// This module does unit testing of m_libcbase.
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "pub_tool_basics.h" /* UInt et al, needed for pub_tool_vki.h */
#include "pub_tool_vki.h"
#include "m_libcbase.c"
#define CHECK(x) \
if (!x) { fprintf(stderr, "failure: %s:%d\n", __FILE__, __LINE__); }
void test_VG_STREQ(void)
{
CHECK( ! VG_STREQ(NULL, NULL) ); // Nb: strcmp() considers these equal
CHECK( ! VG_STREQ(NULL, "ab") ); // Nb: strcmp() seg faults on this
CHECK( ! VG_STREQ("ab", NULL) ); // Nb: strcmp() seg faults on this
CHECK( ! VG_STREQ("", "a") );
CHECK( ! VG_STREQ("a", "") );
CHECK( ! VG_STREQ("abc", "abcd"));
CHECK( ! VG_STREQ("abcd", "abc") );
CHECK( ! VG_STREQ("Abcd", "abcd"));
CHECK( ! VG_STREQ("abcd", "Abcd"));
CHECK( VG_STREQ("", "") );
CHECK( VG_STREQ("a", "a") );
CHECK( VG_STREQ("abcd", "abcd") );
}
void test_VG_STREQN(void)
{
CHECK( ! VG_STREQN(0, NULL, NULL) );
CHECK( ! VG_STREQN(5, NULL, NULL) );
CHECK( ! VG_STREQN(0, NULL, "ab") );
CHECK( ! VG_STREQN(5, NULL, "ab") );
CHECK( ! VG_STREQN(0, "ab", NULL) );
CHECK( ! VG_STREQN(1, "", "a") );
CHECK( ! VG_STREQN(1, "a", "") );
CHECK( ! VG_STREQN(4, "abc", "abcd"));
CHECK( ! VG_STREQN(4, "abcd", "abc") );
CHECK( ! VG_STREQN(1, "Abcd", "abcd"));
CHECK( ! VG_STREQN(4, "Abcd", "abcd"));
CHECK( ! VG_STREQN(4, "abcd", "abce"));
CHECK( ! VG_STREQN(9, "abcd", "abce"));
CHECK( VG_STREQN(0, "", "") );
CHECK( VG_STREQN(1, "", "") );
CHECK( VG_STREQN(0, "a", "a") );
CHECK( VG_STREQN(1, "a", "a") );
CHECK( VG_STREQN(2, "a", "a") );
CHECK( VG_STREQN(9, "a", "a") );
CHECK( VG_STREQN(1, "ab", "ac"));
CHECK( VG_STREQN(3, "abcd", "abce"));
}
// On PPC/Linux VKI_PAGE_SIZE is a variable, not a macro.
#if defined(VGP_ppc32_linux) || defined(VGP_ppc64_linux)
unsigned long VKI_PAGE_SIZE = 1UL << 12;
#endif
void test_VG_IS_XYZ_ALIGNED(void)
{
CHECK( VG_IS_2_ALIGNED(0x0) );
CHECK( ! VG_IS_2_ALIGNED(0x1) );
CHECK( VG_IS_2_ALIGNED(0x2) );
CHECK( ! VG_IS_2_ALIGNED(0x3) );
CHECK( VG_IS_2_ALIGNED(0x4) );
CHECK( ! VG_IS_2_ALIGNED(0x5) );
CHECK( VG_IS_2_ALIGNED(0x6) );
CHECK( ! VG_IS_2_ALIGNED(0x7) );
CHECK( VG_IS_2_ALIGNED(0x8) );
CHECK( ! VG_IS_2_ALIGNED(0x9) );
CHECK( VG_IS_2_ALIGNED(0xa) );
CHECK( ! VG_IS_2_ALIGNED(0xb) );
CHECK( VG_IS_2_ALIGNED(0xc) );
CHECK( ! VG_IS_2_ALIGNED(0xd) );
