12-21-2016
awk -F, '{for(i=1;i<=NF;i++) if ($i~/^P/) $i="P" substr($i,3)}1' OFS=, myFile
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LEARN ABOUT OSX
digittoint_l
DIGITTOINT(3) BSD Library Functions Manual DIGITTOINT(3)
NAME
digittoint, digittoint_l -- convert a numeric character to its integer value
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
digittoint(int c);
#include <xlocale.h>
#include <ctype.h>
int
digittoint_l(int c, locale_t loc);
DESCRIPTION
The digittoint() function converts a numeric character to its corresponding integer value. The character can be any decimal digit or hexa-
decimal digit. With hexadecimal characters, the case of the values does not matter.
While the digittoint() function uses the current locale, the digittoint_l() function may be passed a locale directly. See xlocale(3) for more
information.
RETURN VALUES
The digittoint() function always returns an integer from the range of 0 to 15. If the given character was not a digit as defined by
isxdigit(3), the function will return 0.
SEE ALSO
ctype(3), isdigit(3), isxdigit(3), xlocale(3)
BSD
April 6, 2001 BSD