EPOC update from Olaf Flebbe.
[p5sagit/p5-mst-13.2.git] / utf8.c
diff --git a/utf8.c b/utf8.c
index 52768ad..f16cb66 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -57,7 +57,7 @@ Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
     if (ckWARN(WARN_UTF8)) {
         if (UNICODE_IS_SURROGATE(uv) &&
             !(flags & UNICODE_ALLOW_SURROGATE))
-             Perl_warner(aTHX_ WARN_UTF8, "UTF-16 surrogate 0x%04"UVxf, uv);
+             Perl_warner(aTHX_ packWARN(WARN_UTF8), "UTF-16 surrogate 0x%04"UVxf, uv);
         else if (
                  ((uv >= 0xFDD0 && uv <= 0xFDEF &&
                    !(flags & UNICODE_ALLOW_FDD0))
@@ -72,7 +72,7 @@ Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
                  ((uv <= PERL_UNICODE_MAX) ||
                   !(flags & UNICODE_ALLOW_SUPER))
                  )
-             Perl_warner(aTHX_ WARN_UTF8,
+             Perl_warner(aTHX_ packWARN(WARN_UTF8),
                         "Unicode character 0x%04"UVxf" is illegal", uv);
     }
     if (UNI_IS_INVARIANT(uv)) {
@@ -469,10 +469,10 @@ malformed:
            char *s = SvPVX(sv);
 
            if (PL_op)
-               Perl_warner(aTHX_ WARN_UTF8,
+               Perl_warner(aTHX_ packWARN(WARN_UTF8),
                            "%s in %s", s,  OP_DESC(PL_op));
            else
-               Perl_warner(aTHX_ WARN_UTF8, "%s", s);
+               Perl_warner(aTHX_ packWARN(WARN_UTF8), "%s", s);
        }
     }
 
@@ -841,7 +841,7 @@ bool
 Perl_is_uni_alnum(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_alnum(tmpbuf);
 }
 
@@ -849,7 +849,7 @@ bool
 Perl_is_uni_alnumc(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_alnumc(tmpbuf);
 }
 
@@ -857,7 +857,7 @@ bool
 Perl_is_uni_idfirst(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_idfirst(tmpbuf);
 }
 
@@ -865,7 +865,7 @@ bool
 Perl_is_uni_alpha(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_alpha(tmpbuf);
 }
 
@@ -873,7 +873,7 @@ bool
 Perl_is_uni_ascii(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_ascii(tmpbuf);
 }
 
@@ -881,7 +881,7 @@ bool
 Perl_is_uni_space(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_space(tmpbuf);
 }
 
@@ -889,7 +889,7 @@ bool
 Perl_is_uni_digit(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_digit(tmpbuf);
 }
 
@@ -897,7 +897,7 @@ bool
 Perl_is_uni_upper(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_upper(tmpbuf);
 }
 
@@ -905,7 +905,7 @@ bool
 Perl_is_uni_lower(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_lower(tmpbuf);
 }
 
@@ -913,7 +913,7 @@ bool
 Perl_is_uni_cntrl(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_cntrl(tmpbuf);
 }
 
@@ -921,7 +921,7 @@ bool
 Perl_is_uni_graph(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_graph(tmpbuf);
 }
 
@@ -929,7 +929,7 @@ bool
 Perl_is_uni_print(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_print(tmpbuf);
 }
 
@@ -937,7 +937,7 @@ bool
 Perl_is_uni_punct(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_punct(tmpbuf);
 }
 
@@ -945,40 +945,36 @@ bool
 Perl_is_uni_xdigit(pTHX_ UV c)
 {
     U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
+    uvchr_to_utf8(tmpbuf, c);
     return is_utf8_xdigit(tmpbuf);
 }
 
 UV
 Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp)
 {
-    U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
-    return to_utf8_upper(tmpbuf, p, lenp);
+    uvchr_to_utf8(p, c);
+    return to_utf8_upper(p, p, lenp);
 }
 
 UV
 Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp)
 {
-    U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
-    return to_utf8_title(tmpbuf, p, lenp);
+    uvchr_to_utf8(p, c);
+    return to_utf8_title(p, p, lenp);
 }
 
 UV
 Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp)
 {
-    U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
-    return to_utf8_lower(tmpbuf, p, lenp);
+    uvchr_to_utf8(p, c);
+    return to_utf8_lower(p, p, lenp);
 }
 
