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| 1 | +//===-- Ninja-C-API.cpp ---------------------------------------------------===// |
| 2 | +// |
| 3 | +// This source file is part of the Swift.org open source project |
| 4 | +// |
| 5 | +// Copyright (c) 2021 Apple Inc. and the Swift project authors |
| 6 | +// Licensed under Apache License v2.0 with Runtime Library Exception |
| 7 | +// |
| 8 | +// See http://swift.org/LICENSE.txt for license information |
| 9 | +// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| 10 | +// |
| 11 | +//===----------------------------------------------------------------------===// |
| 12 | + |
| 13 | +#include <llbuild/llbuild.h> |
| 14 | +#include <type_traits> |
| 15 | + |
| 16 | +#include "llbuild/Basic/LLVM.h" |
| 17 | +#include "llbuild/Ninja/Lexer.h" |
| 18 | +#include "llbuild/Ninja/Manifest.h" |
| 19 | +#include "llbuild/Ninja/ManifestLoader.h" |
| 20 | + |
| 21 | +#include "llvm/ADT/ArrayRef.h" |
| 22 | +#include "llvm/ADT/DenseMap.h" |
| 23 | +#include "llvm/ADT/SmallString.h" |
| 24 | +#include "llvm/ADT/STLExtras.h" |
| 25 | +#include "llvm/ADT/Twine.h" |
| 26 | +#include "llvm/Support/Allocator.h" |
| 27 | +#include "llvm/Support/MemoryBuffer.h" |
| 28 | +#include "llvm/Support/raw_ostream.h" |
| 29 | + |
| 30 | +using namespace llbuild; |
| 31 | +using namespace llbuild::ninja; |
| 32 | + |
| 33 | +static llb_string_ref_t toCRef(StringRef str) { |
| 34 | + return { str.size(), str.data() }; |
| 35 | +} |
| 36 | + |
| 37 | +namespace { |
| 38 | +class CAPIManifestActions : public ManifestLoaderActions { |
| 39 | + SmallVectorImpl<char> &Error; |
| 40 | + |
| 41 | +public: |
| 42 | + CAPIManifestActions(SmallVectorImpl<char> &error) : Error(error) {} |
| 43 | + |
| 44 | + virtual void initialize(ninja::ManifestLoader *Loader) override {} |
| 45 | + |
| 46 | + virtual void error(StringRef path, StringRef message, |
| 47 | + const Token &at) override { |
| 48 | + addError(message, path, at.line, at.column); |
| 49 | + } |
| 50 | + |
| 51 | + virtual std::unique_ptr<llvm::MemoryBuffer> readFile( |
| 52 | + StringRef path, StringRef forFilename, |
| 53 | + const Token *forToken) override { |
| 54 | + auto bufferOrError = llvm::MemoryBuffer::getFile(path); |
| 55 | + if (!bufferOrError) { |
| 56 | + auto ec = bufferOrError.getError(); |
| 57 | + addError(ec.message(), forFilename); |
| 58 | + return nullptr; |
| 59 | + } |
| 60 | + return std::move(*bufferOrError); |
| 61 | + } |
| 62 | + |
| 63 | +private: |
| 64 | + void addError(StringRef message, StringRef path) { |
| 65 | + llvm::raw_svector_ostream stream(Error); |
| 66 | + stream << path << ": " << message << "\n"; |
| 67 | + } |
| 68 | + |
| 69 | + void addError(StringRef message, StringRef path, unsigned line, |
| 70 | + unsigned column) { |
| 71 | + llvm::raw_svector_ostream stream(Error); |
| 72 | + stream << path << ":" << line << ":" << column << ": " << message << "\n"; |
| 73 | + } |
| 74 | +}; |
| 75 | + |
| 76 | +class CAPIManifest { |
| 77 | + std::unique_ptr<Manifest> Underlying; |
| 78 | + SmallString<0> Error; |
| 79 | + llvm::BumpPtrAllocator Allocator; |
| 80 | + ArrayRef<llb_ninja_build_statement_t> Statements; |
| 81 | + ArrayRef<llb_string_ref_t> DefaultTargets; |
| 82 | + |
| 83 | + using RuleCacheTy = llvm::DenseMap<const Rule *, const llb_ninja_rule_t *>; |
| 84 | + |
| 85 | + template <typename Input, typename F> |
| 86 | + auto copyTransformed(const Input &orig, F &&transform) { |
| 87 | + using R = decltype(transform(*(orig.begin()))); |
| 88 | + auto copied = llvm::makeMutableArrayRef(Allocator.Allocate<R>(orig.size()), |
| 89 | + orig.size()); |
| 90 | + for (auto it : llvm::enumerate(orig)) { |
| 91 | + copied[it.index()] = transform(it.value()); |
| 92 | + } |
| 93 | + return copied; |
| 94 | + } |
| 95 | + |
| 96 | + CAPIManifest() {} |
| 97 | + |
| 98 | +public: |
| 99 | + static llb_ninja_manifest_t build(StringRef filename, |
