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Copy pathstring.ts
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844 lines (780 loc) · 30.3 KB
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/// <reference path="./rt/index.d.ts" />
import { OBJECT, BLOCK_MAXSIZE, TOTAL_OVERHEAD } from "./rt/common";
import { compareImpl, strtol, strtod, isSpace, isAscii, isFinalSigma, toLower8, toUpper8 } from "./util/string";
import { SPECIALS_UPPER, casemap, bsearch } from "./util/casemap";
import { E_INDEXOUTOFRANGE, E_INVALIDLENGTH, E_UNPAIRED_SURROGATE } from "./util/error";
import { idof } from "./builtins";
import { Array } from "./array";
@final export abstract class String {
@lazy static readonly MAX_LENGTH: i32 = <i32>(BLOCK_MAXSIZE >>> alignof<u16>());
static fromCharCode(unit: i32, surr: i32 = -1): String {
var hasSur = surr > 0;
var out = changetype<String>(__new(2 << i32(hasSur), idof<String>()));
store<u16>(changetype<usize>(out), <u16>unit);
if (hasSur) store<u16>(changetype<usize>(out), <u16>surr, 2);
return out;
}
static fromCharCodes(units: Array<i32>): String {
var length = units.length;
var out = changetype<String>(__new(<usize>length << 1, idof<String>()));
var ptr = units.dataStart;
for (let i = 0; i < length; ++i) {
store<u16>(changetype<usize>(out) + (<usize>i << 1), load<i32>(ptr + (<usize>i << 2)));
}
return out;
}
static fromCodePoint(code: i32): String {
var hasSur = <u32>code > 0xFFFF;
var out = changetype<String>(__new(2 << i32(hasSur), idof<String>()));
if (!hasSur) {
store<u16>(changetype<usize>(out), <u16>code);
} else {
// Checks valid code point range
assert(<u32>code <= 0x10FFFF);
code -= 0x10000;
let hi = (code & 0x03FF) | 0xDC00;
let lo = code >>> 10 | 0xD800;
store<u32>(changetype<usize>(out), lo | hi << 16);
}
return out;
}
@builtin static raw(parts: TemplateStringsArray, ...args: unknown[]): string { return unreachable(); }
get length(): i32 {
return changetype<OBJECT>(changetype<usize>(this) - TOTAL_OVERHEAD).rtSize >> 1;
}
at(pos: i32): String {
var len = this.length;
pos += select(0, len, pos >= 0);
if (<u32>pos >= <u32>len) throw new RangeError(E_INDEXOUTOFRANGE);
var out = __new(2, idof<String>());
store<u16>(out, load<u16>(changetype<usize>(this) + (<usize>pos << 1)));
return changetype<String>(out); // retains
}
@operator("[]") charAt(pos: i32): String {
if (<u32>pos >= <u32>this.length) return changetype<String>("");
var out = changetype<String>(__new(2, idof<String>()));
store<u16>(changetype<usize>(out), load<u16>(changetype<usize>(this) + (<usize>pos << 1)));
return out;
}
charCodeAt(pos: i32): i32 {
if (<u32>pos >= <u32>this.length) return -1; // (NaN)
return load<u16>(changetype<usize>(this) + (<usize>pos << 1));
}
codePointAt(pos: i32): i32 {
var len = this.length;
if (<u32>pos >= <u32>len) return -1; // (undefined)
var first = <i32>load<u16>(changetype<usize>(this) + (<usize>pos << 1));
if ((first & 0xFC00) != 0xD800 || pos + 1 == len) return first;
var second = <i32>load<u16>(changetype<usize>(this) + (<usize>pos << 1), 2);
if ((second & 0xFC00) != 0xDC00) return first;
return (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
}
@operator("+") private static __concat(left: String, right: String): String {
return left.concat(right);
}
concat(other: String): String {
var thisSize: isize = this.length << 1;
var otherSize: isize = other.length << 1;
var outSize: usize = thisSize + otherSize;
if (outSize == 0) return changetype<String>("");
var out = changetype<String>(__new(outSize, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this), thisSize);
memory.copy(changetype<usize>(out) + thisSize, changetype<usize>(other), otherSize);
return out;
}
endsWith(search: String, end: i32 = String.MAX_LENGTH): bool {
end = min(max(end, 0), this.length);
var searchLength = <isize>search.length;
var searchStart = <isize>end - searchLength;
if (searchStart < 0) return false;
// @ts-ignore: string <-> String
return !compareImpl(this, searchStart, search, 0, searchLength);
}
@operator("==") private static __eq(left: String | null, right: String | null): bool {
if (left === right) return true;
if (left === null || right === null) return false;
var leftLength = left.length;
if (leftLength != right.length) return false;
// @ts-ignore: string <-> String
return !compareImpl(left, 0, right, 0, leftLength);
}
@operator.prefix("!")
