mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 16:52:43 +00:00
3f3f45580a
Each of these strings would previously rely on StringView's char const* constructor overload, which would call __builtin_strlen on the string. Since we now have operator ""sv, we can replace these with much simpler versions. This opens the door to being able to remove StringView(char const*). No functional changes.
481 lines
20 KiB
C++
481 lines
20 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Formatter.h"
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#include "Shell.h"
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#include <LibRegex/Regex.h>
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namespace Shell {
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RefPtr<AST::Node> Shell::immediate_length_impl(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments, bool across)
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{
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auto name = across ? "length_across" : "length";
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if (arguments.size() < 1 || arguments.size() > 2) {
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raise_error(ShellError::EvaluatedSyntaxError, String::formatted("Expected one or two arguments to `{}'", name), invoking_node.position());
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return nullptr;
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}
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enum {
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Infer,
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String,
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List,
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} mode { Infer };
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bool is_inferred = false;
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const AST::Node* expr_node;
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if (arguments.size() == 2) {
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// length string <expr>
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// length list <expr>
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auto& mode_arg = arguments.first();
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if (!mode_arg.is_bareword()) {
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raise_error(ShellError::EvaluatedSyntaxError, String::formatted("Expected a bareword (either 'string' or 'list') in the two-argument form of the `{}' immediate", name), mode_arg.position());
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return nullptr;
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}
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auto const& mode_name = static_cast<const AST::BarewordLiteral&>(mode_arg).text();
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if (mode_name == "list") {
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mode = List;
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} else if (mode_name == "string") {
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mode = String;
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} else if (mode_name == "infer") {
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mode = Infer;
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} else {
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raise_error(ShellError::EvaluatedSyntaxError, String::formatted("Expected either 'string' or 'list' (and not {}) in the two-argument form of the `{}' immediate", mode_name, name), mode_arg.position());
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return nullptr;
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}
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expr_node = &arguments[1];
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} else {
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expr_node = &arguments[0];
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}
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if (mode == Infer) {
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is_inferred = true;
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if (expr_node->is_list())
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mode = List;
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else if (expr_node->is_simple_variable()) // "Look inside" variables
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mode = const_cast<AST::Node*>(expr_node)->run(this)->resolve_without_cast(this)->is_list_without_resolution() ? List : String;
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else if (is<AST::ImmediateExpression>(expr_node))
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mode = List;
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else
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mode = String;
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}
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auto value_with_number = [&](auto number) -> NonnullRefPtr<AST::Node> {
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return AST::make_ref_counted<AST::BarewordLiteral>(invoking_node.position(), String::number(number));
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};
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auto do_across = [&](StringView mode_name, auto& values) {
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if (is_inferred)
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mode_name = "infer"sv;
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// Translate to a list of applications of `length <mode_name>`
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Vector<NonnullRefPtr<AST::Node>> resulting_nodes;
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resulting_nodes.ensure_capacity(values.size());
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for (auto& entry : values) {
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// ImmediateExpression(length <mode_name> <entry>)
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resulting_nodes.unchecked_append(AST::make_ref_counted<AST::ImmediateExpression>(
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expr_node->position(),
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AST::NameWithPosition { "length", invoking_node.function_position() },
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NonnullRefPtrVector<AST::Node> { Vector<NonnullRefPtr<AST::Node>> {
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static_cast<NonnullRefPtr<AST::Node>>(AST::make_ref_counted<AST::BarewordLiteral>(expr_node->position(), mode_name)),
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AST::make_ref_counted<AST::SyntheticNode>(expr_node->position(), NonnullRefPtr<AST::Value>(entry)),
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} },
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expr_node->position()));
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}
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(resulting_nodes));
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};
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switch (mode) {
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default:
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case Infer:
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VERIFY_NOT_REACHED();
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case List: {
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auto value = (const_cast<AST::Node*>(expr_node))->run(this);
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if (!value)
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return value_with_number(0);
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value = value->resolve_without_cast(this);
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if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
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if (across)
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return do_across("list"sv, list->values());
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return value_with_number(list->values().size());
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}
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auto list = value->resolve_as_list(this);
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if (!across)
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return value_with_number(list.size());
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dbgln("List has {} entries", list.size());
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auto values = AST::make_ref_counted<AST::ListValue>(move(list));
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return do_across("list"sv, values->values());
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}
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case String: {
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// 'across' will only accept lists, and '!across' will only accept non-lists here.
