ncurses 6.1 - patch 20181215
[ncurses.git] / ncurses / tinfo / lib_setup.c
index 93a42a04a3aabc2f0188f0af5bdfd69c1c1e3cf7..b43aa9528a1e8bee44f93a7c46801506eaa8a716 100644 (file)
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc.              *
+ * Copyright (c) 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            *
@@ -48,7 +48,7 @@
 #include <locale.h>
 #endif
 
-MODULE_ID("$Id: lib_setup.c,v 1.182 2017/06/17 22:21:50 tom Exp $")
+MODULE_ID("$Id: lib_setup.c,v 1.197 2018/11/24 22:13:16 tom Exp $")
 
 /****************************************************************************
  *
@@ -543,9 +543,9 @@ _nc_get_locale(void)
      */
     env = setlocale(LC_CTYPE, 0);
 #else
-    if (((env = getenv("LC_ALL")) != 0 && *env != '\0')
+    if (((env = getenv("LANG")) != 0 && *env != '\0')
        || ((env = getenv("LC_CTYPE")) != 0 && *env != '\0')
-       || ((env = getenv("LANG")) != 0 && *env != '\0')) {
+       || ((env = getenv("LC_ALL")) != 0 && *env != '\0')) {
        ;
     }
 #endif
@@ -560,7 +560,7 @@ NCURSES_EXPORT(int)
 _nc_unicode_locale(void)
 {
     int result = 0;
-#if defined(__MINGW32__) && USE_WIDEC_SUPPORT
+#if defined(_WIN32) && USE_WIDEC_SUPPORT
     result = 1;
 #elif HAVE_LANGINFO_CODESET
     char *env = nl_langinfo(CODESET);
@@ -618,7 +618,7 @@ _nc_locale_breaks_acs(TERMINAL *termp)
 
 NCURSES_EXPORT(int)
 TINFO_SETUP_TERM(TERMINAL **tp,
-                NCURSES_CONST char *tname,
+                const char *tname,
                 int Filedes,
                 int *errret,
                 int reuse)
@@ -702,8 +702,9 @@ TINFO_SETUP_TERM(TERMINAL **tp,
     } else {
 #ifdef USE_TERM_DRIVER
        TERMINAL_CONTROL_BLOCK *my_tcb;
-       my_tcb = typeCalloc(TERMINAL_CONTROL_BLOCK, 1);
-       termp = &(my_tcb->term);
+       termp = 0;
+       if ((my_tcb = typeCalloc(TERMINAL_CONTROL_BLOCK, 1)) != 0)
+           termp = &(my_tcb->term);
 #else
        int status;
 
@@ -713,6 +714,24 @@ TINFO_SETUP_TERM(TERMINAL **tp,
            ret_error0(TGETENT_ERR,
                       "Not enough memory to create terminal structure.\n");
        }
+#if HAVE_SYSCONF
+       {
+           long limit;
+#ifdef LINE_MAX
+           limit = LINE_MAX;
+#else
+           limit = _nc_globals.getstr_limit;
+#endif
+#ifdef _SC_LINE_MAX
+           if (limit < sysconf(_SC_LINE_MAX))
+               limit = sysconf(_SC_LINE_MAX);
+#endif
+           if (_nc_globals.getstr_limit < (int) limit)
+               _nc_globals.getstr_limit = (int) limit;
+       }
+#endif /* HAVE_SYSCONF */
+       T(("using %d for getstr limit", _nc_globals.getstr_limit));
+
 #ifdef USE_TERM_DRIVER
        INIT_TERM_DRIVER();
        TCB = (TERMINAL_CONTROL_BLOCK *) termp;
@@ -721,15 +740,15 @@ TINFO_SETUP_TERM(TERMINAL **tp,
            termp->Filedes = (short) Filedes;
            termp->_termname = strdup(tname);
        } else {
-           _nc_free_termtype2(&TerminalType(termp));
-           free(my_tcb);
            ret_error0(errret ? *errret : TGETENT_ERR,
                       "Could not find any driver to handle this terminal.\n");
        }
 #else
 #if NCURSES_USE_DATABASE || NCURSES_USE_TERMCAP
        status = _nc_setup_tinfo(tname, &TerminalType(termp));
+       T(("_nc_setup_tinfo returns %d", status));
 #else
+       T(("no database available"));
        status = TGETENT_NO;
 #endif
 
@@ -738,6 +757,7 @@ TINFO_SETUP_TERM(TERMINAL **tp,
            const TERMTYPE2 *fallback = _nc_fallback2(tname);
 
            if (fallback) {
+               T(("found fallback entry"));
                TerminalType(termp) = *fallback;
                status = TGETENT_YES;
            }
@@ -746,10 +766,8 @@ TINFO_SETUP_TERM(TERMINAL **tp,
        if (status != TGETENT_YES) {
            del_curterm(termp);
            if (status == TGETENT_ERR) {
-               _nc_free_termtype2(&TerminalType(termp));
                ret_error0(status, "terminals database is inaccessible\n");
            } else if (status == TGETENT_NO) {
-               _nc_free_termtype2(&TerminalType(termp));
                ret_error1(status, "unknown terminal type.\n", tname);
            }
        }
@@ -820,6 +838,50 @@ TINFO_SETUP_TERM(TERMINAL **tp,
     returnCode(code);
 }
 
