diff options
Diffstat (limited to 'js/src/jit-test/etc/wasm/generate-spectests/wast2js/src/out.rs')
| -rw-r--r-- | js/src/jit-test/etc/wasm/generate-spectests/wast2js/src/out.rs | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/js/src/jit-test/etc/wasm/generate-spectests/wast2js/src/out.rs b/js/src/jit-test/etc/wasm/generate-spectests/wast2js/src/out.rs new file mode 100644 index 0000000000..1d47365f19 --- /dev/null +++ b/js/src/jit-test/etc/wasm/generate-spectests/wast2js/src/out.rs @@ -0,0 +1,180 @@ +/* Copyright 2022 Mozilla Foundation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/// This module has a bare-bones "syntax tree" that helps us output more readable JS code in our +/// tests. This is a lot cheaper and faster than running a full JS formatter on the generated code. +/// The tree only has node types for things that matter to formatting; most things in the output +/// use the Raw type, which is just a plain old string. + +pub const LINE_WIDTH: usize = 80; // the default line width to try to meet (will not be met perfectly) +pub const NOWRAP: usize = 1000; // use for line_remaining when you don't want to wrap text + +pub enum JSNode { + Assert { + name: String, + exec: Box<JSNode>, + expected: Box<JSNode>, + }, + Invoke { + instance: String, + name: String, + body: Box<JSNode>, + }, + Call { + name: String, + args: Vec<Box<JSNode>>, + }, + Array(Vec<Box<JSNode>>), + Raw(String), +} + +impl JSNode { + /// Converts a node to JavaScript code. line_remaining is the number of characters remaining on + /// the line, used for line-wrapping purposes; if zero, the default LINE_WIDTH will be used. + pub fn output(&self, line_remaining: usize) -> String { + let line_remaining = if line_remaining == 0 { + LINE_WIDTH + } else { + line_remaining + }; + match self { + Self::Assert { + name, + exec, + expected, + } => { + if self.len() > line_remaining { + format!( + "{}(\n{}\n)", + name, + indent(format!( + "() => {},\n{},", + exec.output(line_remaining - 8), + expected.output(line_remaining - 2), + )), + ) + } else { + format!( + "{}(() => {}, {})", + name, + exec.output(NOWRAP), + expected.output(NOWRAP), + ) + } + } + Self::Invoke { + instance, + name, + body, + } => { + let body_string = + body.output(line_remaining - "invoke".len() - instance.len() - name.len()); + format!("invoke({}, `{}`, {})", instance, name, body_string) + } + Self::Call { name, args } => { + if self.len() > line_remaining { + let arg_strings: Vec<String> = args + .iter() + .map(|arg| arg.output(line_remaining - 2)) + .collect(); + format!("{}(\n{},\n)", name, indent(arg_strings.join(",\n"))) + } else { + let arg_strings: Vec<String> = + args.iter().map(|arg| arg.output(NOWRAP)).collect(); + format!("{}({})", name, arg_strings.join(", ")) + } + } + Self::Array(values) => { + if self.len() > line_remaining { + let value_strings = output_nodes(&values, 70); + format!("[\n{},\n]", indent(value_strings.join(",\n"))) + } else { + let value_strings = output_nodes(&values, 80); + format!("[{}]", value_strings.join(", ")) + } + } + Self::Raw(val) => val.to_string(), + } + } + + /// A rough estimate of the string length of the node. Used as a heuristic to know when we + /// should wrap text. + fn len(&self) -> usize { + match self { + Self::Assert { + name, + exec, + expected, + } => name.len() + exec.len() + expected.len(), + Self::Invoke { + instance, + name, + body, + } => instance.len() + name.len() + body.len(), + Self::Call { name, args } => { + let mut args_len: usize = 0; + for node in args { + args_len += node.len() + ", ".len(); + } + name.len() + args_len + } + Self::Array(nodes) => { + let mut content_len: usize = 0; + for node in nodes { + content_len += node.len() + ", ".len(); + } + content_len + } + Self::Raw(s) => s.len(), + } + } +} + +pub fn output_nodes(nodes: &Vec<Box<JSNode>>, line_width_per_node: usize) -> Vec<String> { + nodes + .iter() + .map(|node| node.output(line_width_per_node)) + .collect() +} + +pub fn strings_to_raws(strs: Vec<String>) -> Vec<Box<JSNode>> { + let mut res: Vec<Box<JSNode>> = vec![]; + for s in strs { + res.push(Box::new(JSNode::Raw(s))); + } + res +} + +fn indent(s: String) -> String { + let mut result = String::new(); + let mut do_indent = true; + for (i, line) in s.lines().enumerate() { + if i > 0 { + result.push('\n'); + } + if line.chars().any(|c| !c.is_whitespace()) { + if do_indent { + result.push_str(" "); + } + result.push_str(line); + + // An odd number of backticks in the line means we are entering or exiting a raw string. + if line.matches("`").count() % 2 == 1 { + do_indent = !do_indent + } + } + } + result +} |