Update UD main archive 960805
[kopensolaris-gnu/glibc.git] / nss / getXXbyYY.c
1 /* Copyright (C) 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB.  If
16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA.  */
18
19 #include "../nss/nsswitch.h"
20
21 /*******************************************************************\
22 |* Here we assume several symbols to be defined:                   *|
23 |*                                                                 *|
24 |* LOOKUP_TYPE   - the return type of the function                 *|
25 |*                                                                 *|
26 |* FUNCTION_NAME - name of the non-reentrant function              *|
27 |*                                                                 *|
28 |* DATABASE_NAME - name of the database the function accesses      *|
29 |*                 (e.g., host, services, ...)                     *|
30 |*                                                                 *|
31 |* ADD_PARAMS    - additional parameter, can vary in number        *|
32 |*                                                                 *|
33 |* ADD_VARIABLES - names of additional parameter                   *|
34 |*                                                                 *|
35 |* BUFLEN        - length of buffer allocated for the non          *|
36 |*                 reentrant version                               *|
37 |*                                                                 *|
38 |* Optionally the following vars can be defined:                   *|
39 |*                                                                 *|
40 |* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
41 |*                 the global `h_errno' variable.                  *|
42 |*                                                                 *|
43 \*******************************************************************/
44
45 /* To make the real sources a bit prettier.  */
46 #define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
47 #define APPEND_R(name) APPEND_R1 (name)
48 #define APPEND_R1(name) name##_r
49 #define INTERNAL(name) INTERNAL1 (name)
50 #define INTERNAL1(name) __##name
51
52 /* Sometimes we need to store error codes in the `h_errno' variable.  */
53 #ifdef NEED_H_ERRNO
54 # define H_ERRNO_PARM , int *h_errnop
55 # define H_ERRNO_VAR , &h_errno
56 #else
57 # define H_ERRNO_PARM
58 # define H_ERRNO_VAR
59 #endif
60
61
62 /* Prototype for reentrant version we use here.  */
63 extern LOOKUP_TYPE *INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *result,
64                                                char *buffer, int buflen
65                                                H_ERRNO_PARM);
66
67 LOOKUP_TYPE *
68 FUNCTION_NAME (ADD_PARAMS)
69 {
70   static LOOKUP_TYPE result;
71   static char buffer[BUFLEN];
72
73   return INTERNAL (REENTRANT_NAME) (ADD_VARIABLES, &result, buffer,
74                                     BUFLEN H_ERRNO_VAR);
75 }