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/* Copyright (C) 2000 Damir Zucic */
/*=============================================================================
extract_double.c
Purpose:
Extract double value from a string.
Input:
Input string pointer.
Output:
Return value.
Return value:
(1) Double value read from input string, on success.
(2) Zero on failure (separator not found or no digits available).
========includes:============================================================*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
/*======extract double from a string:========================================*/
double ExtractDouble_ (char *sP)
{
char *P0, *P1;
int n;
double value;
/* Colon should be separator: */
if ((P0 = strstr (sP, ":")) == NULL) P0 = sP;
/* Replace each non-numeric character (except */
/* minus sign and decimal point) with space: */
P1 = P0;
while ((n = *P1++) != '\0')
{
if (!isdigit (n) && (n != '-') && (n != '.')) *(P1 - 1) = ' ';
}
/* Try to read double value: */
if (sscanf (P0, "%lf", &value) != 1) return 0.0;
/* If everything worked fine, return the extracted double value: */
return value;
}
/*===========================================================================*/
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