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359 | serge | 1 | /**************************************************************************** |
2 | * |
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3 | * Open Watcom Project |
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4 | * |
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5 | * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
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6 | * |
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7 | * ======================================================================== |
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8 | * |
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9 | * This file contains Original Code and/or Modifications of Original |
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10 | * Code as defined in and that are subject to the Sybase Open Watcom |
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11 | * Public License version 1.0 (the 'License'). You may not use this file |
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12 | * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
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13 | * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
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14 | * provided with the Original Code and Modifications, and is also |
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15 | * available at www.sybase.com/developer/opensource. |
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16 | * |
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17 | * The Original Code and all software distributed under the License are |
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18 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
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19 | * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
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20 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
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21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
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22 | * NON-INFRINGEMENT. Please see the License for the specific language |
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23 | * governing rights and limitations under the License. |
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24 | * |
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25 | * ======================================================================== |
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26 | * |
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27 | * Description: Platform independent fclose() implementation. |
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28 | * |
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29 | ****************************************************************************/ |
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30 | |||
31 | |||
32 | #include "variety.h" |
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33 | #include |
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34 | #include |
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35 | #include |
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36 | #include "liballoc.h" |
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37 | #include "mf.h" |
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38 | #include |
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39 | #include "fileacc.h" |
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40 | #include "tmpfname.h" |
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41 | #include "rtdata.h" |
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42 | #include "lseek.h" |
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43 | #include "streamio.h" |
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44 | #include "close.h" |
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45 | #include "flush.h" |
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46 | |||
47 | |||
48 | #ifndef __UNIX__ |
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49 | void (*__RmTmpFileFn)( FILE *fp ); |
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50 | #endif |
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51 | |||
52 | |||
53 | int __doclose( FILE *fp, int close_handle ) |
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54 | { |
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55 | int ret; |
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56 | |||
57 | if( fp->_flag == 0 ) { |
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58 | return( -1 ); /* file already closed */ |
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59 | } |
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60 | ret = 0; |
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61 | if( fp->_flag & _DIRTY ) { |
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62 | ret = __flush( fp ); |
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63 | } |
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64 | _AccessFile( fp ); |
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65 | /* |
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66 | * 02-nov-92 G.Turcotte Syncronize buffer pointer with the file pointer |
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67 | * IEEE Std 1003.1-1988 B.8.2.3.2 |
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68 | * 03-nov-03 B.Oldeman Inlined ftell; we already know the buffer isn't |
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69 | * dirty (because of the flush), so only a "get" applies |
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70 | */ |
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71 | if( fp->_cnt != 0 ) { /* if something in buffer */ |
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72 | __lseek( fileno( fp ), -fp->_cnt, SEEK_CUR ); |
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73 | } |
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74 | |||
75 | if( close_handle ) { |
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76 | #if defined( __UNIX__ ) || defined( __NETWARE__ ) |
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77 | // we don't get to implement the close function on these systems |
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78 | ret |= close( fileno( fp ) ); |
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79 | #else |
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80 | ret |= __close( fileno( fp ) ); |
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81 | #endif |
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82 | } |
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83 | if( fp->_flag & _BIGBUF ) { /* if we allocated the buffer */ |
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84 | lib_free( _FP_BASE(fp) ); |
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85 | _FP_BASE(fp) = NULL; |
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86 | } |
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87 | #ifndef __UNIX__ |
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88 | /* this never happens under UNIX */ |
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89 | if( fp->_flag & _TMPFIL ) { /* if this is a temporary file */ |
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90 | __RmTmpFileFn( fp ); |
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91 | } |
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92 | #endif |
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93 | _ReleaseFile( fp ); |
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94 | return( ret ); |
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95 | } |
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96 | |||
97 | int __shutdown_stream( FILE *fp, int close_handle ) |
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98 | { |
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99 | int ret; |
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100 | |||
101 | ret = __doclose( fp, close_handle ); |
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102 | __freefp( fp ); |
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103 | return( ret ); |
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104 | } |
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105 | |||
106 | _WCRTLINK int fclose( FILE *fp ) |
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107 | { |
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108 | __stream_link *link; |
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109 | |||
110 | _AccessIOB(); |
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111 | link = _RWD_ostream; |
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112 | for( ;; ) { |
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113 | if( link == NULL ) { |
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114 | _ReleaseIOB(); |
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115 | return( -1 ); /* file not open */ |
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116 | } |
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117 | if( link->stream == fp ) break; |
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118 | link = link->next; |
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119 | } |
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120 | _ReleaseIOB(); |
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121 | return( __shutdown_stream( fp, 1 ) ); |
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122 | } |