53bf5c497f
- Add LICENSES directory - Download additional licenses used - Add .reuse directory - Add doc about SPDX/reuse Co-authored-by: Florian Märkl <info@florianmaerkl.de>
46 lines
1 KiB
C
46 lines
1 KiB
C
// SPDX-FileCopyrightText: 2017 kazarmy <kazarmy@gmail.com>
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// SPDX-License-Identifier: LGPL-3.0-only
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#include <rz_types.h>
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#include <rz_util.h>
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/* Convert an UTF-32 buf into a unicode RzRune */
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RZ_API int rz_utf32_decode(const ut8 *ptr, int ptrlen, RzRune *ch, bool bigendian) {
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if (ptrlen < 1) {
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return 0;
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}
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int low = 0;
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int high = 3;
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if (bigendian) {
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low = 3;
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high = 0;
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}
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if (ptrlen > 3) {
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int sign = bigendian ? -1 : 1;
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if (ch) {
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int i;
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*ch = (ut32)ptr[low];
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for (i = 1; i < 4; i++) {
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*ch |= (ut32)ptr[3 - high + i * sign] << 8 * i;
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}
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}
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if (ptr[high] || ptr[high - 1 * sign]) {
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return 4;
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}
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if (ptr[low + 1 * sign]) {
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return 2;
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}
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return 1;
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}
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return 0;
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}
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/* Convert an UTF-32LE buf into a unicode RzRune */
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RZ_API int rz_utf32le_decode(const ut8 *ptr, int ptrlen, RzRune *ch) {
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return rz_utf32_decode(ptr, ptrlen, ch, false);
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}
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/* Convert an UTF-32BE buf into a unicode RzRune */
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RZ_API int rz_utf32be_decode(const ut8 *ptr, int ptrlen, RzRune *ch) {
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return rz_utf32_decode(ptr, ptrlen, ch, true);
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}
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