ncurses-6.2ncurses-6.2

1 files changed, 818 insertions, 30 deletions

diff --git a/ncurses/base/lib_screen.c b/ncurses/base/lib_screen.c
index 695ed30..164356d 100644
--- a/ncurses/base/lib_screen.c
+++ b/ncurses/base/lib_screen.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2009,2011 Free Software Foundation, Inc.              *
+ * Copyright 2019,2020 Thomas E. Dickey                                     *
+ * Copyright 1998-2017,2018 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            *
@@ -35,32 +36,509 @@
 
 #include <curses.priv.h>
 
+#include <ctype.h>
+
 #ifndef CUR
 #define CUR SP_TERMTYPE
 #endif
 
-MODULE_ID("$Id: lib_screen.c,v 1.41 2011/10/22 15:03:11 tom Exp $")
+MODULE_ID("$Id: lib_screen.c,v 1.97 2020/02/02 23:34:34 tom Exp $")
 
 #define MAX_SIZE 0x3fff		/* 16k is big enough for a window or pad */
 
+#define MARKER '\\'
+#define APPEND '+'
+#define GUTTER '|'
+#define L_CURL '{'
+#define R_CURL '}'
+
+#if USE_STRING_HACKS && HAVE_SNPRINTF
+#define ARG_SLIMIT(name) size_t name,
+#else
+#define ARG_SLIMIT(name)	/* nothing */
+#endif
+
+#define CUR_SLIMIT _nc_SLIMIT(limit - (target - base))
+#define TOP_SLIMIT _nc_SLIMIT(sizeof(buffer))
+
+/*
+ * Use 0x888888 as the magic number for new-format files, since it cannot be
+ * mistaken for the _cury/_curx pair of 16-bit numbers which start the old
+ * format.  It happens to be unused in the file 5.22 database (2015/03/07).
+ */
+static const char my_magic[] =
+{'\210', '\210', '\210', '\210'};
+
+#if NCURSES_EXT_PUTWIN
+typedef enum {
+    pINT			/* int */
+    ,pSHORT			/* short */
+    ,pBOOL			/* bool */
+    ,pATTR			/* attr_t */
+    ,pCHAR			/* chtype */
+    ,pSIZE			/* NCURSES_SIZE_T */
+#if NCURSES_WIDECHAR
+    ,pCCHAR			/* cchar_t */
+#endif
+} PARAM_TYPE;
+
+typedef struct {
+    const char name[11];
+    attr_t attr;
+} SCR_ATTRS;
+
+typedef struct {
+    const char name[17];
+    PARAM_TYPE type;
+    size_t size;
+    size_t offset;
+} SCR_PARAMS;
+
+#define DATA(name) { { #name }, A_##name }
+static const SCR_ATTRS scr_attrs[] =
+{
+    DATA(NORMAL),
+    DATA(STANDOUT),
+    DATA(UNDERLINE),
+    DATA(REVERSE),
+    DATA(BLINK),
+    DATA(DIM),
+    DATA(BOLD),
+    DATA(ALTCHARSET),
+    DATA(INVIS),
+    DATA(PROTECT),
+    DATA(HORIZONTAL),
+    DATA(LEFT),
+    DATA(LOW),
+    DATA(RIGHT),
+    DATA(TOP),
+    DATA(VERTICAL),
+
+#ifdef A_ITALIC
+    DATA(ITALIC),
+#endif
+};
+#undef DATA
+
+#define sizeof2(type,name) sizeof(((type *)0)->name)
+#define DATA(name, type) { { #name }, type, sizeof2(WINDOW, name), offsetof(WINDOW, name) }
+
+static const SCR_PARAMS scr_params[] =
+{
+    DATA(_cury, pSIZE),
+    DATA(_curx, pSIZE),
+    DATA(_maxy, pSIZE),
+    DATA(_maxx, pSIZE),
+    DATA(_begy, pSIZE),
+    DATA(_begx, pSIZE),
+    DATA(_flags, pSHORT),
+    DATA(_attrs, pATTR),
+    DATA(_bkgd, pCHAR),
+    DATA(_notimeout, pBOOL),
+    DATA(_clear, pBOOL),
+    DATA(_leaveok, pBOOL),
+    DATA(_scroll, pBOOL),
+    DATA(_idlok, pBOOL),
+    DATA(_idcok, pBOOL),
+    DATA(_immed, pBOOL),
+    DATA(_sync, pBOOL),
+    DATA(_use_keypad, pBOOL),
+    DATA(_delay, pINT),
+    DATA(_regtop, pSIZE),
+    DATA(_regbottom, pSIZE),
+    DATA(_pad._pad_y, pSIZE),
+    DATA(_pad._pad_x, pSIZE),
+    DATA(_pad._pad_top, pSIZE),
+    DATA(_pad._pad_left, pSIZE),
+    DATA(_pad._pad_bottom, pSIZE),
+    DATA(_pad._pad_right, pSIZE),
+    DATA(_yoffset, pSIZE),
+#if NCURSES_WIDECHAR
+    DATA(_bkgrnd, pCCHAR),
+#if NCURSES_EXT_COLORS
+    DATA(_color, pINT),
+#endif
+#endif
+};
+#undef DATA
+
+static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
+
+/*