CHECK( VG_IS_2_ALIGNED(0xe) );
CHECK( ! VG_IS_2_ALIGNED(0xf) );
CHECK( VG_IS_4_ALIGNED(0x0) );
CHECK( ! VG_IS_4_ALIGNED(0x1) );
CHECK( ! VG_IS_4_ALIGNED(0x2) );
CHECK( ! VG_IS_4_ALIGNED(0x3) );
CHECK( VG_IS_4_ALIGNED(0x4) );
CHECK( ! VG_IS_4_ALIGNED(0x5) );
CHECK( ! VG_IS_4_ALIGNED(0x6) );
CHECK( ! VG_IS_4_ALIGNED(0x7) );
CHECK( VG_IS_4_ALIGNED(0x8) );
CHECK( ! VG_IS_4_ALIGNED(0x9) );
CHECK( ! VG_IS_4_ALIGNED(0xa) );
CHECK( ! VG_IS_4_ALIGNED(0xb) );
CHECK( VG_IS_4_ALIGNED(0xc) );
CHECK( ! VG_IS_4_ALIGNED(0xd) );
CHECK( ! VG_IS_4_ALIGNED(0xe) );
CHECK( ! VG_IS_4_ALIGNED(0xf) );
CHECK( VG_IS_8_ALIGNED(0x0) );
CHECK( ! VG_IS_8_ALIGNED(0x1) );
CHECK( ! VG_IS_8_ALIGNED(0x2) );
CHECK( ! VG_IS_8_ALIGNED(0x3) );
CHECK( ! VG_IS_8_ALIGNED(0x4) );
CHECK( ! VG_IS_8_ALIGNED(0x5) );
CHECK( ! VG_IS_8_ALIGNED(0x6) );
CHECK( ! VG_IS_8_ALIGNED(0x7) );
CHECK( VG_IS_8_ALIGNED(0x8) );
CHECK( ! VG_IS_8_ALIGNED(0x9) );
CHECK( ! VG_IS_8_ALIGNED(0xa) );
CHECK( ! VG_IS_8_ALIGNED(0xb) );
CHECK( ! VG_IS_8_ALIGNED(0xc) );
CHECK( ! VG_IS_8_ALIGNED(0xd) );
CHECK( ! VG_IS_8_ALIGNED(0xe) );
CHECK( ! VG_IS_8_ALIGNED(0xf) );
CHECK( VG_IS_16_ALIGNED(0x0) );
CHECK( ! VG_IS_16_ALIGNED(0x1) );
CHECK( ! VG_IS_16_ALIGNED(0x2) );
CHECK( ! VG_IS_16_ALIGNED(0x3) );
CHECK( ! VG_IS_16_ALIGNED(0x4) );
CHECK( ! VG_IS_16_ALIGNED(0x5) );
CHECK( ! VG_IS_16_ALIGNED(0x6) );
CHECK( ! VG_IS_16_ALIGNED(0x7) );
CHECK( ! VG_IS_16_ALIGNED(0x8) );
CHECK( ! VG_IS_16_ALIGNED(0x9) );
CHECK( ! VG_IS_16_ALIGNED(0xa) );
CHECK( ! VG_IS_16_ALIGNED(0xb) );
CHECK( ! VG_IS_16_ALIGNED(0xc) );
CHECK( ! VG_IS_16_ALIGNED(0xd) );
CHECK( ! VG_IS_16_ALIGNED(0xe) );
CHECK( ! VG_IS_16_ALIGNED(0xf) );
CHECK( VG_IS_WORD_ALIGNED(0x0) );
CHECK( ! VG_IS_WORD_ALIGNED(0x1) );
CHECK( ! VG_IS_WORD_ALIGNED(0x2) );
CHECK( ! VG_IS_WORD_ALIGNED(0x3) );
// 0x4 case below
CHECK( ! VG_IS_WORD_ALIGNED(0x5) );
CHECK( ! VG_IS_WORD_ALIGNED(0x6) );
CHECK( ! VG_IS_WORD_ALIGNED(0x7) );
CHECK( VG_IS_WORD_ALIGNED(0x8) );
CHECK( ! VG_IS_WORD_ALIGNED(0x9) );
CHECK( ! VG_IS_WORD_ALIGNED(0xa) );
CHECK( ! VG_IS_WORD_ALIGNED(0xb) );
// 0xc case below
CHECK( ! VG_IS_WORD_ALIGNED(0xd) );
CHECK( ! VG_IS_WORD_ALIGNED(0xe) );
CHECK( ! VG_IS_WORD_ALIGNED(0xf) );
if (4 == sizeof(void*)) {
CHECK( VG_IS_WORD_ALIGNED(0x4) );
CHECK( VG_IS_WORD_ALIGNED(0xc) );
