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53e1e5c6 | 1 | /*\r |
2 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
3 | This program and the accompanying materials are licensed and made available\r | |
4 | under the terms and conditions of the BSD License that accompanies this\r | |
5 | distribution. The full text of the license may be found at\r | |
6 | http://opensource.org/licenses/bsd-license.\r | |
7 | \r | |
8 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
9 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
2aa62f2b | 10 | \r |
2aa62f2b | 11 | * Copyright (c) 1990, 1993\r |
12 | * The Regents of the University of California. All rights reserved.\r | |
13 | *\r | |
14 | * This code is derived from software contributed to Berkeley by\r | |
15 | * Chris Torek.\r | |
16 | *\r | |
17 | * Redistribution and use in source and binary forms, with or without\r | |
18 | * modification, are permitted provided that the following conditions\r | |
19 | * are met:\r | |
20 | * 1. Redistributions of source code must retain the above copyright\r | |
21 | * notice, this list of conditions and the following disclaimer.\r | |
22 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
23 | * notice, this list of conditions and the following disclaimer in the\r | |
24 | * documentation and/or other materials provided with the distribution.\r | |
25 | * 3. Neither the name of the University nor the names of its contributors\r | |
26 | * may be used to endorse or promote products derived from this software\r | |
27 | * without specific prior written permission.\r | |
28 | *\r | |
29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
39 | * SUCH DAMAGE.\r | |
53e1e5c6 | 40 | \r |
41 | NetBSD: wbuf.c,v 1.13 2003/08/07 16:43:35 agc Exp\r | |
42 | wbuf.c 8.1 (Berkeley) 6/4/93\r | |
43 | */\r | |
2aa62f2b | 44 | #include <LibConfig.h>\r |
45 | #include <sys/EfiCdefs.h>\r | |
2aa62f2b | 46 | \r |
47 | #include <assert.h>\r | |
48 | #include <errno.h>\r | |
49 | #include <stdio.h>\r | |
50 | #include "reentrant.h"\r | |
51 | #include "local.h"\r | |
52 | \r | |
53 | /*\r | |
54 | * Write the given character into the (probably full) buffer for\r | |
55 | * the given file. Flush the buffer out if it is or becomes full,\r | |
56 | * or if c=='\n' and the file is line buffered.\r | |
57 | */\r | |
58 | int\r | |
59 | __swbuf(int c, FILE *fp)\r | |
60 | {\r | |
61 | int n;\r | |
62 | \r | |
63 | //_DIAGASSERT(fp != NULL);\r | |
53e1e5c6 | 64 | if(fp == NULL) {\r |
65 | errno = EINVAL;\r | |
66 | return (EOF);\r | |
67 | }\r | |
2aa62f2b | 68 | \r |
69 | _SET_ORIENTATION(fp, -1);\r | |
70 | \r | |
71 | /*\r | |
72 | * In case we cannot write, or longjmp takes us out early,\r | |
73 | * make sure _w is 0 (if fully- or un-buffered) or -_bf._size\r | |
74 | * (if line buffered) so that we will get called again.\r | |
75 | * If we did not do this, a sufficient number of putc()\r | |
76 | * calls might wrap _w from negative to positive.\r | |
77 | */\r | |
78 | fp->_w = fp->_lbfsize;\r | |
79 | if (cantwrite(fp)) {\r | |
80 | errno = EBADF;\r | |
81 | return (EOF);\r | |
82 | }\r | |
83 | c = (unsigned char)c;\r | |
84 | \r | |
85 | /*\r | |
86 | * If it is completely full, flush it out. Then, in any case,\r | |
87 | * stuff c into the buffer. If this causes the buffer to fill\r | |
88 | * completely, or if c is '\n' and the file is line buffered,\r | |
89 | * flush it (perhaps a second time). The second flush will always\r | |
90 | * happen on unbuffered streams, where _bf._size==1; fflush()\r | |
91 | * guarantees that putc() will always call wbuf() by setting _w\r | |
92 | * to 0, so we need not do anything else.\r | |
93 | */\r | |
94 | n = (int)(fp->_p - fp->_bf._base);\r | |
95 | if (n >= fp->_bf._size) {\r | |
96 | if (fflush(fp))\r | |
97 | return (EOF);\r | |
98 | n = 0;\r | |
99 | }\r | |
100 | fp->_w--;\r | |
101 | *fp->_p++ = (unsigned char)c;\r | |
102 | if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))\r | |
103 | if (fflush(fp))\r | |
104 | return (EOF);\r | |
105 | return (c);\r | |
106 | }\r |