| 100 | + StringRef workingDirectory) { |
| 101 | + auto manifest = new CAPIManifest(); |
| 102 | + |
| 103 | + CAPIManifestActions actions(manifest->Error); |
| 104 | + ninja::ManifestLoader loader(workingDirectory, filename, actions); |
| 105 | + |
| 106 | + if (auto underlying = loader.load()) { |
| 107 | + manifest->Underlying = std::move(underlying); |
| 108 | + manifest->allocateRefs(); |
| 109 | + } |
| 110 | + |
| 111 | + return { |
| 112 | + reinterpret_cast<llb_ninja_raw_manifest_t>(manifest), |
| 113 | + manifest->Statements.size(), manifest->Statements.data(), |
| 114 | + manifest->DefaultTargets.size(), manifest->DefaultTargets.data(), |
| 115 | + toCRef(manifest->Error) |
| 116 | + }; |
| 117 | + } |
| 118 | + |
| 119 | +private: |
| 120 | + void allocateRefs() { |
| 121 | + RuleCacheTy ruleCache; |
| 122 | + |
| 123 | + Statements = copyTransformed( |
| 124 | + Underlying->getCommands(), |
| 125 | + [&](const Command *statement) -> llb_ninja_build_statement_t { |
| 126 | + auto explicitInputs = copyRefs(statement->explicitInputs_begin(), |
| 127 | + statement->explicitInputs_end()); |
| 128 | + auto implicitInputs = copyRefs(statement->implicitInputs_begin(), |
| 129 | + statement->implicitInputs_end()); |
| 130 | + auto orderOnlyInputs = copyRefs(statement->orderOnlyInputs_begin(), |
| 131 | + statement->orderOnlyInputs_end()); |
| 132 | + auto outputs = copyRefs(statement->getOutputs()); |
| 133 | + auto variables = copyRefs(statement->getParameters()); |
| 134 | + |
| 135 | + return { |
| 136 | + copyRefs(statement->getRule(), ruleCache), |
| 137 | + toCRef(statement->getCommandString()), |
| 138 | + toCRef(statement->getDescription()), |
| 139 | + explicitInputs.size(), explicitInputs.data(), |
| 140 | + implicitInputs.size(), implicitInputs.data(), |
| 141 | + orderOnlyInputs.size(), orderOnlyInputs.data(), |
| 142 | + outputs.size(), outputs.data(), |
| 143 | + variables.size(), variables.data(), |
| 144 | + statement->hasGeneratorFlag(), |
| 145 | + statement->hasRestatFlag() |
| 146 | + }; |
| 147 | + }); |
| 148 | + DefaultTargets = copyRefs(Underlying->getDefaultTargets()); |
| 149 | + } |
| 150 | + |
| 151 | + ArrayRef<llb_string_ref_t> copyRefs(ArrayRef<Node *> nodes) { |
| 152 | + return copyTransformed(nodes, [](auto &node) -> llb_string_ref_t { |
| 153 | + auto &path = node->getScreenPath(); |
| 154 | + return { path.size(), path.data() }; |
| 155 | + }); |
| 156 | + } |
| 157 | + |
| 158 | + ArrayRef<llb_string_ref_t> copyRefs( |
| 159 | + const std::vector<Node*>::const_iterator &begin, |
| 160 | + const std::vector<Node*>::const_iterator &end) { |
| 161 | + return copyRefs(llvm::makeArrayRef(&*begin, &*end)); |
| 162 | + } |
| 163 | + |
| 164 | + ArrayRef<llb_ninja_variable_t> copyRefs( |
| 165 | + const llvm::StringMap<std::string> &variables) { |
| 166 | + return copyTransformed(variables, [&](auto &var) -> llb_ninja_variable_t { |
| 167 | + return { toCRef(var.getKey()), toCRef(var.getValue()) }; |
| 168 | + }); |
| 169 | + } |
| 170 | + |
| 171 | + const llb_ninja_rule_t *copyRefs(const Rule *rule, RuleCacheTy &ruleCache) { |
| 172 | + const llb_ninja_rule_t *&cRule = ruleCache[rule]; |
| 173 | + if (cRule) |
| 174 | + return cRule; |
| 175 | + |
| 176 | + auto cParams = copyRefs(rule->getParameters()); |
| 177 | + return new (Allocator) llb_ninja_rule_t { |
| 178 | + toCRef(rule->getName()), |
| 179 | + cParams.size(), cParams.data() |
| 180 | + }; |
| 181 | + } |
| 182 | +}; |
| 183 | +} |
| 184 | + |
| 185 | +llb_ninja_manifest_t llb_manifest_fs_load( |
| 186 | + const char *filename, const char *workingDirectory) { |
| 187 | + return CAPIManifest::build(filename, workingDirectory); |
| 188 | +} |
| 189 | + |
| 190 | +void llb_manifest_destroy(llb_ninja_manifest_t *manifest) { |
| 191 | + delete reinterpret_cast<CAPIManifest *>(manifest->raw_manifest); |
| 192 | +} |
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