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1866 lines
46 KiB
C
1866 lines
46 KiB
C
/* reading patches */
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/* $Id: pch.c,v 1.26 1997/07/21 17:59:46 eggert Exp $ */
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/*
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Copyright 1986, 1987, 1988 Larry Wall
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Copyright 1990, 1991, 1992, 1993, 1997 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#define XTERN extern
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#include <common.h>
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#include <backupfile.h>
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#include <inp.h>
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#include <util.h>
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#undef XTERN
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#define XTERN
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#include <pch.h>
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#define INITHUNKMAX 125 /* initial dynamic allocation size */
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/* Patch (diff listing) abstract type. */
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static FILE *pfp; /* patch file pointer */
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static int p_says_nonexistent[2]; /* [0] for old file, [1] for new;
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value is 0 for nonempty, 1 for empty, 2 for nonexistent */
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static int p_rfc934_nesting; /* RFC 934 nesting level */
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static time_t p_timestamp[2]; /* timestamps in patch headers */
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static off_t p_filesize; /* size of the patch file */
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static LINENUM p_first; /* 1st line number */
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static LINENUM p_newfirst; /* 1st line number of replacement */
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static LINENUM p_ptrn_lines; /* # lines in pattern */
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static LINENUM p_repl_lines; /* # lines in replacement text */
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static LINENUM p_end = -1; /* last line in hunk */
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static LINENUM p_max; /* max allowed value of p_end */
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static LINENUM p_prefix_context; /* # of prefix context lines */
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static LINENUM p_suffix_context; /* # of suffix context lines */
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static LINENUM p_input_line; /* current line # from patch file */
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static char **p_line; /* the text of the hunk */
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static size_t *p_len; /* line length including \n if any */
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static char *p_Char; /* +, -, and ! */
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static LINENUM hunkmax = INITHUNKMAX; /* size of above arrays */
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static int p_indent; /* indent to patch */
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static file_offset p_base; /* where to intuit this time */
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static LINENUM p_bline; /* line # of p_base */
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static file_offset p_start; /* where intuit found a patch */
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static LINENUM p_sline; /* and the line number for it */
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static LINENUM p_hunk_beg; /* line number of current hunk */
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static LINENUM p_efake = -1; /* end of faked up lines--don't free */
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static LINENUM p_bfake = -1; /* beg of faked up lines */
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enum nametype { OLD, NEW, INDEX, NONE };
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static enum diff intuit_diff_type PARAMS ((void));
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static enum nametype best_name PARAMS ((char * const *, int const *));
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static int prefix_components PARAMS ((char *, int));
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static size_t pget_line PARAMS ((int, int));
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static size_t get_line PARAMS ((void));
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static bool incomplete_line PARAMS ((void));
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static bool grow_hunkmax PARAMS ((void));
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static void malformed PARAMS ((void)) __attribute__ ((noreturn));
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static void next_intuit_at PARAMS ((file_offset, LINENUM));
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static void skip_to PARAMS ((file_offset, LINENUM));
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/* Prepare to look for the next patch in the patch file. */
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void
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re_patch()
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{
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p_first = 0;
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p_newfirst = 0;
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p_ptrn_lines = 0;
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p_repl_lines = 0;
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p_end = -1;
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p_max = 0;
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p_indent = 0;
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}
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/* Open the patch file at the beginning of time. */
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void
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open_patch_file(filename)
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char const *filename;
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{
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file_offset file_pos = 0;
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struct stat st;
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if (!filename || !*filename || strEQ (filename, "-"))
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{
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file_offset stdin_pos;
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#if HAVE_SETMODE
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if (binary_transput)
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{
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if (isatty (STDIN_FILENO))
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fatal ("cannot read binary data from tty on this platform");
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setmode (STDIN_FILENO, O_BINARY);
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}
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#endif
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if (fstat (STDIN_FILENO, &st) != 0)
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pfatal ("fstat");
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if (S_ISREG (st.st_mode) && (stdin_pos = file_tell (stdin)) != -1)
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{
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pfp = stdin;
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file_pos = stdin_pos;
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}
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else
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{
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size_t charsread;
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pfp = fopen (TMPPATNAME, "w+b");
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if (!pfp)
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pfatal ("can't create `%s'", TMPPATNAME);
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for (st.st_size = 0;
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(charsread = fread (buf, 1, bufsize, stdin)) != 0;
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st.st_size += charsread)
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if (fwrite (buf, 1, charsread, pfp) != charsread)
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write_fatal ();
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if (ferror (stdin) || fclose (stdin) != 0)
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read_fatal ();
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if (fflush (pfp) != 0
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|| file_seek (pfp, (file_offset) 0, SEEK_SET) != 0)
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write_fatal ();
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}
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}
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else
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{
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pfp = fopen (filename, binary_transput ? "rb" : "r");
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if (!pfp)
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pfatal ("can't open patch file `%s'", filename);
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if (fstat (fileno (pfp), &st) != 0)
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pfatal ("fstat");
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}
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p_filesize = st.st_size;
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if (p_filesize != (file_offset) p_filesize)
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fatal ("patch file is too long");
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next_intuit_at (file_pos, (LINENUM) 1);
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set_hunkmax();
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}
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/* Make sure our dynamically realloced tables are malloced to begin with. */
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void
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set_hunkmax()
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{
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if (!p_line)
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p_line = (char **) malloc (hunkmax * sizeof *p_line);
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if (!p_len)
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p_len = (size_t *) malloc (hunkmax * sizeof *p_len);
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if (!p_Char)
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p_Char = malloc (hunkmax * sizeof *p_Char);
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}
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/* Enlarge the arrays containing the current hunk of patch. */
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static bool
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grow_hunkmax()
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{
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hunkmax *= 2;
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assert (p_line && p_len && p_Char);
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if ((p_line = (char **) realloc (p_line, hunkmax * sizeof (*p_line)))
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&& (p_len = (size_t *) realloc (p_len, hunkmax * sizeof (*p_len)))
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&& (p_Char = realloc (p_Char, hunkmax * sizeof (*p_Char))))
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return TRUE;
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if (!using_plan_a)
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memory_fatal ();
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/* Don't free previous values of p_line etc.,
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since some broken implementations free them for us.
