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53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/*
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* TINYEXPR - Tiny recursive descent parser and evaluation engine in C
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*
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* Copyright (c) 2015, 2016 Lewis Van Winkle
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*
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* http://CodePlea.com
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgement in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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// This version was altered and ported to C++ for inclusion in fish.
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#ifndef __TINYEXPR_H__
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#define __TINYEXPR_H__
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typedef enum {
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TE_ERROR_NONE = 0,
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TE_ERROR_UNKNOWN_FUNCTION = 1,
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TE_ERROR_MISSING_CLOSING_PAREN = 2,
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TE_ERROR_MISSING_OPENING_PAREN = 3,
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TE_ERROR_TOO_FEW_ARGS = 4,
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TE_ERROR_TOO_MANY_ARGS = 5,
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TE_ERROR_MISSING_OPERATOR = 6,
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TE_ERROR_UNEXPECTED_TOKEN = 7,
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TE_ERROR_LOGICAL_OPERATOR = 8,
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TE_ERROR_UNKNOWN = 9
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} te_error_type_t;
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typedef struct te_error_t {
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te_error_type_t type;
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int position;
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} te_error_t;
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/* Parses the input expression, evaluates it, and frees it. */
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/* Returns NaN on error. */
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double te_interp(const char *expression, te_error_t *error);
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#endif /*__TINYEXPR_H__*/
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