2  * Copyright (C) 1984-2025  Mark Nudelman
20  * A mark is an ifile (input file) plus a position within the file.
22 struct mark   struct
28 	 * user explicitly requests the file (by name or mark).
33 	struct scrpos m_scrpos;  /* Position of the mark */  argument
38  * Each mark is identified by a lowercase or uppercase letter.
39  * The final one is lmark, for the "last mark"; addressed by the apostrophe.
45 static struct mark marks[NMARKS];
50  * Initialize a mark struct.
52 static void cmark(struct mark *m, IFILE ifile, POSITION pos, int ln)  in cmark()
64  * Initialize the mark table to show no marks are set.
86 static void mark_set_ifile(struct mark *m, IFILE ifile)  in mark_set_ifile()
95  * Populate the m_ifile member of a mark struct from m_filename.
97 static void mark_get_ifile(struct mark *m)  in mark_get_ifile()
105  * Return the user mark struct identified by a character.
107 static struct mark * getumark(char c)  in getumark()
119 	error("Invalid mark letter %c", &parg);  in getumark()
124  * Get the mark structure identified by a character.
125  * The mark struct may either be in the mark table (user mark)
128 static struct mark * getmark(char c)  in getmark()
130 	struct mark *m;  in getmark()
131 	static struct mark sm;  in getmark()
164 		 * The "last mark".  in getmark()
170 		 * Must be a user-defined mark.  in getmark()
177 			error("Mark not set", NULL_PARG);  in getmark()
186  * Is a mark letter invalid?
194  * Set a user-defined mark.
198 	struct mark *m;  in setmark()
215  * Clear a user-defined mark.
219 	struct mark *m;  in clrmark()
234  * Set lmark (the mark named by the apostrophe).
250  * Go to a mark.
254 	struct mark *m;  in gomark()
287  * Return the position associated with a given mark letter.
295 	struct mark *m;  in markpos()
303 		error("Mark not in current file", NULL_PARG);  in markpos()
310  * Return the mark associated with a given position, if any.
352 		struct mark *m = &marks[i];  in mark_check_ifile()
380 		struct mark *m = &marks[i];  in save_marks()
395  * Restore one mark from the history file.
399 	struct mark *m;  in restore_mark()