+ * Allocate and read a line of text.  Caller must free it.
+ */
+static char *
+read_txt(FILE *fp)
+{
+    size_t limit = 1024;
+    char *result = malloc(limit);
+    char *buffer;
+
+    if (result != 0) {
+	int ch = 0;
+	size_t used = 0;
+
+	clearerr(fp);
+	result[used] = '\0';
+	do {
+	    if (used + 2 >= limit) {
+		limit += 1024;
+		buffer = realloc(result, limit);
+		if (buffer == 0) {
+		    free(result);
+		    result = 0;
+		    break;
+		}
+		result = buffer;
+	    }
+	    ch = fgetc(fp);
+	    if (ch == EOF)
+		break;
+	    result[used++] = (char) ch;
+	    result[used] = '\0';
+	} while (ch != '\n');
+
+	if (ch == '\n') {
+	    result[--used] = '\0';
+	    T(("READ:%s", result));
+	} else if (used == 0) {
+	    free(result);
+	    result = 0;
+	}
+    }
+    return result;
+}
+
+static char *
+decode_attr(char *source, attr_t *target, int *color)
+{
+    bool found = FALSE;
+
+    T(("decode_attr   '%s'", source));
+
+    while (*source) {
+	if (source[0] == MARKER && source[1] == L_CURL) {
+	    source += 2;
+	    found = TRUE;
+	} else if (source[0] == R_CURL) {
+	    source++;
+	    found = FALSE;
+	} else if (found) {
+	    size_t n;
+	    char *next = source;
+
+	    if (source[0] == GUTTER) {
+		++next;
+	    } else if (*next == 'C') {
+		int value = 0;
+		unsigned pair;
+		next++;
+		while (isdigit(UChar(*next))) {
+		    value = value * 10 + (*next++ - '0');
+		}
+		*target &= ~A_COLOR;
+		pair = (unsigned) ((value > 256)
+				   ? COLOR_PAIR(255)
+				   : COLOR_PAIR(value));
+		*target |= pair;
+		*color = value;
+	    } else {
+		while (isalnum(UChar(*next))) {
+		    ++next;
+		}
+		for (n = 0; n < SIZEOF(scr_attrs); ++n) {
+		    if ((size_t) (next - source) == strlen(scr_attrs[n].name)) {
+			if (scr_attrs[n].attr) {
+			    *target |= scr_attrs[n].attr;
+			} else {
+			    *target = A_NORMAL;
+			}
+			break;
+		    }
+		}
+	    }
+	    source = next;
+	} else {
+	    break;
+	}
+    }
+    return source;
+}
+
+static char *
+decode_char(char *source, int *target)
+{
+    int limit = 0;
+    int base = 16;
+    const char digits[] = "0123456789abcdef";
+
+    T(("decode_char   '%s'", source));
+    *target = ' ';
+    switch (*source) {
+    case MARKER:
+	switch (*++source) {
+	case APPEND:
+	    break;
+	case MARKER:
+	    *target = MARKER;
+	    ++source;
+	    break;
+	case 's':
+	    *target = ' ';
+	    ++source;
+	    break;
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	    base = 8;
+	    limit = 3;
+	    break;
+	case 'u':
+	    limit = 4;
+	    ++source;
+	    break;
+	case 'U':
+	    limit = 8;
+	    ++source;
+	    break;
+	}
+	if (limit) {
+	    *target = 0;
+	    while (limit-- > 0) {
+		char *find = strchr(digits, *source++);
+		int ch = (find != 0) ? (int) (find - digits) : -1;
+		*target *= base;
+		if (ch >= 0 && ch < base) {
+		    *target += ch;
+		}
+	    }
+	}
+	break;
+    default:
+	*target = *source++;
+	break;
+    }
+    return source;
+}
+
+static char *
+decode_chtype(char *source, chtype fillin, chtype *target)
+{
+    attr_t attr = ChAttrOf(fillin);
+    int color = PAIR_NUMBER((int) attr);
+    int value;
+
+    T(("decode_chtype '%s'", source));
+    source = decode_attr(source, &attr, &color);
+    source = decode_char(source, &value);
+    *target = (ChCharOf(value) | attr | (chtype) COLOR_PAIR(color));
+    /* FIXME - ignore combining characters */
+    return source;
+}
+
+#if NCURSES_WIDECHAR
+static char *
+decode_cchar(char *source, cchar_t *fillin, cchar_t *target)
+{
+    int color;
+    attr_t attr = fillin->attr;
+    wchar_t chars[CCHARW_MAX];
+    int append = 0;
+    int value = 0;
+
