Perl_sv_vcatpvfn_flags: eliminate VECTORIZE_ARGS

[perl5.git] / pp_pack.c

diff --git a/pp_pack.c b/pp_pack.c
index a3055ed..86d138b 100644 (file)
--- a/pp_pack.c
+++ b/pp_pack.c
@@ -251,12 +251,15 @@ STATIC U8
 utf8_to_byte(pTHX_ const char **s, const char *end, I32 datumtype)
 {
     STRLEN retlen;
-    UV val = utf8n_to_uvchr((U8 *) *s, end-*s, &retlen,
+    UV val;
+
+    if (*s >= end) {
+       goto croak;
+    }
+    val = utf8n_to_uvchr((U8 *) *s, end-*s, &retlen,
                         ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
-    /* We try to process malformed UTF-8 as much as possible (preferably with
-       warnings), but these two mean we make no progress in the string and
-       might enter an infinite loop */
-    if (retlen == (STRLEN) -1 || retlen == 0)
+    if (retlen == (STRLEN) -1)
+      croak:
        Perl_croak(aTHX_ "Malformed UTF-8 string in '%c' format in unpack",
                   (int) TYPE_NO_MODIFIERS(datumtype));
     if (val >= 0x100) {
@@ -290,7 +293,7 @@ S_utf8_to_bytes(pTHX_ const char **s, const char *end, const char *buf, int buf_
     for (;buf_len > 0; buf_len--) {
        if (from >= end) return FALSE;
        val = utf8n_to_uvchr((U8 *) from, end-from, &retlen, flags);
-       if (retlen == (STRLEN) -1 || retlen == 0) {
+       if (retlen == (STRLEN) -1) {
            from += UTF8SKIP(from);
            bad |= 1;
        } else from += retlen;
@@ -396,7 +399,7 @@ STMT_START {                                                        \
     STRLEN retlen;                                             \
     if (str >= end) break;                                     \
     val = utf8n_to_uvchr((U8 *) str, end-str, &retlen, utf8_flags);    \
-    if (retlen == (STRLEN) -1 || retlen == 0) {                        \
+    if (retlen == (STRLEN) -1) {                               \
        *cur = '\0';                                            \
        Perl_croak(aTHX_ "Malformed UTF-8 string in pack");     \
     }                                                          \
@@ -1225,7 +1228,7 @@ S_unpack_rec(pTHX_ tempsym_t* symptr, const char *s, const char *strbeg, const c
                    STRLEN retlen;
                    aint = utf8n_to_uvchr((U8 *) s, strend-s, &retlen,
                                 ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
-                   if (retlen == (STRLEN) -1 || retlen == 0)
+                   if (retlen == (STRLEN) -1)
                        Perl_croak(aTHX_ "Malformed UTF-8 string in unpack");
                    s += retlen;
                  }
@@ -1248,7 +1251,7 @@ S_unpack_rec(pTHX_ tempsym_t* symptr, const char *s, const char *strbeg, const c
                    STRLEN retlen;
                    const UV val = utf8n_to_uvchr((U8 *) s, strend-s, &retlen,
                                         ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
-                   if (retlen == (STRLEN) -1 || retlen == 0)
+                   if (retlen == (STRLEN) -1)
                        Perl_croak(aTHX_ "Malformed UTF-8 string in unpack");
                    s += retlen;
                    if (!checksum)
@@ -1310,7 +1313,7 @@ S_unpack_rec(pTHX_ tempsym_t* symptr, const char *s, const char *strbeg, const c
                                                        strend - s,
                                                        &retlen,
                                                        UTF8_ALLOW_DEFAULT));
-                   if (retlen == (STRLEN) -1 || retlen == 0)
+                   if (retlen == (STRLEN) -1)
                        Perl_croak(aTHX_ "Malformed UTF-8 string in unpack");
                    s += retlen;
                }