Refactor the require failure message generation to use 1 less temporary

SV, and to build as much text as possible with newSVpvf

p4raw-id: //depot/perl@26500

diff --git a/pp_ctl.c b/pp_ctl.c
index ad901cc..12f3f04 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -3340,23 +3340,22 @@ PP(pp_require)
                msgstr = SvPV_nolen_const(msg);
            } else {
                if (namesv) {                   /* did we lookup @INC? */
-                   SV * const msg = sv_2mortal(newSVpv(msgstr,0));
-                   SV * const dirmsgsv = NEWSV(0, 0);
                    AV * const ar = GvAVn(PL_incgv);
                    I32 i;
-                   sv_catpvn(msg, " in @INC", 8);
-                   if (instr(SvPVX_const(msg), ".h "))
-                       sv_catpv(msg, " (change .h to .ph maybe?)");
-                   if (instr(SvPVX_const(msg), ".ph "))
-                       sv_catpv(msg, " (did you run h2ph?)");
-                   sv_catpv(msg, " (@INC contains:");
+                   SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_ 
+                       "%s in @INC%s%s (@INC contains:",
+                       msgstr,
+                       (instr(msgstr, ".h ")
+                        ? " (change .h to .ph maybe?)" : ""),
+                       (instr(msgstr, ".ph ")
+                        ? " (did you run h2ph?)" : "")
+                                                             ));
+                   
                    for (i = 0; i <= AvFILL(ar); i++) {
-                       const char *dir = SvPVx_nolen_const(*av_fetch(ar, i, TRUE));
-                       Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
-                       sv_catsv(msg, dirmsgsv);
+                       sv_catpvn(msg, " ", 1);
+                       sv_catsv(msg, *av_fetch(ar, i, TRUE));
                    }
                    sv_catpvn(msg, ")", 1);
-                   SvREFCNT_dec(dirmsgsv);
                    msgstr = SvPV_nolen_const(msg);
                }    
            }