/****************************************************************************
- * Copyright 2018-2021,2022 Thomas E. Dickey *
+ * Copyright 2018-2023,2024 Thomas E. Dickey *
* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
#include <locale.h>
#endif
-MODULE_ID("$Id: lib_setup.c,v 1.217 2022/07/21 08:24:50 tom Exp $")
+MODULE_ID("$Id: lib_setup.c,v 1.239 2024/04/14 17:03:40 tom Exp $")
/****************************************************************************
*
}
#endif
+#if !(defined(USE_TERM_DRIVER) || defined(EXP_WIN32_DRIVER))
+static void
+_nc_default_screensize(TERMINAL *termp, int *linep, int *colp)
+{
+ /* if we can't get dynamic info about the size, use static */
+ if (*linep <= 0) {
+ *linep = (int) lines;
+ }
+ if (*colp <= 0) {
+ *colp = (int) columns;
+ }
+
+ /* the ultimate fallback, assume fixed 24x80 size */
+ if (*linep <= 0) {
+ *linep = 24;
+ }
+ if (*colp <= 0) {
+ *colp = 80;
+ }
+}
+
+#if defined(USE_CHECK_SIZE) && defined(user6) && defined(user7)
+static const char *
+skip_csi(const char *value)
+{
+ if (UChar(*value) == CSI_CHR) {
+ ++value;
+ } else if (*value == ESC_CHR && value[1] == L_BLOCK) {
+ value += 2;
+ }
+ return value;
+}
+
+static bool
+is_expected(const char *value, const char *expected)
+{
+ bool result = FALSE;
+ if (VALID_STRING(value)) {
+ const char *skipped = skip_csi(value);
+ if (skipped != value) {
+ if (!strcmp(skipped, expected))
+ result = TRUE;
+ }
+ }
+ return result;
+}
+
+static bool
+get_position(TERMINAL *termp, int fd, int *row, int *col)
+{
+ bool result = FALSE;
+ size_t need = strlen(user7);
+ int have;
+
+ have = (int) write(fd, user7, need);
+
+ if (have == (int) need) {
+ int y, x;
+ char buf[20];
+ char *s;
+ char cc;
+ const char *skipped;
+ int scanned;
+
+ s = memset(buf, '\0', sizeof(buf));
+ do {
+ size_t ask = (sizeof(buf) - 1 - (size_t) (s - buf));
+ int got = (int) read(fd, s, ask);
+ if (got == 0)
+ break;
+ s += got;
+ *s = '\0';
+ } while (strchr(buf, 'R') == NULL && (size_t) (s + 1 - buf) < sizeof(buf));
+ T(("CPR response %s", _nc_visbuf(buf)));
+ skipped = skip_csi(buf);
+ cc = '\0';
+ if (skipped != buf
+ && *skipped != '\0'
+ && (scanned = sscanf(skip_csi(buf), "%d;%d%c", &y, &x, &cc)) == 3
+ && (cc == 'R')) {
+ *row = y;
+ *col = x;
+ result = TRUE;
+ }
+ }
+ T(("get_position %s %d,%d", result ? "OK" : "ERR", *row, *col));
+ return result;
+}
+
+static bool
+set_position(NCURSES_SP_DCLx TERMINAL *termp, int row, int col)
+{
+ bool result;
+ char *actual = TIPARM_2(cursor_address, row, col);
+ T((T_CALLED("set_position %d,%d)"), row, col));
+#if NCURSES_SP_FUNCS
+ result = (NCURSES_SP_NAME(_nc_putp) (NCURSES_SP_ARGx "set_position",
+ actual) == OK);
+ NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
+#else
+ /* This does not support padding because without sp-funcs, we have only
+ * the interface using stdio, but we are not guaranteed that Filedes
+ * is the same as fileno(stdout).
+ */
+ result = FALSE;
+ if (actual != NULL) {
+ size_t want = strlen(actual);
+ int have = (int) write(termp->Filedes, actual, want);
+ result = ((int) want == have);
+ }
+#endif
+ returnBool(result);
+}
+
+/*
+ * This is a little more complicated than one might expect, because we do this
+ * before setting up the terminal modes, etc., and cannot use the timeout or
+ * buffering functions.