+    T(("decode_cchar  '%s'", source));
+    *target = blank;
+#if NCURSES_EXT_COLORS
+    color = fillin->ext_color;
+#else
+    color = (int) PAIR_NUMBER(attr);
+#endif
+    source = decode_attr(source, &attr, &color);
+    memset(chars, 0, sizeof(chars));
+    source = decode_char(source, &value);
+    chars[0] = (wchar_t) value;
+    /* handle combining characters */
+    while (source[0] == MARKER && source[1] == APPEND) {
+	source += 2;
+	source = decode_char(source, &value);
+	if (++append < CCHARW_MAX) {
+	    chars[append] = (wchar_t) value;
+	}
+    }
+    setcchar(target, chars, attr, (short) color, &color);
+    return source;
+}
+#endif
+
+static int
+read_win(WINDOW *win, FILE *fp)
+{
+    int code = ERR;
+    size_t n;
+    int color;
+#if NCURSES_WIDECHAR
+    NCURSES_CH_T prior;
+#endif
+    chtype prior2;
+
+    memset(win, 0, sizeof(WINDOW));
+    for (;;) {
+	char *name;
+	char *value;
+	char *txt = read_txt(fp);
+
+	if (txt == 0)
+	    break;
+	if (!strcmp(txt, "rows:")) {
+	    free(txt);
+	    code = OK;
+	    break;
+	}
+	if ((value = strchr(txt, '=')) == 0) {
+	    free(txt);
+	    continue;
+	}
+	*value++ = '\0';
+	name = !strcmp(txt, "flag") ? value : txt;
+	for (n = 0; n < SIZEOF(scr_params); ++n) {
+	    if (!strcmp(name, scr_params[n].name)) {
+		void *data = (void *) ((char *) win + scr_params[n].offset);
+
+		switch (scr_params[n].type) {
+		case pATTR:
+		    (void) decode_attr(value, data, &color);
+		    break;
+		case pBOOL:
+		    *(bool *) data = TRUE;
+		    break;
+		case pCHAR:
+		    prior2 = ' ';
+		    decode_chtype(value, prior2, data);
+		    break;
+		case pINT:
+		    *(int *) data = atoi(value);
+		    break;
+		case pSHORT:
+		    *(short *) data = (short) atoi(value);
+		    break;
+		case pSIZE:
+		    *(NCURSES_SIZE_T *) data = (NCURSES_SIZE_T) atoi(value);
+		    break;
+#if NCURSES_WIDECHAR
+		case pCCHAR:
+		    prior = blank;
+		    decode_cchar(value, &prior, data);
+		    break;
+#endif
+		}
+		break;
+	    }
+	}
+	free(txt);
+    }
+    return code;
+}
+
+static int
+read_row(char *source, NCURSES_CH_T * prior, NCURSES_CH_T * target, int length)
+{
+    while (*source != '\0' && length > 0) {
+#if NCURSES_WIDECHAR
+	int len;
+
+	source = decode_cchar(source, prior, target);
+	len = _nc_wacs_width(target->chars[0]);
+	if (len > 1) {
+	    int n;
+
+	    SetWidecExt(CHDEREF(target), 0);
+	    for (n = 1; n < len; ++n) {
+		target[n] = target[0];
+		SetWidecExt(CHDEREF(target), n);
+	    }
+	    target += (len - 1);
+	    length -= (len - 1);
+	}
+#else
+	source = decode_chtype(source, *prior, target);
+#endif
+	*prior = *target;
+	++target;
+	--length;
+    }
+    while (length-- > 0) {
+	*target++ = blank;
+    }
+    /* FIXME - see what error conditions should apply if I need to return ERR */
+    return 0;
+}
+#endif /* NCURSES_EXT_PUTWIN */
+
+/*
+ * Originally, getwin/putwin used fread/fwrite, because they used binary data.
+ * The new format uses printable ASCII, which does not have as predictable
+ * sizes.  Consequently, we use buffered I/O, e.g., fgetc/fprintf, which need
+ * special handling if we want to read screen dumps from an older library.
+ */
+static int
+read_block(void *target, size_t length, FILE *fp)
+{
+    int result = 0;
+    char *buffer = target;
+
+    clearerr(fp);
+    while (length-- != 0) {
+	int ch = fgetc(fp);
+	if (ch == EOF) {
+	    result = -1;
+	    break;
+	}
+	*buffer++ = (char) ch;
+    }
+    return result;
+}
+
 NCURSES_EXPORT(WINDOW *)
 NCURSES_SP_NAME(getwin) (NCURSES_SP_DCLx FILE *filep)
 {
     WINDOW tmp, *nwin;
-    int n;
+    bool old_format = FALSE;
 
