1318 lines
33 KiB
C
1318 lines
33 KiB
C
/* $Header: /home/cvs/386BSD/src/gnu/usr.bin/patch/pch.c,v 1.3 1994/02/17 22:20:36 jkh Exp $
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*
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* $Log: pch.c,v $
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* Revision 1.3 1994/02/17 22:20:36 jkh
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* Put this back - I was somehow under the erroneous impression that patch was in
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* ports, until I saw the the commit messages, that is! :-) All changed backed out.
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*
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* Revision 1.2 1994/02/17 22:16:05 jkh
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* From Poul-Henning Kamp - Implement a -C option to verify the integrity of
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* a patch before actually applying it.
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*
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* Revision 1.1.1.1 1993/06/19 14:21:52 paul
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* b-maked patch-2.10
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*
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* Revision 2.0.2.0 90/05/01 22:17:51 davison
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* patch12u: unidiff support added
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*
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* Revision 2.0.1.7 88/06/03 15:13:28 lwall
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* patch10: Can now find patches in shar scripts.
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* patch10: Hunks that swapped and then swapped back could core dump.
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*
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* Revision 2.0.1.6 87/06/04 16:18:13 lwall
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* pch_swap didn't swap p_bfake and p_efake.
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*
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* Revision 2.0.1.5 87/01/30 22:47:42 lwall
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* Improved responses to mangled patches.
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*
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* Revision 2.0.1.4 87/01/05 16:59:53 lwall
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* New-style context diffs caused double call to free().
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*
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* Revision 2.0.1.3 86/11/14 10:08:33 lwall
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* Fixed problem where a long pattern wouldn't grow the hunk.
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* Also restored p_input_line when backtracking so error messages are right.
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*
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* Revision 2.0.1.2 86/11/03 17:49:52 lwall
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* New-style delete triggers spurious assertion error.
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*
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* Revision 2.0.1.1 86/10/29 15:52:08 lwall
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* Could falsely report new-style context diff.
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*
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* Revision 2.0 86/09/17 15:39:37 lwall
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* Baseline for netwide release.
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*
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*/
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#include "EXTERN.h"
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#include "common.h"
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#include "util.h"
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#include "INTERN.h"
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#include "pch.h"
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/* Patch (diff listing) abstract type. */
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static long 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(char**); /* the text of the hunk */
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static short *p_len = Null(short*); /* length of each line */
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static char *p_Char = Nullch; /* +, -, 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 LINENUM p_base; /* where to intuit this time */
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static LINENUM p_bline; /* line # of p_base */
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static LINENUM 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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/* 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 = Nulline;
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p_newfirst = Nulline;
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p_ptrn_lines = Nulline;
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p_repl_lines = Nulline;
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p_end = (LINENUM)-1;
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p_max = Nulline;
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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 *filename;
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{
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if (filename == Nullch || !*filename || strEQ(filename, "-")) {
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pfp = fopen(TMPPATNAME, "w");
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if (pfp == Nullfp)
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pfatal2("can't create %s", TMPPATNAME);
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while (fgets(buf, sizeof buf, stdin) != Nullch)
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fputs(buf, pfp);
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Fclose(pfp);
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filename = TMPPATNAME;
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}
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pfp = fopen(filename, "r");
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if (pfp == Nullfp)
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pfatal2("patch file %s not found", filename);
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Fstat(fileno(pfp), &filestat);
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p_filesize = filestat.st_size;
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next_intuit_at(0L,1L); /* start at the beginning */
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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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#ifndef lint
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if (p_line == Null(char**))
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p_line = (char**) malloc((MEM)hunkmax * sizeof(char *));
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if (p_len == Null(short*))
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p_len = (short*) malloc((MEM)hunkmax * sizeof(short));
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#endif
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if (p_Char == Nullch)
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p_Char = (char*) malloc((MEM)hunkmax * sizeof(char));
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}
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/* Enlarge the arrays containing the current hunk of patch. */
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void
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grow_hunkmax()
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{
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hunkmax *= 2;
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/*
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* Note that on most systems, only the p_line array ever gets fresh memory
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* since p_len can move into p_line's old space, and p_Char can move into
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* p_len's old space. Not on PDP-11's however. But it doesn't matter.
