/* $Id: grid-utf8.c,v 1.1.1.2 2011/08/17 18:40:04 jmmv Exp $ */ /* * Copyright (c) 2009 Nicholas Marriott * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include "tmux.h" /* * Grid UTF-8 utility functions. */ /* Calculate UTF-8 grid cell size. Data is terminated by 0xff. */ size_t grid_utf8_size(const struct grid_utf8 *gu) { size_t size; for (size = 0; size < sizeof gu->data; size++) { if (gu->data[size] == 0xff) break; } return (size); } /* Copy UTF-8 out into a buffer. */ size_t grid_utf8_copy(const struct grid_utf8 *gu, char *buf, size_t len) { size_t size; size = grid_utf8_size(gu); if (size > len) fatalx("UTF-8 copy overflow"); memcpy(buf, gu->data, size); return (size); } /* Set UTF-8 grid data from input UTF-8. */ void grid_utf8_set(struct grid_utf8 *gu, const struct utf8_data *utf8data) { if (utf8data->size == 0) fatalx("UTF-8 data empty"); if (utf8data->size > sizeof gu->data) fatalx("UTF-8 data too long"); memcpy(gu->data, utf8data->data, utf8data->size); if (utf8data->size != sizeof gu->data) gu->data[utf8data->size] = 0xff; gu->width = utf8data->width; } /* Append UTF-8 character onto the cell data (for combined characters). */ int grid_utf8_append(struct grid_utf8 *gu, const struct utf8_data *utf8data) { size_t old_size; old_size = grid_utf8_size(gu); if (old_size + utf8data->size > sizeof gu->data) return (-1); memcpy(gu->data + old_size, utf8data->data, utf8data->size); if (old_size + utf8data->size != sizeof gu->data) gu->data[old_size + utf8data->size] = 0xff; return (0); } /* Compare two UTF-8 cells. */ int grid_utf8_compare(const struct grid_utf8 *gu1, const struct grid_utf8 *gu2) { size_t size; size = grid_utf8_size(gu1); if (size != grid_utf8_size(gu2)) return (0); if (memcmp(gu1->data, gu2->data, size) != 0) return (0); return (1); }