locale.subproj/frune.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * This code is derived from software contributed to Berkeley by
  27  * Paul Borman at Krystal Technologies.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 #include <limits.h>
  60 #include <rune.h>
  61 #include <stddef.h>
  62 #include <stdio.h>
  63
  64 long
  65 fgetrune(fp)
  66         FILE *fp;
  67 {
  68         rune_t  r;
  69         int c, len;
  70         char buf[MB_LEN_MAX];
  71         char const *result;
  72
  73         len = 0;
  74         do {
  75                 if ((c = getc(fp)) == EOF) {
  76                         if (len)
  77                                 break;
  78                         return (EOF);
  79                 }
  80                 buf[len++] = c;
  81
  82                 if ((r = sgetrune(buf, len, &result)) != _INVALID_RUNE)
  83                         return (r);
  84         } while (result == buf && len < MB_LEN_MAX);
  85
  86         while (--len > 0)
  87                 ungetc(buf[len], fp);
  88         return (_INVALID_RUNE);
  89 }
  90
  91 int
  92 fungetrune(r, fp)
  93         rune_t r;
  94         FILE* fp;
  95 {
  96         int len;
  97         char buf[MB_LEN_MAX];
  98
  99         len = sputrune(r, buf, MB_LEN_MAX, 0);
 100         while (len-- > 0)
 101                 if (ungetc(buf[len], fp) == EOF)
 102                         return (EOF);
 103         return (0);
 104 }
 105
 106 int
 107 fputrune(r, fp)
 108         rune_t r;
 109         FILE *fp;
 110 {
 111         int i, len;
 112         char buf[MB_LEN_MAX];
 113
 114         len = sputrune(r, buf, MB_LEN_MAX, 0);
 115
 116         for (i = 0; i < len; ++i)
 117                 if (putc(buf[i], fp) == EOF)
 118                         return (EOF);
 119
 120         return (0);
 121 }