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-rw-r--r--security/nss/lib/base/libc.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/security/nss/lib/base/libc.c b/security/nss/lib/base/libc.c
new file mode 100644
index 0000000000..7954a31610
--- /dev/null
+++ b/security/nss/lib/base/libc.c
@@ -0,0 +1,143 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * libc.c
+ *
+ * This file contains our wrappers/reimplementations for "standard"
+ * libc functions. Things like "memcpy." We add to this as we need
+ * it. Oh, and let's keep it in alphabetical order, should it ever
+ * get large. Most string/character stuff should be in utf8.c, not
+ * here. This file (and maybe utf8.c) should be the only ones in
+ * NSS to include files with angle brackets.
+ */
+
+#ifndef BASE_H
+#include "base.h"
+#endif /* BASE_H */
+
+#include <string.h> /* memcpy, memset */
+
+/*
+ * nsslibc_memcpy
+ * nsslibc_memset
+ * nsslibc_offsetof
+ * nsslibc_memequal
+ */
+
+/*
+ * nsslibc_memcpy
+ *
+ * Errors:
+ * NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ * NULL on error
+ * The destination pointer on success
+ */
+
+NSS_IMPLEMENT void *
+nsslibc_memcpy(void *dest, const void *source, PRUint32 n)
+{
+#ifdef NSSDEBUG
+ if (((void *)NULL == dest) || ((const void *)NULL == source)) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return (void *)NULL;
+ }
+#endif /* NSSDEBUG */
+
+ return memcpy(dest, source, (size_t)n);
+}
+
+/*
+ * nsslibc_memset
+ *
+ * Errors:
+ * NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ * NULL on error
+ * The destination pointer on success
+ */
+
+NSS_IMPLEMENT void *
+nsslibc_memset(void *dest, PRUint8 byte, PRUint32 n)
+{
+#ifdef NSSDEBUG
+ if (((void *)NULL == dest)) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return (void *)NULL;
+ }
+#endif /* NSSDEBUG */
+
+ return memset(dest, (int)byte, (size_t)n);
+}
+
+/*
+ * nsslibc_memequal
+ *
+ * Errors:
+ * NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ * PR_TRUE if they match
+ * PR_FALSE if they don't
+ * PR_FALSE upon error
+ */
+
+NSS_IMPLEMENT PRBool
+nsslibc_memequal(const void *a, const void *b, PRUint32 len,
+ PRStatus *statusOpt)
+{
+#ifdef NSSDEBUG
+ if ((((void *)NULL == a) || ((void *)NULL == b))) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return PR_FALSE;
+ }
+#endif /* NSSDEBUG */
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ if (0 == memcmp(a, b, len)) {
+ return PR_TRUE;
+ } else {
+ return PR_FALSE;
+ }
+}
+
+/*
+ * nsslibc_memcmp
+ */
+
+NSS_IMPLEMENT PRInt32
+nsslibc_memcmp(const void *a, const void *b, PRUint32 len, PRStatus *statusOpt)
+{
+ int v;
+
+#ifdef NSSDEBUG
+ if ((((void *)NULL == a) || ((void *)NULL == b))) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return -2;
+ }
+#endif /* NSSDEBUG */
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ v = memcmp(a, b, len);
+ return (PRInt32)v;
+}
+
+/*
+ * offsetof is a preprocessor definition
+ */