c384a27805
musl libc fgetln is a bit more pickier. Hinted by: chimera-linux (git 31491e1de2e1241885984cd9e4b978965f14eda4)
1660 lines
40 KiB
C
1660 lines
40 KiB
C
/*-
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* Copyright 1986, Larry Wall
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following condition is met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this condition and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* patch - a program to apply diffs to original files
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*
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* -C option added in 1998, original code by Marc Espie, based on FreeBSD
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* behaviour
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*
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* $OpenBSD: pch.c,v 1.43 2014/11/18 17:03:35 tobias Exp $
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <libgen.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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#include "util.h"
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#include "pch.h"
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#include "pathnames.h"
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/* Patch (diff listing) abstract type. */
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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_context = 3; /* # of context lines */
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static LINENUM p_input_line = 0; /* current line # from patch file */
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static char **p_line = NULL;/* the text of the hunk */
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static unsigned short *p_len = NULL; /* length of each line */
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static char *p_char = NULL; /* +, -, and ! */
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static int hunkmax = INITHUNKMAX; /* size of above arrays to begin with */
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static int p_indent; /* indent to patch */
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static off_t p_base; /* where to intuit this time */
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static LINENUM p_bline; /* line # of p_base */
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static off_t 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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static FILE *pfp = NULL; /* patch file pointer */
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static char *bestguess = NULL; /* guess at correct filename */
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char *source_file;
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static void grow_hunkmax(void);
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static int intuit_diff_type(void);
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static void next_intuit_at(off_t, LINENUM);
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static void skip_to(off_t, LINENUM);
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static size_t pgets(bool _do_indent);
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static char *best_name(const struct file_name *, bool);
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static char *posix_name(const struct file_name *, bool);
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static size_t num_components(const char *);
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static LINENUM strtolinenum(char *, char **);
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/*
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* Prepare to look for the next patch in the patch file.
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*/
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void
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re_patch(void)
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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 = (LINENUM) - 1;
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p_max = 0;
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p_indent = 0;
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}
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/*
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* Open the patch file at the beginning of time.
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*/
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void
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open_patch_file(const char *filename)
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{
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struct stat filestat;
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int nr, nw;
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if (filename == NULL || *filename == '\0' || strEQ(filename, "-")) {
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pfp = fopen(TMPPATNAME, "w");
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if (pfp == NULL)
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pfatal("can't create %s", TMPPATNAME);
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while ((nr = fread(buf, 1, buf_size, stdin)) > 0) {
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nw = fwrite(buf, 1, nr, pfp);
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if (nr != nw)
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pfatal("write error to %s", TMPPATNAME);
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}
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if (ferror(pfp) || fclose(pfp))
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pfatal("can't write %s", TMPPATNAME);
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filename = TMPPATNAME;
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}
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pfp = fopen(filename, "r");
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if (pfp == NULL)
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pfatal("patch file %s not found", filename);
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if (fstat(fileno(pfp), &filestat))
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pfatal("can't stat %s", filename);
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p_filesize = filestat.st_size;
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next_intuit_at(0, 1L); /* start at the beginning */
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set_hunkmax();
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}
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/*
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* Make sure our dynamically realloced tables are malloced to begin with.
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*/
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void
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set_hunkmax(void)
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{
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if (p_line == NULL)
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p_line = malloc(hunkmax * sizeof(char *));
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if (p_len == NULL)
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p_len = malloc(hunkmax * sizeof(unsigned short));
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if (p_char == NULL)
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p_char = malloc(hunkmax * sizeof(char));
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}
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/*
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* Enlarge the arrays containing the current hunk of patch.
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*/
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static void
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grow_hunkmax(void)
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{
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int new_hunkmax = hunkmax * 2;
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if (p_line == NULL || p_len == NULL || p_char == NULL)
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fatal("Internal memory allocation error\n");
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p_line = reallocf(p_line, new_hunkmax * sizeof(char *));
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p_len = reallocf(p_len, new_hunkmax * sizeof(unsigned short));
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p_char = reallocf(p_char, new_hunkmax * sizeof(char));
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if (p_line != NULL && p_len != NULL && p_char != NULL) {
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hunkmax = new_hunkmax;
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return;
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}
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if (!using_plan_a)
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fatal("out of memory\n");
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out_of_mem = true; /* whatever is null will be allocated again */
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/* from within plan_a(), of all places */
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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(void)
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{
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bool exists = false;
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if (p_base != 0 && p_base >= p_filesize) {
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if (verbose)
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say("done\n");
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return false;
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}
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if (p_filesize == 0)
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return false;
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nonempty_patchf_seen = true;
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if (verbose)
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say("Hmm...");
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diff_type = intuit_diff_type();
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if (!diff_type) {
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if (p_base != 0) {
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if (verbose)
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say(" Ignoring the trailing garbage.\ndone\n");
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} else
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say(" I can't seem to find a patch in there anywhere.\n");
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return false;
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}
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if (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 (p_indent && verbose)
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say("(Patch is indented %d space%s.)\n", p_indent,
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p_indent == 1 ? "" : "s");
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skip_to(p_start, p_sline);
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while (filearg[0] == NULL) {
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if (force || batch) {
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say("No file to patch. Skipping...\n");
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filearg[0] = xstrdup(bestguess);
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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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if (*buf != '\n') {
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free(bestguess);
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bestguess = xstrdup(buf);
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filearg[0] = fetchname(buf, &exists, 0);
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}
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/*
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* fetchname can now return buf = NULL, exists = true, to
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* indicate to the caller that /dev/null was specified. Retain
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* previous behavior for now until this can be better evaluted.
