Skip to main content

Browse the archive

Staging
v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision cd81ea1708c0a3ac846e1e6f07c38d8d0b0efc22 authored by Guido van Rossum on 01 March 2001, 00:36:53 UTC, committed by Guido van Rossum on 01 March 2001, 00:36:53 UTC 
Use
 
    find $(srcdir)/Lib -name '*.py[co]' -print | xargs rm -f

to remove all .py[co] files before testing, rather than just those in
the Lib/test directory.  "find" is used all over the Makefile so I
suppose it's safe; how about xargs?
1 parent 895e892
Raw File
Tip revision: cd81ea1708c0a3ac846e1e6f07c38d8d0b0efc22 authored by Guido van Rossum on 01 March 2001, 00:36:53 UTC
Use
Tip revision: cd81ea1
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 "config.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;
}
back to top