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/* See LICENSE file for copyright and license details. */
#include "common.h"
#include <errno.h>
#ifndef TEST
/* TODO Add man page */
int
libj2_str_to_j2i(const char *s, size_t slen, char **end, const char *digits1, const char *digits2, struct libj2_j2i *a)
{
struct libj2_j2u u;
int neg, r;
r = libj2_str_to_j2u_sign(s, slen, end, digits1, digits2, &u, &neg);
switch (r) {
case 0:
break;
overflow:
r = ERANGE;
/* fall-through */
case ERANGE:
if (neg)
libj2_j2i_min(a);
else
libj2_j2i_max(a);
/* fall-through */
default:
return r;
}
if (neg) {
#if defined(LIBJ2_USE_GCC_INTRINSIC_FUNCTIONS_)
if (libj2_co_j2u(&u) > 1U)
goto may_overflow;
#else
if (u.high) {
if (u.low)
goto may_overflow;
if (u.high & (u.high - 1U))
goto may_overflow;
} else {
if (u.low & (u.low - 1U))
goto may_overflow;
}
#endif
if (0) {
may_overflow:
if (libj2_j2u_test_bit(&u, LIBJ2_J2U_BIT - 1U))
goto overflow;
}
libj2_minus_j2u_to_j2i(&u, a);
} else {
if (libj2_j2u_test_bit(&u, LIBJ2_J2U_BIT - 1U))
goto overflow;
libj2_j2u_to_j2i(&u, a);
}
return r;
}
#else
int
main(void)
{
/* Primarily tested via libj2_str_to_j2u(_sign) */
char buf[128U + LIBJ2_J2U_BIT];
struct libj2_j2i a, a_saved;
struct libj2_j2u u;
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, 123));
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("+123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, 123));
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("-123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, -123));
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("--123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, 123));
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("-+-123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, 123));
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_str_to_j2i("---123", SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_ji(&a, -123));
libj2_j2i_max(&a);
a_saved = a;
libj2_j2i_to_j2u(&a, &u);
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_j2u_to_str(&u, buf, sizeof(buf), NULL) < sizeof(buf));
EXPECT(libj2_str_to_j2i(buf, SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_j2i(&a, &a_saved));
libj2_j2i_min(&a);
a_saved = a;
libj2_minus_j2i_to_j2u(&a, &u);
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_j2u_to_str(&u, &buf[1], sizeof(buf) - 1U, NULL) < sizeof(buf) - 1U);
buf[0] = '-';
EXPECT(libj2_str_to_j2i(buf, SIZE_MAX, NULL, NULL, NULL, &a) == 0);
EXPECT(libj2_j2i_eq_j2i(&a, &a_saved));
libj2_j2i_max(&a);
a_saved = a;
libj2_j2i_to_j2u(&a, &u);
libj2_j2u_add_ju(&u, 1);
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_j2u_to_str(&u, buf, sizeof(buf), NULL) < sizeof(buf));
EXPECT(libj2_str_to_j2i(buf, SIZE_MAX, NULL, NULL, NULL, &a) == ERANGE);
EXPECT(libj2_j2i_eq_j2i(&a, &a_saved));
libj2_j2i_min(&a);
a_saved = a;
libj2_minus_j2i_to_j2u(&a, &u);
libj2_j2u_add_ju(&u, 1);
a = (struct libj2_j2i){111, 222};
EXPECT(libj2_j2u_to_str(&u, &buf[1], sizeof(buf) - 1U, NULL) < sizeof(buf) - 1U);
buf[0] = '-';
EXPECT(libj2_str_to_j2i(buf, SIZE_MAX, NULL, NULL, NULL, &a) == ERANGE);
EXPECT(libj2_j2i_eq_j2i(&a, &a_saved));
return 0;
}
#endif
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