ARCMigrate.cpp source code [clang_source_code/tools/libclang/ARCMigrate.cpp]

1	//===- ARCMigrate.cpp - Clang-C ARC Migration Library ---------------------===//
2	//
3	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4	// See https://llvm.org/LICENSE.txt for license information.
5	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6	//
7	//===----------------------------------------------------------------------===//
8	//
9	// This file implements the main API hooks in the Clang-C ARC Migration library.
10	//
11	//===----------------------------------------------------------------------===//
12
13	#include "clang-c/Index.h"
14	#include "CXString.h"
15	#include "clang/ARCMigrate/ARCMT.h"
16	#include "clang/Config/config.h"
17	#include "clang/Frontend/TextDiagnosticBuffer.h"
18	#include "llvm/Support/FileSystem.h"
19
20	using namespace clang;
21	using namespace arcmt;
22
23	namespace {
24
25	struct Remap {
26	std::vector<std::pair<std::string, std::string> > Vec;
27	};
28
29	} // anonymous namespace.
30
31	//===----------------------------------------------------------------------===//
32	// libClang public APIs.
33	//===----------------------------------------------------------------------===//
34
35	CXRemapping clang_getRemappings(const char *migrate_dir_path) {
36	#if !CLANG_ENABLE_ARCMT
37	llvm::errs() << "error: feature not enabled in this build\n";
38	return nullptr;
39	#else
40	bool Logging = ::getenv("LIBCLANG_LOGGING");
41
42	if (!migrate_dir_path) {
43	if (Logging)
44	llvm::errs() << "clang_getRemappings was called with NULL parameter\n";
45	return nullptr;
46	}
47
48	if (!llvm::sys::fs::exists(migrate_dir_path)) {
49	if (Logging) {
50	llvm::errs() << "Error by clang_getRemappings(\"" << migrate_dir_path
51	<< "\")\n";
52	llvm::errs() << "\"" << migrate_dir_path << "\" does not exist\n";
53	}
54	return nullptr;
55	}
56
57	TextDiagnosticBuffer diagBuffer;
58	std::unique_ptr<Remap> remap(new Remap());
59
60	bool err = arcmt::getFileRemappings(remap->Vec, migrate_dir_path,&diagBuffer);
61
62	if (err) {
63	if (Logging) {
64	llvm::errs() << "Error by clang_getRemappings(\"" << migrate_dir_path
65	<< "\")\n";
66	for (TextDiagnosticBuffer::const_iterator
67	I = diagBuffer.err_begin(), E = diagBuffer.err_end(); I != E; ++I)
68	llvm::errs() << I->second << '\n';
69	}
70	return nullptr;
71	}
72
73	return remap.release();
74	#endif
75	}
76
77	CXRemapping clang_getRemappingsFromFileList(const char **filePaths,
78	unsigned numFiles) {
79	#if !CLANG_ENABLE_ARCMT
80	llvm::errs() << "error: feature not enabled in this build\n";
81	return nullptr;
82	#else
83	bool Logging = ::getenv("LIBCLANG_LOGGING");
84
85	std::unique_ptr<Remap> remap(new Remap());
86
87	if (numFiles == 0) {
88	if (Logging)
89	llvm::errs() << "clang_getRemappingsFromFileList was called with "
90	"numFiles=0\n";
91	return remap.release();
92	}
93
94	if (!filePaths) {
95	if (Logging)
96	llvm::errs() << "clang_getRemappingsFromFileList was called with "
97	"NULL filePaths\n";
98	return nullptr;
99	}
100
101	TextDiagnosticBuffer diagBuffer;
102	SmallVector<StringRef, 32> Files(filePaths, filePaths + numFiles);
103
104	bool err = arcmt::getFileRemappingsFromFileList(remap->Vec, Files,
105	&diagBuffer);
106
107	if (err) {
108	if (Logging) {
109	llvm::errs() << "Error by clang_getRemappingsFromFileList\n";
110	for (TextDiagnosticBuffer::const_iterator
111	I = diagBuffer.err_begin(), E = diagBuffer.err_end(); I != E; ++I)
112	llvm::errs() << I->second << '\n';
113	}
114	return remap.release();
115	}
116
117	return remap.release();
118	#endif
119	}
120
121	unsigned clang_remap_getNumFiles(CXRemapping map) {
122	return static_cast<Remap *>(map)->Vec.size();
123
124	}
125
126	void clang_remap_getFilenames(CXRemapping map, unsigned index,
127	CXString original, CXString transformed) {
128	if (original)
129	*original = cxstring::createDup(
130	static_cast<Remap *>(map)->Vec[index].first);
131	if (transformed)
132	*transformed = cxstring::createDup(
133	static_cast<Remap *>(map)->Vec[index].second);
134	}
135
136	void clang_remap_dispose(CXRemapping map) {
137	delete static_cast<Remap *>(map);
138	}
139

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