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*/
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if (filearg[0] == NULL || !exists) {
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int def_skip = *bestguess == '\0';
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ask("No file found--skip this patch? [%c] ",
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def_skip ? 'y' : 'n');
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if (*buf == 'n' || (!def_skip && *buf != 'y'))
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continue;
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if (verbose)
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say("Skipping patch...\n");
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free(filearg[0]);
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filearg[0] = fetchname(bestguess, &exists, 0);
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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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return true;
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}
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static void
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p4_fetchname(struct file_name *name, char *str)
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{
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char *t, *h;
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/* Skip leading whitespace. */
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while (isspace((unsigned char)*str))
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str++;
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/* Remove the file revision number. */
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for (t = str, h = NULL; *t != '\0' && !isspace((unsigned char)*t); t++)
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if (*t == '#')
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h = t;
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if (h != NULL)
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*h = '\0';
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name->path = fetchname(str, &name->exists, strippath);
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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 int
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intuit_diff_type(void)
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{
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off_t this_line = 0, previous_line;
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off_t first_command_line = -1;
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LINENUM fcl_line = -1;
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bool last_line_was_command = false, this_is_a_command = false;
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bool stars_last_line = false, stars_this_line = false;
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char *s, *t;
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int indent, retval;
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struct file_name names[MAX_FILE];
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int piece_of_git = 0;
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memset(names, 0, sizeof(names));
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ok_to_create_file = false;
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fseeko(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 = ftello(pfp);
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indent = 0;
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p_input_line++;
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if (pgets(false) == 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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} else {
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p_start = this_line;
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p_sline = p_input_line;
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retval = 0;
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goto scan_exit;
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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 += 8 - (indent % 8);
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else
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indent++;
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}
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for (t = s; isdigit((unsigned char)*t) || *t == ','; t++)
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;
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this_is_a_command = (isdigit((unsigned char)*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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names[OLD_FILE].path = fetchname(s + 4,
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&names[OLD_FILE].exists, strippath);
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else if (strnEQ(s, "--- ", 4)) {
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size_t off = 4;
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if (piece_of_git && strippath == 957 &&
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strnEQ(s, "--- a/", 6))
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off = 6;
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names[NEW_FILE].path = fetchname(s + off,
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&names[NEW_FILE].exists, strippath);
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} else if (strnEQ(s, "+++ ", 4)) {
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/* pretend it is the old name */
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size_t off = 4;
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if (piece_of_git && strippath == 957 &&
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strnEQ(s, "+++ b/", 6))
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off = 6;
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names[OLD_FILE].path = fetchname(s + off,
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&names[OLD_FILE].exists, strippath);
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} else if (strnEQ(s, "Index:", 6))
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names[INDEX_FILE].path = fetchname(s + 6,
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&names[INDEX_FILE].exists, strippath);
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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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;
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revision = xstrdup(t);
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for (t = revision;
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*t && !isspace((unsigned char)*t); t++)
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;
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*t = '\0';
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if (*revision == '\0') {
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free(revision);
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revision = NULL;
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}
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} else if (strnEQ(s, "diff --git a/", 13)) {
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/* Git-style diffs. */
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piece_of_git = 1;
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} else if (strnEQ(s, "==== ", 5)) {
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/* Perforce-style diffs. */
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if ((t = strstr(s + 5, " - ")) != NULL)
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p4_fetchname(&names[NEW_FILE], t + 3);
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p4_fetchname(&names[OLD_FILE], s + 5);
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}
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if ((!diff_type || 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 || diff_type == UNI_DIFF) && strnEQ(s, "@@ -", 4)) {
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if (strnEQ(s + 4, "0,0", 3))
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ok_to_create_file = true;
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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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goto scan_exit;
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}
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stars_this_line = strnEQ(s, "********", 8);
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if ((!diff_type || diff_type == CONTEXT_DIFF) && stars_last_line &&
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strnEQ(s, "*** ", 4)) {
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if (strtolinenum(s + 4, &s) == 0)
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ok_to_create_file = true;
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/*
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* If this is a new context diff the character just
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* at the end of the line is a '*'.
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*/
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while (*s && *s != '\n')
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s++;
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p_indent = indent;
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p_start = previous_line;
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p_sline = p_input_line - 1;
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retval = (*(s - 1) == '*' ? NEW_CONTEXT_DIFF : CONTEXT_DIFF);
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goto scan_exit;
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}
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if ((!diff_type || diff_type == NORMAL_DIFF) &&
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last_line_was_command &&
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(strnEQ(s, "< ", 2) || strnEQ(s, "> ", 2))) {
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p_start = previous_line;
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p_sline = p_input_line - 1;
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p_indent = indent;
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retval = NORMAL_DIFF;
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goto scan_exit;
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}
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}
|
|
scan_exit:
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if (retval == UNI_DIFF) {
|
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/* unswap old and new */
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struct file_name tmp = names[OLD_FILE];
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names[OLD_FILE] = names[NEW_FILE];
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names[NEW_FILE] = tmp;
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}
|
|
|
|
/* Invalidated */
|
|
free(source_file);
|
|
source_file = NULL;
|
|
|
|
if (retval != 0) {
|
|
/*
|
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* If we've successfully determined a diff type, stored in
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* retval, path == NULL means _PATH_DEVNULL if exists is set.
|
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* Explicitly specify it here to make it easier to detect later
|
|
* on that we're actually creating a file and not that we've
|
|
* just goofed something up.
|
|
*/
|
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if (names[OLD_FILE].path != NULL)
|
|
source_file = xstrdup(names[OLD_FILE].path);
|
|
else if (names[OLD_FILE].exists)
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source_file = xstrdup(_PATH_DEVNULL);
|
|
}
|
|
if (filearg[0] == NULL) {
|
|
if (posix)
|
|
filearg[0] = posix_name(names, ok_to_create_file);
|
|
else {
|
|
/* Ignore the Index: name for context diffs, like GNU */
|
|
if (names[OLD_FILE].path != NULL ||
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names[NEW_FILE].path != NULL) {
|
|
free(names[INDEX_FILE].path);
|
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names[INDEX_FILE].path = NULL;
|
|
}
|
|
filearg[0] = best_name(names, ok_to_create_file);
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}
|
|
}
|
|
|
|
free(bestguess);
|
|
bestguess = NULL;
|
|
if (filearg[0] != NULL)
|
|
bestguess = xstrdup(filearg[0]);
|
|
else if (!ok_to_create_file) {
|
|
/*
|
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* We don't want to create a new file but we need a
|
|
* filename to set bestguess. Avoid setting filearg[0]
|
|
* so the file is not created automatically.
