diff options
Diffstat (limited to 'lib/libc/locale/collate.c')
| -rw-r--r-- | lib/libc/locale/collate.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/lib/libc/locale/collate.c b/lib/libc/locale/collate.c new file mode 100644 index 0000000..e87b6dc --- /dev/null +++ b/lib/libc/locale/collate.c @@ -0,0 +1,348 @@ +/*- + * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua> + * at Electronni Visti IA, Kiev, Ukraine. + * All rights reserved. + * + * Copyright (c) 2011 The FreeBSD Foundation + * All rights reserved. + * Portions of this software were developed by David Chisnall + * under sponsorship from the FreeBSD Foundation. + * + * Copyright (c) 2011 The FreeBSD Foundation + * All rights reserved. + * Portions of this software were developed by David Chisnall + * under sponsorship from the FreeBSD Foundation. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "namespace.h" +#include <arpa/inet.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <sysexits.h> +#include "un-namespace.h" + +#include "collate.h" +#include "setlocale.h" +#include "ldpart.h" + +#include "libc_private.h" + +/* + * To avoid modifying the original (single-threaded) code too much, we'll just + * define the old globals as fields inside the table. + * + * We also modify the collation table test functions to search the thread-local + * table first and the global table second. + */ +#define __collate_load_error (table->__collate_load_error) +#define __collate_substitute_nontrivial (table->__collate_substitute_nontrivial) +#define __collate_substitute_table_ptr (table->__collate_substitute_table_ptr) +#define __collate_char_pri_table_ptr (table->__collate_char_pri_table_ptr) +#define __collate_chain_pri_table (table->__collate_chain_pri_table) + + +struct xlocale_collate __xlocale_global_collate = { + {{0}, "C"}, 1, 0 +}; + + struct xlocale_collate __xlocale_C_collate = { + {{0}, "C"}, 1, 0 +}; + +void __collate_err(int ex, const char *f) __dead2; + +int +__collate_load_tables_l(const char *encoding, struct xlocale_collate *table); + +static void +destruct_collate(void *t) +{ + struct xlocale_collate *table = t; + if (__collate_chain_pri_table) { + free(__collate_chain_pri_table); + } + free(t); +} + +void * +__collate_load(const char *encoding, locale_t unused) +{ + if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) { + return &__xlocale_C_collate; + } + struct xlocale_collate *table = calloc(sizeof(struct xlocale_collate), 1); + table->header.header.destructor = destruct_collate; + // FIXME: Make sure that _LDP_CACHE is never returned. We should be doing + // the caching outside of this section + if (__collate_load_tables_l(encoding, table) != _LDP_LOADED) { + xlocale_release(table); + return NULL; + } + return table; +} + +/** + * Load the collation tables for the specified encoding into the global table. + */ +int +__collate_load_tables(const char *encoding) +{ + return __collate_load_tables_l(encoding, &__xlocale_global_collate); +} + +int +__collate_load_tables_l(const char *encoding, struct xlocale_collate *table) +{ + FILE *fp; + int i, saverr, chains; + uint32_t u32; + char strbuf[STR_LEN], buf[PATH_MAX]; + void *TMP_substitute_table, *TMP_char_pri_table, *TMP_chain_pri_table; + + /* 'encoding' must be already checked. */ + if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) { + __collate_load_error = 1; + return (_LDP_CACHE); + } + + /* 'PathLocale' must be already set & checked. */ + /* Range checking not needed, encoding has fixed size */ + (void)strcpy(buf, _PathLocale); + (void)strcat(buf, "/"); + (void)strcat(buf, encoding); + (void)strcat(buf, "/LC_COLLATE"); + if ((fp = fopen(buf, "r")) == NULL) + return (_LDP_ERROR); + + if (fread(strbuf, sizeof(strbuf), 1, fp) != 1) { + saverr = errno; + (void)fclose(fp); + errno = saverr; + return (_LDP_ERROR); + } + chains = -1; + if (strcmp(strbuf, COLLATE_VERSION) == 0) + chains = 0; + else if (strcmp(strbuf, COLLATE_VERSION1_2) == 0) + chains = 1; + if (chains < 0) { + (void)fclose(fp); + errno = EFTYPE; + return (_LDP_ERROR); + } + if (chains) { + if (fread(&u32, sizeof(u32), 1, fp) != 1) { + saverr = errno; + (void)fclose(fp); + errno = saverr; + return (_LDP_ERROR); + } + if ((chains = (int)ntohl(u32)) < 1) { + (void)fclose(fp); + errno = EFTYPE; + return (_LDP_ERROR); + } + } else + chains = TABLE_SIZE; + + if ((TMP_substitute_table = + malloc(sizeof(__collate_substitute_table))) == NULL) { + saverr = errno; + (void)fclose(fp); + errno = saverr; + return (_LDP_ERROR); + } + if ((TMP_char_pri_table = + malloc(sizeof(__collate_char_pri_table))) == NULL) { + saverr = errno; + free(TMP_substitute_table); + (void)fclose(fp); + errno = saverr; + return (_LDP_ERROR); + } + if ((TMP_chain_pri_table = + malloc(sizeof(*__collate_chain_pri_table) * chains)) == NULL) { + saverr = errno; + free(TMP_substitute_table); + free(TMP_char_pri_table); + (void)fclose(fp); + errno = saverr; + return (_LDP_ERROR); + } + +#define FREAD(a, b, c, d) \ +{ \ + if (fread(a, b, c, d) != c) { \ + saverr = errno; \ + free(TMP_substitute_table); \ + free(TMP_char_pri_table); \ + free(TMP_chain_pri_table); \ + (void)fclose(d); \ + errno = saverr; \ + return (_LDP_ERROR); \ + } \ +} + + FREAD(TMP_substitute_table, sizeof(__collate_substitute_table), 1, fp); + FREAD(TMP_char_pri_table, sizeof(__collate_char_pri_table), 1, fp); + FREAD(TMP_chain_pri_table, + sizeof(*__collate_chain_pri_table), chains, fp); + (void)fclose(fp); + + if (__collate_substitute_table_ptr != NULL) + free(__collate_substitute_table_ptr); + __collate_substitute_table_ptr = TMP_substitute_table; + if (__collate_char_pri_table_ptr != NULL) + free(__collate_char_pri_table_ptr); + __collate_char_pri_table_ptr = TMP_char_pri_table; + for (i = 0; i < UCHAR_MAX + 1; i++) { + __collate_char_pri_table[i].prim = + ntohl(__collate_char_pri_table[i].prim); + __collate_char_pri_table[i].sec = + ntohl(__collate_char_pri_table[i].sec); + } + if (__collate_chain_pri_table != NULL) + free(__collate_chain_pri_table); + __collate_chain_pri_table = TMP_chain_pri_table; + for (i = 0; i < chains; i++) { + __collate_chain_pri_table[i].prim = + ntohl(__collate_chain_pri_table[i].prim); + __collate_chain_pri_table[i].sec = + ntohl(__collate_chain_pri_table[i].sec); + } + __collate_substitute_nontrivial = 0; + for (i = 0; i < UCHAR_MAX + 1; i++) { + if (__collate_substitute_table[i][0] != i || + __collate_substitute_table[i][1] != 0) { + __collate_substitute_nontrivial = 1; + break; + } + } + __collate_load_error = 0; + + return (_LDP_LOADED); +} + +u_char * +__collate_substitute(struct xlocale_collate *table, const u_char *s) +{ + int dest_len, len, nlen; + int delta = strlen(s); + u_char *dest_str = NULL; + + if (s == NULL || *s == '\0') + return (__collate_strdup("")); + delta += delta / 8; + dest_str = malloc(dest_len = delta); + if (dest_str == NULL) + __collate_err(EX_OSERR, __func__); + len = 0; + while (*s) { + nlen = len + strlen(__collate_substitute_table[*s]); + if (dest_len <= nlen) { + dest_str = reallocf(dest_str, dest_len = nlen + delta); + if (dest_str == NULL) + __collate_err(EX_OSERR, __func__); + } + (void)strcpy(dest_str + len, __collate_substitute_table[*s++]); + len = nlen; + } + return (dest_str); +} + +void +__collate_lookup(struct xlocale_collate *table, const u_char *t, int *len, int *prim, int *sec) +{ + struct __collate_st_chain_pri *p2; + + *len = 1; + *prim = *sec = 0; + for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++) { + if (*t == p2->str[0] && + strncmp(t, p2->str, strlen(p2->str)) == 0) { + *len = strlen(p2->str); + *prim = p2->prim; + *sec = p2->sec; + return; + } + } + *prim = __collate_char_pri_table[*t].prim; + *sec = __collate_char_pri_table[*t].sec; +} + +u_char * +__collate_strdup(u_char *s) +{ + u_char *t = strdup(s); + + if (t == NULL) + __collate_err(EX_OSERR, __func__); + return (t); +} + +void +__collate_err(int ex, const char *f) +{ + const char *s; + int serrno = errno; + + s = _getprogname(); + _write(STDERR_FILENO, s, strlen(s)); + _write(STDERR_FILENO, ": ", 2); + s = f; + _write(STDERR_FILENO, s, strlen(s)); + _write(STDERR_FILENO, ": ", 2); + s = strerror(serrno); + _write(STDERR_FILENO, s, strlen(s)); + _write(STDERR_FILENO, "\n", 1); + exit(ex); +} + +#ifdef COLLATE_DEBUG +void +__collate_print_tables() +{ + int i; + struct __collate_st_chain_pri *p2; + + printf("Substitute table:\n"); + for (i = 0; i < UCHAR_MAX + 1; i++) + if (i != *__collate_substitute_table[i]) + printf("\t'%c' --> \"%s\"\n", i, + __collate_substitute_table[i]); + printf("Chain priority table:\n"); + for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++) + printf("\t\"%s\" : %d %d\n", p2->str, p2->prim, p2->sec); + printf("Char priority table:\n"); + for (i = 0; i < UCHAR_MAX + 1; i++) + printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim, + __collate_char_pri_table[i].sec); +} +#endif |
