X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Ftty%2Fhardscroll.c;h=2c40997fb6b1c090f5932458b2e72736f61d1b78;hp=b80d08aa5467764cf5fe0a6d0dd30e7a243d0d10;hb=1c2ec25b8186b7973aeb06ec4da6b63656e12f7d;hpb=0eb88fc5281804773e2a0c7a488a4452463535ce;ds=sidebyside diff --git a/ncurses/tty/hardscroll.c b/ncurses/tty/hardscroll.c index b80d08aa..2c40997f 100644 --- a/ncurses/tty/hardscroll.c +++ b/ncurses/tty/hardscroll.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 1998 Free Software Foundation, Inc. * + * Copyright (c) 1998-2007,2008 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 * @@ -29,9 +29,10 @@ /**************************************************************************** * Author: Zeyd M. Ben-Halim 1992,1995 * * and: Eric S. Raymond * + * and: Thomas E. Dickey 1996-on * + * and: Alexander V Lukyanov 1997-1998 * ****************************************************************************/ - /****************************************************************************** NAME @@ -146,53 +147,58 @@ AUTHOR #include -MODULE_ID("$Id: hardscroll.c,v 1.33 1999/02/27 20:01:29 tom Exp $") +MODULE_ID("$Id: hardscroll.c,v 1.42 2008/08/03 23:49:30 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 # define TR(n, a) if (_nc_tracing & (n)) { _tracef a ; putchar('\n'); } +extern NCURSES_EXPORT_VAR(unsigned) _nc_tracing; + #else /* no debug */ /* 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; int start, end, shift; - TR(TRACE_ICALLS, ("_nc_scroll_optimize() begins")); + TR(TRACE_ICALLS, (T_CALLED("_nc_scroll_optimize"))); #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(); @@ -200,30 +206,31 @@ void _nc_scroll_optimize(void) #endif /* !defined(SCROLLDEBUG) && !defined(HASHDEBUG) */ #ifdef TRACE - if (_nc_tracing & (TRACE_UPDATE | TRACE_MOVE)) + if (USE_TRACEF(TRACE_UPDATE | TRACE_MOVE)) { _nc_linedump(); + _nc_unlock_global(tracef); + } #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; } @@ -231,81 +238,74 @@ void _nc_scroll_optimize(void) } /* 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; } #endif /* !defined(SCROLLDEBUG) && !defined(HASHDEBUG) */ } + TR(TRACE_ICALLS, (T_RETURN(""))); } #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; - - if (have < want) - buf = typeMalloc(char, have = 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 + int n; + char *buf = 0; + size_t want = (screen_lines + 1) * 4; + + if ((buf = typeMalloc(char, want)) != 0) { + + (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)); + free(buf); + } } #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; } @@ -313,7 +313,7 @@ main(int argc GCC_UNUSED, char *argv[] GCC_UNUSED) do { oldnums[n++] = atoi(st); } while - ((st = strtok((char *)NULL, " ")) != 0); + ((st = strtok((char *) NULL, " ")) != 0); /* display it */ (void) fputs("Initial input:\n", stderr);