1 /*- 2 * Copyright 2016 Netflix, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <efi.h> 30 #include <efilib.h> 31 32 /* 33 * CHAR16 related functions moved from loader. 34 * Perhaps we should move those to libstand afterall, but they are 35 * needed only by UEFI. 36 */ 37 38 int 39 wcscmp(CHAR16 *a, CHAR16 *b) 40 { 41 42 while (*a && *b && *a == *b) { 43 a++; 44 b++; 45 } 46 return *a - *b; 47 } 48 49 /* 50 * cpy8to16 copies a traditional C string into a CHAR16 string and 51 * 0 terminates it. len is the size of *dst in bytes. 52 */ 53 void 54 cpy8to16(const char *src, CHAR16 *dst, size_t len) 55 { 56 len <<= 1; /* Assume CHAR16 is 2 bytes */ 57 while (len > 0 && *src) { 58 *dst++ = *src++; 59 len--; 60 } 61 *dst++ = (CHAR16)0; 62 } 63 64 void 65 cpy16to8(const CHAR16 *src, char *dst, size_t len) 66 { 67 size_t i; 68 69 for (i = 0; i < len && src[i]; i++) 70 dst[i] = (char)src[i]; 71 if (i < len) 72 dst[i] = '\0'; 73 } 74