5 /* strtoll( const char *, char * *, int )
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 #define _PDCLIB_INT_H _PDCLIB_INT_H
12 #include <_PDCLIB_int.h>
18 long long int strtoll( const char * s, char ** endptr, int base )
22 const char * p = _PDCLIB_strtox_prelim( s, &sign, &base );
25 rc = _PDCLIB_strtox_main( &p, base, LLONG_MAX, LLONG_MAX / base, LLONG_MAX % base, &sign );
29 /* FIXME: This breaks on some machines that round negatives wrongly */
30 rc = _PDCLIB_strtox_main( &p, base, LLONG_MIN, LLONG_MIN / -base, -( LLONG_MIN % base ), &sign );
32 if ( endptr != NULL ) *endptr = ( p != NULL ) ? (char *) p : (char *) s;
33 return ( sign == '+' ) ? rc : -rc;
39 #include <_PDCLIB_test.h>
45 /* this, to base 36, overflows even a 256 bit integer */
46 char overflow[] = "-ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ_";
49 /* basic functionality */
50 TESTCASE( strtoll( "123", NULL, 10 ) == 123 );
51 /* proper detecting of default base 10 */
52 TESTCASE( strtoll( "123", NULL, 0 ) == 123 );
53 /* proper functioning to smaller base */
54 TESTCASE( strtoll( "14", NULL, 8 ) == 12 );
55 /* proper autodetecting of octal */
56 TESTCASE( strtoll( "014", NULL, 0 ) == 12 );
57 /* proper autodetecting of hexadecimal, lowercase 'x' */
58 TESTCASE( strtoll( "0xFF", NULL, 0 ) == 255 );
59 /* proper autodetecting of hexadecimal, uppercase 'X' */
60 TESTCASE( strtoll( "0XFF", NULL, 0 ) == 255 );
61 /* errno should still be 0 */
62 TESTCASE( errno == 0 );
63 /* overflowing subject sequence must still return proper endptr */
64 TESTCASE( strtoll( overflow, &endptr, 36 ) == LLONG_MIN );
65 TESTCASE( errno == ERANGE );
66 TESTCASE( ( endptr - overflow ) == 53 );
67 /* same for positive */
69 TESTCASE( strtoll( overflow + 1, &endptr, 36 ) == LLONG_MAX );
70 TESTCASE( errno == ERANGE );
71 TESTCASE( ( endptr - overflow ) == 53 );
72 /* testing skipping of leading whitespace */
73 TESTCASE( strtoll( " \n\v\t\f123", NULL, 0 ) == 123 );
74 /* testing conversion failure */
75 TESTCASE( strtoll( overflow, &endptr, 10 ) == 0 );
76 TESTCASE( endptr == overflow );
78 TESTCASE( strtoll( overflow, &endptr, 0 ) == 0 );
79 TESTCASE( endptr == overflow );
80 /* These tests assume two-complement, but conversion should work for */
81 /* one-complement and signed magnitude just as well. Anyone having a */
82 /* platform to test this on? */
84 #if _PDCLIB_LLONG_BYTES == 8
85 /* testing "even" overflow, i.e. base is power of two */
86 TESTCASE( strtoll( "0x7FFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffff );
87 TESTCASE( errno == 0 );
88 TESTCASE( strtoll( "0x8000000000000000", NULL, 0 ) == LLONG_MAX );
89 TESTCASE( errno == ERANGE );
91 TESTCASE( strtoll( "-0x7FFFFFFFFFFFFFFF", NULL, 0 ) == 0x8000000000000001 );
92 TESTCASE( errno == 0 );
93 TESTCASE( strtoll( "-0x8000000000000000", NULL, 0 ) == LLONG_MIN );
94 TESTCASE( errno == 0 );
95 TESTCASE( strtoll( "-0x8000000000000001", NULL, 0 ) == LLONG_MIN );
96 TESTCASE( errno == ERANGE );
97 /* TODO: test "odd" overflow, i.e. base is not power of two */
98 #elif _PDCLIB_LONG_BYTES == 16
99 /* testing "even" overflow, i.e. base is power of two */
100 TESTCASE( strtoll( "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffffffffffffffffffff );
101 TESTCASE( errno == 0 );
102 TESTCASE( strtoll( "0x80000000000000000000000000000000", NULL, 0 ) == LLONG_MAX );
103 TESTCASE( errno == ERANGE );
105 TESTCASE( strtoll( "-0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == -0x80000000000000000000000000000001 );
106 TESTCASE( errno == 0 );
107 TESTCASE( strtoll( "-0x80000000000000000000000000000000", NULL, 0 ) == LLONG_MIN );
108 TESTCASE( errno == 0 );
109 TESTCASE( strtoll( "-0x80000000000000000000000000000001", NULL, 0 ) == LLONG_MIN );
110 TESTCASE( errno == ERANGE );
111 /* TODO: test "odd" overflow, i.e. base is not power of two */
113 #error Unsupported width of 'long long' (neither 64 nor 128 bit).