1 | /* $NetBSD: hcreate.c,v 1.2 2001/02/19 21:26:04 ross Exp $ */ |
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2 | |
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3 | /* |
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4 | * Copyright (c) 2001 Christopher G. Demetriou |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. The name of the author may not be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>> |
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30 | */ |
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31 | |
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32 | /* |
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33 | * hcreate() / hsearch() / hdestroy() |
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34 | * |
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35 | * SysV/XPG4 hash table functions. |
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36 | * |
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37 | * Implementation done based on NetBSD manual page and Solaris manual page, |
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38 | * plus my own personal experience about how they're supposed to work. |
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39 | * |
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40 | * I tried to look at Knuth (as cited by the Solaris manual page), but |
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41 | * nobody had a copy in the office, so... |
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42 | */ |
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43 | |
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44 | #include <sys/cdefs.h> |
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45 | #if 0 |
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46 | #if defined(LIBC_SCCS) && !defined(lint) |
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47 | __RCSID("$NetBSD: hcreate.c,v 1.2 2001/02/19 21:26:04 ross Exp $"); |
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48 | #endif /* LIBC_SCCS and not lint */ |
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49 | #endif |
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50 | |
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51 | #include <sys/types.h> |
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52 | #include <errno.h> |
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53 | #include <search.h> |
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54 | #include <stdlib.h> |
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55 | #include <string.h> |
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56 | |
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57 | static struct hsearch_data htab; |
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58 | |
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59 | int |
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60 | hcreate (size_t nel) |
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61 | { |
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62 | return hcreate_r (nel, &htab); |
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63 | } |
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64 | |
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65 | void |
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66 | hdestroy (void) |
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67 | { |
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68 | hdestroy_r (&htab); |
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69 | } |
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70 | |
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71 | ENTRY * |
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72 | hsearch (ENTRY item, |
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73 | ACTION action) |
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74 | { |
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75 | ENTRY *retval; |
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76 | |
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77 | hsearch_r (item, action, &retval, &htab); |
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78 | |
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79 | return retval; |
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80 | } |
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