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*/
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assert(p_line != Null(char**) && p_len != Null(short*) && p_Char != Nullch);
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#ifndef lint
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p_line = (char**) realloc((char*)p_line, (MEM)hunkmax * sizeof(char *));
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p_len = (short*) realloc((char*)p_len, (MEM)hunkmax * sizeof(short));
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p_Char = (char*) realloc((char*)p_Char, (MEM)hunkmax * sizeof(char));
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#endif
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if (p_line != Null(char**) && p_len != Null(short*) && p_Char != Nullch)
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return;
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if (!using_plan_a)
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fatal1("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()
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{
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if (p_base != 0L && p_base >= p_filesize) {
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if (verbose)
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say1("done\n");
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return FALSE;
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}
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if (verbose)
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say1("Hmm...");
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diff_type = intuit_diff_type();
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if (!diff_type) {
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if (p_base != 0L) {
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if (verbose)
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say1(" Ignoring the trailing garbage.\ndone\n");
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}
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else
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say1(" 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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say3(" %sooks like %s to me...\n",
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(p_base == 0L ? "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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say3("(Patch is indented %d space%s.)\n", p_indent, p_indent==1?"":"s");
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skip_to(p_start,p_sline);
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while (filearg[0] == Nullch) {
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if (force || batch) {
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say1("No file to patch. Skipping...\n");
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filearg[0] = savestr(bestguess);
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skip_rest_of_patch = TRUE;
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return TRUE;
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}
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ask1("File to patch: ");
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if (*buf != '\n') {
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if (bestguess)
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free(bestguess);
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bestguess = savestr(buf);
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filearg[0] = fetchname(buf, 0, FALSE);
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}
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if (filearg[0] == Nullch) {
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ask1("No file found--skip this patch? [n] ");
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if (*buf != 'y') {
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continue;
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}
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if (verbose)
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say1("Skipping patch...\n");
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filearg[0] = fetchname(bestguess, 0, TRUE);
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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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/* Determine what kind of diff is in the remaining part of the patch file. */
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int
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intuit_diff_type()
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{
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Reg4 long this_line = 0;
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Reg5 long previous_line;
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Reg6 long first_command_line = -1;
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long fcl_line;
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Reg7 bool last_line_was_command = FALSE;
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Reg8 bool this_is_a_command = FALSE;
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Reg9 bool stars_last_line = FALSE;
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Reg10 bool stars_this_line = FALSE;
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Reg3 int indent;
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Reg1 char *s;
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Reg2 char *t;
