diplodocus.org Git - nmh/blob - sbr/m_atoi.c

   1
   2 /*
   3  * m_atoi.c -- Parse a string representation of a message number, and
   4  *          -- return the numeric value of the message.  If the string
   5  *          -- contains any non-digit characters, then return 0.
   6  *
   7  * $Id$
   8  */
   9
  10 #include <h/mh.h>
  11
  12
  13 int
  14 m_atoi (char *str)
  15 {
  16     int i;
  17     char *cp;
  18
  19     for (i = 0, cp = str; *cp; cp++) {
  20 #ifdef LOCALE
  21         if (!isdigit(*cp))
  22 #else
  23         if (*cp < '0' || *cp > '9')
  24 #endif
  25             return 0;
  26
  27         i *= 10;
  28         i += (*cp - '0');
  29     }
  30
  31     return i;
  32 }