     T((T_CALLED("getwin(%p)"), (void *) filep));
 
     if (filep == 0) {
 	returnWin(0);
     }
-    clearerr(filep);
-    if (fread(&tmp, (size_t) 1, sizeof(WINDOW), filep) < sizeof(WINDOW)
-	|| ferror(filep)
-	|| tmp._maxy == 0
-	|| tmp._maxy > MAX_SIZE
-	|| tmp._maxx == 0
-	|| tmp._maxx > MAX_SIZE) {
+
+    /*
+     * Read the first 4 bytes to determine first if this is an old-format
+     * screen-dump, or new-format.
+     */
+    if (read_block(&tmp, (size_t) 4, filep) < 0) {
+	returnWin(0);
+    }
+    /*
+     * If this is a new-format file, and we do not support it, give up.
+     */
+    if (!memcmp(&tmp, my_magic, (size_t) 4)) {
+#if NCURSES_EXT_PUTWIN
+	if (read_win(&tmp, filep) < 0)
+#endif
+	    returnWin(0);
+    } else if (read_block(((char *) &tmp) + 4, sizeof(WINDOW) - 4, filep) < 0) {
+	returnWin(0);
+    } else {
+	old_format = TRUE;
+    }
+
+    /*
+     * Check the window-size:
+     */
+    if (tmp._maxy == 0 ||
+	tmp._maxy > MAX_SIZE ||
+	tmp._maxx == 0 ||
+	tmp._maxx > MAX_SIZE) {
 	returnWin(0);
     }
 
