Re: Match length and multibyte characters

["Jun T." <takimoto-j@xxxxxxxxxxxxxxxxx>]

The following (with test) is a patch I sent to zsh-users
as a reply to users:20537.

The use of the macro MB_METASTRLEN2END means, if MULTIBYTE_SUPPORT if off,
ztrlenend(s+b,s+e) will be used instead of (e-b). I think this is better
because the string is metafied.


diff --git a/Src/glob.c b/Src/glob.c
index dea1bf5..43d135b 100644
--- a/Src/glob.c
+++ b/Src/glob.c
@@ -2491,17 +2491,17 @@ get_match_ret(char *s, int b, int e, int fl, char *replstr,
 	ll += 1 + (l - (e - b));
     if (fl & SUB_BIND) {
 	/* position of start of matched portion */
-	sprintf(buf, "%d ", b + 1);
+	sprintf(buf, "%d ", MB_METASTRLEN2END(s, 0, s+b) + 1);
 	ll += (bl = strlen(buf));
     }
     if (fl & SUB_EIND) {
 	/* position of end of matched portion */
-	sprintf(buf + bl, "%d ", e + 1);
+	sprintf(buf + bl, "%d ", MB_METASTRLEN2END(s, 0, s+e) + 1);
 	ll += (bl = strlen(buf));
     }
     if (fl & SUB_LEN) {
 	/* length of matched portion */
-	sprintf(buf + bl, "%d ", e - b);
+	sprintf(buf + bl, "%d ", MB_METASTRLEN2END(s+b, 0, s+e));
 	ll += (bl = strlen(buf));
     }
     if (bl)
diff --git a/Test/D07multibyte.ztst b/Test/D07multibyte.ztst
index ace191f..5ae9b2c 100644
--- a/Test/D07multibyte.ztst
+++ b/Test/D07multibyte.ztst
@@ -293,6 +293,21 @@
 >Ἐν ἀρχῇ ἦν ὁ λόγος, καὶ ὁ λόγος ἦν πρὸς τὸν θεόν, καὶ  ἦν ὁ λόγος
 >Ἐν ἀρχῇ ἦν ὁ λόγος, καὶ ὁ λόγος ἦν πρὸς τὸν θεόν, καὶ 
 
+  a="1ë34ë6"
+  print ${(BEN)a#*4}
+  print ${(BEN)a##*ë}
+  print ${(BEN)a%4*}
+  print ${(BEN)a%%ë*}
+  print ${(SBEN)a#ë3}
+  print ${(SBEN)a%4ë}
+0:Flags B, E, N and S in ${...#...} and ${...%...}
+>1 5 4
+>1 6 5
+>4 7 3
+>2 7 5
+>2 4 2
+>4 6 2
+
   foo=(κατέβην χθὲς εἰς Πειραιᾶ)
   print ${(l.3..¥.r.3..£.)foo}
   print ${(l.4..¥.r.2..£.)foo}