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Whatever is null will be allocated again from within plan_a (),
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of all places. */
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return FALSE;
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}
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/* True if the remainder of the patch file contains a diff of some sort. */
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bool
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there_is_another_patch()
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{
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if (p_base != 0 && p_base >= p_filesize) {
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if (verbosity == VERBOSE)
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say ("done\n");
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return FALSE;
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}
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if (verbosity == VERBOSE)
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say ("Hmm...");
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diff_type = intuit_diff_type();
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if (diff_type == NO_DIFF) {
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if (verbosity == VERBOSE)
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say (p_base
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? " Ignoring the trailing garbage.\ndone\n"
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: " I can't seem to find a patch in there anywhere.\n");
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if (! p_base && p_filesize)
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fatal ("Only garbage was found in the patch input.");
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return FALSE;
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}
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if (skip_rest_of_patch)
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{
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Fseek (pfp, p_start, SEEK_SET);
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p_input_line = p_sline - 1;
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return TRUE;
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}
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if (verbosity == VERBOSE)
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say (" %sooks like %s to me...\n",
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(p_base == 0 ? "L" : "The next patch l"),
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diff_type == UNI_DIFF ? "a unified diff" :
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diff_type == CONTEXT_DIFF ? "a context diff" :
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diff_type == NEW_CONTEXT_DIFF ? "a new-style context diff" :
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diff_type == NORMAL_DIFF ? "a normal diff" :
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"an ed script" );
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if (verbosity != SILENT)
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{
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if (p_indent)
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say ("(Patch is indented %d space%s.)\n", p_indent, p_indent==1?"":"s");
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if (! inname)
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{
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say ("can't find file to patch at input line %ld\n",
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p_sline);
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say (strippath == INT_MAX
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? "Perhaps you should have used the -p or --strip option?\n"
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: "Perhaps you used the wrong -p or --strip option?\n");
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}
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}
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skip_to(p_start,p_sline);
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while (!inname) {
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if (force || batch) {
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say ("No file to patch. Skipping patch.\n");
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skip_rest_of_patch = TRUE;
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return TRUE;
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}
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ask ("File to patch: ");
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inname = fetchname (buf, 0, (time_t *) 0);
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if (inname)
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{
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if (stat (inname, &instat) == 0)
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{
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inerrno = 0;
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invc = -1;
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}
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else
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{
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perror (inname);
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free (inname);
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inname = 0;
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}
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}
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if (!inname) {
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ask ("Skip this patch? [y] ");
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if (*buf != 'n') {
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if (verbosity != SILENT)
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say ("Skipping patch.\n");
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skip_rest_of_patch = TRUE;
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return TRUE;
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}
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}
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}
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return TRUE;
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}
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/* Determine what kind of diff is in the remaining part of the patch file. */
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static enum diff
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intuit_diff_type()
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{
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register char *s;
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register char *t;
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register int indent;
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register file_offset this_line = 0;
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register file_offset previous_line;
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register file_offset first_command_line = -1;
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LINENUM fcl_line = 0; /* Pacify `gcc -W'. */
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register bool last_line_was_command = FALSE;
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register bool this_is_a_command = FALSE;
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register bool stars_last_line = FALSE;
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register bool stars_this_line = FALSE;
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enum nametype i;
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char *name[3];
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struct stat st[3];
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int stat_errno[3];
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int version_controlled[3];
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register enum diff retval;
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name[OLD] = name[NEW] = name[INDEX] = 0;
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version_controlled[OLD] = -1;
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version_controlled[NEW] = -1;
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version_controlled[INDEX] = -1;
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p_rfc934_nesting = 0;
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p_timestamp[OLD] = p_timestamp[NEW] = (time_t) -1;
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p_says_nonexistent[OLD] = p_says_nonexistent[NEW] = 0;
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Fseek (pfp, p_base, SEEK_SET);
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p_input_line = p_bline - 1;
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for (;;) {
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previous_line = this_line;
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last_line_was_command = this_is_a_command;
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stars_last_line = stars_this_line;
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this_line = file_tell (pfp);
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indent = 0;
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if (! pget_line (0, 0)) {
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if (first_command_line >= 0) {
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/* nothing but deletes!? */
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p_start = first_command_line;
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p_sline = fcl_line;
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retval = ED_DIFF;
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goto scan_exit;
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}
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else {
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p_start = this_line;
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p_sline = p_input_line;
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return NO_DIFF;
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}
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}
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for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) {
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if (*s == '\t')
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indent = (indent + 8) & ~7;
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else
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indent++;
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}
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for (t = s; ISDIGIT (*t) || *t == ','; t++)
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continue;
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this_is_a_command = (ISDIGIT (*s) &&
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(*t == 'd' || *t == 'c' || *t == 'a') );
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if (first_command_line < 0 && this_is_a_command) {
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first_command_line = this_line;
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fcl_line = p_input_line;
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p_indent = indent; /* assume this for now */
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}
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if (!stars_last_line && strnEQ(s, "*** ", 4))
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name[OLD] = fetchname (s+4, strippath, &p_timestamp[OLD]);
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else if (strnEQ(s, "+++ ", 4))
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/* Swap with NEW below. */
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name[OLD] = fetchname (s+4, strippath, &p_timestamp[OLD]);
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else if (strnEQ(s, "Index:", 6))
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name[INDEX] = fetchname (s+6, strippath, (time_t *) 0);
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else if (strnEQ(s, "Prereq:", 7)) {
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for (t = s + 7; ISSPACE ((unsigned char) *t); t++)
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continue;
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revision = t;
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for (t = revision; *t && !ISSPACE ((unsigned char) *t); t++)
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continue;
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if (t == revision)
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revision = 0;
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else {
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char oldc = *t;
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*t = '\0';
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revision = savestr (revision);
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*t = oldc;
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}
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} else
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{
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for (t = s; t[0] == '-' && t[1] == ' '; t += 2)
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continue;
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if (strnEQ(t, "--- ", 4))
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{
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time_t timestamp = (time_t) -1;
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name[NEW] = fetchname (t+4, strippath, ×tamp);
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if (timestamp != (time_t) -1)
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{
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p_timestamp[NEW] = timestamp;
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p_rfc934_nesting = (t - s) >> 1;
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}
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}
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}
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if ((diff_type == NO_DIFF || diff_type == ED_DIFF) &&
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first_command_line >= 0 &&
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strEQ(s, ".\n") ) {
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p_indent = indent;
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p_start = first_command_line;
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p_sline = fcl_line;
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retval = ED_DIFF;
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goto scan_exit;
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}
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if ((diff_type == NO_DIFF || diff_type == UNI_DIFF)
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&& strnEQ(s, "@@ -", 4)) {
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/* `name' and `p_timestamp' are backwards; swap them. */
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time_t ti = p_timestamp[OLD];
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p_timestamp[OLD] = p_timestamp[NEW];
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p_timestamp[NEW] = ti;
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t = name[OLD];
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name[OLD] = name[NEW];
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name[NEW] = t;
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|
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s += 4;
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if (! atol (s))
|
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p_says_nonexistent[OLD] = 1 + ! p_timestamp[OLD];
|
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while (*s != ' ' && *s != '\n')
|
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s++;
|
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while (*s == ' ')
|
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s++;
|
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if (! atol (s))
|
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p_says_nonexistent[NEW] = 1 + ! p_timestamp[NEW];
|
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p_indent = indent;
|
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p_start = this_line;
|
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p_sline = p_input_line;
|
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retval = UNI_DIFF;
|
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if (! ((name[OLD] || ! p_timestamp[OLD])
|
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&& (name[NEW] || ! p_timestamp[NEW])))
|
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say ("missing header for unified diff at line %ld of patch\n",
|
|
p_sline);
|
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goto scan_exit;
|
|
}
|
|
stars_this_line = strnEQ(s, "********", 8);
|
|
if ((diff_type == NO_DIFF
|
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|| diff_type == CONTEXT_DIFF
|
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|| diff_type == NEW_CONTEXT_DIFF)
|
|
&& stars_last_line && strnEQ (s, "*** ", 4)) {
|
|
s += 4;
|
|
if (! atol (s))
|
|
p_says_nonexistent[OLD] = 1 + ! p_timestamp[OLD];
|
|
/* if this is a new context diff the character just before */
|
|
/* the newline is a '*'. */
|
|
while (*s != '\n')
|
|
s++;
|
|
p_indent = indent;
|
|
p_start = previous_line;
|
|
p_sline = p_input_line - 1;
|
|
retval = (*(s-1) == '*' ? NEW_CONTEXT_DIFF : CONTEXT_DIFF);
|
|
|
|
{
|
|
/* Scan the first hunk to see whether the file contents
|
|
appear to have been deleted. */
|
|
file_offset saved_p_base = p_base;
|
|
LINENUM saved_p_bline = p_bline;
|
|
Fseek (pfp, previous_line, SEEK_SET);
|
|
p_input_line -= 2;
|
|
if (another_hunk (retval, 0)
|
|
&& ! p_repl_lines && p_newfirst == 1)
|
|
p_says_nonexistent[NEW] = 1 + ! p_timestamp[NEW];
|
|
next_intuit_at (saved_p_base, saved_p_bline);
|
|
}
|
|
|
|
if (! ((name[OLD] || ! p_timestamp[OLD])
|
|
&& (name[NEW] || ! p_timestamp[NEW])))
|
|
say ("missing header for context diff at line %ld of patch\n",
|
|
p_sline);
|
|
goto scan_exit;
|
|
}
|
|
if ((diff_type == NO_DIFF || diff_type == NORMAL_DIFF) &&
|
|
last_line_was_command &&
|
|
(strnEQ(s, "< ", 2) || strnEQ(s, "> ", 2)) ) {
|
|
p_start = previous_line;
|
|
p_sline = p_input_line - 1;
|
|
p_indent = indent;
|
|
retval = NORMAL_DIFF;
|
|
goto scan_exit;
|
|
}
|
|
}
|
|
|
|
scan_exit:
|
|
|
|
/* To intuit `inname', the name of the file to patch,
|
|
use the algorithm specified by POSIX 1003.2b/D11 section 5.22.7.2
|
|
(with some modifications if posixly_correct is zero):
|
|
|
|
- Take the old and new names from the context header if present,
|
|
and take the index name from the `Index:' line if present and
|
|
if either the old and new names are both absent
|
|
or posixly_correct is nonzero.