private static __not(str: String | null): bool {
return str === null || !str.length;
}
@operator("!=")
private static __ne(left: String | null, right: String | null): bool {
return !this.__eq(left, right);
}
@operator(">") private static __gt(left: String, right: String): bool {
if (left === right) return false;
var leftLength = left.length;
if (!leftLength) return false;
var rightLength = right.length;
if (!rightLength) return true;
// @ts-ignore: string <-> String
var res = compareImpl(left, 0, right, 0, min(leftLength, rightLength));
return res ? res > 0 : leftLength > rightLength;
}
@operator(">=") private static __gte(left: String, right: String): bool {
return !this.__lt(left, right);
}
@operator("<") private static __lt(left: String, right: String): bool {
if (left === right) return false;
var rightLength = right.length;
if (!rightLength) return false;
var leftLength = left.length;
if (!leftLength) return true;
// @ts-ignore: string <-> String
var res = compareImpl(left, 0, right, 0, min(leftLength, rightLength));
return res ? res < 0 : leftLength < rightLength;
}
@operator("<=") private static __lte(left: String, right: String): bool {
return !this.__gt(left, right);
}
includes(search: String, start: i32 = 0): bool {
return this.indexOf(search, start) != -1;
}
indexOf(search: String, start: i32 = 0): i32 {
var searchLen = <isize>search.length;
if (!searchLen) return 0;
var len = <isize>this.length;
if (!len) return -1;
var searchStart = min(max(<isize>start, 0), len);
for (len -= searchLen; searchStart <= len; ++searchStart) {
// @ts-ignore: string <-> String
if (!compareImpl(this, searchStart, search, 0, searchLen)) return <i32>searchStart;
}
return -1;
}
lastIndexOf(search: String, start: i32 = i32.MAX_VALUE): i32 {
var searchLen = <isize>search.length;
if (!searchLen) return this.length;
var len = this.length;
if (!len) return -1;
var searchStart = min(max(<isize>start, 0), <isize>len - searchLen);
for (; searchStart >= 0; --searchStart) {
// @ts-ignore: string <-> String
if (!compareImpl(this, searchStart, search, 0, searchLen)) return <i32>searchStart;
}
return -1;
}
// TODO: implement full locale comparison with locales and Collator options
localeCompare(other: String): i32 {
if (other === this) return 0; // compare pointers
var len: isize = this.length;
var otherLen: isize = other.length;
if (otherLen != len) return select(1, -1, len > otherLen);
if (!otherLen) return 0; // "" == ""
// @ts-ignore: string <-> String
return compareImpl(this, 0, other, 0, otherLen);
}
startsWith(search: String, start: i32 = 0): bool {
var len = <isize>this.length;
var searchStart = min(max(<isize>start, 0), len);
var searchLength = <isize>search.length;
if (searchLength + searchStart > len) return false;
// @ts-ignore: string <-> String
return !compareImpl(this, searchStart, search, 0, searchLength);
}
substr(start: i32, length: i32 = i32.MAX_VALUE): String { // legacy
var intStart: isize = start;
var end: isize = length;
var len: isize = this.length;
if (intStart < 0) intStart = max(len + intStart, 0);
var size = min(max(end, 0), len - intStart) << 1;
if (size <= 0) return changetype<String>("");
var out = changetype<String>(__new(size, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + (intStart << 1), size);
return out;
}
substring(start: i32, end: i32 = i32.MAX_VALUE): String {
var len: isize = this.length;
var finalStart = min<isize>(max(start, 0), len);
var finalEnd = min<isize>(max(end, 0), len);
var fromPos = min<isize>(finalStart, finalEnd) << 1;
var toPos = max<isize>(finalStart, finalEnd) << 1;
var size = toPos - fromPos;
if (!size) return changetype<String>("");
