diff options
Diffstat (limited to 'ncurses-5.9/ncurses/tinfo/alloc_entry.c')
-rw-r--r-- | ncurses-5.9/ncurses/tinfo/alloc_entry.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/ncurses-5.9/ncurses/tinfo/alloc_entry.c b/ncurses-5.9/ncurses/tinfo/alloc_entry.c new file mode 100644 index 0000000..8241874 --- /dev/null +++ b/ncurses-5.9/ncurses/tinfo/alloc_entry.c @@ -0,0 +1,300 @@ +/**************************************************************************** + * Copyright (c) 1998-2008,2010 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * + * and: Eric S. Raymond <esr@snark.thyrsus.com> * + * and: Thomas E. Dickey 1996-on * + ****************************************************************************/ + +/* + * alloc_entry.c -- allocation functions for terminfo entries + * + * _nc_copy_entry() + * _nc_init_entry() + * _nc_merge_entry() + * _nc_save_str() + * _nc_wrap_entry() + * + */ + +#include <curses.priv.h> + +#include <tic.h> + +MODULE_ID("$Id$") + +#define ABSENT_OFFSET -1 +#define CANCELLED_OFFSET -2 + +#define MAX_STRTAB 4096 /* documented maximum entry size */ + +static char *stringbuf; /* buffer for string capabilities */ +static size_t next_free; /* next free character in stringbuf */ + +NCURSES_EXPORT(void) +_nc_init_entry(TERMTYPE *const tp) +/* initialize a terminal type data block */ +{ + unsigned i; + +#if NO_LEAKS + if (tp == 0) { + if (stringbuf != 0) { + FreeAndNull(stringbuf); + } + return; + } +#endif + + if (stringbuf == 0) + stringbuf = (char *) malloc(MAX_STRTAB); + +#if NCURSES_XNAMES + tp->num_Booleans = BOOLCOUNT; + tp->num_Numbers = NUMCOUNT; + tp->num_Strings = STRCOUNT; + tp->ext_Booleans = 0; + tp->ext_Numbers = 0; + tp->ext_Strings = 0; +#endif + if (tp->Booleans == 0) + tp->Booleans = typeMalloc(NCURSES_SBOOL, BOOLCOUNT); + if (tp->Numbers == 0) + tp->Numbers = typeMalloc(short, NUMCOUNT); + if (tp->Strings == 0) + tp->Strings = typeMalloc(char *, STRCOUNT); + + for_each_boolean(i, tp) + tp->Booleans[i] = FALSE; + + for_each_number(i, tp) + tp->Numbers[i] = ABSENT_NUMERIC; + + for_each_string(i, tp) + tp->Strings[i] = ABSENT_STRING; + + next_free = 0; +} + +NCURSES_EXPORT(ENTRY *) +_nc_copy_entry(ENTRY * oldp) +{ + ENTRY *newp = typeCalloc(ENTRY, 1); + + if (newp != 0) { + *newp = *oldp; + _nc_copy_termtype(&(newp->tterm), &(oldp->tterm)); + } + return newp; +} + +/* save a copy of string in the string buffer */ +NCURSES_EXPORT(char *) +_nc_save_str(const char *const string) +{ + char *result = 0; + size_t old_next_free = next_free; + size_t len = strlen(string) + 1; + + if (len == 1 && next_free != 0) { + /* + * Cheat a little by making an empty string point to the end of the + * previous string. + */ + if (next_free < MAX_STRTAB) { + result = (stringbuf + next_free - 1); + } + } else if (next_free + len < MAX_STRTAB) { + strcpy(&stringbuf[next_free], string); + DEBUG(7, ("Saved string %s", _nc_visbuf(string))); + DEBUG(7, ("at location %d", (int) next_free)); + next_free += len; + result = (stringbuf + old_next_free); + } else { + _nc_warning("Too much data, some is lost"); + } + return result; +} + +NCURSES_EXPORT(void) +_nc_wrap_entry(ENTRY * const ep, bool copy_strings) +/* copy the string parts to allocated storage, preserving pointers to it */ +{ + int offsets[MAX_ENTRY_SIZE / sizeof(short)]; + int useoffsets[MAX_USES]; + unsigned i, n; + unsigned nuses = ep->nuses; + TERMTYPE *tp = &(ep->tterm); + + if (copy_strings) { + next_free = 0; /* clear static storage */ + + /* copy term_names, Strings, uses */ + tp->term_names = _nc_save_str(tp->term_names); + for_each_string(i, tp) { + if (tp->Strings[i] != ABSENT_STRING && + tp->Strings[i] != CANCELLED_STRING) { + tp->Strings[i] = _nc_save_str(tp->Strings[i]); + } + } + + for (i = 0; i < nuses; i++) { + if (ep->uses[i].name == 0) { + ep->uses[i].name = _nc_save_str(ep->uses[i].name); + } + } + + free(tp->str_table); + } + + assert(tp->term_names >= stringbuf); + n = (unsigned) (tp->term_names - stringbuf); + for_each_string(i, &(ep->tterm)) { + if (i < SIZEOF(offsets)) { + if (tp->Strings[i] == ABSENT_STRING) { + offsets[i] = ABSENT_OFFSET; + } else if (tp->Strings[i] == CANCELLED_STRING) { + offsets[i] = CANCELLED_OFFSET; + } else { + offsets[i] = (int) (tp->Strings[i] - stringbuf); + } + } + } + + for (i = 0; i < nuses; i++) { + if (ep->uses[i].name == 0) + useoffsets[i] = ABSENT_OFFSET; + else + useoffsets[i] = (int) (ep->uses[i].name - stringbuf); + } + + if ((tp->str_table = typeMalloc(char, next_free)) == (char *) 0) + _nc_err_abort(MSG_NO_MEMORY); + (void) memcpy(tp->str_table, stringbuf, next_free); + + tp->term_names = tp->str_table + n; + for_each_string(i, &(ep->tterm)) { + if (i < SIZEOF(offsets)) { + if (offsets[i] == ABSENT_OFFSET) { + tp->Strings[i] = ABSENT_STRING; + } else if (offsets[i] == CANCELLED_OFFSET) { + tp->Strings[i] = CANCELLED_STRING; + } else { + tp->Strings[i] = tp->str_table + offsets[i]; + } + } + } + +#if NCURSES_XNAMES + if (!copy_strings) { + if ((n = (unsigned) NUM_EXT_NAMES(tp)) != 0) { + if (n < SIZEOF(offsets)) { + size_t length = 0; + for (i = 0; i < n; i++) { + length += strlen(tp->ext_Names[i]) + 1; + offsets[i] = (int) (tp->ext_Names[i] - stringbuf); + } + if ((tp->ext_str_table = typeMalloc(char, length)) == 0) + _nc_err_abort(MSG_NO_MEMORY); + for (i = 0, length = 0; i < n; i++) { + tp->ext_Names[i] = tp->ext_str_table + length; + strcpy(tp->ext_Names[i], stringbuf + offsets[i]); + length += strlen(tp->ext_Names[i]) + 1; + } + } + } + } +#endif + + for (i = 0; i < nuses; i++) { + if (useoffsets[i] == ABSENT_OFFSET) + ep->uses[i].name = 0; + else + ep->uses[i].name = (tp->str_table + useoffsets[i]); + } +} + +NCURSES_EXPORT(void) +_nc_merge_entry(TERMTYPE *const to, TERMTYPE *const from) +/* merge capabilities from `from' entry into `to' entry */ +{ + unsigned i; + +#if NCURSES_XNAMES + _nc_align_termtype(to, from); +#endif + for_each_boolean(i, from) { + if (to->Booleans[i] != (char) CANCELLED_BOOLEAN) { + int mergebool = from->Booleans[i]; + + if (mergebool == CANCELLED_BOOLEAN) + to->Booleans[i] = FALSE; + else if (mergebool == TRUE) + to->Booleans[i] = (char) mergebool; + } + } + + for_each_number(i, from) { + if (to->Numbers[i] != CANCELLED_NUMERIC) { + short mergenum = from->Numbers[i]; + + if (mergenum == CANCELLED_NUMERIC) + to->Numbers[i] = ABSENT_NUMERIC; + else if (mergenum != ABSENT_NUMERIC) + to->Numbers[i] = mergenum; + } + } + + /* + * Note: the copies of strings this makes don't have their own + * storage. This is OK right now, but will be a problem if we + * we ever want to deallocate entries. + */ + for_each_string(i, from) { + if (to->Strings[i] != CANCELLED_STRING) { + char *mergestring = from->Strings[i]; + + if (mergestring == CANCELLED_STRING) + to->Strings[i] = ABSENT_STRING; + else if (mergestring != ABSENT_STRING) + to->Strings[i] = mergestring; + } + } +} + +#if NO_LEAKS +NCURSES_EXPORT(void) +_nc_alloc_entry_leaks(void) +{ + if (stringbuf != 0) { + FreeAndNull(stringbuf); + } + next_free = 0; +} +#endif |