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reftable/basics: provide wrappers for big endian conversion

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We're using a mixture of big endian conversion functions provided by
both the reftable library, but also by the Git codebase. Refactor the
code so that we exclusively use reftable-provided wrappers in order to
untangle us from the Git codebase.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2025-02-18 10:20:45 +01:00
committed by Junio C Hamano
parent 6e3ea71639
commit e676694298
7 changed files with 127 additions and 58 deletions
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76
reftable/basics.h
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@@ -76,9 +76,79 @@ char *reftable_buf_detach(struct reftable_buf *buf);
/* Bigendian en/decoding of integers */
void put_be24(uint8_t *out, uint32_t i);
uint32_t get_be24(uint8_t *in);
void put_be16(uint8_t *out, uint16_t i);
static inline void reftable_put_be16(void *out, uint16_t i)
{
unsigned char *p = out;
p[0] = (uint8_t)((i >> 8) & 0xff);
p[1] = (uint8_t)((i >> 0) & 0xff);
}
static inline void reftable_put_be24(void *out, uint32_t i)
{
unsigned char *p = out;
p[0] = (uint8_t)((i >> 16) & 0xff);
p[1] = (uint8_t)((i >> 8) & 0xff);
p[2] = (uint8_t)((i >> 0) & 0xff);
}
static inline void reftable_put_be32(void *out, uint32_t i)
{
unsigned char *p = out;
p[0] = (uint8_t)((i >> 24) & 0xff);
p[1] = (uint8_t)((i >> 16) & 0xff);
p[2] = (uint8_t)((i >> 8) & 0xff);
p[3] = (uint8_t)((i >> 0) & 0xff);
}
static inline void reftable_put_be64(void *out, uint64_t i)
{
unsigned char *p = out;
p[0] = (uint8_t)((i >> 56) & 0xff);
p[1] = (uint8_t)((i >> 48) & 0xff);
p[2] = (uint8_t)((i >> 40) & 0xff);
p[3] = (uint8_t)((i >> 32) & 0xff);
p[4] = (uint8_t)((i >> 24) & 0xff);
p[5] = (uint8_t)((i >> 16) & 0xff);
p[6] = (uint8_t)((i >> 8) & 0xff);
p[7] = (uint8_t)((i >> 0) & 0xff);
}
static inline uint16_t reftable_get_be16(const void *in)
{
const unsigned char *p = in;
return (uint16_t)(p[0]) << 8 |
(uint16_t)(p[1]) << 0;
}
static inline uint32_t reftable_get_be24(const void *in)
{
const unsigned char *p = in;
return (uint32_t)(p[0]) << 16 |
(uint32_t)(p[1]) << 8 |
(uint32_t)(p[2]) << 0;
}
static inline uint32_t reftable_get_be32(const void *in)
{
const unsigned char *p = in;
return (uint32_t)(p[0]) << 24 |
(uint32_t)(p[1]) << 16 |
(uint32_t)(p[2]) << 8|
(uint32_t)(p[3]) << 0;
}
static inline uint64_t reftable_get_be64(const void *in)
{
const unsigned char *p = in;
return (uint64_t)(p[0]) << 56 |
(uint64_t)(p[1]) << 48 |
(uint64_t)(p[2]) << 40 |
(uint64_t)(p[3]) << 32 |
(uint64_t)(p[4]) << 24 |
(uint64_t)(p[5]) << 16 |
(uint64_t)(p[6]) << 8 |
(uint64_t)(p[7]) << 0;
}
/*
* find smallest index i in [0, sz) at which `f(i) > 0`, assuming that f is