|
|
Consider the file names to be in the order (old, new, index).
|
|
- If some named files exist, use the first one if posixly_correct
|
|
is nonzero, the best one otherwise.
|
|
- If patch_get is nonzero, and no named files exist,
|
|
but an RCS or SCCS master file exists,
|
|
use the first named file with an RCS or SCCS master.
|
|
- If no named files exist, no RCS or SCCS master was found,
|
|
some names are given, posixly_correct is zero,
|
|
and the patch appears to create a file, then use the best name
|
|
requiring the creation of the fewest directories.
|
|
- Otherwise, report failure by setting `inname' to 0;
|
|
this causes our invoker to ask the user for a file name. */
|
|
|
|
i = NONE;
|
|
|
|
if (!inname)
|
|
{
|
|
enum nametype i0 = NONE;
|
|
|
|
if (! posixly_correct && (name[OLD] || name[NEW]) && name[INDEX])
|
|
{
|
|
free (name[INDEX]);
|
|
name[INDEX] = 0;
|
|
}
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i])
|
|
{
|
|
if (i0 != NONE && strcmp (name[i0], name[i]) == 0)
|
|
{
|
|
/* It's the same name as before; reuse stat results. */
|
|
stat_errno[i] = stat_errno[i0];
|
|
if (! stat_errno[i])
|
|
st[i] = st[i0];
|
|
}
|
|
else if (stat (name[i], &st[i]) != 0)
|
|
stat_errno[i] = errno;
|
|
else
|
|
{
|
|
stat_errno[i] = 0;
|
|
if (posixly_correct)
|
|
break;
|
|
}
|
|
i0 = i;
|
|
}
|
|
|
|
if (! posixly_correct)
|
|
{
|
|
i = best_name (name, stat_errno);
|
|
|
|
if (i == NONE && patch_get)
|
|
{
|
|
enum nametype nope = NONE;
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i])
|
|
{
|
|
char const *cs;
|
|
char *getbuf;
|
|
char *diffbuf;
|
|
int readonly = outfile && strcmp (outfile, name[i]) != 0;
|
|
|
|
if (nope == NONE || strcmp (name[nope], name[i]) != 0)
|
|
{
|
|
cs = (version_controller
|
|
(name[i], readonly, (struct stat *) 0,
|
|
&getbuf, &diffbuf));
|
|
version_controlled[i] = !! cs;
|
|
if (cs)
|
|
{
|
|
if (version_get (name[i], cs, 0, readonly,
|
|
getbuf, &st[i]))
|
|
stat_errno[i] = 0;
|
|
else
|
|
version_controlled[i] = 0;
|
|
|
|
free (getbuf);
|
|
free (diffbuf);
|
|
|
|
if (! stat_errno[i])
|
|
break;
|
|
}
|
|
}
|
|
|
|
nope = i;
|
|
}
|
|
}
|
|
|
|
if (p_says_nonexistent[reverse ^ (i == NONE || st[i].st_size == 0)])
|
|
{
|
|
assert (i0 != NONE);
|
|
if (ok_to_reverse
|
|
("The next patch%s would %s the file `%s',\nwhich %s!",
|
|
reverse ? ", when reversed," : "",
|
|
(i == NONE ? "delete"
|
|
: st[i].st_size == 0 ? "empty out"
|
|
: "create"),
|
|
name[i == NONE || st[i].st_size == 0 ? i0 : i],
|
|
(i == NONE ? "does not exist"
|
|
: st[i].st_size == 0 ? "is already empty"
|
|
: "already exists")))
|
|
reverse ^= 1;
|
|
}
|
|
|
|
if (i == NONE && p_says_nonexistent[reverse])
|
|
{
|
|
int newdirs[3];
|
|
int newdirs_min = INT_MAX;
|
|
int distance_from_minimum[3];
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i])
|
|
{
|
|
newdirs[i] = (prefix_components (name[i], 0)
|
|
- prefix_components (name[i], 1));
|
|
if (newdirs[i] < newdirs_min)
|
|
newdirs_min = newdirs[i];
|
|
}
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i])
|
|
distance_from_minimum[i] = newdirs[i] - newdirs_min;
|
|
|
|
i = best_name (name, distance_from_minimum);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (i == NONE)
|
|
inerrno = -1;
|
|
else
|
|
{
|
|
inname = name[i];
|
|
name[i] = 0;
|
|
inerrno = stat_errno[i];
|
|
invc = version_controlled[i];
|
|
instat = st[i];
|
|
}
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i])
|
|
free (name[i]);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Count the path name components in FILENAME's prefix.
|
|
If CHECKDIRS is nonzero, count only existing directories. */
|
|
static int
|
|
prefix_components (filename, checkdirs)
|
|
char *filename;
|
|
int checkdirs;
|
|
{
|
|
int count = 0;
|
|
struct stat stat_buf;
|
|
int stat_result;
|
|
char *f = filename + FILESYSTEM_PREFIX_LEN (filename);
|
|
|
|
if (*f)
|
|
while (*++f)
|
|
if (ISSLASH (f[0]) && ! ISSLASH (f[-1]))
|
|
{
|
|
if (checkdirs)
|
|
{
|
|
*f = '\0';
|
|
stat_result = stat (filename, &stat_buf);
|
|
*f = '/';
|
|
if (! (stat_result == 0 && S_ISDIR (stat_buf.st_mode)))
|
|
break;
|
|
}
|
|
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/* Return the index of the best of NAME[OLD], NAME[NEW], and NAME[INDEX].
|
|
Ignore null names, and ignore NAME[i] if IGNORE[i] is nonzero.