if (!fromPos && toPos == len << 1) return this;
var out = changetype<String>(__new(size, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + fromPos, size);
return out;
}
trim(): String {
var len = this.length;
var size: usize = len << 1;
while (size && isSpace(load<u16>(changetype<usize>(this) + size - 2))) {
size -= 2;
}
var offset: usize = 0;
while (offset < size && isSpace(load<u16>(changetype<usize>(this) + offset))) {
offset += 2; size -= 2;
}
if (!size) return changetype<String>("");
if (!offset && size == len << 1) return this;
var out = changetype<String>(__new(size, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + offset, size);
return out;
}
@inline
trimLeft(): String {
return this.trimStart();
}
@inline
trimRight(): String {
return this.trimEnd();
}
trimStart(): String {
var size = <usize>this.length << 1;
var offset: usize = 0;
while (offset < size && isSpace(load<u16>(changetype<usize>(this) + offset))) {
offset += 2;
}
if (!offset) return this;
size -= offset;
if (!size) return changetype<String>("");
var out = changetype<String>(__new(size, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + offset, size);
return out;
}
trimEnd(): String {
var originalSize = <usize>this.length << 1;
var size = originalSize;
while (size && isSpace(load<u16>(changetype<usize>(this) + size - 2))) {
size -= 2;
}
if (!size) return changetype<String>("");
if (size == originalSize) return this;
var out = changetype<String>(__new(size, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this), size);
return out;
}
padStart(length: i32, pad: string = " "): String {
var thisSize = <usize>this.length << 1;
var targetSize = <usize>length << 1;
var padSize = <usize>pad.length << 1;
if (targetSize < thisSize || !padSize) return this;
var prependSize = targetSize - thisSize;
var out = changetype<String>(__new(targetSize, idof<String>()));
if (prependSize > padSize) {
let repeatCount = (prependSize - 2) / padSize;
let restBase = repeatCount * padSize;
let restSize = prependSize - restBase;
memory.repeat(changetype<usize>(out), changetype<usize>(pad), padSize, repeatCount);
memory.copy(changetype<usize>(out) + restBase, changetype<usize>(pad), restSize);
} else {
memory.copy(changetype<usize>(out), changetype<usize>(pad), prependSize);
}
memory.copy(changetype<usize>(out) + prependSize, changetype<usize>(this), thisSize);
return out;
}
padEnd(length: i32, pad: string = " "): String {
var thisSize = <usize>this.length << 1;
var targetSize = <usize>length << 1;
var padSize = <usize>pad.length << 1;
if (targetSize < thisSize || !padSize) return this;
var appendSize = targetSize - thisSize;
var out = changetype<String>(__new(targetSize, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this), thisSize);
if (appendSize > padSize) {
let repeatCount = (appendSize - 2) / padSize;
let restBase = repeatCount * padSize;
let restSize = appendSize - restBase;
memory.repeat(changetype<usize>(out) + thisSize, changetype<usize>(pad), padSize, repeatCount);
memory.copy(changetype<usize>(out) + thisSize + restBase, changetype<usize>(pad), restSize);
} else {
memory.copy(changetype<usize>(out) + thisSize, changetype<usize>(pad), appendSize);
}
return out;
}
repeat(count: i32 = 0): String {
var length = this.length;
// Most browsers can't handle strings 1 << 28 chars or longer
if (count < 0 || <u64>length * count > (1 << 28)) {
throw new RangeError(E_INVALIDLENGTH);
}
if (count == 0 || !length) return changetype<String>("");
if (count == 1) return this;
var out = changetype<String>(__new((length * count) << 1, idof<String>()));
memory.repeat(changetype<usize>(out), changetype<usize>(this), <usize>length << 1, count);