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if (expr_node->is_list()) {
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if (!across) {
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raise_no_list_allowed:;
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Formatter formatter { *expr_node };
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if (is_inferred) {
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raise_error(ShellError::EvaluatedSyntaxError,
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String::formatted("Could not infer expression type, please explicitly use `{0} string' or `{0} list'", name),
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invoking_node.position());
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return nullptr;
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}
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auto source = formatter.format();
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raise_error(ShellError::EvaluatedSyntaxError,
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source.is_empty()
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? "Invalid application of `length' to a list"
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: String::formatted("Invalid application of `length' to a list\nperhaps you meant `{1}length \"{0}\"{2}' or `{1}length_across {0}{2}'?", source, "\x1b[32m", "\x1b[0m"),
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expr_node->position());
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return nullptr;
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}
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}
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auto value = (const_cast<AST::Node*>(expr_node))->run(this);
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if (!value)
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return value_with_number(0);
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value = value->resolve_without_cast(*this);
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if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
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if (!across)
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goto raise_no_list_allowed;
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return do_across("string"sv, list->values());
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}
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if (across && !value->is_list()) {
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Formatter formatter { *expr_node };
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auto source = formatter.format();
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raise_error(ShellError::EvaluatedSyntaxError,
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String::formatted("Invalid application of `length_across' to a non-list\nperhaps you meant `{1}length {0}{2}'?", source, "\x1b[32m", "\x1b[0m"),
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expr_node->position());
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return nullptr;
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}
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// Evaluate the nodes and substitute with the lengths.
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auto list = value->resolve_as_list(this);
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if (!expr_node->is_list()) {
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if (list.size() == 1) {
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if (across)
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goto raise_no_list_allowed;
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// This is the normal case, the expression is a normal non-list expression.
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return value_with_number(list.first().length());
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}
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// This can be hit by asking for the length of a command list (e.g. `(>/dev/null)`)
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// raise an error about misuse of command lists for now.
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// FIXME: What's the length of `(>/dev/null)` supposed to be?
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raise_error(ShellError::EvaluatedSyntaxError, "Length of meta value (or command list) requested, this is currently not supported.", expr_node->position());
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return nullptr;
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}
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auto values = AST::make_ref_counted<AST::ListValue>(move(list));
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return do_across("string"sv, values->values());
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}
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}
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}
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RefPtr<AST::Node> Shell::immediate_length(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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return immediate_length_impl(invoking_node, arguments, false);
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}
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RefPtr<AST::Node> Shell::immediate_length_across(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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return immediate_length_impl(invoking_node, arguments, true);
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}
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RefPtr<AST::Node> Shell::immediate_regex_replace(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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if (arguments.size() != 3) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 3 arguments to regex_replace", invoking_node.position());
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return nullptr;
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}
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auto pattern = const_cast<AST::Node&>(arguments[0]).run(this);
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auto replacement = const_cast<AST::Node&>(arguments[1]).run(this);
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auto value = const_cast<AST::Node&>(arguments[2]).run(this)->resolve_without_cast(this);
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if (!pattern->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace pattern to be a string", arguments[0].position());
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return nullptr;
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}
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if (!replacement->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace replacement string to be a string", arguments[1].position());
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return nullptr;
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}
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if (!value->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the regex_replace target value to be a string", arguments[2].position());
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return nullptr;
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}
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Regex<PosixExtendedParser> re { pattern->resolve_as_list(this).first() };
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auto result = re.replace(value->resolve_as_list(this)[0], replacement->resolve_as_list(this)[0], PosixFlags::Global | PosixFlags::Multiline | PosixFlags::Unicode);
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return AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), move(result), AST::StringLiteral::EnclosureType::None);
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}
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RefPtr<AST::Node> Shell::immediate_remove_suffix(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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if (arguments.size() != 2) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to remove_suffix", invoking_node.position());
