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Signed-off-by: Javier Balloffet <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| // BSD 3-Clause License | ||
| // | ||
| // Copyright (c) 2023, Ekumen Inc. | ||
| // All rights reserved. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are met: | ||
| // | ||
| // 1. Redistributions of source code must retain the above copyright notice, this | ||
| // list of conditions and the following disclaimer. | ||
| // | ||
| // 2. Redistributions in binary form must reproduce the above copyright notice, | ||
| // this list of conditions and the following disclaimer in the documentation | ||
| // and/or other materials provided with the distribution. | ||
| // | ||
| // 3. Neither the name of the copyright holder nor the names of its | ||
| // contributors may be used to endorse or promote products derived from | ||
| // this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | ||
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | ||
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| #include "shell.h" | ||
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| #include <string.h> | ||
|
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| namespace andino { | ||
|
|
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| void Shell::init(Stream& stream) { stream_ = &stream; } | ||
|
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| void Shell::set_default_callback(CommandCallback callback) { default_callback_ = callback; } | ||
|
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| void Shell::register_command(const char* name, CommandCallback callback) { | ||
| if (commands_count_ >= kCommandsMax) { | ||
| return; | ||
| } | ||
|
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| Command command; | ||
| strcpy(command.name, name); | ||
| command.callback = callback; | ||
| commands_[commands_count_++] = command; | ||
| } | ||
|
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| // TODO(jballoffet): Modify parsing method to allow command name to be a string. | ||
| void Shell::process() { | ||
| while (stream_->available() > 0) { | ||
| // Read the next character | ||
| char chr = stream_->read(); | ||
|
|
||
| // Terminate a command with a CR | ||
| if (chr == 13) { | ||
| if (args_count_ == 1) { | ||
| arg1_[arg_index_] = 0; | ||
| } else if (args_count_ == 2) { | ||
| arg2_[arg_index_] = 0; | ||
| } | ||
| execute_callback(); | ||
| reset(); | ||
| } | ||
| // Use spaces to delimit parts of the command | ||
| else if (chr == ' ') { | ||
| // Step through the arguments | ||
| if (args_count_ == 0) { | ||
| args_count_ = 1; | ||
| } else if (args_count_ == 1) { | ||
| arg1_[arg_index_] = 0; | ||
| args_count_ = 2; | ||
| arg_index_ = 0; | ||
| } | ||
| continue; | ||
| } else { | ||
| if (args_count_ == 0) { | ||
| // The first arg is the single-letter command | ||
| command_ = chr; | ||
| } else if (args_count_ == 1) { | ||
| // Subsequent arguments can be more than one character | ||
| arg1_[arg_index_] = chr; | ||
| arg_index_++; | ||
| } else if (args_count_ == 2) { | ||
| arg2_[arg_index_] = chr; | ||
| arg_index_++; | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| void Shell::reset() { | ||
| command_ = 0; | ||
| memset(arg1_, 0, sizeof(arg1_)); | ||
| memset(arg2_, 0, sizeof(arg2_)); | ||
| args_count_ = 0; | ||
| arg_index_ = 0; | ||
| } | ||
|
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| // TODO(jballoffet): Modify parsing method to allow command name to be a string. | ||
| void Shell::execute_callback() { | ||
| for (size_t i = 0; i < commands_count_; i++) { | ||
| if (command_ == commands_[i].name[0]) { | ||
| commands_[i].callback(arg1_, arg2_); | ||
| return; | ||
| } | ||
| } | ||
|
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| // Unknown command received, executing default callback. | ||
| if (default_callback_ != nullptr) { | ||
| default_callback_(arg1_, arg2_); | ||
| } | ||
| } | ||
|
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| } // namespace andino |
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