/* vi: set sw=4 ts=4: */
/*
 * ascii-to-numbers implementations for busybox
 *
 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2, see file LICENSE in this tarball for details.
 */

#if __GNUC_PREREQ(4,1)
# pragma GCC visibility push(hidden)
#endif

/* Provides extern declarations of functions */
#define DECLARE_STR_CONV(type, T, UT) \
\
unsigned type xstrto##UT##_range_sfx(const char *str, int b, unsigned type l, unsigned type u, const struct suffix_mult *sfx) FAST_FUNC; \
unsigned type xstrto##UT##_range(const char *str, int b, unsigned type l, unsigned type u) FAST_FUNC; \
unsigned type xstrto##UT##_sfx(const char *str, int b, const struct suffix_mult *sfx) FAST_FUNC; \
unsigned type xstrto##UT(const char *str, int b) FAST_FUNC; \
unsigned type xato##UT##_range_sfx(const char *str, unsigned type l, unsigned type u, const struct suffix_mult *sfx) FAST_FUNC; \
unsigned type xato##UT##_range(const char *str, unsigned type l, unsigned type u) FAST_FUNC; \
unsigned type xato##UT##_sfx(const char *str, const struct suffix_mult *sfx) FAST_FUNC; \
unsigned type xato##UT(const char *str) FAST_FUNC; \
type xstrto##T##_range_sfx(const char *str, int b, type l, type u, const struct suffix_mult *sfx) FAST_FUNC; \
type xstrto##T##_range(const char *str, int b, type l, type u) FAST_FUNC; \
type xato##T##_range_sfx(const char *str, type l, type u, const struct suffix_mult *sfx) FAST_FUNC; \
type xato##T##_range(const char *str, type l, type u) FAST_FUNC; \
type xato##T##_sfx(const char *str, const struct suffix_mult *sfx) FAST_FUNC; \
type xato##T(const char *str) FAST_FUNC; \

/* Unsigned long long functions always exist */
DECLARE_STR_CONV(long long, ll, ull)


/* Provides inline definitions of functions */
/* (useful for mapping them to the type of the same width) */
#define DEFINE_EQUIV_STR_CONV(narrow, N, W, UN, UW) \
\
static ALWAYS_INLINE \
unsigned narrow xstrto##UN##_range_sfx(const char *str, int b, unsigned narrow l, unsigned narrow u, const struct suffix_mult *sfx) \
{ return xstrto##UW##_range_sfx(str, b, l, u, sfx); } \
static ALWAYS_INLINE \
unsigned narrow xstrto##UN##_range(const char *str, int b, unsigned narrow l, unsigned narrow u) \
{ return xstrto##UW##_range(str, b, l, u); } \
static ALWAYS_INLINE \
unsigned narrow xstrto##UN##_sfx(const char *str, int b, const struct suffix_mult *sfx) \
{ return xstrto##UW##_sfx(str, b, sfx); } \
static ALWAYS_INLINE \
unsigned narrow xstrto##UN(const char *str, int b) \
{ return xstrto##UW(str, b); } \
static ALWAYS_INLINE \
unsigned narrow xato##UN##_range_sfx(const char *str, unsigned narrow l, unsigned narrow u, const struct suffix_mult *sfx) \
{ return xato##UW##_range_sfx(str, l, u, sfx); } \
static ALWAYS_INLINE \
unsigned narrow xato##UN##_range(const char *str, unsigned narrow l, unsigned narrow u) \
{ return xato##UW##_range(str, l, u); } \
static ALWAYS_INLINE \
unsigned narrow xato##UN##_sfx(const char *str, const struct suffix_mult *sfx) \
{ return xato##UW##_sfx(str, sfx); } \
static ALWAYS_INLINE \
unsigned narrow xato##UN(const char *str) \
{ return xato##UW(str); } \
static ALWAYS_INLINE \
narrow xstrto##N##_range_sfx(const char *str, int b, narrow l, narrow u, const struct suffix_mult *sfx) \
{ return xstrto##W##_range_sfx(str, b, l, u, sfx); } \
static ALWAYS_INLINE \
narrow xstrto##N##_range(const char *str, int b, narrow l, narrow u) \
{ return xstrto##W##_range(str, b, l, u); } \
static ALWAYS_INLINE \
narrow xato##N##_range_sfx(const char *str, narrow l, narrow u, const struct suffix_mult *sfx) \
{ return xato##W##_range_sfx(str, l, u, sfx); } \
static ALWAYS_INLINE \
narrow xato##N##_range(const char *str, narrow l, narrow u) \
{ return xato##W##_range(str, l, u); } \
static ALWAYS_INLINE \
narrow xato##N##_sfx(const char *str, const struct suffix_mult *sfx) \
{ return xato##W##_sfx(str, sfx); } \
static ALWAYS_INLINE \
narrow xato##N(const char *str) \
{ return xato##W(str); } \

