130 lines
2.8 KiB
C
130 lines
2.8 KiB
C
|
/* MIT/X Consortium Copyright (c) 2012 Connor Lane Smith <cls@lubutu.com>
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
* copy of this software and associated documentation files (the "Software"),
|
||
|
|
* to deal in the Software without restriction, including without limitation
|
||
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
||
|
|
* Software is furnished to do so, subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be included in
|
||
|
|
* all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||
|
|
* DEALINGS IN THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
#include <string.h>
|
||
|
|
#include "../utf.h"
|
||
|
|
|
||
|
|
char *
|
||
|
|
utfecpy(char *to, char *end, const char *from)
|
||
|
|
{
|
||
|
|
Rune r = Runeerror;
|
||
|
|
size_t i, n;
|
||
|
|
|
||
|
|
/* seek through to find final full rune */
|
||
|
|
for(i = 0; r != '\0' && (n = charntorune(&r, &from[i], end - &to[i])); i += n)
|
||
|
|
;
|
||
|
|
memcpy(to, from, i); /* copy over bytes up to this rune */
|
||
|
|
|
||
|
|
if(i > 0 && r != '\0')
|
||
|
|
to[i] = '\0'; /* terminate if unterminated */
|
||
|
|
return &to[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t
|
||
|
|
utflen(const char *s)
|
||
|
|
{
|
||
|
|
const char *p = s;
|
||
|
|
size_t i;
|
||
|
|
Rune r;
|
||
|
|
|
||
|
|
for(i = 0; *p != '\0'; i++)
|
||
|
|
p += chartorune(&r, p);
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t
|
||
|
|
utfnlen(const char *s, size_t len)
|
||
|
|
{
|
||
|
|
const char *p = s;
|
||
|
|
size_t i;
|
||
|
|
Rune r;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
for(i = 0; (n = charntorune(&r, p, len-(p-s))) && r != '\0'; i++)
|
||
|
|
p += n;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *
|
||
|
|
utfrune(const char *s, Rune r)
|
||
|
|
{
|
||
|
|
if(r < Runeself) {
|
||
|
|
return strchr(s, r);
|
||
|
|
}
|
||
|
|
else if(r == Runeerror) {
|
||
|
|
Rune r0;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
for(; *s != '\0'; s += n) {
|
||
|
|
n = chartorune(&r0, s);
|
||
|
|
if(r == r0)
|
||
|
|
return (char *)s;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
char buf[UTFmax+1];
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if(!(n = runetochar(buf, &r)))
|
||
|
|
return NULL;
|
||
|
|
buf[n] = '\0';
|
||
|
|
return strstr(s, buf);
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *
|
||
|
|
utfrrune(const char *s, Rune r)
|
||
|
|
{
|
||
|
|
const char *p = NULL;
|
||
|
|
Rune r0;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if(r < Runeself)
|
||
|
|
return strrchr(s, r);
|
||
|
|
|
||
|
|
for(; *s != '\0'; s += n) {
|
||
|
|
n = chartorune(&r0, s);
|
||
|
|
if(r == r0)
|
||
|
|
p = s;
|
||
|
|
}
|
||
|
|
return (char *)p;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *
|
||
|
|
utfutf(const char *s, const char *t)
|
||
|
|
{
|
||
|
|
const char *p, *q;
|
||
|
|
Rune r0, r1, r2;
|
||
|
|
int n, m;
|
||
|
|
|
||
|
|
for(chartorune(&r0, t); (s = utfrune(s, r0)); s++) {
|
||
|
|
for(p = s, q = t; *q && *p; p += n, q += m) {
|
||
|
|
n = chartorune(&r1, p);
|
||
|
|
m = chartorune(&r2, q);
|
||
|
|
if(r1 != r2)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if(!*q)
|
||
|
|
return (char *)s;
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|