|
|
*/
|
|
if (posix)
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|
bestguess = posix_name(names, true);
|
|
else
|
|
bestguess = best_name(names, true);
|
|
}
|
|
free(names[OLD_FILE].path);
|
|
free(names[NEW_FILE].path);
|
|
free(names[INDEX_FILE].path);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Remember where this patch ends so we know where to start up again.
|
|
*/
|
|
static void
|
|
next_intuit_at(off_t file_pos, LINENUM file_line)
|
|
{
|
|
p_base = file_pos;
|
|
p_bline = file_line;
|
|
}
|
|
|
|
/*
|
|
* Basically a verbose fseeko() to the actual diff listing.
|
|
*/
|
|
static void
|
|
skip_to(off_t file_pos, LINENUM file_line)
|
|
{
|
|
size_t len;
|
|
|
|
if (p_base > file_pos)
|
|
fatal("Internal error: seek %lld>%lld\n",
|
|
(long long)p_base, (long long)file_pos);
|
|
if (verbose && p_base < file_pos) {
|
|
fseeko(pfp, p_base, SEEK_SET);
|
|
say("The text leading up to this was:\n--------------------------\n");
|
|
while (ftello(pfp) < file_pos) {
|
|
len = pgets(false);
|
|
if (len == 0)
|
|
fatal("Unexpected end of file\n");
|
|
say("|%s", buf);
|
|
}
|
|
say("--------------------------\n");
|
|
} else
|
|
fseeko(pfp, file_pos, SEEK_SET);
|
|
p_input_line = file_line - 1;
|
|
}
|
|
|
|
/* Make this a function for better debugging. */
|
|
static void
|
|
malformed(void)
|
|
{
|
|
fatal("malformed patch at line %ld: %s", p_input_line, buf);
|
|
/* about as informative as "Syntax error" in C */
|
|
}
|
|
|
|
/*
|
|
* True if the line has been discarded (i.e. it is a line saying
|
|
* "\ No newline at end of file".)
|
|
*/
|
|
static bool
|
|
remove_special_line(void)
|
|
{
|
|
int c;
|
|
|
|
c = fgetc(pfp);
|
|
if (c == '\\') {
|
|
do {
|
|
c = fgetc(pfp);
|
|
} while (c != EOF && c != '\n');
|
|
|
|
return true;
|
|
}
|
|
if (c != EOF)
|
|
fseeko(pfp, -1, SEEK_CUR);
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* True if there is more of the current diff listing to process.
|
|
*/
|
|
bool
|
|
another_hunk(void)
|
|
{
|
|
off_t line_beginning; /* file pos of the current line */
|
|
LINENUM repl_beginning; /* index of --- line */
|
|
LINENUM fillcnt; /* #lines of missing ptrn or repl */
|
|
LINENUM fillsrc; /* index of first line to copy */
|
|
LINENUM filldst; /* index of first missing line */
|
|
bool ptrn_spaces_eaten; /* ptrn was slightly malformed */
|
|
bool repl_could_be_missing; /* no + or ! lines in this hunk */
|
|
bool repl_missing; /* we are now backtracking */
|
|
off_t repl_backtrack_position; /* file pos of first repl line */
|
|
LINENUM repl_patch_line; /* input line number for same */
|
|
LINENUM ptrn_copiable; /* # of copiable lines in ptrn */
|
|
char *s;
|
|
size_t len;
|
|
int context = 0;
|
|
|
|
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--;
|
|
}
|
|
p_efake = -1;
|
|
|
|
p_max = hunkmax; /* gets reduced when --- found */
|
|
if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) {
|
|
line_beginning = ftello(pfp);
|
|
repl_beginning = 0;
|
|
fillcnt = 0;
|
|
fillsrc = 0;
|
|
filldst = 0;
|
|
ptrn_spaces_eaten = false;
|
|
repl_could_be_missing = true;
|
|
repl_missing = false;
|
|
repl_backtrack_position = 0;
|
|
repl_patch_line = 0;
|
|
ptrn_copiable = 0;
|
|
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0 || strnNE(buf, "********", 8)) {
|
|
next_intuit_at(line_beginning, p_input_line);
|
|
return false;
|
|
}
|
|
p_context = 100;
|
|
p_hunk_beg = p_input_line + 1;
|
|
while (p_end < p_max) {
|
|
line_beginning = ftello(pfp);
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0) {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
fatal("unexpected end of file in patch\n");
|
|
}
|
|
p_end++;
|
|
if (p_end >= hunkmax)
|
|
fatal("Internal error: hunk larger than hunk "
|
|
"buffer size");
|
|
p_char[p_end] = *buf;
|
|
p_line[p_end] = NULL;
|
|
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\n",
|
|
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_line[p_end] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end--;
|
|
return false;
|
|
}
|
|
for (s = buf;
|
|
*s && !isdigit((unsigned char)*s); s++)
|
|
;
|
|
if (!*s)
|
|
malformed();
|
|
if (strnEQ(s, "0,0", 3))
|
|
memmove(s, s + 2, strlen(s + 2) + 1);
|
|
p_first = strtolinenum(s, &s);
|
|
if (*s == ',') {
|
|
for (;
|
|
*s && !isdigit((unsigned char)*s); s++)
|
|
;
|
|
if (!*s)
|
|
malformed();
|
|
p_ptrn_lines = strtolinenum(s, &s) - p_first + 1;
|
|
if (p_ptrn_lines < 0)
|
|
malformed();
|
|
} else if (p_first)
