XRootD
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XrdSysPlatform.cc
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1/******************************************************************************/
2/* */
3/* X r d S y s P l a t f o r m . c c */
4/* */
5/* (c) 2006 by the Board of Trustees of the Leland Stanford, Jr., University */
6/* Produced by Andrew Hanushevsky for Stanford University under contract */
7/* DE-AC02-76-SFO0515 with the Department of Energy */
8/* */
9/* This file is part of the XRootD software suite. */
10/* */
11/* XRootD is free software: you can redistribute it and/or modify it under */
12/* the terms of the GNU Lesser General Public License as published by the */
13/* Free Software Foundation, either version 3 of the License, or (at your */
14/* option) any later version. */
15/* */
16/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
17/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
18/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
19/* License for more details. */
20/* */
21/* You should have received a copy of the GNU Lesser General Public License */
22/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
23/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
24/* */
25/* The copyright holder's institutional names and contributor's names may not */
26/* be used to endorse or promote products derived from this software without */
27/* specific prior written permission of the institution or contributor. */
28/******************************************************************************/
29
30#include <climits>
31#include <cstdio>
32#include <cstring>
33#ifndef WIN32
34#include <unistd.h>
35#include <netinet/in.h>
36#endif
37#include <sys/types.h>
38
39#if defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__) || \
40 defined(__IEEE_LITTLE_ENDIAN) || \
41 (defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN)
42#if !defined(__GNUC__) || defined(__APPLE__)
43extern "C"
44{
45unsigned long long Swap_n2hll(unsigned long long x)
46{
47 unsigned long long ret_val;
48 *( (unsigned int *)(&ret_val) + 1) = ntohl(*( (unsigned int *)(&x)));
49 *(((unsigned int *)(&ret_val))) = ntohl(*(((unsigned int *)(&x))+1));
50 return ret_val;
51}
52}
53#endif
54
55#endif
56
57#ifndef HAVE_STRLCPY
58extern "C"
59{
60size_t strlcpy(char *dst, const char *src, size_t sz)
61{
62 size_t slen = strlen(src);
63 size_t tlen =sz-1;
64
65 if (slen <= tlen) strcpy(dst, src);
66 else if (tlen > 0) {strncpy(dst, src, tlen); dst[tlen] = '\0';}
67 else if (tlen == 0) dst[0] = '\0';
68
69 return slen;
70}
71}
72#endif
73
74
75namespace XrdSys {
76
78{
79#ifndef IOV_MAX
80#ifdef _SC_IOV_MAX
81 static int IOV_MAX = []() {
82 int sc_iov_max = sysconf(_SC_IOV_MAX);
83 return sc_iov_max > 0 ? sc_iov_max : 1024;
84 }();
85#else
86#define IOV_MAX 1024
87#endif
88#endif
89 return IOV_MAX;
90}
91
92}
#define IOV_MAX
size_t strlcpy(char *dst, const char *src, size_t sz)
int getIovMax()