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550 | 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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE |
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28 | * DESCRIBE IT HERE! |
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29 | * |
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30 | ****************************************************************************/ |
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31 | |||
32 | |||
33 | #include "variety.h" |
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34 | #include |
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35 | #include |
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36 | |||
37 | #include "iomode.h" |
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38 | #include "fileacc.h" |
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39 | #include "rtcheck.h" |
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40 | #include "rtdata.h" |
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41 | #include "seterrno.h" |
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42 | #include "qwrite.h" |
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43 | #include "liballoc.h" |
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44 | |||
45 | |||
46 | /* |
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47 | Use caution when setting the file pointer in a multithreaded |
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48 | application. You must synchronize access to shared resources. For |
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49 | example, an application whose threads share a file handle, update the |
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50 | file pointer, and read from the file must protect this sequence by |
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51 | using a critical section object or a mutex object. |
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52 | */ |
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53 | |||
54 | typedef struct |
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55 | { DWORD attr; |
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56 | DWORD flags; |
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57 | DWORD cr_time; |
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58 | DWORD cr_date; |
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59 | DWORD acc_time; |
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60 | DWORD acc_date; |
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61 | DWORD mod_time; |
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62 | DWORD mod_date; |
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63 | DWORD size; |
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64 | DWORD size_high; |
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65 | } FILEINFO; |
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66 | |||
67 | typedef struct |
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68 | { |
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69 | char *name; |
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70 | unsigned int offset; |
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71 | }__file_handle; |
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72 | |||
73 | int _stdcall get_fileinfo(const char *name,FILEINFO* pinfo); |
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74 | int _stdcall write_file(const char *name,const void *buff,unsigned offset,unsigned count,unsigned *writes); |
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75 | char* getfullpath(const char* path); |
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76 | |||
77 | int __qwrite( int handle, const void *buffer, unsigned len ) |
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78 | { |
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79 | int atomic; |
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80 | __file_handle *fh; |
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81 | unsigned len_written; |
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82 | |||
83 | |||
84 | __handle_check( handle, -1 ); |
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85 | |||
86 | fh = (__file_handle*) __getOSHandle( handle ); |
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87 | |||
88 | atomic = 0; |
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89 | if( __GetIOMode( handle ) & _APPEND ) |
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90 | { |
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91 | FILEINFO info; |
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92 | |||
93 | _AccessFileH( handle ); |
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94 | atomic = 1; |
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95 | get_fileinfo(fh->name,&info); |
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96 | fh->offset = info.size; |
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97 | }; |
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98 | |||
99 | if(write_file(fh->name,buffer,fh->offset,len,&len_written)) |
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100 | { |
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101 | if ( len_written == 0) |
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102 | { |
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103 | if( atomic == 1 ) |
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104 | _ReleaseFileH( handle ); |
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105 | |||
106 | return (-1); |
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107 | }; |
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108 | }; |
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109 | |||
110 | fh->offset+=len_written; |
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111 | |||
112 | |||
113 | if( atomic == 1 ) |
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114 | { |
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115 | _ReleaseFileH( handle ); |
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116 | } |
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117 | return( len_written ); |
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118 | } |
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119 | |||
120 | int write_once(const char *name, void *buffer, unsigned len) |
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121 | { char *path; |
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122 | unsigned count; |
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123 | |||
124 | path= getfullpath(name); |
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125 | write_file(path,buffer,0,len,&count); |
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126 | lib_free(path); |
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127 | return count; |
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128 | |||
129 | } |