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+@c Documentation of gnulib module 'c-strtod'.
+
+@c Copyright (C) 2008-2011 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, with no Front-Cover Texts, and with no Back-Cover
+@c Texts. A copy of the license is included in the ``GNU Free
+@c Documentation License'' file as part of this distribution.
+
+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}.