From: Ezekiel Newren via GitGitGadget Date: Mon, 30 Mar 2026 17:00:01 GMT Subject: [PATCH v4 4/6] xdiff/xdl_cleanup_records: make limits more clear Message-ID: <75fe3ea1250ab7dfa4e029f49f2ad353185afded.1774890003.git.gitgitgadget@gmail.com> In-Reply-To: From: Ezekiel Newren Make the handling of per-file limits and the minimal-case clearer. * Use explicit per-file limit variables (mlim1, mlim2) and initialize them. * The additional condition `!need_min` is redudant now, remove it. Best viewed with --color-words. Signed-off-by: Ezekiel Newren --- xdiff/xprepare.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/xdiff/xprepare.c b/xdiff/xprepare.c index 386668a92d..bd8baf214d 100644 --- a/xdiff/xprepare.c +++ b/xdiff/xprepare.c @@ -268,7 +268,7 @@ static bool xdl_clean_mmatch(uint8_t const *action, ptrdiff_t i, ptrdiff_t s, pt * might be potentially discarded if they appear in a run of discardable. */ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) { - ptrdiff_t i, nm, mlim; + ptrdiff_t i, nm, mlim1, mlim2; xdlclass_t *rcrec; uint8_t *action1 = NULL, *action2 = NULL; bool need_min = !!(cf->flags & XDF_NEED_MINIMAL); @@ -287,25 +287,30 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd goto cleanup; } + if (need_min) { + /* i.e. infinity */ + mlim1 = PTRDIFF_MAX; + mlim2 = PTRDIFF_MAX; + } else { + mlim1 = XDL_MIN(xdl_bogosqrt(xdf1->nrec), XDL_MAX_EQLIMIT); + mlim2 = XDL_MIN(xdl_bogosqrt(xdf2->nrec), XDL_MAX_EQLIMIT); + } + /* * Initialize temporary arrays with DISCARD, KEEP, or INVESTIGATE. */ - if ((mlim = (long)xdl_bogosqrt((uint64_t)xdf1->nrec)) > XDL_MAX_EQLIMIT) - mlim = XDL_MAX_EQLIMIT; for (i = xdf1->dstart; i <= xdf1->dend; i++) { size_t mph1 = xdf1->recs[i].minimal_perfect_hash; rcrec = cf->rcrecs[mph1]; nm = rcrec ? rcrec->len2 : 0; - action1[i] = (nm == 0) ? DISCARD: (nm >= mlim && !need_min) ? INVESTIGATE: KEEP; + action1[i] = (nm == 0) ? DISCARD: nm >= mlim1 ? INVESTIGATE: KEEP; } - if ((mlim = (long)xdl_bogosqrt((uint64_t)xdf2->nrec)) > XDL_MAX_EQLIMIT) - mlim = XDL_MAX_EQLIMIT; for (i = xdf2->dstart; i <= xdf2->dend; i++) { size_t mph2 = xdf2->recs[i].minimal_perfect_hash; rcrec = cf->rcrecs[mph2]; nm = rcrec ? rcrec->len1 : 0; - action2[i] = (nm == 0) ? DISCARD: (nm >= mlim && !need_min) ? INVESTIGATE: KEEP; + action2[i] = (nm == 0) ? DISCARD: nm >= mlim2 ? INVESTIGATE: KEEP; } /* -- gitgitgadget