|
|
p_ptrn_lines = 1;
|
|
else {
|
|
p_ptrn_lines = 0;
|
|
p_first = 1;
|
|
}
|
|
if (p_first >= LINENUM_MAX - p_ptrn_lines ||
|
|
p_ptrn_lines >= LINENUM_MAX - 6)
|
|
malformed();
|
|
|
|
/* we need this much at least */
|
|
p_max = p_ptrn_lines + 6;
|
|
while (p_max >= hunkmax)
|
|
grow_hunkmax();
|
|
p_max = hunkmax;
|
|
break;
|
|
case '-':
|
|
if (buf[1] == '-') {
|
|
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;
|
|
fillsrc = p_end + 1;
|
|
filldst = 1;
|
|
fillcnt = p_ptrn_lines;
|
|
} else {
|
|
if (repl_beginning) {
|
|
if (repl_could_be_missing) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
fatal("duplicate \"---\" at line %ld--check line numbers at line %ld\n",
|
|
p_input_line, p_hunk_beg + repl_beginning);
|
|
} else {
|
|
fatal("%s \"---\" at line %ld--check line numbers at line %ld\n",
|
|
(p_end <= p_ptrn_lines
|
|
? "Premature"
|
|
: "Overdue"),
|
|
p_input_line, p_hunk_beg);
|
|
}
|
|
}
|
|
}
|
|
repl_beginning = p_end;
|
|
repl_backtrack_position = ftello(pfp);
|
|
repl_patch_line = p_input_line;
|
|
p_line[p_end] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end--;
|
|
return false;
|
|
}
|
|
p_char[p_end] = '=';
|
|
for (s = buf; *s && !isdigit((unsigned char)*s); s++)
|
|
;
|
|
if (!*s)
|
|
malformed();
|
|
p_newfirst = strtolinenum(s, &s);
|
|
if (*s == ',') {
|
|
for (; *s && !isdigit((unsigned char)*s); s++)
|
|
;
|
|
if (!*s)
|
|
malformed();
|
|
p_repl_lines = strtolinenum(s, &s) -
|
|
p_newfirst + 1;
|
|
if (p_repl_lines < 0)
|
|
malformed();
|
|
} else if (p_newfirst)
|
|
p_repl_lines = 1;
|
|
else {
|
|
p_repl_lines = 0;
|
|
p_newfirst = 1;
|
|
}
|
|
if (p_newfirst >= LINENUM_MAX - p_repl_lines ||
|
|
p_repl_lines >= LINENUM_MAX - p_end)
|
|
malformed();
|
|
p_max = p_repl_lines + p_end;
|
|
if (p_max > MAXHUNKSIZE)
|
|
fatal("hunk too large (%ld lines) at line %ld: %s",
|
|
p_max, p_input_line, buf);
|
|
while (p_max >= hunkmax)
|
|
grow_hunkmax();
|
|
if (p_repl_lines != ptrn_copiable &&
|
|
(p_context != 0 || p_repl_lines != 1))
|
|
repl_could_be_missing = false;
|
|
break;
|
|
}
|
|
goto change_line;
|
|
case '+':
|
|
case '!':
|
|
repl_could_be_missing = false;
|
|
change_line:
|
|
if (buf[1] == '\n' && canonicalize)
|
|
strlcpy(buf + 1, " \n", buf_size - 1);
|
|
if (!isspace((unsigned char)buf[1]) &&
|
|
buf[1] != '>' && buf[1] != '<' &&
|
|
repl_beginning && repl_could_be_missing) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
if (context >= 0) {
|
|
if (context < p_context)
|
|
p_context = context;
|
|
context = -1000;
|
|
}
|
|
p_line[p_end] = savestr(buf + 2);
|
|
if (out_of_mem) {
|
|
p_end--;
|
|
return false;
|
|
}
|
|
if (p_end == p_ptrn_lines) {
|
|
if (remove_special_line()) {
|
|
int l;
|
|
|
|
l = strlen(p_line[p_end]) - 1;
|
|
(p_line[p_end])[l] = 0;
|
|
}
|
|
}
|
|
break;
|
|
case '\t':
|
|
case '\n': /* assume the 2 spaces got eaten */
|
|
if (repl_beginning && repl_could_be_missing &&
|
|
(!ptrn_spaces_eaten ||
|
|
diff_type == NEW_CONTEXT_DIFF)) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
p_line[p_end] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end--;
|
|
return false;
|
|
}
|
|
if (p_end != p_ptrn_lines + 1) {
|
|
ptrn_spaces_eaten |= (repl_beginning != 0);
|
|
context++;
|
|
if (!repl_beginning)
|
|
ptrn_copiable++;
|
|
p_char[p_end] = ' ';
|
|
}
|
|
break;
|
|
case ' ':
|
|
if (!isspace((unsigned char)buf[1]) &&
|
|
repl_beginning && repl_could_be_missing) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
context++;
|
|
if (!repl_beginning)
|
|
ptrn_copiable++;
|
|
p_line[p_end] = savestr(buf + 2);
|
|
if (out_of_mem) {
|
|
p_end--;
|
|
return false;
|
|
}
|
|
break;
|
|
default:
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = true;
|
|
goto hunk_done;
|
|
}
|
|
malformed();
|
|
}
|
|
/* set up p_len for strncmp() so we don't have to */
|
|
/* assume null termination */
|
|
if (p_line[p_end])
|
|
p_len[p_end] = strlen(p_line[p_end]);
|
|
else
|
|
p_len[p_end] = 0;
|
|
}
|
|
|
|
hunk_done:
|
|
if (p_end >= 0 && !repl_beginning)
|
|
fatal("no --- found in patch at line %ld\n", pch_hunk_beg());
|
|
|
|
if (repl_missing) {
|
|
|
|
/* reset state back to just after --- */
|
|
p_input_line = repl_patch_line;
|
|
for (p_end--; p_end > repl_beginning; p_end--)
|
|
free(p_line[p_end]);
|
|
fseeko(pfp, repl_backtrack_position, SEEK_SET);
|
|
|
|
/* redundant 'new' context lines were omitted - set */
|
|
/* up to fill them in from the old file context */
|
|
