83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/****************************************************************************
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** Copyright (c) 2017, Fougue Ltd. <http://www.fougue.pro>
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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**
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** 2. Redistributions in binary form must reproduce the above
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** copyright notice, this list of conditions and the following
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** disclaimer in the documentation and/or other materials provided
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** with the distribution.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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****************************************************************************/
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#pragma once
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#include "../global.h"
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#include <stddef.h>
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/*! Stores a read-only string of 8-bit chars.
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* For faster lookups, it knowns the length of its contents.
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*/
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struct gmio_const_string
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{
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const char* ptr; /*!< Contents */
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size_t len; /*!< Size(length) of current contents */
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};
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/*! Expands to bracket initialization of a gmio_const_string from const char[]
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*
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* Example:
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* \code{.c}
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* static const char token[] = "woops";
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* struct gmio_const_string token_s = GMIO_CONST_STRING_FROM_ARRAY(token);
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* \endcode
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*/
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#define GMIO_CONST_STRING_FROM_ARRAY(array) { &(array)[0], sizeof(array) - 1 }
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/*! Returns an initialized gmio_const_string object */
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GMIO_INLINE struct gmio_const_string gmio_const_string(const char* ptr, size_t len);
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/*! Returns \c true if \p str has no characters, otherwise returns \c false */
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GMIO_INLINE bool gmio_const_string_is_empty(const struct gmio_const_string* str);
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/*! Concatenates \p lhs + \p rhs into destination string \p dst and returns
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* total string length */
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size_t gmio_const_string_concat(
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char* dst, size_t dst_capacity,
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const struct gmio_const_string* lhs,
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const struct gmio_const_string* rhs);
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/*
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* -- Implementation
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*/
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struct gmio_const_string gmio_const_string(const char* ptr, size_t len)
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{
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struct gmio_const_string cstr;
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cstr.ptr = ptr;
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cstr.len = len;
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return cstr;
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}
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bool gmio_const_string_is_empty(const struct gmio_const_string* str)
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{
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return str->ptr == NULL || str->len == 0;
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}
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