return out;
}
replace(search: String, replacement: String): String {
var len: usize = this.length;
var slen: usize = search.length;
if (len <= slen) {
return len < slen ? this : select<String>(replacement, this, search == this);
}
var index: isize = this.indexOf(search);
if (~index) {
let rlen: usize = replacement.length;
len -= slen;
let olen = len + rlen;
if (olen) {
let out = changetype<String>(__new(olen << 1, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this), index << 1);
memory.copy(
changetype<usize>(out) + (index << 1),
changetype<usize>(replacement),
rlen << 1
);
memory.copy(
changetype<usize>(out) + ((index + rlen) << 1),
changetype<usize>(this) + ((index + slen) << 1),
(len - index) << 1
);
return out;
}
}
return this;
}
replaceAll(search: String, replacement: String): String {
var thisLen: usize = this.length;
var searchLen: usize = search.length;
if (thisLen <= searchLen) {
return thisLen < searchLen
? this
: select<String>(replacement, this, search == this);
}
var replaceLen: usize = replacement.length;
if (!searchLen) {
if (!replaceLen) return this;
// Special case: 'abc'.replaceAll('', '-') -> '-a-b-c-'
let out = changetype<String>(__new((thisLen + (thisLen + 1) * replaceLen) << 1, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(replacement), replaceLen << 1);
let offset = replaceLen;
for (let i: usize = 0; i < thisLen; ++i) {
store<u16>(
changetype<usize>(out) + (offset++ << 1),
load<u16>(changetype<usize>(this) + (i << 1))
);
memory.copy(
changetype<usize>(out) + (offset << 1),
changetype<usize>(replacement),
replaceLen << 1
);
offset += replaceLen;
}
return out;
}
var prev: isize = 0, next: isize = 0;
if (searchLen == replaceLen) {
// Fast path when search and replacement have same length
let outSize = thisLen << 1;
let out = changetype<String>(__new(outSize, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this), outSize);
while (~(next = <isize>this.indexOf(search, <i32>prev))) {
memory.copy(changetype<usize>(out) + (next << 1), changetype<usize>(replacement), replaceLen << 1);
prev = next + searchLen;
}
return out;
}
var out: String | null = null, offset: usize = 0, outSize = thisLen;
while (~(next = <isize>this.indexOf(search, <i32>prev))) {
if (!out) out = changetype<String>(__new(thisLen << 1, idof<String>()));
let chunk = next - prev;
if (offset + chunk + replaceLen > outSize) {
outSize <<= 1;
out = changetype<String>(__renew(changetype<usize>(out), outSize << 1));
}
memory.copy(
changetype<usize>(out) + (offset << 1),
changetype<usize>(this) + (prev << 1),
chunk << 1
);
offset += chunk;
memory.copy(
changetype<usize>(out) + (offset << 1),
changetype<usize>(replacement),
replaceLen << 1
);
offset += replaceLen;
prev = next + searchLen;
}
if (out) {
let rest = thisLen - prev;
if (offset + rest > outSize) {
outSize <<= 1;
out = changetype<String>(__renew(changetype<usize>(out), outSize << 1));
}
if (rest) {
memory.copy(
changetype<usize>(out) + (offset << 1),
changetype<usize>(this) + (prev << 1),
rest << 1
);
}
rest += offset;
if (outSize > rest) {
out = changetype<String>(__renew(changetype<usize>(out), rest << 1));
}
return out;
}
return this;
}
slice(start: i32, end: i32 = i32.MAX_VALUE): String {
var len = this.length;
start = start < 0 ? max(start + len, 0) : min(start, len);
end = end < 0 ? max(end + len, 0) : min(end, len);
len = end - start;
if (len <= 0) return changetype<String>("");
var out = changetype<String>(__new(len << 1, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + (<usize>start << 1), <usize>len << 1);
return out;
}
split(separator: String | null = null, limit: i32 = i32.MAX_VALUE): String[] {