if (!p_context && p_repl_lines == 1) {
|
|
p_repl_lines = 0;
|
|
p_max--;
|
|
}
|
|
fillsrc = 1;
|
|
filldst = repl_beginning + 1;
|
|
fillcnt = p_repl_lines;
|
|
p_end = p_max;
|
|
} else if (!p_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;
|
|
}
|
|
if (diff_type == CONTEXT_DIFF &&
|
|
(fillcnt || (p_first > 1 && ptrn_copiable > 2 * p_context))) {
|
|
if (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 = 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 && p_char[fillsrc] != ' ')
|
|
fillsrc++;
|
|
if (fillsrc > p_end)
|
|
fatal("replacement text or line numbers mangled in hunk at line %ld\n",
|
|
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 &&
|
|
p_char[fillsrc] != ' ')
|
|
fillsrc++;
|
|
#ifdef DEBUGGING
|
|
if (debug & 64)
|
|
printf("fillsrc %ld, filldst %ld, rb %ld, e+1 %ld\n",
|
|
fillsrc, filldst, repl_beginning, p_end + 1);
|
|
#endif
|
|
if (fillsrc != p_end + 1 && fillsrc != repl_beginning)
|
|
malformed();
|
|
if (filldst != p_end + 1 && filldst != repl_beginning)
|
|
malformed();
|
|
}
|
|
if (p_line[p_end] != NULL) {
|
|
if (remove_special_line()) {
|
|
p_len[p_end] -= 1;
|
|
(p_line[p_end])[p_len[p_end]] = 0;
|
|
}
|
|
}
|
|
} else if (diff_type == UNI_DIFF) {
|
|
LINENUM fillold; /* index of old lines */
|
|
LINENUM fillnew; /* index of new lines */
|
|
char ch;
|
|
|
|
line_beginning = ftello(pfp); /* file pos of the current line */
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0 || strnNE(buf, "@@ -", 4)) {
|
|
next_intuit_at(line_beginning, p_input_line);
|
|
return false;
|
|
}
|
|
s = buf + 4;
|
|
if (!*s)
|
|
malformed();
|
|
p_first = strtolinenum(s, &s);
|
|
if (*s == ',') {
|
|
p_ptrn_lines = strtolinenum(s + 1, &s);
|
|
} else
|
|
p_ptrn_lines = 1;
|
|
if (*s == ' ')
|
|
s++;
|
|
if (*s != '+' || !*++s)
|
|
malformed();
|
|
p_newfirst = strtolinenum(s, &s);
|
|
if (*s == ',') {
|
|
p_repl_lines = strtolinenum(s + 1, &s);
|
|
} else
|
|
p_repl_lines = 1;
|
|
if (*s == ' ')
|
|
s++;
|
|
if (*s != '@')
|
|
malformed();
|
|
if (p_first >= LINENUM_MAX - p_ptrn_lines ||
|
|
p_newfirst > LINENUM_MAX - p_repl_lines ||
|
|
p_ptrn_lines >= LINENUM_MAX - p_repl_lines - 1)
|
|
malformed();
|
|
if (!p_ptrn_lines)
|
|
p_first++; /* do append rather than insert */
|
|
p_max = p_ptrn_lines + p_repl_lines + 1;
|
|
while (p_max >= hunkmax)
|
|
grow_hunkmax();
|
|
fillold = 1;
|
|
fillnew = fillold + p_ptrn_lines;
|
|
p_end = fillnew + p_repl_lines;
|
|
snprintf(buf, buf_size, "*** %ld,%ld ****\n", p_first,
|
|
p_first + p_ptrn_lines - 1);
|
|
p_line[0] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = -1;
|
|
return false;
|
|
}
|
|
p_char[0] = '*';
|
|
snprintf(buf, buf_size, "--- %ld,%ld ----\n", p_newfirst,
|
|
p_newfirst + p_repl_lines - 1);
|
|
p_line[fillnew] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = 0;
|
|
return false;
|
|
}
|
|
p_char[fillnew++] = '=';
|
|
p_context = 100;
|
|
context = 0;
|
|
p_hunk_beg = p_input_line + 1;
|
|
while (fillold <= p_ptrn_lines || fillnew <= p_end) {
|
|
line_beginning = ftello(pfp);
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0) {
|
|
if (p_max - fillnew < 3) {
|
|
/* assume blank lines got chopped */
|
|
strlcpy(buf, " \n", buf_size);
|
|
} else {
|
|
fatal("unexpected end of file in patch\n");
|
|
}
|
|
}
|
|
if (*buf == '\t' || *buf == '\n') {
|
|
ch = ' '; /* assume the space got eaten */
|
|
s = savestr(buf);
|
|
} else {
|
|
ch = *buf;
|
|
s = savestr(buf + 1);
|
|
}
|
|
if (out_of_mem) {
|
|
while (--fillnew > p_ptrn_lines)
|
|
free(p_line[fillnew]);
|
|
p_end = fillold - 1;
|
|
return false;
|
|
}
|
|
switch (ch) {
|
|
case '-':
|
|
if (fillold > p_ptrn_lines) {
|
|
free(s);
|
|
p_end = fillnew - 1;
|
|
malformed();
|
|
}
|
|
p_char[fillold] = ch;
|
|
p_line[fillold] = s;
|
|
p_len[fillold++] = strlen(s);
|
|
if (fillold > p_ptrn_lines) {
|
|
if (remove_special_line()) {
|
|
p_len[fillold - 1] -= 1;
|
|
s[p_len[fillold - 1]] = 0;
|
|
}
|
|
}
|
|
break;
|
|
case '=':
|
|
ch = ' ';
|
|
/* FALL THROUGH */
|
|
case ' ':
|
|
if (fillold > p_ptrn_lines) {
|
|
free(s);
|
|
while (--fillnew > p_ptrn_lines)
|
|
free(p_line[fillnew]);
|
|
p_end = fillold - 1;
|
|
malformed();
|
|
}
|
|
context++;
|
|
p_char[fillold] = ch;
|
|
p_line[fillold] = s;
|
|
p_len[fillold++] = strlen(s);
|
|
s = savestr(s);
|
|
if (out_of_mem) {
|
|
while (--fillnew > p_ptrn_lines)
|
|
free(p_line[fillnew]);
|
|
p_end = fillold - 1;
|
|
return false;
|
|
}
|
|
if (fillold > p_ptrn_lines) {
