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41 lines
712 B
C
41 lines
712 B
C
#include <r_util.h>
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/* dex/dwarf uleb128 implementation */
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R_API const ut8 *r_uleb128 (const ut8 *data, ut64 *v) {
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ut8 c;
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ut64 s, sum;
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for (s = sum = 0; ; s += 7) {
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c = *(data++) & 0xff;
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sum |= ((ut32) (c&0x7f) << s);
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if (!(c&0x80)) break;
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}
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if (v) *v = sum;
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return data;
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}
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R_API const ut8 *r_leb128 (const ut8 *data, st64 *v) {
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ut8 c;
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st64 s, sum;
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for (s = sum = 0;;) {
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c = *(data++) & 0x0ff;
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sum |= ((st64) (c & 0x7f) << s);
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s += 7;
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if (!(c & 0x80)) break;
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}
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if ((s < (8 * sizeof (sum))) && (c & 0x40)) {
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sum |= -((st64)1 << s);
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}
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if (v) *v = sum;
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return data;
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}
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#if 0
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main() {
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ut32 n;
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ut8 *buf = "\x10\x02\x90\x88";
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r_uleb128 (buf, &n);
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printf ("n = %d\n", n);
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}
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#endif
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