380 lines
7.6 KiB
C
380 lines
7.6 KiB
C
/* $XTermId: xutf8.c,v 1.13 2012/05/09 20:56:09 tom Exp $ */
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/*
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* Copyright (c) 2001 by Juliusz Chroboczek
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <xterm.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <X11/Xutil.h>
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#include <X11/Xmu/Xmu.h>
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#include <xutf8.h>
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#ifndef X_HAVE_UTF8_STRING
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#undef XA_UTF8_STRING
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#define KEYSYM2UCS_INCLUDED
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#include "keysym2ucs.c"
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Atom
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_xa_utf8_string(Display * dpy)
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{
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static AtomPtr p = NULL;
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if (p == NULL)
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p = XmuMakeAtom("UTF8_STRING");
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return XmuInternAtom(dpy, p);
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}
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#define XA_UTF8_STRING(dpy) _xa_utf8_string(dpy)
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static int
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utf8countBytes(int c)
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{
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if (c < 0)
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return 0;
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if (c <= 0x7F) {
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return 1;
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} else if (c <= 0x7FF) {
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return 2;
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} else if (c <= 0xFFFF) {
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return 3;
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} else
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return 4;
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}
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static void
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utf8insert(char *dest, int c, size_t *len_return)
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{
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if (c < 0)
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return;
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if (c <= 0x7F) {
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dest[0] = (char) c;
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*len_return = 1;
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} else if (c <= 0x7FF) {
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dest[0] = (char) (0xC0 | ((c >> 6) & 0x1F));
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dest[1] = (char) (0x80 | (c & 0x3F));
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*len_return = 2;
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} else if (c <= 0xFFFF) {
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dest[0] = (char) (0xE0 | ((c >> 12) & 0x0F));
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dest[1] = (char) (0x80 | ((c >> 6) & 0x3F));
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dest[2] = (char) (0x80 | (c & 0x3F));
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*len_return = 3;
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} else {
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dest[0] = (char) (0xF0 | ((c >> 18) & 0x07));
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dest[1] = (char) (0x80 | ((c >> 12) & 0x3f));
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dest[2] = (char) (0x80 | ((c >> 6) & 0x3f));
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dest[3] = (char) (0x80 | (c & 0x3f));
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*len_return = 4;
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}
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}
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static int
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l1countUtf8Bytes(char *s, size_t len)
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{
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int l = 0;
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while (len != 0) {
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if ((*s & 0x80) == 0)
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l++;
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else
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l += 2;
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s++;
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len--;
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}
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return l;
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}
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static void
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l1utf8copy(char *d, char *s, size_t len)
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{
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size_t l;
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while (len != 0) {
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utf8insert(d, (*s) & 0xFF, &l);
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d += (int) l;
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s++;
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len--;
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}
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}
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static void
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utf8l1strcpy(char *d, char *s)
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{
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#define SKIP do { s++; } while(((*s & 0x80) != 0) && (*s & 0xC0) != 0xC0)
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while (*s) {
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if ((*s & 0x80) == 0)
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*d++ = *s++;
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else if ((*s & 0x7C) == 0x40) {
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if ((s[1] & 0x80) == 0) {
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s++; /* incorrect UTF-8 */
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continue;
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} else if ((*s & 0x7C) == 0x40) {
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*d++ = (char) (((*s & 0x03) << 6) | (s[1] & 0x3F));
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s += 2;
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} else {
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*d++ = '?';
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SKIP;
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}
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} else {
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*d++ = '?';
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SKIP;
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}
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}
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*d = 0;
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#undef SKIP
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}
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/* Keep this in sync with utf8l1strcpy! */
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static int
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utf8l1strlen(char *s)
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{
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#define SKIP do { s++; } while(((*s & 0x80) != 0) && (*s & 0xC0) != 0xC0)
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int len = 0;
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while (*s) {
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if ((*s & 0x80) == 0) {
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s++;
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len++;
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} else if ((*s & 0x7C) == 0x40) {
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if ((s[1] & 0x80) == 0) {
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s++;
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continue;
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} else if ((*s & 0x7C) == 0x40) {
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len++;
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s += 2;
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} else {
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len++;
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SKIP;
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}
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} else {
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len++;
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SKIP;
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}
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}
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#undef SKIP
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return len;
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}
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int
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Xutf8TextPropertyToTextList(Display * dpy,
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const XTextProperty * tp,
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char ***list_return,
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int *count_return)
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{
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int utf8;
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char **list;
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int nelements;
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char *cp;
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char *start;
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size_t i;
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int j;
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size_t datalen = tp->nitems;
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size_t len;
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if (tp->format != 8)
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return XConverterNotFound;
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if (tp->encoding == XA_STRING)
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utf8 = 0;
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else if (tp->encoding == XA_UTF8_STRING(dpy))
