]>
Commit | Line | Data |
---|---|---|
2aa62f2b | 1 | /** @file\r |
2 | Copying Functions for <string.h>.\r | |
3 | \r | |
4 | Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r | |
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 | |
13 | //#include <sys/EfiCdefs.h>\r | |
14 | \r | |
15 | #include <Uefi.h>\r | |
16 | #include <Library/BaseLib.h>\r | |
17 | #include <Library/BaseMemoryLib.h>\r | |
18 | \r | |
19 | #include <LibConfig.h>\r | |
20 | \r | |
21 | #include <stdlib.h>\r | |
22 | #include <string.h>\r | |
23 | \r | |
24 | /** The memcpy function copies n characters from the object pointed to by s2\r | |
25 | into the object pointed to by s1.\r | |
26 | \r | |
27 | The implementation is reentrant and handles the case where s2 overlaps s1.\r | |
28 | \r | |
29 | @return The memcpy function returns the value of s1.\r | |
30 | **/\r | |
31 | void *\r | |
32 | memcpy(void * __restrict s1, const void * __restrict s2, size_t n)\r | |
33 | {\r | |
34 | return CopyMem( s1, s2, n);\r | |
35 | }\r | |
36 | \r | |
37 | /** The memmove function copies n characters from the object pointed to by s2\r | |
38 | into the object pointed to by s1. Copying takes place as if the n\r | |
39 | characters from the object pointed to by s2 are first copied into a\r | |
40 | temporary array of n characters that does not overlap the objects pointed\r | |
41 | to by s1 and s2, and then the n characters from the temporary array are\r | |
42 | copied into the object pointed to by s1.\r | |
43 | \r | |
44 | This is a version of memcpy that is guaranteed to work when s1 and s2\r | |
45 | overlap. Since our implementation of memcpy already handles overlap,\r | |
46 | memmove can be identical to memcpy.\r | |
47 | \r | |
48 | @return The memmove function returns the value of s1.\r | |
49 | **/\r | |
50 | void *\r | |
51 | memmove(void *s1, const void *s2, size_t n)\r | |
52 | {\r | |
53 | return CopyMem( s1, s2, n);\r | |
54 | }\r | |
55 | \r | |
56 | /** The strcpy function copies the string pointed to by s2 (including the\r | |
57 | terminating null character) into the array pointed to by s1. If copying\r | |
58 | takes place between objects that overlap, the behavior is undefined.\r | |
59 | \r | |
60 | @return The strcpy function returns the value of s1.\r | |
61 | **/\r | |
62 | char *\r | |
63 | strcpy(char * __restrict s1, const char * __restrict s2)\r | |
64 | {\r | |
65 | //char *s1ret = s1;\r | |
66 | \r | |
67 | //while ( *s1++ = *s2++) /* Empty Body */;\r | |
68 | //return(s1ret);\r | |
69 | return AsciiStrCpy( s1, s2);\r | |
70 | }\r | |
71 | \r | |
72 | /** The strncpy function copies not more than n characters (characters that\r | |
73 | follow a null character are not copied) from the array pointed to by s2 to\r | |
74 | the array pointed to by s1. If copying takes place between objects that\r | |
75 | overlap, the behavior is undefined.\r | |
76 | \r | |
77 | If the array pointed to by s2 is a string that is shorter than n\r | |
78 | characters, null characters are appended to the copy in the array pointed\r | |
79 | to by s1, until n characters in all have been written.\r | |
80 | \r | |
81 | @return The strncpy function returns the value of s1.\r | |
82 | **/\r | |
83 | char *strncpy(char * __restrict s1, const char * __restrict s2, size_t n)\r | |
84 | {\r | |
85 | return AsciiStrnCpy( s1, s2, n);\r | |
86 | //char *dest = s1;\r | |
87 | \r | |
88 | //while(n != 0) {\r | |
89 | // --n;\r | |
90 | // if((*dest++ = *s2++) == '\0') break;\r | |
91 | //}\r | |
92 | //while(n != 0) {\r | |
93 | // *dest++ = '\0';\r | |
94 | // --n;\r | |
95 | //}\r | |
96 | //return (s1);\r | |
97 | }\r | |
98 | \r | |
99 | /** The strncpyX function copies not more than n-1 characters (characters that\r | |
100 | follow a null character are not copied) from the array pointed to by s2 to\r | |
101 | the array pointed to by s1. Array s1 is guaranteed to be NULL terminated.\r | |
102 | If copying takes place between objects that overlap,\r | |
103 | the behavior is undefined.\r | |
104 | \r | |
105 | strncpyX exists because normal strncpy does not indicate if the copy was\r | |
106 | terminated because of exhausting the buffer or reaching the end of s2.\r | |
107 | \r | |
108 | @return The strncpyX function returns 0 if the copy operation was\r | |
109 | terminated because it reached the end of s1. Otherwise,\r | |
110 | a non-zero value is returned indicating how many characters\r | |
111 | remain in s1.\r | |
112 | **/\r | |
113 | int strncpyX(char * __restrict s1, const char * __restrict s2, size_t n)\r | |
114 | {\r | |
115 | int NumLeft;\r | |
116 | \r | |
117 | for( ; n != 0; --n) {\r | |
118 | if((*s1++ = *s2++) == '\0') break;\r | |
119 | }\r | |
120 | NumLeft = (int)n;\r | |
121 | \r | |
122 | for( --s1; n != 0; --n) {\r | |
123 | *s1++ = '\0';\r | |
124 | }\r | |
125 | \r | |
126 | return NumLeft; // Zero if we ran out of buffer ( strlen(s1) < strlen(s2) )\r | |
127 | }\r | |
128 | \r | |
129 | /** NetBSD Compatibility Function strdup creates a duplicate copy of a string. **/\r | |
130 | char *\r | |
131 | strdup(const char *str)\r | |
132 | {\r | |
133 | size_t len;\r | |
134 | char *copy;\r | |
135 | \r | |
136 | len = strlen(str) + 1;\r | |
137 | if ((copy = malloc(len)) == NULL)\r | |
138 | return (NULL);\r | |
139 | memcpy(copy, str, len);\r | |
140 | return (copy);\r | |
141 | }\r |