|
|
Return NONE if all names are ignored. */
|
|
static enum nametype
|
|
best_name (name, ignore)
|
|
char *const *name;
|
|
int const *ignore;
|
|
{
|
|
enum nametype i;
|
|
int components[3];
|
|
int components_min = INT_MAX;
|
|
size_t basename_len[3];
|
|
size_t basename_len_min = (size_t) -1;
|
|
size_t len[3];
|
|
size_t len_min = (size_t) -1;
|
|
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i] && !ignore[i])
|
|
{
|
|
/* Take the names with the fewest prefix components. */
|
|
components[i] = prefix_components (name[i], 0);
|
|
if (components_min < components[i])
|
|
continue;
|
|
components_min = components[i];
|
|
|
|
/* Of those, take the names with the shortest basename. */
|
|
basename_len[i] = strlen (base_name (name[i]));
|
|
if (basename_len_min < basename_len[i])
|
|
continue;
|
|
basename_len_min = basename_len[i];
|
|
|
|
/* Of those, take the shortest names. */
|
|
len[i] = strlen (name[i]);
|
|
if (len_min < len[i])
|
|
continue;
|
|
len_min = len[i];
|
|
}
|
|
|
|
/* Of those, take the first name. */
|
|
for (i = OLD; i <= INDEX; i++)
|
|
if (name[i] && !ignore[i]
|
|
&& components[i] == components_min
|
|
&& basename_len[i] == basename_len_min
|
|
&& len[i] == len_min)
|
|
break;
|
|
|
|
return i;
|
|
}
|
|
|
|
/* Remember where this patch ends so we know where to start up again. */
|
|
|
|
static void
|
|
next_intuit_at(file_pos,file_line)
|
|
file_offset file_pos;
|
|
LINENUM file_line;
|
|
{
|
|
p_base = file_pos;
|
|
p_bline = file_line;
|
|
}
|
|
|
|
/* Basically a verbose fseek() to the actual diff listing. */
|
|
|
|
static void
|
|
skip_to(file_pos,file_line)
|
|
file_offset file_pos;
|
|
LINENUM file_line;
|
|
{
|
|
register FILE *i = pfp;
|
|
register FILE *o = stdout;
|
|
register int c;
|
|
|
|
assert(p_base <= file_pos);
|
|
if ((verbosity == VERBOSE || !inname) && p_base < file_pos) {
|
|
Fseek (i, p_base, SEEK_SET);
|
|
say ("The text leading up to this was:\n--------------------------\n");
|
|
|
|
while (file_tell (i) < file_pos)
|
|
{
|
|
putc ('|', o);
|
|
do
|
|
{
|
|
if ((c = getc (i)) == EOF)
|
|
read_fatal ();
|
|
putc (c, o);
|
|
}
|
|
while (c != '\n');
|
|
}
|
|
|
|
say ("--------------------------\n");
|
|
}
|
|
else
|
|
Fseek (i, file_pos, SEEK_SET);
|
|
p_input_line = file_line - 1;
|
|
}
|
|
|
|
/* Make this a function for better debugging. */
|
|
static void
|
|
malformed ()
|
|
{
|
|
fatal ("malformed patch at line %ld: %s", p_input_line, buf);
|
|
/* about as informative as "Syntax error" in C */
|
|
}
|
|
|
|
/* 1 if there is more of the current diff listing to process;
|
|
0 if not; -1 if ran out of memory. */
|
|
|
|
int
|
|
another_hunk (difftype, rev)
|
|
enum diff difftype;
|
|
int rev;
|
|
{
|
|
register char *s;
|
|
register LINENUM context = 0;
|
|
register size_t chars_read;
|
|
|
|
while (p_end >= 0) {
|
|
if (p_end == p_efake)
|
|
p_end = p_bfake; /* don't free twice */
|
|
else
|
|
free(p_line[p_end]);
|
|
p_end--;
|
|
}
|
|
assert(p_end == -1);
|
|
p_efake = -1;
|
|
|
|
p_max = hunkmax; /* gets reduced when --- found */
|
|
if (difftype == CONTEXT_DIFF || difftype == NEW_CONTEXT_DIFF) {
|
|
file_offset line_beginning = file_tell (pfp);
|
|
/* file pos of the current line */
|
|
LINENUM repl_beginning = 0; /* index of --- line */
|
|
register LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */
|
|
register LINENUM fillsrc; /* index of first line to copy */
|
|
register LINENUM filldst; /* index of first missing line */
|
|
bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */
|
|
bool some_context = FALSE; /* (perhaps internal) context seen */
|
|
register bool repl_could_be_missing = TRUE;
|
|
bool repl_missing = FALSE; /* we are now backtracking */
|
|
file_offset repl_backtrack_position = 0;
|
|
/* file pos of first repl line */
|
|
LINENUM repl_patch_line; /* input line number for same */
|
|
LINENUM repl_context; /* context for same */
|
|
LINENUM ptrn_prefix_context = -1; /* lines in pattern prefix context */
|
|
LINENUM ptrn_suffix_context = -1; /* lines in pattern suffix context */
|
|
LINENUM repl_prefix_context = -1; /* lines in replac. prefix context */
|
|
register LINENUM ptrn_copiable = 0;
|
|
/* # of copiable lines in ptrn */
|
|
|
|
/* Pacify `gcc -Wall'. */
|
|
fillsrc = filldst = repl_patch_line = repl_context = 0;
|
|
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1
|
|
|| chars_read <= 8
|
|
|| strncmp (buf, "********", 8) != 0) {
|
|
next_intuit_at(line_beginning,p_input_line);
|
|
return chars_read == (size_t) -1 ? -1 : 0;
|
|
}
|
|
p_hunk_beg = p_input_line + 1;
|
|
while (p_end < p_max) {
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1)
|
|
return -1;
|
|
if (!chars_read) {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
if (p_max - p_end < 4) {
|
|
strcpy (buf, " \n"); /* assume blank lines got chopped */
|
|
chars_read = 3;
|
|
} else {
|
|
fatal ("unexpected end of file in patch");
|
|
}
|
|
}
|
|
p_end++;
|
|
if (p_end == hunkmax)
|
|
fatal ("unterminated hunk starting at line %ld; giving up at line %ld: %s",
|
|
pch_hunk_beg (), p_input_line, buf);
|
|
assert(p_end < hunkmax);
|
|
p_Char[p_end] = *buf;
|
|
p_len[p_end] = 0;
|
|
p_line[p_end] = 0;
|
|
switch (*buf) {
|
|
case '*':
|
|
if (strnEQ(buf, "********", 8)) {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
else
|
|
fatal ("unexpected end of hunk at line %ld",
|
|
p_input_line);
|
|
}
|
|
if (p_end != 0) {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
fatal ("unexpected `***' at line %ld: %s",
|
|
p_input_line, buf);
|
|
}
|
|
context = 0;
|
|
p_len[p_end] = strlen (buf);
|
|
if (! (p_line[p_end] = savestr (buf))) {
|
|
p_end--;
|
|
return -1;
|
|
}
|
|
for (s = buf; *s && !ISDIGIT (*s); s++)
|
|
continue;
|
|
if (!*s)
|
|
malformed ();
|
|
if (strnEQ(s,"0,0",3))
|
|
remove_prefix (s, 2);
|
|
p_first = (LINENUM) atol(s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
if (*s == ',') {
|
|
while (*s && !ISDIGIT (*s))
|
|
s++;
|
|
if (!*s)
|
|
malformed ();
|
|
p_ptrn_lines = ((LINENUM)atol(s)) - p_first + 1;
|
|
}
|
|
else if (p_first)
|
|
p_ptrn_lines = 1;
|
|
else {
|
|
p_ptrn_lines = 0;
|
|
p_first = 1;
|
|
}
|
|
p_max = p_ptrn_lines + 6; /* we need this much at least */
|
|
while (p_max >= hunkmax)
|
|
if (! grow_hunkmax ())
|
|
return -1;
|
|
p_max = hunkmax;
|
|
break;
|
|
case '-':
|
|
if (buf[1] != '-')
|
|
goto change_line;
|
|
if (ptrn_prefix_context == -1)
|
|