if (!limit) return changetype<String[]>(__newArray(0, alignof<String>(), idof<Array<String>>()));
if (separator === null) return [this];
var length: isize = this.length;
var sepLen = separator.length;
if (limit < 0) limit = i32.MAX_VALUE;
if (!sepLen) {
if (!length) return changetype<String[]>(__newArray(0, alignof<String>(), idof<Array<String>>()));
// split by chars
length = min<isize>(length, <isize>limit);
let result = changetype<String[]>(__newArray(<i32>length, alignof<String>(), idof<Array<String>>()));
// @ts-ignore: cast
let resultStart = result.dataStart as usize;
for (let i: isize = 0; i < length; ++i) {
let charStr = changetype<String>(__new(2, idof<String>()));
store<u16>(changetype<usize>(charStr), load<u16>(changetype<usize>(this) + (<usize>i << 1)));
store<usize>(resultStart + (<usize>i << alignof<usize>()), changetype<usize>(charStr)); // result[i] = charStr
__link(changetype<usize>(result), changetype<usize>(charStr), true);
}
return result;
} else if (!length) {
let result = changetype<String[]>(__newArray(1, alignof<String>(), idof<Array<String>>()));
// @ts-ignore: cast
store<usize>(result.dataStart as usize, changetype<usize>("")); // static ""
return result;
}
var result = changetype<String[]>(__newArray(0, alignof<String>(), idof<Array<String>>()));
var end = 0, start = 0, i = 0;
while (~(end = this.indexOf(separator, start))) {
let len = end - start;
if (len > 0) {
let out = changetype<String>(__new(<usize>len << 1, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + (<usize>start << 1), <usize>len << 1);
result.push(out);
} else {
result.push(changetype<String>(""));
}
if (++i == limit) return result;
start = end + sepLen;
}
if (!start) { // also means: loop above didn't do anything
result.push(this);
return result;
}
var len = length - start;
if (len > 0) {
let out = changetype<String>(__new(<usize>len << 1, idof<String>()));
memory.copy(changetype<usize>(out), changetype<usize>(this) + (<usize>start << 1), <usize>len << 1);
result.push(out);
} else {
result.push(changetype<String>("")); // static ""
}
return result;
}
toLowerCase(): String {
var len = <usize>this.length;
if (!len) return this;
var codes = changetype<String>(__new(len * 2 * 2, idof<String>()));
var j: usize = 0;
for (let i: usize = 0; i < len; ++i, ++j) {
let c = <u32>load<u16>(changetype<usize>(this) + (i << 1));
if (isAscii(c)) {
store<u16>(changetype<usize>(codes) + (j << 1), toLower8(c));
} else {
// check and read surrogate pair
if ((c - 0xD7FF < 0xDC00 - 0xD7FF) && i < len - 1) {
let c1 = <u32>load<u16>(changetype<usize>(this) + (i << 1), 2);
if (c1 - 0xDBFF < 0xE000 - 0xDBFF) {
let c0 = c;
c = (((c & 0x03FF) << 10) | (c1 & 0x03FF)) + 0x10000;
++i;
if (c >= 0x20000) {
store<u32>(changetype<usize>(codes) + (j << 1), c0 | (c1 << 16));
++j;
continue;
}
}
}
// check special casing for lower table. It has one ently so instead lookup we just inline this.
if (c == 0x0130) {
// 0x0130 -> [0x0069, 0x0307]
store<u32>(changetype<usize>(codes) + (j << 1), (0x0307 << 16) | 0x0069);
++j;
} else if (c == 0x03A3) { // 'Σ'
// Σ maps to σ but except at the end of a word where it maps to ς
let sigma = 0x03C3; // σ
if (len > 1 && isFinalSigma(changetype<usize>(this), i, len)) {
sigma = 0x03C2; // ς
}
store<u16>(changetype<usize>(codes) + (j << 1), sigma);
} else if (c - 0x24B6 <= 0x24CF - 0x24B6) {
// Range 0x24B6 <= c <= 0x24CF not covered by casemap and require special early handling
store<u16>(changetype<usize>(codes) + (j << 1), c + 26);
} else {
let code = casemap(c, 0) & 0x1FFFFF;
if (code < 0x10000) {
store<u16>(changetype<usize>(codes) + (j << 1), code);
} else {
// store as surrogare pair
code -= 0x10000;
