lib/libc/locale/ctypeio.c

   1 /* $NetBSD: ctypeio.c,v 1.9 2009/01/11 02:46:28 christos Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997 Christos Zoulas.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 #if defined(LIBC_SCCS) && !defined(lint)
  29 __RCSID("$NetBSD: ctypeio.c,v 1.9 2009/01/11 02:46:28 christos Exp $");
  30 #endif /* LIBC_SCCS and not lint */
  31
  32 #include <sys/types.h>
  33 #include <assert.h>
  34 #define _CTYPE_PRIVATE
  35 #include <ctype.h>
  36 #include <errno.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41
  42 #include "bsdctype.h"
  43 #include "ctypeio.h"
  44
  45 int
  46 __loadctype(const char * __restrict path, _BSDCTypeLocale ** __restrict pdata)
  47 {
  48         FILE *fp;
  49         char id[sizeof(_CTYPE_ID) - 1];
  50         uint32_t i, len;
  51         char *ptr;
  52         uint8_t *new_ctype;
  53         int16_t *new_tolower, *new_toupper;
  54         _BSDCTypeLocale *data;
  55
  56         _DIAGASSERT(path != NULL);
  57         _DIAGASSERT(pdata != NULL);
  58
  59         fp = fopen(path, "r");
  60         if (fp == NULL)
  61                 return ENOENT;
  62
  63         if (fread(id, sizeof(id), 1, fp) != 1 ||
  64             memcmp(id, _CTYPE_ID, sizeof(id)) != 0)
  65                 goto bad0;
  66
  67         if (fread(&i, sizeof(uint32_t), 1, fp) != 1 ||
  68             (i = ntohl(i)) != _CTYPE_REV)
  69                 goto bad0;
  70
  71         if (fread(&len, sizeof(uint32_t), 1, fp) != 1 ||
  72             (len = ntohl(len)) != _CTYPE_NUM_CHARS)
  73                 goto bad0;
  74
  75         ptr = malloc(sizeof(*data) + ((sizeof(uint8_t) +
  76             sizeof(int16_t) + sizeof(int16_t)) * (len + 1)));
  77         if (ptr == NULL)
  78                 return ENOMEM;
  79
  80         data = (_BSDCTypeLocale *)(void *)ptr;
  81         ptr += sizeof(*data);
  82
  83         (new_ctype = (void *)ptr)[0] = (uint8_t)0;
  84         ptr += sizeof(uint8_t);
  85         if (fread((void *)ptr, sizeof(uint8_t), len, fp) != len)
  86                 goto bad1;
  87         ptr += sizeof(uint8_t) * len;
  88
  89         (new_toupper = (void *)ptr)[0] = (int16_t)EOF;
  90         ptr += sizeof(int16_t);
  91         if (fread((void *)ptr, sizeof(int16_t), len, fp) != len)
  92                 goto bad1;
  93         ptr += sizeof(int16_t) * len;
  94
  95         (new_tolower = (void *)ptr)[0] = (int16_t)EOF;
  96         ptr += sizeof(int16_t);
  97         if (fread((void *)ptr, sizeof(int16_t), len, fp) != len)
  98                 goto bad1;
  99
 100 #if BYTE_ORDER == LITTLE_ENDIAN
 101         for (i = 1; i <= len; i++) {
 102                 new_toupper[i] = ntohs(new_toupper[i]);
 103                 new_tolower[i] = ntohs(new_tolower[i]);
 104         }
 105 #endif
 106
 107         fclose(fp);
 108
 109         data->ctype_tab = (const unsigned char *)new_ctype;
 110         data->toupper_tab = (const short *)new_toupper;
 111         data->tolower_tab = (const short *)new_tolower;
 112
 113         *pdata = data;
 114
 115                 return 0;
 116
 117 bad1:
 118         free(data);
 119 bad0:
 120         return EFTYPE;
 121 }