ptrn_prefix_context = context;
|
|
ptrn_suffix_context = context;
|
|
if (repl_beginning
|
|
|| (p_end
|
|
!= p_ptrn_lines + 1 + (p_Char[p_end - 1] == '\n')))
|
|
{
|
|
if (p_end == 1)
|
|
{
|
|
/* `Old' lines were omitted. Set up to fill
|
|
them in from `new' context lines. */
|
|
p_end = p_ptrn_lines + 1;
|
|
ptrn_prefix_context = ptrn_suffix_context = -1;
|
|
fillsrc = p_end + 1;
|
|
filldst = 1;
|
|
fillcnt = p_ptrn_lines;
|
|
}
|
|
else if (! repl_beginning)
|
|
fatal ("%s `---' at line %ld; check line numbers at line %ld",
|
|
(p_end <= p_ptrn_lines
|
|
? "Premature"
|
|
: "Overdue"),
|
|
p_input_line, p_hunk_beg);
|
|
else if (! repl_could_be_missing)
|
|
fatal ("duplicate `---' at line %ld; check line numbers at line %ld",
|
|
p_input_line, p_hunk_beg + repl_beginning);
|
|
else
|
|
{
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
}
|
|
repl_beginning = p_end;
|
|
repl_backtrack_position = file_tell (pfp);
|
|
repl_patch_line = p_input_line;
|
|
repl_context = context;
|
|
p_len[p_end] = strlen (buf);
|
|
if (! (p_line[p_end] = savestr (buf)))
|
|
{
|
|
p_end--;
|
|
return -1;
|
|
}
|
|
p_Char[p_end] = '=';
|
|
for (s = buf; *s && ! ISDIGIT (*s); s++)
|
|
continue;
|
|
if (!*s)
|
|
malformed ();
|
|
p_newfirst = (LINENUM) atol (s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
if (*s == ',')
|
|
{
|
|
do
|
|
{
|
|
if (!*++s)
|
|
malformed ();
|
|
}
|
|
while (! ISDIGIT (*s));
|
|
p_repl_lines = (LINENUM) atol (s) - p_newfirst + 1;
|
|
}
|
|
else if (p_newfirst)
|
|
p_repl_lines = 1;
|
|
else
|
|
{
|
|
p_repl_lines = 0;
|
|
p_newfirst = 1;
|
|
}
|
|
p_max = p_repl_lines + p_end;
|
|
while (p_max >= hunkmax)
|
|
if (! grow_hunkmax ())
|
|
return -1;
|
|
if (p_repl_lines != ptrn_copiable
|
|
&& (p_prefix_context != 0
|
|
|| context != 0
|
|
|| p_repl_lines != 1))
|
|
repl_could_be_missing = FALSE;
|
|
context = 0;
|
|
break;
|
|
case '+': case '!':
|
|
repl_could_be_missing = FALSE;
|
|
change_line:
|
|
s = buf + 1;
|
|
chars_read--;
|
|
if (*s == '\n' && canonicalize) {
|
|
strcpy (s, " \n");
|
|
chars_read = 2;
|
|
}
|
|
if (*s == ' ' || *s == '\t') {
|
|
s++;
|
|
chars_read--;
|
|
} else if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
if (! repl_beginning)
|
|
{
|
|
if (ptrn_prefix_context == -1)
|
|
ptrn_prefix_context = context;
|
|
}
|
|
else
|
|
{
|
|
if (repl_prefix_context == -1)
|
|
repl_prefix_context = context;
|
|
}
|
|
chars_read -=
|
|
(1 < chars_read
|
|
&& p_end == (repl_beginning ? p_max : p_ptrn_lines)
|
|
&& incomplete_line ());
|
|
p_len[p_end] = chars_read;
|
|
if (! (p_line[p_end] = savebuf (s, chars_read))) {
|
|
p_end--;
|
|
return -1;
|
|
}
|
|
context = 0;
|
|
break;
|
|
case '\t': case '\n': /* assume spaces got eaten */
|
|
s = buf;
|
|
if (*buf == '\t') {
|
|
s++;
|
|
chars_read--;
|
|
}
|
|
if (repl_beginning && repl_could_be_missing &&
|
|
(!ptrn_spaces_eaten || difftype == NEW_CONTEXT_DIFF) ) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
chars_read -=
|
|
(1 < chars_read
|
|
&& p_end == (repl_beginning ? p_max : p_ptrn_lines)
|
|
&& incomplete_line ());
|
|
p_len[p_end] = chars_read;
|
|
if (! (p_line[p_end] = savebuf (buf, chars_read))) {
|
|
p_end--;
|
|
return -1;
|
|
}
|
|
if (p_end != p_ptrn_lines + 1) {
|
|
ptrn_spaces_eaten |= (repl_beginning != 0);
|
|
some_context = TRUE;
|
|
context++;
|
|
if (!repl_beginning)
|
|
ptrn_copiable++;
|
|
p_Char[p_end] = ' ';
|
|
}
|
|
break;
|
|
case ' ':
|
|
s = buf + 1;
|
|
chars_read--;
|
|
if (*s == '\n' && canonicalize) {
|
|
strcpy (s, "\n");
|
|
chars_read = 2;
|
|
}
|
|
if (*s == ' ' || *s == '\t') {
|
|
s++;
|
|
chars_read--;
|
|
} else if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
some_context = TRUE;
|
|
context++;
|
|
if (!repl_beginning)
|
|
ptrn_copiable++;
|
|
chars_read -=
|
|
(1 < chars_read
|
|
&& p_end == (repl_beginning ? p_max : p_ptrn_lines)
|
|
&& incomplete_line ());
|
|
p_len[p_end] = chars_read;
|
|
if (! (p_line[p_end] = savebuf (buf + 2, chars_read))) {
|
|
p_end--;
|
|
return -1;
|
|
}
|
|
break;
|
|
default:
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
malformed ();
|
|
}
|
|
}
|
|
|
|
hunk_done:
|
|
if (p_end >=0 && !repl_beginning)
|
|
fatal ("no `---' found in patch at line %ld", pch_hunk_beg ());
|
|
|
|
if (repl_missing) {
|
|
|
|
/* reset state back to just after --- */
|
|
p_input_line = repl_patch_line;
|
|
context = repl_context;
|
|
for (p_end--; p_end > repl_beginning; p_end--)
|
|
free(p_line[p_end]);
|
|
Fseek (pfp, repl_backtrack_position, SEEK_SET);
|
|
|
|
/* redundant 'new' context lines were omitted - set */
|
|
/* up to fill them in from the old file context */
|
|
fillsrc = 1;
|
|
filldst = repl_beginning+1;
|
|
fillcnt = p_repl_lines;
|
|
p_end = p_max;
|
|
}
|
|
else if (!some_context && fillcnt == 1) {
|
|
/* the first hunk was a null hunk with no context */
|
|
/* and we were expecting one line -- fix it up. */
|
|
while (filldst < p_end) {
|
|
p_line[filldst] = p_line[filldst+1];
|
|
p_Char[filldst] = p_Char[filldst+1];
|
|
p_len[filldst] = p_len[filldst+1];
|
|
filldst++;
|
|
}
|
|
#if 0
|
|
repl_beginning--; /* this doesn't need to be fixed */
|
|
#endif
|
|
p_end--;
|
|
p_first++; /* do append rather than insert */
|
|
fillcnt = 0;
|
|
p_ptrn_lines = 0;
|
|
}
|
|
|
|
p_prefix_context = ((repl_prefix_context == -1
|
|
|| (ptrn_prefix_context != -1
|
|
&& ptrn_prefix_context < repl_prefix_context))
|
|
? ptrn_prefix_context : repl_prefix_context);
|
|
p_suffix_context = ((ptrn_suffix_context != -1
|
|
&& ptrn_suffix_context < context)
|
|
? ptrn_suffix_context : context);
|
|
assert (p_prefix_context != -1 && p_suffix_context != -1);
|
|
|
|
if (difftype == CONTEXT_DIFF
|
|
&& (fillcnt
|
|
|| (p_first > 1
|
|
&& p_prefix_context + p_suffix_context < ptrn_copiable))) {
|
|
if (verbosity == VERBOSE)
|
|
say ("%s\n%s\n%s\n",
|
|
"(Fascinating -- this is really a new-style context diff but without",
|
|
"the telltale extra asterisks on the *** line that usually indicate",
|
|
"the new style...)");
|
|
diff_type = difftype = NEW_CONTEXT_DIFF;
|
|
}
|
|
|
|
/* if there were omitted context lines, fill them in now */
|
|
if (fillcnt) {
|
|
p_bfake = filldst; /* remember where not to free() */
|
|
p_efake = filldst + fillcnt - 1;
|
|
while (fillcnt-- > 0) {
|
|
while (fillsrc <= p_end && fillsrc != repl_beginning
|
|
&& p_Char[fillsrc] != ' ')
|
|
fillsrc++;
|
|
if (p_end < fillsrc || fillsrc == repl_beginning)
