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Add a way to disable history

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This commit is contained in:
Baptiste Wicht 2013-12-03 18:02:41 +01:00
parent c7717a8ea8
commit 40a9f18219
2 changed files with 64 additions and 44 deletions
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3
kernel/Makefile
View File

@ -3,9 +3,10 @@ default: kernel.bin
CC=x86_64-elf-g++
AS=x86_64-elf-as
THOR_FLAGS=-DCONFIG_HISTORY=y
WARNING_FLAGS=-Wall -Wextra -pedantic -Wold-style-cast -Wshadow
CPP_FLAGS=-masm=intel -Iinclude/ -nostdlib -Os -std=c++11 -fno-exceptions -fno-rtti -ffreestanding -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow $(WARNING_FLAGS)
KERNEL_FLAGS=$(CPP_FLAGS)
KERNEL_FLAGS=$(CPP_FLAGS) $(THOR_FLAGS)
KERNEL_LINK_FLAGS=-lgcc -T linker.ld $(CPP_FLAGS)
KERNEL_CPP_FILES=$(wildcard src/*.cpp)

105
kernel/src/shell.cpp
View File

@ -23,8 +23,14 @@
namespace {
#ifdef CONFIG_HISTORY
static constexpr bool History = true;
#else
static constexpr bool History = false;
#endif
vector<char*> history;
uint64_t history_index;
uint64_t history_index = 0;
bool shift = false;
@ -79,6 +85,59 @@ char current_input[50];
void exec_command();
template<bool Enable = History>
void history_key(char key){
if(history.size() > 0){
if(key == keyboard::KEY_UP){
if(history_index == 0){
return;
}
--history_index;
} else { //KEY_DOWN
if(history_index == history.size()){
return;
}
++history_index;
}
set_column(6);
for(uint64_t i = 0; i < current_input_length; ++i){
k_print(' ');
}
set_column(6);
current_input_length = 0;
if(history_index < history.size()){
auto saved = history[history_index];
while(*saved){
current_input[current_input_length++] = *saved;
k_print(*saved);
++saved;
}
}
}
}
template<> void history_key<false>(char){}
template<bool Enable = History>
void history_save(){
auto saved = new char[current_input_length + 1];
memcopy(saved, current_input, current_input_length);
saved[current_input_length] = '\0';
history.push_back(saved);
history_index = history.size();
}
template<> void history_save<false>(){}
void start_shell(){
while(true){
auto key = keyboard::get_char();
@ -112,41 +171,7 @@ void start_shell(){
} else if(key == keyboard::KEY_LEFT_SHIFT || key == keyboard::KEY_RIGHT_SHIFT){
shift = true;
} else if(key == keyboard::KEY_UP || key == keyboard::KEY_DOWN){
if(history.size() > 0){
if(key == keyboard::KEY_UP){
if(history_index == 0){
continue;
}
--history_index;
} else { //KEY_DOWN
if(history_index == history.size()){
continue;
}
++history_index;
}
set_column(6);
for(uint64_t i = 0; i < current_input_length; ++i){
k_print(' ');
}
set_column(6);
current_input_length = 0;
if(history_index < history.size()){
auto saved = history[history_index];
while(*saved){
current_input[current_input_length++] = *saved;
k_print(*saved);
++saved;
}
}
}
history_key(key);
} else if(key == keyboard::KEY_BACKSPACE){
if(current_input_length > 0){
k_print('\b');
@ -172,12 +197,7 @@ void start_shell(){
void exec_command(){
char buffer[50];
auto saved = new char[current_input_length + 1];
memcopy(saved, current_input, current_input_length);
saved[current_input_length] = '\0';
history.push_back(saved);
history_index = history.size();
history_save();
for(auto& command : commands){
const char* input_command = current_input;
@ -495,7 +515,6 @@ void cd_command(const vector<string>& params){
void init_shell(){
current_input_length = 0;
history_index = 0;
wipeout();