Import /usr/src/lib/libedit from NetBSD 8.0

1 files changed, 119 insertions, 0 deletions

diff --git a/bin/cash/libedit/chartype.h b/bin/cash/libedit/chartype.h
new file mode 100644
index 00000000..4cdd981d
--- /dev/null
+++ b/bin/cash/libedit/chartype.h
@@ -0,0 +1,119 @@
+/*	$NetBSD: chartype.h,v 1.35 2017/05/22 19:16:25 christos Exp $	*/
+
+/*-
+ * Copyright (c) 2009 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _h_chartype_f
+#define _h_chartype_f
+
+/* Ideally we should also test the value of the define to see if it
+ * supports non-BMP code points without requiring UTF-16, but nothing
+ * seems to actually advertise this properly, despite Unicode 3.1 having
+ * been around since 2001... */
+#if	!defined(__NetBSD__) && \
+	!defined(__sun) && \
+	!(defined(__APPLE__) && defined(__MACH__)) && \
+	!defined(__OpenBSD__) && \
+	!defined(__FreeBSD__) && \
+	!defined(__DragonFly__)
+#ifndef __STDC_ISO_10646__
+/* In many places it is assumed that the first 127 code points are ASCII
+ * compatible, so ensure wchar_t indeed does ISO 10646 and not some other
+ * funky encoding that could break us in weird and wonderful ways. */
+	#error wchar_t must store ISO 10646 characters
+#endif
+#endif
+
+/* Oh for a <uchar.h> with char32_t and __STDC_UTF_32__ in it...
+ * ref: ISO/IEC DTR 19769
+ */
+#if WCHAR_MAX < INT32_MAX
+#warning Build environment does not support non-BMP characters
+#endif
+
+/*
+ * Conversion buffer
+ */
+typedef struct ct_buffer_t {
+        char    *cbuff;
+        size_t  csize;
+        wchar_t *wbuff;
+        size_t  wsize;
+} ct_buffer_t;
+
+/* Encode a wide-character string and return the UTF-8 encoded result. */
+char *ct_encode_string(const wchar_t *, ct_buffer_t *);
+
+/* Decode a (multi)?byte string and return the wide-character string result. */
+wchar_t *ct_decode_string(const char *, ct_buffer_t *);
+
+/* Decode a (multi)?byte argv string array.
+ * The pointer returned must be free()d when done. */
+libedit_private wchar_t **ct_decode_argv(int, const char *[],  ct_buffer_t *);
+
+/* Encode a character into the destination buffer, provided there is sufficient
+ * buffer space available. Returns the number of bytes used up (zero if the
+ * character cannot be encoded, -1 if there was not enough space available). */
+libedit_private ssize_t ct_encode_char(char *, size_t, wchar_t);
+libedit_private size_t ct_enc_width(wchar_t);
+
+/* The maximum buffer size to hold the most unwieldy visual representation,
+ * in this case \U+nnnnn. */
+#define VISUAL_WIDTH_MAX ((size_t)8)
+
+/* The terminal is thought of in terms of X columns by Y lines. In the cases
+ * where a wide character takes up more than one column, the adjacent
+ * occupied column entries will contain this faux character. */
+#define MB_FILL_CHAR ((wchar_t)-1)
+
+/* Visual width of character c, taking into account ^? , \0177 and \U+nnnnn
+ * style visual expansions. */
+libedit_private int ct_visual_width(wchar_t);
+
+/* Turn the given character into the appropriate visual format, matching
+ * the width given by ct_visual_width(). Returns the number of characters used
+ * up, or -1 if insufficient space. Buffer length is in count of wchar_t's. */
+libedit_private ssize_t ct_visual_char(wchar_t *, size_t, wchar_t);
+
+/* Convert the given string into visual format, using the ct_visual_char()
+ * function. Uses a static buffer, so not threadsafe. */
+libedit_private const wchar_t *ct_visual_string(const wchar_t *, ct_buffer_t *);
+
+
+/* printable character, use ct_visual_width() to find out display width */
+#define CHTYPE_PRINT        ( 0)
+/* control character found inside the ASCII portion of the charset */
+#define CHTYPE_ASCIICTL     (-1)
+/* a \t */
+#define CHTYPE_TAB          (-2)
+/* a \n */
+#define CHTYPE_NL           (-3)
+/* non-printable character */
+#define CHTYPE_NONPRINT     (-4)
+/* classification of character c, as one of the above defines */
+libedit_private int ct_chr_class(wchar_t c);
+
+#endif /* _chartype_f */