29 lines
1.5 KiB
C++
29 lines
1.5 KiB
C++
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#include "WASMStringView.hpp"
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#include "WASMHelperFile.hpp"
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wasm_func_t* ConstString_GetHash(WebAssemblyScriptResolver* resolver) {
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return WasmHelpers::CreateFunc<u32, const ArbUt::StringView*>(
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resolver, {[](WebAssemblyScriptResolver*, const ArbUt::StringView* sv) -> u32 { return sv->GetHash(); }});
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}
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wasm_func_t* ConstString_GetStr(WebAssemblyScriptResolver* resolver) {
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return WasmHelpers::CreateFunc<i32, const ArbUt::StringView*>(
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resolver, {[](WebAssemblyScriptResolver* resolver, const ArbUt::StringView* constString) -> i32 {
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// To allow webassembly to access the C String, we need to allocate it inside it's memory.
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// Length + 1 to make room for the '\0'
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auto stringPointer = resolver->AllocateMemory(constString->Length() + 1, std::alignment_of<const char>());
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// After we have the pointer to the memory allocated for the string, copy the string with specified length
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// to it, then suffix it with the null byte to end it.
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strncpy(reinterpret_cast<char*>(stringPointer.first), constString->c_str(), constString->Length());
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stringPointer.first[constString->Length()] = '\0';
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return stringPointer.second;
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}});
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}
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void WASMStringView::Register(ArbUt::Dictionary<std::string, wasm_func_t*>& externs,
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WebAssemblyScriptResolver* resolver) {
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externs.Insert("arbutils_const_string_get_hash", ConstString_GetHash(resolver));
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externs.Insert("arbutils_const_string_get_str", ConstString_GetStr(resolver));
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}
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