Commit d2c18985 authored by Junio C Hamano's avatar Junio C Hamano

varint: make it available outside the context of pack

Signed-off-by: default avatarJunio C Hamano <gitster@pobox.com>
parent e5056c05
......@@ -627,6 +627,7 @@ LIB_H += tree-walk.h
LIB_H += unpack-trees.h
LIB_H += userdiff.h
LIB_H += utf8.h
LIB_H += varint.h
LIB_H += xdiff-interface.h
LIB_H += xdiff/xdiff.h
......@@ -752,6 +753,7 @@ LIB_OBJS += url.o
LIB_OBJS += usage.o
LIB_OBJS += userdiff.o
LIB_OBJS += utf8.o
LIB_OBJS += varint.o
LIB_OBJS += walker.o
LIB_OBJS += wrapper.o
LIB_OBJS += write_or_die.o
......
#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;
}
#ifndef VARINT_H
#define VARINT_H
#include "git-compat-util.h"
extern int encode_varint(uintmax_t, unsigned char *);
extern uintmax_t decode_varint(const unsigned char **);
#endif /* VARINT_H */
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