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/*
Copyright 2022-2023 Gabriel Jensen.
This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
If a copy of the MPL was not distributed with this file, You can obtain one at <https://mozilla.org/MPL/2.0>.
*/
#include <zap/mem.h>
void zap_utf8enc(zap_i8 * const _dest,zap_i02 const * const _src) {
zap_i8 * dest;
zap_i02 const * src;
for (dest = _dest,src = _src;;++src) {
zap_i02 const chr = *src;
if (chr > 0xFFFFu) { /* Four octets. */
*dest = 0xF0u + (chr >> 0x12u);
++dest;
*dest = 0x80u + (chr >> 0xCu & 0x3Fu);
++dest;
*dest = 0x80u + (chr >> 0x6u & 0x3Fu);
++dest;
*dest = 0x80u + (chr & 0x3Fu);
++dest;
continue;
}
if (chr >= 0x7FFu) { /* Three octets. */
*dest = 0xE0u + (zap_i8)(chr >> 0xCu);
++dest;
*dest = 0x80u + (zap_i8)(chr >> 0x6u & 0x3Fu);
++dest;
*dest = 0x80u + (zap_i8)(chr & 0x3Fu);
++dest;
continue;
}
if (chr >= 0x7Fu) { /* Two octets. */
*dest = 0xC0u + (zap_i8)(chr >> 0x6u);
++dest;
*dest = 0x80u + (zap_i8)(chr & 0x3Fu);
++dest;
continue;
}
/* One octet. */
*dest = chr;
++dest;
if (chr == 0x0u) {
break;
}
}
}
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