summaryrefslogtreecommitdiffstats
path: root/lib/sh/strvis.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
commit6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321 (patch)
treef63ce19d57fad3ac4a15bc26dbfbfa2b834111b5 /lib/sh/strvis.c
parentInitial commit. (diff)
downloadbash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.tar.xz
bash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.zip
Adding upstream version 5.2.15.upstream/5.2.15upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/sh/strvis.c')
-rw-r--r--lib/sh/strvis.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/lib/sh/strvis.c b/lib/sh/strvis.c
new file mode 100644
index 0000000..7a11d57
--- /dev/null
+++ b/lib/sh/strvis.c
@@ -0,0 +1,154 @@
+/* strvis.c - make unsafe graphical characters in a string visible. */
+
+/* Copyright (C) 2022 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This is a stripped-down version suitable for the shell's use. */
+#include <config.h>
+
+#include <unistd.h>
+
+#include "bashansi.h"
+#include <stdio.h>
+
+#include "chartypes.h"
+#include "bashintl.h"
+#include "shmbutil.h"
+
+#define SAFECHAR(c) ((c) == ' ' || (c) == '\t')
+
+#ifndef RUBOUT
+#define RUBOUT 0x7f
+#endif
+
+#ifndef CTRL_CHAR
+#define CTRL_CHAR(c) ((c) < 0x20)
+#endif
+
+#ifndef META_CHAR
+#define META_CHAR(c) ((c) > 0x7f && (c) <= UCHAR_MAX)
+#endif
+
+#ifndef UNCTRL
+#define UNCTRL(c) (TOUPPER ((c) | 0x40))
+#endif
+
+#ifndef UNMETA
+#define UNMETA(c) ((c) & 0x7f)
+#endif
+
+int
+sh_charvis (s, sindp, slen, ret, rindp)
+ const char *s;
+ size_t *sindp;
+ size_t slen;
+ char *ret;
+ size_t *rindp;
+{
+ unsigned char c;
+ size_t si, ri;
+ const char *send;
+ DECLARE_MBSTATE;
+
+ si = *sindp;
+ ri = *rindp;
+ c = s[*sindp];
+
+#if defined (HANDLE_MULTIBYTE)
+ send = (locale_mb_cur_max > 1) ? s + slen : 0;
+#else
+ send = 0;
+#endif
+
+ if (SAFECHAR (c))
+ {
+ ret[ri++] = c;
+ si++;
+ }
+ else if (c == RUBOUT)
+ {
+ ret[ri++] = '^';
+ ret[ri++] = '?';
+ si++;
+ }
+ else if (CTRL_CHAR (c))
+ {
+ ret[ri++] = '^';
+ ret[ri++] = UNCTRL (c);
+ si++;
+ }
+#if defined (HANDLE_MULTIBYTE)
+ else if (locale_utf8locale && (c & 0x80))
+ COPY_CHAR_I (ret, ri, s, send, si);
+ else if (locale_mb_cur_max > 1 && is_basic (c) == 0)
+ COPY_CHAR_I (ret, ri, s, send, si);
+#endif
+ else if (META_CHAR (c))
+ {
+ ret[ri++] = 'M';
+ ret[ri++] = '-';
+ ret[ri++] = UNMETA (c);
+ si++;
+ }
+ else
+ ret[ri++] = s[si++];
+
+ *sindp = si;
+ *rindp = ri;
+
+ return si;
+}
+
+/* Return a new string with `unsafe' non-graphical characters in S rendered
+ in a visible way. */
+char *
+sh_strvis (string)
+ const char *string;
+{
+ size_t slen, sind;
+ char *ret;
+ size_t retind, retsize;
+ unsigned char c;
+ DECLARE_MBSTATE;
+
+ if (string == 0)
+ return 0;
+ if (*string == '\0')
+ {
+ if ((ret = (char *)malloc (1)) == 0)
+ return 0;
+ ret[0] = '\0';
+ return ret;
+ }
+
+ slen = strlen (string);
+ retsize = 3 * slen + 1;
+
+ ret = (char *)malloc (retsize);
+ if (ret == 0)
+ return 0;
+
+ retind = 0;
+ sind = 0;
+
+ while (string[sind])
+ sind = sh_charvis (string, &sind, slen, ret, &retind);
+
+ ret[retind] = '\0';
+ return ret;
+}