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utf8 = 1;
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else
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return XConverterNotFound;
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if (datalen == 0) {
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*list_return = NULL;
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*count_return = 0;
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return 0;
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}
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nelements = 1;
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for (cp = (char *) tp->value, i = datalen; i != 0; cp++, i--) {
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if (*cp == '\0')
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nelements++;
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}
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list = TypeMallocN(char *, (unsigned) nelements);
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if (!list)
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return XNoMemory;
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if (utf8)
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len = datalen;
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else
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len = l1countUtf8Bytes((char *) tp->value, datalen);
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start = CastMallocN(char, len);
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if (!start) {
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free(list);
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return XNoMemory;
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}
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if (utf8)
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memcpy(start, (char *) tp->value, datalen);
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else
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l1utf8copy(start, (char *) tp->value, datalen);
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start[len] = '\0';
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for (cp = start, i = len + 1, j = 0; i != 0; cp++, i--) {
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if (*cp == '\0') {
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list[j] = start;
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start = (cp + 1);
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j++;
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}
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}
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list[j] = NULL;
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*list_return = list;
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*count_return = nelements;
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return 0;
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}
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int
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Xutf8TextListToTextProperty(Display * dpy,
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char **list,
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int count,
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XICCEncodingStyle style,
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XTextProperty * text_prop)
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{
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XTextProperty proto;
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unsigned int nbytes;
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int i;
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if (style != XStringStyle &&
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style != XCompoundTextStyle &&
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style != XStdICCTextStyle &&
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style != XUTF8StringStyle)
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return XConverterNotFound;
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if (style == XUTF8StringStyle) {
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for (i = 0, nbytes = 0; i < count; i++) {
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nbytes += (unsigned) ((list[i] ? strlen(list[i]) : 0) + 1);
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}
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} else {
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for (i = 0, nbytes = 0; i < count; i++) {
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nbytes += (unsigned) ((list[i] ? utf8l1strlen(list[i]) : 0) + 1);
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}
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}
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if (style == XCompoundTextStyle)
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proto.encoding = XA_COMPOUND_TEXT(dpy);
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else if (style == XUTF8StringStyle)
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proto.encoding = XA_UTF8_STRING(dpy);
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else
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proto.encoding = XA_STRING;
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proto.format = 8;
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if (nbytes)
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proto.nitems = nbytes - 1;
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else
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proto.nitems = 0;
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proto.value = NULL;
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if (nbytes > 0) {
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char *buf = TypeMallocN(char, nbytes);
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if (!buf)
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return XNoMemory;
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proto.value = (unsigned char *) buf;
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for (i = 0; i < count; i++) {
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char *arg = list[i];
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if (arg) {
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if (style == XUTF8StringStyle) {
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strcpy(buf, arg);
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} else {
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utf8l1strcpy(buf, arg);
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}
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buf += (strlen(buf) + 1);
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} else {
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*buf++ = '\0';
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}
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}
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} else {
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proto.value = CastMalloc(unsigned char); /* easier for client */
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if (!proto.value)
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return XNoMemory;
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proto.value[0] = '\0';
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}
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*text_prop = proto;
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return 0;
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}
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int
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Xutf8LookupString(XIC ic GCC_UNUSED,
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XKeyEvent * ev,
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char *buffer,
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int nbytes,
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KeySym * keysym_return,
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Status * status_return)
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{
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int rc;
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KeySym keysym;
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int codepoint;
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size_t len;
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rc = XLookupString(ev, buffer, nbytes, &keysym, NULL);
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if (rc > 0) {
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codepoint = buffer[0] & 0xFF;
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} else {
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codepoint = keysym2ucs(keysym);
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}
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if (codepoint < 0) {
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if (keysym == None) {
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*status_return = XLookupNone;
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} else {
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*status_return = XLookupKeySym;
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*keysym_return = keysym;
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}
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return 0;
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}
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if (nbytes < utf8countBytes(codepoint)) {
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*status_return = XBufferOverflow;
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return utf8countBytes(codepoint);
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}
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utf8insert(buffer, codepoint, &len);
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if (keysym != None) {
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*keysym_return = keysym;
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*status_return = XLookupBoth;
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} else {
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*status_return = XLookupChars;
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}
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return (int) len;
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}
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#else /* X_HAVE_UTF8_STRING */
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/* Silence the compiler */
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void
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xutf8_dummy(void)
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{
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return;
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}
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#endif
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