diff options
Diffstat (limited to 'lib/libc/locale/utf2.c')
| -rw-r--r-- | lib/libc/locale/utf2.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/lib/libc/locale/utf2.c b/lib/libc/locale/utf2.c new file mode 100644 index 0000000..846fad9 --- /dev/null +++ b/lib/libc/locale/utf2.c @@ -0,0 +1,148 @@ +/*- + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Paul Borman at Krystal Technologies. + * + * 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 University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)utf2.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <errno.h> +#include <rune.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> + +rune_t _UTF2_sgetrune __P((const char *, size_t, char const **)); +int _UTF2_sputrune __P((rune_t, char *, size_t, char **)); + +static _utf_count[16] = { + 1, 1, 1, 1, 1, 1, 1, 1, + 0, 0, 0, 0, 2, 2, 3, 0, +}; + +int +_UTF2_init(rl) + _RuneLocale *rl; +{ + rl->sgetrune = _UTF2_sgetrune; + rl->sputrune = _UTF2_sputrune; + _CurrentRuneLocale = rl; + __mb_cur_max = 3; + return (0); +} + +rune_t +_UTF2_sgetrune(string, n, result) + const char *string; + size_t n; + char const **result; +{ + int c; + + if (n < 1 || (c = _utf_count[(*string >> 4) & 0xf]) > n) { + if (result) + *result = string; + return (_INVALID_RUNE); + } + switch (c) { + case 1: + if (result) + *result = string + 1; + return (*string & 0xff); + case 2: + if ((string[1] & 0xC0) != 0x80) + goto encoding_error; + if (result) + *result = string + 2; + return (((string[0] & 0x1F) << 6) | (string[1] & 0x3F)); + case 3: + if ((string[1] & 0xC0) != 0x80 || (string[2] & 0xC0) != 0x80) + goto encoding_error; + if (result) + *result = string + 3; + return (((string[0] & 0x1F) << 12) | ((string[1] & 0x3F) << 6) + | (string[2] & 0x3F)); + default: +encoding_error: if (result) + *result = string + 1; + return (_INVALID_RUNE); + } +} + +int +_UTF2_sputrune(c, string, n, result) + rune_t c; + char *string, **result; + size_t n; +{ + if (c & 0xF800) { + if (n >= 3) { + if (string) { + string[0] = 0xE0 | ((c >> 12) & 0x0F); + string[1] = 0x80 | ((c >> 6) & 0x3F); + string[2] = 0x80 | ((c) & 0x3F); + } + if (result) + *result = string + 3; + } else + if (result) + *result = NULL; + + return (3); + } else + if (c & 0x0780) { + if (n >= 2) { + if (string) { + string[0] = 0xC0 | ((c >> 6) & 0x1F); + string[1] = 0x80 | ((c) & 0x3F); + } + if (result) + *result = string + 2; + } else + if (result) + *result = NULL; + return (2); + } else { + if (n >= 1) { + if (string) + string[0] = c; + if (result) + *result = string + 1; + } else + if (result) + *result = NULL; + return (1); + } +} |
