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115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
/* $Id: utf8.c,v 1.1 2008-09-09 22:16:37 nicm Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <string.h>
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#include "tmux.h"
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/*
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* UTF8 data structures. Just crappy array + linear search for now.
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*/
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/* Pack UTF8 index into attr, data. */
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void
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utf8_pack(int idx, u_char *data, u_short *attr)
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{
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*data = idx & 0xff;
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*attr &= ~(ATTR_UTF8b8|ATTR_UTF8b9);
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if (idx & 0x100)
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*attr |= ATTR_UTF8b8;
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if (idx & 0x200)
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*attr |= ATTR_UTF8b9;
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if (idx & 0x400)
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*attr |= ATTR_UTF8b10;
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if (idx & 0x800)
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*attr |= ATTR_UTF8b11;
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}
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/* Unpack UTF8 index from attr, data. */
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int
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utf8_unpack(u_char data, u_short attr)
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{
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int idx;
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idx = data;
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if (attr & ATTR_UTF8b8)
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idx |= 0x100;
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if (attr & ATTR_UTF8b9)
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idx |= 0x200;
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if (attr & ATTR_UTF8b10)
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idx |= 0x400;
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if (attr & ATTR_UTF8b11)
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idx |= 0x800;
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return (idx);
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}
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void
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utf8_init(struct utf8_table *utab, int limit)
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{
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utab->limit = limit;
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ARRAY_INIT(&utab->array);
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}
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void
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utf8_free(struct utf8_table *utab)
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{
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ARRAY_FREE(&utab->array);
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}
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struct utf8_data *
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utf8_lookup(struct utf8_table *utab, int idx)
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{
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if (idx < 0 || idx >= (int) ARRAY_LENGTH(&utab->array))
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return (NULL);
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return (&ARRAY_ITEM(&utab->array, idx));
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}
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int
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utf8_search(struct utf8_table *utab, struct utf8_data *udat)
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{
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u_int idx;
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for (idx = 0; idx < ARRAY_LENGTH(&utab->array); idx++) {
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if (memcmp(udat->data,
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ARRAY_ITEM(&utab->array, idx).data, sizeof udat->data) == 0)
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return (idx);
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}
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return (-1);
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}
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int
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utf8_add(struct utf8_table *utab, struct utf8_data *udat)
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{
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int idx;
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if (ARRAY_LENGTH(&utab->array) == utab->limit)
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return (-1);
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if ((idx = utf8_search(utab, udat)) != -1)
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return (idx);
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ARRAY_EXPAND(&utab->array, 1);
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memcpy(
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&ARRAY_LAST(&utab->array), udat, sizeof ARRAY_LAST(&utab->array));
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return (ARRAY_LENGTH(&utab->array) - 1);
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}
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