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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [string/] [strspn.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1010 ivang
/*
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FUNCTION
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        <<strspn>>---find initial match
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INDEX
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        strspn
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ANSI_SYNOPSIS
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        #include <string.h>
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        size_t strspn(const char *<[s1]>, const char *<[s2]>);
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TRAD_SYNOPSIS
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        #include <string.h>
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        size_t strspn(<[s1]>, <[s2]>)
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        char *<[s1]>;
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        char *<[s2]>;
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DESCRIPTION
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        This function computes the length of the initial segment of
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        the string pointed to by <[s1]> which consists entirely of
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        characters from the string pointed to by <[s2]> (excluding the
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        terminating null character).
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RETURNS
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        <<strspn>> returns the length of the segment found.
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PORTABILITY
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<<strspn>> is ANSI C.
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<<strspn>> requires no supporting OS subroutines.
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QUICKREF
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        strspn ansi pure
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*/
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#include <string.h>
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size_t
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_DEFUN (strspn, (s1, s2),
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        _CONST char *s1 _AND
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        _CONST char *s2)
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{
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  _CONST char *s = s1;
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  _CONST char *c;
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  while (*s1)
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    {
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      for (c = s2; *c; c++)
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        {
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          if (*s1 == *c)
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            break;
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        }
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      if (*c == '\0')
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        break;
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      s1++;
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    }
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  return s1 - s;
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}

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