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| FMTSTRTOD(3) | FreeBSD Library Functions Manual | FMTSTRTOD(3) |
NAME
fmtstrtod, fmtcharstod - convert text to numbersSYNOPSIS
#include <utf.h>#include <fmt.h>
double fmtstrtod(char *nptr, char **rptr)
double fmtcharstod(int (*f)(void *), void *a)
DESCRIPTION
Fmtstrtod converts a string pointed to by nptr to floating point representation and, if rptr is not zero, sets *rptr to point to the input character immediately after the string converted. Fmtstrtod recognizes an optional string of tabs and spaces, then an optional sign, then a string of digits optionally containing a decimal point, then an optional or followed by an optionally signed integer.Fmtcharstod interprets floating point numbers in the manner of atof, but gets successive characters by calling (*f)(a). The last call to f terminates the scan, so it must have returned a character that is not a legal continuation of a number. Therefore, it may be necessary to back up the input stream one character after calling fmtcharstod.
SOURCE
https://9fans.github.io/plan9port/unixSEE ALSO
fscanf(3)DIAGNOSTICS
Zero is returned if the beginning of the input string is not interpretable as a number; even in this case, rptr will be updated.
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