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annotate packages/language/c/libc/current/src/stdio/common/setvbuf.cxx @ 66:bf00f99aec69 ecos-sw-2000-02-02
Merge from eCos master repository on 2000-02-02-19:16:44-GMT
| author | jlarmour |
|---|---|
| date | Wed, 02 Feb 2000 19:57:02 +0000 |
| parents | c38311975d4f |
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| rev | line source |
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| 0 | 1 //=========================================================================== |
| 2 // | |
| 3 // setvbuf.cxx | |
| 4 // | |
| 5 // Implementation of C library buffering setup as per ANSI 7.9.5.6 | |
| 6 // | |
| 7 //=========================================================================== | |
| 8 //####COPYRIGHTBEGIN#### | |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Red Hat eCos Public License |
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12 // Version 1.1 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://www.redhat.com/ |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Configurable Operating System, |
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22 // released September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Red Hat. |
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25 // Portions created by Red Hat are |
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. |
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27 // All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
| 0 | 30 //####COPYRIGHTEND#### |
| 31 //=========================================================================== | |
| 32 //#####DESCRIPTIONBEGIN#### | |
| 33 // | |
| 34 // Author(s): jlarmour | |
| 2 | 35 // Contributors: jlarmour |
| 0 | 36 // Date: 1998-02-13 |
| 37 // Purpose: | |
| 38 // Description: | |
| 39 // Usage: | |
| 40 // | |
| 41 //####DESCRIPTIONEND#### | |
| 42 // | |
| 43 //=========================================================================== | |
| 44 | |
| 45 // CONFIGURATION | |
| 46 | |
| 47 #include <pkgconf/libc.h> // Configuration header | |
| 48 | |
| 49 | |
| 50 // Include the C library? And do we want the stdio stuff? | |
| 51 #if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) | |
| 52 | |
| 53 // INCLUDES | |
| 54 | |
| 55 #include <cyg/infra/cyg_type.h> // Common project-wide type definitions | |
| 56 #include <stddef.h> // NULL and size_t from compiler | |
| 57 #include <errno.h> // Error codes | |
| 58 #include <stdio.h> // header for setvbuf() | |
| 59 #include "clibincl/stream.hxx" // C libray streams | |
| 60 #include "clibincl/stdiosupp.hxx" // support for stdio | |
| 61 | |
| 62 | |
| 63 // EXPORTED SYMBOLS | |
| 64 | |
| 65 externC int | |
| 66 setvbuf( FILE *, char *, int, size_t ) CYGPRI_LIBC_WEAK_ALIAS("_setvbuf"); | |
| 67 | |
| 68 | |
| 69 // FUNCTIONS | |
| 70 | |
| 71 | |
| 72 externC int | |
| 73 _setvbuf( FILE *stream, char *buf, int mode, size_t size ) | |
| 74 { | |
| 75 #ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO | |
| 76 | |
| 77 Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; | |
| 78 Cyg_ErrNo err; | |
| 79 | |
| 80 #ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS | |
| 81 if ( !real_stream->lock_me() ) { | |
| 82 errno = EBADF; | |
| 83 return EBADF; | |
| 84 } // if | |
| 85 #endif | |
| 86 | |
| 87 err = real_stream->io_buf.set_buffer( (cyg_ucount32) size, | |
| 88 (cyg_uint8 *) buf ); | |
| 89 if (!err) { | |
| 90 switch (mode) { | |
| 91 case _IONBF: | |
| 92 CYG_ASSERT( (size == 0) && (buf == NULL), | |
| 93 "No buffering wanted but size/address specified!" ); | |
| 94 real_stream->flags.buffering = false; | |
| 95 real_stream->flags.line_buffering = false; | |
| 96 break; | |
| 97 case _IOLBF: | |
| 98 real_stream->flags.buffering = true; | |
| 99 real_stream->flags.line_buffering = true; | |
| 100 break; | |
| 101 case _IOFBF: | |
| 102 real_stream->flags.buffering = true; | |
| 103 real_stream->flags.line_buffering = false; | |
| 104 break; | |
| 105 default: | |
| 106 err = EINVAL; | |
| 107 break; | |
| 108 } // switch | |
| 109 } // if | |
| 110 | |
| 111 #ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS | |
| 112 real_stream->unlock_me(); | |
| 113 #endif | |
| 114 | |
| 115 if (err) { | |
| 116 errno = err; | |
| 117 return err; | |
| 118 } // if | |
| 119 | |
| 120 return 0; | |
| 121 | |
| 122 #else // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO | |
| 123 | |
| 124 errno = ENOSUPP; | |
| 125 return ENOSUPP; | |
| 126 | |
| 127 #endif // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO | |
| 128 | |
| 129 } // _setvbuf() | |
| 130 | |
| 131 #endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) | |
| 132 | |
| 133 // EOF setvbuf.cxx |