@@ -80,6 +558,7 @@ NCURSES_SP_NAME(getwin) (NCURSES_SP_DCLx FILE *filep)
      * made sense is probably gone.
      */
     if (nwin != 0) {
+	int n;
 	size_t linesize = sizeof(NCURSES_CH_T) * (size_t) (tmp._maxx + 1);
 
 	nwin->_curx = tmp._curx;
@@ -111,14 +590,55 @@ NCURSES_SP_NAME(getwin) (NCURSES_SP_DCLx FILE *filep)
 	if (tmp._flags & _ISPAD)
 	    nwin->_pad = tmp._pad;
 
-	for (n = 0; n <= nwin->_maxy; n++) {
-	    clearerr(filep);
-	    if (fread(nwin->_line[n].text, (size_t) 1, linesize, filep) < linesize
-		|| ferror(filep)) {
+	if (old_format) {
+	    T(("reading old-format screen dump"));
+	    for (n = 0; n <= nwin->_maxy; n++) {
+		if (read_block(nwin->_line[n].text, linesize, filep) < 0) {
+		    delwin(nwin);
+		    returnWin(0);
+		}
+	    }
+	}
+#if NCURSES_EXT_PUTWIN
+	else {
+	    char *txt = 0;
+	    bool success = TRUE;
+	    NCURSES_CH_T prior = blank;
+
+	    T(("reading new-format screen dump"));
+	    for (n = 0; n <= nwin->_maxy; n++) {
+		long row;
+		char *next;
+
+		if ((txt = read_txt(filep)) == 0) {
+		    T(("...failed to read string for row %d", n + 1));
+		    success = FALSE;
+		    break;
+		}
+		row = strtol(txt, &next, 10);
+		if (row != (n + 1) || *next != ':') {
+		    T(("...failed to read row-number %d", n + 1));
+		    success = FALSE;
+		    break;
+		}
+
+		if (read_row(++next, &prior, nwin->_line[n].text, tmp._maxx
+			     + 1) < 0) {
+		    T(("...failed to read cells for row %d", n + 1));
+		    success = FALSE;
+		    break;
+		}
+		free(txt);
+		txt = 0;
+	    }
+
+	    if (!success) {
+		free(txt);
 		delwin(nwin);
 		returnWin(0);
 	    }
 	}
+#endif
 	touchwin(nwin);
     }
     returnWin(nwin);
@@ -132,24 +652,283 @@ getwin(FILE *filep)
 }
 #endif
 
