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@c Documentation of gnulib module 'c-strtod'.
@c Copyright (C) 2008--2023 Free Software Foundation, Inc.
@c Permission is granted to copy, distribute and/or modify this document
@c under the terms of the GNU Free Documentation License, Version 1.3 or
@c any later version published by the Free Software Foundation; with no
@c Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
@c copy of the license is at <https://www.gnu.org/licenses/fdl-1.3.en.html>.
The @code{c-strtod} module contains a string to number (@samp{double})
conversion function operating on single-byte character strings, that operates
as if the locale encoding was ASCII.
(The "C" locale on many systems has the locale encoding "ASCII".)
The function is:
@smallexample
extern double c_strtod (const char *string, char **endp);
@end smallexample
In particular, only a period @samp{.} is accepted as decimal point, even
when the current locale's notion of decimal point is a comma @samp{,},
and no characters outside the basic character set are accepted.
On platforms without @code{strtod_l}, this function is not safe for use in
multi-threaded applications since it calls @code{setlocale}.
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