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https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2026-04-25 06:46:40 -04:00
f2c4452e8d
Also change the encoding of the byte array to use hexadecimal encoding, i.e. the byte array [100, 200] in becomes "64c8".
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2026 Red Hat */
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/* SPDX-License-Identifier: MIT */
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static inline char *
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encode_hex(const uint8_t *data, size_t size)
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{
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FILE *ms;
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char *encoded = NULL;
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size_t encoded_size = 0;
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size_t i;
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ms = open_memstream(&encoded, &encoded_size);
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for (i = 0; i < size; i++) {
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fprintf(ms, "%02x", data[i]);
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}
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fclose(ms);
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return encoded;
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}
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static inline int8_t
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ascii_hex_to_hex(uint8_t ascii_hex)
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{
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if (ascii_hex >= '0' && ascii_hex <= '9')
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return ascii_hex - '0';
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else if (ascii_hex >= 'a' && ascii_hex <= 'f')
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return ascii_hex - 'a' + 10;
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else if (ascii_hex >= 'A' && ascii_hex <= 'F')
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return ascii_hex - 'A' + 10;
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else
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return -1;
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}
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static inline int
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decode_hex(const char *encoded, uint8_t *data, size_t size)
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{
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size_t length;
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size_t i;
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length = strlen(encoded);
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if (size < (length / 2) * sizeof(uint8_t))
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return -1;
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i = 0;
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while (i < length) {
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int8_t top = ascii_hex_to_hex(encoded[i]);
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int8_t bottom = ascii_hex_to_hex(encoded[i + 1]);
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if (top == -1 || bottom == -1)
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return -1;
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uint8_t el = top << 4 | bottom;
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data[i / 2] = el;
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i += 2;
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}
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return 1;
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}
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