} else if (8 == sizeof(void*)) {
CHECK( ! VG_IS_WORD_ALIGNED(0x4) );
CHECK( ! VG_IS_WORD_ALIGNED(0xc) );
} else {
assert(0);
}
CHECK( VG_IS_PAGE_ALIGNED(0x0) );
CHECK( ! VG_IS_PAGE_ALIGNED(0x1) );
CHECK( ! VG_IS_PAGE_ALIGNED(0x2) );
CHECK( ! VG_IS_PAGE_ALIGNED(0x3) );
CHECK( ! VG_IS_PAGE_ALIGNED(0x4) );
CHECK( ! VG_IS_PAGE_ALIGNED(VKI_PAGE_SIZE-1) );
CHECK( VG_IS_PAGE_ALIGNED(VKI_PAGE_SIZE ) );
CHECK( ! VG_IS_PAGE_ALIGNED(VKI_PAGE_SIZE+1) );
}
void test_VG_ROUND_et_al()
{
CHECK( 0 == VG_ROUNDDN(0, 1) );
CHECK( 1 == VG_ROUNDDN(1, 1) );
CHECK( 2 == VG_ROUNDDN(2, 1) );
CHECK( 3 == VG_ROUNDDN(3, 1) );
CHECK( 4 == VG_ROUNDDN(4, 1) );
CHECK( 5 == VG_ROUNDDN(5, 1) );
CHECK( 6 == VG_ROUNDDN(6, 1) );
CHECK( 7 == VG_ROUNDDN(7, 1) );
CHECK( 0 == VG_ROUNDUP(0, 1) );
CHECK( 1 == VG_ROUNDUP(1, 1) );
CHECK( 2 == VG_ROUNDUP(2, 1) );
CHECK( 3 == VG_ROUNDUP(3, 1) );
CHECK( 4 == VG_ROUNDUP(4, 1) );
CHECK( 5 == VG_ROUNDUP(5, 1) );
CHECK( 6 == VG_ROUNDUP(6, 1) );
CHECK( 7 == VG_ROUNDUP(7, 1) );
CHECK( 0 == VG_ROUNDDN(0, 2) );
CHECK( 0 == VG_ROUNDDN(1, 2) );
CHECK( 2 == VG_ROUNDDN(2, 2) );
CHECK( 2 == VG_ROUNDDN(3, 2) );
CHECK( 4 == VG_ROUNDDN(4, 2) );
CHECK( 4 == VG_ROUNDDN(5, 2) );
CHECK( 6 == VG_ROUNDDN(6, 2) );
CHECK( 6 == VG_ROUNDDN(7, 2) );
CHECK( 0 == VG_ROUNDUP(0, 2) );
CHECK( 2 == VG_ROUNDUP(1, 2) );
CHECK( 2 == VG_ROUNDUP(2, 2) );
CHECK( 4 == VG_ROUNDUP(3, 2) );
CHECK( 4 == VG_ROUNDUP(4, 2) );
CHECK( 6 == VG_ROUNDUP(5, 2) );
CHECK( 6 == VG_ROUNDUP(6, 2) );
CHECK( 8 == VG_ROUNDUP(7, 2) );
CHECK( 0 == VG_ROUNDDN(0, 4) );
CHECK( 0 == VG_ROUNDDN(1, 4) );
CHECK( 0 == VG_ROUNDDN(2, 4) );
CHECK( 0 == VG_ROUNDDN(3, 4) );
CHECK( 4 == VG_ROUNDDN(4, 4) );
CHECK( 4 == VG_ROUNDDN(5, 4) );
CHECK( 4 == VG_ROUNDDN(6, 4) );
CHECK( 4 == VG_ROUNDDN(7, 4) );
CHECK( 0 == VG_ROUNDUP(0, 4) );
CHECK( 4 == VG_ROUNDUP(1, 4) );
CHECK( 4 == VG_ROUNDUP(2, 4) );
CHECK( 4 == VG_ROUNDUP(3, 4) );
CHECK( 4 == VG_ROUNDUP(4, 4) );
CHECK( 8 == VG_ROUNDUP(5, 4) );
CHECK( 8 == VG_ROUNDUP(6, 4) );
CHECK( 8 == VG_ROUNDUP(7, 4) );
CHECK( 0 == VG_ROUNDDN(0, 8) );
CHECK( 0 == VG_ROUNDDN(1, 8) );
CHECK( 0 == VG_ROUNDDN(2, 8) );
CHECK( 0 == VG_ROUNDDN(3, 8) );
CHECK( 0 == VG_ROUNDDN(4, 8) );
CHECK( 0 == VG_ROUNDDN(5, 8) );
CHECK( 0 == VG_ROUNDDN(6, 8) );
CHECK( 0 == VG_ROUNDDN(7, 8) );
CHECK( 0 == VG_ROUNDUP(0, 8) );
