use `-z %s' instead\n", optarg, optarg); goto case_z; } backup = TRUE; backup_type = simple; break; case 'B': if (!*optarg) pfatal ("backup prefix is empty"); origprae = savestr (optarg); backup = TRUE; backup_type = simple; break; case 'c': diff_type = CONTEXT_DIFF; break; case 'd': if (chdir(optarg) < 0) pfatal ("can't cd to %s", optarg); break; case 'D': 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 = numeric_optarg ("fuzz factor"); break; case 'h': usage (stdout, 0); case 'i': patchname = savestr (optarg); break; case 'l': canonicalize = TRUE; break; case 'n': diff_type = NORMAL_DIFF; break; case 'N': noreverse = TRUE; break; case 'o': if (strcmp (optarg, "-") == 0) fatal ("cannot output patches to standard output"); output = savestr (optarg); break; case 'p': strippath = numeric_optarg ("strip count"); break; case 'r': rejname = savestr (optarg); break; case 'R': reverse = TRUE; reverse_flag_specified = TRUE; break; case 's': verbosity = SILENT; break; case 't': batch = TRUE; break; case 'u': diff_type = UNI_DIFF; break; case 'v': version(); exit (0); break; case 'V': backup = TRUE; backup_type = get_version (optarg); break; #if DEBUGGING case 'x': debug = numeric_optarg ("debugging option"); break; #endif case 'Y': if (!*optarg) pfatal ("backup basename prefix is empty"); origbase = savestr (optarg); backup = TRUE; backup_type = simple; break; case 'z': case_z: if (!*optarg) pfatal ("backup suffix is empty"); simple_backup_suffix = savestr (optarg); backup = TRUE; backup_type = simple; break; case 129: dry_run = TRUE; break; case 130: verbosity = VERBOSE; break; default: usage (stderr, 2); } } /* Process any filename args. */ if (optind < Argc) { inname = savestr (Argv[optind++]); if (optind < Argc) { patchname = savestr (Argv[optind++]); if (optind < Argc) { fprintf (stderr, "%s: extra operand `%s'\n", program_name, Argv[optind]); usage (stderr, 2); } } } } /* Handle a numeric option of type ARGTYPE_MSGID by converting optarg to a nonnegative integer, returning the result. */ static int numeric_optarg (argtype_msgid) char const *argtype_msgid; { int value = 0; char const *p = optarg; do { int v10 = value * 10; int digit = *p - '0'; if (9 < (unsigned) digit) fatal ("%s `%s' is not a number", argtype_msgid, optarg); if (v10 / 10 != value || v10 + digit < v10) fatal ("%s `%s' is too large", argtype_msgid, optarg); value = v10 + digit; } while (*++p); return value; } /* Attempt to find the right place to apply this hunk of patch. */ static LINENUM locate_hunk (prefix_fuzz, suffix_fuzz) LINENUM prefix_fuzz; LINENUM suffix_fuzz; { register LINENUM first_guess = pch_first () + last_offset; register LINENUM offset; LINENUM pat_lines = pch_ptrn_lines(); register LINENUM max_pos_offset = input_lines - first_guess - pat_lines + 1; register LINENUM max_neg_offset = first_guess - last_frozen_line - 1 + pch_prefix_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, prefix_fuzz, suffix_fuzz)) return first_guess; for (offset = 1; ; offset++) { register bool check_after = offset <= max_pos_offset; register bool check_before = offset <= max_neg_offset; if (check_after && patch_match (first_guess, offset, prefix_fuzz, suffix_fuzz)) { if (debug & 1) say ("Offset changing from %ld to %ld\n", last_offset, offset); last_offset = offset; return first_guess+offset; } else if (check_before && patch_match (first_guess, -offset, prefix_fuzz, suffix_fuzz)) { if (debug & 1) say ("Offset changing from %ld to %ld\n", last_offset, -offset); 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() { register LINENUM i; register 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 = (int) NEW_CONTEXT_DIFF <= (int) diff_type ? " ****" : ""; char const *minuses = (int) NEW_CONTEXT_DIFF <= (int) diff_type ? " ----" : " -----"; 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: fatal ("fatal internal error in abort_hunk"); } if (ferror (rejfp)) write_fatal (); } } /* We found where to apply it (we hope), so do it. */ static bool apply_hunk (after_newline, where) bool *after_newline; LINENUM where; { register LINENUM old = 1; register LINENUM lastline = pch_ptrn_lines (); register LINENUM new = lastline+1; register enum {OUTSIDE, IN_IFNDEF, IN_IFDEF, IN_ELSE} def_state = OUTSIDE; register char const *R_do_defines = do_defines; register LINENUM pat_end = pch_end (); register FILE *fp = ofp; where--; while (pch_char(new) == '=' || pch_char(new) == '\n') new++; while (old <= lastline) { if (pch_char(old) == '-') { assert (*after_newline); if (! copy_till (after_newline, where + old - 1)) return FALSE; if (R_do_defines) { if (def_state == OUTSIDE) { fprintf (fp, *after_newline + if_defined, R_do_defines); def_state = IN_IFNDEF; } else if (def_state == IN_IFDEF) { fprintf (fp, *after_newline + else_defined); def_state = IN_ELSE; } if (ferror (fp)) write_fatal (); *after_newline = pch_write_line (old, fp); } last_frozen_line++; old++; } else if (new > pat_end) { break; } else if (pch_char(new) == '+') { if (! copy_till (after_newline, where + old - 1)) return FALSE; if (R_do_defines) { if (def_state == IN_IFNDEF) { fprintf (fp, *after_newline + else_defined); def_state = IN_ELSE; } else if (def_state == OUTSIDE) { fprintf (fp, *after_newline + if_defined, R_do_defines); def_state = IN_IFDEF; } if (ferror (fp)) write_fatal (); } *after_newline = pch_write_line (new, fp); new++; } else if (pch_char(new) != pch_char(old)) { if (debug & 1) say ("oldchar = '%c', newchar = '%c'\n", pch_char (old), pch_char (new)); fatal ("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?", pch_hunk_beg() + old, pch_hunk_beg() + new); } else if (pch_char(new) == '!') { assert (*after_newline); if (! copy_till (after_newline, where + old - 1)) return FALSE; assert (*after_newline); if (R_do_defines) { fprintf (fp, not_defined, R_do_defines); if (ferror (fp)) write_fatal (); def_state = IN_IFNDEF; } do { if (R_do_defines) { *after_newline = pch_write_line (old, fp); } last_frozen_line++; old++; } while (pch_char (old) == '!'); if (R_do_defines) { fprintf (fp, *after_newline + else_defined); if (ferror (fp)) write_fatal (); def_state = IN_ELSE; } do { *after_newline = pch_write_line (new, fp); new++; } while (pch_char (new) == '!'); } else { assert(pch_char(new) == ' '); old++; new++; if (R_do_defines && def_state != OUTSIDE) { fprintf (fp, *after_newline + end_defined, R_do_defines); if (ferror (fp)) write_fatal (); *after_newline = TRUE; def_state = OUTSIDE; } } } if (new <= pat_end && pch_char(new) == '+') { if (! copy_till (after_newline, where + old - 1)) return FALSE; if (R_do_defines) { if (def_state == OUTSIDE) { fprintf (fp, *after_newline + if_defined, R_do_defines); def_state = IN_IFDEF; } else if (def_state == IN_IFNDEF) { fprintf (fp, *after_newline + else_defined); def_state = IN_ELSE; } if (ferror (fp)) write_fatal (); } do { if (!*after_newline && putc ('\n', fp) == EOF) write_fatal (); *after_newline = pch_write_line (new, fp); new++; } while (new <= pat_end && pch_char (new) == '+'); } if (R_do_defines && def_state != OUTSIDE) { fprintf (fp, *after_newline + end_defined, R_do_defines); if (ferror (fp)) write_fatal (); *after_newline = TRUE; } return TRUE; } /* Open the new file. */ static void init_output(name) char const *name; { ofp = fopen(name, "w"); if (! ofp) pfatal ("can't create %s", name); } /* Open a file to put hunks we can't locate. */ static void init_reject(name) char const *name; { rejfp = fopen(name, "w"); if (!rejfp) pfatal ("can't create %s", name); } /* Copy input file to output, up to wherever hunk is to be applied. */ static bool copy_till (after_newline, lastline) register bool *after_newline; register LINENUM lastline; { register LINENUM R_last_frozen_line = last_frozen_line; register FILE *fp = ofp; register char const *s; size_t size; if (R_last_frozen_line > lastline) { say ("misordered hunks! output would be garbled\n"); return FALSE; } while (R_last_frozen_line < lastline) { s = ifetch (++R_last_frozen_line, 0, &size); if (size) { if ((!*after_newline && putc ('\n', fp) == EOF) || ! fwrite (s, sizeof *s, size, fp)) write_fatal (); *after_newline = s[size - 1] == '\n'; } } last_frozen_line = R_last_frozen_line; return TRUE; } /* Finish copying the input file to the output file. */ static bool spew_output (after_newline) bool *after_newline; { if (debug & 256) say ("il=%ld lfl=%ld\n", input_lines, last_frozen_line); if (last_frozen_line < input_lines) if (! copy_till (after_newline, input_lines)) return FALSE; if (ofp && !output) { if (fclose (ofp) != 0) write_fatal (); ofp = 0; } return TRUE; } /* Does the patch pattern match at line base+offset? */ static bool patch_match (base, offset, prefix_fuzz, suffix_fuzz) LINENUM base; LINENUM offset; LINENUM prefix_fuzz; LINENUM suffix_fuzz; { register LINENUM pline = 1 + prefix_fuzz; register LINENUM iline; register LINENUM pat_lines = pch_ptrn_lines () - suffix_fuzz; size_t size; register char const *p; for (iline=base+offset+prefix_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) register char const *a; register size_t alen; register char const *b; register size_t blen; { /* Ignore presence or absence of trailing newlines. */ alen -= alen && a[alen - 1] == '\n'; blen -= blen && b[blen - 1] == '\n'; for (;;) { if (!blen || (*b == ' ' || *b == '\t')) { while (blen && (*b == ' ' || *b == '\t')) b++, blen--; if (alen) { if (!(*a == ' ' || *a == '\t')) return FALSE; do a++, alen--; while (alen && (*a == ' ' || *a == '\t')); } if (!alen || !blen) return alen == blen; } else if (!alen || *a++ != *b++) return FALSE; else alen--, blen--; } } /* Make a temporary file. */ #if HAVE_MKTEMP char *mktemp PARAMS ((char *)); #endif static char const * make_temp (letter) int letter; { char *r; #if HAVE_MKTEMP char const *tmpdir = getenv ("TMPDIR"); if (!tmpdir) tmpdir = "/tmp"; r = xmalloc (strlen (tmpdir) + 14); sprintf (r, "%s/patch%cXXXXXX", tmpdir, letter); mktemp (r); if (!*r) pfatal ("mktemp"); #else r = xmalloc (L_tmpnam); if (! (tmpnam (r) == r && *r)) pfatal ("tmpnam"); #endif return r; } /* Fatal exit with cleanup. */ void fatal_exit (sig) int sig; { cleanup (); if (sig) exit_with_signal (sig); exit (2); } static void cleanup () { unlink (TMPINNAME); unlink (TMPOUTNAME); unlink (TMPPATNAME); unlink (TMPREJNAME); }