+#if NCURSES_EXT_PUTWIN
+static void
+encode_attr(char *target, ARG_SLIMIT(limit)
+	    attr_t source,
+	    attr_t prior,
+	    int source_color,
+	    int prior_color)
+{
+#if USE_STRING_HACKS && HAVE_SNPRINTF
+    char *base = target;
+#endif
+    source &= ~A_CHARTEXT;
+    prior &= ~A_CHARTEXT;
+
+    *target = '\0';
+    if ((source != prior) || (source_color != prior_color)) {
+	size_t n;
+	bool first = TRUE;
+
+	*target++ = MARKER;
+	*target++ = L_CURL;
+
+	for (n = 0; n < SIZEOF(scr_attrs); ++n) {
+	    if ((source & scr_attrs[n].attr) != 0 ||
+		((source & ALL_BUT_COLOR) == 0 &&
+		 (scr_attrs[n].attr == A_NORMAL))) {
+		if (first) {
+		    first = FALSE;
+		} else {
+		    *target++ = '|';
+		}
+		_nc_STRCPY(target, scr_attrs[n].name, limit);
+		target += strlen(target);
+	    }
+	}
+	if (source_color != prior_color) {
+	    if (!first)
+		*target++ = '|';
+	    _nc_SPRINTF(target, CUR_SLIMIT "C%d", source_color);
+	    target += strlen(target);
+	}
+
+	*target++ = R_CURL;
+	*target = '\0';
+    }
+}
+
+static void
+encode_cell(char *target, ARG_SLIMIT(limit) CARG_CH_T source, CARG_CH_T previous)
+{
+#if USE_STRING_HACKS && HAVE_SNPRINTF
+    char *base = target;
+#endif
+#if NCURSES_WIDECHAR
+    size_t n;
+    int source_pair = GetPair(*source);
+    int previous_pair = GetPair(*previous);
+
+    *target = '\0';
+    if ((previous->attr != source->attr) || (previous_pair != source_pair)) {
+	encode_attr(target, CUR_SLIMIT
+		    source->attr,
+		    previous->attr,
+		    source_pair,
+		    previous_pair);
+    }
+    target += strlen(target);
+#if NCURSES_EXT_COLORS
+    if (previous->ext_color != source->ext_color) {
+	_nc_SPRINTF(target, CUR_SLIMIT
+		    "%c%cC%d%c", MARKER, L_CURL, source->ext_color, R_CURL);
+    }
+#endif
+    for (n = 0; n < SIZEOF(source->chars); ++n) {
+	unsigned uch = (unsigned) source->chars[n];
+	if (uch == 0)
+	    continue;
+	if (n) {
+	    *target++ = MARKER;
+	    *target++ = APPEND;
+	}
+	*target++ = MARKER;
+	if (uch > 0xffff) {
+	    _nc_SPRINTF(target, CUR_SLIMIT "U%08x", uch);
+	} else if (uch > 0xff) {
+	    _nc_SPRINTF(target, CUR_SLIMIT "u%04x", uch);
+	} else if (uch < 32 || uch >= 127) {
+	    _nc_SPRINTF(target, CUR_SLIMIT "%03o", uch & 0xff);
+	} else {
+	    switch (uch) {
+	    case ' ':
+		_nc_STRCPY(target, "s", limit);
+		break;
+	    case MARKER:
+		*target++ = MARKER;
+		*target = '\0';
+		break;
+	    default:
+		--target;
+		_nc_SPRINTF(target, CUR_SLIMIT "%c", uch);
+		break;
+	    }
+	}
+	target += strlen(target);
+    }
+#else
+    chtype ch = CharOfD(source);
+
+    *target = '\0';
+    if (AttrOfD(previous) != AttrOfD(source)) {
+	encode_attr(target, CUR_SLIMIT
+		    AttrOfD(source),
+		    AttrOfD(previous),
+		    GetPair(source),
+		    GetPair(previous));
+    }
+    target += strlen(target);
+    *target++ = MARKER;
+    if (ch < 32 || ch >= 127) {
+	_nc_SPRINTF(target, CUR_SLIMIT "%03o", UChar(ch));
+    } else {
+	switch (ch) {
+	case ' ':
+	    _nc_STRCPY(target, "s", limit);
+	    break;
+	case MARKER:
+	    *target++ = MARKER;
+	    *target = '\0';
+	    break;
+	default:
+	    --target;
+	    _nc_SPRINTF(target, CUR_SLIMIT "%c", UChar(ch));
+	    break;
+	}
+    }
+#endif
+}
+#endif
+
 NCURSES_EXPORT(int)
 putwin(WINDOW *win, FILE *filep)
 {
     int code = ERR;
-    int n;
 
     T((T_CALLED("putwin(%p,%p)"), (void *) win, (void *) filep));
 
