42 lines
825 B
C
42 lines
825 B
C
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/*
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* File : stdlib.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2008, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2008-08-14 Bernard the first version
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*/
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#include <rtthread.h>
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#if !defined (RT_USING_NEWLIB) && defined (RT_USING_MINILIBC)
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#include "stdlib.h"
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int errno = 0;
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int atoi(const char* s)
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{
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long int v=0;
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int sign=1;
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while ( *s == ' ' || (unsigned int)(*s - 9) < 5u) s++;
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switch (*s)
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{
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case '-':
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sign=-1;
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case '+':
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++s;
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}
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while ((unsigned int) (*s - '0') < 10u)
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{
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v=v*10+*s-'0';
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++s;
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}
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return sign==-1?-v:v;
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}
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#endif
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