json-as
Version:
The only JSON library you'll need for AssemblyScript. SIMD enabled
172 lines (166 loc) • 7.46 kB
text/typescript
import { JSON } from "../..";
import { BACK_SLASH, COMMA, CHAR_F, BRACE_LEFT, BRACKET_LEFT, CHAR_N, QUOTE, BRACE_RIGHT, BRACKET_RIGHT, CHAR_T, COLON } from "../../custom/chars";
import { isSpace } from "../../util";
import { ptrToStr } from "../../util/ptrToStr";
export function deserializeMap<T extends Map<any, any>>(srcStart: usize, srcEnd: usize, dst: usize): T {
const out = changetype<nonnull<T>>(dst || changetype<usize>(instantiate<T>()));
// @ts-ignore: type
if (!isString<indexof<T>>() && !isInteger<indexof<T>>() && !isFloat<indexof<T>>()) throw new Error("Map key must also be a valid JSON key!");
let keyStart: usize = 0;
let keyEnd: usize = 0;
let isKey = false;
let depth = 0;
let lastIndex: usize = 0;
while (srcStart < srcEnd && isSpace(load<u16>(srcStart))) srcStart += 2;
while (srcEnd > srcStart && isSpace(load<u16>(srcEnd - 2))) srcEnd -= 2; // would like to optimize this later
if (srcStart - srcEnd == 0) throw new Error("Input string had zero length or was all whitespace");
if (load<u16>(srcStart) != BRACE_LEFT) throw new Error("Expected '{' at start of object at position " + (srcEnd - srcStart).toString());
if (load<u16>(srcEnd - 2) != BRACE_RIGHT) throw new Error("Expected '}' at end of object at position " + (srcEnd - srcStart).toString());
srcStart += 2;
while (srcStart < srcEnd) {
let code = load<u16>(srcStart); // while (isSpace(code)) code = load<u16>(srcStart += 2);
if (keyStart == 0) {
if (code == QUOTE && load<u16>(srcStart - 2) !== BACK_SLASH) {
if (isKey) {
keyStart = lastIndex;
keyEnd = srcStart;
// console.log("Key: " + ptrToStr(lastIndex, srcStart));
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart + 2)));
while (isSpace((code = load<u16>((srcStart += 2))))) {}
if (code !== COLON) throw new Error("Expected ':' after key at position " + (srcEnd - srcStart).toString());
isKey = false;
} else {
// console.log("Got key start");
isKey = true; // i don't like this
lastIndex = srcStart + 2;
}
}
// isKey = !isKey;
srcStart += 2;
} else {
if (code == QUOTE) {
lastIndex = srcStart;
srcStart += 2;
while (srcStart < srcEnd) {
const code = load<u16>(srcStart);
if (code == QUOTE && load<u16>(srcStart - 2) !== BACK_SLASH) {
// console.log("Value (string): " + ptrToStr(lastIndex, srcStart + 2));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(lastIndex, srcStart + 2));
// while (isSpace(load<u16>(srcStart))) srcStart += 2;
srcStart += 4;
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
break;
}
srcStart += 2;
}
} else if (code - 48 <= 9 || code == 45) {
lastIndex = srcStart;
srcStart += 2;
while (srcStart < srcEnd) {
const code = load<u16>(srcStart);
if (code == COMMA || code == BRACE_RIGHT || isSpace(code)) {
// console.log("Value (number): " + ptrToStr(lastIndex, srcStart));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(lastIndex, srcStart));
// while (isSpace(load<u16>((srcStart += 2)))) {
// /* empty */
// }
srcStart += 2;
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
break;
}
srcStart += 2;
}
} else if (code == BRACE_LEFT) {
lastIndex = srcStart;
depth++;
srcStart += 2;
while (srcStart < srcEnd) {
const code = load<u16>(srcStart);
if (code == QUOTE) {
srcStart += 2;
while (!(load<u16>(srcStart) == QUOTE && load<u16>(srcStart - 2) != BACK_SLASH)) srcStart += 2;
} else if (code == BRACE_RIGHT) {
if (--depth == 0) {
// console.log("Value (object): " + ptrToStr(lastIndex, srcStart + 2));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(lastIndex, (srcStart += 2)));
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
// while (isSpace(load<u16>(srcStart))) {
// /* empty */
// }
break;
}
} else if (code == BRACE_LEFT) depth++;
srcStart += 2;
}
} else if (code == BRACKET_LEFT) {
lastIndex = srcStart;
depth++;
srcStart += 2;
while (srcStart < srcEnd) {
const code = load<u16>(srcStart);
if (code == BRACKET_RIGHT) {
if (--depth == 0) {
// console.log("Value (array): " + ptrToStr(lastIndex, srcStart + 2));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(lastIndex, (srcStart += 2)));
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
// while (isSpace(load<u16>((srcStart += 2)))) {
// /* empty */
// }
break;
}
} else if (code == BRACKET_LEFT) depth++;
srcStart += 2;
}
} else if (code == CHAR_T) {
if (load<u64>(srcStart) == 28429475166421108) {
// console.log("Value (bool): " + ptrToStr(srcStart, srcStart + 8));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(srcStart, (srcStart += 8)));
// while (isSpace(load<u16>((srcStart += 2)))) {
// /* empty */
// }
srcStart += 2;
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)) + " " + (srcStart < srcEnd).toString());
keyStart = 0;
}
} else if (code == CHAR_F) {
if (load<u64>(srcStart, 2) == 28429466576093281) {
// console.log("Value (bool): " + ptrToStr(srcStart, srcStart + 10));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(srcStart, (srcStart += 10)));
// while (isSpace(load<u16>((srcStart += 2)))) {
// /* empty */
// }
srcStart += 2;
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
}
} else if (code == CHAR_N) {
if (load<u64>(srcStart) == 30399761348886638) {
// console.log("Value (null): " + ptrToStr(srcStart, srcStart + 8));
// @ts-ignore: type
out.set(ptrToStr(keyStart, keyEnd), JSON.__deserialize<valueof<T>>(srcStart, (srcStart += 8)));
// while (isSpace(load<u16>((srcStart += 2)))) {
/* empty */
// }
srcStart += 2;
// console.log("Next: " + String.fromCharCode(load<u16>(srcStart)));
keyStart = 0;
}
} else if (isSpace(code)) {
srcStart += 2;
} else {
throw new Error("Unexpected character in JSON object '" + String.fromCharCode(code) + "' at position " + (srcEnd - srcStart).toString());
}
}
}
return out;
}