5 /* _PDCLIB_atomax( const char * )
7 This file is part of the Public Domain C Library (PDCLib).
8 Permission is granted to use, modify, and / or redistribute at will.
11 #include <_PDCLIB_int.h>
15 _PDCLIB_intmax_t _PDCLIB_atomax( const char * s )
17 _PDCLIB_intmax_t rc = 0;
20 /* TODO: In other than "C" locale, additional patterns may be defined */
21 while ( isspace( *s ) ) ++s;
23 else if ( *s == '-' ) sign = *(s++);
24 while ( ( x = memchr( _PDCLIB_digits, *(s++), 10 ) ) != NULL )
26 rc = rc * 10 + ( x - _PDCLIB_digits );
28 return ( sign == '+' ) ? rc : -rc;
32 #include <_PDCLIB_test.h>
37 /* basic functionality */
38 TESTCASE( _PDCLIB_atomax( "123" ) == 123 );
39 /* testing skipping of leading whitespace and trailing garbage */
40 TESTCASE( _PDCLIB_atomax( " \n\v\t\f123xyz" ) == 123 );