diff options
Diffstat (limited to 'lib/libc/locale/euc.c')
| -rw-r--r-- | lib/libc/locale/euc.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/lib/libc/locale/euc.c b/lib/libc/locale/euc.c new file mode 100644 index 0000000..e58c855 --- /dev/null +++ b/lib/libc/locale/euc.c @@ -0,0 +1,220 @@ +/*- + * 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[] = "@(#)euc.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> + +#include <errno.h> +#include <rune.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> + +rune_t _EUC_sgetrune __P((const char *, size_t, char const **)); +int _EUC_sputrune __P((rune_t, char *, size_t, char **)); + +typedef struct { + int count[4]; + rune_t bits[4]; + rune_t mask; +} _EucInfo; + +int +_EUC_init(rl) + _RuneLocale *rl; +{ + _EucInfo *ei; + int x; + char *v, *e; + + rl->sgetrune = _EUC_sgetrune; + rl->sputrune = _EUC_sputrune; + + if (!rl->variable) { + free(rl); + return (EFTYPE); + } + v = (char *) rl->variable; + + while (*v == ' ' || *v == '\t') + ++v; + + if ((ei = malloc(sizeof(_EucInfo))) == NULL) { + free(rl); + return (ENOMEM); + } + for (x = 0; x < 4; ++x) { + ei->count[x] = (int) strtol(v, &e, 0); + if (v == e || !(v = e)) { + free(rl); + free(ei); + return (EFTYPE); + } + while (*v == ' ' || *v == '\t') + ++v; + ei->bits[x] = (int) strtol(v, &e, 0); + if (v == e || !(v = e)) { + free(rl); + free(ei); + return (EFTYPE); + } + while (*v == ' ' || *v == '\t') + ++v; + } + ei->mask = (int)strtol(v, &e, 0); + if (v == e || !(v = e)) { + free(rl); + free(ei); + return (EFTYPE); + } + if (sizeof(_EucInfo) <= rl->variable_len) { + memcpy(rl->variable, ei, sizeof(_EucInfo)); + free(ei); + } else { + rl->variable = &ei; + } + rl->variable_len = sizeof(_EucInfo); + _CurrentRuneLocale = rl; + __mb_cur_max = 3; + return (0); +} + +#define CEI ((_EucInfo *)(_CurrentRuneLocale->variable)) + +#define _SS2 0x008e +#define _SS3 0x008f + +static inline int +_euc_set(c) + u_int c; +{ + c &= 0xff; + + return ((c & 0x80) ? c == _SS3 ? 3 : c == _SS2 ? 2 : 1 : 0); +} +rune_t +_EUC_sgetrune(string, n, result) + const char *string; + size_t n; + char const **result; +{ + rune_t rune = 0; + int len, set; + + if (n < 1 || (len = CEI->count[set = _euc_set(*string)]) > n) { + if (result) + *result = string; + return (_INVALID_RUNE); + } + switch (set) { + case 3: + case 2: + --len; + ++string; + /* FALLTHROUGH */ + case 1: + case 0: + while (len-- > 0) + rune = (rune << 8) | ((u_int)(*string++) & 0xff); + break; + } + if (result) + *result = string; + return ((rune & ~CEI->mask) | CEI->bits[set]); +} + +int +_EUC_sputrune(c, string, n, result) + rune_t c; + char *string, **result; + size_t n; +{ + rune_t m = c & CEI->mask; + rune_t nm = c & ~m; + int i, len; + + if (m == CEI->bits[1]) { +CodeSet1: + /* Codeset 1: The first byte must have 0x80 in it. */ + i = len = CEI->count[1]; + if (n >= len) { + if (result) + *result = string + len; + while (i-- > 0) + *string++ = (nm >> (i << 3)) | 0x80; + } else + if (result) + *result = (char *) 0; + } else { + if (m == CEI->bits[0]) { + i = len = CEI->count[0]; + if (n < len) { + if (result) + *result = NULL; + return (len); + } + } else + if (m == CEI->bits[2]) { + i = len = CEI->count[2]; + if (n < len) { + if (result) + *result = NULL; + return (len); + } + *string++ = _SS2; + --i; + } else + if (m == CEI->bits[3]) { + i = len = CEI->count[3]; + if (n < len) { + if (result) + *result = NULL; + return (len); + } + *string++ = _SS3; + --i; + } else + goto CodeSet1; /* Bletch */ + while (i-- > 0) + *string++ = (nm >> (i << 3)) & 0xff; + if (result) + *result = string; + } + return (len); +} |
