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/* See LICENSE file for copyright and license details. */
#include "common.h"
static int
construct_codepoint_label(const char *metalabel, uint32_t codepoint, void *buffer, size_t *bufsizep)
{
/* See Unicode Core Spec 4.8.2 Code Point Labels */
size_t req = sizeof("-NNNN") + strlen(metalabel) - 2u * (size_t)(*metalabel == '<');
char *p = buffer;
if (codepoint >> 16) req += 1u;
if (codepoint >> 20) req += 1u;
if (*bufsizep < req) {
*bufsizep = req;
errno = ERANGE;
return -1;
}
p = stpcpy(buffer, &metalabel[*metalabel == '<']);
p -= *metalabel == '<';
*p++ = '-';
if (codepoint >> 20) *p++ = "0123456789ABCDEF"[(codepoint >> 20) & 15u];
if (codepoint >> 16) *p++ = "0123456789ABCDEF"[(codepoint >> 16) & 15u];
*p++ = "0123456789ABCDEF"[(codepoint >> 12) & 15u];
*p++ = "0123456789ABCDEF"[(codepoint >> 8) & 15u];
*p++ = "0123456789ABCDEF"[(codepoint >> 4) & 15u];
*p++ = "0123456789ABCDEF"[(codepoint >> 0) & 15u];
*p = '\0';
return 0;
}
int
libcmap_get_codepoint_data(uint32_t codepoint, struct libcmap_codepoint_data *data_out, void *buffer, size_t *bufsizep)
{
const struct libcmap_codepoint_data *data;
size_t i, namelen;
const char *metalabel;
memset(data_out, 0, sizeof(*data_out));
data_out->name = NULL;
data_out->unicode_1_name = NULL;
data_out->numeric_value = NULL;
data_out->decomposition_mapping = NULL;
if (codepoint > LIBCMAP_ULTIMATE_CODEPOINT)
return 0;
if ((0xFDD0u <= codepoint && codepoint <= 0xFDEFu) || (codepoint & 0xFFFEu) == 0xFFFEu) {
if (data_out) {
if (construct_codepoint_label("noncharacter", codepoint, buffer, bufsizep))
return -1;
data_out->name = buffer;
data_out->general_category = LIBCMAP_GENERAL_CATEGORY_OTHER_NOT_ASSIGNED;
data_out->noncharacter = 1u;
}
return 1;
}
for (i = 0u; i < libcmap_no_data_range_list_size; i++) {
if (codepoint <= libcmap_no_data_range_list[i].last) {
if (libcmap_no_data_range_list[i].first > codepoint)
break;
if (!data_out)
return 1;
data = libcmap_find_codepoint_data(libcmap_no_data_range_list[i].first);
switch ((int)data->general_category) {
case LIBCMAP_GENERAL_CATEGORY_OTHER_CONTROL: metalabel = "control"; goto have_metalabel;
case LIBCMAP_GENERAL_CATEGORY_OTHER_SURROGATE: metalabel = "surrogate"; goto have_metalabel;
case LIBCMAP_GENERAL_CATEGORY_OTHER_PRIVATE_USE: metalabel = "private-use"; goto have_metalabel;
default:
namelen = strlen(data->name);
namelen -= sizeof(", First") - 1u;
if (namelen + 1u > *bufsizep) {
*bufsizep = namelen + 1u;
errno = ERANGE;
return -1;
}
memcpy(buffer, data->name, namelen - 1u);
((char *)buffer)[namelen - 1u] = '>';
((char *)buffer)[namelen] = '\0';
break;
have_metalabel:
if (construct_codepoint_label(metalabel, codepoint, buffer, bufsizep))
return -1;
break;
}
*data_out = *data;
data_out->name = buffer;
return 1;
}
}
data = libcmap_find_codepoint_data(codepoint);
if (!data) {
if (data_out) {
if (construct_codepoint_label("reserved", codepoint, buffer, bufsizep))
return -1;
data_out->name = buffer;
data_out->general_category = LIBCMAP_GENERAL_CATEGORY_OTHER_NOT_ASSIGNED;
data_out->noncharacter = 0u;
}
return 1;
}
if (data_out) {
if (data->name[0u] == '<') {
if (construct_codepoint_label(data->name, codepoint, buffer, bufsizep))
return -1;
*data_out = *data;
data_out->name = buffer;
} else {
*data_out = *data;
}
}
return 1;
}
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