Author: ache
Date: Thu Sep 15 17:24:39 2016
New Revision: 305841
URL: https://svnweb.freebsd.org/changeset/base/305841
Log:
Implement multibyte encoding support for -v with fallback
MFC after: 7 days
Modified:
head/bin/cat/cat.c
Modified: head/bin/cat/cat.c
==============================================================================
--- head/bin/cat/cat.c Thu Sep 15 17:24:23 2016 (r305840)
+++ head/bin/cat/cat.c Thu Sep 15 17:24:39 2016 (r305841)
@@ -64,6 +64,8 @@ __FBSDID("$FreeBSD$");
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <wchar.h>
+#include <wctype.h>
static int bflag, eflag, lflag, nflag, sflag, tflag, vflag;
static int rval;
@@ -207,6 +209,7 @@ static void
cook_cat(FILE *fp)
{
int ch, gobble, line, prev;
+ wint_t wch;
/* Reset EOF condition on stdin. */
if (fp == stdin && feof(stdin))
@@ -239,18 +242,40 @@ cook_cat(FILE *fp)
continue;
}
} else if (vflag) {
- if (!isascii(ch) && !isprint(ch)) {
+ (void)ungetc(ch, fp);
+ /*
+ * Our getwc(3) doesn't change file position
+ * on error.
+ */
+ if ((wch = getwc(fp)) == WEOF) {
+ if (ferror(fp) && errno == EILSEQ) {
+ clearerr(fp);
+ /* Resync attempt. */
+ memset(&fp->_mbstate, 0,
sizeof(mbstate_t));
+ if ((ch = getc(fp)) == EOF)
+ break;
+ wch = ch;
+ goto ilseq;
+ } else
+ break;
+ }
+ if (!iswascii(wch) && !iswprint(wch)) {
+ilseq:
if (putchar('M') == EOF || putchar('-') == EOF)
break;
- ch = toascii(ch);
+ wch = toascii(wch);
}
- if (iscntrl(ch)) {
- if (putchar('^') == EOF ||
- putchar(ch == '\177' ? '?' :
- ch | 0100) == EOF)
+ if (iswcntrl(wch)) {
+ ch = toascii(wch);
+ ch = (ch == '\177') ? '?' : (ch | 0100);
+ if (putchar('^') == EOF || putchar(ch) == EOF)
break;
continue;
}
+ if (putwchar(wch) == WEOF)
+ break;
+ ch = -1;
+ continue;
}
if (putchar(ch) == EOF)
break;
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