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v0.5.1
Revision 5d417842efeafb6e109db7574196901c4e95d273 authored by Junio C Hamano on 31 December 2012, 22:24:22 UTC, committed by Junio C Hamano on 31 December 2012, 22:25:57 UTC 
Git 1.8.1
 
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 3b73c7d
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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