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 #include <efi.h> 28 #include <efilib.h> 29 30 /* 31 * CHAR16 related functions moved from loader. 32 * Perhaps we should move those to libsa afterall, but they are 33 * needed only by UEFI. 34 */ 35 36 int 37 wcscmp(CHAR16 *a, CHAR16 *b) 38 { 39 40 while (*a && *b && *a == *b) { 41 a++; 42 b++; 43 } 44 return *a - *b; 45 } 46 47 /* 48 * cpy8to16 copies a traditional C string into a CHAR16 string and 49 * 0 terminates it. len is the size of *dst in bytes. 50 */ 51 void 52 cpy8to16(const char *src, CHAR16 *dst, size_t len) 53 { 54 len <<= 1; /* Assume CHAR16 is 2 bytes */ 55 while (len > 0 && *src) { 56 *dst++ = *src++; 57 len--; 58 } 59 *dst++ = (CHAR16)0; 60 } 61 62 void 63 cpy16to8(const CHAR16 *src, char *dst, size_t len) 64 { 65 size_t i; 66 67 for (i = 0; i < len && src[i]; i++) 68 dst[i] = (char)src[i]; 69 if (i < len) 70 dst[i] = '\0'; 71 } 72