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#pragma once
#include <string>
#include <vector>
#include "WAVM/Inline/BasicTypes.h"
#include "WAVM/Logging/Logging.h"
#include "WAVM/Platform/File.h"
#include "WAVM/VFS/VFS.h"
namespace WAVM {
inline bool loadFile(const char* filename, std::vector<U8>& outFileContents)
{
VFS::Result result;
VFS::VFD* vfd = nullptr;
{
result = Platform::getHostFS().open(
filename, VFS::FileAccessMode::readOnly, VFS::FileCreateMode::openExisting, vfd);
if(result != VFS::Result::success) { goto printAndReturnError; }
// Ensure that we didn't open a directory.
VFS::FileInfo fileInfo;
result = vfd->getFileInfo(fileInfo);
if(result != VFS::Result::success) { goto printAndReturnError; }
else if(fileInfo.type == VFS::FileType::directory)
{
result = VFS::Result::isDirectory;
goto printAndReturnError;
}
U64 numFileBytes64 = 0;
result = vfd->seek(0, VFS::SeekOrigin::end, &numFileBytes64);
if(result != VFS::Result::success) { goto printAndReturnError; }
else if(numFileBytes64 > UINTPTR_MAX)
{
result = VFS::Result::outOfMemory;
goto printAndReturnError;
}
const Uptr numFileBytes = Uptr(numFileBytes64);
outFileContents.resize(numFileBytes);
result = vfd->seek(0, VFS::SeekOrigin::begin);
if(result != VFS::Result::success) { goto printAndReturnError; }
result = vfd->read(const_cast<U8*>(outFileContents.data()), numFileBytes);
if(result != VFS::Result::success) { goto printAndReturnError; }
result = vfd->close();
vfd = nullptr;
if(result != VFS::Result::success) { goto printAndReturnError; }
return true;
}
printAndReturnError:
Log::printf(Log::error, "Error loading '%s': %s\n", filename, VFS::describeResult(result));
if(vfd) { WAVM_ERROR_UNLESS(vfd->close() == VFS::Result::success); }
return false;
}
inline bool saveFile(const char* filename, const void* fileBytes, Uptr numFileBytes)
{
VFS::Result result;
VFS::VFD* vfd = nullptr;
{
result = Platform::getHostFS().open(
filename, VFS::FileAccessMode::writeOnly, VFS::FileCreateMode::createAlways, vfd);
if(result != VFS::Result::success) { goto printAndReturnError; }
result = vfd->write(fileBytes, numFileBytes);
if(result != VFS::Result::success) { goto printAndReturnError; }
result = vfd->close();
if(result != VFS::Result::success)
{
vfd = nullptr;
goto printAndReturnError;
}
return true;
}
printAndReturnError:
Log::printf(Log::error, "Error saving '%s': %s\n", filename, VFS::describeResult(result));
if(vfd) { WAVM_ERROR_UNLESS(vfd->close() == VFS::Result::success); }
return false;
}
inline const char* getEnvironmentVariableHelpText()
{
return "Environment variables:\n"
" WAVM_OUTPUT=<category>(,<category>)*\n"
" Enables printing of different categories of information to stdout.\n"
" Categories:\n"
" metrics Performance and memory use metrics\n"
" debug Debug information\n"
" trace-validation Trace instructions as they are validated\n"
" trace-compilation Trace instructions as they are compiled\n"
"\n"
" WAVM_OBJECT_CACHE_DIR=<directory>\n"
" Specifies a directory that WAVM will use to cache compiled object\n"
" code for WebAssembly modules.\n"
"\n"
" WAVM_OBJECT_CACHE_MAX_MB=<n>\n"
" Specifies the maximum amount of disk space that WAVM will use to\n"
" cache compiled object code.\n";
}
inline bool initLogFromEnvironment()
{
const char* wavmOutputEnv = WAVM_SCOPED_DISABLE_SECURE_CRT_WARNINGS(getenv("WAVM_OUTPUT"));
if(wavmOutputEnv && *wavmOutputEnv)
{
std::string category;
for(Uptr charIndex = 0;; ++charIndex)
{
const char c = wavmOutputEnv[charIndex];
if(c && c != ',') { category += c; }
else
{
if(category == "metrics") { Log::setCategoryEnabled(Log::metrics, true); }
else if(category == "debug")
{
Log::setCategoryEnabled(Log::debug, true);
}
else if(category == "trace-validation")
{
Log::setCategoryEnabled(Log::traceValidation, true);
}
else if(category == "trace-compilation")
{
Log::setCategoryEnabled(Log::traceCompilation, true);
}
else
{
Log::printf(Log::error,
"Invalid category in WAVM_OUTPUT environment: %s\n",
category.c_str());
return false;
}
if(!c) { break; }
else
{
category.clear();
}
}
}
}
return true;
}
}
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