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/* _PDCLIB_strtox_main( const char * *, int, _PDCLIB_uintmax_t, _PDCLIB_uintmax_t, int )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#ifndef REGTEST
_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, uintmax_t error, uintmax_t limval, int limdigit, char * sign )
{
_PDCLIB_uintmax_t rc = 0;
int digit = -1;
const char * x;
while ( ( x = memchr( _PDCLIB_digits, tolower(**p), base ) ) != NULL )
{
digit = x - _PDCLIB_digits;
if ( ( rc < limval ) || ( ( rc == limval ) && ( digit <= limdigit ) ) )
{
rc = rc * base + (unsigned)digit;
++(*p);
}
else
{
errno = ERANGE;
/* TODO: Only if endptr != NULL - but do we really want *another* parameter? */
/* TODO: Earlier version was missing tolower() here but was not caught by tests */
while ( memchr( _PDCLIB_digits, tolower(**p), base ) != NULL ) ++(*p);
/* TODO: This is ugly, but keeps caller from negating the error value */
*sign = '+';
return error;
}
}
if ( digit == -1 )
{
*p = NULL;
return 0;
}
return rc;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#include <errno.h>
int main( void )
{
#ifndef REGTEST
const char * p;
char test[] = "123_";
char fail[] = "xxx";
char sign = '-';
/* basic functionality */
p = test;
errno = 0;
TESTCASE( _PDCLIB_strtox_main( &p, 10u, (uintmax_t)999, (uintmax_t)12, 3, &sign ) == 123 );
TESTCASE( errno == 0 );
TESTCASE( p == &test[3] );
/* proper functioning to smaller base */
p = test;
TESTCASE( _PDCLIB_strtox_main( &p, 8u, (uintmax_t)999, (uintmax_t)12, 3, &sign ) == 0123 );
TESTCASE( errno == 0 );
TESTCASE( p == &test[3] );
/* overflowing subject sequence must still return proper endptr */
p = test;
TESTCASE( _PDCLIB_strtox_main( &p, 4u, (uintmax_t)999, (uintmax_t)1, 2, &sign ) == 999 );
TESTCASE( errno == ERANGE );
TESTCASE( p == &test[3] );
TESTCASE( sign == '+' );
/* testing conversion failure */
errno = 0;
p = fail;
sign = '-';
TESTCASE( _PDCLIB_strtox_main( &p, 10u, (uintmax_t)999, (uintmax_t)99, 8, &sign ) == 0 );
TESTCASE( p == NULL );
#endif
return TEST_RESULTS;
}
#endif
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