/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2000,2006 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
-
/******************************************************************************
NAME
#include <curses.priv.h>
-MODULE_ID("$Id: hardscroll.c,v 1.33 1999/02/27 20:01:29 tom Exp $")
+MODULE_ID("$Id: hardscroll.c,v 1.38 2006/12/30 22:19:34 tom Exp $")
#if defined(SCROLLDEBUG) || defined(HASHDEBUG)
# undef screen_lines
# define screen_lines MAXLINES
-int oldnums[MAXLINES];
+NCURSES_EXPORT_VAR(int)
+oldnums[MAXLINES];
# define OLDNUM(n) oldnums[n]
# define _tracef printf
# undef TR
/* OLDNUM(n) indicates which line will be shifted to the position n.
if OLDNUM(n) == _NEWINDEX, then the line n in new, not shifted from
somewhere. */
+NCURSES_EXPORT_VAR(int *)
+_nc_oldnums = 0; /* obsolete: keep for ABI compat */
+
# if USE_HASHMAP
-int *_nc_oldnums = 0;
-static int oldnums_allocated = 0;
-# define oldnums _nc_oldnums
+# define oldnums SP->_oldnum_list
# define OLDNUM(n) oldnums[n]
-# else /* !USE_HASHMAP */
+# else /* !USE_HASHMAP */
# define OLDNUM(n) newscr->_line[n].oldindex
-# endif /* !USE_HASHMAP */
+# endif /* !USE_HASHMAP */
-#endif /* defined(SCROLLDEBUG) || defined(HASHDEBUG) */
+#define OLDNUM_SIZE SP->_oldnum_size
+#endif /* defined(SCROLLDEBUG) || defined(HASHDEBUG) */
-void _nc_scroll_optimize(void)
+NCURSES_EXPORT(void)
+_nc_scroll_optimize(void)
/* scroll optimization to transform curscr to newscr */
{
int i;
#if !defined(SCROLLDEBUG) && !defined(HASHDEBUG)
#if USE_HASHMAP
/* get enough storage */
- if (oldnums_allocated < screen_lines)
- {
+ if (OLDNUM_SIZE < screen_lines) {
int *new_oldnums = typeRealloc(int, screen_lines, oldnums);
if (!new_oldnums)
return;
oldnums = new_oldnums;
- oldnums_allocated = screen_lines;
+ OLDNUM_SIZE = screen_lines;
}
/* calculate the indices */
_nc_hash_map();
#endif /* TRACE */
/* pass 1 - from top to bottom scrolling up */
- for (i = 0; i < screen_lines; )
- {
+ for (i = 0; i < screen_lines;) {
while (i < screen_lines && (OLDNUM(i) == _NEWINDEX || OLDNUM(i) <= i))
i++;
if (i >= screen_lines)
break;
- shift = OLDNUM(i) - i; /* shift > 0 */
+ shift = OLDNUM(i) - i; /* shift > 0 */
start = i;
i++;
- while (i < screen_lines && OLDNUM(i) != _NEWINDEX && OLDNUM(i) - i == shift)
+ while (i < screen_lines && OLDNUM(i) != _NEWINDEX && OLDNUM(i) - i
+ == shift)
i++;
- end = i-1 + shift;
+ end = i - 1 + shift;
TR(TRACE_UPDATE | TRACE_MOVE, ("scroll [%d, %d] by %d", start, end, shift));
#if !defined(SCROLLDEBUG) && !defined(HASHDEBUG)
- if (_nc_scrolln(shift, start, end, screen_lines - 1) == ERR)
- {
+ if (_nc_scrolln(shift, start, end, screen_lines - 1) == ERR) {
TR(TRACE_UPDATE | TRACE_MOVE, ("unable to scroll"));
continue;
}
}
/* pass 2 - from bottom to top scrolling down */
- for (i = screen_lines-1; i >= 0; )
- {
+ for (i = screen_lines - 1; i >= 0;) {
while (i >= 0 && (OLDNUM(i) == _NEWINDEX || OLDNUM(i) >= i))
i--;
if (i < 0)
break;
- shift = OLDNUM(i) - i; /* shift < 0 */
+ shift = OLDNUM(i) - i; /* shift < 0 */
end = i;
i--;
while (i >= 0 && OLDNUM(i) != _NEWINDEX && OLDNUM(i) - i == shift)
i--;
- start = i+1 - (-shift);
+ start = i + 1 - (-shift);
TR(TRACE_UPDATE | TRACE_MOVE, ("scroll [%d, %d] by %d", start, end, shift));
#if !defined(SCROLLDEBUG) && !defined(HASHDEBUG)
- if (_nc_scrolln(shift, start, end, screen_lines - 1) == ERR)
- {
+ if (_nc_scrolln(shift, start, end, screen_lines - 1) == ERR) {
TR(TRACE_UPDATE | TRACE_MOVE, ("unable to scroll"));
continue;
}
}
#if defined(TRACE) || defined(SCROLLDEBUG) || defined(HASHDEBUG)
-void _nc_linedump(void)
+NCURSES_EXPORT(void)
+_nc_linedump(void)
/* dump the state of the real and virtual oldnum fields */
{
- static size_t have;
- static char *buf;
-
- int n;
- size_t want = (screen_lines + 1) * 4;
+ int n;
+ char *buf = 0;
+ size_t want = (screen_lines + 1) * 4;
- if (have < want)
- buf = typeMalloc(char, have = want);
+ buf = typeMalloc(char, want);
(void) strcpy(buf, "virt");
for (n = 0; n < screen_lines; n++)
(void) sprintf(buf + strlen(buf), " %02d", OLDNUM(n));
TR(TRACE_UPDATE | TRACE_MOVE, (buf));
-#if NO_LEAKS
free(buf);
- have = 0;
-#endif
}
#endif /* defined(TRACE) || defined(SCROLLDEBUG) */
#ifdef SCROLLDEBUG
int
-main(int argc GCC_UNUSED, char *argv[] GCC_UNUSED)
+main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
- char line[BUFSIZ], *st;
+ char line[BUFSIZ], *st;
#ifdef TRACE
_nc_tracing = TRACE_MOVE;
#endif
- for (;;)
- {
- int n;
+ for (;;) {
+ int n;
for (n = 0; n < screen_lines; n++)
oldnums[n] = _NEWINDEX;
/* grab the test vector */
- if (fgets(line, sizeof(line), stdin) == (char *)NULL)
+ if (fgets(line, sizeof(line), stdin) == (char *) NULL)
exit(EXIT_SUCCESS);
/* parse it */
n = 0;
- if (line[0] == '#')
- {
+ if (line[0] == '#') {
(void) fputs(line, stderr);
continue;
}
do {
oldnums[n++] = atoi(st);
} while
- ((st = strtok((char *)NULL, " ")) != 0);
+ ((st = strtok((char *) NULL, " ")) != 0);
/* display it */
(void) fputs("Initial input:\n", stderr);
projects / ncurses.git / blobdiff