1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/base/libc.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,164 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/*
1.9 + * libc.c
1.10 + *
1.11 + * This file contains our wrappers/reimplementations for "standard"
1.12 + * libc functions. Things like "memcpy." We add to this as we need
1.13 + * it. Oh, and let's keep it in alphabetical order, should it ever
1.14 + * get large. Most string/character stuff should be in utf8.c, not
1.15 + * here. This file (and maybe utf8.c) should be the only ones in
1.16 + * NSS to include files with angle brackets.
1.17 + */
1.18 +
1.19 +#ifndef BASE_H
1.20 +#include "base.h"
1.21 +#endif /* BASE_H */
1.22 +
1.23 +#include <string.h> /* memcpy, memset */
1.24 +
1.25 +/*
1.26 + * nsslibc_memcpy
1.27 + * nsslibc_memset
1.28 + * nsslibc_offsetof
1.29 + * nsslibc_memequal
1.30 + */
1.31 +
1.32 +/*
1.33 + * nsslibc_memcpy
1.34 + *
1.35 + * Errors:
1.36 + * NSS_ERROR_INVALID_POINTER
1.37 + *
1.38 + * Return value:
1.39 + * NULL on error
1.40 + * The destination pointer on success
1.41 + */
1.42 +
1.43 +NSS_IMPLEMENT void *
1.44 +nsslibc_memcpy
1.45 +(
1.46 + void *dest,
1.47 + const void *source,
1.48 + PRUint32 n
1.49 +)
1.50 +{
1.51 +#ifdef NSSDEBUG
1.52 + if( ((void *)NULL == dest) || ((const void *)NULL == source) ) {
1.53 + nss_SetError(NSS_ERROR_INVALID_POINTER);
1.54 + return (void *)NULL;
1.55 + }
1.56 +#endif /* NSSDEBUG */
1.57 +
1.58 + return memcpy(dest, source, (size_t)n);
1.59 +}
1.60 +
1.61 +/*
1.62 + * nsslibc_memset
1.63 + *
1.64 + * Errors:
1.65 + * NSS_ERROR_INVALID_POINTER
1.66 + *
1.67 + * Return value:
1.68 + * NULL on error
1.69 + * The destination pointer on success
1.70 + */
1.71 +
1.72 +NSS_IMPLEMENT void *
1.73 +nsslibc_memset
1.74 +(
1.75 + void *dest,
1.76 + PRUint8 byte,
1.77 + PRUint32 n
1.78 +)
1.79 +{
1.80 +#ifdef NSSDEBUG
1.81 + if( ((void *)NULL == dest) ) {
1.82 + nss_SetError(NSS_ERROR_INVALID_POINTER);
1.83 + return (void *)NULL;
1.84 + }
1.85 +#endif /* NSSDEBUG */
1.86 +
1.87 + return memset(dest, (int)byte, (size_t)n);
1.88 +}
1.89 +
1.90 +/*
1.91 + * nsslibc_memequal
1.92 + *
1.93 + * Errors:
1.94 + * NSS_ERROR_INVALID_POINTER
1.95 + *
1.96 + * Return value:
1.97 + * PR_TRUE if they match
1.98 + * PR_FALSE if they don't
1.99 + * PR_FALSE upon error
1.100 + */
1.101 +
1.102 +NSS_IMPLEMENT PRBool
1.103 +nsslibc_memequal
1.104 +(
1.105 + const void *a,
1.106 + const void *b,
1.107 + PRUint32 len,
1.108 + PRStatus *statusOpt
1.109 +)
1.110 +{
1.111 +#ifdef NSSDEBUG
1.112 + if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
1.113 + nss_SetError(NSS_ERROR_INVALID_POINTER);
1.114 + if( (PRStatus *)NULL != statusOpt ) {
1.115 + *statusOpt = PR_FAILURE;
1.116 + }
1.117 + return PR_FALSE;
1.118 + }
1.119 +#endif /* NSSDEBUG */
1.120 +
1.121 + if( (PRStatus *)NULL != statusOpt ) {
1.122 + *statusOpt = PR_SUCCESS;
1.123 + }
1.124 +
1.125 + if( 0 == memcmp(a, b, len) ) {
1.126 + return PR_TRUE;
1.127 + } else {
1.128 + return PR_FALSE;
1.129 + }
1.130 +}
1.131 +
1.132 +/*
1.133 + * nsslibc_memcmp
1.134 + */
1.135 +
1.136 +NSS_IMPLEMENT PRInt32
1.137 +nsslibc_memcmp
1.138 +(
1.139 + const void *a,
1.140 + const void *b,
1.141 + PRUint32 len,
1.142 + PRStatus *statusOpt
1.143 +)
1.144 +{
1.145 + int v;
1.146 +
1.147 +#ifdef NSSDEBUG
1.148 + if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
1.149 + nss_SetError(NSS_ERROR_INVALID_POINTER);
1.150 + if( (PRStatus *)NULL != statusOpt ) {
1.151 + *statusOpt = PR_FAILURE;
1.152 + }
1.153 + return -2;
1.154 + }
1.155 +#endif /* NSSDEBUG */
1.156 +
1.157 + if( (PRStatus *)NULL != statusOpt ) {
1.158 + *statusOpt = PR_SUCCESS;
1.159 + }
1.160 +
1.161 + v = memcmp(a, b, len);
1.162 + return (PRInt32)v;
1.163 +}
1.164 +
1.165 +/*
1.166 + * offsetof is a preprocessor definition
1.167 + */