+ *
+ * We check if the terminal description has the ECMA-48 CPR (cursor position
+ * report) in u7 and the response in u6. The two variations of is_expected()
+ * cover the termcap style and terminfo style, and are equivalent as far as we
+ * are concerned. For analyzing the response, we wait (a short time) for 'R'
+ * to be echoed, and then check if we received two integers in the response.
+ *
+ * In principle, this could run on "any" ECMA-48 terminal, but in practice,
+ * there is a scenario using GNU screen where it uses ncurses with a partially
+ * configured pseudo-terminal, and the CPR response goes to the wrong place.
+ * So we do a simple check to exclude pseudo-terminals.
+ */
+static void
+_nc_check_screensize(SCREEN *sp, TERMINAL *termp, int *linep, int *colp)
+{
+ int fd = termp->Filedes;
+ TTY saved;
+ const char *name = NULL;
+
+ if (IsRealTty(fd, name)
+ && VALID_STRING(cursor_address)
+ && is_expected(user7, "6n")
+ && (is_expected(user6, "%i%d;%dR") ||
+ is_expected(user6, "%i%p1%d;%p2%dR"))
+ && GET_TTY(fd, &saved) == OK) {
+ int current_y = -1, current_x = -1;
+ int updated_y = -1, updated_x = -1;
+ TTY alter = saved;
+
+#if NCURSES_SP_FUNCS
+ if (sp == NULL) {
+ sp = new_prescr();
+ sp->_term = termp;
+ NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG);
+ }
+#else
+ (void) sp;
+#endif
+
+ T(("trying CPR (u7/u6) with %s", name));
+ alter.c_lflag &= (unsigned) ~(ECHO | ICANON | ISIG | IEXTEN);
+ alter.c_iflag &= (unsigned) ~(IXON | BRKINT | PARMRK);
+ alter.c_cc[VMIN] = 0;
+ alter.c_cc[VTIME] = 1;
+ SET_TTY(fd, &alter);
+
+ if (get_position(termp, fd, ¤t_y, ¤t_x)
+ && set_position(NCURSES_SP_ARGx termp, 9999, 9999)
+ && get_position(termp, fd, &updated_y, &updated_x)) {
+ *linep = updated_y;
+ *colp = updated_x;
+ set_position(NCURSES_SP_ARGx termp, current_y, current_x);
+ }
+ /* restore tty modes */
+ SET_TTY(fd, &saved);
+ } else {
+ T(("NOT trying CPR with fd %d (%s): %s",
+ fd, NonNull(name), NC_ISATTY(fd) ? "tty" : "not a tty"));
+ }
+
+ _nc_default_screensize(termp, linep, colp);
+}
+#else /* !USE_CHECK_SIZE */
+#define _nc_check_screensize(sp, termp, linep, colp) /* nothing */
+#endif
+#endif /* !(defined(USE_TERM_DRIVER) || defined(EXP_WIN32_DRIVER)) */
+
NCURSES_EXPORT(void)
_nc_get_screensize(SCREEN *sp,
#ifdef USE_TERM_DRIVER
bool useEnv = _nc_prescreen.use_env;
bool useTioctl = _nc_prescreen.use_tioctl;
+ T((T_CALLED("_nc_get_screensize (%p)"), sp));
#ifdef EXP_WIN32_DRIVER
/* If we are here, then Windows console is used in terminfo mode.
We need to figure out the size using the console API
}
#endif
+ T(("useEnv:%d useTioctl:%d", useEnv, useTioctl));
if (useEnv || useTioctl) {
#ifdef __EMX__
{
*colp = value;
T(("screen size: environment COLUMNS = %d", *colp));
}
- }
-
- /* if we can't get dynamic info about the size, use static */
- if (*linep <= 0) {
- *linep = (int) lines;
- }
- if (*colp <= 0) {
- *colp = (int) columns;
- }
- /* the ultimate fallback, assume fixed 24x80 size */
- if (*linep <= 0) {
- *linep = 24;
- }
- if (*colp <= 0) {
- *colp = 80;
+ _nc_default_screensize(termp, linep, colp);
+ } else {
+ _nc_check_screensize(sp, termp, linep, colp);
}
/*
OldNumber(termp, lines) = (short) (*linep);
OldNumber(termp, columns) = (short) (*colp);
#endif
+ } else {
+ _nc_check_screensize(sp, termp, linep, colp);
}
T(("screen size is %dx%d", *linep, *colp));
TABSIZE = my_tabsize;
#endif
T(("TABSIZE = %d", TABSIZE));
+ returnVoid;
#endif /* USE_TERM_DRIVER */
}
*/
if (status == TGETENT_YES) {
unsigned n;
+ T(("_nc_setup_tinfo - resetting invalid booleans/strings"));
for_each_boolean(n, tp) {
if (!VALID_BOOLEAN(tp->Booleans[n]))
tp->Booleans[n] = FALSE;
#endif
/*
-** Take the real command character out of the CC environment variable
-** and substitute it in for the prototype given in 'command_character'.
