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2aa62f2b | 1 | /** @file\r |
2 | Copying Functions for <string.h>.\r | |
3 | \r | |
53e1e5c6 | 4 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r |
2aa62f2b | 5 | This program and the accompanying materials are licensed and made available under\r |
6 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
7 | The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php.\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | **/\r | |
2aa62f2b | 13 | #include <Uefi.h>\r |
14 | #include <Library/BaseLib.h>\r | |
15 | #include <Library/BaseMemoryLib.h>\r | |
16 | \r | |
17 | #include <LibConfig.h>\r | |
18 | \r | |
19 | #include <stdlib.h>\r | |
20 | #include <string.h>\r | |
21 | \r | |
53e1e5c6 | 22 | /** Do not define memcpy for IPF+GCC builds.\r |
23 | For IPF, using a GCC compiler, the memcpy function is converted to\r | |
24 | CopyMem by objcpy during build.\r | |
25 | **/\r | |
26 | #if !(defined(MDE_CPU_IPF) && defined(__GNUC__))\r | |
2aa62f2b | 27 | /** The memcpy function copies n characters from the object pointed to by s2\r |
28 | into the object pointed to by s1.\r | |
29 | \r | |
30 | The implementation is reentrant and handles the case where s2 overlaps s1.\r | |
31 | \r | |
32 | @return The memcpy function returns the value of s1.\r | |
33 | **/\r | |
34 | void *\r | |
35 | memcpy(void * __restrict s1, const void * __restrict s2, size_t n)\r | |
36 | {\r | |
37 | return CopyMem( s1, s2, n);\r | |
38 | }\r | |
53e1e5c6 | 39 | #endif /* !(defined(MDE_CPU_IPF) && defined(__GCC)) */\r |
2aa62f2b | 40 | \r |
41 | /** The memmove function copies n characters from the object pointed to by s2\r | |
42 | into the object pointed to by s1. Copying takes place as if the n\r | |
43 | characters from the object pointed to by s2 are first copied into a\r | |
44 | temporary array of n characters that does not overlap the objects pointed\r | |
45 | to by s1 and s2, and then the n characters from the temporary array are\r | |
46 | copied into the object pointed to by s1.\r | |
47 | \r | |
48 | This is a version of memcpy that is guaranteed to work when s1 and s2\r | |
49 | overlap. Since our implementation of memcpy already handles overlap,\r | |
50 | memmove can be identical to memcpy.\r | |
51 | \r | |
52 | @return The memmove function returns the value of s1.\r | |
53 | **/\r | |
54 | void *\r | |
55 | memmove(void *s1, const void *s2, size_t n)\r | |
56 | {\r | |
57 | return CopyMem( s1, s2, n);\r | |
58 | }\r | |
59 | \r | |
60 | /** The strcpy function copies the string pointed to by s2 (including the\r | |
61 | terminating null character) into the array pointed to by s1. If copying\r | |
62 | takes place between objects that overlap, the behavior is undefined.\r | |
63 | \r | |
64 | @return The strcpy function returns the value of s1.\r | |
65 | **/\r | |
66 | char *\r | |
67 | strcpy(char * __restrict s1, const char * __restrict s2)\r | |
68 | {\r | |
69 | //char *s1ret = s1;\r | |
70 | \r | |
71 | //while ( *s1++ = *s2++) /* Empty Body */;\r | |
72 | //return(s1ret);\r | |
73 | return AsciiStrCpy( s1, s2);\r | |
74 | }\r | |
75 | \r | |
76 | /** The strncpy function copies not more than n characters (characters that\r | |
77 | follow a null character are not copied) from the array pointed to by s2 to\r | |
78 | the array pointed to by s1. If copying takes place between objects that\r | |
79 | overlap, the behavior is undefined.\r | |
80 | \r | |
81 | If the array pointed to by s2 is a string that is shorter than n\r | |
82 | characters, null characters are appended to the copy in the array pointed\r | |
83 | to by s1, until n characters in all have been written.\r | |
84 | \r | |
85 | @return The strncpy function returns the value of s1.\r | |
86 | **/\r | |
87 | char *strncpy(char * __restrict s1, const char * __restrict s2, size_t n)\r | |
88 | {\r | |
89 | return AsciiStrnCpy( s1, s2, n);\r | |
90 | //char *dest = s1;\r | |
91 | \r | |
92 | //while(n != 0) {\r | |
93 | // --n;\r | |
94 | // if((*dest++ = *s2++) == '\0') break;\r | |
95 | //}\r | |
96 | //while(n != 0) {\r | |
97 | // *dest++ = '\0';\r | |
98 | // --n;\r | |
99 | //}\r | |
100 | //return (s1);\r | |
101 | }\r | |
102 | \r | |
103 | /** The strncpyX function copies not more than n-1 characters (characters that\r | |
104 | follow a null character are not copied) from the array pointed to by s2 to\r | |
105 | the array pointed to by s1. Array s1 is guaranteed to be NULL terminated.\r | |
106 | If copying takes place between objects that overlap,\r | |
107 | the behavior is undefined.\r | |
108 | \r | |
109 | strncpyX exists because normal strncpy does not indicate if the copy was\r | |
110 | terminated because of exhausting the buffer or reaching the end of s2.\r | |
111 | \r | |
112 | @return The strncpyX function returns 0 if the copy operation was\r | |
113 | terminated because it reached the end of s1. Otherwise,\r | |
114 | a non-zero value is returned indicating how many characters\r | |
115 | remain in s1.\r | |
116 | **/\r | |
117 | int strncpyX(char * __restrict s1, const char * __restrict s2, size_t n)\r | |
118 | {\r | |
119 | int NumLeft;\r | |
120 | \r | |
121 | for( ; n != 0; --n) {\r | |
122 | if((*s1++ = *s2++) == '\0') break;\r | |
123 | }\r | |
124 | NumLeft = (int)n;\r | |
125 | \r | |
126 | for( --s1; n != 0; --n) {\r | |
127 | *s1++ = '\0';\r | |
128 | }\r | |
129 | \r | |
130 | return NumLeft; // Zero if we ran out of buffer ( strlen(s1) < strlen(s2) )\r | |
131 | }\r | |
132 | \r | |
133 | /** NetBSD Compatibility Function strdup creates a duplicate copy of a string. **/\r | |
134 | char *\r | |
135 | strdup(const char *str)\r | |
136 | {\r | |
137 | size_t len;\r | |
138 | char *copy;\r | |
139 | \r | |
140 | len = strlen(str) + 1;\r | |
141 | if ((copy = malloc(len)) == NULL)\r | |
142 | return (NULL);\r | |
143 | memcpy(copy, str, len);\r | |
144 | return (copy);\r | |
145 | }\r |