|
|
fatal ("replacement text or line numbers mangled in hunk at line %ld",
|
|
p_hunk_beg);
|
|
p_line[filldst] = p_line[fillsrc];
|
|
p_Char[filldst] = p_Char[fillsrc];
|
|
p_len[filldst] = p_len[fillsrc];
|
|
fillsrc++; filldst++;
|
|
}
|
|
while (fillsrc <= p_end && fillsrc != repl_beginning)
|
|
{
|
|
if (p_Char[fillsrc] == ' ')
|
|
fatal ("replacement text or line numbers mangled in hunk at line %ld",
|
|
p_hunk_beg);
|
|
fillsrc++;
|
|
}
|
|
if (debug & 64)
|
|
printf("fillsrc %ld, filldst %ld, rb %ld, e+1 %ld\n",
|
|
fillsrc,filldst,repl_beginning,p_end+1);
|
|
assert(fillsrc==p_end+1 || fillsrc==repl_beginning);
|
|
assert(filldst==p_end+1 || filldst==repl_beginning);
|
|
}
|
|
}
|
|
else if (difftype == UNI_DIFF) {
|
|
file_offset line_beginning = file_tell (pfp);
|
|
/* file pos of the current line */
|
|
register LINENUM fillsrc; /* index of old lines */
|
|
register LINENUM filldst; /* index of new lines */
|
|
char ch = '\0';
|
|
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1
|
|
|| chars_read <= 4
|
|
|| strncmp (buf, "@@ -", 4) != 0) {
|
|
next_intuit_at(line_beginning,p_input_line);
|
|
return chars_read == (size_t) -1 ? -1 : 0;
|
|
}
|
|
s = buf+4;
|
|
if (!*s)
|
|
malformed ();
|
|
p_first = (LINENUM) atol(s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
if (*s == ',') {
|
|
p_ptrn_lines = (LINENUM) atol(++s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
} else
|
|
p_ptrn_lines = 1;
|
|
if (*s == ' ') s++;
|
|
if (*s != '+' || !*++s)
|
|
malformed ();
|
|
p_newfirst = (LINENUM) atol(s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
if (*s == ',') {
|
|
p_repl_lines = (LINENUM) atol(++s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
} else
|
|
p_repl_lines = 1;
|
|
if (*s == ' ') s++;
|
|
if (*s != '@')
|
|
malformed ();
|
|
if (!p_ptrn_lines)
|
|
p_first++; /* do append rather than insert */
|
|
if (!p_repl_lines)
|
|
p_newfirst++;
|
|
p_max = p_ptrn_lines + p_repl_lines + 1;
|
|
while (p_max >= hunkmax)
|
|
if (! grow_hunkmax ())
|
|
return -1;
|
|
fillsrc = 1;
|
|
filldst = fillsrc + p_ptrn_lines;
|
|
p_end = filldst + p_repl_lines;
|
|
sprintf (buf,"*** %ld,%ld ****\n",p_first,p_first + p_ptrn_lines - 1);
|
|
p_len[0] = strlen (buf);
|
|
if (! (p_line[0] = savestr (buf))) {
|
|
p_end = -1;
|
|
return -1;
|
|
}
|
|
p_Char[0] = '*';
|
|
sprintf (buf,"--- %ld,%ld ----\n",p_newfirst,p_newfirst+p_repl_lines-1);
|
|
p_len[filldst] = strlen (buf);
|
|
if (! (p_line[filldst] = savestr (buf))) {
|
|
p_end = 0;
|
|
return -1;
|
|
}
|
|
p_Char[filldst++] = '=';
|
|
p_prefix_context = -1;
|
|
p_hunk_beg = p_input_line + 1;
|
|
while (fillsrc <= p_ptrn_lines || filldst <= p_end) {
|
|
chars_read = get_line ();
|
|
if (!chars_read) {
|
|
if (p_max - filldst < 3) {
|
|
strcpy (buf, " \n"); /* assume blank lines got chopped */
|
|
chars_read = 2;
|
|
} else {
|
|
fatal ("unexpected end of file in patch");
|
|
}
|
|
}
|
|
if (chars_read == (size_t) -1)
|
|
s = 0;
|
|
else if (*buf == '\t' || *buf == '\n') {
|
|
ch = ' '; /* assume the space got eaten */
|
|
s = savebuf (buf, chars_read);
|
|
}
|
|
else {
|
|
ch = *buf;
|
|
s = savebuf (buf+1, --chars_read);
|
|
}
|
|
if (!s) {
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
return -1;
|
|
}
|
|
switch (ch) {
|
|
case '-':
|
|
if (fillsrc > p_ptrn_lines) {
|
|
free(s);
|
|
p_end = filldst-1;
|
|
malformed ();
|
|
}
|
|
chars_read -= fillsrc == p_ptrn_lines && incomplete_line ();
|
|
p_Char[fillsrc] = ch;
|
|
p_line[fillsrc] = s;
|
|
p_len[fillsrc++] = chars_read;
|
|
break;
|
|
case '=':
|
|
ch = ' ';
|
|
/* FALL THROUGH */
|
|
case ' ':
|
|
if (fillsrc > p_ptrn_lines) {
|
|
free(s);
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
malformed ();
|
|
}
|
|
context++;
|
|
chars_read -= fillsrc == p_ptrn_lines && incomplete_line ();
|
|
p_Char[fillsrc] = ch;
|
|
p_line[fillsrc] = s;
|
|
p_len[fillsrc++] = chars_read;
|
|
s = savebuf (s, chars_read);
|
|
if (!s) {
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
return -1;
|
|
}
|
|
/* FALL THROUGH */
|
|
case '+':
|
|
if (filldst > p_end) {
|
|
free(s);
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
malformed ();
|
|
}
|
|
chars_read -= filldst == p_end && incomplete_line ();
|
|
p_Char[filldst] = ch;
|
|
p_line[filldst] = s;
|
|
p_len[filldst++] = chars_read;
|
|
break;
|
|
default:
|
|
p_end = filldst;
|
|
malformed ();
|
|
}
|
|
if (ch != ' ') {
|
|
if (p_prefix_context == -1)
|
|
p_prefix_context = context;
|
|
context = 0;
|
|
}
|
|
}/* while */
|
|
if (p_prefix_context == -1)
|
|
malformed ();
|
|
p_suffix_context = context;
|
|
}
|
|
else { /* normal diff--fake it up */
|
|
char hunk_type;
|
|
register int i;
|
|
LINENUM min, max;
|
|
file_offset line_beginning = file_tell (pfp);
|
|
|
|
p_prefix_context = p_suffix_context = 0;
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1 || !chars_read || !ISDIGIT (*buf)) {
|
|
next_intuit_at(line_beginning,p_input_line);
|
|
return chars_read == (size_t) -1 ? -1 : 0;
|
|
}
|
|
p_first = (LINENUM)atol(buf);
|
|
for (s = buf; ISDIGIT (*s); s++)
|
|
continue;
|
|
if (*s == ',') {
|
|
p_ptrn_lines = (LINENUM)atol(++s) - p_first + 1;
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
}
|
|
else
|
|
p_ptrn_lines = (*s != 'a');
|
|
hunk_type = *s;
|
|
if (hunk_type == 'a')
|
|
p_first++; /* do append rather than insert */
|
|
min = (LINENUM)atol(++s);
|
|
while (ISDIGIT (*s))
|
|
s++;
|
|
if (*s == ',')
|
|
max = (LINENUM)atol(++s);
|
|
else
|
|
max = min;
|
|
if (hunk_type == 'd')
|
|
min++;
|
|
p_end = p_ptrn_lines + 1 + max - min + 1;
|
|
while (p_end >= hunkmax)
|
|
if (! grow_hunkmax ())
|
|
{
|
|
p_end = -1;
|
|
return -1;
|
|
}
|
|
p_newfirst = min;
|
|
p_repl_lines = max - min + 1;
|
|
sprintf (buf, "*** %ld,%ld\n", p_first, p_first + p_ptrn_lines - 1);
|
|
p_len[0] = strlen (buf);
|
|
if (! (p_line[0] = savestr (buf))) {
|
|
p_end = -1;
|
|
return -1;
|
|
}
|
|
p_Char[0] = '*';
|
|
for (i=1; i<=p_ptrn_lines; i++) {
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1)
|
|
{
|
|
p_end = i - 1;
|
|
return -1;
|
|
}
|
|
if (!chars_read)
|
|
fatal ("unexpected end of file in patch at line %ld",
|
|
p_input_line);
|
|
if (buf[0] != '<' || (buf[1] != ' ' && buf[1] != '\t'))
|
|
fatal ("`<' expected at line %ld of patch", p_input_line);
|
|
chars_read -= 2 + (i == p_ptrn_lines && incomplete_line ());
|
|
p_len[i] = chars_read;
|
|
