atof517

Summary

#include <80c517.h>

float atof517 (
  void *string);      /* string to convert */

Description

The atof517 function converts string into a floating-point value. The input string must be a sequence of characters that can be interpreted as a floating-point number. This function stops processing characters from string at the first one it cannot recognize as part of the number.

The string passed to atof517 must have the following format:

« {+|-} » digits . digits « {e|E} « {+|-} » digits »

Where

digits

May be one or more decimal digits.

Note

This routine uses the arithmetic unit of the Infineon C517x/C509 to provide accelerated execution speed. Do not use this routine with a CPU that does not support this feature.

Return Value

The atof517 function returns the floating-point value that is produced by interpreting the characters in string as a number.

See Also

atof, atoi, atol, strtod, strtod517, strtol, strtoul

Example

#include <80c517.h>
#include <stdio.h> /* for printf */

void tst_atof (void) {
  float f;
  char s [] = "1.23";

  f = atof517 (s);
  printf ("ATOF517(%s) = %f\n", s, f);
}