mirror of https://github.com/tmux/tmux.git
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/* $Id$ */
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/*
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* Copyright (c) 2009 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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* Grid UTF-8 utility functions.
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*/
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/* Calculate UTF-8 grid cell size. Data is terminated by 0xff. */
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size_t
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grid_utf8_size(const struct grid_utf8 *gu)
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{
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size_t size;
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for (size = 0; size < sizeof gu->data; size++) {
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if (gu->data[size] == 0xff)
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break;
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}
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return (size);
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}
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/* Copy UTF-8 out into a buffer. */
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size_t
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grid_utf8_copy(const struct grid_utf8 *gu, char *buf, size_t len)
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{
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size_t size;
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size = grid_utf8_size(gu);
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if (size > len)
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fatalx("UTF-8 copy overflow");
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memcpy(buf, gu->data, size);
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return (size);
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}
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/* Set UTF-8 grid data from input UTF-8. */
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void
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grid_utf8_set(struct grid_utf8 *gu, const struct utf8_data *utf8data)
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{
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if (utf8data->size == 0)
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fatalx("UTF-8 data empty");
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if (utf8data->size > sizeof gu->data)
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fatalx("UTF-8 data too long");
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memcpy(gu->data, utf8data->data, utf8data->size);
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if (utf8data->size != sizeof gu->data)
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gu->data[utf8data->size] = 0xff;
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gu->width = utf8data->width;
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}
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/* Append UTF-8 character onto the cell data (for combined characters). */
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int
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grid_utf8_append(struct grid_utf8 *gu, const struct utf8_data *utf8data)
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{
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size_t old_size;
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old_size = grid_utf8_size(gu);
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if (old_size + utf8data->size > sizeof gu->data)
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return (-1);
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memcpy(gu->data + old_size, utf8data->data, utf8data->size);
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if (old_size + utf8data->size != sizeof gu->data)
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gu->data[old_size + utf8data->size] = 0xff;
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return (0);
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}
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/* Compare two UTF-8 cells. */
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int
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grid_utf8_compare(const struct grid_utf8 *gu1, const struct grid_utf8 *gu2)
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{
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size_t size;
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size = grid_utf8_size(gu1);
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if (size != grid_utf8_size(gu2))
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return (0);
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if (memcmp(gu1->data, gu2->data, size) != 0)
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return (0);
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return (1);
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}
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