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72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
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#ifdef __EMSCRIPTEN__
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#include <emscripten.h>
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#include <iostream>
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#include <test_assert.h>
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const std::string get_wasm_file_path(const std::string& filename) {
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// Verify that we are passing a fully-qualified path
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// TODO: we need to support relative paths based on CWD
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#if _DEBUG_FOPEN
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std::cout << "get_wasm_file_path ENTER (" << filename << ")" << std::endl;
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#endif
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test_assert(
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(filename.length() > 0 && filename.at(0) == '/') ||
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(filename.length() > 1 && filename.at(1) == ':')
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);
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#if _DEBUG_FOPEN
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std::cout << "get_wasm_file_path test_assert passed " << std::endl;
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#endif
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EM_ASM_({
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//console.log('EM_ASM enter');
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let path = Module.UTF8ToString($0);
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const isWin32Path = path.match(/^[a-zA-Z]:/);
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//console.log('EM_ASM path = '+path);
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let root = '/nodefs-mount';
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if(!FS.analyzePath(root).exists) {
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//console.log('EM_ASM mkdir '+root);
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FS.mkdir(root);
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if(!isWin32Path) {
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//console.log('EM_ASM mount '+root);
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FS.mount(NODEFS, {root : '/'}, root);
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}
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}
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if(isWin32Path) {
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// Win32 path, one mount per drive
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root += "/" + path.charAt(0);
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if(!FS.analyzePath(root).exists) {
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//console.log('EM_ASM mkdir '+root);
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FS.mkdir(root);
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//console.log('EM_ASM mount '+root);
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FS.mount(NODEFS, {root : path.substr(0,3) }, root);
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}
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}
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}, filename.c_str());
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#if _DEBUG_FOPEN
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std::cout << "get_wasm_file_path EM_ASM_ passed " << std::endl;
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#endif
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std::string f = std::string("/nodefs-mount");
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if(filename.length() > 2 && filename.at(1) == ':') {
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f += std::string("/") + filename.at(0) + filename.substr(2);
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} else {
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f += filename;
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}
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#if _DEBUG_FOPEN
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std::cout << "get_wasm_file_path opening virtual path: " << f << std::endl;
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#endif
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return f;
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}
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#endif
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