 UV
 Perl_to_uni_fold(pTHX_ UV c, U8* p, STRLEN *lenp)
 {
-    U8 tmpbuf[UTF8_MAXLEN_FOLD+1];
-    uvchr_to_utf8(tmpbuf, (UV)c);
-    return to_utf8_fold(tmpbuf, p, lenp);
+    uvchr_to_utf8(p, c);
+    return to_utf8_fold(p, p, lenp);
 }
 
 /* for now these all assume no locale info available for Unicode > 255 */
@@ -1270,107 +1266,109 @@ The "ustrp" is a pointer to the character buffer to put the
 conversion result to.  The "lenp" is a pointer to the length
 of the result.
 
-The "swash" is a pointer to the swash to use.
+The "swashp" is a pointer to the swash to use.
 
-The "normal" is a string like "ToLower" which means the swash
-$utf8::ToLower, which is stored in lib/unicore/To/Lower.pl,
-and loaded by SWASHGET, using lib/utf8_heavy.pl.
+Both the special and normal mappings are stored lib/unicore/To/Foo.pl,
+and loaded by SWASHGET, using lib/utf8_heavy.pl.  The special (usually,
+but not always, a multicharacter mapping), is tried first.
 
-The "special" is a string like "utf8::ToSpecLower", which means
-the hash %utf8::ToSpecLower, which is stored in the same file,
-lib/unicore/To/Lower.pl, and also loaded by SWASHGET.  The access
-to the hash is by Perl_to_utf8_case().
+The "special" is a string like "utf8::ToSpecLower", which means the
+hash %utf8::ToSpecLower.  The access to the hash is through
+Perl_to_utf8_case().
 
-=cut
- */
+The "normal" is a string like "ToLower" which means the swash
+%utf8::ToLower.
+
+=cut */
 
 UV
 Perl_to_utf8_case(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp, SV **swashp, char *normal, char *special)
 {
-    UV uv0, uv1, uv2;
+    UV uv0, uv1;
     U8 tmpbuf[UTF8_MAXLEN_FOLD+1];
-    STRLEN len;
+    STRLEN len = 0;
 
-    if (!*swashp)
-        *swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0);
     uv0 = utf8_to_uvchr(p, 0);
+    /* The NATIVE_TO_UNI() and UNI_TO_NATIVE() mappings
+     * are necessary in EBCDIC, they are redundant no-ops
+     * in ASCII-ish platforms, and hopefully optimized away. */
     uv1 = NATIVE_TO_UNI(uv0);
     uvuni_to_utf8(tmpbuf, uv1);
-    uv2 = swash_fetch(*swashp, tmpbuf, TRUE);
-    if (uv2) {
-        /* It was "normal" (single character mapping). */
-         uv2 = UNI_TO_NATIVE(uv2);
-         len = uvchr_to_utf8(ustrp, uv2) - ustrp;
-         if (lenp)
-              *lenp = len;
-
-         return uv2;
-    }
-    else {
+
+    if (!*swashp) /* load on-demand */
+         *swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0);
+
+    if (special) {
+         /* It might be "special" (sometimes, but not always,
+         * a multicharacter mapping) */
         HV *hv;
         SV *keysv;
         HE *he;
-
+        SV *val;
+       
         if ((hv    = get_hv(special, FALSE)) &&
             (keysv = sv_2mortal(Perl_newSVpvf(aTHX_ "%04"UVXf, uv1))) &&
-            (he    = hv_fetch_ent(hv, keysv, FALSE, 0))) {
-             SV *val = HeVAL(he);
-             char *s = SvPV(val, len);
+            (he    = hv_fetch_ent(hv, keysv, FALSE, 0)) &&
+            (val   = HeVAL(he))) {
+            char *s;
 
-             if (len > 1) {
-                  Copy(s, ustrp, len, U8);
+             s = SvPV(val, len);
+             if (len == 1)
+                  len = uvuni_to_utf8(ustrp, NATIVE_TO_UNI(*(U8*)s)) - ustrp;
+             else {
 #ifdef EBCDIC
-                  {
-                       /* If we have EBCDIC we need to remap the
-                        * characters coming in from the "special"
-                        * (usually, but not always multicharacter)
-                        * mapping, since any characters in the low 256
-                        * are in Unicode code points, not EBCDIC.
-                        * --jhi */
-                       U8 *d = tmpbuf;
-                       U8 *t, *tend;
+                  /* If we have EBCDIC we need to remap the characters
+                   * since any characters in the low 256 are Unicode
+                   * code points, not EBCDIC. */
+                  U8 *t = (U8*)s, *tend = t + len, *d;
+               
+                  d = tmpbuf;
+                  if (SvUTF8(val)) {
+                       STRLEN tlen = 0;
                        
