mercurial/bitmanipulation.h

packaging: add `HG_DOCKER_OWN_USER` to `dockerdeb` like exists in `dockerrpm`

I was getting build failures when it was trying to write to the working
directory on CentOS 7 without this.  It is basically the same as was added to
the RPM builder in 4c0d4bbdc395.

For some reason, this doesn't work with Xenial, and the only solution I found
was to invoke it with UID 1000 on the host side.  It doesn't EOL until April
2024, but it also has python 3.5.2, so this build complication is the least of
the problems with supporting it after py2 is dropped.

Differential Revision: https://phab.mercurial-scm.org/D9394

#ifndef _HG_BITMANIPULATION_H_
#define _HG_BITMANIPULATION_H_

#include <string.h>

#include "compat.h"

static inline uint32_t getbe32(const char *c)
{
	const unsigned char *d = (const unsigned char *)c;

	return ((((uint32_t)d[0]) << 24) | (((uint32_t)d[1]) << 16) |
	        (((uint32_t)d[2]) << 8) | (d[3]));
}

static inline int16_t getbeint16(const char *c)
{
	const unsigned char *d = (const unsigned char *)c;

	return ((d[0] << 8) | (d[1]));
}

static inline uint16_t getbeuint16(const char *c)
{
	const unsigned char *d = (const unsigned char *)c;

	return ((d[0] << 8) | (d[1]));
}

static inline void putbe32(uint32_t x, char *c)
{
	c[0] = (x >> 24) & 0xff;
	c[1] = (x >> 16) & 0xff;
	c[2] = (x >> 8) & 0xff;
	c[3] = (x)&0xff;
}

static inline double getbefloat64(const char *c)
{
	const unsigned char *d = (const unsigned char *)c;
	double ret;
	int i;
	uint64_t t = 0;
	for (i = 0; i < 8; i++) {
		t = (t << 8) + d[i];
	}
	memcpy(&ret, &t, sizeof(t));
	return ret;
}

#endif