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dcode
2019-03-10 21:38:15 +01:00
parent 5a2ab3d7ec
commit cb77760562
19 changed files with 824 additions and 819 deletions
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42
src/compiler.ts
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@ -6364,51 +6364,29 @@ export class Compiler extends DiagnosticEmitter {
/** Ensures that the specified string exists in static memory and returns a pointer to it. */
ensureStaticString(stringValue: string): ExpressionRef {
var program = this.program;
var hasGC = program.hasGC;
var gcHeaderSize = program.gcHeaderSize;
var rtHeaderSize = program.runtimeHeaderSize;
var stringInstance = assert(program.stringInstance);
var stringSegment: MemorySegment;
// if the string already exists, reuse it
var segments = this.stringSegments;
if (segments.has(stringValue)) {
stringSegment = <MemorySegment>segments.get(stringValue);
// otherwise create it
stringSegment = segments.get(stringValue)!; // reuse
} else {
let length = stringValue.length;
let headerSize = (stringInstance.currentMemoryOffset + 1) & ~1;
let totalSize = headerSize + length * 2;
let buf: Uint8Array;
let pos: u32;
if (hasGC) {
buf = new Uint8Array(gcHeaderSize + totalSize);
pos = gcHeaderSize;
writeI32(ensureGCHook(this, stringInstance), buf, program.gcHookOffset);
} else {
buf = new Uint8Array(totalSize);
pos = 0;
}
writeI32(length, buf, pos + stringInstance.offsetof(LibrarySymbols.length));
pos += headerSize;
let buffer = new Uint8Array(rtHeaderSize + (length << 1));
program.writeRuntimeHeader(buffer, 0, stringInstance, length << 1);
for (let i = 0; i < length; ++i) {
writeI16(stringValue.charCodeAt(i), buf, pos + (i << 1));
writeI16(stringValue.charCodeAt(i), buffer, rtHeaderSize + (i << 1));
}
stringSegment = this.addMemorySegment(buf);
stringSegment = this.addMemorySegment(buffer);
segments.set(stringValue, stringSegment);
}
var stringOffset = stringSegment.offset;
if (hasGC) stringOffset = i64_add(stringOffset, i64_new(gcHeaderSize));
var ref = i64_add(stringSegment.offset, i64_new(rtHeaderSize));
this.currentType = stringInstance.type;
if (this.options.isWasm64) {
return this.module.createI64(i64_low(stringOffset), i64_high(stringOffset));
return this.module.createI64(i64_low(ref), i64_high(ref));
} else {
assert(i64_is_u32(stringOffset));
return this.module.createI32(i64_low(stringOffset));
assert(i64_is_u32(ref));
return this.module.createI32(i64_low(ref));
}
}