1 /** @file 2 Comparison Functions for <string.h>. 3 4 Copyright (c) 2010, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials are licensed and made available under 6 the terms and conditions of the BSD License that accompanies this distribution. 7 The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 **/ 13 #include <Uefi.h> 14 #include <Library/BaseLib.h> 15 #include <Library/BaseMemoryLib.h> 16 17 #include <LibConfig.h> 18 19 #include <ctype.h> 20 #include <string.h> 21 22 /** The memcmp function compares the first n characters of the object pointed 23 to by s1 to the first n characters of the object pointed to by s2. 24 25 @return The memcmp function returns an integer greater than, equal to, or 26 less than zero, accordingly as the object pointed to by s1 is 27 greater than, equal to, or less than the object pointed to by s2. 28 **/ 29 int memcmp(const void *s1, const void *s2, size_t n) 30 { 31 return (int)CompareMem( s1, s2, n); 32 } 33 34 /** The strcmp function compares the string pointed to by s1 to the string 35 pointed to by s2. 36 37 @return The strcmp function returns an integer greater than, equal to, or 38 less than zero, accordingly as the string pointed to by s1 is 39 greater than, equal to, or less than the string pointed to by s2. 40 **/ 41 int strcmp(const char *s1, const char *s2) 42 { 43 return (int)AsciiStrCmp( s1, s2); 44 } 45 46 /** The strcoll function compares the string pointed to by s1 to the string 47 pointed to by s2, both interpreted as appropriate to the LC_COLLATE 48 category of the current locale. 49 50 @return The strcoll function returns an integer greater than, equal to, 51 or less than zero, accordingly as the string pointed to by s1 is 52 greater than, equal to, or less than the string pointed to by s2 53 when both are interpreted as appropriate to the current locale. 54 **/ 55 int strcoll(const char *s1, const char *s2) 56 { 57 /* LC_COLLATE is unimplemented, hence always "C" */ 58 return (strcmp(s1, s2)); 59 } 60 61 /** The strncmp function compares not more than n characters (characters that 62 follow a null character are not compared) from the array pointed to by s1 63 to the array pointed to by s2. 64 65 @return The strncmp function returns an integer greater than, equal to, 66 or less than zero, accordingly as the possibly null-terminated 67 array pointed to by s1 is greater than, equal to, or less than 68 the possibly null-terminated array pointed to by s2. 69 **/ 70 int strncmp(const char *s1, const char *s2, size_t n) 71 { 72 return (int)AsciiStrnCmp( s1, s2, n); 73 } 74 75 /** The strxfrm function transforms the string pointed to by Src and places the 76 resulting string into the array pointed to by Dest. The transformation is 77 such that if the strcmp function is applied to two transformed strings, it 78 returns a value greater than, equal to, or less than zero, corresponding to 79 the result of the strcoll function applied to the same two original 80 strings. No more than Len characters are placed into the resulting array 81 pointed to by Dest, including the terminating null character. If Len is zero, 82 Dest is permitted to be a null pointer. If copying takes place between 83 objects that overlap, the behavior is undefined. 84 85 @return The strxfrm function returns the length of the transformed string 86 (not including the terminating null character). If the value 87 returned is Len or more, the contents of the array pointed to by Dest 88 are indeterminate. 89 **/ 90 size_t strxfrm(char * __restrict Dest, const char * __restrict Src, size_t Len) 91 { 92 size_t srclen, copysize; 93 94 /* 95 * Since locales are unimplemented, this is just a copy. 96 */ 97 srclen = strlen(Src); 98 if (Len != 0) { 99 copysize = srclen < Len ? srclen : Len - 1; 100 (void)memcpy(Dest, Src, copysize); 101 Dest[copysize] = 0; 102 } 103 return (srclen); 104 } 105 106 /** Case agnostic string comparison for NetBSD compatibility. **/ 107 int 108 strcasecmp(const char *s1, const char *s2) 109 { 110 return (int)AsciiStriCmp( s1, s2); 111 } 112
