e4e1c9f413
This commit extracts from the current float parsing code two functions which could be reused elsewhere in MicroPython. The code used to multiply a float x by a power of 10 is also simplified by applying the binary exponent separately from the power of 5. This avoids the risk of overflow in the intermediate stage, before multiplying by x. Signed-off-by: Yoctopuce dev <dev@yoctopuce.com>
57 lines
2.3 KiB
C
57 lines
2.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_PY_PARSENUM_H
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#define MICROPY_INCLUDED_PY_PARSENUM_H
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#include "py/mpconfig.h"
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#include "py/lexer.h"
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#include "py/obj.h"
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// these functions raise a SyntaxError if lex!=NULL, else a ValueError
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mp_obj_t mp_parse_num_integer(const char *restrict str, size_t len, int base, mp_lexer_t *lex);
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#if MICROPY_PY_BUILTINS_FLOAT
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mp_float_t mp_decimal_exp(mp_float_t num, int dec_exp);
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const char *mp_parse_float_internal(const char *str, size_t len, mp_float_t *res);
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#endif
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#if MICROPY_PY_BUILTINS_COMPLEX
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mp_obj_t mp_parse_num_decimal(const char *str, size_t len, bool allow_imag, bool force_complex, mp_lexer_t *lex);
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static inline mp_obj_t mp_parse_num_float(const char *str, size_t len, bool allow_imag, mp_lexer_t *lex) {
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return mp_parse_num_decimal(str, len, allow_imag, false, lex);
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}
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static inline mp_obj_t mp_parse_num_complex(const char *str, size_t len, mp_lexer_t *lex) {
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return mp_parse_num_decimal(str, len, true, true, lex);
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}
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#else
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mp_obj_t mp_parse_num_float(const char *str, size_t len, bool allow_imag, mp_lexer_t *lex);
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#endif
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#endif // MICROPY_INCLUDED_PY_PARSENUM_H
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