src/usr.bin/less/charset.c - diff

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-version 1.24, 2019/05/15 19:36:20
+version 1.25, 2019/08/31 13:44:29
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  }
  /*
+  * Like mbtowc(3), except that it converts the multibyte character
+  * preceding ps rather than the one starting at ps.
+  */
+ int
+ mbtowc_left(wchar_t *pwc, const char *ps, size_t psz)
+ {
+         size_t sz = 0;
+         int len;
+         do {
+                 if (++sz > psz)
+                         return -1;
+         } while (utf_mode && IS_UTF8_TRAIL(ps[-sz]));
+         if ((len = mbtowc(pwc, ps - sz, sz)) == -1) {
+                 (void)mbtowc(NULL, NULL, 0);
+                 return -1;
+         }
+         return len == sz || (len == 0 && sz == 1) ? len : -1;
+ }
+ /*
   * Is a given character a "control" character?
   */
  static int