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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef util_DoubleToString_h
#define util_DoubleToString_h
/*
* Public interface to portable double-precision floating point to string
* and back conversion package.
*/
#include <stddef.h>
struct DtoaState;
namespace js {
extern DtoaState* NewDtoaState();
extern void DestroyDtoaState(DtoaState* state);
} // namespace js
/*
* js_strtod_harder() returns as a double-precision floating-point number the
* value represented by the character string pointed to by s00. The string is
* scanned up to the first unrecognized character.
*
* If se is not nullptr, *se receives a pointer to the character terminating
* the scan. If no number can be formed, *se receives a pointer to the first
* unparseable character in s00, and zero is returned.
*
* On overflow, this function returns infinity and does not indicate an error.
*/
double js_strtod_harder(DtoaState* state, const char* s00, char** se);
/* Maximum number of characters (including trailing null) that a DTOSTR_STANDARD
* or DTOSTR_STANDARD_EXPONENTIAL conversion can produce. This maximum is
* reached for a number like -0.0000012345678901234567. */
#define DTOSTR_STANDARD_BUFFER_SIZE 26
/*
* DO NOT USE THIS FUNCTION IF YOU CAN AVOID IT. js::NumberToCString() is a
* better function to use.
*
* Convert d to a string in the given base. The integral part of d will be
* printed exactly in that base, regardless of how large it is, because there
* is no exponential notation for non-base-ten numbers. The fractional part
* will be rounded to as few digits as possible while still preserving the
* round-trip property (analogous to that of printing decimal numbers). In
* other words, if one were to read the resulting string in via a hypothetical
* base-number-reading routine that rounds to the nearest IEEE double (and to
* an even significand if there are two equally near doubles), then the result
* would equal d (except for -0.0, which converts to "0", and NaN, which is
* not equal to itself).
*
* Return nullptr if out of memory. If the result is not nullptr, it must be
* released via js_free().
*/
char* js_dtobasestr(DtoaState* state, int base, double d);
#endif /* util_DoubleToString_h */