361 lines
8.5 KiB
C
361 lines
8.5 KiB
C
/* $NetBSD: chartype.c,v 1.4 2010/04/15 00:55:57 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* chartype.c: character classification and meta information
|
|
*/
|
|
#include "config.h"
|
|
#if !defined(lint) && !defined(SCCSID)
|
|
__RCSID("$NetBSD: chartype.c,v 1.4 2010/04/15 00:55:57 christos Exp $");
|
|
#endif /* not lint && not SCCSID */
|
|
#include "el.h"
|
|
#include <stdlib.h>
|
|
|
|
#define CT_BUFSIZ 1024
|
|
|
|
#ifdef WIDECHAR
|
|
protected void
|
|
ct_conv_buff_resize(ct_buffer_t *conv, size_t mincsize, size_t minwsize)
|
|
{
|
|
void *p;
|
|
if (mincsize > conv->csize) {
|
|
conv->csize = mincsize;
|
|
p = el_realloc(conv->cbuff, conv->csize);
|
|
if (p == NULL) {
|
|
conv->csize = 0;
|
|
el_free(conv->cbuff);
|
|
conv->cbuff = NULL;
|
|
} else
|
|
conv->cbuff = p;
|
|
}
|
|
|
|
if (minwsize > conv->wsize) {
|
|
conv->wsize = minwsize;
|
|
p = el_realloc(conv->wbuff, conv->wsize);
|
|
if (p == NULL) {
|
|
conv->wsize = 0;
|
|
el_free(conv->wbuff);
|
|
conv->wbuff = NULL;
|
|
} else
|
|
conv->wbuff = p;
|
|
}
|
|
}
|
|
|
|
|
|
public char *
|
|
ct_encode_string(const Char *s, ct_buffer_t *conv)
|
|
{
|
|
char *dst;
|
|
ssize_t used = 0;
|
|
|
|
if (!s)
|
|
return NULL;
|
|
if (!conv->cbuff)
|
|
ct_conv_buff_resize(conv, CT_BUFSIZ, 0);
|
|
if (!conv->cbuff)
|
|
return NULL;
|
|
|
|
dst = conv->cbuff;
|
|
while (*s) {
|
|
used = ct_encode_char(dst, (int)(conv->csize -
|
|
(dst - conv->cbuff)), *s);
|
|
if (used == -1) { /* failed to encode, need more buffer space */
|
|
used = dst - conv->cbuff;
|
|
ct_conv_buff_resize(conv, conv->csize + CT_BUFSIZ, 0);
|
|
if (!conv->cbuff)
|
|
return NULL;
|
|
dst = conv->cbuff + used;
|
|
/* don't increment s here - we want to retry it! */
|
|
}
|
|
else
|
|
++s;
|
|
dst += used;
|
|
}
|
|
if (dst >= (conv->cbuff + conv->csize)) {
|
|
used = dst - conv->cbuff;
|
|
ct_conv_buff_resize(conv, conv->csize + 1, 0);
|
|
if (!conv->cbuff)
|
|
return NULL;
|
|
dst = conv->cbuff + used;
|
|
}
|
|
*dst = '\0';
|
|
return conv->cbuff;
|
|
}
|
|
|
|
public Char *
|
|
ct_decode_string(const char *s, ct_buffer_t *conv)
|
|
{
|
|
size_t len = 0;
|
|
|
|
if (!s)
|
|
return NULL;
|
|
if (!conv->wbuff)
|
|
ct_conv_buff_resize(conv, 0, CT_BUFSIZ);
|
|
if (!conv->wbuff)
|
|
return NULL;
|
|
|
|
len = ct_mbstowcs(0, s, 0);
|
|
if (len > conv->wsize)
|
|
ct_conv_buff_resize(conv, 0, len + 1);
|
|
if (!conv->wbuff)
|
|
return NULL;
|
|
ct_mbstowcs(conv->wbuff, s, conv->wsize);
|
|
return conv->wbuff;
|
|
}
|
|
|
|
|
|
protected Char **
|
|
