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2aa62f2b | 1 | /** @file\r |
2 | Small standard I/O/seek/close functions.\r | |
3 | These maintain the `known seek offset' for seek optimisation.\r | |
4 | \r | |
53e1e5c6 | 5 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r |
2aa62f2b | 6 | This program and the accompanying materials are licensed and made available\r |
7 | under the terms and conditions of the BSD License that accompanies this\r | |
8 | distribution. The full text of the license may be found at\r | |
53e1e5c6 | 9 | http://opensource.org/licenses/bsd-license.\r |
2aa62f2b | 10 | \r |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | Copyright (c) 1990, 1993\r | |
15 | The Regents of the University of California. All rights reserved.\r | |
16 | \r | |
17 | This code is derived from software contributed to Berkeley by\r | |
18 | Chris Torek.\r | |
19 | \r | |
20 | Redistribution and use in source and binary forms, with or without\r | |
21 | modification, are permitted provided that the following conditions\r | |
22 | are met:\r | |
23 | - Redistributions of source code must retain the above copyright\r | |
24 | notice, this list of conditions and the following disclaimer.\r | |
25 | - Redistributions in binary form must reproduce the above copyright\r | |
26 | notice, this list of conditions and the following disclaimer in the\r | |
27 | documentation and/or other materials provided with the distribution.\r | |
28 | - Neither the name of the University nor the names of its contributors\r | |
29 | may be used to endorse or promote products derived from this software\r | |
30 | without specific prior written permission.\r | |
31 | \r | |
32 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"\r | |
33 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
34 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
35 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE\r | |
36 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r | |
37 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r | |
38 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r | |
39 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r | |
40 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r | |
41 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r | |
42 | POSSIBILITY OF SUCH DAMAGE.\r | |
43 | \r | |
44 | NetBSD: stdio.c,v 1.13 2003/08/07 16:43:33 agc Exp\r | |
45 | stdio.c 8.1 (Berkeley) 6/4/93\r | |
46 | **/\r | |
47 | #include <LibConfig.h>\r | |
48 | \r | |
49 | #include "namespace.h"\r | |
50 | \r | |
51 | #include <assert.h>\r | |
52 | #include <errno.h>\r | |
53 | #include <fcntl.h>\r | |
54 | #include <stdio.h>\r | |
55 | #include <sys/EfiSysCall.h>\r | |
56 | \r | |
57 | #include "reentrant.h"\r | |
58 | #include "local.h"\r | |
59 | \r | |
60 | int\r | |
61 | __sread(void *cookie, char *buf, int n)\r | |
62 | {\r | |
63 | FILE *fp = cookie;\r | |
64 | int ret;\r | |
65 | \r | |
66 | _DIAGASSERT(fp != NULL);\r | |
67 | _DIAGASSERT(buf != NULL);\r | |
53e1e5c6 | 68 | if(fp == NULL) {\r |
69 | errno = EINVAL;\r | |
70 | return (EOF);\r | |
71 | }\r | |
2aa62f2b | 72 | \r |
73 | ret = (int)read(fp->_file, buf, (size_t)n);\r | |
74 | /* if the read succeeded, update the current offset */\r | |
75 | if (ret >= 0)\r | |
76 | fp->_offset += ret;\r | |
77 | else\r | |
78 | fp->_flags &= ~__SOFF; /* paranoia */\r | |
79 | return (ret);\r | |
80 | }\r | |
81 | \r | |
82 | int\r | |
83 | __swrite(void *cookie, char const *buf, int n)\r | |
84 | {\r | |
85 | FILE *fp = cookie;\r | |
86 | \r | |
87 | _DIAGASSERT(cookie != NULL);\r | |
88 | _DIAGASSERT(buf != NULL);\r | |
53e1e5c6 | 89 | if(fp == NULL) {\r |
90 | errno = EINVAL;\r | |
91 | return (EOF);\r | |
92 | }\r | |
2aa62f2b | 93 | \r |
94 | if (fp->_flags & __SAPP)\r | |
95 | (void) lseek(fp->_file, (off_t)0, SEEK_END);\r | |
96 | fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */\r | |
97 | return (int)(write(fp->_file, (char *)buf, (size_t)n));\r | |
98 | }\r | |
99 | \r | |
100 | fpos_t\r | |
101 | __sseek(void *cookie, fpos_t offset, int whence)\r | |
102 | {\r | |
103 | FILE *fp = cookie;\r | |
104 | off_t ret;\r | |
105 | \r | |
106 | _DIAGASSERT(fp != NULL);\r | |
53e1e5c6 | 107 | if(fp == NULL) {\r |
108 | errno = EINVAL;\r | |
109 | return (EOF);\r | |
110 | }\r | |
2aa62f2b | 111 | \r |
112 | ret = lseek(fp->_file, (off_t)offset, whence);\r | |
113 | if (ret == -1L)\r | |
114 | fp->_flags &= ~__SOFF;\r | |
115 | else {\r | |
116 | fp->_flags |= __SOFF;\r | |
117 | fp->_offset = ret;\r | |
118 | }\r | |
119 | return (ret);\r | |
120 | }\r | |
121 | \r | |
122 | int\r | |
123 | __sclose(void *cookie)\r | |
124 | {\r | |
125 | \r | |
126 | _DIAGASSERT(cookie != NULL);\r | |
53e1e5c6 | 127 | if(cookie == NULL) {\r |
128 | errno = EINVAL;\r | |
129 | return (EOF);\r | |
130 | }\r | |
2aa62f2b | 131 | \r |
132 | return (close(((FILE *)cookie)->_file));\r | |
133 | }\r |