CHECK( 8 == VG_ROUNDUP(1, 8) );
CHECK( 8 == VG_ROUNDUP(2, 8) );
CHECK( 8 == VG_ROUNDUP(3, 8) );
CHECK( 8 == VG_ROUNDUP(4, 8) );
CHECK( 8 == VG_ROUNDUP(5, 8) );
CHECK( 8 == VG_ROUNDUP(6, 8) );
CHECK( 8 == VG_ROUNDUP(7, 8) );
CHECK( 0 == VG_PGROUNDDN(0) );
CHECK( 0 == VG_PGROUNDDN(1) );
CHECK( 0 == VG_PGROUNDDN(2) );
CHECK( 0 == VG_PGROUNDDN(3) );
CHECK( 0 == VG_PGROUNDDN(4) );
CHECK( 0 == VG_PGROUNDDN(VKI_PAGE_SIZE-1) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDDN(VKI_PAGE_SIZE ) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDDN(VKI_PAGE_SIZE+1) );
CHECK( 0 == VG_PGROUNDUP(0) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(1) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(2) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(3) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(4) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(VKI_PAGE_SIZE-1) );
CHECK( VKI_PAGE_SIZE == VG_PGROUNDUP(VKI_PAGE_SIZE ) );
CHECK( VKI_PAGE_SIZE*2 == VG_PGROUNDUP(VKI_PAGE_SIZE+1) );
}
void test_isspace(void)
{
CHECK( VG_(isspace)(' ') );
CHECK( VG_(isspace)('\n') );
CHECK( VG_(isspace)('\t') );
CHECK( ! VG_(isspace)('3') );
CHECK( ! VG_(isspace)('x') );
}
void test_isdigit(void)
{
CHECK( VG_(isdigit)('0') );
CHECK( VG_(isdigit)('1') );
CHECK( VG_(isdigit)('5') );
CHECK( VG_(isdigit)('9') );
CHECK( ! VG_(isdigit)('a') );
CHECK( ! VG_(isdigit)('!') );
}
void test_is_dec_digit()
{
Long x;
CHECK( is_dec_digit('0', &x) && 0 == x );
CHECK( is_dec_digit('1', &x) && 1 == x );
CHECK( is_dec_digit('9', &x) && 9 == x );
}
void test_is_hex_digit()
{
Long x;
CHECK( is_hex_digit('0', &x) && 0 == x );
CHECK( is_hex_digit('1', &x) && 1 == x );
CHECK( is_hex_digit('9', &x) && 9 == x );
CHECK( is_hex_digit('a', &x) && 10 == x );
CHECK( is_hex_digit('f', &x) && 15 == x );
CHECK( is_hex_digit('A', &x) && 10 == x );
CHECK( is_hex_digit('F', &x) && 15 == x );
}
void test_strtoll_and_strtod(void)
{
// For VG_(strtoll*)()
typedef struct {
Char* str; // The string to convert.
Long res; // The result.
Char endptr_val; // The char one past the end of the converted text.
} StrtollInputs;
// VG_(strtoll10)()
{
StrtollInputs a[] = {
// If there's no number at the head of the string, return 0, and
// make 'endptr' point to the start of the string.