ct_decode_argv(int argc, const char *argv[], ct_buffer_t *conv)
|
|
{
|
|
size_t bufspace;
|
|
int i;
|
|
Char *p;
|
|
Char **wargv;
|
|
ssize_t bytes;
|
|
|
|
/* Make sure we have enough space in the conversion buffer to store all
|
|
* the argv strings. */
|
|
for (i = 0, bufspace = 0; i < argc; ++i)
|
|
bufspace += argv[i] ? strlen(argv[i]) + 1 : 0;
|
|
ct_conv_buff_resize(conv, 0, bufspace);
|
|
if (!conv->wsize)
|
|
return NULL;
|
|
|
|
wargv = el_malloc(argc * sizeof(*wargv));
|
|
|
|
for (i = 0, p = conv->wbuff; i < argc; ++i) {
|
|
if (!argv[i]) { /* don't pass null pointers to mbstowcs */
|
|
wargv[i] = NULL;
|
|
continue;
|
|
} else {
|
|
wargv[i] = p;
|
|
bytes = mbstowcs(p, argv[i], bufspace);
|
|
}
|
|
if (bytes == -1) {
|
|
el_free(wargv);
|
|
return NULL;
|
|
} else
|
|
bytes++; /* include '\0' in the count */
|
|
bufspace -= bytes;
|
|
p += bytes;
|
|
}
|
|
|
|
return wargv;
|
|
}
|
|
|
|
|
|
protected size_t
|
|
ct_enc_width(Char c)
|
|
{
|
|
/* UTF-8 encoding specific values */
|
|
if (c < 0x80)
|
|
return 1;
|
|
else if (c < 0x0800)
|
|
return 2;
|
|
else if (c < 0x10000)
|
|
return 3;
|
|
else if (c < 0x110000)
|
|
return 4;
|
|
else
|
|
return 0; /* not a valid codepoint */
|
|
}
|
|
|
|
protected ssize_t
|
|
ct_encode_char(char *dst, size_t len, Char c)
|
|
{
|
|
ssize_t l = 0;
|
|
if (len < ct_enc_width(c))
|
|
return -1;
|
|
l = ct_wctomb(dst, c);
|
|
|
|
if (l < 0) {
|
|
ct_wctomb_reset;
|
|
l = 0;
|
|
}
|
|
return l;
|
|
}
|
|
#endif
|
|
|
|
protected const Char *
|
|
ct_visual_string(const Char *s)
|
|
{
|
|
static Char *buff = NULL;
|
|
static size_t buffsize = 0;
|
|
void *p;
|
|
Char *dst;
|
|
ssize_t used = 0;
|
|
|
|
if (!s)
|
|
return NULL;
|
|
if (!buff) {
|
|
buffsize = CT_BUFSIZ;
|
|
buff = el_malloc(buffsize * sizeof(*buff));
|
|
}
|
|
dst = buff;
|
|
while (*s) {
|
|
used = ct_visual_char(dst, buffsize - (dst - buff), *s);
|
|
if (used == -1) { /* failed to encode, need more buffer space */
|
|
used = dst - buff;
|
|
buffsize += CT_BUFSIZ;
|
|
p = el_realloc(buff, buffsize * sizeof(*buff));
|
|
if (p == NULL)
|
|
goto out;
|
|
buff = p;
|
|
dst = buff + used;
|
|
/* don't increment s here - we want to retry it! */
|
|
}
|
|
else
|
|
++s;
|
|
dst += used;
|
|
}
|
|
if (dst >= (buff + buffsize)) { /* sigh */
|
|
buffsize += 1;
|
|
p = el_realloc(buff, buffsize * sizeof(*buff));
|
|
if (p == NULL)
|
|
goto out;
|
|
buff = p;
|
|
dst = buff + buffsize - 1;
|
|
}
|
|
*dst = 0;
|
|
return buff;
|
|
out:
|
|
el_free(buff);
|
|
buffsize = 0;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
protected int
|
|