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char *indtmp = Nullch;
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char *oldtmp = Nullch;
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char *newtmp = Nullch;
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char *indname = Nullch;
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char *oldname = Nullch;
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char *newname = Nullch;
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Reg11 int retval;
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bool no_filearg = (filearg[0] == Nullch);
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ok_to_create_file = FALSE;
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Fseek(pfp, p_base, 0);
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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 = ftell(pfp);
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indent = 0;
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p_input_line++;
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if (fgets(buf, sizeof buf, pfp) == Nullch) {
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if (first_command_line >= 0L) {
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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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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(*t) || *t == ','; t++) ;
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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 < 0L && 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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oldtmp = savestr(s+4);
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else if (strnEQ(s, "--- ", 4))
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newtmp = savestr(s+4);
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else if (strnEQ(s, "+++ ", 4))
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oldtmp = savestr(s+4); /* pretend it is the old name */
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else if (strnEQ(s, "Index:", 6))
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indtmp = savestr(s+6);
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else if (strnEQ(s, "Prereq:", 7)) {
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for (t=s+7; isspace(*t); t++) ;
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revision = savestr(t);
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for (t=revision; *t && !isspace(*t); t++) ;
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*t = '\0';
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if (!*revision) {
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free(revision);
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revision = Nullch;
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}
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}
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if ((!diff_type || diff_type == ED_DIFF) &&
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first_command_line >= 0L &&
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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 (!atol(s+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 (!atol(s+4))
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ok_to_create_file = TRUE;
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/* if this is a new context diff the character just before */
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/* the newline is a '*'. */
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while (*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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}
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scan_exit:
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if (no_filearg) {
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if (indtmp != Nullch)
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indname = fetchname(indtmp, strippath, ok_to_create_file);
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if (oldtmp != Nullch)
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oldname = fetchname(oldtmp, strippath, ok_to_create_file);
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if (newtmp != Nullch)
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newname = fetchname(newtmp, strippath, ok_to_create_file);
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if (oldname && newname) {
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if (strlen(oldname) < strlen(newname))
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filearg[0] = savestr(oldname);
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else
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filearg[0] = savestr(newname);
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}
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else if (oldname)
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filearg[0] = savestr(oldname);
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else if (newname)
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filearg[0] = savestr(newname);
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else if (indname)
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filearg[0] = savestr(indname);
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}
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if (bestguess) {
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free(bestguess);
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bestguess = Nullch;