|
|
if (remove_special_line()) {
|
|
p_len[fillold - 1] -= 1;
|
|
s[p_len[fillold - 1]] = 0;
|
|
}
|
|
}
|
|
/* FALL THROUGH */
|
|
case '+':
|
|
if (fillnew > p_end) {
|
|
free(s);
|
|
while (--fillnew > p_ptrn_lines)
|
|
free(p_line[fillnew]);
|
|
p_end = fillold - 1;
|
|
malformed();
|
|
}
|
|
p_char[fillnew] = ch;
|
|
p_line[fillnew] = s;
|
|
p_len[fillnew++] = strlen(s);
|
|
if (fillold > p_ptrn_lines) {
|
|
if (remove_special_line()) {
|
|
p_len[fillnew - 1] -= 1;
|
|
s[p_len[fillnew - 1]] = 0;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
p_end = fillnew;
|
|
malformed();
|
|
}
|
|
if (ch != ' ' && context > 0) {
|
|
if (context < p_context)
|
|
p_context = context;
|
|
context = -1000;
|
|
}
|
|
} /* while */
|
|
} else { /* normal diff--fake it up */
|
|
char hunk_type;
|
|
int i;
|
|
LINENUM min, max;
|
|
|
|
line_beginning = ftello(pfp);
|
|
p_context = 0;
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0 || !isdigit((unsigned char)*buf)) {
|
|
next_intuit_at(line_beginning, p_input_line);
|
|
return false;
|
|
}
|
|
p_first = strtolinenum(buf, &s);
|
|
if (*s == ',') {
|
|
p_ptrn_lines = strtolinenum(s + 1, &s) - p_first + 1;
|
|
if (p_ptrn_lines < 0)
|
|
malformed();
|
|
} else
|
|
p_ptrn_lines = (*s != 'a');
|
|
hunk_type = *s;
|
|
if (hunk_type == 'a')
|
|
p_first++; /* do append rather than insert */
|
|
min = strtolinenum(s + 1, &s);
|
|
if (*s == ',')
|
|
max = strtolinenum(s + 1, &s);
|
|
else
|
|
max = min;
|
|
if (min < 0 || min > max || max - min == LINENUM_MAX)
|
|
malformed();
|
|
if (hunk_type == 'd')
|
|
min++;
|
|
p_newfirst = min;
|
|
p_repl_lines = max - min + 1;
|
|
if (p_newfirst > LINENUM_MAX - p_repl_lines ||
|
|
p_ptrn_lines >= LINENUM_MAX - p_repl_lines - 1)
|
|
malformed();
|
|
p_end = p_ptrn_lines + p_repl_lines + 1;
|
|
if (p_end > MAXHUNKSIZE)
|
|
fatal("hunk too large (%ld lines) at line %ld: %s",
|
|
p_end, p_input_line, buf);
|
|
while (p_end >= hunkmax)
|
|
grow_hunkmax();
|
|
snprintf(buf, buf_size, "*** %ld,%ld\n", p_first,
|
|
p_first + p_ptrn_lines - 1);
|
|
p_line[0] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = -1;
|
|
return false;
|
|
}
|
|
p_char[0] = '*';
|
|
for (i = 1; i <= p_ptrn_lines; i++) {
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0)
|
|
fatal("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '<')
|
|
fatal("< expected at line %ld of patch\n",
|
|
p_input_line);
|
|
p_line[i] = savestr(buf + 2);
|
|
if (out_of_mem) {
|
|
p_end = i - 1;
|
|
return false;
|
|
}
|
|
p_len[i] = strlen(p_line[i]);
|
|
p_char[i] = '-';
|
|
}
|
|
|
|
if (remove_special_line()) {
|
|
p_len[i - 1] -= 1;
|
|
(p_line[i - 1])[p_len[i - 1]] = 0;
|
|
}
|
|
if (hunk_type == 'c') {
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0)
|
|
fatal("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '-')
|
|
fatal("--- expected at line %ld of patch\n",
|
|
p_input_line);
|
|
}
|
|
snprintf(buf, buf_size, "--- %ld,%ld\n", min, max);
|
|
p_line[i] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = i - 1;
|
|
return false;
|
|
}
|
|
p_char[i] = '=';
|
|
for (i++; i <= p_end; i++) {
|
|
len = pgets(true);
|
|
p_input_line++;
|
|
if (len == 0)
|
|
fatal("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '>')
|
|
fatal("> expected at line %ld of patch\n",
|
|
p_input_line);
|
|
/* Don't overrun if we don't have enough line */
|
|
if (len > 2)
|
|
p_line[i] = savestr(buf + 2);
|
|
else
|
|
p_line[i] = savestr("");
|
|
|
|
if (out_of_mem) {
|
|
p_end = i - 1;
|
|
return false;
|
|
}
|
|
p_len[i] = strlen(p_line[i]);
|
|
p_char[i] = '+';
|
|
}
|
|
|
|
if (remove_special_line()) {
|
|
p_len[i - 1] -= 1;
|
|
(p_line[i - 1])[p_len[i - 1]] = 0;
|
|
}
|
|
}
|
|
if (reverse) /* backwards patch? */
|
|
if (!pch_swap())
|
|
say("Not enough memory to swap next hunk!\n");
|
|
#ifdef DEBUGGING
|
|
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 %s", i, p_char[i],
|
|
special, p_line[i]);
|
|
fflush(stderr);
|
|
}
|
|
}
|
|
#endif
|
|
if (p_end + 1 < hunkmax)/* paranoia reigns supreme... */
|
|
p_char[p_end + 1] = '^'; /* add a stopper for apply_hunk */
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Input a line from the patch file.
|
|
* Worry about indentation if do_indent is true.
|
|
* The line is read directly into the buf global variable which
|
|
* is resized if necessary in order to hold the complete line.
|
|
* Returns the number of characters read including the terminating
|
|
* '\n', if any.
