+/* $Id$ */
+
+/* Release $Name$ */
+
+/* _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 <_PDCLIB_int.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+
+_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, int base, _PDCLIB_uintmax_t error, _PDCLIB_uintmax_t limval, int limdigit )
+{
+ _PDCLIB_uintmax_t rc = 0;
+ int digit = -1;
+ const char * x;
+ while ( ( x = memchr( _PDCLIB_digits, toupper(**p), base ) ) != NULL )
+ {
+ digit = x - _PDCLIB_digits;
+ if ( ( rc < limval ) || ( ( rc == limval ) && ( digit <= limdigit ) ) )
+ {
+ rc = rc * base + ( x - _PDCLIB_digits );
+ ++(*p);
+ }
+ else
+ {
+ errno = ERANGE;
+ /* TODO: Only if endptr != NULL */
+ while ( memchr( _PDCLIB_digits, **p, base ) != NULL ) ++(*p);
+ return error;
+ }
+ }
+ if ( digit == -1 )
+ {
+ *p = NULL;
+ return 0;
+ }
+ return rc;
+}
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <errno.h>
+
+int main()
+{
+ const char * p;
+ char test[] = "123_";
+ char fail[] = "xxx";
+ BEGIN_TESTS;
+ /* basic functionality */
+ p = test;
+ errno = 0;
+ TESTCASE( _PDCLIB_strtox_main( &p, 10, 999, 12, 3 ) == 123 );
+ TESTCASE( errno == 0 );
+ TESTCASE( p == &test[3] );
+ /* proper functioning to smaller base */
+ p = test;
+ TESTCASE( _PDCLIB_strtox_main( &p, 8, 999, 12, 3 ) == 0123 );
+ TESTCASE( errno == 0 );
+ TESTCASE( p == &test[3] );
+ /* overflowing subject sequence must still return proper endptr */
+ p = test;
+ TESTCASE( _PDCLIB_strtox_main( &p, 4, 999, 1, 2 ) == 999 );
+ TESTCASE( errno == ERANGE );
+ TESTCASE( p == &test[3] );
+ /* testing conversion failure */
+ errno = 0;
+ p = fail;
+ TESTCASE( _PDCLIB_strtox_main( &p, 10, 999, 99, 8 ) == 0 );
+ TESTCASE( p == NULL );
+ return TEST_RESULTS;
+}
+
+#endif