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}
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if (filearg[0] != Nullch)
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bestguess = savestr(filearg[0]);
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else if (indtmp != Nullch)
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bestguess = fetchname(indtmp, strippath, TRUE);
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else {
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if (oldtmp != Nullch)
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oldname = fetchname(oldtmp, strippath, TRUE);
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if (newtmp != Nullch)
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newname = fetchname(newtmp, strippath, TRUE);
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if (oldname && newname) {
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if (strlen(oldname) < strlen(newname))
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bestguess = savestr(oldname);
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else
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bestguess = savestr(newname);
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}
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else if (oldname)
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bestguess = savestr(oldname);
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else if (newname)
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bestguess = savestr(newname);
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}
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if (indtmp != Nullch)
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free(indtmp);
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if (oldtmp != Nullch)
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free(oldtmp);
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if (newtmp != Nullch)
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free(newtmp);
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if (indname != Nullch)
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free(indname);
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if (oldname != Nullch)
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free(oldname);
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if (newname != Nullch)
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free(newname);
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return retval;
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}
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/* Remember where this patch ends so we know where to start up again. */
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|
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void
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next_intuit_at(file_pos,file_line)
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long file_pos;
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long file_line;
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{
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p_base = file_pos;
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p_bline = file_line;
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}
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|
|
|
/* Basically a verbose fseek() to the actual diff listing. */
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|
|
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void
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skip_to(file_pos,file_line)
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long file_pos;
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long file_line;
|
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{
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char *ret;
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|
|
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assert(p_base <= file_pos);
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|
if (verbose && p_base < file_pos) {
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|
Fseek(pfp, p_base, 0);
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|
say1("The text leading up to this was:\n--------------------------\n");
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while (ftell(pfp) < file_pos) {
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|
ret = fgets(buf, sizeof buf, pfp);
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assert(ret != Nullch);
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|
say2("|%s", buf);
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}
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say1("--------------------------\n");
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|
}
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else
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|
Fseek(pfp, file_pos, 0);
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|
p_input_line = file_line - 1;
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|
}
|
|
|
|
/* Make this a function for better debugging. */
|
|
static void
|
|
malformed ()
|
|
{
|
|
fatal3("malformed patch at line %ld: %s", p_input_line, buf);
|
|
/* about as informative as "Syntax error" in C */
|
|
}
|
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|
|
/* True if there is more of the current diff listing to process. */
|
|
|
|
bool
|
|
another_hunk()
|
|
{
|
|
Reg1 char *s;
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|
