diff options
Diffstat (limited to 'grid-utf8.c')
-rw-r--r-- | grid-utf8.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/grid-utf8.c b/grid-utf8.c new file mode 100644 index 00000000..5e5cad74 --- /dev/null +++ b/grid-utf8.c @@ -0,0 +1,96 @@ +/* $OpenBSD$ */ + +/* + * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net> + * + * 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 <sys/types.h> + +#include <string.h> + +#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); +} |