+#if NCURSES_EXT_PUTWIN
+    if (win != 0) {
+	const char *version = curses_version();
+	char buffer[1024];
+	NCURSES_CH_T last_cell;
+	int y;
+
+	memset(&last_cell, 0, sizeof(last_cell));
+
+	clearerr(filep);
+
+	/*
+	 * Our magic number is technically nonprinting, but aside from that,
+	 * all of the file is printable ASCII.
+	 */
+#define PUTS(s) if (fputs(s, filep) == EOF || ferror(filep)) returnCode(code)
+	PUTS(my_magic);
+	PUTS(version);
+	PUTS("\n");
+	for (y = 0; y < (int) SIZEOF(scr_params); ++y) {
+	    const char *name = scr_params[y].name;
+	    const char *data = (char *) win + scr_params[y].offset;
+	    const void *dp = (const void *) data;
+	    attr_t attr;
+
+	    *buffer = '\0';
+	    if (!strncmp(name, "_pad.", (size_t) 5) && !(win->_flags & _ISPAD)) {
+		continue;
+	    }
+	    switch (scr_params[y].type) {
+	    case pATTR:
+		attr = (*(const attr_t *) dp) & ~A_CHARTEXT;
+		encode_attr(buffer, TOP_SLIMIT
+			    (*(const attr_t *) dp) & ~A_CHARTEXT,
+			    A_NORMAL,
+			    COLOR_PAIR((int) attr),
+			    0);
+		break;
+	    case pBOOL:
+		if (!(*(const bool *) data)) {
+		    continue;
+		}
+		_nc_STRCPY(buffer, name, sizeof(buffer));
+		name = "flag";
+		break;
+	    case pCHAR:
+		attr = (*(const attr_t *) dp);
+		encode_attr(buffer, TOP_SLIMIT
+			    * (const attr_t *) dp,
+			    A_NORMAL,
+			    COLOR_PAIR((int) attr),
+			    0);
+		break;
+	    case pINT:
+		if (!(*(const int *) dp))
+		    continue;
+		_nc_SPRINTF(buffer, TOP_SLIMIT
+			    "%d", *(const int *) dp);
+		break;
+	    case pSHORT:
+		if (!(*(const short *) dp))
+		    continue;
+		_nc_SPRINTF(buffer, TOP_SLIMIT
+			    "%d", *(const short *) dp);
+		break;
+	    case pSIZE:
+		if (!(*(const NCURSES_SIZE_T *) dp))
+		    continue;
+		_nc_SPRINTF(buffer, TOP_SLIMIT
+			    "%d", *(const NCURSES_SIZE_T *) dp);
+		break;
+#if NCURSES_WIDECHAR
+	    case pCCHAR:
+		encode_cell(buffer, TOP_SLIMIT
+			    (CARG_CH_T) dp, CHREF(last_cell));
+		break;
+#endif
+	    }
+	    /*
+	     * Only write non-default data.
+	     */
+	    if (*buffer != '\0') {
+		if (fprintf(filep, "%s=%s\n", name, buffer) <= 0
+		    || ferror(filep))
+		    returnCode(code);
+	    }
+	}
+	/* Write row-data */
+	fprintf(filep, "rows:\n");
+	for (y = 0; y <= win->_maxy; y++) {
+	    NCURSES_CH_T *data = win->_line[y].text;
+	    int x;
+	    if (fprintf(filep, "%d:", y + 1) <= 0
+		|| ferror(filep))
+		returnCode(code);
+	    for (x = 0; x <= win->_maxx; x++) {
+#if NCURSES_WIDECHAR
+		int len = _nc_wacs_width(data[x].chars[0]);
+		encode_cell(buffer, TOP_SLIMIT CHREF(data[x]), CHREF(last_cell));
+		last_cell = data[x];
+		PUTS(buffer);
+		if (len > 1)
+		    x += (len - 1);
+#else
+		encode_cell(buffer, TOP_SLIMIT CHREF(data[x]), CHREF(last_cell));
+		last_cell = data[x];
+		PUTS(buffer);
+#endif
+	    }
+	    PUTS("\n");
+	}
+	code = OK;
+    }
+#else
+    /*
+     * This is the original putwin():
+     * A straight binary dump is simple, but its format can depend on whether
+     * ncurses is compiled with wide-character support, and also may depend
+     * on the version of ncurses, e.g., if the WINDOW structure is extended.
+     */
     if (win != 0) {
 	size_t len = (size_t) (win->_maxx + 1);
+	int y;
 
 	clearerr(filep);
 	if (fwrite(win, sizeof(WINDOW), (size_t) 1, filep) != 1
 	    || ferror(filep))
 	      returnCode(code);
 
