mirror of
https://github.com/oven-sh/bun
synced 2026-02-10 02:48:50 +00:00
388 lines
11 KiB
Zig
388 lines
11 KiB
Zig
const std = @import("std");
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const expect = std.testing.expect;
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const JavascriptString = @import("ast/base.zig").JavascriptString;
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usingnamespace @import("string_types.zig");
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pub fn containsChar(self: string, char: u8) bool {
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return indexOfChar(self, char) != null;
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}
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pub fn contains(self: string, str: string) bool {
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return std.mem.indexOf(u8, self, str) != null;
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}
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pub fn indexOfChar(self: string, char: u8) ?usize {
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return std.mem.indexOfScalar(@TypeOf(char), self, char);
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}
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pub fn lastIndexOfChar(self: string, char: u8) ?usize {
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return std.mem.lastIndexOfScalar(u8, self, char);
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}
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pub fn lastIndexOf(self: string, str: u8) ?usize {
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return std.mem.lastIndexOf(u8, self, str);
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}
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pub fn indexOf(self: string, str: u8) ?usize {
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return std.mem.indexOf(u8, self, str);
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}
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pub fn startsWith(self: string, str: string) bool {
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if (str.len > self.len) {
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return false;
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}
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var i: usize = 0;
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while (i < str.len) {
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if (str[i] != self[i]) {
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return false;
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}
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i += 1;
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}
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return true;
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}
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pub fn endsWith(self: string, str: string) bool {
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if (str.len > self.len) {
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return false;
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}
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var i: usize = str.len - 1;
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while (i > 0) : (i -= 1) {
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if (str[i] != self[i]) {
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return false;
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}
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}
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return true;
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}
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pub fn endsWithAny(self: string, str: string) bool {
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const end = self[self.len - 1];
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for (str) |char| {
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if (char == end) {
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return true;
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}
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}
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return false;
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}
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pub fn lastNonwhitespace(self: string, str: string) bool {}
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pub fn endsWithAnyComptime(self: string, comptime str: string) bool {
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if (str.len < 10) {
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const last = self[self.len - 1];
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inline while (str) |char| {
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if (char == last) {
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return true;
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}
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}
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return false;
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} else {
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return endsWithAny(self, str);
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}
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}
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pub fn eql(self: string, other: anytype) bool {
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if (self.len != other.len) return false;
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for (self) |c, i| {
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if (other[i] != c) return false;
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}
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return true;
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}
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// I have not actually verified that this makes it faster
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// It's probably like 0.0001ms faster
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pub fn eqlComptime(self: string, comptime alt: string) bool {
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comptime var matcher_size: usize = 0;
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switch (comptime alt.len) {
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0 => {
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@compileError("Invalid size passed to eqlComptime");
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},
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1...4 => {
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matcher_size = 4;
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},
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5...8 => {
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matcher_size = 8;
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},
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8...12 => {
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comptime const FirstMatcher = ExactSizeMatcher(8);
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comptime const SecondMatcher = ExactSizeMatcher(4);
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comptime const first = FirstMatcher.case(alt[0..8]);
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comptime const second = SecondMatcher.case(alt[8..alt.len]);
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return (self.len == alt.len) and first == FirstMatcher.hashUnsafe(self[0..8]) and second == SecondMatcher.match(self[8..self.len]);
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},
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else => {
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@compileError(alt ++ " is too long.");
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},
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}
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comptime const Matcher = ExactSizeMatcher(matcher_size);
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comptime const alt_hash = Matcher.case(alt);
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return Matcher.match(self) == alt_hash;
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}
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pub fn append(allocator: *std.mem.Allocator, self: string, other: string) !string {
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return std.fmt.allocPrint(allocator, "{s}{s}", .{ self, other });
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}
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pub fn index(self: string, str: string) i32 {
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if (std.mem.indexOf(u8, self, str)) |i| {
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return @intCast(i32, i);
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} else {
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return -1;
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}
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}
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pub fn eqlUtf16(comptime self: string, other: JavascriptString) bool {
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return std.mem.eql(u16, std.unicode.utf8ToUtf16LeStringLiteral(self), other);
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}
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// Check utf16 string equals utf8 string without allocating extra memory
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pub fn utf16EqlString(text: []u16, str: string) bool {
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if (text.len > str.len) {
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// Strings can't be equal if UTF-16 encoding is longer than UTF-8 encoding
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return false;
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}
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var temp = [4]u8{ 0, 0, 0, 0 };
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const n = text.len;
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var j: usize = 0;
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var i: usize = 0;
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// TODO: is it safe to just make this u32 or u21?