if (! (p_line[i] = savebuf (buf + 2, chars_read))) {
|
|
p_end = i-1;
|
|
return -1;
|
|
}
|
|
p_Char[i] = '-';
|
|
}
|
|
if (hunk_type == 'c') {
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1)
|
|
{
|
|
p_end = i - 1;
|
|
return -1;
|
|
}
|
|
if (! chars_read)
|
|
fatal ("unexpected end of file in patch at line %ld",
|
|
p_input_line);
|
|
if (*buf != '-')
|
|
fatal ("`---' expected at line %ld of patch", p_input_line);
|
|
}
|
|
sprintf (buf, "--- %ld,%ld\n", min, max);
|
|
p_len[i] = strlen (buf);
|
|
if (! (p_line[i] = savestr (buf))) {
|
|
p_end = i-1;
|
|
return -1;
|
|
}
|
|
p_Char[i] = '=';
|
|
for (i++; i<=p_end; i++) {
|
|
chars_read = get_line ();
|
|
if (chars_read == (size_t) -1)
|
|
{
|
|
p_end = i - 1;
|
|
return -1;
|
|
}
|
|
if (!chars_read)
|
|
fatal ("unexpected end of file in patch at line %ld",
|
|
p_input_line);
|
|
if (buf[0] != '>' || (buf[1] != ' ' && buf[1] != '\t'))
|
|
fatal ("`>' expected at line %ld of patch", p_input_line);
|
|
chars_read -= 2 + (i == p_end && incomplete_line ());
|
|
p_len[i] = chars_read;
|
|
if (! (p_line[i] = savebuf (buf + 2, chars_read))) {
|
|
p_end = i-1;
|
|
return -1;
|
|
}
|
|
p_Char[i] = '+';
|
|
}
|
|
}
|
|
if (rev) /* backwards patch? */
|
|
if (!pch_swap())
|
|
say ("Not enough memory to swap next hunk!\n");
|
|
if (debug & 2) {
|
|
LINENUM i;
|
|
char special;
|
|
|
|
for (i=0; i <= p_end; i++) {
|
|
if (i == p_ptrn_lines)
|
|
special = '^';
|
|
else
|
|
special = ' ';
|
|
fprintf (stderr, "%3ld %c %c ", i, p_Char[i], special);
|
|
pch_write_line (i, stderr);
|
|
fflush (stderr);
|
|
}
|
|
}
|
|
if (p_end+1 < hunkmax) /* paranoia reigns supreme... */
|
|
p_Char[p_end+1] = '^'; /* add a stopper for apply_hunk */
|
|
return 1;
|
|
}
|
|
|
|
static size_t
|
|
get_line ()
|
|
{
|
|
return pget_line (p_indent, p_rfc934_nesting);
|
|
}
|
|
|
|
/* Input a line from the patch file, worrying about indentation.
|
|
Strip up to INDENT characters' worth of leading indentation.
|
|
Then remove up to RFC934_NESTING instances of leading "- ".
|
|
Ignore any partial lines at end of input, but warn about them.
|
|
Succeed if a line was read; it is terminated by "\n\0" for convenience.
|
|
Return the number of characters read, including '\n' but not '\0'.
|
|
Return -1 if we ran out of memory. */
|
|
|
|
static size_t
|
|
pget_line (indent, rfc934_nesting)
|
|
int indent;
|
|
int rfc934_nesting;
|
|
{
|
|
register FILE *fp = pfp;
|
|
register int c;
|
|
register int i = 0;
|
|
register char *b;
|
|
register size_t s;
|
|
|
|
for (;;)
|
|
{
|
|
c = getc (fp);
|
|
if (c == EOF)
|
|
{
|
|
if (ferror (fp))
|
|
read_fatal ();
|
|
return 0;
|
|
}
|
|
if (indent <= i)
|
|
break;
|
|
if (c == ' ' || c == 'X')
|
|
i++;
|
|
else if (c == '\t')
|
|
i = (i + 8) & ~7;
|
|
else
|
|
break;
|
|
}
|
|
|
|
i = 0;
|
|
b = buf;
|
|
|
|
while (c == '-' && 0 <= --rfc934_nesting)
|
|
{
|
|
c = getc (fp);
|
|
if (c == EOF)
|
|
goto patch_ends_in_middle_of_line;
|
|
if (c != ' ')
|
|
{
|
|
i = 1;
|
|
b[0] = '-';
|
|
break;
|
|
}
|
|
c = getc (fp);
|
|
if (c == EOF)
|
|
goto patch_ends_in_middle_of_line;
|
|
}
|
|
|
|
s = bufsize;
|
|
|
|
for (;;)
|
|
{
|
|
if (i == s - 1)
|
|
{
|
|
s *= 2;
|
|
b = realloc (b, s);
|
|
if (!b)
|
|
{
|
|
if (!using_plan_a)
|
|
memory_fatal ();
|
|
return (size_t) -1;
|
|
}
|
|
buf = b;
|
|
bufsize = s;
|
|
}
|
|
b[i++] = c;
|
|
if (c == '\n')
|
|
break;
|
|
c = getc (fp);
|
|
if (c == EOF)
|
|
goto patch_ends_in_middle_of_line;
|
|
}
|
|
|
|
b[i] = '\0';
|
|
p_input_line++;
|
|
return i;
|
|
|
|
patch_ends_in_middle_of_line:
|
|
if (ferror (fp))
|
|
read_fatal ();
|
|
say ("patch unexpectedly ends in middle of line\n");
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
incomplete_line ()
|
|
{
|
|
register FILE *fp = pfp;
|
|
register int c;
|
|
register file_offset line_beginning = file_tell (fp);
|
|
|
|
if (getc (fp) == '\\')
|
|
{
|
|
while ((c = getc (fp)) != '\n' && c != EOF)
|
|
continue;
|
|
return TRUE;
|
|
}
|
|
else
|
|
{
|
|
/* We don't trust ungetc. */
|
|
Fseek (pfp, line_beginning, SEEK_SET);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Reverse the old and new portions of the current hunk. */
|
|
|
|
bool
|
|
pch_swap()
|
|
{
|
|
char **tp_line; /* the text of the hunk */
|
|
size_t *tp_len; /* length of each line */
|
|
char *tp_char; /* +, -, and ! */
|
|
register LINENUM i;
|
|
register LINENUM n;
|
|
bool blankline = FALSE;
|
|
register char *s;
|
|
|
|
i = p_first;
|
|
p_first = p_newfirst;
|
|
p_newfirst = i;
|
|
|
|
/* make a scratch copy */
|
|
|
|
tp_line = p_line;
|
|
tp_len = p_len;
|
|
tp_char = p_Char;
|
|
p_line = 0; /* force set_hunkmax to allocate again */
|
|
p_len = 0;
|
|
p_Char = 0;
|
|
set_hunkmax();
|
|
if (!p_line || !p_len || !p_Char) {
|
|
if (p_line)
|
|
free (p_line);
|
|
p_line = tp_line;
|
|
if (p_len)
|
|
free (p_len);
|
|
p_len = tp_len;
|
|
if (p_Char)
|
|
free (p_Char);
|
|
p_Char = tp_char;
|
|
return FALSE; /* not enough memory to swap hunk! */
|
|
}
|
|
|
|
/* now turn the new into the old */
|
|
|
|
i = p_ptrn_lines + 1;
|
|
if (tp_char[i] == '\n') { /* account for possible blank line */
|
|
blankline = TRUE;
|
|
i++;
|
|
}
|
|
if (p_efake >= 0) { /* fix non-freeable ptr range */
|
|
if (p_efake <= i)
|
|
n = p_end - i + 1;
|
|
else
|
|
n = -i;
|
|
p_efake += n;
|
|
p_bfake += n;
|
|
}
|
|
for (n=0; i <= p_end; i++,n++) {
|
|
p_line[n] = tp_line[i];
|
|
p_Char[n] = tp_char[i];
|
|
if (p_Char[n] == '+')
|
|
p_Char[n] = '-';
|
|
p_len[n] = tp_len[i];
|
|
}
|
|
if (blankline) {
|
|
i = p_ptrn_lines + 1;
|
|
p_line[n] = tp_line[i];
|
|
p_Char[n] = tp_char[i];
|
|
p_len[n] = tp_len[i];
|
|
n++;
|
|
}
|
|
assert(p_Char[0] == '=');
|
|
p_Char[0] = '*';
|
|
for (s=p_line[0]; *s; s++)
|
|
if (*s == '-')
|
|
*s = '*';
|
|
|
|
/* now turn the old into the new */
|
|
|
|
assert(tp_char[0] == '*');
|
|
tp_char[0] = '=';
|
|
for (s=tp_line[0]; *s; s++)
|
|
if (*s == '*')
|
|
*s = '-';
|
|
for (i=0; n <= p_end; i++,n++) {
|
|
p_line[n] = tp_line[i];
|
|
p_Char[n] = tp_char[i];
|
|
if (p_Char[n] == '-')
|
|
p_Char[n] = '+';
|
|
p_len[n] = tp_len[i];
|
|
}
|
|
assert(i == p_ptrn_lines + 1);
|
|
i = p_ptrn_lines;
|
|
p_ptrn_lines = p_repl_lines;
|
|
p_repl_lines = i;
|
|
if (tp_line)
|
|
free (tp_line);
|
|
if (tp_len)
|
|
free (tp_len);
|
|
if (tp_char)
|
|
free (tp_char);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Return whether file WHICH (0 = old, 1 = new) appears to nonexistent.
