From e578c50ffbd02f2f7b9116b6b9eb096bb1fcee60 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sun, 18 Oct 2026 05:55:18 +0200 Subject: Misc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- characters.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 characters.c (limited to 'characters.c') diff --git a/characters.c b/characters.c new file mode 100644 index 0000000..5679918 --- /dev/null +++ b/characters.c @@ -0,0 +1,80 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +int +is_noncharacter(uint32_t cp) +{ + return (0xFDD0u <= cp && cp <= 0xFDEFu) || (cp & 0xFFFEu) == 0xFFFEu; +} + + +int +is_surrogate(uint32_t cp) +{ + return 0xD800u <= cp && cp <= 0xDFFFu; +} + + +int +is_valid_codepoint(uint32_t cp) +{ + return cp <= LIBCMAP_ULTIMATE_CODEPOINT && !is_noncharacter(cp) && !is_surrogate(cp); +} + + +struct libcmap_codepoint_data * +get_codepoint_data(uint32_t cp) +{ + static char *databuf = NULL; + static size_t databufsize = 0u; + static struct libcmap_codepoint_data data; + + int r; + +again: + r = libcmap_get_codepoint_data(cp, &data, databuf, &databufsize); + if (r <= 0) { + if (!r || errno != ERANGE || !databufsize) + return NULL; + databuf = erealloc(databuf, databufsize); + goto again; + } + + return &data; +} + + +enum codepoint_class +classify_from_codepoint_data(const struct libcmap_codepoint_data *data) +{ + if (!data) + return CP_OUT_OF_RANGE; + + switch ((int)(data->general_category & LIBCMAP_GENERAL_SUPERCATEGORY_MASK)) { + case LIBCMAP_GENERAL_SUPERCATEGORY_MARK: + return CP_COMBINING_MARK; + default: + break; + } + + switch ((int)data->general_category) { + case LIBCMAP_GENERAL_CATEGORY_OTHER_CONTROL: + return CP_CONTROL; + case LIBCMAP_GENERAL_CATEGORY_OTHER_SURROGATE: + return CP_SURROGATE; + case LIBCMAP_GENERAL_CATEGORY_OTHER_NOT_ASSIGNED: + return data->noncharacter ? CP_NONCHARACTER : CP_RESERVED; + default: + break; + } + + return CP_REGULAR; +} + + +enum codepoint_class +classify_codepoint(uint32_t cp) +{ + return classify_from_codepoint_data(get_codepoint_data(cp)); +} -- cgit v1.3.1