Revision 7dde48ea7aa18de1174628e21510967b0ad71d7c authored by Junio C Hamano on 19 May 2014, 17:35:36 UTC, committed by Junio C Hamano on 19 May 2014, 17:35:36 UTC
* lt/request-pull:
  request-pull: resurrect for-linus -> tags/for-linus DWIM
2 parent s 5714722 + d952cbb
Raw File
varint.c
#include "varint.h"

uintmax_t decode_varint(const unsigned char **bufp)
{
	const unsigned char *buf = *bufp;
	unsigned char c = *buf++;
	uintmax_t val = c & 127;
	while (c & 128) {
		val += 1;
		if (!val || MSB(val, 7))
			return 0; /* overflow */
		c = *buf++;
		val = (val << 7) + (c & 127);
	}
	*bufp = buf;
	return val;
}

int encode_varint(uintmax_t value, unsigned char *buf)
{
	unsigned char varint[16];
	unsigned pos = sizeof(varint) - 1;
	varint[pos] = value & 127;
	while (value >>= 7)
		varint[--pos] = 128 | (--value & 127);
	if (buf)
		memcpy(buf, varint + pos, sizeof(varint) - pos);
	return sizeof(varint) - pos;
}
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