|
|
*/
|
|
size_t
|
|
pgets(bool do_indent)
|
|
{
|
|
char *line;
|
|
size_t len = 0;
|
|
int indent = 0, skipped = 0;
|
|
|
|
line = fgetln(pfp, &len);
|
|
if (line != NULL) {
|
|
if (len + 1 > buf_size) {
|
|
while (len + 1 > buf_size)
|
|
buf_size *= 2;
|
|
free(buf);
|
|
buf = malloc(buf_size);
|
|
if (buf == NULL)
|
|
fatal("out of memory\n");
|
|
}
|
|
if (do_indent == 1 && p_indent) {
|
|
for (;
|
|
indent < p_indent && (*line == ' ' || *line == '\t' || *line == 'X');
|
|
line++, skipped++) {
|
|
if (*line == '\t')
|
|
indent += 8 - (indent %7);
|
|
else
|
|
indent++;
|
|
}
|
|
}
|
|
memcpy(buf, line, len - skipped);
|
|
buf[len - skipped] = '\0';
|
|
}
|
|
return len;
|
|
}
|
|
|
|
|
|
/*
|
|
* Reverse the old and new portions of the current hunk.
|
|
*/
|
|
bool
|
|
pch_swap(void)
|
|
{
|
|
char **tp_line; /* the text of the hunk */
|
|
unsigned short *tp_len;/* length of each line */
|
|
char *tp_char; /* +, -, and ! */
|
|
LINENUM i;
|
|
LINENUM n;
|
|
bool blankline = false;
|
|
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 = NULL; /* force set_hunkmax to allocate again */
|
|
p_len = NULL;
|
|
p_char = NULL;
|
|
set_hunkmax();
|
|
if (p_line == NULL || p_len == NULL || p_char == NULL) {
|
|
|
|
free(p_line);
|
|
p_line = tp_line;
|
|
free(p_len);
|
|
p_len = tp_len;
|
|
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++;
|
|
}
|
|
if (p_char[0] != '=')
|
|
fatal("Malformed patch at line %ld: expected '=' found '%c'\n",
|
|
p_input_line, p_char[0]);
|
|
p_char[0] = '*';
|
|
for (s = p_line[0]; *s; s++)
|
|
if (*s == '-')
|
|
*s = '*';
|
|
|
|
/* now turn the old into the new */
|
|
|
|
if (p_char[0] != '*')
|
|
fatal("Malformed patch at line %ld: expected '*' found '%c'\n",
|
|
p_input_line, p_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];
|
|
}
|
|
|
|
if (i != p_ptrn_lines + 1)
|
|
fatal("Malformed patch at line %ld: expected %ld lines, "
|
|
"got %ld\n",
|
|
p_input_line, p_ptrn_lines + 1, i);
|
|
|
|
i = p_ptrn_lines;
|
|
p_ptrn_lines = p_repl_lines;
|
|
p_repl_lines = i;
|
|
|
|
free(tp_line);
|
|
free(tp_len);
|
|
free(tp_char);
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Return the specified line position in the old file of the old context.
|
|
*/
|
|
LINENUM
|
|
pch_first(void)
|
|
{
|
|
return p_first;
|
|
}
|
|
|
|
/*
|
|
* Return the number of lines of old context.
|
|
*/
|
|
LINENUM
|
|
pch_ptrn_lines(void)
|
|
{
|
|
return p_ptrn_lines;
|
|
}
|
|
|
|
/*
|
|
* Return the probable line position in the new file of the first line.
|
|
*/
|
|
LINENUM
|
|
pch_newfirst(void)
|
|
{
|
|
return p_newfirst;
|
|
}
|
|
|
|
/*
|
|
* Return the number of lines in the replacement text including context.
|
|
*/
|
|
LINENUM
|
|
pch_repl_lines(void)
|
|
{
|
|
return p_repl_lines;
|
|
}
|
|
|
|
/*
|
|
* Return the number of lines in the whole hunk.
|
|
*/
|
|
LINENUM
|
|
pch_end(void)
|
|
{
|
|
return p_end;
|
|
}
|
|
|
|
/*
|
|
* Return the number of context lines before the first changed line.
|
|
*/
|
|
LINENUM
|
|
pch_context(void)
|
|
{
|
|
return p_context;
|
|
}
|
|
|
|
/*
|
|
* Return the length of a particular patch line.
|
|
*/
|
|
unsigned short
|
|
pch_line_len(LINENUM line)
|
|
{
|
|
return p_len[line];
|
|
}
|
|
|
|
/*
|
|
* Return the control character (+, -, *, !, etc) for a patch line.
|
|
*/
|
|
char
|
|
pch_char(LINENUM line)
|
|
{
|
|
return p_char[line];
|
|
}
|
|
|
|
/*
|
|
* Return a pointer to a particular patch line.
|
|
*/
|
|
char *
|
|
pfetch(LINENUM line)
|
|
{
|
|
return p_line[line];
|
|
}
|
|
|
|
/*
|
|
* Return where in the patch file this hunk began, for error messages.
|
|
*/
|
|
LINENUM
|
|
pch_hunk_beg(void)
|
|
{
|
|
return p_hunk_beg;
|
|
}
|
|
|
|
/*
|
|
* Apply an ed script by feeding ed itself.