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var r1: i32 = undefined;
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var k: u4 = 0;
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while (i < n) : (i += 1) {
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r1 = text[i];
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if (r1 >= 0xD800 and r1 <= 0xDBFF and i + 1 < n) {
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const r2: i32 = text[i + 1];
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if (r2 >= 0xDC00 and r2 <= 0xDFFF) {
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r1 = (r1 - 0xD800) << 10 | (r2 - 0xDC00) + 0x10000;
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i += 1;
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}
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}
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const width = encodeWTF8Rune(&temp, r1);
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if (j + width > str.len) {
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return false;
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}
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k = 0;
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while (k < width) : (k += 1) {
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if (temp[k] != str[j]) {
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return false;
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}
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j += 1;
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}
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}
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return j == str.len;
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}
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// This is a clone of golang's "utf8.EncodeRune" that has been modified to encode using
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// WTF-8 instead. See https://simonsapin.github.io/wtf-8/ for more info.
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pub fn encodeWTF8Rune(p: []u8, r: i32) u3 {
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// Negative values are erroneous. Making it unsigned addresses the problem.
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const i = @intCast(u32, r);
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switch (i) {
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0...0x7F => {
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p[0] = @intCast(u8, r);
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return 1;
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},
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(0x7F + 1)...0x7FF => {
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p[0] = 0xC0 | @intCast(u8, r >> 6);
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p[1] = 0x80 | @intCast(u8, r) & 0x3F;
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return 2;
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},
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(0x7FF + 1)...0xFFFF => {
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p[0] = 0xE0 | @intCast(u8, r >> 12);
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p[1] = 0x80 | @intCast(u8, r >> 6) & 0x3F;
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p[2] = 0x80 | @intCast(u8, r) & 0x3F;
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return 3;
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},
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else => {
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p[0] = 0xF0 | @intCast(u8, r >> 18);
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p[1] = 0x80 | @intCast(u8, r >> 12) & 0x3F;
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p[2] = 0x80 | @intCast(u8, r >> 6) & 0x3F;
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p[3] = 0x80 | @intCast(u8, r) & 0x3F;
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return 4;
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},
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}
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}
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pub fn toUTF16Buf(in: string, out: []u16) usize {
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var utf8Iterator = std.unicode.Utf8Iterator{ .bytes = in, .i = 0 };
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var c: u21 = 0;
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var i: usize = 0;
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while (utf8Iterator.nextCodepoint()) |code_point| {
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switch (code_point) {
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0...0xFFFF => {
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out[i] = @intCast(u16, code_point);
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i += 1;
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},
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else => {
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c = code_point - 0x10000;
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out[i] = @intCast(u16, 0xD800 + ((c >> 10) & 0x3FF));
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i += 1;
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out[i] = @intCast(u16, 0xDC00 + (c & 0x3FF));
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i += 1;
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},
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}
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}
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return i;
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}
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pub fn toUTF16Alloc(in: string, allocator: *std.mem.Allocator) !JavascriptString {
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var utf8Iterator = std.unicode.Utf8Iterator{ .bytes = in, .i = 0 };
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var out = try std.ArrayList(u16).initCapacity(allocator, in.len);
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var c: u21 = 0;
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var i: usize = 0;
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while (utf8Iterator.nextCodepoint()) |code_point| {
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switch (code_point) {
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0...0xFFFF => {
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try out.append(@intCast(u16, code_point));
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},
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else => {
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c = code_point - 0x10000;
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try out.append(@intCast(u16, 0xD800 + ((c >> 10) & 0x3FF)));
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try out.append(@intCast(u16, 0xDC00 + (c & 0x3FF)));
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},
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}
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}
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return out.toOwnedSlice();
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}
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pub fn containsNonBmpCodePoint(text: string) bool {
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var iter = std.unicode.Utf8Iterator{ .bytes = text, .i = 0 };
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while (iter.nextCodepoint()) |codepoint| {
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if (codepoint > 0xFFFF) {
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return true;
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}
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}
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return false;
