Commit 06fdba53 authored by Willy Tarreau's avatar Willy Tarreau Committed by Paul E. McKenney
Browse files

tools/nolibc/stdlib: extract the stdlib-specific functions to their own file 



The new file stdlib.h contains the definitions of functions that
are usually found in stdlib.h. Many more could certainly be added.

Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent bd8c8fbb

tools/include/nolibc/nolibc.h

+1 −66
Original line number Diff line number Diff line
@@ -87,40 +87,11 @@ 
#include "arch.h"

#include "types.h"

#include "sys.h"

#include "stdlib.h"



/* Used by programs to avoid std includes */

#define NOLIBC



static __attribute__((unused))

int tcsetpgrp(int fd, pid_t pid)

{

	return ioctl(fd, TIOCSPGRP, &pid);

}



static __attribute__((unused))

unsigned int sleep(unsigned int seconds)

{

	struct timeval my_timeval = { seconds, 0 };



	if (sys_select(0, 0, 0, 0, &my_timeval) < 0)

		return my_timeval.tv_sec + !!my_timeval.tv_usec;

	else

		return 0;

}



static __attribute__((unused))

int msleep(unsigned int msecs)

{

	struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };



	if (sys_select(0, 0, 0, 0, &my_timeval) < 0)

		return (my_timeval.tv_sec * 1000) +

			(my_timeval.tv_usec / 1000) +

			!!(my_timeval.tv_usec % 1000);

	else

		return 0;

}



/* some size-optimized reimplementations of a few common str* and mem*

 * functions. They're marked static, except memcpy() and raise() which are used

 * by libgcc on ARM, so they are marked weak instead in order not to cause an
@@ -216,35 +187,6 @@ int isdigit(int c) 
	return (unsigned int)(c - '0') <= 9;

}



static __attribute__((unused))

long atol(const char *s)

{

	unsigned long ret = 0;

	unsigned long d;

	int neg = 0;



	if (*s == '-') {

		neg = 1;

		s++;

	}



	while (1) {

		d = (*s++) - '0';

		if (d > 9)

			break;

		ret *= 10;

		ret += d;

	}



	return neg ? -ret : ret;

}



static __attribute__((unused))

int atoi(const char *s)

{

	return atol(s);

}



static __attribute__((unused))

const char *ltoa(long in)

{
@@ -273,13 +215,6 @@ void *memcpy(void *dst, const void *src, size_t len) 
	return memmove(dst, src, len);

}



/* needed by libgcc for divide by zero */

__attribute__((weak,unused))

int raise(int signal)

{

	return kill(getpid(), signal);

}



/* Here come a few helper functions */



static __attribute__((unused))

tools/include/nolibc/stdlib.h

0 → 100644
+85 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

/*

 * stdlib function definitions for NOLIBC

 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>

 */



#ifndef _NOLIBC_STDLIB_H

#define _NOLIBC_STDLIB_H



#include "std.h"

#include "arch.h"

#include "types.h"

#include "sys.h"



/*

 * As much as possible, please keep functions alphabetically sorted.

 */



static __attribute__((unused))

long atol(const char *s)

{

	unsigned long ret = 0;

	unsigned long d;

	int neg = 0;



	if (*s == '-') {

		neg = 1;

		s++;

	}



	while (1) {

		d = (*s++) - '0';

		if (d > 9)

			break;

		ret *= 10;

		ret += d;

	}



	return neg ? -ret : ret;

}



static __attribute__((unused))

int atoi(const char *s)

{

	return atol(s);

}



static __attribute__((unused))

int msleep(unsigned int msecs)

{

	struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };



	if (sys_select(0, 0, 0, 0, &my_timeval) < 0)

		return (my_timeval.tv_sec * 1000) +

			(my_timeval.tv_usec / 1000) +

			!!(my_timeval.tv_usec % 1000);

	else

		return 0;

}



/* This one is not marked static as it's needed by libgcc for divide by zero */

__attribute__((weak,unused))

int raise(int signal)

{

	return kill(getpid(), signal);

}



static __attribute__((unused))

unsigned int sleep(unsigned int seconds)

{

	struct timeval my_timeval = { seconds, 0 };



	if (sys_select(0, 0, 0, 0, &my_timeval) < 0)

		return my_timeval.tv_sec + !!my_timeval.tv_usec;

	else

		return 0;

}



static __attribute__((unused))

int tcsetpgrp(int fd, pid_t pid)

{

	return ioctl(fd, TIOCSPGRP, &pid);

}



#endif /* _NOLIBC_STDLIB_H */