+#ifdef USE_PTHREADS
+/*
+ * Returns a non-null pointer unless a new screen should be allocated because
+ * no match was found in the pre-screen cache.
+ */
+NCURSES_EXPORT(SCREEN *)
+_nc_find_prescr(void)
+{
+    SCREEN *result = 0;
+    PRESCREEN_LIST *p;
+    pthread_t id = GetThreadID();
+    for (p = _nc_prescreen.allocated; p != 0; p = p->next) {
+       if (p->id == id) {
+           result = p->sp;
+           break;
+       }
+    }
+    return result;
+}
+
+/*
+ * Tells ncurses to forget that this thread was associated with the pre-screen
+ * cache.  It does not modify the pre-screen cache itself, since that is used
+ * for creating new screens.
+ */
+NCURSES_EXPORT(void)
+_nc_forget_prescr(void)
+{
+    PRESCREEN_LIST *p, *q;
+    pthread_t id = GetThreadID();
+    for (p = _nc_prescreen.allocated, q = 0; p != 0; q = p, p = p->next) {
+       if (p->id == id) {
+           if (q) {
+               q->next = p->next;
+           } else {
+               _nc_prescreen.allocated = p->next;
+           }
+           free(p);
+           break;
+       }
+    }
+}
+#endif /* USE_PTHREADS */
+
 #if NCURSES_SP_FUNCS
 /*
  * In case of handling multiple screens, we need to have a screen before
@@ -835,25 +897,41 @@ new_prescr(void)
     START_TRACE();
     T((T_CALLED("new_prescr()")));
 
-    sp = _nc_alloc_screen_sp();
-    T(("_nc_alloc_screen_sp %p", (void *) sp));
-    if (sp != 0) {
-       _nc_prescreen.allocated = sp;
-       sp->rsp = sp->rippedoff;
-       sp->_filtered = _nc_prescreen.filter_mode;
-       sp->_use_env = _nc_prescreen.use_env;
+    _nc_lock_global(screen);
+    if ((sp = _nc_find_prescr()) == 0) {
+       sp = _nc_alloc_screen_sp();
+       T(("_nc_alloc_screen_sp %p", (void *) sp));
+       if (sp != 0) {
+#ifdef USE_PTHREADS
+           PRESCREEN_LIST *p = typeCalloc(PRESCREEN_LIST, 1);
+           if (p != 0) {
+               p->id = GetThreadID();
+               p->sp = sp;
+               p->next = _nc_prescreen.allocated;
+               _nc_prescreen.allocated = p;
+           }
+#else
+           _nc_prescreen.allocated = sp;
+#endif
+           sp->rsp = sp->rippedoff;
+           sp->_filtered = _nc_prescreen.filter_mode;
+           sp->_use_env = _nc_prescreen.use_env;
 #if NCURSES_NO_PADDING
-       sp->_no_padding = _nc_prescreen._no_padding;
+           sp->_no_padding = _nc_prescreen._no_padding;
 #endif
-       sp->slk_format = 0;
-       sp->_slk = 0;
-       sp->_prescreen = TRUE;
-       SP_PRE_INIT(sp);
+           sp->slk_format = 0;
+           sp->_slk = 0;
+           sp->_prescreen = TRUE;
+           SP_PRE_INIT(sp);
 #if USE_REENTRANT
-       sp->_TABSIZE = _nc_prescreen._TABSIZE;
-       sp->_ESCDELAY = _nc_prescreen._ESCDELAY;
+           sp->_TABSIZE = _nc_prescreen._TABSIZE;
+           sp->_ESCDELAY = _nc_prescreen._ESCDELAY;
 #endif
+       }
+    } else {
+       T(("_nc_alloc_screen_sp %p (reuse)", (void *) sp));
     }
+    _nc_unlock_global(screen);
     returnSP(sp);
 }
 #endif
@@ -864,17 +942,24 @@ new_prescr(void)
  * the same TERMINAL data (see comment).
  */
 NCURSES_EXPORT(int)
-_nc_setupterm(NCURSES_CONST char *tname,
+_nc_setupterm(const char *tname,
              int Filedes,
              int *errret,
              int reuse)
 {
-    int res;
+    int rc = ERR;
     TERMINAL *termp = 0;
-    res = TINFO_SETUP_TERM(&termp, tname, Filedes, errret, reuse);
-    if (ERR != res)
-       NCURSES_SP_NAME(set_curterm) (CURRENT_SCREEN_PRE, termp);
-    return res;
+
+    _nc_lock_global(prescreen);
+    START_TRACE();
+    if (TINFO_SETUP_TERM(&termp, tname, Filedes, errret, reuse) == OK) {
+       _nc_forget_prescr();
+       if (NCURSES_SP_NAME(set_curterm) (CURRENT_SCREEN_PRE, termp) != 0) {
+           rc = OK;
+       }
+    }
+    _nc_unlock_global(prescreen);
+    return rc;
 }
 #endif
 
@@ -885,7 +970,7 @@ _nc_setupterm(NCURSES_CONST char *tname,
  *     Make cur_term point to the structure.
  */
 NCURSES_EXPORT(int)
-setupterm(NCURSES_CONST char *tname, int Filedes, int *errret)
+setupterm(const char *tname, int Filedes, int *errret)
 {
     START_TRACE();
     return _nc_setupterm(tname, Filedes, errret, FALSE);