The branch main has been updated by bapt: URL: https://cgit.FreeBSD.org/src/commit/?id=8d442cf32e4fb29fbb85090ac29d32d1e30fd824
commit 8d442cf32e4fb29fbb85090ac29d32d1e30fd824 Author: Baptiste Daroussin <[email protected]> AuthorDate: 2026-02-13 08:33:17 +0000 Commit: Baptiste Daroussin <[email protected]> CommitDate: 2026-02-13 09:34:15 +0000 diff3: fix diff3 -A for cases where file2 differs but file1 and file3 agrees, the code stored the file2 and file3 line numbers in the de[] editing script entries but used them as if they were file1 line numbers. Reviewed by: thj Differential Revision: https://reviews.freebsd.org/D55276 --- usr.bin/diff3/diff3.c | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) diff --git a/usr.bin/diff3/diff3.c b/usr.bin/diff3/diff3.c index d010a0b1d067..4f3239b10625 100644 --- a/usr.bin/diff3/diff3.c +++ b/usr.bin/diff3/diff3.c @@ -118,6 +118,7 @@ static struct diff *d23; */ static struct diff *de; static char *overlap; +static int *de_delta; /* file1-file3 line number delta per edit */ static int overlapcnt; static FILE *fp[3]; static int cline[3]; /* # of the last-read line in each file (0-2) */ @@ -365,6 +366,7 @@ merge(int m1, int m2) d1 = d13; d2 = d23; j = 0; + int f1f3delta = 0; for (;;) { t1 = (d1 < d13 + m1); @@ -383,6 +385,8 @@ merge(int m1, int m2) } else if (eflag == EFLAG_OVERLAP) { j = edit(d2, dup, j, DIFF_TYPE1); } + f1f3delta += (d1->old.to - d1->old.from) - + (d1->new.to - d1->new.from); d1++; continue; } @@ -394,9 +398,10 @@ merge(int m1, int m2) change(3, &d2->new, false); change(2, &d2->old, false); } else if (Aflag || mflag) { - // XXX-THJ: What does it mean for the second file to differ? - if (eflag == EFLAG_UNMERGED) + if (eflag == EFLAG_UNMERGED) { j = edit(d2, dup, j, DIFF_TYPE2); + de_delta[j] = f1f3delta; + } } d2++; continue; @@ -436,6 +441,8 @@ merge(int m1, int m2) j = edit(d1, dup, j, DIFF_TYPE3); } dup = false; + f1f3delta += (d1->old.to - d1->old.from) - + (d1->new.to - d1->new.from); d1++; d2++; continue; @@ -723,7 +730,7 @@ Ascript(int n) prange(old, deletenew); printrange(fp[2], new); } else { - startmark = new->to - 1; + startmark = new->to - 1 + de_delta[n]; printf("%da\n", startmark); printf("%s %s\n", newmark, f3mark); @@ -811,7 +818,9 @@ mergescript(int i) else if (de[n].type == DIFF_TYPE3 && (old->from == old->to)) { r.from = old->from - 1; r.to = new->from; - } else + } else if (de[n].type == DIFF_TYPE2) + r.to = new->from + de_delta[n]; + else r.to = old->from; printrange(fp[0], &r); @@ -859,7 +868,9 @@ mergescript(int i) exit(EXIT_FAILURE); } - if (old->from == old->to) + if (de[n].type == DIFF_TYPE2) + r.from = new->to + de_delta[n]; + else if (old->from == old->to) r.from = new->to; else r.from = old->to; @@ -870,7 +881,7 @@ mergescript(int i) * additions to this file should have been handled by now. * * If the ranges are the same we need to rewind a line. - * If the new range is 0 length (from == to), we need to use the old + * If the new range is 0 length (from == to), we need to use the new * range. */ new = &de[n-1].new; @@ -879,7 +890,7 @@ mergescript(int i) if (old->from == new->from && old->to == new->to) r.from--; else if (new->from == new->to) - r.from = old->from; + r.from = new->from; r.to = INT_MAX; printrange(fp[2], &r); @@ -891,6 +902,7 @@ increase(void) { struct diff *p; char *q; + int *s; size_t newsz, incr; /* are the memset(3) calls needed? */ @@ -917,6 +929,11 @@ increase(void) err(1, NULL); memset(q + szchanges, 0, incr * 1); overlap = q; + s = reallocarray(de_delta, newsz, sizeof(*s)); + if (s == NULL) + err(1, NULL); + memset(s + szchanges, 0, incr * sizeof(*s)); + de_delta = s; szchanges = newsz; }