-	for (n = 0; n <= win->_maxy; n++) {
-	    if (fwrite(win->_line[n].text,
+	for (y = 0; y <= win->_maxy; y++) {
+	    if (fwrite(win->_line[y].text,
 		       sizeof(NCURSES_CH_T), len, filep) != len
 		|| ferror(filep)) {
 		returnCode(code);
@@ -157,6 +936,7 @@ putwin(WINDOW *win, FILE *filep)
 	}
 	code = OK;
     }
+#endif
     returnCode(code);
 }
 
@@ -164,21 +944,23 @@ NCURSES_EXPORT(int)
 NCURSES_SP_NAME(scr_restore) (NCURSES_SP_DCLx const char *file)
 {
     FILE *fp = 0;
+    int code = ERR;
 
     T((T_CALLED("scr_restore(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
 
-    if (_nc_access(file, R_OK) < 0
-	|| (fp = fopen(file, "rb")) == 0) {
-	returnCode(ERR);
-    } else {
+    if (_nc_access(file, R_OK) >= 0
+	&& (fp = fopen(file, BIN_R)) != 0) {
 	delwin(NewScreen(SP_PARM));
 	NewScreen(SP_PARM) = getwin(fp);
 #if !USE_REENTRANT
 	newscr = NewScreen(SP_PARM);
 #endif
 	(void) fclose(fp);
-	returnCode(OK);
+	if (NewScreen(SP_PARM) != 0) {
+	    code = OK;
+	}
     }
+    returnCode(code);
 }
 
 #if NCURSES_SP_FUNCS
@@ -198,7 +980,7 @@ scr_dump(const char *file)
     T((T_CALLED("scr_dump(%s)"), _nc_visbuf(file)));
 
     if (_nc_access(file, W_OK) < 0
-	|| (fp = fopen(file, "wb")) == 0) {
+	|| (fp = fopen(file, BIN_W)) == 0) {
 	result = ERR;
     } else {
 	(void) putwin(newscr, fp);
@@ -211,7 +993,6 @@ scr_dump(const char *file)
 NCURSES_EXPORT(int)
 NCURSES_SP_NAME(scr_init) (NCURSES_SP_DCLx const char *file)
 {
-    FILE *fp = 0;
     int code = ERR;
 
     T((T_CALLED("scr_init(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
@@ -223,15 +1004,19 @@ NCURSES_SP_NAME(scr_init) (NCURSES_SP_DCLx const char *file)
 	!(exit_ca_mode && non_rev_rmcup)
 #endif
 	) {
+	FILE *fp = 0;
+
 	if (_nc_access(file, R_OK) >= 0
-	    && (fp = fopen(file, "rb")) != 0) {
+	    && (fp = fopen(file, BIN_R)) != 0) {
 	    delwin(CurScreen(SP_PARM));
 	    CurScreen(SP_PARM) = getwin(fp);
 #if !USE_REENTRANT
 	    curscr = CurScreen(SP_PARM);
 #endif
 	    (void) fclose(fp);
-	    code = OK;
+	    if (CurScreen(SP_PARM) != 0) {
+		code = OK;
+	    }
 	}
     }
     returnCode(code);
@@ -248,18 +1033,21 @@ scr_init(const char *file)
 NCURSES_EXPORT(int)
 NCURSES_SP_NAME(scr_set) (NCURSES_SP_DCLx const char *file)
 {
+    int code = ERR;
+
     T((T_CALLED("scr_set(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
 
-    if (NCURSES_SP_NAME(scr_init) (NCURSES_SP_ARGx file) == ERR) {
-	returnCode(ERR);
-    } else {
+    if (NCURSES_SP_NAME(scr_init) (NCURSES_SP_ARGx file) == OK) {
 	delwin(NewScreen(SP_PARM));
 	NewScreen(SP_PARM) = dupwin(curscr);
 #if !USE_REENTRANT
 	newscr = NewScreen(SP_PARM);
 #endif
-	returnCode(OK);
+	if (NewScreen(SP_PARM) != 0) {
+	    code = OK;
+	}
     }
+    returnCode(code);
 }
 
 #if NCURSES_SP_FUNCS