{ .str = "", .res = 0, .endptr_val = '\0' },
{ .str = " \n\t", .res = 0, .endptr_val = ' ' },
{ .str = "one", .res = 0, .endptr_val = 'o' },
{ .str = "\ntwo", .res = 0, .endptr_val = '\n' },
// Successful conversion. Leading whitespace is ignored. A single
// '-' or '+' is accepted.
{ .str = "0", .res = 0, .endptr_val = '\0' },
{ .str = "+0", .res = 0, .endptr_val = '\0' },
{ .str = "-0", .res = 0, .endptr_val = '\0' },
{ .str = "1", .res = 1, .endptr_val = '\0' },
{ .str = "+1", .res = 1, .endptr_val = '\0' },
{ .str = "-1", .res = -1, .endptr_val = '\0' },
{ .str = "12", .res = 12, .endptr_val = '\0' },
{ .str = "-567", .res = -567, .endptr_val = '\0' },
{ .str = "1234567", .res = 1234567, .endptr_val = '\0' },
{ .str = "007", .res = 7, .endptr_val = '\0' },
{ .str = " +42", .res = 42, .endptr_val = '\0' },
{ .str = "\n\t\r\v -56", .res = -56, .endptr_val = '\0' },
{ .str = "123xyz", .res = 123, .endptr_val = 'x' },
{ .str = " -123abc", .res = -123, .endptr_val = 'a' },
// Whitespace after the +/- is not allowed; conversion fails.
{ .str = "+ 1", .res = 0, .endptr_val = '+' },
{ .str = "-\n1", .res = 0, .endptr_val = '-' },
};
// Nb: We test the results against strtoll() as well.
int i;
for (i = 0; i < (sizeof(a) / sizeof(StrtollInputs)); i++) {
Char* endptr1;
char* endptr2;
Long res1 = VG_(strtoll10)(a[i].str, &endptr1);
long long res2 = strtoll (a[i].str, &endptr2, 10);
//printf("res1 = %lld, *endptr1 = '%c'\n", res1, *endptr1);
//printf("res2 = %lld, *endptr2 = '%c'\n", res2, *endptr2);
CHECK(a[i].res == res1 && a[i].endptr_val == *endptr1);
CHECK(res2 == res1 && *endptr2 == *endptr1);
}
}
// VG_(strtoll16)()
{
StrtollInputs a[] = {
// If there's no number at the head of the string, return 0, and
// make 'endptr' point to the start of the string.
{ .str = "", .res = 0, .endptr_val = '\0' },
{ .str = " \n\t", .res = 0, .endptr_val = ' ' },
{ .str = "one", .res = 0, .endptr_val = 'o' },
{ .str = "\ntwo", .res = 0, .endptr_val = '\n' },
// Successful conversion. Leading whitespace is ignored. A single
// '-' or '+' is accepted. "0X" and "0x" are also allowed at the
// front, but if no digits follow, just the "0" is converted.
{ .str = "0", .res = 0, .endptr_val = '\0' },
{ .str = "0x0", .res = 0, .endptr_val = '\0' },
{ .str = "0X0", .res = 0, .endptr_val = '\0' },
{ .str = "0x", .res = 0, .endptr_val = 'x' },
{ .str = "0Xg", .res = 0, .endptr_val = 'X' },
{ .str = "0", .res = 0, .endptr_val = '\0' },
{ .str = "+0", .res = 0, .endptr_val = '\0' },
{ .str = "-0", .res = 0, .endptr_val = '\0' },
{ .str = "1", .res = 1, .endptr_val = '\0' },
{ .str = "+1", .res = 1, .endptr_val = '\0' },
{ .str = "-1", .res = -1, .endptr_val = '\0' },
{ .str = "1a", .res = 26, .endptr_val = '\0' },
{ .str = "-5F7", .res = -1527, .endptr_val = '\0' },
{ .str = "0x1234567", .res = 19088743, .endptr_val = '\0' },
{ .str = "007", .res = 7, .endptr_val = '\0' },
{ .str = "0X00ABCD", .res = 43981, .endptr_val = '\0' },
{ .str = " +AbC", .res = 2748, .endptr_val = '\0' },
{ .str = " -0xAbC", .res = -2748, .endptr_val = '\0' },
{ .str = " -0xxx", .res = 0, .endptr_val = 'x' },
{ .str = "\n\t\r\v -56", .res = -86, .endptr_val = '\0' },
{ .str = "123xyz", .res = 291, .endptr_val = 'x' },
{ .str = " -123defghi", .res = -1195503, .endptr_val = 'g' },
// Whitespace after the +/- is not allowed; conversion fails.