Reg8 char *ret;
|
|
Reg2 int context = 0;
|
|
|
|
while (p_end >= 0) {
|
|
if (p_end == p_efake)
|
|
p_end = p_bfake; /* don't free twice */
|
|
else
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|
free(p_line[p_end]);
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|
p_end--;
|
|
}
|
|
assert(p_end == -1);
|
|
p_efake = -1;
|
|
|
|
p_max = hunkmax; /* gets reduced when --- found */
|
|
if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) {
|
|
long line_beginning = ftell(pfp);
|
|
/* file pos of the current line */
|
|
LINENUM repl_beginning = 0; /* index of --- line */
|
|
Reg4 LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */
|
|
Reg5 LINENUM fillsrc; /* index of first line to copy */
|
|
Reg6 LINENUM filldst; /* index of first missing line */
|
|
bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */
|
|
Reg9 bool repl_could_be_missing = TRUE;
|
|
/* no + or ! lines in this hunk */
|
|
bool repl_missing = FALSE; /* we are now backtracking */
|
|
long repl_backtrack_position = 0;
|
|
/* file pos of first repl line */
|
|
LINENUM repl_patch_line; /* input line number for same */
|
|
Reg7 LINENUM ptrn_copiable = 0;
|
|
/* # of copiable lines in ptrn */
|
|
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch || 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 = ftell(pfp);
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch) {
|
|
if (p_max - p_end < 4)
|
|
Strcpy(buf, " \n"); /* assume blank lines got chopped */
|
|
else {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
fatal1("unexpected end of file in patch\n");
|
|
}
|
|
}
|
|
p_end++;
|
|
assert(p_end < hunkmax);
|
|
p_Char[p_end] = *buf;
|
|
#ifdef zilog
|
|
p_line[(short)p_end] = Nullch;
|
|
#else
|
|
p_line[p_end] = Nullch;
|
|
#endif
|
|
switch (*buf) {
|
|
case '*':
|
|
if (strnEQ(buf, "********", 8)) {
|
|
if (repl_beginning && repl_could_be_missing) {
|
|
repl_missing = TRUE;
|
|
goto hunk_done;
|
|
}
|
|
else
|
|
fatal2("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;
|
|
}
|
|
fatal3("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(*s); s++) ;
|
|
if (!*s)
|
|
malformed ();
|
|
if (strnEQ(s,"0,0",3))
|
|
strcpy(s,s+2);
|
|
p_first = (LINENUM) atol(s);
|
|
while (isdigit(*s)) s++;
|
|
if (*s == ',') {
|
|
for (; *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)
|
|
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;
|
|
}
|
|
fatal3(
|
|
"duplicate \"---\" at line %ld--check line numbers at line %ld\n",
|
|
p_input_line, p_hunk_beg + repl_beginning);
|
|
}
|
|
else {
|
|
fatal4(
|
|
"%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 = ftell(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(*s); s++) ;
|
|
if (!*s)
|
|
malformed ();
|
|
p_newfirst = (LINENUM) atol(s);
|
|
while (isdigit(*s)) s++;
|
|
if (*s == ',') {
|
|
for (; *s && !isdigit(*s); s++) ;
|
|
if (!*s)
|
|
malformed ();
|
|
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;
|
|
if (p_max > MAXHUNKSIZE)
|
|
fatal4("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)
|
|
strcpy(buf+1," \n");
|
|
if (!isspace(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;
|
|
}
|
|
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(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)
|
|
fatal2("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]);
|
|
Fseek(pfp, repl_backtrack_position, 0);
|
|
|
|
/* 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)
|
|
say4("%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)
|
|
fatal2("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
|
|
assert(fillsrc==p_end+1 || fillsrc==repl_beginning);
|
|
assert(filldst==p_end+1 || filldst==repl_beginning);
|
|
}
|
|
}
|
|
else if (diff_type == UNI_DIFF) {
|
|
long line_beginning = ftell(pfp);
|
|
/* file pos of the current line */
|
|
Reg4 LINENUM fillsrc; /* index of old lines */
|
|
Reg5 LINENUM filldst; /* index of new lines */
|
|
char ch;
|
|
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch || strnNE(buf, "@@ -", 4)) {
|
|
next_intuit_at(line_beginning,p_input_line);
|
|
return FALSE;
|
|
}
|
|
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 */
|
|
p_max = p_ptrn_lines + p_repl_lines + 1;
|
|
while (p_max >= hunkmax)
|
|
grow_hunkmax();
|
|
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_line[0] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = -1;
|
|
return FALSE;
|
|
}
|
|
p_Char[0] = '*';
|
|
Sprintf(buf,"--- %ld,%ld ----\n",p_newfirst,p_newfirst+p_repl_lines-1);
|
|
p_line[filldst] = savestr(buf);
|
|
if (out_of_mem) {
|
|
p_end = 0;
|
|
return FALSE;
|
|
}
|
|
p_Char[filldst++] = '=';
|
|
p_context = 100;
|
|
context = 0;
|
|
p_hunk_beg = p_input_line + 1;
|
|
while (fillsrc <= p_ptrn_lines || filldst <= p_end) {
|
|
line_beginning = ftell(pfp);
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch) {
|
|
if (p_max - filldst < 3)
|
|
Strcpy(buf, " \n"); /* assume blank lines got chopped */
|
|
else {
|
|
fatal1("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 (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
return FALSE;
|
|
}
|
|
switch (ch) {
|
|
case '-':
|
|
if (fillsrc > p_ptrn_lines) {
|
|
free(s);
|
|
p_end = filldst-1;
|
|
malformed ();
|
|
}
|
|
p_Char[fillsrc] = ch;
|
|
p_line[fillsrc] = s;
|
|
p_len[fillsrc++] = strlen(s);
|
|
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++;
|
|
p_Char[fillsrc] = ch;
|
|
p_line[fillsrc] = s;
|
|
p_len[fillsrc++] = strlen(s);
|
|
s = savestr(s);
|
|
if (out_of_mem) {
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
return FALSE;
|
|
}
|
|
/* FALL THROUGH */
|
|
case '+':
|
|
if (filldst > p_end) {
|
|
free(s);
|