-                       if (SvUTF8(val)) {
-                            STRLEN tlen = 0;
-
-                            for (t = ustrp, tend = t + len;
-                                 t < tend; t += tlen) {
-                                 UV c = utf8_to_uvchr(t, &tlen);
-                                 
-                                 if (tlen > 0)
-                                      d = uvchr_to_utf8(d, UNI_TO_NATIVE(c));
-                                 else
-                                      break;
+                       while (t < tend) {
+                            UV c = utf8_to_uvchr(t, &tlen);
+                            if (tlen > 0) {
+                                 d = uvchr_to_utf8(d, UNI_TO_NATIVE(c));
+                                 t += tlen;
                             }
-                       } else {
-                            for (t = ustrp, tend = t + len;
-                                 t < tend; t++)
-                                 d = uvchr_to_utf8(d, UNI_TO_NATIVE(*t));
+                            else
+                                 break;
+                       }
+                  }
+                  else {
+                       while (t < tend) {
+                            d = uvchr_to_utf8(d, UNI_TO_NATIVE(*t));
+                            t++;
                        }
-                       len = d - tmpbuf; 
-                       Copy(tmpbuf, ustrp, len, U8);
                   }
+                  len = d - tmpbuf;
+                  Copy(tmpbuf, ustrp, len, U8);
+#else
+                  Copy(s, ustrp, len, U8);
 #endif
              }
-             else {
-                  UV  c = UNI_TO_NATIVE(*(U8*)s);
-                  U8 *d = uvchr_to_utf8(ustrp, c);
-
-                  len = d - ustrp;
-             }
-             if (lenp)
-                  *lenp = len;
+        }
+    }
 
-             return utf8_to_uvchr(ustrp, 0);
+    if (!len && *swashp) {
+        UV uv2 = swash_fetch(*swashp, tmpbuf, TRUE);
+        
+        if (uv2) {
+             /* It was "normal" (a single character mapping). */
+             UV uv3 = UNI_TO_NATIVE(uv2);
+             
+             len = uvchr_to_utf8(ustrp, uv3) - ustrp;
         }
+    }
 
-        /* So it was not "special": just copy it. */
+    if (!len) /* Neither: just copy. */
         len = uvchr_to_utf8(ustrp, uv0) - ustrp;
-        if (lenp)
-             *lenp = len;
 
-        return uv0;
-    }
+    if (lenp)
+        *lenp = len;
+
+    return len ? utf8_to_uvchr(ustrp, 0) : 0;
 }
 
 /*
@@ -1753,7 +1751,7 @@ Perl_pv_uni_display(pTHX_ SV *dsv, U8 *spv, STRLEN len, STRLEN pvlim, UV flags)
                 case '\a':
                     Perl_sv_catpvf(aTHX_ dsv, "\\a"); ok = TRUE; break;
                 case '\\':
-                    Perl_sv_catpvf(aTHX_ dsv, "\\" ); ok = TRUE; break;
+                    Perl_sv_catpvf(aTHX_ dsv, "\\\\" ); ok = TRUE; break;
                 default: break;
                 }
             }
@@ -1853,7 +1851,7 @@ Perl_ibcmp_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const
               if (u1)
                    to_utf8_fold(p1, foldbuf1, &foldlen1);
               else {
-                   natbuf[0] = NATIVE_TO_UNI(*p1);
+                   natbuf[0] = *p1;
                    to_utf8_fold(natbuf, foldbuf1, &foldlen1);
               }
               q1 = foldbuf1;
@@ -1863,7 +1861,7 @@ Perl_ibcmp_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const
               if (u2)
                    to_utf8_fold(p2, foldbuf2, &foldlen2);
               else {
-                   natbuf[0] = NATIVE_TO_UNI(*p2);
+                   natbuf[0] = *p2;
                    to_utf8_fold(natbuf, foldbuf2, &foldlen2);
               }
               q2 = foldbuf2;