+#define MARKER '\\'
+#define GUTTER '|'
+#define L_CURL '{'
+#define R_CURL '}'
+
+#define L_MARK "\\{"
+#define R_MARK "}"
+
+/*
+ * Use 0x8888 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 char my_magic[] =
+{'\210', '\210', '\210', '\210'};
+
+#if NCURSES_EXT_SCREEN_DUMP
+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;
+ attr_t attr;
+} SCR_ATTRS;
+
+typedef struct {
+ const char *name;
+ PARAM_TYPE type;
+ size_t size;
+ size_t offset;
+} SCR_PARAMS;
+
+#define DATA(name) { #name, A_##name }
+static 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 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;
+ size_t used = 0;
+ char *result = malloc(limit);
+ char *buffer;
+
+ if (result != 0) {
+ int ch = 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;
+ }
+ }
+ 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;
+ next++;
+ while (isdigit(UChar(*next))) {
+ value = value * 10 + (*next++ - '0');
+ }
+ *target &= ~A_COLOR;
+ if (value > 256) {
+ *target |= COLOR_PAIR(255);
+ } else {
+ *target |= COLOR_PAIR(value);
+ }
+ *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 '\\':
+ switch (*++source) {
+ case '\\':
+ *target = '\\';
+ ++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(attr);
+ int value;
+
+ T(("decode_chtype '%s'", source));
+ source = decode_attr(source, &attr, &color);
+ source = decode_char(source, &value);
+ *target = ChCharOf(value) | attr | COLOR_PAIR(color);
+ 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];
+
+ 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, &chars[0]);
+ /* FIXME - handle combining characters at this point */
+ setcchar(target, chars, attr, (short) color, NULL);
+ return source;
+}
+#endif
+
+static int
+read_win(WINDOW *win, FILE *fp)
+{
+ int code = ERR;
+ char *txt;
+ char *name;
+ char *value;
+ size_t n;
+ int color;
+#if NCURSES_WIDECHAR
+ NCURSES_CH_T prior;
+#endif
+ chtype prior2;
+
+ memset(win, 0, sizeof(WINDOW));
+ for (;;) {
+ 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
+ source = decode_cchar(source, prior, target);
+#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_SCREEN_DUMP */
+
+/*
+ * 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;
+}
+
projects / ncurses.git / commitdiff