45 lines
778 B
C
45 lines
778 B
C
//
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// Created by lobo on 2/5/26.
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//
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#include "sleb128.h"
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intptr_t growl_sleb128_decode(uint8_t **ptr) {
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intptr_t result = 0;
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intptr_t shift = 0;
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uint8_t byte;
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do {
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byte = **ptr;
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(*ptr)++;
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result |= (intptr_t)(byte & 0x7F) << shift;
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shift += 7;
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} while (byte & 0x80);
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if ((shift < 64) && (byte & 0x40)) {
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result |= -(1LL << shift);
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}
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return result;
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}
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size_t growl_sleb128_peek(const uint8_t *ptr, intptr_t *out) {
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intptr_t result = 0, shift = 0;
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size_t bytes = 0;
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uint8_t byte;
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do {
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byte = ptr[bytes];
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bytes++;
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result |= (intptr_t)(byte & 0x7f) << shift;
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shift += 7;
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} while (byte & 0x80);
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if (shift < 64 && byte & 0x40) {
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result |= -(1LL << shift);
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}
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if (out)
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*out = result;
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return bytes;
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}
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