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38 #ifndef GMX_FILEIO_FUTIL_H
39 #define GMX_FILEIO_FUTIL_H
42 #include "../legacyheaders/typedefs.h"
51 /* Native windows uses backslash path separators.
52 * Cygwin and everybody else in the world use slash.
54 #include "../utility/gmx_header_config.h"
55 #ifdef GMX_NATIVE_WINDOWS
56 #define DIR_SEPARATOR '\\'
58 #define DIR_SEPARATOR '/'
61 /* Now get the maximum path size. */
63 # define GMX_PATH_MAX PATH_MAX
64 #elif defined MAX_PATH
65 # define GMX_PATH_MAX MAX_PATH
67 # define GMX_PATH_MAX 4096
70 typedef gmx_int64_t gmx_off_t;
72 void no_buffers(void);
73 /* Turn off buffering of files (which is default) for debugging purposes */
75 gmx_bool gmx_fexist(const char *fname);
76 /* Return TRUE when fname exists, FALSE otherwise */
78 gmx_bool gmx_fexist_master(const char *fname, t_commrec *cr);
79 /* Return TRUE when fname exists, FALSE otherwise, bcast from master to others */
81 gmx_bool gmx_eof(FILE *fp);
82 /* Return TRUE on end-of-file, FALSE otherwise */
84 gmx_bool is_pipe(FILE *fp);
85 /* Check whether the file (opened by gmx_ffopen) is a pipe */
87 /* Make a backup of file if necessary.
88 Return false if there was a problem.
90 gmx_bool make_backup(const char * file);
92 FILE *gmx_ffopen(const char *file, const char *mode);
93 /* Return a valid file pointer when successful, exits otherwise
94 * If the file is in compressed format, open a pipe which uncompresses
95 * the file! Therefore, files must be closed with gmx_ffclose (see below)
98 int gmx_ffclose(FILE *fp);
99 /* Close files or pipes */
102 void frewind(FILE *fp);
103 /* Does not rewind pipes, but does so for normal files */
105 #define rewind frewind
108 int gmx_fseek(FILE *stream, gmx_off_t offset, int whence);
109 /* OS-independent fseek. 64-bit when available */
111 gmx_off_t gmx_ftell(FILE *stream);
112 /* OS-independent fseek. 64-bit when available. */
115 gmx_bool is_pipe(FILE *fp);
117 char *gmxlibfn(const char *file);
118 /* allocates and returns a string with the full file name for a library file */
120 FILE *libopen(const char *file);
121 /* Open a library file for reading. This looks in the current directory
122 * first, and then in the library directory. If the file is not found,
123 * it terminates with a fatal_error
126 /* Opaque data type to list directories */
127 typedef struct gmx_directory *
130 /* Open a directory for reading. The first argument should be a pointer
131 * to a declared gmx_directory_t variable. Returns 0 on success.
134 gmx_directory_open(gmx_directory_t *p_gmxdir, const char *dirname);
137 /* Given an initialized gmx_directory_t, if there are more files in
138 * the directory this routine returns 0 and write the next name
139 * into the USER-PROVIDED buffer name. The last argument is the max
140 * number of characters that will be written. Just as strncpy, the
141 * string will NOT be terminated it it is longer than maxlength_name.
144 gmx_directory_nextfile(gmx_directory_t gmxdir, char *name, int maxlength_name);
146 /* Release all data for a directory structure */
148 gmx_directory_close(gmx_directory_t gmxdir);
151 char *low_gmxlibfn(const char *file, gmx_bool bAddCWD, gmx_bool bFatal);
153 FILE *low_libopen(const char *file, gmx_bool bFatal);
154 /* The same as the above, but does not terminate if (!bFatal) */
156 /* Create unique name for temp file (wrapper around mkstemp).
157 * Buf should be at least 7 bytes long
159 void gmx_tmpnam(char *buf);
161 /* truncte the file to the specified length */
162 int gmx_truncatefile(char *path, gmx_off_t length);
164 /* rename/move the file (atomically, if the OS makes that available) oldname
166 int gmx_file_rename(const char *oldname, const char *newname);
168 /* copy the file (data only) oldname to newname. if copy_if_empty==FALSE,
169 the file won't be copied if it's empty.*/
170 int gmx_file_copy(const char *oldname, const char *newname, gmx_bool copy_if_empty);
172 /* do an fsync() on an open file pointer.
173 Only use this during checkpointing! */
174 int gmx_fsync(FILE *fp);
176 void gmx_chdir(const char *directory);
177 void gmx_getcwd(char *buffer, size_t size);
183 #endif /* GMX_FILEIO_FUTIL_H */