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return nullptr;
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}
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auto suffix = const_cast<AST::Node&>(arguments[0]).run(this);
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auto value = const_cast<AST::Node&>(arguments[1]).run(this)->resolve_without_cast(this);
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if (!suffix->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the remove_suffix suffix string to be a string", arguments[0].position());
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return nullptr;
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}
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auto suffix_str = suffix->resolve_as_list(this)[0];
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auto values = value->resolve_as_list(this);
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Vector<NonnullRefPtr<AST::Node>> nodes;
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for (auto& value_str : values) {
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StringView removed { value_str };
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if (value_str.ends_with(suffix_str))
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removed = removed.substring_view(0, value_str.length() - suffix_str.length());
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nodes.append(AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), removed, AST::StringLiteral::EnclosureType::None));
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}
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(nodes));
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}
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RefPtr<AST::Node> Shell::immediate_remove_prefix(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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if (arguments.size() != 2) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to remove_prefix", invoking_node.position());
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return nullptr;
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}
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auto prefix = const_cast<AST::Node&>(arguments[0]).run(this);
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auto value = const_cast<AST::Node&>(arguments[1]).run(this)->resolve_without_cast(this);
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if (!prefix->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the remove_prefix prefix string to be a string", arguments[0].position());
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return nullptr;
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}
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auto prefix_str = prefix->resolve_as_list(this)[0];
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auto values = value->resolve_as_list(this);
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Vector<NonnullRefPtr<AST::Node>> nodes;
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for (auto& value_str : values) {
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StringView removed { value_str };
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if (value_str.starts_with(prefix_str))
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removed = removed.substring_view(prefix_str.length());
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nodes.append(AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), removed, AST::StringLiteral::EnclosureType::None));
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}
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(nodes));
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}
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RefPtr<AST::Node> Shell::immediate_split(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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if (arguments.size() != 2) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to split", invoking_node.position());
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return nullptr;
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}
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auto delimiter = const_cast<AST::Node&>(arguments[0]).run(this);
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auto value = const_cast<AST::Node&>(arguments[1]).run(this)->resolve_without_cast(this);
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if (!delimiter->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the split delimiter string to be a string", arguments[0].position());
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return nullptr;
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}
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auto delimiter_str = delimiter->resolve_as_list(this)[0];
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auto transform = [&](auto const& values) {
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// Translate to a list of applications of `split <delimiter>`
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Vector<NonnullRefPtr<AST::Node>> resulting_nodes;
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resulting_nodes.ensure_capacity(values.size());
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for (auto& entry : values) {
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// ImmediateExpression(split <delimiter> <entry>)
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resulting_nodes.unchecked_append(AST::make_ref_counted<AST::ImmediateExpression>(
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arguments[1].position(),
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invoking_node.function(),
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NonnullRefPtrVector<AST::Node> { Vector<NonnullRefPtr<AST::Node>> {
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arguments[0],
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AST::make_ref_counted<AST::SyntheticNode>(arguments[1].position(), NonnullRefPtr<AST::Value>(entry)),
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} },
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arguments[1].position()));
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}
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(resulting_nodes));
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};
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if (auto list = dynamic_cast<AST::ListValue*>(value.ptr())) {
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return transform(list->values());
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}
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// Otherwise, just resolve to a list and transform that.
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auto list = value->resolve_as_list(this);
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if (!value->is_list()) {
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if (list.is_empty())
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), NonnullRefPtrVector<AST::Node> {});
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auto& value = list.first();
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Vector<String> split_strings;
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if (delimiter_str.is_empty()) {
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StringBuilder builder;
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for (auto code_point : Utf8View { value }) {
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builder.append_code_point(code_point);
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split_strings.append(builder.build());
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builder.clear();
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}
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} else {
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auto split = StringView { value }.split_view(delimiter_str, options.inline_exec_keep_empty_segments);
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split_strings.ensure_capacity(split.size());
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for (auto& entry : split)
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split_strings.append(entry);
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}