let lo = (code >>> 10) | 0xD800;
let hi = (code & 0x03FF) | 0xDC00;
store<u32>(changetype<usize>(codes) + (j << 1), lo | (hi << 16));
++j;
}
}
}
}
return changetype<String>(__renew(changetype<usize>(codes), j << 1));
}
toUpperCase(): String {
var len = <usize>this.length;
if (!len) return this;
var codes = changetype<String>(__new(len * 3 * 2, idof<String>()));
var specialsPtr = changetype<usize>(SPECIALS_UPPER);
var specialsLen = SPECIALS_UPPER.length;
var j: usize = 0;
for (let i: usize = 0; i < len; ++i, ++j) {
let c = <u32>load<u16>(changetype<usize>(this) + (i << 1));
if (isAscii(c)) {
store<u16>(changetype<usize>(codes) + (j << 1), toUpper8(c));
} else {
// check and read surrogate pair
if ((c - 0xD7FF < 0xDC00 - 0xD7FF) && i < len - 1) {
let c1 = <u32>load<u16>(changetype<usize>(this) + (i << 1), 2);
if (c1 - 0xDBFF < 0xE000 - 0xDBFF) {
let c0 = c;
c = (((c & 0x03FF) << 10) | (c1 & 0x03FF)) + 0x10000;
++i;
if (c >= 0x20000) {
store<u32>(changetype<usize>(codes) + (j << 1), c0 | (c1 << 16));
++j;
continue;
}
}
}
// Range 0x24D0 <= c <= 0x24E9 not covered by casemap and require special early handling
if (c - 0x24D0 <= 0x24E9 - 0x24D0) {
// monkey patch
store<u16>(changetype<usize>(codes) + (j << 1), c - 26);
} else {
let index: usize = -1;
// Fast range check. See first and last rows in specialsUpper table
if (c - 0x00DF <= 0xFB17 - 0x00DF) {
index = <usize>bsearch(c, specialsPtr, specialsLen);
}
if (~index) {
// load next 3 code points from row with `index` offset for specialsUpper table
let ab = load<u32>(specialsPtr + (index << 1), 2);
let cc = load<u16>(specialsPtr + (index << 1), 6);
store<u32>(changetype<usize>(codes) + (j << 1), ab, 0);
store<u16>(changetype<usize>(codes) + (j << 1), cc, 4);
j += 1 + usize(cc != 0);
} else {
let code = casemap(c, 1) & 0x1FFFFF;
if (code < 0x10000) {
store<u16>(changetype<usize>(codes) + (j << 1), code);
} else {
// store as surrogare pair
code -= 0x10000;
let lo = (code >>> 10) | 0xD800;
let hi = (code & 0x03FF) | 0xDC00;
store<u32>(changetype<usize>(codes) + (j << 1), lo | (hi << 16));
++j;
}
}
}
}
}
return changetype<String>(__renew(changetype<usize>(codes), j << 1));
}
toString(): String {
return this;
}
}
// @ts-ignore: nolib
export type string = String;
export function parseInt(str: string, radix: i32 = 0): f64 {
return strtol<f64>(str, radix);
}
export function parseFloat(str: string): f64 {
return strtod(str);
}
// Encoding helpers
export namespace String {
export namespace UTF8 {
export const enum ErrorMode {
WTF8,
REPLACE,
ERROR
}
export function byteLength(str: string, nullTerminated: bool = false): i32 {
var strOff = changetype<usize>(str);
var strEnd = strOff + <usize>changetype<OBJECT>(changetype<usize>(str) - TOTAL_OVERHEAD).rtSize;
var bufLen = i32(nullTerminated);
while (strOff < strEnd) {
let c1 = <u32>load<u16>(strOff);
if (c1 < 128) {
// @ts-ignore: cast
if (nullTerminated & !c1) break;
bufLen += 1;
} else if (c1 < 2048) {
bufLen += 2;
} else {
if ((c1 & 0xFC00) == 0xD800 && strOff + 2 < strEnd) {
if ((<u32>load<u16>(strOff, 2) & 0xFC00) == 0xDC00) {
bufLen += 4; strOff += 4;
continue;
}
}
bufLen += 3;
}
strOff += 2;
}
return bufLen;
}
export function encode(str: string, nullTerminated: bool = false, errorMode: ErrorMode = ErrorMode.WTF8): ArrayBuffer {
var buf = changetype<ArrayBuffer>(__new(<usize>byteLength(str, nullTerminated), idof<ArrayBuffer>()));
encodeUnsafe(changetype<usize>(str), str.length, changetype<usize>(buf), nullTerminated, errorMode);
return buf;
}
// @ts-ignore: decorator
@unsafe
export function encodeUnsafe(str: usize, len: i32, buf: usize, nullTerminated: bool = false, errorMode: ErrorMode = ErrorMode.WTF8): usize {
