diff options
Diffstat (limited to 'ncurses/tinfo/add_tries.c')
-rw-r--r-- | ncurses/tinfo/add_tries.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/ncurses/tinfo/add_tries.c b/ncurses/tinfo/add_tries.c new file mode 100644 index 000000000000..455d142edc8e --- /dev/null +++ b/ncurses/tinfo/add_tries.c @@ -0,0 +1,120 @@ +/**************************************************************************** + * Copyright (c) 1998-2005,2006 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 1998-on * + ****************************************************************************/ + +/* +** add_tries.c +** +** Add keycode/string to tries-tree. +** +*/ + +#include <curses.priv.h> + +MODULE_ID("$Id: add_tries.c,v 1.8 2006/12/30 23:15:26 tom Exp $") + +#define SET_TRY(dst,src) if ((dst->ch = *src++) == 128) dst->ch = '\0' +#define CMP_TRY(a,b) ((a)? (a == b) : (b == 128)) + +NCURSES_EXPORT(int) +_nc_add_to_try(TRIES ** tree, const char *str, unsigned code) +{ + TRIES *ptr, *savedptr; + unsigned const char *txt = (unsigned const char *) str; + + T((T_CALLED("_nc_add_to_try(%p, %s, %u)"), *tree, _nc_visbuf(str), code)); + if (txt == 0 || *txt == '\0' || code == 0) + returnCode(ERR); + + if ((*tree) != 0) { + ptr = savedptr = (*tree); + + for (;;) { + unsigned char cmp = *txt; + + while (!CMP_TRY(ptr->ch, cmp) + && ptr->sibling != 0) + ptr = ptr->sibling; + + if (CMP_TRY(ptr->ch, cmp)) { + if (*(++txt) == '\0') { + ptr->value = code; + returnCode(OK); + } + if (ptr->child != 0) + ptr = ptr->child; + else + break; + } else { + if ((ptr->sibling = typeCalloc(TRIES, 1)) == 0) { + returnCode(ERR); + } + + savedptr = ptr = ptr->sibling; + SET_TRY(ptr, txt); + ptr->value = 0; + + break; + } + } /* end for (;;) */ + } else { /* (*tree) == 0 :: First sequence to be added */ + savedptr = ptr = (*tree) = typeCalloc(TRIES, 1); + + if (ptr == 0) { + returnCode(ERR); + } + + SET_TRY(ptr, txt); + ptr->value = 0; + } + + /* at this point, we are adding to the try. ptr->child == 0 */ + + while (*txt) { + ptr->child = typeCalloc(TRIES, 1); + + ptr = ptr->child; + + if (ptr == 0) { + while ((ptr = savedptr) != 0) { + savedptr = ptr->child; + free(ptr); + } + returnCode(ERR); + } + + SET_TRY(ptr, txt); + ptr->value = 0; + } + + ptr->value = code; + returnCode(OK); +} |