ct_visual_width(Char c)
|
|
{
|
|
int t = ct_chr_class(c);
|
|
switch (t) {
|
|
case CHTYPE_ASCIICTL:
|
|
return 2; /* ^@ ^? etc. */
|
|
case CHTYPE_TAB:
|
|
return 1; /* Hmm, this really need to be handled outside! */
|
|
case CHTYPE_NL:
|
|
return 0; /* Should this be 1 instead? */
|
|
#ifdef WIDECHAR
|
|
case CHTYPE_PRINT:
|
|
return wcwidth(c);
|
|
case CHTYPE_NONPRINT:
|
|
if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */
|
|
return 8; /* \U+12345 */
|
|
else
|
|
return 7; /* \U+1234 */
|
|
#else
|
|
case CHTYPE_PRINT:
|
|
return 1;
|
|
case CHTYPE_NONPRINT:
|
|
return 4; /* \123 */
|
|
#endif
|
|
default:
|
|
return 0; /* should not happen */
|
|
}
|
|
}
|
|
|
|
|
|
protected ssize_t
|
|
ct_visual_char(Char *dst, size_t len, Char c)
|
|
{
|
|
int t = ct_chr_class(c);
|
|
switch (t) {
|
|
case CHTYPE_TAB:
|
|
case CHTYPE_NL:
|
|
case CHTYPE_ASCIICTL:
|
|
if (len < 2)
|
|
return -1; /* insufficient space */
|
|
*dst++ = '^';
|
|
if (c == '\177')
|
|
*dst = '?'; /* DEL -> ^? */
|
|
else
|
|
*dst = c | 0100; /* uncontrolify it */
|
|
return 2;
|
|
case CHTYPE_PRINT:
|
|
if (len < 1)
|
|
return -1; /* insufficient space */
|
|
*dst = c;
|
|
return 1;
|
|
case CHTYPE_NONPRINT:
|
|
/* we only use single-width glyphs for display,
|
|
* so this is right */
|
|
if ((ssize_t)len < ct_visual_width(c))
|
|
return -1; /* insufficient space */
|
|
#ifdef WIDECHAR
|
|
*dst++ = '\\';
|
|
*dst++ = 'U';
|
|
*dst++ = '+';
|
|
#define tohexdigit(v) "0123456789ABCDEF"[v]
|
|
if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */
|
|
*dst++ = tohexdigit(((unsigned int) c >> 16) & 0xf);
|
|
*dst++ = tohexdigit(((unsigned int) c >> 12) & 0xf);
|
|
*dst++ = tohexdigit(((unsigned int) c >> 8) & 0xf);
|
|
*dst++ = tohexdigit(((unsigned int) c >> 4) & 0xf);
|
|
*dst = tohexdigit(((unsigned int) c ) & 0xf);
|
|
return (c > 0xffff) ? 8 : 7;
|
|
#else
|
|
*dst++ = '\\';
|
|
#define tooctaldigit(v) ((v) + '0')
|
|
*dst++ = tooctaldigit(((unsigned int) c >> 6) & 0x7);
|
|
*dst++ = tooctaldigit(((unsigned int) c >> 3) & 0x7);
|
|
*dst++ = tooctaldigit(((unsigned int) c ) & 0x7);
|
|
#endif
|
|
/*FALLTHROUGH*/
|
|
/* these two should be handled outside this function */
|
|
default: /* we should never hit the default */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
protected int
|
|
ct_chr_class(Char c)
|
|
{
|
|
if (c == '\t')
|
|
return CHTYPE_TAB;
|
|
else if (c == '\n')
|
|
return CHTYPE_NL;
|
|
else if (IsASCII(c) && Iscntrl(c))
|
|
return CHTYPE_ASCIICTL;
|
|
else if (Isprint(c))
|
|
return CHTYPE_PRINT;
|
|
else
|
|
return CHTYPE_NONPRINT;
|
|
}
|