var strEnd = str + (<usize>len << 1);
var bufOff = buf;
while (str < strEnd) {
let c1 = <u32>load<u16>(str);
if (c1 < 128) {
store<u8>(bufOff, c1);
bufOff++;
} else if (c1 < 2048) {
let b0 = c1 >> 6 | 192;
let b1 = c1 & 63 | 128;
store<u16>(bufOff, b1 << 8 | b0);
bufOff += 2;
} else {
// D800: 11011 0 0000000000 Lead
// DBFF: 11011 0 1111111111
// DC00: 11011 1 0000000000 Trail
// DFFF: 11011 1 1111111111
// F800: 11111 0 0000000000 Mask
// FC00: 11111 1 0000000000
if ((c1 & 0xF800) == 0xD800) {
if (c1 < 0xDC00 && str + 2 < strEnd) {
let c2 = <u32>load<u16>(str, 2);
if ((c2 & 0xFC00) == 0xDC00) {
c1 = 0x10000 + ((c1 & 0x03FF) << 10) | (c2 & 0x03FF);
let b0 = c1 >> 18 | 240;
let b1 = c1 >> 12 & 63 | 128;
let b2 = c1 >> 6 & 63 | 128;
let b3 = c1 & 63 | 128;
store<u32>(bufOff, b3 << 24 | b2 << 16 | b1 << 8 | b0);
bufOff += 4; str += 4;
continue;
}
}
if (errorMode != ErrorMode.WTF8) { // unlikely
if (errorMode == ErrorMode.ERROR) throw new Error(E_UNPAIRED_SURROGATE);
c1 = 0xFFFD;
}
}
let b0 = c1 >> 12 | 224;
let b1 = c1 >> 6 & 63 | 128;
let b2 = c1 & 63 | 128;
store<u16>(bufOff, b1 << 8 | b0);
store<u8>(bufOff, b2, 2);
bufOff += 3;
}
str += 2;
}
if (nullTerminated) {
store<u8>(bufOff++, 0);
}
return bufOff - buf;
}
export function decode(buf: ArrayBuffer, nullTerminated: bool = false): String {
return decodeUnsafe(changetype<usize>(buf), buf.byteLength, nullTerminated);
}
// @ts-ignore: decorator
@unsafe
export function decodeUnsafe(buf: usize, len: usize, nullTerminated: bool = false): String {
var bufOff = buf;
var bufEnd = buf + len;
assert(bufEnd >= bufOff); // guard wraparound
var str = changetype<String>(__new(len << 1, idof<String>())); // max is one u16 char per u8 byte
var strOff = changetype<usize>(str);
while (bufOff < bufEnd) {
let u0 = <u32>load<u8>(bufOff); ++bufOff;
if (!(u0 & 128)) {
// @ts-ignore: cast
if (nullTerminated & !u0) break;
store<u16>(strOff, u0);
} else {
if (bufEnd == bufOff) break;
let u1 = <u32>load<u8>(bufOff) & 63; ++bufOff;
if ((u0 & 224) == 192) {
store<u16>(strOff, (u0 & 31) << 6 | u1);
} else {
if (bufEnd == bufOff) break;
let u2 = <u32>load<u8>(bufOff) & 63; ++bufOff;
if ((u0 & 240) == 224) {
u0 = (u0 & 15) << 12 | u1 << 6 | u2;
} else {
if (bufEnd == bufOff) break;
u0 = (u0 & 7) << 18 | u1 << 12 | u2 << 6 | <u32>load<u8>(bufOff) & 63;
++bufOff;
}
if (u0 < 0x10000) {
store<u16>(strOff, u0);
} else {
u0 -= 0x10000;
let lo = u0 >> 10 | 0xD800;
let hi = (u0 & 0x03FF) | 0xDC00;
store<u32>(strOff, lo | (hi << 16));
strOff += 2;
}
}
}
strOff += 2;
}
return changetype<String>(__renew(changetype<usize>(str), strOff - changetype<usize>(str)));
}
}
export namespace UTF16 {
export function byteLength(str: string): i32 {
return changetype<OBJECT>(changetype<usize>(str) - TOTAL_OVERHEAD).rtSize;
}
export function encode(str: string): ArrayBuffer {
var buf = changetype<ArrayBuffer>(__new(<usize>byteLength(str), idof<ArrayBuffer>()));
encodeUnsafe(changetype<usize>(str), str.length, changetype<usize>(buf));
return buf;
}
// @ts-ignore: decorator
@unsafe
export function encodeUnsafe(str: usize, len: i32, buf: usize): usize {
var size = <usize>len << 1;
memory.copy(buf, changetype<usize>(str), size);
return size;
}
export function decode(buf: ArrayBuffer): String {
return decodeUnsafe(changetype<usize>(buf), buf.byteLength);
}
// @ts-ignore: decorator
@unsafe
export function decodeUnsafe(buf: usize, len: usize): String {
var str = changetype<String>(__new(len &= ~1, idof<String>()));
memory.copy(changetype<usize>(str), buf, len);
return str;
}
}
}
export class TemplateStringsArray extends Array<string> {
readonly raw: string[];
}