{ .str = "+ 1", .res = 0, .endptr_val = '+' },
{ .str = "-\n0x1", .res = 0, .endptr_val = '-' },
};
// Nb: We test the results against strtoll() as well.
int i;
for (i = 0; i < (sizeof(a) / sizeof(StrtollInputs)); i++) {
Char* endptr1;
char* endptr2;
Long res1 = VG_(strtoll16)(a[i].str, &endptr1);
long long res2 = strtoll (a[i].str, &endptr2, 16);
//printf(" res1 = %lld, *endptr1 = '%c'\n", res1, *endptr1);
//printf(" res2 = %lld, *endptr2 = '%c'\n", res2, *endptr2);
CHECK(a[i].res == res1 && a[i].endptr_val == *endptr1);
CHECK(res2 == res1 && *endptr2 == *endptr1);
}
}
// VG_(strtod)()
// XXX: todo
}
void test_log2(void)
{
CHECK( -1 == VG_(log2)(0) );
CHECK( 0 == VG_(log2)(1) );
CHECK( 1 == VG_(log2)(2) );
CHECK( -1 == VG_(log2)(3) );
CHECK( 2 == VG_(log2)(4) );
CHECK( -1 == VG_(log2)(5) );
CHECK( -1 == VG_(log2)(6) );
CHECK( -1 == VG_(log2)(7) );
CHECK( 3 == VG_(log2)(8) );
CHECK( -1 == VG_(log2)( 15) );
CHECK( 4 == VG_(log2)( 16) );
CHECK( -1 == VG_(log2)( 17) );
CHECK( -1 == VG_(log2)( 63) );
CHECK( 6 == VG_(log2)( 64) );
CHECK( -1 == VG_(log2)( 65) );
CHECK( -1 == VG_(log2)(255) );
CHECK( 8 == VG_(log2)(256) );
CHECK( -1 == VG_(log2)(257) );
CHECK( -1 == VG_(log2)(65535) );
CHECK( 16 == VG_(log2)(65536) );
CHECK( -1 == VG_(log2)(65537) );
CHECK( -1 == VG_(log2)(16777215) );
CHECK( 24 == VG_(log2)(16777216) );
CHECK( -1 == VG_(log2)(16777217) );
CHECK( -1 == VG_(log2)(2147483647U) );
CHECK( 31 == VG_(log2)(2147483648U) );
CHECK( -1 == VG_(log2)(2147483649U) );
CHECK( -1 == VG_(log2)(4294967295U) ); // Max UInt
}
void test_random(void)
{
// Hmm, it's really hard to unit test a pseudo-random number generator.
// So no testing here, sorry.
}
//-----------------------------------------------------------------------
// main
//-----------------------------------------------------------------------
int main(void)
{
// Nb: the order of the tests is based on the order of the code in
// m_libcbase.c, except that macros defined in pub_tool_libcbase.h are
// tested first.
//--------------------------------------------------------------------
// pub_tool_libcbase.h macros
//--------------------------------------------------------------------
test_VG_STREQ();
test_VG_STREQN();
test_VG_IS_XYZ_ALIGNED();
test_VG_ROUND_et_al();
//--------------------------------------------------------------------
// Char functions
//--------------------------------------------------------------------
test_isspace();
test_isdigit();
//--------------------------------------------------------------------
// String-to-number functions
//--------------------------------------------------------------------
test_is_dec_digit();
test_is_hex_digit();
test_strtoll_and_strtod();
//--------------------------------------------------------------------
// String functions
//--------------------------------------------------------------------
// XXX: more todo: VG_(str_*)
//--------------------------------------------------------------------
// Mem functions
//--------------------------------------------------------------------
// XXX: todo: VG_(mem*)
//--------------------------------------------------------------------
// Miscellaneous functions
//--------------------------------------------------------------------
// XXX: todo: VG_(ssort)
test_log2();
test_random();
return 0;
}