X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdlib%2Fstrtoll.c;fp=functions%2Fstdlib%2Fstrtoll.c;h=2f7a2697d75823ab1054bbb55392ca860118af60;hp=0000000000000000000000000000000000000000;hb=d0efaaaab9fdaccd83ced5aa74b40a9b3a391466;hpb=0292f971663afe513ec4e8881aa2ec9d57b8f152

diff --git a/functions/stdlib/strtoll.c b/functions/stdlib/strtoll.c
new file mode 100644
index 0000000..2f7a269
--- /dev/null
+++ b/functions/stdlib/strtoll.c
@@ -0,0 +1,116 @@
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* strtoll( 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 <_PDCLIB_int.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#ifndef REGTEST
+
+long long int strtoll( const char * s, char ** endptr, int base )
+{
+    long long int rc;
+    char sign = '+';
+    const char * p = _PDCLIB_strtox_prelim( s, &sign, &base );
+    if ( sign == '+' )
+    {
+        rc = _PDCLIB_strtox_main( &p, base, LLONG_MAX, LLONG_MAX / base, LLONG_MAX % base, &sign );
+    }
+    else
+    {
+        /* FIXME: This breaks on some machines that round negatives wrongly */
+        rc = _PDCLIB_strtox_main( &p, base, LLONG_MIN, LLONG_MIN / -base, -( LLONG_MIN % base ), &sign );
+    }
+    if ( endptr != NULL ) *endptr = ( p != NULL ) ? (char *) p : (char *) s;
+    return ( sign == '+' ) ? rc : -rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <errno.h>
+
+int main()
+{
+    char * endptr;
+    /* this, to base 36, overflows even a 256 bit integer */
+    char overflow[] = "-ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ_";
+    BEGIN_TESTS;
+    errno = 0;
+    /* basic functionality */
+    TESTCASE( strtoll( "123", NULL, 10 ) == 123 );
+    /* proper detecting of default base 10 */
+    TESTCASE( strtoll( "123", NULL, 0 ) == 123 );
+    /* proper functioning to smaller base */
+    TESTCASE( strtoll( "14", NULL, 8 ) == 12 );
+    /* proper autodetecting of octal */
+    TESTCASE( strtoll( "014", NULL, 0 ) == 12 );
+    /* proper autodetecting of hexadecimal, lowercase 'x' */
+    TESTCASE( strtoll( "0xFF", NULL, 0 ) == 255 );
+    /* proper autodetecting of hexadecimal, uppercase 'X' */
+    TESTCASE( strtoll( "0XFF", NULL, 0 ) == 255 );
+    /* errno should still be 0 */
+    TESTCASE( errno == 0 );
+    /* overflowing subject sequence must still return proper endptr */
+    TESTCASE( strtoll( overflow, &endptr, 36 ) == LLONG_MIN );
+    TESTCASE( errno == ERANGE );
+    TESTCASE( ( endptr - overflow ) == 53 );
+    /* same for positive */
+    errno = 0;
+    TESTCASE( strtoll( overflow + 1, &endptr, 36 ) == LLONG_MAX );
+    TESTCASE( errno == ERANGE );
+    TESTCASE( ( endptr - overflow ) == 53 );
+    /* testing skipping of leading whitespace */
+    TESTCASE( strtoll( " \n\v\t\f123", NULL, 0 ) == 123 );
+    /* testing conversion failure */
+    TESTCASE( strtoll( overflow, &endptr, 10 ) == 0 );
+    TESTCASE( endptr == overflow );
+    endptr = NULL;
+    TESTCASE( strtoll( 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 _PDCLIB_LLONG_BYTES == 8
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoll( "0x7FFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffff );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "0x8000000000000000", NULL, 0 ) == LLONG_MAX );
+    TESTCASE( errno == ERANGE );
+    errno = 0;
+    TESTCASE( strtoll( "-0x7FFFFFFFFFFFFFFF", NULL, 0 ) == 0x8000000000000001 );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "-0x8000000000000000", NULL, 0 ) == LLONG_MIN );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "-0x8000000000000001", NULL, 0 ) == LLONG_MIN );
+    TESTCASE( errno == ERANGE );
+    /* TODO: test "odd" overflow, i.e. base is not power of two */
+#elif _PDCLIB_LONG_BYTES == 16
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoll( "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == 0x7fffffffffffffffffffffffffffffff );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "0x80000000000000000000000000000000", NULL, 0 ) == LLONG_MAX );
+    TESTCASE( errno == ERANGE );
+    errno = 0;
+    TESTCASE( strtoll( "-0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", NULL, 0 ) == -0x80000000000000000000000000000001 );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "-0x80000000000000000000000000000000", NULL, 0 ) == LLONG_MIN );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoll( "-0x80000000000000000000000000000001", NULL, 0 ) == LLONG_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