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LibC: Implement ungetwc()
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14b91a3fe9
commit
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7 changed files with 63 additions and 18 deletions
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@ -4,9 +4,11 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Array.h>
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#include <AK/Types.h>
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#include <LibC/bits/FILE.h>
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#include <LibC/bits/pthread_integration.h>
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#include <LibC/bits/wchar.h>
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#include <sys/types.h>
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#pragma once
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@ -85,6 +87,9 @@ private:
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bool enqueue_front(u8 byte);
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private:
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constexpr static auto unget_buffer_size = MB_CUR_MAX;
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constexpr static u32 ungotten_mask = ((u32)0xffffffff) >> (sizeof(u32) * 8 - unget_buffer_size);
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// Note: the fields here are arranged this way
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// to make sizeof(Buffer) smaller.
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u8* m_data { nullptr };
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@ -93,8 +98,8 @@ private:
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size_t m_end { 0 };
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int m_mode { -1 };
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u8 m_unget_buffer { 0 };
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bool m_ungotten : 1 { false };
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Array<u8, unget_buffer_size> m_unget_buffer { 0 };
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u32 m_ungotten : unget_buffer_size { 0 };
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bool m_data_is_malloced : 1 { false };
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// When m_begin == m_end, we want to distinguish whether
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// the buffer is full or empty.
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10
Userland/Libraries/LibC/bits/wchar.h
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10
Userland/Libraries/LibC/bits/wchar.h
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@ -0,0 +1,10 @@
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/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#define MB_CUR_MAX 4
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#define MB_LEN_MAX 16
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