/* If long == long long, then just map them one-to-one */
#if ULONG_MAX == ULLONG_MAX
DEFINE_EQUIV_STR_CONV(long, l, ll, ul, ull)
#else
/* Else provide extern defs */
DECLARE_STR_CONV(long, l, ul)
#endif

/* Same for int -> [long] long */
#if UINT_MAX == ULLONG_MAX
DEFINE_EQUIV_STR_CONV(int, i, ll, u, ull)
#elif UINT_MAX == ULONG_MAX
DEFINE_EQUIV_STR_CONV(int, i, l, u, ul)
#else
DECLARE_STR_CONV(int, i, u)
#endif

/* Specialized */

int BUG_xatou32_unimplemented(void);
static ALWAYS_INLINE uint32_t xatou32(const char *numstr)
{
	if (UINT_MAX == 0xffffffff)
		return xatou(numstr);
	if (ULONG_MAX == 0xffffffff)
		return xatoul(numstr);
	return BUG_xatou32_unimplemented();
}

/* Non-aborting kind of convertors: bb_strto[u][l]l */

/* On exit: errno = 0 only if there was non-empty, '\0' terminated value
 * errno = EINVAL if value was not '\0' terminated, but otherwise ok
 *    Return value is still valid, caller should just check whether end[0]
 *    is a valid terminating char for particular case. OTOH, if caller
 *    requires '\0' terminated input, [s]he can just check errno == 0.
 * errno = ERANGE if value had alphanumeric terminating char ("1234abcg").
 * errno = ERANGE if value is out of range, missing, etc.
 * errno = ERANGE if value had minus sign for strtouXX (even "-0" is not ok )
 *    return value is all-ones in this case.
 */

unsigned long long bb_strtoull(const char *arg, char **endp, int base) FAST_FUNC;
long long bb_strtoll(const char *arg, char **endp, int base) FAST_FUNC;

#if ULONG_MAX == ULLONG_MAX
static ALWAYS_INLINE
unsigned long bb_strtoul(const char *arg, char **endp, int base)
{ return bb_strtoull(arg, endp, base); }
static ALWAYS_INLINE
long bb_strtol(const char *arg, char **endp, int base)
{ return bb_strtoll(arg, endp, base); }
#else
unsigned long bb_strtoul(const char *arg, char **endp, int base) FAST_FUNC;
long bb_strtol(const char *arg, char **endp, int base) FAST_FUNC;
#endif

#if UINT_MAX == ULLONG_MAX
static ALWAYS_INLINE
unsigned bb_strtou(const char *arg, char **endp, int base)
{ return bb_strtoull(arg, endp, base); }
static ALWAYS_INLINE
int bb_strtoi(const char *arg, char **endp, int base)
{ return bb_strtoll(arg, endp, base); }
#elif UINT_MAX == ULONG_MAX
static ALWAYS_INLINE
unsigned bb_strtou(const char *arg, char **endp, int base)
{ return bb_strtoul(arg, endp, base); }
static ALWAYS_INLINE
int bb_strtoi(const char *arg, char **endp, int base)
{ return bb_strtol(arg, endp, base); }
#else
unsigned bb_strtou(const char *arg, char **endp, int base) FAST_FUNC;
int bb_strtoi(const char *arg, char **endp, int base) FAST_FUNC;
#endif

int BUG_bb_strtou32_unimplemented(void);
static ALWAYS_INLINE
uint32_t bb_strtou32(const char *arg, char **endp, int base)
{
	if (sizeof(uint32_t) == sizeof(unsigned))
		return bb_strtou(arg, endp, base);
	if (sizeof(uint32_t) == sizeof(unsigned long))
		return bb_strtoul(arg, endp, base);
	return BUG_bb_strtou32_unimplemented();
}

/* Floating point */

double bb_strtod(const char *arg, char **endp) FAST_FUNC;

#if __GNUC_PREREQ(4,1)
# pragma GCC visibility pop
#endif