tqchen commented on code in PR #663:
URL: https://github.com/apache/tvm-ffi/pull/663#discussion_r3575739786
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include/tvm/ffi/type_traits.h:
##########
@@ -536,6 +537,88 @@ struct TypeTraits<void*> : public TypeTraitsBase {
}
};
+namespace details {
+
+TVM_FFI_INLINE static std::optional<std::string_view> TryGetStringViewFromAny(
+ const TVMFFIAny* src) {
+ if (src->type_index == TypeIndex::kTVMFFIRawStr) {
+ return std::string_view(src->v_c_str);
+ }
+ if (src->type_index == TypeIndex::kTVMFFISmallStr) {
+ TVMFFIByteArray bytes = TVMFFISmallBytesGetContentByteArray(src);
+ return std::string_view(bytes.data, bytes.size);
+ }
+ if (src->type_index == TypeIndex::kTVMFFIStr) {
+ TVMFFIByteArray* bytes = TVMFFIBytesGetByteArrayPtr(src->v_obj);
+ return std::string_view(bytes->data, bytes->size);
+ }
+ return std::nullopt;
+}
+
+TVM_FFI_INLINE static std::optional<DLDeviceType>
TryParseDLDeviceType(std::string_view name) {
+ if (name == "llvm" || name == "cpu" || name == "c" || name == "test") return
kDLCPU;
+ if (name == "cuda" || name == "nvptx") return kDLCUDA;
+ if (name == "cl" || name == "opencl") return kDLOpenCL;
+ if (name == "vulkan") return kDLVulkan;
+ if (name == "metal") return kDLMetal;
+ if (name == "vpi") return kDLVPI;
+ if (name == "rocm") return kDLROCM;
+ if (name == "ext_dev") return kDLExtDev;
+ if (name == "hexagon") return kDLHexagon;
+ if (name == "webgpu") return kDLWebGPU;
+ if (name == "maia") return kDLMAIA;
+ if (name == "trn") return kDLTrn;
+ return std::nullopt;
+}
+
+TVM_FFI_INLINE static std::optional<int32_t>
TryParseDLDeviceIndex(std::string_view index) {
+ if (index.empty()) return std::nullopt;
+ int64_t sign = 1;
+ size_t pos = 0;
+ if (index[0] == '-') {
+ sign = -1;
+ pos = 1;
+ }
+ if (pos >= index.size()) return std::nullopt;
+ int64_t value = 0;
+ for (; pos < index.size(); ++pos) {
+ char ch = index[pos];
+ if (ch < '0' || ch > '9') return std::nullopt;
+ value = value * 10 + (ch - '0');
+ if (value > std::numeric_limits<int32_t>::max()) return std::nullopt;
+ }
+ value *= sign;
+ if (value < std::numeric_limits<int32_t>::min() || value >
std::numeric_limits<int32_t>::max()) {
+ return std::nullopt;
+ }
+ return static_cast<int32_t>(value);
+}
+
+TVM_FFI_INLINE static std::optional<DLDevice>
TryStringViewToDLDevice(std::string_view str) {
+ size_t space_pos = str.find(' ');
+ if (space_pos != std::string_view::npos) {
+ str = str.substr(0, space_pos);
+ }
+ size_t colon_pos = str.find(':');
+ std::string_view name = colon_pos == std::string_view::npos ? str :
str.substr(0, colon_pos);
+ if (name.empty()) return std::nullopt;
+ if (str.find(':', colon_pos == std::string_view::npos ? str.size() :
colon_pos + 1) !=
+ std::string_view::npos) {
+ return std::nullopt;
+ }
+ std::optional<DLDeviceType> device_type = TryParseDLDeviceType(name);
Review Comment:
now that we do string handling perhaps worthadding ffi/device.h like dtype.h
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