diff options
Diffstat (limited to 'xdiff/xemit.c')
| -rw-r--r-- | xdiff/xemit.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 75f0fe4986..1d40c9cb40 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -43,6 +43,10 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t * return 0; } +static long saturating_add(long a, long b) +{ + return signed_add_overflows(a, b) ? LONG_MAX : a + b; +} /* * Starting at the passed change atom, find the latest change atom to be included @@ -52,9 +56,11 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t * xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg) { xdchange_t *xch, *xchp, *lxch; - long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen; + long max_common = saturating_add(saturating_add(xecfg->ctxlen, + xecfg->ctxlen), + xecfg->interhunkctxlen); long max_ignorable = xecfg->ctxlen; - unsigned long ignored = 0; /* number of ignored blank lines */ + long ignored = 0; /* number of ignored blank lines */ /* remove ignorable changes that are too far before other changes */ for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) { |