libs/ldap/include/ac/string.h

   1 /* Generic string.h */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2022 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #ifndef _AC_STRING_H
  18 #define _AC_STRING_H
  19
  20 #ifdef STDC_HEADERS
  21 #       include <string.h>
  22
  23 #else
  24 #       ifdef HAVE_STRING_H
  25 #               include <string.h>
  26 #       endif
  27 #       if defined(HAVE_STRINGS_H) && (!defined(HAVE_STRING_H) || defined(BOTH_STRINGS_H))
  28 #               include <strings.h>
  29 #       endif
  30
  31 #       ifdef HAVE_MEMORY_H
  32 #               include <memory.h>
  33 #       endif
  34
  35 #       ifndef HAVE_STRRCHR
  36 #               undef strchr
  37 #               define strchr index
  38 #               undef strrchr
  39 #               define strrchr rindex
  40 #       endif
  41
  42 #       ifndef HAVE_MEMCPY
  43 #               undef memcpy
  44 #               define memcpy(d, s, n)          ((void) bcopy ((s), (d), (n)))
  45 #               undef memmove
  46 #               define memmove(d, s, n)         ((void) bcopy ((s), (d), (n)))
  47 #       endif
  48 #endif
  49
  50 /* use ldap_pvt_strtok instead of strtok or strtok_r! */
  51 LDAP_F(char *) ldap_pvt_strtok LDAP_P(( char *str,
  52         const char *delim, char **pos ));
  53
  54 #ifndef HAVE_STRDUP
  55         /* strdup() is missing, declare our own version */
  56 #       undef strdup
  57 #       define strdup(s) ber_strdup(s)
  58 #elif !defined(_WIN32)
  59         /* some systems fail to declare strdup */
  60         /* Windows does not require this declaration */
  61         LDAP_LIBC_F(char *) (strdup)();
  62 #endif
  63
  64 /*
  65  * some systems fail to declare strcasecmp() and strncasecmp()
  66  * we need them declared so we can obtain pointers to them
  67  */
  68
  69 /* we don't want these declared for Windows or Mingw */
  70 #ifndef _WIN32
  71 int (strcasecmp)();
  72 int (strncasecmp)();
  73 #endif
  74
  75 #ifndef SAFEMEMCPY
  76 #       if defined( HAVE_MEMMOVE )
  77 #               define SAFEMEMCPY( d, s, n )    memmove((d), (s), (n))
  78 #       elif defined( HAVE_BCOPY )
  79 #               define SAFEMEMCPY( d, s, n )    bcopy((s), (d), (n))
  80 #       else
  81                 /* nothing left but memcpy() */
  82 #               define SAFEMEMCPY( d, s, n )    memcpy((d), (s), (n))
  83 #       endif
  84 #endif
  85
  86 #define AC_MEMCPY( d, s, n ) (SAFEMEMCPY((d),(s),(n)))
  87 #define AC_FMEMCPY( d, s, n ) do { \
  88                 if((n) == 1) *((char*)(d)) = *((char*)(s)); \
  89                 else AC_MEMCPY( (d), (s), (n) ); \
  90         } while(0)
  91
  92 #ifdef NEED_MEMCMP_REPLACEMENT
  93         int (lutil_memcmp)(const void *b1, const void *b2, size_t len);
  94 #define memcmp lutil_memcmp
  95 #endif
  96
  97 void *(lutil_memrchr)(const void *b, int c, size_t n);
  98 /* GNU extension (glibc >= 2.1.91), only declared when defined(_GNU_SOURCE) */
  99 #if defined(HAVE_MEMRCHR) && defined(_GNU_SOURCE)
 100 #define lutil_memrchr(b, c, n) memrchr(b, c, n)
 101 #endif /* ! HAVE_MEMRCHR */
 102
 103 #define STRLENOF(s)     (sizeof(s)-1)
 104
 105 #if defined( HAVE_NONPOSIX_STRERROR_R )
 106 #       define AC_STRERROR_R(e,b,l)             (strerror_r((e), (b), (l)))
 107 #elif defined( HAVE_STRERROR_R )
 108 #       define AC_STRERROR_R(e,b,l)             (strerror_r((e), (b), (l)) == 0 ? (b) : "Unknown error")
 109 #elif defined( HAVE_SYS_ERRLIST )
 110 #       define AC_STRERROR_R(e,b,l)             ((e) > -1 && (e) < sys_nerr \
 111                                                         ? sys_errlist[(e)] : "Unknown error" )
 112 #elif defined( HAVE_STRERROR )
 113 #       define AC_STRERROR_R(e,b,l)             (strerror(e))   /* NOTE: may be NULL */
 114 #else
 115 #       define AC_STRERROR_R(e,b,l)             ("Unknown error")
 116 #endif
 117
 118 #endif /* _AC_STRING_H */