-*/
+ * Take the real command character out of the CC environment variable
+ * and substitute it in for the prototype given in 'command_character'.
+ */
void
_nc_tinfo_cmdch(TERMINAL *termp, int proto)
{
char CC = *tmp;
for_each_string(i, &(termp->type)) {
- for (tmp = termp->type.Strings[i]; tmp && *tmp; tmp++) {
- if (UChar(*tmp) == proto)
- *tmp = CC;
+ tmp = termp->type.Strings[i];
+ if (VALID_STRING(tmp)) {
+ for (; *tmp; ++tmp) {
+ if (UChar(*tmp) == proto)
+ *tmp = CC;
+ }
}
}
}
NCURSES_EXPORT(int)
_nc_unicode_locale(void)
{
- int result = 0;
+ static bool initialized = FALSE;
+ static int result = 0;
+
+ if (!initialized) {
#if defined(_NC_WINDOWS) && USE_WIDEC_SUPPORT
- result = 1;
+ result = 1;
#elif HAVE_LANGINFO_CODESET
- char *env = nl_langinfo(CODESET);
- result = !strcmp(env, "UTF-8");
- T(("_nc_unicode_locale(%s) ->%d", env, result));
+ char *env = nl_langinfo(CODESET);
+ result = !strcmp(env, "UTF-8");
+ T(("_nc_unicode_locale(%s) ->%d", env, result));
#else
- char *env = _nc_get_locale();
- if (env != 0) {
- if (strstr(env, ".UTF-8") != 0) {
- result = 1;
- T(("_nc_unicode_locale(%s) ->%d", env, result));
+ char *env = _nc_get_locale();
+ if (env != 0) {
+ if (strstr(env, ".UTF-8") != 0) {
+ result = 1;
+ T(("_nc_unicode_locale(%s) ->%d", env, result));
+ }
}
- }
#endif
+ initialized = TRUE;
+ }
return result;
}
#endif
}
myname = strdup(tname);
-
- if (strlen(myname) > MAX_NAME_SIZE) {
+ if (myname == NULL || strlen(myname) > MAX_NAME_SIZE) {
ret_error(TGETENT_ERR,
- "TERM environment must be <= %d characters.\n",
+ "TERM environment must be 1..%d characters.\n",
MAX_NAME_SIZE,
free(myname));
}
#ifdef USE_TERM_DRIVER
INIT_TERM_DRIVER();
+ /*
+ * _nc_get_driver() will call td_CanHandle() for each driver, and win_driver
+ * needs file descriptor to do the test, so set it before calling.
+ */
+ termp->Filedes = (short) Filedes;
TCB = (TERMINAL_CONTROL_BLOCK *) termp;
code = _nc_globals.term_driver(TCB, myname, errret);
if (code == OK) {
- termp->Filedes = (short) Filedes;
termp->_termname = strdup(myname);
} else {
ret_error1(errret ? *errret : TGETENT_ERR,
set_curterm(termp);
- if (command_character)
+ if (VALID_STRING(command_character))
_nc_tinfo_cmdch(termp, UChar(*command_character));
/*
if (NC_ISATTY(Filedes)) {
NCURSES_SP_NAME(def_shell_mode) (NCURSES_SP_ARG);
NCURSES_SP_NAME(def_prog_mode) (NCURSES_SP_ARG);
- NCURSES_SP_NAME(baudrate)(NCURSES_SP_ARG);
+ NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG);
}
code = OK;
#endif
{
PRESCREEN_LIST *p, *q;
pthread_t id = GetThreadID();
+ _nc_lock_global(screen);
for (p = _nc_prescreen.allocated, q = 0; p != 0; q = p, p = p->next) {
if (p->id == id) {
if (q) {
break;
}
}
+ _nc_unlock_global(screen);
}
#endif /* USE_PTHREADS */
projects / ncurses.git / blobdiff