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map.c revision 1.1.1.2 
      1 /*	$NetBSD: map.c,v 1.1.1.2 2017/01/28 20:46:55 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2004 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifdef HAVE_CONFIG_H
     37 #include <config.h>
     38 #endif
     39 #include "windlocl.h"
     40 
     41 #include <stdlib.h>
     42 
     43 #include "map_table.h"
     44 
     45 static int
     46 translation_cmp(const void *key, const void *data)
     47 {
     48     const struct translation *t1 = (const struct translation *)key;
     49     const struct translation *t2 = (const struct translation *)data;
     50 
     51     return t1->key - t2->key;
     52 }
     53 
     54 int
     55 _wind_stringprep_map(const uint32_t *in, size_t in_len,
     56 		     uint32_t *out, size_t *out_len,
     57 		     wind_profile_flags flags)
     58 {
     59     unsigned i;
     60     unsigned o = 0;
     61 
     62     for (i = 0; i < in_len; ++i) {
     63 	struct translation ts = {in[i], 0, 0, 0};
     64 	const struct translation *s;
     65 
     66 	s = (const struct translation *)
     67 	    bsearch(&ts, _wind_map_table, _wind_map_table_size,
     68 		    sizeof(_wind_map_table[0]),
     69 		    translation_cmp);
     70 	if (s != NULL && (s->flags & flags)) {
     71 	    unsigned j;
     72 
     73 	    for (j = 0; j < s->val_len; ++j) {
     74 		if (o >= *out_len)
     75 		    return WIND_ERR_OVERRUN;
     76 		out[o++] = _wind_map_table_val[s->val_offset + j];
     77 	    }
     78 	} else {
     79 	    if (o >= *out_len)
     80 		return WIND_ERR_OVERRUN;
     81 	    out[o++] = in[i];
     82 
     83 	}
     84     }
     85     *out_len = o;
     86     return 0;
     87 }
     88