diff options
| -rw-r--r-- | combine-diff.c | 65 |
1 files changed, 38 insertions, 27 deletions
diff --git a/combine-diff.c b/combine-diff.c index eb0d757..e519583 100644 --- a/combine-diff.c +++ b/combine-diff.c @@ -243,7 +243,7 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file, * started by showing sline[lno] (possibly showing the lost * lines attached to it first). */ - for (lno = 0, p_lno = 1; lno < cnt; lno++) { + for (lno = 0, p_lno = 1; lno <= cnt; lno++) { struct lline *ll; sline[lno].p_lno[n] = p_lno; @@ -254,7 +254,7 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file, p_lno++; /* '-' means parent had it */ ll = ll->next; } - if (!(sline[lno].flag & nmask)) + if (lno < cnt && !(sline[lno].flag & nmask)) p_lno++; /* no '+' means parent had it */ } sline[lno].p_lno[n] = p_lno; /* trailer */ @@ -301,14 +301,14 @@ static unsigned long find_next(struct sline *sline, * lines that are not interesting to interesting() function * that are surrounded by interesting() ones. */ - while (i < cnt) + while (i <= cnt) if (uninteresting ? !(sline[i].flag & mark) : (sline[i].flag & mark)) return i; else i++; - return cnt; + return i; } static int give_context(struct sline *sline, unsigned long cnt, int num_parent) @@ -327,10 +327,10 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent) * lines but they are treated as "interesting" in the end. */ i = find_next(sline, mark, 0, cnt, 0); - if (cnt <= i) + if (cnt < i) return 0; - while (i < cnt) { + while (i <= cnt) { unsigned long j = (context < i) ? (i - context) : 0; unsigned long k; @@ -343,7 +343,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent) * next uninteresting one start? */ j = find_next(sline, mark, i, cnt, 1); - if (cnt <= j) + if (cnt < j) break; /* the rest are all interesting */ /* lookahead context lines */ @@ -365,7 +365,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent) * the trailing edge a bit. */ i = k; - k = (j + context < cnt) ? j + context : cnt; + k = (j + context < cnt+1) ? j + context : cnt+1; while (j < k) sline[j++].flag |= mark; } @@ -380,7 +380,7 @@ static int make_hunks(struct sline *sline, unsigned long cnt, unsigned long i; int has_interesting = 0; - for (i = 0; i < cnt; i++) { + for (i = 0; i <= cnt; i++) { if (interesting(&sline[i], all_mask)) sline[i].flag |= mark; else @@ -394,15 +394,15 @@ static int make_hunks(struct sline *sline, unsigned long cnt, * parent, mark that uninteresting. */ i = 0; - while (i < cnt) { + while (i <= cnt) { unsigned long j, hunk_begin, hunk_end; unsigned long same_diff; - while (i < cnt && !(sline[i].flag & mark)) + while (i <= cnt && !(sline[i].flag & mark)) i++; - if (cnt <= i) + if (cnt < i) break; /* No more interesting hunks */ hunk_begin = i; - for (j = i + 1; j < cnt; j++) { + for (j = i + 1; j <= cnt; j++) { if (!(sline[j].flag & mark)) { /* Look beyond the end to see if there * is an interesting line after this @@ -412,8 +412,8 @@ static int make_hunks(struct sline *sline, unsigned long cnt, int contin = 0; la = adjust_hunk_tail(sline, all_mask, hunk_begin, j); - la = (la + context < cnt) ? - (la + context) : cnt; + la = (la + context < cnt + 1) ? + (la + context) : cnt + 1; while (j <= --la) { if (sline[la].flag & mark) { contin = 1; @@ -506,18 +506,24 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent) while (1) { struct sline *sl = &sline[lno]; - int hunk_end; - while (lno < cnt && !(sline[lno].flag & mark)) + unsigned long hunk_end; + unsigned long rlines; + while (lno <= cnt && !(sline[lno].flag & mark)) lno++; - if (cnt <= lno) + if (cnt < lno) break; - for (hunk_end = lno + 1; hunk_end < cnt; hunk_end++) - if (!(sline[hunk_end].flag & mark)) - break; + else { + for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++) + if (!(sline[hunk_end].flag & mark)) + break; + } + rlines = hunk_end - lno; + if (cnt < hunk_end) + rlines--; /* pointing at the last delete hunk */ for (i = 0; i <= num_parent; i++) putchar(combine_marker); for (i = 0; i < num_parent; i++) show_parent_lno(sline, lno, hunk_end, cnt, i); - printf(" +%lu,%lu ", lno+1, hunk_end-lno); + printf(" +%lu,%lu ", lno+1, rlines); for (i = 0; i <= num_parent; i++) putchar(combine_marker); putchar('\n'); while (lno < hunk_end) { @@ -536,6 +542,8 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent) puts(ll->line); ll = ll->next; } + if (cnt < lno) + break; p_mask = 1; for (j = 0; j < num_parent; j++) { if (p_mask & sl->flag) @@ -560,7 +568,7 @@ static void reuse_combine_diff(struct sline *sline, unsigned long cnt, imask = (1UL<<i); jmask = (1UL<<j); - for (lno = 0; lno < cnt; lno++) { + for (lno = 0; lno <= cnt; lno++) { struct lline *ll = sline->lost_head; sline->p_lno[i] = sline->p_lno[j]; while (ll) { @@ -632,10 +640,10 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent, if (result_size && result[result_size-1] != '\n') cnt++; /* incomplete line */ - sline = xcalloc(cnt+1, sizeof(*sline)); + sline = xcalloc(cnt+2, sizeof(*sline)); ep = result; sline[0].bol = result; - for (lno = 0; lno <= cnt; lno++) { + for (lno = 0; lno <= cnt + 1; lno++) { sline[lno].lost_tail = &sline[lno].lost_head; sline[lno].flag = 0; } @@ -653,8 +661,11 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent, result_file.ptr = result; result_file.size = result_size; - sline[0].p_lno = xcalloc((cnt+1) * num_parent, sizeof(unsigned long)); - for (lno = 0; lno < cnt; lno++) + /* Even p_lno[cnt+1] is valid -- that is for the end line number + * for deletion hunk at the end. + */ + sline[0].p_lno = xcalloc((cnt+2) * num_parent, sizeof(unsigned long)); + for (lno = 0; lno <= cnt; lno++) sline[lno+1].p_lno = sline[lno].p_lno + num_parent; for (i = 0; i < num_parent; i++) { |