mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-26 19:22:30 -05:00
c70f45ff44
This commit moves the length calculations out to be directly on the StringView users. This is an important step towards the goal of removing StringView(char const*), as it moves the responsibility of calculating the size of the string to the user of the StringView (which will prevent naive uses causing OOB access).
132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <assert.h>
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#include <string.h>
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#include <termcap.h>
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extern "C" {
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char PC;
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char* UP;
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char* BC;
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int __attribute__((weak)) tgetent([[maybe_unused]] char* bp, [[maybe_unused]] char const* name)
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{
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warnln_if(TERMCAP_DEBUG, "tgetent: bp={:p}, name='{}'", bp, name);
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PC = '\0';
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BC = const_cast<char*>("\033[D");
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UP = const_cast<char*>("\033[A");
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return 1;
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}
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static HashMap<String, char const*>* caps = nullptr;
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static void ensure_caps()
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{
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if (caps)
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return;
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caps = new HashMap<String, char const*>;
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caps->set("DC", "\033[%p1%dP");
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caps->set("IC", "\033[%p1%d@");
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caps->set("ce", "\033[K");
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caps->set("cl", "\033[H\033[J");
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caps->set("cr", "\015");
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caps->set("dc", "\033[P");
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caps->set("ei", "");
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caps->set("ic", "");
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caps->set("im", "");
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caps->set("kd", "\033[B");
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caps->set("kl", "\033[D");
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caps->set("kr", "\033[C");
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caps->set("ku", "\033[A");
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caps->set("ks", "");
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caps->set("ke", "");
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caps->set("le", "\033[D");
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caps->set("mm", "");
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caps->set("mo", "");
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caps->set("pc", "");
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caps->set("up", "\033[A");
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caps->set("vb", "");
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caps->set("am", "");
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caps->set("@7", "");
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caps->set("kH", "");
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caps->set("kI", "\033[L");
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caps->set("kh", "\033[H");
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caps->set("vs", "");
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caps->set("ve", "");
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caps->set("E3", "");
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caps->set("kD", "");
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caps->set("nd", "\033[C");
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caps->set("co", "80");
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caps->set("li", "25");
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}
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// Unfortunately, tgetstr() doesn't accept a size argument for the buffer
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// pointed to by area, so we have to use bare strcpy().
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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char* __attribute__((weak)) tgetstr(char const* id, char** area)
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{
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ensure_caps();
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warnln_if(TERMCAP_DEBUG, "tgetstr: id='{}'", id);
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auto it = caps->find(id);
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if (it != caps->end()) {
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char* ret = *area;
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char const* val = (*it).value;
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strcpy(*area, val);
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*area += strlen(val) + 1;
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return ret;
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}
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warnln_if(TERMCAP_DEBUG, "tgetstr: missing cap id='{}'", id);
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return nullptr;
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}
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#pragma GCC diagnostic pop
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int __attribute__((weak)) tgetflag([[maybe_unused]] char const* id)
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{
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warnln_if(TERMCAP_DEBUG, "tgetflag: '{}'", id);
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auto it = caps->find(id);
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if (it != caps->end())
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return 1;
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return 0;
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}
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int __attribute__((weak)) tgetnum(char const* id)
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{
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warnln_if(TERMCAP_DEBUG, "tgetnum: '{}'", id);
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auto it = caps->find(id);
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if (it != caps->end())
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return atoi((*it).value);
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return -1;
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}
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static Vector<char> s_tgoto_buffer;
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char* __attribute__((weak)) tgoto([[maybe_unused]] char const* cap, [[maybe_unused]] int col, [[maybe_unused]] int row)
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{
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auto cap_str = StringView { cap, strlen(cap) }.replace("%p1%d"sv, String::number(col), ReplaceMode::FirstOnly).replace("%p2%d"sv, String::number(row), ReplaceMode::FirstOnly);
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s_tgoto_buffer.clear_with_capacity();
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s_tgoto_buffer.ensure_capacity(cap_str.length());
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(void)cap_str.copy_characters_to_buffer(s_tgoto_buffer.data(), cap_str.length());
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return s_tgoto_buffer.data();
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}
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int __attribute__((weak)) tputs(char const* str, [[maybe_unused]] int affcnt, int (*putc)(int))
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{
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size_t len = strlen(str);
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for (size_t i = 0; i < len; ++i)
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putc(str[i]);
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return 0;
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}
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}
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