|
|
Return 1 for empty, 2 for nonexistent. */
|
|
|
|
bool
|
|
pch_says_nonexistent (which)
|
|
int which;
|
|
{
|
|
return p_says_nonexistent[which];
|
|
}
|
|
|
|
/* Return timestamp of patch header for file WHICH (0 = old, 1 = new),
|
|
or -1 if there was no timestamp or an error in the timestamp. */
|
|
|
|
time_t
|
|
pch_timestamp (which)
|
|
int which;
|
|
{
|
|
return p_timestamp[which];
|
|
}
|
|
|
|
/* Return the specified line position in the old file of the old context. */
|
|
|
|
LINENUM
|
|
pch_first()
|
|
{
|
|
return p_first;
|
|
}
|
|
|
|
/* Return the number of lines of old context. */
|
|
|
|
LINENUM
|
|
pch_ptrn_lines()
|
|
{
|
|
return p_ptrn_lines;
|
|
}
|
|
|
|
/* Return the probable line position in the new file of the first line. */
|
|
|
|
LINENUM
|
|
pch_newfirst()
|
|
{
|
|
return p_newfirst;
|
|
}
|
|
|
|
/* Return the number of lines in the replacement text including context. */
|
|
|
|
LINENUM
|
|
pch_repl_lines()
|
|
{
|
|
return p_repl_lines;
|
|
}
|
|
|
|
/* Return the number of lines in the whole hunk. */
|
|
|
|
LINENUM
|
|
pch_end()
|
|
{
|
|
return p_end;
|
|
}
|
|
|
|
/* Return the number of context lines before the first changed line. */
|
|
|
|
LINENUM
|
|
pch_prefix_context ()
|
|
{
|
|
return p_prefix_context;
|
|
}
|
|
|
|
/* Return the number of context lines after the last changed line. */
|
|
|
|
LINENUM
|
|
pch_suffix_context ()
|
|
{
|
|
return p_suffix_context;
|
|
}
|
|
|
|
/* Return the length of a particular patch line. */
|
|
|
|
size_t
|
|
pch_line_len(line)
|
|
LINENUM line;
|
|
{
|
|
return p_len[line];
|
|
}
|
|
|
|
/* Return the control character (+, -, *, !, etc) for a patch line. */
|
|
|
|
char
|
|
pch_char(line)
|
|
LINENUM line;
|
|
{
|
|
return p_Char[line];
|
|
}
|
|
|
|
/* Return a pointer to a particular patch line. */
|
|
|
|
char *
|
|
pfetch(line)
|
|
LINENUM line;
|
|
{
|
|
return p_line[line];
|
|
}
|
|
|
|
/* Output a patch line. */
|
|
|
|
bool
|
|
pch_write_line (line, file)
|
|
LINENUM line;
|
|
FILE *file;
|
|
{
|
|
bool after_newline = p_line[line][p_len[line] - 1] == '\n';
|
|
if (! fwrite (p_line[line], sizeof (*p_line[line]), p_len[line], file))
|
|
write_fatal ();
|
|
return after_newline;
|
|
}
|
|
|
|
/* Return where in the patch file this hunk began, for error messages. */
|
|
|
|
LINENUM
|
|
pch_hunk_beg()
|
|
{
|
|
return p_hunk_beg;
|
|
}
|
|
|
|
/* Apply an ed script by feeding ed itself. */
|
|
|
|
void
|
|
do_ed_script (ofp)
|
|
FILE *ofp;
|
|
{
|
|
static char const ed_program[] = ed_PROGRAM;
|
|
|
|
register char *t;
|
|
register file_offset beginning_of_this_line;
|
|
register bool this_line_is_command = FALSE;
|
|
register FILE *pipefp = 0;
|
|
register size_t chars_read;
|
|
|
|
if (!skip_rest_of_patch) {
|
|
assert (! inerrno);
|
|
copy_file (inname, TMPOUTNAME, instat.st_mode);
|
|
sprintf (buf, "%s %s%s", ed_program, verbosity == VERBOSE ? "" : "- ",
|
|
TMPOUTNAME);
|
|
fflush (stdout);
|
|
pipefp = popen(buf, binary_transput ? "wb" : "w");
|
|
if (!pipefp)
|
|
pfatal ("can't open pipe to `%s'", buf);
|
|
}
|
|
for (;;) {
|
|
beginning_of_this_line = file_tell (pfp);
|
|
chars_read = get_line ();
|
|
if (! chars_read) {
|
|
next_intuit_at(beginning_of_this_line,p_input_line);
|
|
break;
|
|
}
|
|
for (t = buf; ISDIGIT (*t) || *t == ','; t++)
|
|
continue;
|
|
this_line_is_command = (ISDIGIT (*buf) &&
|
|
(*t == 'd' || *t == 'c' || *t == 'a' || *t == 'i' || *t == 's') );
|
|
if (this_line_is_command) {
|
|
if (pipefp)
|
|
if (! fwrite (buf, sizeof *buf, chars_read, pipefp))
|
|
write_fatal ();
|
|
if (*t != 'd' && *t != 's') {
|
|
while ((chars_read = get_line ()) != 0) {
|
|
if (pipefp)
|
|
if (! fwrite (buf, sizeof *buf, chars_read, pipefp))
|
|
write_fatal ();
|
|
if (chars_read == 2 && strEQ (buf, ".\n"))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
next_intuit_at(beginning_of_this_line,p_input_line);
|
|
break;
|
|
}
|
|
}
|
|
if (!pipefp)
|
|
return;
|
|
if (fwrite ("w\nq\n", sizeof (char), (size_t) 4, pipefp) == 0
|
|
|| fflush (pipefp) != 0)
|
|
write_fatal ();
|
|
if (pclose (pipefp) != 0)
|
|
fatal ("%s FAILED", ed_program);
|
|
|
|
if (ofp)
|
|
{
|
|
FILE *ifp = fopen (TMPOUTNAME, binary_transput ? "rb" : "r");
|
|
int c;
|
|
if (!ifp)
|
|
pfatal ("can't open `%s'", TMPOUTNAME);
|
|
while ((c = getc (ifp)) != EOF)
|
|
if (putc (c, ofp) == EOF)
|
|
write_fatal ();
|
|
if (ferror (ifp) || fclose (ifp) != 0)
|
|
read_fatal ();
|
|
}
|
|
}
|