contrib/less/ifile.c

14  * It is actually a pointer to an ifile structure,
26 struct ifile {
27 	struct ifile *h_next;		/* Links for command line list */
28 	struct ifile *h_prev;
33 	char h_opened;			/* Has this ifile been opened? */
41 #define int_ifile(h)	((struct ifile *)(h))
47 static struct ifile anchor = { &anchor, &anchor, NULL, NULL, 0, 0, '\0',
53 	register struct ifile *p;
61  * Link an ifile into the ifile list.
65 	struct ifile *p;
66 	struct ifile *prev;
87  * Unlink an ifile from the ifile list.
91 	struct ifile *p;
100  * Allocate a new ifile structure and stick a filename in it.
103  * Return a pointer to the new ifile structure.
105 	static struct ifile *
108 	struct ifile *prev;
110 	register struct ifile *p;
115 	p = (struct ifile *) ecalloc(1, sizeof(struct ifile));
126  * Delete an existing ifile structure.
132 	register struct ifile *p;
137 	 * If the ifile we're deleting is the currently open ifile,
150  * Get the ifile after a given one in the list.
156 	register struct ifile *p;
165  * Get the ifile before a given one in the list.
171 	register struct ifile *p;
180  * Return a different ifile from the given one.
183 getoff_ifile(ifile)
184 	IFILE ifile;
188 	if ((newifile = prev_ifile(ifile)) != NULL_IFILE)
190 	if ((newifile = next_ifile(ifile)) != NULL_IFILE)
205  * Find an ifile structure, given a filename.
207 	static struct ifile *
211 	register struct ifile *p;
220  * Get the ifile associated with a filename.
222  * insert the new ifile after "prev" in the list.
229 	register struct ifile *p;
237  * Get the filename associated with a ifile.
240 get_filename(ifile)
241 	IFILE ifile;
243 	if (ifile == NULL)
245 	return (int_ifile(ifile)->h_filename);
249  * Get the index of the file associated with a ifile.
252 get_index(ifile)
253 	IFILE ifile;
255 	return (int_ifile(ifile)->h_index);
262 store_pos(ifile, scrpos)
263 	IFILE ifile;
266 	int_ifile(ifile)->h_scrpos = *scrpos;
274 get_pos(ifile, scrpos)
275 	IFILE ifile;
278 	*scrpos = int_ifile(ifile)->h_scrpos;
282  * Mark the ifile as "opened".
285 set_open(ifile)
286 	IFILE ifile;
288 	int_ifile(ifile)->h_opened = 1;
292  * Return whether the ifile has been opened previously.
295 opened(ifile)
296 	IFILE ifile;
298 	return (int_ifile(ifile)->h_opened);
302 hold_ifile(ifile, incr)
303 	IFILE ifile;
306 	int_ifile(ifile)->h_hold += incr;
310 held_ifile(ifile)
311 	IFILE ifile;
313 	return (int_ifile(ifile)->h_hold);
317 get_filestate(ifile)
318 	IFILE ifile;
320 	return (int_ifile(ifile)->h_filestate);
324 set_filestate(ifile, filestate)
325 	IFILE ifile;
328 	int_ifile(ifile)->h_filestate = filestate;
335 	register struct ifile *p;