1 /* $NetBSD: chartype.c,v 1.10 2011/08/16 16:25:15 christos Exp $ */
4 * Copyright (c) 2009 The NetBSD Foundation, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the NetBSD
18 * Foundation, Inc. and its contributors.
19 * 4. Neither the name of The NetBSD Foundation nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
37 * chartype.c: character classification and meta information
40 #if !defined(lint) && !defined(SCCSID)
41 __RCSID("$NetBSD: chartype.c,v 1.10 2011/08/16 16:25:15 christos Exp $");
42 #endif /* not lint && not SCCSID */
46 #define CT_BUFSIZ ((size_t)1024)
50 ct_conv_buff_resize(ct_buffer_t *conv, size_t mincsize, size_t minwsize)
53 if (mincsize > conv->csize) {
54 conv->csize = mincsize;
55 p = el_realloc(conv->cbuff, conv->csize * sizeof(*conv->cbuff));
64 if (minwsize > conv->wsize) {
65 conv->wsize = minwsize;
66 p = el_realloc(conv->wbuff, conv->wsize * sizeof(*conv->wbuff));
78 ct_encode_string(const Char *s, ct_buffer_t *conv)
86 ct_conv_buff_resize(conv, CT_BUFSIZ, (size_t)0);
92 used = (ssize_t)(conv->csize - (size_t)(dst - conv->cbuff));
94 used = dst - conv->cbuff;
95 ct_conv_buff_resize(conv, conv->csize + CT_BUFSIZ,
99 dst = conv->cbuff + used;
101 used = ct_encode_char(dst, (size_t)5, *s);
102 if (used == -1) /* failed to encode, need more buffer space */
112 ct_decode_string(const char *s, ct_buffer_t *conv)
119 ct_conv_buff_resize(conv, (size_t)0, CT_BUFSIZ);
123 len = ct_mbstowcs(NULL, s, (size_t)0);
124 if (len == (size_t)-1)
126 if (len > conv->wsize)
127 ct_conv_buff_resize(conv, (size_t)0, len + 1);
130 ct_mbstowcs(conv->wbuff, s, conv->wsize);
136 ct_decode_argv(int argc, const char *argv[], ct_buffer_t *conv)
144 /* Make sure we have enough space in the conversion buffer to store all
145 * the argv strings. */
146 for (i = 0, bufspace = 0; i < argc; ++i)
147 bufspace += argv[i] ? strlen(argv[i]) + 1 : 0;
148 ct_conv_buff_resize(conv, (size_t)0, bufspace);
152 wargv = el_malloc((size_t)argc * sizeof(*wargv));
154 for (i = 0, p = conv->wbuff; i < argc; ++i) {
155 if (!argv[i]) { /* don't pass null pointers to mbstowcs */
160 bytes = (ssize_t)mbstowcs(p, argv[i], bufspace);
166 bytes++; /* include '\0' in the count */
167 bufspace -= (size_t)bytes;
178 /* UTF-8 encoding specific values */
183 else if (c < 0x10000)
185 else if (c < 0x110000)
188 return 0; /* not a valid codepoint */
192 ct_encode_char(char *dst, size_t len, Char c)
195 if (len < ct_enc_width(c))
197 l = ct_wctomb(dst, c);
207 protected const Char *
208 ct_visual_string(const Char *s)
210 static Char *buff = NULL;
211 static size_t buffsize = 0;
219 buffsize = CT_BUFSIZ;
220 buff = el_malloc(buffsize * sizeof(*buff));
224 used = ct_visual_char(dst, buffsize - (size_t)(dst - buff), *s);
225 if (used == -1) { /* failed to encode, need more buffer space */
227 buffsize += CT_BUFSIZ;
228 p = el_realloc(buff, buffsize * sizeof(*buff));
233 /* don't increment s here - we want to retry it! */
239 if (dst >= (buff + buffsize)) { /* sigh */
241 p = el_realloc(buff, buffsize * sizeof(*buff));
245 dst = buff + buffsize - 1;
258 ct_visual_width(Char c)
260 int t = ct_chr_class(c);
262 case CHTYPE_ASCIICTL:
263 return 2; /* ^@ ^? etc. */
265 return 1; /* Hmm, this really need to be handled outside! */
267 return 0; /* Should this be 1 instead? */
271 case CHTYPE_NONPRINT:
272 if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */
273 return 8; /* \U+12345 */
275 return 7; /* \U+1234 */
279 case CHTYPE_NONPRINT:
283 return 0; /* should not happen */
289 ct_visual_char(Char *dst, size_t len, Char c)
291 int t = ct_chr_class(c);
295 case CHTYPE_ASCIICTL:
297 return -1; /* insufficient space */
300 *dst = '?'; /* DEL -> ^? */
302 *dst = c | 0100; /* uncontrolify it */
306 return -1; /* insufficient space */
309 case CHTYPE_NONPRINT:
310 /* we only use single-width glyphs for display,
311 * so this is right */
312 if ((ssize_t)len < ct_visual_width(c))
313 return -1; /* insufficient space */
318 #define tohexdigit(v) "0123456789ABCDEF"[v]
319 if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */
320 *dst++ = tohexdigit(((unsigned int) c >> 16) & 0xf);
321 *dst++ = tohexdigit(((unsigned int) c >> 12) & 0xf);
322 *dst++ = tohexdigit(((unsigned int) c >> 8) & 0xf);
323 *dst++ = tohexdigit(((unsigned int) c >> 4) & 0xf);
324 *dst = tohexdigit(((unsigned int) c ) & 0xf);
325 return c > 0xffff ? 8 : 7;
328 #define tooctaldigit(v) ((v) + '0')
329 *dst++ = tooctaldigit(((unsigned int) c >> 6) & 0x7);
330 *dst++ = tooctaldigit(((unsigned int) c >> 3) & 0x7);
331 *dst++ = tooctaldigit(((unsigned int) c ) & 0x7);
334 /* these two should be handled outside this function */
335 default: /* we should never hit the default */
350 else if (IsASCII(c) && Iscntrl(c))
351 return CHTYPE_ASCIICTL;
355 return CHTYPE_NONPRINT;