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perldelta: Rmv entry that applies just to a devel release
[perl5.git] / utf8.c
diff --git a/utf8.c b/utf8.c
index c523f32..4949bf6 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -754,11 +754,15 @@ Perl__is_utf8_char_helper(const U8 * const s, const U8 * e, const U32 flags)
     return UTF8SKIP(s);
 }
 
-STATIC char *
-S__byte_dump_string(pTHX_ const U8 * s, const STRLEN len)
+char *
+Perl__byte_dump_string(pTHX_ const U8 * s, const STRLEN len, const bool format)
 {
     /* Returns a mortalized C string that is a displayable copy of the 'len'
-     * bytes starting at 's', each in a \xXY format. */
+     * bytes starting at 's'.  'format' gives how to display each byte.
+     * Currently, there are only two formats, so it is currently a bool:
+     *      0   \xab
+     *      1    ab         (that is a space between two hex digit bytes)
+     */
 
     const STRLEN output_len = 4 * len + 1;  /* 4 bytes per each input, plus a
                                                trailing NUL */
@@ -776,8 +780,13 @@ S__byte_dump_string(pTHX_ const U8 * s, const STRLEN len)
         const unsigned high_nibble = (*s & 0xF0) >> 4;
         const unsigned low_nibble =  (*s & 0x0F);
 
-        *d++ = '\\';
-        *d++ = 'x';
+        if (format) {
+            *d++ = ' ';
+        }
+        else {
+            *d++ = '\\';
+            *d++ = 'x';
+        }
 
         if (high_nibble < 10) {
             *d++ = high_nibble + '0';
@@ -827,7 +836,7 @@ S_unexpected_non_continuation_text(pTHX_ const U8 * const s,
     return Perl_form(aTHX_ "%s: %s (unexpected non-continuation byte 0x%02x,"
                            " %s after start byte 0x%02x; need %d bytes, got %d)",
                            malformed_text,
-                           _byte_dump_string(s, print_len),
+                           _byte_dump_string(s, print_len, 0),
                            *(s + non_cont_byte_pos),
                            where,
                            *s,
@@ -1070,6 +1079,8 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
     U8 * adjusted_s0 = (U8 *) s0;
     U8 * adjusted_send = NULL;  /* (Initialized to silence compilers' wrong
                                    warning) */
+    U8 temp_char_buf[UTF8_MAXBYTES + 1]; /* Used to avoid a Newx in this
+                                            routine; see [perl #130921] */
     UV uv_so_far = 0;   /* (Initialized to silence compilers' wrong warning) */
 
     PERL_ARGS_ASSERT_UTF8N_TO_UVCHR_ERROR;
@@ -1179,14 +1190,6 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
     /* Save how many bytes were actually in the character */
     curlen = s - s0;
 
-    /* A convenience macro that matches either of the too-short conditions.  */
-#   define UTF8_GOT_TOO_SHORT (UTF8_GOT_SHORT|UTF8_GOT_NON_CONTINUATION)
-
-    if (UNLIKELY(possible_problems & UTF8_GOT_TOO_SHORT)) {
-        uv_so_far = uv;
-        uv = UNICODE_REPLACEMENT;
-    }
-
     /* Note that there are two types of too-short malformation.  One is when
      * there is actual wrong data before the normal termination of the
      * sequence.  The other is that the sequence wasn't complete before the end
@@ -1194,7 +1197,15 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
      * This means that we were passed data for a partial character, but it is
      * valid as far as we saw.  The other is definitely invalid.  This
      * distinction could be important to a caller, so the two types are kept
-     * separate. */
+     * separate.
+     *
+     * A convenience macro that matches either of the too-short conditions.  */
+#   define UTF8_GOT_TOO_SHORT (UTF8_GOT_SHORT|UTF8_GOT_NON_CONTINUATION)
+
+    if (UNLIKELY(possible_problems & UTF8_GOT_TOO_SHORT)) {
+        uv_so_far = uv;
+        uv = UNICODE_REPLACEMENT;
+    }
 
     /* Check for overflow */
     if (UNLIKELY(does_utf8_overflow(s0, send))) {
@@ -1236,10 +1247,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                      I8_TO_NATIVE_UTF8(UTF_CONTINUATION_MARK));
             }
 
