diff options
Diffstat (limited to 'ncurses-5.9/ncurses/tinfo/db_iterator.c')
| -rw-r--r-- | ncurses-5.9/ncurses/tinfo/db_iterator.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/ncurses-5.9/ncurses/tinfo/db_iterator.c b/ncurses-5.9/ncurses/tinfo/db_iterator.c new file mode 100644 index 0000000..30fc5d8 --- /dev/null +++ b/ncurses-5.9/ncurses/tinfo/db_iterator.c @@ -0,0 +1,224 @@ +/**************************************************************************** + * Copyright (c) 2006-2007,2010 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 * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Thomas E. Dickey * + ****************************************************************************/ + +/* + * Iterators for terminal databases. + */ + +#include <curses.priv.h> + +#include <tic.h> + +MODULE_ID("$Id$") + +#define HaveTicDirectory _nc_globals.have_tic_directory +#define KeepTicDirectory _nc_globals.keep_tic_directory +#define TicDirectory _nc_globals.tic_directory + +/* + * Record the "official" location of the terminfo directory, according to + * the place where we're writing to, or the normal default, if not. + */ +NCURSES_EXPORT(const char *) +_nc_tic_dir(const char *path) +{ + if (!KeepTicDirectory) { + if (path != 0) { + TicDirectory = path; + HaveTicDirectory = TRUE; + } else if (!HaveTicDirectory && use_terminfo_vars()) { + char *envp; + if ((envp = getenv("TERMINFO")) != 0) + return _nc_tic_dir(envp); + } + } + return TicDirectory; +} + +/* + * Special fix to prevent the terminfo directory from being moved after tic + * has chdir'd to it. If we let it be changed, then if $TERMINFO has a + * relative path, we'll lose track of the actual directory. + */ +NCURSES_EXPORT(void) +_nc_keep_tic_dir(const char *path) +{ + _nc_tic_dir(path); + KeepTicDirectory = TRUE; +} + +/* + * Process the list of :-separated directories, looking for the terminal type. + * We don't use strtok because it does not show us empty tokens. + */ +#define ThisDbList _nc_globals.dbi_list +#define ThisDbSize _nc_globals.dbi_size + +/* + * Cleanup. + */ +NCURSES_EXPORT(void) +_nc_last_db(void) +{ + if (ThisDbList != 0) { + FreeAndNull(ThisDbList); + } + ThisDbSize = 0; +} + +/* The TERMINFO_DIRS value, if defined by the configure script, begins with a + * ":", which will be interpreted as TERMINFO. + */ +static const char * +next_list_item(const char *source, int *offset) +{ + if (source != 0) { + FreeIfNeeded(ThisDbList); + ThisDbList = strdup(source); + ThisDbSize = (int) strlen(source); + } + + if (ThisDbList != 0 && ThisDbSize && *offset < ThisDbSize) { + static char system_db[] = TERMINFO; + char *result = ThisDbList + *offset; + char *marker = strchr(result, NCURSES_PATHSEP); + + /* + * Put a null on the marker if a separator was found. Set the offset + * to the next position after the marker so we can call this function + * again, using the data at the offset. + */ + if (marker == 0) { + *offset += (int) strlen(result); + } else { + *marker++ = 0; + *offset = (int) (marker - ThisDbList); + } + if (*result == 0 && result != (ThisDbList + ThisDbSize)) + result = system_db; + return result; + } + return 0; +} + +#define NEXT_DBD(var, offset) next_list_item((*offset == 0) ? var : 0, offset) + +/* + * This is a simple iterator which allows the caller to step through the + * possible locations for a terminfo directory. ncurses uses this to find + * terminfo files to read. + */ +NCURSES_EXPORT(const char *) +_nc_next_db(DBDIRS * state, int *offset) +{ + const char *result; + char *envp; + + while (*state < dbdLAST) { + DBDIRS next = (DBDIRS) ((int) (*state) + 1); + + result = 0; + + switch (*state) { + case dbdTIC: + if (HaveTicDirectory) + result = _nc_tic_dir(0); + break; +#if USE_DATABASE + case dbdEnvOnce: + if (use_terminfo_vars()) { + if ((envp = getenv("TERMINFO")) != 0) + result = _nc_tic_dir(envp); + } + break; + case dbdHome: + if (use_terminfo_vars()) { + result = _nc_home_terminfo(); + } + break; + case dbdEnvList: + if (use_terminfo_vars()) { + if ((result = NEXT_DBD(getenv("TERMINFO_DIRS"), offset)) != 0) + next = *state; + } + break; + case dbdCfgList: +#ifdef TERMINFO_DIRS + if ((result = NEXT_DBD(TERMINFO_DIRS, offset)) != 0) + next = *state; +#endif + break; + case dbdCfgOnce: +#ifndef TERMINFO_DIRS + result = TERMINFO; +#endif + break; +#endif /* USE_DATABASE */ +#if USE_TERMCAP + case dbdEnvOnce2: + if (use_terminfo_vars()) { + if ((envp = getenv("TERMCAP")) != 0) + result = _nc_tic_dir(envp); + } + break; + case dbdEnvList2: + if (use_terminfo_vars()) { + if ((result = NEXT_DBD(getenv("TERMPATH"), offset)) != 0) + next = *state; + } + break; + case dbdCfgList2: + if ((result = NEXT_DBD(TERMPATH, offset)) != 0) + next = *state; + break; +#endif /* USE_TERMCAP */ + case dbdLAST: + break; + } + if (*state != next) { + *state = next; + *offset = 0; + _nc_last_db(); + } + if (result != 0) { + return result; + } + } + return 0; +} + +NCURSES_EXPORT(void) +_nc_first_db(DBDIRS * state, int *offset) +{ + *state = dbdTIC; + *offset = 0; +} |