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return AST::make_ref_counted<AST::SyntheticNode>(invoking_node.position(), AST::make_ref_counted<AST::ListValue>(move(split_strings)));
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}
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return transform(AST::make_ref_counted<AST::ListValue>(list)->values());
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}
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RefPtr<AST::Node> Shell::immediate_concat_lists(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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NonnullRefPtrVector<AST::Node> result;
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for (auto& argument : arguments) {
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if (auto* list = dynamic_cast<const AST::ListConcatenate*>(&argument)) {
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result.extend(list->list());
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} else {
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auto list_of_values = const_cast<AST::Node&>(argument).run(this)->resolve_without_cast(this);
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if (auto* list = dynamic_cast<AST::ListValue*>(list_of_values.ptr())) {
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for (auto& entry : static_cast<Vector<NonnullRefPtr<AST::Value>>&>(list->values()))
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result.append(AST::make_ref_counted<AST::SyntheticNode>(argument.position(), entry));
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} else {
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auto values = list_of_values->resolve_as_list(this);
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for (auto& entry : values)
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result.append(AST::make_ref_counted<AST::StringLiteral>(argument.position(), entry, AST::StringLiteral::EnclosureType::None));
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}
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}
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}
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(result));
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}
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RefPtr<AST::Node> Shell::immediate_filter_glob(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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// filter_glob string list
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if (arguments.size() != 2) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly two arguments to filter_glob (<glob> <list>)", invoking_node.position());
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return nullptr;
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}
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auto glob_list = const_cast<AST::Node&>(arguments[0]).run(*this)->resolve_as_list(*this);
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if (glob_list.size() != 1) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the <glob> argument to filter_glob to be a single string", arguments[0].position());
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return nullptr;
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}
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auto& glob = glob_list.first();
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auto& list_node = arguments[1];
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NonnullRefPtrVector<AST::Node> result;
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const_cast<AST::Node&>(list_node).for_each_entry(*this, [&](NonnullRefPtr<AST::Value> entry) {
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auto value = entry->resolve_as_list(*this);
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if (value.size() == 0)
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return IterationDecision::Continue;
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if (value.size() == 1) {
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if (!value.first().matches(glob))
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return IterationDecision::Continue;
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result.append(AST::make_ref_counted<AST::StringLiteral>(arguments[1].position(), value.first(), AST::StringLiteral::EnclosureType::None));
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return IterationDecision::Continue;
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}
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for (auto& entry : value) {
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if (entry.matches(glob)) {
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NonnullRefPtrVector<AST::Node> nodes;
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for (auto& string : value)
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nodes.append(AST::make_ref_counted<AST::StringLiteral>(arguments[1].position(), string, AST::StringLiteral::EnclosureType::None));
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result.append(AST::make_ref_counted<AST::ListConcatenate>(arguments[1].position(), move(nodes)));
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return IterationDecision::Continue;
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}
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}
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return IterationDecision::Continue;
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});
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return AST::make_ref_counted<AST::ListConcatenate>(invoking_node.position(), move(result));
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}
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RefPtr<AST::Node> Shell::immediate_join(AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
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{
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if (arguments.size() != 2) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected exactly 2 arguments to join", invoking_node.position());
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return nullptr;
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}
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auto delimiter = const_cast<AST::Node&>(arguments[0]).run(this);
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if (!delimiter->is_string()) {
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raise_error(ShellError::EvaluatedSyntaxError, "Expected the join delimiter string to be a string", arguments[0].position());
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return nullptr;
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}
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auto value = const_cast<AST::Node&>(arguments[1]).run(this)->resolve_without_cast(this);
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|
if (!value->is_list()) {
|
|
raise_error(ShellError::EvaluatedSyntaxError, "Expected the joined list to be a list", arguments[1].position());
|
|
return nullptr;
|
|
}
|
|
|
|
auto delimiter_str = delimiter->resolve_as_list(this)[0];
|
|
StringBuilder builder;
|
|
builder.join(delimiter_str, value->resolve_as_list(*this));
|
|
|
|
return AST::make_ref_counted<AST::StringLiteral>(invoking_node.position(), builder.to_string(), AST::StringLiteral::EnclosureType::None);
|
|
}
|
|
|
|
RefPtr<AST::Node> Shell::run_immediate_function(StringView str, AST::ImmediateExpression& invoking_node, NonnullRefPtrVector<AST::Node> const& arguments)
|
|
{
|
|
#define __ENUMERATE_SHELL_IMMEDIATE_FUNCTION(name) \
|
|
if (str == #name) \
|
|
return immediate_##name(invoking_node, arguments);
|
|
|
|
ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS()
|
|
|
|
#undef __ENUMERATE_SHELL_IMMEDIATE_FUNCTION
|
|
raise_error(ShellError::EvaluatedSyntaxError, String::formatted("Unknown immediate function {}", str), invoking_node.position());
|
|
return nullptr;
|
|
}
|
|
|
|
bool Shell::has_immediate_function(StringView str)
|
|
{
|
|
#define __ENUMERATE_SHELL_IMMEDIATE_FUNCTION(name) \
|
|
if (str == #name) \
|
|
return true;
|
|
|
|
ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS()
|
|
|
|
#undef __ENUMERATE_SHELL_IMMEDIATE_FUNCTION
|
|
|
|
return false;
|
|
}
|
|
}
|