-            Newx(adjusted_s0, OFFUNISKIP(min_uv) + 1, U8);
-            SAVEFREEPV((U8 *) adjusted_s0);    /* Needed because we may not get
-                                                  to free it ourselves if
-                                                  warnings are made fatal */
+            adjusted_s0 = temp_char_buf;
             adjusted_send = uvoffuni_to_utf8_flags(adjusted_s0, min_uv, 0);
         }
     }
@@ -1401,7 +1409,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                         if (pack_warn) {
                             message = Perl_form(aTHX_ "%s: %s (overflows)",
                                             malformed_text,
-                                            _byte_dump_string(s0, send - s0));
+                                            _byte_dump_string(s0, send - s0, 0));
                         }
                     }
                 }
@@ -1437,7 +1445,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                 "%s: %s (unexpected continuation byte 0x%02x,"
                                 " with no preceding start byte)",
                                 malformed_text,
-                                _byte_dump_string(s0, 1), *s0);
+                                _byte_dump_string(s0, 1, 0), *s0);
                     }
                 }
             }
@@ -1452,7 +1460,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                         message = Perl_form(aTHX_
                                 "%s: %s (too short; %d byte%s available, need %d)",
                                 malformed_text,
-                                _byte_dump_string(s0, send - s0),
+                                _byte_dump_string(s0, send - s0, 0),
                                 (int)avail_len,
                                 avail_len == 1 ? "" : "s",
                                 (int)expectlen);
@@ -1516,8 +1524,8 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                     " should be represented with a"
                                     " different, shorter sequence)",
                                     malformed_text,
-                                    _byte_dump_string(s0, send - s0),
-                                    _byte_dump_string(s0, curlen));
+                                    _byte_dump_string(s0, send - s0, 0),
+                                    _byte_dump_string(s0, curlen, 0));
                         }
                         else {
                             U8 tmpbuf[UTF8_MAXBYTES+1];
@@ -1527,8 +1535,8 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                 "%s: %s (overlong; instead use %s to represent"
                                 " U+%0*" UVXf ")",
                                 malformed_text,
-                                _byte_dump_string(s0, send - s0),
-                                _byte_dump_string(tmpbuf, e - tmpbuf),
+                                _byte_dump_string(s0, send - s0, 0),
+                                _byte_dump_string(tmpbuf, e - tmpbuf, 0),
                                 ((uv < 256) ? 2 : 4), /* Field width of 2 for
                                                          small code points */
                                 uv);
@@ -1553,7 +1561,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                             message = Perl_form(aTHX_
                                     "UTF-16 surrogate (any UTF-8 sequence that"
                                     " starts with \"%s\" is for a surrogate)",
-                                    _byte_dump_string(s0, curlen));
+                                    _byte_dump_string(s0, curlen, 0));
                         }
                         else {
                             message = Perl_form(aTHX_
@@ -1583,7 +1591,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                     "Any UTF-8 sequence that starts with"
                                     " \"%s\" is for a non-Unicode code point,"
                                     " may not be portable",
-                                    _byte_dump_string(s0, curlen));
+                                    _byte_dump_string(s0, curlen, 0));
                         }
                         else {
                             message = Perl_form(aTHX_
@@ -1622,7 +1630,7 @@ Perl_utf8n_to_uvchr_error(pTHX_ const U8 *s,
                                         "Any UTF-8 sequence that starts with"
                                         " \"%s\" is for a non-Unicode code"
                                         " point, and is not portable",
-                                        _byte_dump_string(s0, curlen));
+                                        _byte_dump_string(s0, curlen, 0));
                         }
                         else {
                             message = Perl_form(aTHX_
@@ -4543,12 +4551,12 @@ Perl__swash_inversion_hash(pTHX_ SV* const swash)
        while ((from_list = (AV *) hv_iternextsv(specials_inverse,
                                                 &char_to, &to_len)))
        {
-           if (av_tindex_nomg(from_list) > 0) {
+           if (av_tindex_skip_len_mg(from_list) > 0) {
                SSize_t i;
 
                /* We iterate over all combinations of i,j to place each code
                 * point on each list */
-               for (i = 0; i <= av_tindex_nomg(from_list); i++) {
+               for (i = 0; i <= av_tindex_skip_len_mg(from_list); i++) {
                    SSize_t j;
                    AV* i_list = newAV();
                    SV** entryp = av_fetch(from_list, i, FALSE);
@@ -4565,7 +4573,7 @@ Perl__swash_inversion_hash(pTHX_ SV* const swash)
                    }
 
                    /* For DEBUG_U: UV u = valid_utf8_to_uvchr((U8*) SvPVX(*entryp), 0);*/
-                   for (j = 0; j <= av_tindex_nomg(from_list); j++) {
+                   for (j = 0; j <= av_tindex_skip_len_mg(from_list); j++) {
                        entryp = av_fetch(from_list, j, FALSE);
                        if (entryp == NULL) {
                            Perl_croak(aTHX_ "panic: av_fetch() unexpectedly failed");
@@ -4641,7 +4649,7 @@ Perl__swash_inversion_hash(pTHX_ SV* const swash)
 
            /* Look through list to see if this inverse mapping already is
             * listed, or if there is a mapping to itself already */
-           for (i = 0; i <= av_tindex_nomg(list); i++) {
+           for (i = 0; i <= av_tindex_skip_len_mg(list); i++) {
                SV** entryp = av_fetch(list, i, FALSE);
                SV* entry;
                UV uv;