|
while (--filldst > p_ptrn_lines)
|
|
free(p_line[filldst]);
|
|
p_end = fillsrc-1;
|
|
malformed ();
|
|
}
|
|
p_Char[filldst] = ch;
|
|
p_line[filldst] = s;
|
|
p_len[filldst++] = strlen(s);
|
|
break;
|
|
default:
|
|
p_end = filldst;
|
|
malformed ();
|
|
}
|
|
if (ch != ' ' && context > 0) {
|
|
if (context < p_context)
|
|
p_context = context;
|
|
context = -1000;
|
|
}
|
|
}/* while */
|
|
}
|
|
else { /* normal diff--fake it up */
|
|
char hunk_type;
|
|
Reg3 int i;
|
|
LINENUM min, max;
|
|
long line_beginning = ftell(pfp);
|
|
|
|
p_context = 0;
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch || !isdigit(*buf)) {
|
|
next_intuit_at(line_beginning,p_input_line);
|
|
return FALSE;
|
|
}
|
|
p_first = (LINENUM)atol(buf);
|
|
for (s=buf; isdigit(*s); s++) ;
|
|
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);
|
|
for (; 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;
|
|
if (p_end > MAXHUNKSIZE)
|
|
fatal4("hunk too large (%ld lines) at line %ld: %s",
|
|
p_end, p_input_line, buf);
|
|
while (p_end >= hunkmax)
|
|
grow_hunkmax();
|
|
p_newfirst = min;
|
|
p_repl_lines = max - min + 1;
|
|
Sprintf(buf, "*** %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++) {
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch)
|
|
fatal2("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '<')
|
|
fatal2("< 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 (hunk_type == 'c') {
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch)
|
|
fatal2("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '-')
|
|
fatal2("--- expected at line %ld of patch\n", p_input_line);
|
|
}
|
|
Sprintf(buf, "--- %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++) {
|
|
ret = pgets(buf, sizeof buf, pfp);
|
|
p_input_line++;
|
|
if (ret == Nullch)
|
|
fatal2("unexpected end of file in patch at line %ld\n",
|
|
p_input_line);
|
|
if (*buf != '>')
|
|
fatal2("> 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 (reverse) /* backwards patch? */
|
|
if (!pch_swap())
|
|
say1("Not enough memory to swap next hunk!\n");
|
|
#ifdef DEBUGGING
|
|
if (debug & 2) {
|
|
int i;
|
|
char special;
|
|
|
|
for (i=0; i <= p_end; i++) {
|
|
if (i == p_ptrn_lines)
|
|
special = '^';
|
|
else
|
|
special = ' ';
|
|
fprintf(stderr, "%3d %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, worrying about indentation. */
|
|
|
|
char *
|
|
pgets(bf,sz,fp)
|
|
char *bf;
|
|
int sz;
|
|
FILE *fp;
|
|
{
|
|
char *ret = fgets(bf, sz, fp);
|
|
Reg1 char *s;
|
|
Reg2 int indent = 0;
|
|
|
|
if (p_indent && ret != Nullch) {
|
|
for (s=buf;
|
|
indent < p_indent && (*s == ' ' || *s == '\t' || *s == 'X'); s++) {
|
|
if (*s == '\t')
|
|
indent += 8 - (indent % 7);
|
|
else
|
|
indent++;
|
|
}
|
|
if (buf != s)
|
|
Strcpy(buf, s);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Reverse the old and new portions of the current hunk. */
|
|
|
|
bool
|
|
pch_swap()
|
|
{
|
|
char **tp_line; /* the text of the hunk */
|
|
short *tp_len; /* length of each line */
|
|
char *tp_char; /* +, -, and ! */
|
|
Reg1 LINENUM i;
|
|
Reg2 LINENUM n;
|
|
bool blankline = FALSE;
|
|
Reg3 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(char**); /* force set_hunkmax to allocate again */
|
|
p_len = Null(short*);
|
|
p_Char = Nullch;
|
|
set_hunkmax();
|
|
if (p_line == Null(char**) || p_len == Null(short*) || p_Char == Nullch) {
|
|
#ifndef lint
|
|
if (p_line == Null(char**))
|
|
free((char*)p_line);
|
|
p_line = tp_line;
|
|
if (p_len == Null(short*))
|
|
free((char*)p_len);
|
|
p_len = tp_len;
|
|
#endif
|
|
if (p_Char == Nullch)
|
|
free((char*)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;
|
|
#ifndef lint
|
|
if (tp_line == Null(char**))
|
|
free((char*)tp_line);
|
|
if (tp_len == Null(short*))
|
|
free((char*)tp_len);
|
|
#endif
|
|
if (tp_char == Nullch)
|
|
free((char*)tp_char);
|
|
return TRUE;
|
|
}
|
|
|
|
/* 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_context()
|
|
{
|
|
return p_context;
|
|
}
|
|
|
|
/* Return the length of a particular patch line. */
|
|
|
|
short
|
|
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];
|
|
}
|
|
|
|
/* 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()
|
|
{
|
|
Reg1 char *t;
|
|
Reg2 long beginning_of_this_line;
|
|
Reg3 bool this_line_is_command = FALSE;
|
|
Reg4 FILE *pipefp;
|
|
|
|
if (!skip_rest_of_patch) {
|
|
Unlink(TMPOUTNAME);
|
|
copy_file(filearg[0], TMPOUTNAME);
|
|
if (verbose)
|
|
Sprintf(buf, "/bin/ed %s", TMPOUTNAME);
|
|
else
|
|
Sprintf(buf, "/bin/ed - %s", TMPOUTNAME);
|
|
pipefp = popen(buf, "w");
|
|
}
|
|
for (;;) {
|
|
beginning_of_this_line = ftell(pfp);
|
|
if (pgets(buf, sizeof buf, pfp) == Nullch) {
|
|
next_intuit_at(beginning_of_this_line,p_input_line);
|
|
break;
|
|
}
|
|
p_input_line++;
|
|
for (t=buf; isdigit(*t) || *t == ','; t++) ;
|
|
this_line_is_command = (isdigit(*buf) &&
|
|
(*t == 'd' || *t == 'c' || *t == 'a') );
|
|
if (this_line_is_command) {
|
|
if (!skip_rest_of_patch)
|
|
fputs(buf, pipefp);
|
|
if (*t != 'd') {
|
|
while (pgets(buf, sizeof buf, pfp) != Nullch) {
|
|
p_input_line++;
|
|
if (!skip_rest_of_patch)
|
|
fputs(buf, pipefp);
|
|
if (strEQ(buf, ".\n"))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
next_intuit_at(beginning_of_this_line,p_input_line);
|
|
break;
|
|
}
|
|
}
|
|
if (skip_rest_of_patch)
|
|
return;
|
|
fprintf(pipefp, "w\n");
|
|
fprintf(pipefp, "q\n");
|
|
Fflush(pipefp);
|
|
Pclose(pipefp);
|
|
ignore_signals();
|
|
if (move_file(TMPOUTNAME, outname) < 0) {
|
|
toutkeep = TRUE;
|
|
chmod(TMPOUTNAME, filemode);
|
|
}
|
|
else
|
|
chmod(outname, filemode);
|
|
set_signals(1);
|
|
}
|