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Tue May 26 19:01:08 2015 UTC (9 years, 9 months ago) by amb
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Tue May 26 19:01:08 2015 UTC (9 years, 9 months ago) by amb
File MIME type: text/x-chdr
File size: 4450 byte(s)
When compiling with MINGW the pread() and pwrite() functions are not available. Fix a signed/unsigned assignment warning in the inline functions.
1 | /*************************************** |
2 | Header file for file function prototypes |
3 | |
4 | Part of the Routino routing software. |
5 | ******************/ /****************** |
6 | This file Copyright 2008-2015 Andrew M. Bishop |
7 | |
8 | This program is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU Affero General Public License as published by |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. |
12 | |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | GNU Affero General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU Affero General Public License |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
20 | ***************************************/ |
21 | |
22 | |
23 | #ifndef FILES_H |
24 | #define FILES_H /*+ To stop multiple inclusions. +*/ |
25 | |
26 | /* If your system does not have the pread() and pwrite() system calls then you |
27 | * will need to change this line to the value 0 so that seek() and |
28 | * read()/write() are used instead of pread()/pwrite(). */ |
29 | |
30 | #if defined(_MSC_VER) || defined(__MINGW32__) |
31 | #define HAVE_PREAD_PWRITE 0 |
32 | #else |
33 | #define HAVE_PREAD_PWRITE 1 |
34 | #endif |
35 | |
36 | #if defined(_MSC_VER) |
37 | #include <io.h> |
38 | #define read(fd,address,length) _read(fd,address,(unsigned int)(length)) |
39 | #define write(fd,address,length) _write(fd,address,(unsigned int)(length)) |
40 | #define lseek _lseeki64 |
41 | #else |
42 | #include <unistd.h> |
43 | #endif |
44 | |
45 | #include <sys/types.h> |
46 | |
47 | #include "logging.h" |
48 | |
49 | |
50 | /* Functions in files.c */ |
51 | |
52 | char *FileName(const char *dirname,const char *prefix, const char *name); |
53 | |
54 | void *MapFile(const char *filename); |
55 | void *MapFileWriteable(const char *filename); |
56 | |
57 | void *UnmapFile(const void *address); |
58 | |
59 | int SlimMapFile(const char *filename); |
60 | int SlimMapFileWriteable(const char *filename); |
61 | |
62 | int SlimUnmapFile(int fd); |
63 | |
64 | int OpenFileBufferedNew(const char *filename); |
65 | int OpenFileBufferedAppend(const char *filename); |
66 | |
67 | int ReOpenFileBuffered(const char *filename); |
68 | |
69 | int WriteFileBuffered(int fd,const void *address,size_t length); |
70 | int ReadFileBuffered(int fd,void *address,size_t length); |
71 | |
72 | int SeekFileBuffered(int fd,off_t position); |
73 | int SkipFileBuffered(int fd,off_t skip); |
74 | |
75 | int CloseFileBuffered(int fd); |
76 | |
77 | int OpenFile(const char *filename); |
78 | |
79 | void CloseFile(int fd); |
80 | |
81 | off_t SizeFile(const char *filename); |
82 | off_t SizeFileFD(int fd); |
83 | int ExistsFile(const char *filename); |
84 | |
85 | int DeleteFile(const char *filename); |
86 | |
87 | int RenameFile(const char *oldfilename,const char *newfilename); |
88 | |
89 | /* Functions in files.h */ |
90 | |
91 | static inline int SlimReplace(int fd,const void *address,size_t length,off_t position); |
92 | static inline int SlimFetch(int fd,void *address,size_t length,off_t position); |
93 | |
94 | |
95 | /* Inline the frequently called functions */ |
96 | |
97 | /*++++++++++++++++++++++++++++++++++++++ |
98 | Write data to a file that has been opened for slim mode access. |
99 | |
100 | int SlimReplace Returns 0 if OK or something else in case of an error. |
101 | |
102 | int fd The file descriptor to write to. |
103 | |
104 | const void *address The address of the data to be written. |
105 | |
106 | size_t length The length of data to write. |
107 | |
108 | off_t position The position in the file to seek to. |
109 | ++++++++++++++++++++++++++++++++++++++*/ |
110 | |
111 | static inline int SlimReplace(int fd,const void *address,size_t length,off_t position) |
112 | { |
113 | /* Seek and write the data */ |
114 | |
115 | #if HAVE_PREAD_PWRITE |
116 | |
117 | if(pwrite(fd,address,length,position)!=(ssize_t)length) |
118 | return(-1); |
119 | |
120 | #else |
121 | |
122 | if(lseek(fd,position,SEEK_SET)!=position) |
123 | return(-1); |
124 | |
125 | if(write(fd,address,length)!=(ssize_t)length) |
126 | return(-1); |
127 | |
128 | #endif |
129 | |
130 | return(0); |
131 | } |
132 | |
133 | |
134 | /*++++++++++++++++++++++++++++++++++++++ |
135 | Read data from a file that has been opened for slim mode access. |
136 | |
137 | int SlimFetch Returns 0 if OK or something else in case of an error. |
138 | |
139 | int fd The file descriptor to read from. |
140 | |
141 | void *address The address the data is to be read into. |
142 | |
143 | size_t length The length of data to read. |
144 | |
145 | off_t position The position in the file to seek to. |
146 | ++++++++++++++++++++++++++++++++++++++*/ |
147 | |
148 | static inline int SlimFetch(int fd,void *address,size_t length,off_t position) |
149 | { |
150 | /* Seek and read the data */ |
151 | |
152 | #if HAVE_PREAD_PWRITE |
153 | |
154 | if(pread(fd,address,length,position)!=(ssize_t)length) |
155 | return(-1); |
156 | |
157 | #else |
158 | |
159 | if(lseek(fd,position,SEEK_SET)!=position) |
160 | return(-1); |
161 | |
162 | if(read(fd,address,length)!=(ssize_t)length) |
163 | return(-1); |
164 | |
165 | #endif |
166 | |
167 | return(0); |
168 | } |
169 | |
170 | |
171 | #endif /* FILES_H */ |
Properties
Name | Value |
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cvs:description | A new header file for files.c functions and includes some inline functions. |