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38 #ifndef GMX_FILEIO_FUTIL_H
39 #define GMX_FILEIO_FUTIL_H
42 #include "../legacyheaders/typedefs.h"
43 #include "../legacyheaders/types/commrec.h"
52 /* Native windows uses backslash path separators.
53 * Cygwin and everybody else in the world use slash.
54 * When reading the PATH environment variable, Unix separates entries
55 * with colon, while windows uses semicolon.
57 #include "../utility/gmx_header_config.h"
58 #ifdef GMX_NATIVE_WINDOWS
59 #define DIR_SEPARATOR '\\'
60 #define PATH_SEPARATOR ";"
62 #define DIR_SEPARATOR '/'
63 #define PATH_SEPARATOR ":"
67 /* Now get the maximum path size. */
69 # define GMX_PATH_MAX PATH_MAX
70 #elif defined MAX_PATH
71 # define GMX_PATH_MAX MAX_PATH
73 # define GMX_PATH_MAX 4096
78 typedef off_t gmx_off_t;
79 # define SIZEOF_GMX_OFF_T SIZEOF_OFF_T
80 #elif defined HAVE__FSEEKI64
81 typedef __int64 gmx_off_t;
82 # define SIZEOF_GMX_OFF_T 8
84 /* Almost certainly 64 bits, and guaranteed to be available */
85 typedef gmx_large_int_t gmx_off_t;
86 # define SIZEOF_GMX_OFF_T SIZEOF_GMX_LARGE_INT
91 void no_buffers(void);
92 /* Turn off buffering of files (which is default) for debugging purposes */
94 gmx_bool gmx_fexist(const char *fname);
95 /* Return TRUE when fname exists, FALSE otherwise */
97 gmx_bool gmx_fexist_master(const char *fname, t_commrec *cr);
98 /* Return TRUE when fname exists, FALSE otherwise, bcast from master to others */
100 gmx_bool gmx_eof(FILE *fp);
101 /* Return TRUE on end-of-file, FALSE otherwise */
103 gmx_bool is_pipe(FILE *fp);
104 /* Check whether the file (opened by ffopen) is a pipe */
106 /* Make a backup of file if necessary.
107 Return false if there was a problem.
109 gmx_bool make_backup(const char * file);
111 FILE *ffopen(const char *file, const char *mode);
112 /* Return a valid file pointer when successful, exits otherwise
113 * If the file is in compressed format, open a pipe which uncompresses
114 * the file! Therefore, files must be closed with ffclose (see below)
117 int ffclose(FILE *fp);
118 /* Close files or pipes */
121 void frewind(FILE *fp);
122 /* Does not rewind pipes, but does so for normal files */
124 #define rewind frewind
127 int gmx_fseek(FILE *stream, gmx_off_t offset, int whence);
128 /* OS-independent fseek. 64-bit when available */
130 gmx_off_t gmx_ftell(FILE *stream);
131 /* OS-independent fseek. 64-bit when available. */
134 gmx_bool is_pipe(FILE *fp);
136 char *gmxlibfn(const char *file);
137 /* allocates and returns a string with the full file name for a library file */
139 FILE *libopen(const char *file);
140 /* Open a library file for reading. This looks in the current directory
141 * first, and then in the library directory. If the file is not found,
142 * it terminates with a fatal_error
145 /* Opaque data type to list directories */
146 typedef struct gmx_directory *
149 /* Open a directory for reading. The first argument should be a pointer
150 * to a declared gmx_directory_t variable. Returns 0 on success.
153 gmx_directory_open(gmx_directory_t *p_gmxdir, const char *dirname);
156 /* Given an initialized gmx_directory_t, if there are more files in
157 * the directory this routine returns 0 and write the next name
158 * into the USER-PROVIDED buffer name. The last argument is the max
159 * number of characters that will be written. Just as strncpy, the
160 * string will NOT be terminated it it is longer than maxlength_name.
163 gmx_directory_nextfile(gmx_directory_t gmxdir, char *name, int maxlength_name);
165 /* Release all data for a directory structure */
167 gmx_directory_close(gmx_directory_t gmxdir);
171 void get_libdir(char *libdir);
173 char *low_gmxlibfn(const char *file, gmx_bool bAddCWD, gmx_bool bFatal);
175 FILE *low_libopen(const char *file, gmx_bool bFatal);
176 /* The same as the above, but does not terminate if (!bFatal) */
178 /* Create unique name for temp file (wrapper around mkstemp).
179 * Buf should be at least 7 bytes long
181 void gmx_tmpnam(char *buf);
183 /* truncte the file to the specified length */
184 int gmx_truncatefile(char *path, gmx_off_t length);
186 /* rename/move the file (atomically, if the OS makes that available) oldname
188 int gmx_file_rename(const char *oldname, const char *newname);
190 /* copy the file (data only) oldname to newname. if copy_if_empty==FALSE,
191 the file won't be copied if it's empty.*/
192 int gmx_file_copy(const char *oldname, const char *newname, gmx_bool copy_if_empty);
194 /* do an fsync() on an open file pointer.
195 Only use this during checkpointing! */
196 int gmx_fsync(FILE *fp);
198 void gmx_chdir(const char *directory);
199 void gmx_getcwd(char *buffer, size_t size);
205 #endif /* GMX_FILEIO_FUTIL_H */