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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 95b0991af34944bc61176cad025a447318b124c3 authored by Tarek Ziadé on 29 August 2009, 13:37:34 UTC, committed by Tarek Ziadé on 29 August 2009, 13:37:34 UTC 
Merged revisions 74578 via svnmerge from
 
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r74578 | tarek.ziade | 2009-08-29 15:33:21 +0200 (Sat, 29 Aug 2009) | 1 line

  fixed #6801: symmetric_difference_update also accepts pipe
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Tip revision: 95b0991af34944bc61176cad025a447318b124c3 authored by Tarek Ziadé on 29 August 2009, 13:37:34 UTC
Merged revisions 74578 via svnmerge from
Tip revision: 95b0991
atof.c 

/* Just in case you haven't got an atof() around...
   This one doesn't check for bad syntax or overflow,
   and is slow and inaccurate.
   But it's good enough for the occasional string literal... */

#include "pyconfig.h"

#include <ctype.h>

double atof(char *s)
{
	double a = 0.0;
	int e = 0;
	int c;
	while ((c = *s++) != '\0' && isdigit(c)) {
		a = a*10.0 + (c - '0');
	}
	if (c == '.') {
		while ((c = *s++) != '\0' && isdigit(c)) {
			a = a*10.0 + (c - '0');
			e = e-1;
		}
	}
	if (c == 'e' || c == 'E') {
		int sign = 1;
		int i = 0;
		c = *s++;
		if (c == '+')
			c = *s++;
		else if (c == '-') {
			c = *s++;
			sign = -1;
		}
		while (isdigit(c)) {
			i = i*10 + (c - '0');
			c = *s++;
		}
		e += i*sign;
	}
	while (e > 0) {
		a *= 10.0;
		e--;
	}
	while (e < 0) {
		a *= 0.1;
		e++;
	}
	return a;
}
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