freebsd-skq/lib/libc/locale/collate.c
deischen 1635c221b7 Remove _THREAD_SAFE and make libc thread-safe by default by
adding (weak definitions to) stubs for some of the pthread
functions.  If the threads library is linked in, the real
pthread functions will pulled in.

Use the following convention for system calls wrapped by the
threads library:
	__sys_foo - actual system call
	_foo - weak definition to __sys_foo
	foo - weak definition to __sys_foo

Change all libc uses of system calls wrapped by the threads
library from foo to _foo.  In order to define the prototypes
for _foo(), we introduce namespace.h and un-namespace.h
(suggested by bde).  All files that need to reference these
system calls, should include namespace.h before any standard
includes, then include un-namespace.h after the standard
includes and before any local includes.  <db.h> is an exception
and shouldn't be included in between namespace.h and
un-namespace.h  namespace.h will define foo to _foo, and
un-namespace.h will undefine foo.

Try to eliminate some of the recursive calls to MT-safe
functions in libc/stdio in preparation for adding a mutex
to FILE.  We have recursive mutexes, but would like to avoid
using them if possible.

Remove uneeded includes of <errno.h> from a few files.

Add $FreeBSD$ to a few files in order to pass commitprep.

Approved by:	-arch
2001-01-24 13:01:12 +00:00

215 lines
5.6 KiB
C

/*-
* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
* at Electronni Visti IA, Kiev, Ukraine.
* All rights reserved.
*
* 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.
*
* $FreeBSD$
*/
#include "namespace.h"
#include <rune.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"
int __collate_load_error = 1;
int __collate_substitute_nontrivial;
char __collate_version[STR_LEN];
u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN];
struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1];
struct __collate_st_chain_pri __collate_chain_pri_table[TABLE_SIZE];
#define FREAD(a, b, c, d) \
do { \
if (fread(a, b, c, d) != c) { \
fclose(d); \
return -1; \
} \
} while(0)
void __collate_err(int ex, const char *f) __dead2;
int
__collate_load_tables(encoding)
char *encoding;
{
char buf[PATH_MAX];
FILE *fp;
int i, save_load_error;
save_load_error = __collate_load_error;
__collate_load_error = 1;
if (!encoding) {
__collate_load_error = save_load_error;
return -1;
}
if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX"))
return 0;
if (!_PathLocale) {
__collate_load_error = save_load_error;
return -1;
}
/* 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) {
__collate_load_error = save_load_error;
return -1;
}
FREAD(__collate_version, sizeof(__collate_version), 1, fp);
if (strcmp(__collate_version, COLLATE_VERSION) != 0) {
fclose(fp);
return -1;
}
FREAD(__collate_substitute_table, sizeof(__collate_substitute_table),
1, fp);
FREAD(__collate_char_pri_table, sizeof(__collate_char_pri_table), 1,
fp);
FREAD(__collate_chain_pri_table, sizeof(__collate_chain_pri_table), 1,
fp);
fclose(fp);
__collate_load_error = 0;
__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;
}
}
return 0;
}
u_char *
__collate_substitute(s)
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, __FUNCTION__);
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, __FUNCTION__);
}
strcpy(dest_str + len, __collate_substitute_table[*s++]);
len = nlen;
}
return dest_str;
}
void
__collate_lookup(t, len, prim, sec)
const u_char *t;
int *len, *prim, *sec;
{
struct __collate_st_chain_pri *p2;
*len = 1;
*prim = *sec = 0;
for(p2 = __collate_chain_pri_table; p2->str[0]; p2++) {
if(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(s)
u_char *s;
{
u_char *t = strdup(s);
if (t == NULL)
__collate_err(EX_OSERR, __FUNCTION__);
return t;
}
void
__collate_err(int ex, const char *f)
{
extern char *__progname; /* Program name, from crt0. */
const char *s;
int serrno = errno;
s = __progname;
_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]; p2++)
printf("\t\"%s\" : %d %d\n\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