|
|
*/
|
|
void
|
|
do_ed_script(void)
|
|
{
|
|
char *t;
|
|
off_t beginning_of_this_line;
|
|
FILE *pipefp = NULL;
|
|
int continuation;
|
|
|
|
if (!skip_rest_of_patch) {
|
|
if (copy_file(filearg[0], TMPOUTNAME) < 0) {
|
|
unlink(TMPOUTNAME);
|
|
fatal("can't create temp file %s", TMPOUTNAME);
|
|
}
|
|
snprintf(buf, buf_size, "%s%s%s", _PATH_RED,
|
|
verbose ? " " : " -s ", TMPOUTNAME);
|
|
pipefp = popen(buf, "w");
|
|
}
|
|
for (;;) {
|
|
beginning_of_this_line = ftello(pfp);
|
|
if (pgets(true) == 0) {
|
|
next_intuit_at(beginning_of_this_line, p_input_line);
|
|
break;
|
|
}
|
|
p_input_line++;
|
|
for (t = buf; isdigit((unsigned char)*t) || *t == ','; t++)
|
|
;
|
|
/* POSIX defines allowed commands as {a,c,d,i,s} */
|
|
if (isdigit((unsigned char)*buf) &&
|
|
(*t == 'a' || *t == 'c' || *t == 'd' || *t == 'i' || *t == 's')) {
|
|
if (pipefp != NULL)
|
|
fputs(buf, pipefp);
|
|
if (*t == 's') {
|
|
for (;;) {
|
|
continuation = 0;
|
|
t = strchr(buf, '\0') - 1;
|
|
while (--t >= buf && *t == '\\')
|
|
continuation = !continuation;
|
|
if (!continuation ||
|
|
pgets(true) == 0)
|
|
break;
|
|
if (pipefp != NULL)
|
|
fputs(buf, pipefp);
|
|
}
|
|
} else if (*t != 'd') {
|
|
while (pgets(true)) {
|
|
p_input_line++;
|
|
if (pipefp != NULL)
|
|
fputs(buf, pipefp);
|
|
if (strEQ(buf, ".\n"))
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
next_intuit_at(beginning_of_this_line, p_input_line);
|
|
break;
|
|
}
|
|
}
|
|
if (pipefp == NULL)
|
|
return;
|
|
fprintf(pipefp, "w\n");
|
|
fprintf(pipefp, "q\n");
|
|
fflush(pipefp);
|
|
pclose(pipefp);
|
|
ignore_signals();
|
|
if (!check_only) {
|
|
if (move_file(TMPOUTNAME, outname) < 0) {
|
|
toutkeep = true;
|
|
chmod(TMPOUTNAME, filemode);
|
|
} else
|
|
chmod(outname, filemode);
|
|
}
|
|
set_signals(1);
|
|
}
|
|
|
|
/*
|
|
* Choose the name of the file to be patched based on POSIX rules.
|
|
* NOTE: the POSIX rules are amazingly stupid and we only follow them
|
|
* if the user specified --posix or set POSIXLY_CORRECT.
|
|
*/
|
|
static char *
|
|
posix_name(const struct file_name *names, bool assume_exists)
|
|
{
|
|
char *path = NULL;
|
|
int i;
|
|
|
|
/*
|
|
* POSIX states that the filename will be chosen from one
|
|
* of the old, new and index names (in that order) if
|
|
* the file exists relative to CWD after -p stripping.
|
|
*/
|
|
for (i = 0; i < MAX_FILE; i++) {
|
|
if (names[i].path != NULL && names[i].exists) {
|
|
path = names[i].path;
|
|
break;
|
|
}
|
|
}
|
|
if (path == NULL && !assume_exists) {
|
|
/*
|
|
* No files found, check to see if the diff could be
|
|
* creating a new file.
|
|
*/
|
|
if (path == NULL && ok_to_create_file &&
|
|
names[NEW_FILE].path != NULL)
|
|
path = names[NEW_FILE].path;
|
|
}
|
|
|
|
return path ? xstrdup(path) : NULL;
|
|
}
|
|
|
|
static char *
|
|
compare_names(const struct file_name *names, bool assume_exists)
|
|
{
|
|
size_t min_components, min_baselen, min_len, tmp;
|
|
char *best = NULL;
|
|
char *path;
|
|
int i;
|
|
|
|
/*
|
|
* The "best" name is the one with the fewest number of path
|
|
* components, the shortest basename length, and the shortest
|
|
* overall length (in that order). We only use the Index: file
|
|
* if neither of the old or new files could be intuited from
|
|
* the diff header.
|
|
*/
|
|
min_components = min_baselen = min_len = SIZE_MAX;
|
|
for (i = INDEX_FILE; i >= OLD_FILE; i--) {
|
|
path = names[i].path;
|
|
if (path == NULL || (!names[i].exists && !assume_exists))
|
|
continue;
|
|
if ((tmp = num_components(path)) > min_components)
|
|
continue;
|
|
if (tmp < min_components) {
|
|
min_components = tmp;
|
|
best = path;
|
|
}
|
|
if ((tmp = strlen(basename(path))) > min_baselen)
|
|
continue;
|
|
if (tmp < min_baselen) {
|
|
min_baselen = tmp;
|
|
best = path;
|
|
}
|
|
if ((tmp = strlen(path)) > min_len)
|
|
continue;
|
|
min_len = tmp;
|
|
best = path;
|
|
}
|
|
return best;
|
|
}
|
|
|
|
/*
|
|
* Choose the name of the file to be patched based the "best" one
|
|
* available.
|
|
*/
|
|
static char *
|
|
best_name(const struct file_name *names, bool assume_exists)
|
|
{
|
|
char *best;
|
|
|
|
best = compare_names(names, assume_exists);
|
|
|
|
/* No match? Check to see if the diff could be creating a new file. */
|
|
if (best == NULL && ok_to_create_file)
|
|
best = names[NEW_FILE].path;
|
|
|
|
return best ? xstrdup(best) : NULL;
|
|
}
|
|
|
|
static size_t
|
|
num_components(const char *path)
|
|
{
|
|
size_t n;
|
|
const char *cp;
|
|
|
|
for (n = 0, cp = path; (cp = strchr(cp, '/')) != NULL; n++, cp++) {
|
|
while (*cp == '/')
|
|
cp++; /* skip consecutive slashes */
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Convert number at NPTR into LINENUM and save address of first
|
|
* character that is not a digit in ENDPTR. If conversion is not
|
|
* possible, call fatal.
|
|
*/
|
|
static LINENUM
|
|
strtolinenum(char *nptr, char **endptr)
|
|
{
|
|
LINENUM rv;
|
|
char c;
|
|
char *p;
|
|
const char *errstr;
|
|
|
|
for (p = nptr; isdigit((unsigned char)*p); p++)
|
|
;
|
|
|
|
if (p == nptr)
|
|
malformed();
|
|
|
|
c = *p;
|
|
*p = '\0';
|
|
|
|
rv = strtonum(nptr, 0, LINENUM_MAX, &errstr);
|
|
if (errstr != NULL)
|
|
fatal("invalid line number at line %ld: `%s' is %s\n",
|
|
p_input_line, nptr, errstr);
|
|
|
|
*p = c;
|
|
*endptr = p;
|
|
|
|
return rv;
|
|
}
|