+/* $Id$ */
+
+/* strtoimax( const char *, char * *, int )
+
+ This file is part of the Public Domain C Library (PDCLib).
+ Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <limits.h>
+#include <inttypes.h>
+
+#ifndef REGTEST
+
+#include <stddef.h>
+
+intmax_t strtoimax( const char * _PDCLIB_restrict nptr, char ** _PDCLIB_restrict endptr, int base )
+{
+ intmax_t rc;
+ char sign = '+';
+ const char * p = _PDCLIB_strtox_prelim( nptr, &sign, &base );
+ if ( base < 2 || base > 36 ) return 0;
+ if ( sign == '+' )
+ {
+ rc = (intmax_t)_PDCLIB_strtox_main( &p, (unsigned)base, (uintmax_t)INTMAX_MAX, (uintmax_t)( INTMAX_MAX / base ), (int)( INTMAX_MAX % base ), &sign );
+ }
+ else
+ {
+ /* FIXME: This breaks on some machines that round negatives wrongly */
+ /* FIXME: Sign error not caught by testdriver */
+ rc = (intmax_t)_PDCLIB_strtox_main( &p, (unsigned)base, (uintmax_t)INTMAX_MIN, (uintmax_t)( INTMAX_MIN / -base ), (int)( -( INTMAX_MIN % base ) ), &sign );
+ }
+ if ( endptr != NULL ) *endptr = ( p != NULL ) ? (char *) p : (char *) nptr;
+ return ( sign == '+' ) ? rc : -rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+#include <errno.h>
+
+int main( void )
+{
+ char * endptr;
+ /* this, to base 36, overflows even a 256 bit integer */
+ char overflow[] = "-ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ_";
+ /* tricky border case */
+ char tricky[] = "+0xz";
+ errno = 0;
+ /* basic functionality */
+ TESTCASE( strtoimax( "123", NULL, 10 ) == 123 );
+ /* proper detecting of default base 10 */
+ TESTCASE( strtoimax( "456", NULL, 0 ) == 456 );
+ /* proper functioning to smaller base */
+ TESTCASE( strtoimax( "14", NULL, 8 ) == 12 );
+ /* proper autodetecting of octal */
+ TESTCASE( strtoimax( "016", NULL, 0 ) == 14 );
+ /* proper autodetecting of hexadecimal, lowercase 'x' */
+ TESTCASE( strtoimax( "0xFF", NULL, 0 ) == 255 );
+ /* proper autodetecting of hexadecimal, uppercase 'X' */
+ TESTCASE( strtoimax( "0Xa1", NULL, 0 ) == 161 );
+ /* proper handling of border case: 0x followed by non-hexdigit */
+ TESTCASE( strtoimax( tricky, &endptr, 0 ) == 0 );
+ TESTCASE( endptr == tricky + 2 );
+ /* proper handling of border case: 0 followed by non-octdigit */
+ TESTCASE( strtoimax( tricky, &endptr, 8 ) == 0 );
+ TESTCASE( endptr == tricky + 2 );
+ /* errno should still be 0 */
+ TESTCASE( errno == 0 );
+ /* overflowing subject sequence must still return proper endptr */
+ TESTCASE( strtoimax( overflow, &endptr, 36 ) == INTMAX_MIN );
+ TESTCASE( errno == ERANGE );
+ TESTCASE( ( endptr - overflow ) == 53 );
+ /* same for positive */
+ errno = 0;
+ TESTCASE( strtoimax( overflow + 1, &endptr, 36 ) == INTMAX_MAX );
+ TESTCASE( errno == ERANGE );
+ TESTCASE( ( endptr - overflow ) == 53 );
+ /* testing skipping of leading whitespace */
+ TESTCASE( strtoimax( " \n\v\t\f789", NULL, 0 ) == 789 );
+ /* testing conversion failure */
+ TESTCASE( strtoimax( overflow, &endptr, 10 ) == 0 );
+ TESTCASE( endptr == overflow );
+ endptr = NULL;
+ TESTCASE( strtoimax( overflow, &endptr, 0 ) == 0 );
+ TESTCASE( endptr == overflow );
+ /* These tests assume two-complement, but conversion should work for */
+ /* one-complement and signed magnitude just as well. Anyone having a */
+ /* platform to test this on? */
+ errno = 0;
+#if INTMAX_MAX == 0x7fffffffffffffffLL
+ /* testing "even" overflow, i.e. base is power of two */
+ TESTCASE( strtoimax( "0x7FFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffff );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "0x8000000000000000", NULL, 0 ) == INTMAX_MAX );
+ TESTCASE( errno == ERANGE );
+ errno = 0;
+ TESTCASE( strtoimax( "-0x7FFFFFFFFFFFFFFF", NULL, 0 ) == (long long)0x8000000000000001 );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "-0x8000000000000000", NULL, 0 ) == INTMAX_MIN );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "-0x8000000000000001", NULL, 0 ) == INTMAX_MIN );
+ TESTCASE( errno == ERANGE );
+ /* TODO: test "odd" overflow, i.e. base is not power of two */
+#elif INTMAX_MAX == 0x7fffffffffffffffffffffffffffffffLL
+ /* testing "even" overflow, i.e. base is power of two */
+ TESTCASE( strtoimax( "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffffffffffffffffffff );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "0x80000000000000000000000000000000", NULL, 0 ) == INTMAX_MAX );
+ TESTCASE( errno == ERANGE );
+ errno = 0;
+ TESTCASE( strtoimax( "-0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == -0x80000000000000000000000000000001 );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "-0x80000000000000000000000000000000", NULL, 0 ) == INTMAX_MIN );
+ TESTCASE( errno == 0 );
+ TESTCASE( strtoimax( "-0x80000000000000000000000000000001", NULL, 0 ) == INTMAX_MIN );
+ TESTCASE( errno == ERANGE );
+ /* TODO: test "odd" overflow, i.e. base is not power of two */
+#else
+#error Unsupported width of 'long long' (neither 64 nor 128 bit).
+#endif
+ return TEST_RESULTS;
+}
+
+#endif