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}
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pub fn containsNonBmpCodePointUTF16(_text: JavascriptString) bool {
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const n = _text.len;
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if (n > 0) {
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var i: usize = 0;
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var c: u16 = 0;
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var c2: u16 = 0;
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var text = _text[0 .. n - 1];
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while (i < n - 1) : (i += 1) {
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c = text[i];
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if (c >= 0xD800 and c <= 0xDBFF) {
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c2 = text[i + 1];
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if (c2 >= 0xDC00 and c2 <= 0xDFFF) {
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return true;
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}
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}
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}
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}
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return false;
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}
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pub fn join(slices: []const string, delimiter: string, allocator: *std.mem.Allocator) !string {
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return try std.mem.join(allocator, delimiter, slices);
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}
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pub fn cmpStringsAsc(ctx: void, a: string, b: string) bool {
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return std.mem.order(u8, a, b) == .lt;
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}
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pub fn cmpStringsDesc(ctx: void, a: string, b: string) bool {
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return std.mem.order(u8, a, b) == .gt;
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}
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const sort_asc = std.sort.asc(u8);
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const sort_desc = std.sort.desc(u8);
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pub fn sortAsc(in: []string) void {
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std.sort.sort([]const u8, in, {}, cmpStringsAsc);
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}
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pub fn sortDesc(in: []string) void {
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std.sort.sort([]const u8, in, {}, cmpStringsDesc);
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}
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test "join" {
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var string_list = &[_]string{ "abc", "def", "123", "hello" };
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const list = try join(string_list, "-", std.heap.page_allocator);
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std.testing.expectEqualStrings("abc-def-123-hello", list);
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}
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test "sortAsc" {
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var string_list = [_]string{ "abc", "def", "123", "hello" };
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var sorted_string_list = [_]string{ "123", "abc", "def", "hello" };
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var sorted_join = try join(&sorted_string_list, "-", std.heap.page_allocator);
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sortAsc(&string_list);
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var string_join = try join(&string_list, "-", std.heap.page_allocator);
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std.testing.expectEqualStrings(sorted_join, string_join);
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}
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test "sortDesc" {
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var string_list = [_]string{ "abc", "def", "123", "hello" };
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var sorted_string_list = [_]string{ "hello", "def", "abc", "123" };
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var sorted_join = try join(&sorted_string_list, "-", std.heap.page_allocator);
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sortDesc(&string_list);
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var string_join = try join(&string_list, "-", std.heap.page_allocator);
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std.testing.expectEqualStrings(sorted_join, string_join);
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}
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pub fn ExactSizeMatcher(comptime max_bytes: usize) type {
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const T = std.meta.Int(
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.unsigned,
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max_bytes * 8,
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);
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return struct {
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pub fn match(str: anytype) T {
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return hash(str) orelse std.math.maxInt(T);
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}
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pub fn case(comptime str: []const u8) T {
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return hash(str) orelse std.math.maxInt(T);
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}
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fn hash(str: anytype) ?T {
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if (str.len > max_bytes) return null;
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var tmp = [_]u8{0} ** max_bytes;
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std.mem.copy(u8, &tmp, str[0..str.len]);
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return std.mem.readIntNative(T, &tmp);
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}
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fn hashUnsafe(str: anytype) T {
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var tmp = [_]u8{0} ** max_bytes;
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std.mem.copy(u8, &tmp, str[0..str.len]);
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return std.mem.readIntNative(T, &tmp);
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}
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};
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}
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const eight = ExactSizeMatcher(8);
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test "ExactSizeMatcher 5 letter" {
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const word = "yield";
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expect(eight.match(word) == eight.case("yield"));
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expect(eight.match(word) != eight.case("yields"));
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}
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test "ExactSizeMatcher 4 letter" {
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const Four = ExactSizeMatcher(4);
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const word = "from";
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expect(Four.match(word) == Four.case("from"));
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expect(Four.match(word) != Four.case("fro"));
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}
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